CN108135130B

CN108135130B - Combine harvester

Info

Publication number: CN108135130B
Application number: CN201680049582.XA
Authority: CN
Inventors: 楠濑善雄; 冈田晋辅
Original assignee: Yanmar Power Technology Co Ltd
Current assignee: Yanmar Power Technology Co Ltd
Priority date: 2015-10-16
Filing date: 2016-10-07
Publication date: 2020-12-15
Anticipated expiration: 2036-10-07
Also published as: KR102095662B1; CN115643892A; JP2017074027A; WO2017065117A1; JP6484158B2; CN108135130A; KR20180034574A; CN112425351A

Abstract

The combine harvester of the invention comprises: a harvesting device 3 for harvesting the non-harvested ear stalks in the field; a threshing device 5 that threshes the cut ear stalks cut by the cutting device 3; a traveling machine body 1 on which a harvesting device 3 and a threshing device 5 are mounted; and an engine 20 disposed in an engine room 43 of the traveling machine body 1. The harvesting device 3 includes a supply chamber 31 communicating with a threshing opening at the front of the threshing device 5, and the engine 20 includes an exhaust gas purification device 50 for purifying exhaust gas. The operation portion 15 provided in the operation portion 10 is disposed adjacent to the supply chamber 31. A cavity portion 65a communicating from the engine room 43 toward the material supply chamber 31 is provided below the operation portion 15, and a part of the cavity portion 65a opens above the material supply chamber 31.

Description

Combine harvester

Technical Field

The invention relates to a combine harvester which can harvest grains by harvesting the non-harvested ear stalks in the field by a harvesting device and threshing the harvested ear stalks by a threshing device.

Background

In the related art, a combine harvester (work vehicle) as an agricultural work machine for use in a field is configured to: the grain harvester is provided with a traveling machine body on which an engine is mounted, and a pair of left and right traveling crawler belts (traveling unit) are mounted on the traveling machine body, and the pair of left and right traveling crawler belts are moved in a field or the like by driving and controlling the pair of left and right traveling crawler belts.

Further, in the conventional combine harvester, the following combine harvester is proposed: a pre-cleaner (pre-cleaner) for introducing fresh air into the engine is provided above the machine body, and a tail pipe for discharging exhaust gas from the engine is provided below the machine body (see patent document 1). However, when the exhaust device including the tail pipe is provided below the machine body, not only the exhaust resistance is reduced by the soil or the like from the field being carried in the traveling, but also there is a possibility that the straw chips or the like enter and catch fire or the like. Therefore, a combine harvester in which a tail pipe is disposed above a machine body in the same manner as a prefilter has been proposed (see patent document 2).

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

Patent document

Patent document 1: japanese patent laid-open publication No. 2015-132186

Patent document 2: japanese patent laid-open No. 2014-042477

Disclosure of Invention

In addition, since the combine harvester includes various devices such as a harvesting device and a threshing device, an engine room is formed below the cab on the right side of the harvesting device, and an engine is mounted in the engine room. In recent years, in accordance with the demand for a compact and lightweight combine harvester, there is a limit to the size of an engine room in many cases (the engine mounting space is narrow in many cases). In addition to the engine, various components such as an air cleaner and a radiator are disposed in the engine room which is limited to a large extent.

On the other hand, when the exhaust gas purification device is provided instead of the muffler provided in the combine harvester of patent document 2 as in the combine harvester of patent document 1, the exhaust gas purification device has a larger weight and a larger capacity than the muffler. Therefore, when the engine having the exhaust gas purification device mounted thereon is installed in the combine harvester, the arrangement position of the exhaust gas purification device not only affects the arrangement of other components in the engine room, but also lengthens the intake path and the exhaust path.

In addition, when the prefilter and the tail pipe are fixed above the threshing device, the prefilter and the tail pipe are disposed at the rear, and the exhaust path and the intake path become long, because the arrangement positions of the grain discharge conveyor (discharge auger), the winnowing conveyor, and the like are affected. On the other hand, when the exhaust path and the intake path are shortened, there is a possibility that heat discharged from the engine and the exhaust path may affect the driver's seat. In particular, when an exhaust gas purification device that performs regeneration treatment at a high temperature is mounted as in the combine harvester of patent document 1, not only the intake path and the driver's seat are affected by heat discharged from the exhaust path, but also the engine room is not affected so much by heat discharged from the engine room.

The technical problem of the present invention is to provide a combine harvester improved by considering the above-mentioned current situation.

The present invention provides a combine harvester, comprising: the cutting device is used for cutting the non-harvested ear stalks in the field; a threshing device that threshes the cut ear stalks cut by the cutting device; a traveling machine body provided with the harvesting device and the threshing device; an engine provided in an engine room on the traveling machine body; and an operation unit disposed above the engine room, wherein the harvesting device includes a supply chamber communicating with a threshing opening at a front portion of the threshing device, the engine includes an exhaust gas purification device for purifying exhaust gas, an operation unit provided in the operation unit is disposed adjacent to the supply chamber, a cavity portion communicating from the engine room toward the supply chamber is provided below the operation unit, and a part of the cavity portion opens above the supply chamber. The harvesting device is configured to be adjustable in elevation, and an opening portion of the cavity portion above the feed chamber is enlarged in a harvesting operation in a field.

In the above-described combine harvester, the operation unit may include an operation element disposed on an upper surface thereof, a partition plate having an L-shape in side view covering an upper side and a front side of the cavity, a link mechanism connected to the operation element may be provided in a space above and in front of the partition plate, the partition plate may protrude toward the feed chamber, and a heat insulating material may be attached to a surface covering the cavity.

In the above-described combine harvester, the exhaust gas inlet side of the exhaust gas purification device may be disposed so as to protrude from the driving operation unit toward the supply chamber side, and a front surface and an upper surface of the exhaust gas purification device may be covered with the partition plate.

The above-described combine harvester may be configured such that the partition plate includes: a bottom plate that covers an upper portion of the cavity; and a back plate that covers a front of the cavity, wherein the bottom plate is provided with: extends obliquely downward toward the harvesting device and, at the same time, extends obliquely upward toward the rear.

The combine may include: an exhaust gas purification device support bracket having one end coupled to a cylinder head of the engine to support the exhaust gas purification device; and an exhaust pipe support bracket that is connected to the exhaust gas purification device support bracket and extends upward to support an exhaust outlet pipe of the exhaust gas purification device, wherein the exhaust pipe support bracket is disposed in parallel with the rear surface plate of the partition plate across the exhaust gas purification device.

In the above-described combine harvester, an air cleaner supported by the engine room frame and an attenuator disposed below the air cleaner and behind the exhaust gas purification device may be provided in an intake path of the engine, and the exhaust pipe support bracket may be disposed between the attenuator and the exhaust gas purification device.

Further, a combine harvester includes: the cutting device is used for cutting the non-harvested ear stalks in the field; a threshing device that threshes the cut ear stalks cut by the cutting device; a grain tank for storing grains obtained by threshing by the threshing device; the traveling machine body is provided with the cutting device, the threshing device and the grain box in an assembled manner; and an engine provided in an engine room on the traveling machine body, wherein an intake path and an exhaust path of the engine are disposed between the grain tank and the threshing device, and the engine is provided above the machine body: a prefilter serving as a new air introduction portion of the intake path; and a tail pipe as an exhaust gas discharge unit of the exhaust path, wherein the intake path is disposed closer to a driver seat than the exhaust path, and an intake pipe is disposed in a portion closer to the exhaust path in the intake path. Thus, since the intake path is disposed between the driver's seat and the exhaust path, the intake path can be made to function as a heat insulating member that insulates heat discharged from the exhaust path behind the driver's seat. Therefore, the hot air from the exhaust path such as the tail pipe can be prevented from being transmitted to the operator seated in the driver seat. Further, the intake pipe in the portion close to the exhaust path is formed of a metal pipe, whereby not only deformation and the like due to the influence of heat from the exhaust path can be suppressed, but also the rigidity of the intake path can be secured.

In the above-described combine harvester, an engine room frame constituting an engine room including the engine therein may be provided so as to stand from the traveling machine body, an operator seat having the operator seat may be provided above the engine room, and the intake duct and the tail duct may be connected to the engine room frame behind the operator seat. Thus, the intake pipe and the tail pipe are supported in a concentrated manner on the engine room frame, so that the support structure can be simplified, and the assembly and maintenance of the intake path and the exhaust path of the engine can be improved.

The combine may be provided with an exhaust gas purification device for purifying exhaust gas from the engine. An exhaust outlet of an exhaust outlet pipe of the exhaust gas purification device is inserted into an exhaust inlet of the tail pipe extending into the engine room, and the exhaust pipe and the exhaust gas purification device are supported by the engine through a first support bracket, while the tail pipe is supported by the engine room frame through a second support bracket. That is, the exhaust outlet pipe and the tail pipe, which are separately connected, can be supported by the engine and the traveling machine body, which are of the same vibration system as the exhaust outlet pipe and the tail pipe, respectively. Therefore, the exhaust outlet pipe and the tail pipe are not affected by other vibration systems, and breakage or failure can be prevented. Further, since the tail pipe is separated from the vibration system of the engine, the possibility of breakage of the tail pipe due to a difference in vibration frequency between the diesel engine side and the traveling vehicle side can be further suppressed.

In the above-described combine harvester, the tail pipe may be a double pipe including an inner pipe and an outer pipe, the exhaust gas outlet pipe may be inserted into the inner pipe, and the second support bracket may be coupled to each of the inner pipe and the outer pipe. The inner pipe and the outer pipe of the tail pipe are fixed by the second support bracket, respectively, and thus the inner pipe and the outer pipe can be supported so as to maintain the relative position of the inner pipe with respect to the outer pipe.

The combine may be configured such that the second support bracket is L-shaped, and includes: a first connecting part extending in the vertical direction; and a second coupling portion extending forward from a lower end of the first coupling member, wherein a middle portion of the outer pipe is coupled to an upper end of the first coupling portion, the middle portion of the first coupling portion is coupled to the engine room frame, and a front end of the inner pipe is coupled to a front end of the second coupling portion. 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 compartment, and the high-temperature exhaust gas discharged from the exhaust outlet pipe can be sufficiently cooled and discharged to the outside at the tail pipe.

In the above-described combine harvester, the intake duct may be connected to the engine room frame via a third support bracket and may be provided to extend in the vertical direction on a side of the tail duct, and the third support bracket may have a shape of: the coupling portion with the intake pipe is disposed further forward than the coupling portion with the engine room frame. In the third support bracket, since the portion coupled to the intake pipe is disposed further forward than the portion coupled to the engine room frame, it is possible to provide: by providing an appropriate gap between the intake path and the exhaust path, the thermal influence between the intake and exhaust can be easily alleviated.

According to the present invention, the lower side of the driving operation unit, which is a part of the engine room, is covered with the partition plate. Therefore, not only the influence of heat of the exhaust gas purification device serving as a heat generating body and the engine on the driver's part can be suppressed, but also the cooling air flowing in the engine room can be guided to the opening portion on the supply chamber side, and the exhaust heat air is prevented from being accumulated in the engine room, and the cooling effect in the engine room can be improved.

According to the invention of the present application, the exhaust gas purification apparatus is configured to: the operation portion protrudes from the left side surface of the operation portion toward the supply chamber, and the exhaust gas purification device is covered by a partition plate. Therefore, not only the air heated by the heat emitted from the engine and the exhaust gas purification device can be prevented from spreading to the driver's seat, but also the operator can be prevented from coming into contact with high-temperature components such as the exhaust gas purification device as a heat generating body.

According to the invention of the present application, the outlet pipe support bracket is constituted by: since the width is large in the left-right direction (the same direction as the output shaft of the engine) as in the back plate of the partition plate body, the cooling air passing through the engine room can be guided to the supply chamber side, and the cooling air can be suppressed 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.

Drawings

Fig. 1 is a left side view of a general type combine harvester of the present invention.

Fig. 2 is a right side view of the combine.

Fig. 3 is a top view of the combine.

Fig. 4 is a front sectional view of the combine harvester.

Fig. 5 is a left side view of the driving portion.

Fig. 6 is a perspective view of the driver's part as viewed from the left front.

Fig. 7 is a perspective view of the cab as viewed from the right side and the rear.

Fig. 8 is a perspective view showing a frame structure on a travel machine body of the combine harvester.

Fig. 9 is a rear perspective view showing the relationship of the engine room frame and the engine.

Fig. 10 is a perspective view from the left side forward showing a frame structure around the cab.

Fig. 11 is a perspective view from the left rear showing a frame structure around the cab.

Fig. 12 is a perspective view from the right side front showing the structure of the driver's part.

Fig. 13 is a front sectional view of the cab.

Fig. 14 is an enlarged perspective view of the driver's part as viewed from the left front.

Fig. 15 is an enlarged perspective view from the left side front showing the frame structure of the side pillar.

Fig. 16 is a perspective view of the diesel engine viewed from the front right oblique side.

Fig. 17 is a perspective view of the diesel engine as viewed from the rear left oblique side.

Fig. 18 is a right side view of the diesel engine.

Fig. 19 is a left side view of the diesel engine.

Fig. 20 is a plan view of the diesel engine.

Fig. 21 is a perspective view of the engine room as viewed from the left side front.

Fig. 22 is a perspective view showing a tail pipe support structure.

Fig. 23 is an exploded perspective view showing a support structure of the intake system and the exhaust system.

Fig. 24 is a left side view of a general type combine as another embodiment of the present invention.

Fig. 25 is a right side view of the combine.

Fig. 26 is a top view of the combine.

Detailed Description

Hereinafter, an embodiment embodying the combine harvester according to the present invention will be described with reference to the drawings. In the following description, the left side when facing the traveling machine body 1 in the forward direction is simply referred to as the left side, and similarly, the right side when facing the forward direction is simply referred to as the right side. A combine harvester according to an embodiment will be described with reference to fig. 1 to 7. As shown in fig. 1 to 7, a traveling machine body 1 supported by a pair of left and right traveling crawler belts 2 (traveling unit) is provided. A cutting unit 3 for cutting and taking in the ear stem while cutting is mounted on the front part of the traveling machine body 1 by a single-acting hydraulic cylinder 4 for elevation so as to be adjustable in elevation around a cutting pivot shaft 4 a. The traveling machine body 1 is mounted with: a threshing device 5 having a threshing cylinder 51; and a grain tank 7 for storing the threshed grains. The threshing device 5 is disposed on the left side in the forward direction of the traveling machine body 1, and the grain tank 7 is disposed on the right side in the forward direction of the traveling machine body 1.

A vertical conveyor 8 for discharging grains in the grain tank 7 to the outside of the machine body is provided upright from the rear to the upper side of the grain tank 7. The grain discharging conveyor 9 connected to the receiving conveyor 8a above the vertical conveyor 8 is configured to: the grain outlet 9a at the front end can be rotated to the side of the machine body. When the grain discharge conveyor 9 receives grains conveyed upward by the vertical conveyor 8 at the rear of the grain tank 7 from the receiving conveyor 8a, the grains are conveyed toward the grain discharge port 9a in the horizontal direction, and are discharged to a container or a truck outside the harvester. The auger support 125 is provided upright on the upper surface of the threshing device 5, and the grain discharge conveyor 9 is supported at a storage position above the travel machine body 1 by the auger support 125. The grain discharge conveyor 9 is supported in a substantially horizontal posture by the auger support 125.

A steering unit 10 is provided in front of the grain tank 7 and in front of the right side of the travel machine body 1. The driver unit 10 includes: a pedal 10a for riding an operator; a driver seat 10 b; a handle column (handle column)11 provided with a steering handle 10 c; a side column 15 provided with operation elements such as a main shift lever 12, an auxiliary shift lever 13, operation

clutch levers

14a and 14b, and switches; an operation device box 17 including operation devices such as a lever switch (lever switch) 16; and an electric component box 18 in which an engine controller and the like are built. In the present embodiment, the harvesting clutch lever and the threshing clutch lever that are turned on and off to transmit power to the harvesting unit 3 and the threshing unit 5 are shown as examples of the working

clutch levers

14a and 14b, and the conveyor position control lever for controlling the grain discharge conveyor 9 is shown as an example of the lever switch 16.

The handle post 11 is disposed in front of the driver seat 10b, the side post 15 is disposed on the left side of the driver seat 10b, and the handle post 11 and the side post 15 are provided so as to stand in an L shape in plan view from the traveling machine body 1 so that the right side of the driver seat 10b is open. The operator box 17 is disposed behind the side pillars 15, the electric component box 18 is disposed behind the driver seat 10b, upper surfaces of the operator box 17 and the electric component box 18 disposed adjacent to each other on the left and right are located above a backrest of the driver seat 10b, and the operator box 17 and the electric component box 18 are provided upright so as to cover the rear of the driver section 10.

The traveling machine body 1 is provided with a diesel engine 20 as a power source of each driving unit 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 is provided with: a drive sprocket 22 that transmits power of the engine 20 to the crawler belt 2; a tension roller 23 that maintains a tensioned state of the travel crawler 2; and a plurality of track rollers 24 that maintain the ground-contacting side of the traveling track 2 in a ground-contacting state. The drive sprocket 22 supports the front side of the crawler 2, the tension roller 23 supports the rear side of the crawler 2, and the track roller 24 supports the ground contact side of the crawler 2.

The harvesting device 3 includes: a feed chamber 31 communicating with a threshing opening 5a at the front of the threshing device 5; and a horizontally long bucket-shaped grain header 32 provided to be connected to the front end of the supply chamber 31. A raking auger 33 (platform auger) is rotatably supported in the grain header 32. A raking drum 34 with a raking tooth beam is arranged above the front part of the raking auger 33. A cutter 35 in the shape of a pusher is disposed in the front of the grain header 32. The left and right seedling dividing bodies 36 are protrudingly arranged on the left and right sides of the front part of the grain header 32. Further, a supply conveyor 37 is provided in the supply chamber 31. The lower surface portion of the feed chamber 31 and the front end portion of the travel machine body 1 are connected by the elevation hydraulic cylinder 4, and the cutting device 3 is moved up and down by the elevation hydraulic cylinder 4 with the cutting pivot shaft 4a (feed chamber conveyor shaft as the cutting input shaft) as an elevation fulcrum.

According to the above configuration, the ear tip side of the non-harvested ear stalks between the right and left seedling separators 36 is raked by the raking reel 34, the stalk side of the non-harvested ear stalks is harvested by the cutter 35, and the harvested ear stalks are gathered near the inlet of the feeding chamber 31 near the center portion in the right and left width directions of the grain header 32 by the rotational drive of the raking auger 33. The structure is as follows: all the ear stalks of the grain header 32 are conveyed by the feed conveyor 37 and fed to the threshing opening 5a of the threshing device 5.

The grain header 32 is connected to the front portion of the feed chamber 31 via a horizontal tilt adjustment fulcrum shaft 38 so as to be capable of horizontal tilt adjustment. The grain header 32 is provided with a hydraulic cylinder 39 for adjusting the left and right inclination, which rotates the grain header 32 around a left and right inclination adjustment fulcrum shaft 38, and the inclination angle of the grain header 32 in the left and right direction is adjusted by the cylinder 39, so that the grain header 32, the cutter 35, and the raking reel 34 are horizontally supported on the ground in the field.

In addition, the threshing cylinder 51 is provided rotatably in the threshing chamber of the threshing device 5. The threshing cylinder 51 is pivotally supported by a threshing cylinder shaft 52 extending in the front-rear direction of the traveling machine body 1. A receiving net 54 for leaking grains downward is provided below the threshing cylinder 51. Further, a helical blade-shaped intake blade is projected on the outer peripheral surface of the front portion of the threshing cylinder 51 so as to face radially outward. According to the above configuration, the ear stalks fed from the threshing opening 5a are conveyed toward the rear of the traveling machine body 1 by the rotation of the threshing cylinder 51, and kneading and threshing are performed between the threshing cylinder 51 and the receiving net 54. The grains and other threshed material smaller than the mesh of the receiving net 54 leak downward from the receiving net 54. The straw chips and the like that do not leak downward from the receiving net 54 are discharged to the field from the dust discharge port at the rear of the threshing device 5 by the conveying action of the threshing cylinder 51.

A plurality of dust feed valves (not shown) for adjusting the conveying speed of the threshing material in the threshing chamber are pivotally mounted above the threshing cylinder 51 so as to be rotatable. The conveying speed (retention time) of the threshing objects in the threshing chamber can be adjusted according to the variety and the property of the ear stalks which are cut and the angle adjustment of the dust feeding valve. On the other hand, a grain screening mechanism 55 disposed below the threshing device 5 includes a swinging screening tray 56 for specific gravity screening, and the swinging screening tray 56 includes a grain tray, a rough screen, a grain screen, a straw sorter, and the like.

The grain sorting mechanism 55 includes a winnowing fan 57 for supplying a sorting wind to the swing sorting tray 56. The structure is as follows: the threshed material that has been threshed by the threshing cylinder 51 and has leaked downward from the receiving net 54 is sorted into grains (first-class products such as fine grains), a mixture of grains and straws (second-class products such as grains with branches), straw chips, and the like by the specific gravity sorting action of the swing sorting tray 56 and the wind force sorting action of the winnowing fan 57, and the like, and taken out.

A first-class product conveying mechanism 58 and a second-class product conveying mechanism 59 are provided as the grain sorting mechanism 55 on the lower side of the swinging sorting tray 56. The grains (first-quality products) dropped from the swing sifting tray 56 by sifting with the swing sifting tray 56 and the winnowing fan 57 are collected into the grain tank 7 by the first-quality product conveying mechanism 58 and the winnowing conveyor 60. The mixture of grains and straws (second-class product) is returned to the threshing start end side of the threshing cylinder 51 by the second-class product conveying mechanism 59, the second-class product reduction conveyor 61, and the like, and is subjected to re-threshing by the threshing cylinder 51. The structure is as follows: the straw scraps are discharged to the field from a dust discharge port at the rear part of the running machine body 1.

Next, a mounting structure of the diesel engine 20 will be described with reference to fig. 7 to 13. The diesel engine 20 is supported by an engine bed 41 under a driver seat 10b of the traveling machine body 1 in a vibration-proof manner. The driving force of the diesel engine 20 is transmitted to the traveling drive transmission 42 and the threshing device 5 at the front of the track frame 21 via a pulley and a belt transmission system. The front surface side and the upper surface side of the diesel engine 20 are covered with an engine room cover 44. Further, a partition plate body 65 as a heat insulating plate body is stretched and erected below the side pillar 15, and a part of the upper surface side of the diesel engine 20 is covered with the partition plate body 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 air tunnel box 46 is provided upright via an opening/closing fulcrum shaft at the right-side end of cab 10 on traveling machine body 1. The water-cooling radiator 47 is provided upright on the inner side of the wind tunnel box 46 on the upper surface side of the traveling machine body 1, and the radiator 47 faces the cooling fan 48 of the diesel engine 20. Outside air (cooling air) is taken into the wind tunnel case 46 from the harvester outside opening on the right side of the wind tunnel case 46, the dust-removed cooling air is sent into the engine room 43 from the harvester inside opening on the left side of the wind tunnel case 46 by the rotation of the cooling fan 48 through the radiator 47, and the diesel engine 20 and the like are cooled by the dust-removed cooling air.

In addition, a dust removal net is stretched across the harvester outer opening on the right side of the wind tunnel box 46. The presence of the dust removal net prevents straw chips and the like from entering the wind tunnel box 46 and the engine room 43. Further, a shroud 481 is fixed so as to cover the entire ventilation range portion of the radiator 47, and the cooling fan 48 is disposed in an opening formed in the shroud 481. That is, the cooling fan 48 is disposed on the left side of the radiator 47, and the fan guard 481 is disposed between the cooling fan 48 and the radiator 47 to guide the cooling air.

A pair of left and right pillar frames 71 constituting an engine room frame are provided upright on the rear side of the cab 10 on the upper surface of the traveling machine body 1, and a rear panel body 72 is stretched between the left and right pillar frames 71. That is, the engine room 43 is formed (partitioned) by the partition plate body 65, the engine room cover 44, the wind tunnel box 46, and the back panel body 72. In the engine room 43, the diesel engine 20 is disposed in a state in which an output shaft 20a (crankshaft) of the diesel engine 20 is oriented in the left-right direction. The left end of the output shaft 20a protrudes to the left of the diesel engine 20, and a travel drive belt and a threshing drive belt are coupled to the left end (protruding end) of the output shaft 20 a. 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 output from the output shaft 20a to the threshing device 5 via the threshing drive belt.

The engine room cover 44 includes: a front surface portion 441 extending upward from the rear edge of the step 10 a; and an upper surface portion 442 extending rearward from an upper end of the front surface portion 441, so that the engine room cover 44 is formed in an inverted L shape in a side view. A driver seat 10b is mounted on an upper surface portion 442 of the engine room cover 44 via a seat support mechanism. The engine room cover 44 has a space therein by a double structure, and the space inside the engine room cover 44 and the space inside the air box 46 communicate with each other by connecting the left side surface of the engine room cover 44 to the air box 46. Further, an opening 443 for air introduction is provided in each of the front surface portion 441 and the upper surface portion 442 of the engine compartment cover 44.

When air is introduced into the engine room cover 44 from outside air through the opening 443, the air passes through the upper surface portion 442 of the engine room cover 44 below the driver seat 10b and flows into the wind tunnel case 46. Therefore, the air flows into the engine room cover 44, and the heat insulation effect is exerted between the cab 10 and the engine room 43, whereby the influence of the heat discharged from the engine 20 and the exhaust gas purification device 50 on the cab 10 can be suppressed. In the air tunnel box 46, the air from the engine room cover 44 joins the air taken in by the air tunnel box 46, flows into the engine room 43, and passes through the engine room 43 toward the supply room 31 of the harvesting device 3. As a result, air is caused to pass through engine compartment 43 from air tunnel tank 46 toward supply chamber 31, and this air is caused to function as cooling air in engine compartment 43.

As shown in fig. 9 to 15, a side pillar 15 that is a part of the driving operation portion is fixed to the left side of the engine room cover 44 and is disposed on the side of the driver seat 10 b. One end of the pillar support beam frame 66 that supports the side pillar 15 is connected to a middle portion of the left pillar frame 71. The side pillar 15 has a cavity portion 65a formed by cutting a rear lower side thereof and has an L-shape in a side view, and a part of the exhaust gas purifying device 50 provided above the engine is disposed in the cavity portion 65 a. A part of the cavity portion 65a of the side post 15 opens above the supply chamber 31 of the harvesting device 3.

As described above, the harvesting device 3 is configured to be capable of being adjusted in the vertical direction, and a part of the cavity 65a is opened largely above the feed chamber 31 in the harvesting operation of the field and the like. That is, when the harvesting device 3 is lowered around the harvesting pivot shaft 4a by the hydraulic cylinder 4 for elevation so that the grain header 32 is disposed at the ear stalk harvesting position, the upper surface of the feed chamber 31 is located at a position separated from the bottom plate 65b of the partition plate body 65. Therefore, the opening 443 between the partition plate body 65 and the supply chamber 31 is enlarged in the cavity portion 65a, so that the cooling air flowing in the engine room 43 is easily discharged, and the heat radiation effect in the engine room 43 is improved.

The side column 15 has

operating levers

12, 13, 14a, 14b, operating elements such as operating switches, and the like arranged on the upper surface thereof, and has a partition plate body 65 having an L-shape in side view covering the upper and front sides of the cavity portion 65a on the lower side of the column support beam frame 66. The side column 15 has a structure in which the upper and front sides of the partition plate body 65 are covered with the side column cover 67, and a link mechanism connected to the operation levers 12, 13, 14a, and 14b is provided in a space above and in front of the partition plate body 65. The partitioning plate 65 protrudes toward the supply chamber 31 of the harvesting device 3, and is configured as a heat insulating plate body to which a heat insulating material is attached to a surface covering the cavity portion 65 a.

A cavity 65a that becomes a tunnel-like space in the lateral direction is provided on the lower surface side of the side pillar 15 of the steering portion 10, and a part of the exhaust gas purification device 50 provided on the upper surface of the engine 20 is disposed in the cavity 65 a. The structure is as follows: the exhaust gas purification device 50 in the engine compartment 43 can be visually confirmed from the upper surface side of the supply chamber 31 of the harvesting device 3. A partition plate body 65 is provided on the upper surface and the front surface of the cavity portion 65a, and a heat insulating sheet is bonded to the partition plate body 65. A cooling fan 48 is disposed on a side portion of the engine room 43 opposite to the installation portion of the feed chamber 31, and a cavity portion 65a is formed, and the cavity portion 65a is formed as a tunnel-like space in the left-right direction so as to discharge the cooling air of the cooling fan 48 from the engine room 43 to the upper surface side of the feed chamber 31.

The exhaust gas purification device 50 is configured to: the exhaust gas inlet side is taken as the left side (the feed chamber 31 side), and the longitudinal direction is along the left-right direction on the engine 20. The engine room cover 44 and the partition plate body 65 are arranged in a left-right arrangement above the engine room 43, and the front surface and the upper surface 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 by the engine room cover 44, and the exhaust gas inlet side (left side) of the exhaust gas purification device 50 is covered by the partition plate body 65. Therefore, not only the influence of the heat of the exhaust gas purification device 50, which is a heat generating body, on the cab 10 can be suppressed, but also the cooling air flowing in the engine room 43 can be guided to the opening portion on the side of the feeder room 31 to prevent the exhaust heat air from being accumulated in the engine room 43, and the cooling effect in the engine room 43 can be improved.

The exhaust gas inlet side of the exhaust gas purification device 50 is configured such that: projects from the left side surface of the side pillar 15 toward the supply chamber 31 of the harvesting device 3. Further, since the protruding portion of the exhaust gas purification apparatus 50 protruding from the side pillar 15 is covered with the partition plate body 65 protruding from the left side surface of the side pillar 15, it is possible to prevent the air heated by the heat discharged from the engine 20 and the exhaust gas purification apparatus 50 from spreading to the cab 10, and also prevent the operator from coming into contact with a high temperature member such as the exhaust gas purification apparatus 50 which is a heat generating body.

The partition plate body 65 includes: a bottom plate 65b that covers the upper side of the cavity 65 a; and a back plate 65c that covers the front of the cavity 65a, and the bottom plate 65b is provided with: extends obliquely downward toward the feed chamber 31 (left side), and at the same time, extends obliquely upward toward the rear. The pedal 10a of the cab 10 is stretched over a cab support frame 70 erected from the travel machine body 1. One end (rear end) of the column support beam frame 66 is coupled to the left side column frame 71, and the other end (front end) is coupled to the cab support frame 70 via the column support column frame 68. Further, the middle portion of the column support beam frame 66 is coupled to the transmission case 42 via a transmission case coupling frame 69.

As shown in fig. 10, 11, and the like, the bottom surface of the electric component box 18 is supported by the upper portions of a pair of left and right pillar frames 71 that are part of the engine room frame, and is fixed to a position behind the engine room cover 44. The air cleaner 49 supported by the pillar frame 71 is disposed below the electric component box 18. The pair of left and right pillar frames 71 respectively support the beam frames 71a and 71b extending in the left-right direction at the middle portion in a cantilever manner, and connect the beam frames 71a and 71b together. That is, the beam frames 71a, 71b of the pair of left and right pillar frames 71 are configured as beams between the pillar frames 71, and the air cleaner 49 is supported by one of the beam frames 71a, 71b (the right beam frame 71b in the present embodiment).

The electrical component box 18 is disposed above the air cleaner 49 provided behind the engine room 43, and is not directly affected by heat discharged from the engine 20 and the exhaust gas purification apparatus 50. That is, since the air cleaner 49 is disposed between the electric component box 18 and the engine 20, the electric component box 18 can be prevented from being heated by heat discharged from the inside of the engine room 43, and the electronic components mounted inside the electric component box 18 can be protected.

The operation device box 17 as a part of the driving operation unit is disposed adjacent to the left side (threshing device 5 side) of the electric component box 18. The electrical component box 18 and the operation element box 17 which are disposed adjacent to each other on the left and right are connected to each other. The operation element box 17 is connected to the upper end of the left side stay frame 71 and the right side surface of the threshing device 5, and is supported and arranged at a position rearward of the side stay 15. The threshing device 5 includes a front support frame 127 that connects the front of the right side surface of the threshing device 5 and the left side stay frame 71, and the lower left end of the operation element box 17 is connected to a connection portion of the front support frame 127 to the threshing device 5.

As shown in fig. 9 to 11, in the engine room 43, the diesel engine 20 is disposed: the engine output shaft 20a is supported by the traveling machine body 1 along the left-right direction in a vibration-proof manner by the engine mount 41. As shown in fig. 11 to 20, the intake manifold 19 is disposed on one side surface (rear side surface) of a cylinder head 91 of the diesel engine 20. The cylinder head 91 is mounted on a cylinder block 92 having an output shaft 20a and a piston (not shown) built therein. The exhaust manifold 83 is disposed on the other side surface (front side surface) of the cylinder head 91. That is, the intake manifold 19 and the exhaust manifold 83 are disposed separately on both side portions of the diesel engine 20 with the output shaft 20a interposed therebetween. The output shaft 20a protrudes from both left and right side surfaces of the cylinder block 92 toward the left and right outer sides.

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 structure is as follows: the driving force of the diesel engine 20 is taken out toward the transmission case 42 from the left end side of the output shaft 20a that axially supports the flywheel 94. 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 (see fig. 8 and 9) is provided so as to face the cooling fan 48.

That is, in the diesel engine 20, the cooling fan 48 is disposed at one side portion (the right side surface side of the cylinder block 92) intersecting the output shaft 20a, and the flywheel 94 is disposed at the other side portion (the left side surface of the cylinder block 92) opposite to the one side portion intersecting the output shaft 20 a. The exhaust gas intake side (exhaust gas inlet side) of the exhaust gas purification device 50 is located near the flywheel 94, and the exhaust gas extraction side (exhaust gas 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 is blown to the exhaust gas extraction side (exhaust gas outlet side) of the exhaust gas purification device 50 through which the exhaust gas after the purification treatment passes, thereby lowering the temperature of the exhaust gas after the purification treatment. The exhaust gas intake side (exhaust gas inlet side) through which the exhaust gas passes before the purification treatment in the exhaust gas purification device 50 is distant from the cooling fan 48, and the cooling air is hard to blow thereto. Therefore, the exhaust gas before the purification treatment is kept at a high temperature, and the purification performance of the exhaust gas purification device 50 can be appropriately maintained. Further, the temperature of the exhaust gas after the purification treatment can be lowered and discharged to the outside, and thus, for example, ignition of straw chips in the field can be prevented.

An exhaust gas recirculation device (EGR device) 96 for taking in exhaust gas for recirculation is disposed in the intake manifold 19. The air cleaner 49 is connected to the intake manifold 19 via a compressor casing 107 of a turbocharger 105 and an exhaust gas recirculation device 96, which will be described later. The fresh air (outside air) sucked into the air cleaner 49, subjected to dust removal and purification is sent to the intake manifold 19 via the compressor casing 107 of the turbocharger 105 and the exhaust gas recirculation device 96, and is supplied to each cylinder of the diesel engine 20.

In the above configuration, a part of the exhaust gas discharged from the diesel engine 20 to the exhaust manifold 83 flows back to each cylinder of the diesel engine 20 via the exhaust gas recirculation device 96 and the intake manifold 19. Therefore, the combustion temperature of the diesel engine 20 is lowered, 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 and a common rail 99 connected to a fuel tank (not shown) are connected to each injector 97 of the diesel engine 20. A common rail 99 and a fuel filter 100 are disposed on the cylinder head 91 on the side where the intake manifold 19 is provided, and a fuel pump 98 is disposed below the intake manifold 19 in the cylinder block 92. Each injector 97 has a fuel injection valve of an electromagnetic opening/closing control type (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 is supplied to the inside of 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 pressure-fed to the common rail 99 by the fuel pump 98, and the fuel is accumulated as high-pressure fuel in the common rail 99. The high-pressure fuel in the common rail 99 is injected into each cylinder of the diesel engine 20 by opening and closing the fuel injection valve of each injector 97. That is, the fuel injection pressure, the injection timing, and the injection period (injection amount) of the fuel are controlled with high accuracy by electronically controlling the fuel injection valve of each injector 97. 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 91 and above the exhaust manifold 83. The turbocharger 105 includes: a turbine case 106 having a turbine built therein, and a compressor case 107 having a blower wheel built therein. The exhaust gas intake side of the turbine case 106 is connected to the exhaust manifold 83. An exhaust gas 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 to the outside of the harvester through the turbocharger 105, the exhaust gas purification device 50, and the like.

The supply air intake side of the compressor case 107 is connected to the supply air intake side of the air cleaner 49 via an air supply pipe 108. The intake air extraction side of the compressor casing 107 is connected to the intake manifold 19 via a booster duct and the exhaust gas recirculation device 96. That is, the fresh air subjected to dust removal and purification by the air cleaner 49 is sent from the compressor casing 107 to the exhaust gas recirculation device 96 via the supercharging tube, and then is supplied to each cylinder of the diesel engine 20.

In order to purify the exhaust gas discharged from each cylinder of the diesel engine 20, an exhaust gas purification device 50 (diesel particulate filter (DPF)) for removing particulate matter from the exhaust gas of the diesel engine 20 is provided. An oxidation catalyst 111 and a soot filter 112 are provided in the exhaust gas purification device 50. The exhaust gas discharged from each cylinder of the diesel engine 20 to the exhaust manifold 83 is discharged to the outside of the harvester through the exhaust gas purification device 50 and the like. The structure is as follows: carbon monoxide (CO), Hydrocarbon (HC), Particulate Matter (PM), and nitrogen oxide (NOx) in the exhaust gas of the diesel engine 20 are reduced by the exhaust gas purification device 50.

The exhaust gas purification device 50 is configured to: a horizontally long elongated cylindrical shape extending long in a direction parallel to the output shaft 20a (crankshaft) of the diesel engine 20 in plan view. An exhaust gas inlet pipe 81 for taking in exhaust gas is provided in the exhaust gas purification device 50 at a position near the flywheel 94, and an exhaust gas outlet pipe 82 for discharging the exhaust gas after the purification treatment is provided in the exhaust gas purification device 50 at a position near the cooling fan 48. One end side in the exhaust gas moving direction and the other end side in the exhaust gas moving direction of the exhaust gas purification device 50 are detachably supported by the left and right side surfaces of the cylinder head 91 via the left leg body 113 and the right 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 leg body 113 and the right leg body 114. The exhaust gas purification device 50 is positioned above the exhaust manifold 83 in a state where the longitudinal direction of the cylindrical exhaust gas purification device 50 is oriented in the left-right direction of the diesel engine 20.

As shown in fig. 13 to 15, the exhaust gas intake side (exhaust gas inlet side) of the exhaust gas purification device 50 is located below the partition body 65, and the exhaust gas extraction side (exhaust gas outlet side) of the exhaust gas purification device 50 is located below the engine room cover 44. 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. The exhaust gas inlet pipe 81 of the exhaust gas purification device 50 is connected to the exhaust manifold 83 of the diesel engine 20 via the turbine case 106 of the turbocharger 105, and the exhaust gas inlet pipe 81 and the exhaust manifold 83 are thereby communicated. A tail pipe 84 extends between the threshing device 5 and the grain tank 7, and the exhaust outlet pipe 82 communicates with the tail pipe 84. The exhaust gas discharged from the exhaust manifold 83 of the diesel engine 20 is discharged from the exhaust gas purification apparatus 50 to the outside of the harvester through a tail pipe 84.

The exhaust gas purification apparatus 50 is disposed so as to extend from below the side pillar 15 toward the supply chamber 31, and a partition plate body (heat insulation plate body) 65 is stretched under the side pillar 15. The partition plate body 65 is disposed at a height position near the double-structure portion of the engine room cover 44. Therefore, the wires or the harnesses on the side of the side column 15 can be easily protected by the partition plate body 65 as a heat insulating plate body for heating the exhaust gas purification device 50 and the like. Further, it is possible to prevent exhaust gas from flowing toward the operator of the driver seat 10b from the guide grooves of the

levers

12, 13, 14a, 14b, etc., which are open in the operation panel body on the upper surface of the side pillar 15.

As shown in fig. 16 to 21, the exhaust outlet pipe 82 is bent toward the center side in the left-right direction of the travel machine body 1, and is bent toward the rear below the partition plate body 65 (near the inlet between the thresher 5 and the grain tank 7). That is, the exhaust outlet pipe 82 has an S-shape in plan view.

Therefore, the exhaust gas purification device 50 and the longitudinal middle portion of the exhaust outlet pipe 82 are adjacent to each other so as to extend in parallel to the axial direction of the output shaft 20a of the diesel engine 20 in a plan view. The rear end side of the exhaust outlet pipe 82 communicates with the front end side of the tail pipe 84.

The exhaust outlet pipe 82 is supported by the left leg body 113 for supporting the exhaust gas purifying device 50 via the outlet pipe support bracket 115. The outlet pipe support bracket 115 is configured to include: a relay bracket 116 extending upward from a rear middle portion of the left leg 113; and a coupling bracket 117 extending from the upper end of the relay bracket 116 toward the inside (right side) of the engine room 43. The outlet pipe support bracket 115 is connected to the bent portion of the exhaust outlet pipe 82 at the upper edge of the connecting bracket 117 to support the exhaust outlet pipe 82.

As shown in fig. 5 to 15, etc., the tail pipe 84 discharges the exhaust gas rearward and upward from between the thresher 5 and the grain tank 7. The tail pipe 84 is bent downward at its front end, the tail pipe 84 extends upward at its middle portion, and the tail pipe 84 is bent rearward at its rear end above the rear portion of the crawler 2. That is, the tail pipe 84 has a crank shape in side view. The tail pipe 84 opens rearward and obliquely downward at the rear end side. The tail pipe 84 is provided so that its rear end opening portion extends rearward and leftward so as to face the threshing device 5. The tail pipe 84 has an inner diameter at the exhaust inlet on the front end side thereof formed larger than an outer diameter at the exhaust outlet on the rear end side of the exhaust outlet pipe 82. The exhaust inlet of the tail pipe 84 is fitted to the exhaust outlet of the exhaust outlet pipe 82 in a loose fit. Therefore, the outside air is drawn by the negative pressure from the gap between the exhaust outlet of the exhaust outlet pipe 82 and the exhaust inlet of the tail pipe 84 into the tail pipe 84.

As shown in fig. 15 to 23, the tail pipe 84 is composed of a double pipe of an inner pipe 84a and an outer pipe 84b, the outside of the inner pipe 84a and the inside of the outer pipe 84b are connected by a plurality of spacers 84c, and the inner pipe 84a is fixed to the inside of the outer pipe 84 b. At the tip (exhaust inlet) of the tail pipe 84, the inner pipe 84a protrudes from the outer pipe 84b, 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. The inner pipe 84a extends to a middle portion of the outer pipe 84b in the exhaust gas moving direction. As a result, the exhaust gas flows from the exhaust outlet pipe 82 into the tail pipe 84, and the outside air flows from the gap between the exhaust outlet pipe 82 and the tail pipe 84, thereby cooling the exhaust gas flowing in the tail pipe 84 by the outside air.

The tail pipe 84 is supported by the left pillar frame 71 via a tail pipe support bracket 118. The tail pipe support bracket 118 is coupled to the inner pipe 84a and the outer pipe 84b of the tail pipe 84, respectively, and is coupled to an intake/exhaust path support frame 122 branching from the left pillar frame 71, thereby supporting the tail pipe 84 on the left pillar frame 71. The intake/exhaust path support frame 122 is positioned rearward and leftward of the left pillar frame 71, and extends upward from a middle portion of the left pillar frame 71 so as to be parallel to the left pillar frame 71.

The tail pipe support bracket 118 is formed in an L-shape, and includes: a connecting plate (first connecting portion) 119 extending in the vertical direction; and a coupling pipe (second coupling portion) 120 extending forward from the lower end of the coupling plate 119. The tail pipe 84 has a middle portion of the outer pipe 84b welded to the upper end of the coupling plate 119, and the middle portion of the coupling plate 119 is coupled to the intake/exhaust path support frame 122 via the relay plate 121. The distal end of the inner tube 84a is welded and fixed to the distal end of the connecting tube 120. The tips of the inner pipe 84a and the outer pipe 84b of the tail pipe 84 are connected together by a plurality of spacers 84c, and the inner pipe 84a is fixed to the tail pipe support bracket 118 by connecting one spacer 84c to the connecting pipe 120.

The tail pipe 84 is fixed to the pillar frame 71 via a tail pipe support bracket 118, and the exhaust outlet pipe 82 is fixed to the engine 20 via an outlet pipe support bracket 115. That is, the exhaust outlet pipe 82 and the tail pipe 84 which are separately connected can be supported by the engine 20 and the traveling machine body 1 which are of the same vibration system as the exhaust outlet pipe 82 and the tail pipe 84, respectively. Therefore, the exhaust outlet pipe 82 and the tail pipe 84 are not affected by other vibration systems, and breakage or failure can be prevented. Further, since the tail pipe 84 is separated from the vibration system of the diesel engine 20, the possibility of breakage of the tail pipe 84 due to the difference in the vibration frequency between the diesel engine 20 side and the traveling machine body 1 side can be further suppressed.

By configuring the tail pipe support bracket 118 to have an L-shape, the tail pipe 84 can be fixed so that the exhaust inlet extends into the engine room 43, and the high-temperature exhaust gas discharged from the exhaust outlet pipe 82 can be sufficiently cooled and discharged to the outside at the tail pipe 84. The inner pipe 84a and the outer pipe 84b are fixed by the tail pipe support bracket 118, respectively, and thus the relative position of the inner pipe 84a with respect to the outer pipe 84b can be maintained and supported.

Further, since the inner pipe 84a and the outer pipe 84b are fixed separately at both end positions of the tail pipe support bracket 118, the double pipe structure of the tail pipe 84 can be supported with high rigidity. The outer pipe 84b is coupled to the coupling plate 119 at a position facing the exhaust outlet portion of the inner pipe 84a, and thereby the exhaust outlet portion of the inner pipe 84a is fixed by the coupling plate 119 via the spacer 84 c. Therefore, the tail pipe support bracket 118 supports both ends of the inner pipe 84a extending to the middle of the inside of the outer pipe 84b, and the inner pipe 84a and the outer pipe 84b can be fixed so as to be coaxial in cross section.

The tailpipe support bracket 118 is fixed to the back surface side of the intake/exhaust path support frame 122 via a relay plate 121. The coupling plate 119 of the tail pipe support bracket 118 has elongated adjustment holes vertically aligned in the vertical longitudinal direction, and the tail pipe support bracket 118 is fastened and coupled to the relay plate 121 by bolts so that the vertical mounting position can be adjusted. The relay plate 121 is formed with elongated adjustment holes vertically aligned in the left-right longitudinal direction, and the relay plate 121 is fastened and coupled to the intake/exhaust path support frame 122 by bolts so that the left-right mounting position can be adjusted. Therefore, by adjusting the fastening position of tail pipe support bracket 118 and relay plate 121, the support position of tail pipe 84 can be easily adjusted, and machining errors and assembly errors can be absorbed. Further, an adjustment long hole that is long in the left-right direction may be provided in the linking plate 119, while an adjustment long hole that is long in the up-down direction may be provided in the relay plate 121.

The air cleaner 49 communicates with a precleaner 85 as a fresh air introduction section that takes in air from the outside. The prefilter 85 is disposed between the thresher 5 and the grain tank 7 in the same manner as the tail pipe 84, and extends above the thresher 5 and the grain tank 7. The prefilter 85 is fixed to the front surface of the winnowing conveyor 60 by a prefilter support bracket 126, and the prefilter 85 is disposed in front of the winnowing conveyor 60. The lower end (intake air outlet) of the prefilter 85 is connected to the upper end (intake air inlet) of an intake pipe 87 made of a metal pipe (iron pipe) via a bellows 86.

The intake pipe 87 is provided to extend in the vertical direction at a position on the right side (the cab 10 side) of the tail pipe 84, and is connected to a prefilter 85 disposed above the threshing device 5 via a bellows 86 provided to extend in the vertical direction. That is, the intake passage of the diesel engine 20 is disposed closer to the driver seat 10b than the exhaust passage, and the intake pipe 87 in a portion of the intake passage closer to the exhaust passage is formed of a metal pipe. The intake duct 87 is disposed behind the operation element box 17 behind the side pillar 15, and is supported by the left pillar frame 71 together with the tail duct 84. That is, the operation element box 17 is disposed behind the side pillar 15 and in front of the tail pipe 84 and the intake pipe 87.

With this configuration, the operator box 17 and the intake duct 87 are arranged between the driver seat 10b and the tail pipe 84. Therefore, the operator box 17 and the intake duct 87 can function as a heat insulating member that insulates heat discharged from the tail pipe 84 at the rear of the driver seat 10 b. Therefore, the hot air from the tail pipe 84 can be prevented from being transmitted to the operator seated in the driver seat 10 b. Further, since the intake pipe 87 is formed of a metal pipe, not only can deformation and the like due to the influence of heat from the tail pipe 84 be suppressed, but also the rigidity of the intake path can be ensured.

The intake pipe 87 is fixed to the left pillar 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 located at a height position substantially equal to the front end (exhaust inlet) of the tail pipe 84, and the upper end (intake inlet) of the intake pipe 87 is located at a height position substantially equal to the rear end (exhaust outlet) of the tail pipe 84. Further, the area of the intake pipe 87 in the vertical direction may be larger than the area of the tail pipe 84.

The intake pipe support bracket 123 is coupled to a middle portion of the intake pipe 87 and to the intake/exhaust path support frame 122 that branches from the left pillar frame 71, thereby supporting the intake pipe 87 on the left pillar frame 71. The intake pipe support bracket 123 is welded and fixed to the outer peripheral surface of the middle portion of the intake pipe 87, and is provided with bolt holes in the back surface thereof, and is fastened and connected to the relay plate 124 fixed to the intake/exhaust path support frame 122 by bolts. The relay plate 124 is welded and fixed to the upper end of the intake/exhaust path support frame 122, and a connection 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 at a position forward of the tail pipe support bracket 118.

The relay plate 124 is formed in a crank shape in plan view, and has a connection portion to the intake pipe support bracket 123 at the front and a connection portion to the relay plate 121 connected to the tail pipe support bracket 118 at the rear. That is, relay plate 124 is formed in a crank shape in plan view, and intake pipe support bracket 123 and tail pipe support bracket 118 can be fixed to each other in the front and rear directions of relay plate 124. Further, the relay plate 124 is provided with a connection portion with the intake pipe support bracket 123 extending leftward from the intake/exhaust path support frame 122, and is connected to the other end of a front support frame 127, one end of which is connected to the front of the right side surface of the thresher 5. The rear surface side of the relay plate 124 is connected to the other end of the rear support frame 128, and one end of the rear support frame 128 is connected to the rear side of the right side surface of the threshing device 5 and extends in the front-rear direction.

By supporting the intake pipe 87 and the tail pipe 84 together on the intake/exhaust path support frame 122, the support structure can be simplified, and the ease of assembly and maintenance of the intake/exhaust path of the engine 20 can be improved. Further, since the relative positions 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 the influence of heat between the intake gas and the exhaust gas can be easily reduced. The relay plate 124 coupled to the intake pipe support bracket 123 and the tail pipe support bracket 118 is coupled to be sandwiched in the front and rear direction by front and rear support frames 127 and 128 coupled to the front and rear direction of the threshing device 5, respectively. Therefore, the threshing device 5 can ensure the rigidity of the intake/exhaust path support frame 122, and can support the intake/exhaust path of the engine 20 with high rigidity.

In the intake path of the engine 20, an attenuator 88 for attenuating intake air noise from the prefilter 85 is provided 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 via an upstream intake relay pipe 89. The upstream-side intake relay pipe 89 has a U-shape in plan view, and is connected to an intake inlet on the left side surface of the attenuator 88 located forward of the intake pipe 87.

As shown in fig. 16 to 22, the attenuator 88 is supported in a cantilever manner by an attenuator support bracket 129 that is coupled to the left pillar frame 71 below the intake pipe support bracket 123, and the attenuator 88 is disposed behind the exhaust gas purification device 50 and at a position between the EGR device 96 and the tail pipe 84 of the engine 20 in a side view. The upstream-side intake relay pipe 89 is connected to the attenuator 88 by being bent and detoured below the tail pipe 84.

The attenuator 88 is disposed on the lower left side of the air cleaner 49, and the intake air outlet of the attenuator 88 communicates with the intake air inlet of the air cleaner 49 by a downstream intake air relay pipe 90. The intake relay pipe 90 is located below the air cleaner 49 and on the right side of the attenuator 88, is formed in an L-shape in front view, and connects the exhaust gas inlet side to the right side surface of the attenuator 88 and connects the exhaust gas outlet side to the lower surface of the air cleaner 49.

Further, 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 coupling bracket 117 of the outlet pipe support bracket 115 is disposed at the same height position as the attenuator 88, and the front surface of the attenuator 88 is covered with the coupling bracket 117 of the outlet pipe support bracket 115. Thus, the attenuator 88 is less likely to receive radiant heat from the exhaust gas purification apparatus 50. Since the coupling bracket 117 of the outlet pipe support bracket 115 is configured to have a wide width in the left-right direction (the same direction as the output shaft 20a of the engine 20) similarly to the rear panel 65c of the partition plate body 65, the cooling air passing through the engine compartment 43 can be guided to the feed chamber 31 side of the harvesting device 3, and the cooling air can be prevented from staying in the engine compartment 43.

In the engine compartment 43, the air cleaner 49 and the attenuator 88 are disposed on the left and right sides in a plan view, and the intake duct 87 and the attenuator 88 are disposed in the front and rear directions in a plan view. Therefore, the components of the intake path of the engine 20 can be arranged efficiently and compactly, and therefore, the intake path can be shortened. In the engine compartment 43, the air cleaner 49 and the attenuator 88 are disposed adjacent to each other on the left and right sides across the exhaust outlet pipe 82 at the rear of the exhaust gas purification device 50. Therefore, in the engine room 43, it is possible to suppress the influence of heat from the exhaust gas purification device 50, which is a high-temperature heat generator, on the components constituting the intake path of the engine 20, and to improve the arrangement efficiency of the components constituting the intake and exhaust system of the engine 20.

Although the cab 10 has been described as an example of the roof opening type combine in the above embodiment, the present invention may be applied to a combine in which a cab 10x having a cab seat 10b mounted therein is mounted as the cab 10 as shown in fig. 24 to 26. The combine shown in fig. 24 to 26 is configured as follows: an engine room 43 is formed below the cab 10x, and the exhaust gas purification device 50 in the engine room 43 can be visually checked from the upper surface side of the supply chamber 31. Further, as in the above-described embodiment, the intake path and the exhaust path of engine 20 are disposed behind cab 10x, and tail pipe 84 and intake pipe 87 are collectively supported by an engine frame that supports cab 10 x.

The structure of each part in the invention of the present application is not limited to the illustrated embodiment, and various modifications can be made without departing from the scope of the invention of the present application. Hereinafter, an embodiment embodying the combine harvester according to the present invention will be described with reference to the drawings. In the following description, the left side when facing the traveling machine body 1 in the forward direction is simply referred to as the left side, and similarly, the right side when facing the forward direction is simply referred to as the right side. A combine harvester according to an embodiment will be described with reference to fig. 1 to 4. As shown in fig. 1 to 4, a traveling machine body 1 supported by a pair of left and right traveling crawler belts 2 (traveling unit) is provided. A cutting unit 3 for cutting and taking in the ear stem while cutting is mounted on the front part of the traveling machine body 1 by a single-acting hydraulic cylinder 4 for elevation so as to be adjustable in elevation around a cutting pivot shaft 4 a. The traveling machine body 1 is mounted with: a threshing device 5 having a threshing cylinder 51; and a grain tank 7 for storing the threshed grains. The threshing device 5 is disposed on the left side in the forward direction of the traveling machine body 1, and the grain tank 7 is disposed on the right side in the forward direction of the traveling machine body 1. (refer to fig. 3).

Description of the reference numerals

1 traveling body

3 cutting device

5 threshing device

7 grain box

15 side column

16-lever switch

17 operation parts box

18 electric component box

20 diesel engine

31 feeding chamber

43 Engine room

44 engine room cover

49 air filter

50 waste gas purifying box

65 dividing board body (Heat insulation board)

65a cavity part

65b bottom plate

65c back plate

66-column support beam frame

82 exhaust outlet pipe

84 tail pipe

84a inner pipe

84b outer tube

84c spacer

85 prefilter

86 corrugated pipe

87 air inlet pipe

88 attenuator

113. 114 foot body

115 outlet pipe support bracket

116 Relay cradle

117 connecting bracket

118 tailpipe support bracket

119 connecting plate

120 connecting pipe

121 relay board

122 intake exhaust path support frame

123 air inlet pipe supporting bracket

124 relay board

125 packing auger support

126 prefilter support bracket

127 front support frame

128 rear support frame

129 attenuator support bracket

Claims

1. A combine harvester is provided with:

the cutting device is used for cutting the non-harvested ear stalks in the field; a threshing device that threshes the cut ear stalks cut by the cutting device; a traveling machine body provided with the harvesting device and the threshing device; an engine provided in an engine room on the traveling machine body; and an operation unit disposed above the engine room,

the combine-harvester is characterized in that,

the harvesting device is provided with a feeding chamber communicated with a threshing opening at the front part of the threshing device, the engine is provided with an exhaust gas purification device for purifying exhaust gas,

a cab operation portion provided in the cab portion is disposed adjacent to the feed chamber, and a cavity portion that communicates from the engine room toward the feed chamber is provided below the cab operation portion, a part of the cavity portion being open above the feed chamber,

the combine harvester also has: a partition plate covering the upper and front sides of the cavity; and an engine room cover disposed above the engine room, the engine room cover and the partition plate being disposed above the engine room in a left-right arrangement.

2. A combine harvester according to claim 1,

the driving operation part is provided with an operation part on the upper surface, and a link mechanism connected with the operation part is arranged in the space above and in front of the separation plate,

the partition plate protrudes toward the feed chamber side, and a heat insulating material is attached to a surface covering the cavity.

3. A combine harvester according to claim 2,

an exhaust gas inlet side of the exhaust gas purification device is disposed so as to protrude from the driving operation unit toward the supply chamber side, and a front surface and an upper surface of the exhaust gas purification device are covered with the partition plate.

4. A combine harvester according to claim 2 or 3,

the partition plate includes: a bottom plate that covers an upper portion of the cavity; and a back plate for covering the front of the cavity,

the bottom plate is configured to: extends obliquely downward toward the harvesting device and, at the same time, extends obliquely upward toward the rear.

5. A combine harvester according to claim 4,

the disclosed device is provided with: an exhaust gas purification device support bracket having one end coupled to a cylinder head of the engine to support the exhaust gas purification device; and an exhaust pipe support bracket coupled to the exhaust gas purification device support bracket and extending upward to support an exhaust gas outlet pipe of the exhaust gas purification device,

the exhaust pipe support bracket is disposed in parallel with the rear panel of the partition panel with the exhaust gas purification device interposed therebetween.

6. A combine harvester according to claim 5,

an air cleaner and an attenuator supported by the engine room frame are provided in an intake path of the engine,

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.