CN111373921A

CN111373921A - Harvester

Info

Publication number: CN111373921A
Application number: CN201911344863.XA
Authority: CN
Inventors: 馆野裕介; 猿渡贤治; 上北千春; 松本健太
Original assignee: Kubota Corp
Current assignee: Kubota Corp
Priority date: 2018-12-25
Filing date: 2019-12-24
Publication date: 2020-07-07
Also published as: CN116034718A

Abstract

The invention relates to a harvester. It is desirable to be able to discharge the exhaust gas of the engine in a state where the exhaust gas of the engine smoothly flows in the exhaust pipe and easily diffuses outward at an early stage. The harvester is provided with: a threshing device (7) for threshing the harvested rice straws; a grain tank (9) for storing grains obtained by the threshing process; an engine (5) located at the front side of the grain tank (9); and an exhaust pipe (53) which guides the flow of exhaust gas from the engine (5) introduced from the inlet portion on one end side and discharges the exhaust gas from an exhaust port (81) on the other end side to the outside, wherein the exhaust pipe (53) extends linearly in a rear and upper inclined posture between the threshing device (7) and the grain tank (9), and the exhaust port (81) on the rear end is positioned on the front side of the rear end of the grain tank (9).

Description

Harvester

Technical Field

The present invention relates to a harvester such as a combine harvester, and more particularly to a harvester having an engine at a front portion of a machine body and configured to discharge exhaust gas from the engine to the outside of the machine body through an exhaust pipe.

A second aspect of the present invention relates to a harvester such as a combine harvester, and more particularly to a harvester including an open-top cab provided on a rear side of a harvesting unit in a front portion of a body, a threshing unit for threshing crops and a grain storage unit for storing grains obtained by the threshing process, the threshing unit being disposed in a horizontal arrangement, and an engine being housed below the cab.

Background

Regarding the first aspect, in the related art, there is a combine harvester as an example of the harvester, including: a threshing device is provided in a state of being arranged in a left-right direction, an exhaust pipe is provided between the threshing device and a grain tank, a region on an upstream side in a flow direction of the exhaust pipe is set in a rear-upper inclined posture of a steep slope, a region on a downstream side in the flow direction is set in a rear-upper inclined posture of a gentle slope, a curved portion is formed in the middle of a flow path, and a portion near an exhaust port is also formed in a curved shape so that a discharge direction is directed toward the threshing device side (for example, see patent document 1).

Prior art documents

Patent document

Patent document 1: japanese patent laid-open publication No. 2017-38576

Problems to be solved by the invention

In the above-described conventional structure, since the exhaust pipe has the bent portion formed in the middle of the flow path, the exhaust gas introduced from the inlet portion of the exhaust pipe and flowing to the exhaust port is bent in the flow direction at the bent portion, and therefore, flow resistance such as disturbance of the flow of the exhaust gas may be increased to prevent smooth flow of the exhaust gas. Further, since the exhaust port is also curved at a portion close to the exhaust port, the exhaust gas discharged from the exhaust port has a weak potential and is hard to diffuse into the atmosphere, and there is a disadvantage that the exhaust gas is accumulated at a position close to the grain tank.

As for the second aspect, among the above-described harvesters, there has conventionally been a harvester in which a precleaner for sucking combustion air supplied to an engine is provided at a high position on the rear side of the machine body between the threshing device and the grain storage unit (see, for example, patent document 2).

Prior art documents

Patent document

Patent document 2: japanese patent laid-open publication No. 2012-172582

Problems to be solved by the invention

In the above-described conventional configuration, the harvested straw is conveyed near the inlet of the threshing device by the harvesting operation to suspend straw chips and the like, and therefore, such dust is not scattered toward the precleaner. With such a configuration, since the pre-filter is located at a position away from the air filter provided in the vicinity of the engine, there are disadvantages such as a long air pipe, a large intake resistance, and a low intake efficiency.

To avoid such a disadvantage, the following structure may be considered: the pre-filter is arranged at a position close to the transverse outer side of the machine body in the area between the driving part and the grain storage part or at a position close to the threshing device side in the area between the driving part and the grain storage part.

However, during harvesting, non-harvested grain stalks are present at the outer part of the lateral side of the machine body. Therefore, in the configuration in which the precleaner is provided at a position laterally outward of the machine body in the region between the cab and the grain storage section, the possibility of dust generated from the non-harvested grain stalks as the harvesting operation is carried out scattering into the precleaner becomes high.

In addition, in the configuration in which the precleaner is provided at a position closer to the threshing device side in the region between the driver and the grain storage unit, the possibility that dust generated in the vicinity of the inlet of the threshing device as described above will scatter toward the precleaner increases. Recently, an exhaust gas treatment device for purifying exhaust gas of an engine is sometimes provided, and the exhaust gas treatment device is sometimes provided on the opposite side of the power unit from the radiator, that is, on the threshing device side. As a result, the prefilter is adversely affected by high heat generated from the exhaust gas treatment device.

Disclosure of Invention

Therefore, in the first aspect, it is desirable to discharge the exhaust gas of the engine in a state where the exhaust gas of the engine smoothly flows in the exhaust pipe and easily diffuses outward at an early stage.

Means for solving the problems

The harvester of the invention has the following characteristic structure:

the harvester is provided with: a threshing device for threshing the harvested grain stalks; a grain tank that is arranged in a transverse direction of the threshing device and stores grains obtained by the threshing process; an engine located on the front side of the grain box; and an exhaust pipe that guides the flow of the exhaust gas of the engine introduced from the inlet portion on one end side and discharges the exhaust gas to the outside from the exhaust port on the other end side, wherein the exhaust pipe extends linearly in a rear and upper inclined posture between the threshing device and the grain tank, and the exhaust port is located on the front side of the rear end portion of the grain tank.

According to the present invention, since the exhaust pipe extends linearly in a rear-upper inclined posture, the exhaust gas of the engine introduced from the inlet portion on the one end side is smoothly guided along the linear flow path without disturbing the flow. Then, the exhaust port discharges the exhaust gas straight rearward along the longitudinal direction of the pipe. In addition, the exhaust port at the rear end of the exhaust pipe is located at a position closer to the front side than the rear end of the grain tank, so that the exhaust pipe can be miniaturized without causing an excessively long front-rear length. As a result, the exhaust pipe itself is not lengthened, and the exhaust gas flowing through the exhaust port is discharged outward with a good force, so that the exhaust gas is easily diffused in the air, and the exhaust gas is not accumulated at a position close to the grain tank.

Therefore, the exhaust gas of the engine can be smoothly flowed in the exhaust pipe and can be discharged outward in a state of being easily diffused without being accumulated.

In the present invention, it is preferable that an exhaust gas treatment device for purifying exhaust gas of the engine and sending the exhaust gas to the exhaust pipe is provided laterally of the engine.

According to this configuration, the exhaust gas discharged to the outside of the apparatus is purified, and the atmospheric pollution can be reduced as much as possible.

In the present invention, it is preferable that the exhaust gas treatment device is provided in a state of being positioned in front of the threshing device, the exhaust gas is introduced into the inlet portion of the exhaust pipe through a bent pipe, and the bent pipe forms a bent path so that an inflow direction of the exhaust gas is different from a discharge direction after passing.

According to this configuration, the exhaust gas discharged from the exhaust port of the exhaust gas treatment device can be discharged and guided in different directions without being restricted by the discharge direction from the exhaust port by using the bent pipe. As a result, even if the exhaust pipe is disposed between the threshing device and the grain tank in a rear-upper inclined posture, the exhaust gas treatment device can be installed in a rational and compact manner in the vacant region without being restricted by the installation posture of the exhaust gas treatment device.

In the present invention, it is preferable that a protruding portion protruding toward the threshing device side is formed at an upper portion of the grain box on the threshing device side, a recessed space recessed toward an inner side of the box is formed below the protruding portion, and the exhaust pipe passes through the recessed space.

According to this configuration, the protruding portion is formed in the cereal box, so that the cereal storage capacity can be increased, and the exhaust pipe can be compactly arranged by the recessed space formed below the protruding portion without enlarging the lateral width of the machine body.

In the present invention, it is preferable that a winnowing device for conveying grain obtained by the threshing device upward toward an inlet of the grain tank is provided between the threshing device and the grain tank, a longitudinally long concave portion into which the winnowing device enters is formed in a side surface of the grain tank on the threshing device side, the exhaust pipe includes a first exhaust pipe located on the engine side and a second exhaust pipe located on the exhaust port side, the first exhaust pipe and the second exhaust pipe are connected in a front-rear direction at a position corresponding to the concave portion, and a gap for introducing air is formed in a connecting portion between the first exhaust pipe and the second exhaust pipe.

According to this configuration, the connection portion between the first exhaust pipe and the second exhaust pipe is formed with a recess into which the winnowing device enters at a position facing the grain box side, and thus becomes an open space. As a result, low-temperature outside air can be efficiently sucked from the gap formed in the connection portion.

In the present invention, it is preferable that the air outlet is located at a position lower than an upper end of the grain box.

According to this configuration, the exhaust pipe does not have an excessively high height position, and can be prevented from coming into contact with, for example, a grain discharge conveyor moving above the grain box, an upper portion of a storage bin, and the like.

In the second aspect, it is desirable to suppress adverse effects of dust, high heat, and the like on the precleaner while preventing a decrease in intake efficiency of the combustion air with respect to the engine.

Means for solving the problems

The harvester of the invention has the following characteristic structure:

the harvester is provided with: a harvesting part which is arranged at the front part of the machine body and harvests crops; a crop conveying part which is arranged behind the harvesting part and conveys the harvested crops to the rear; an open-top cab provided behind the harvesting unit in a state of being arranged laterally to the crop conveying unit; a threshing part which is arranged behind the crop conveying part and is used for threshing the conveyed crops; a grain tank disposed behind the driving unit in a state of being arranged in a transverse direction to the threshing unit, for storing grains obtained by the threshing process; and a power unit which is provided below the driving unit and accommodates the engine, wherein the driving unit includes a driving seat and a side panel which is positioned on the crop conveying unit side in the left-right direction with respect to the driving seat, the power unit includes an exhaust gas treatment device which treats exhaust gas of the engine, an exhaust pipe which guides the exhaust gas treated by the exhaust gas treatment device extends rearward and upward between the threshing unit and the grain tank, and a pre-filter is provided at a position directly behind the driving seat and at a position between the driving seat and the grain tank which is higher than the driving seat.

According to the present invention, since the exhaust gas of the engine provided below the cab is guided to the rear upper side of the machine body through the exhaust pipe after being treated by the exhaust gas treatment device and discharged to the outside of the machine, the region between the cab and the grain storage unit is not adversely affected. However, since the exhaust gas treatment device causes high temperature around the device as it is treated, the device may be affected by heat in a region between the driver and the grain storage unit on the side of the threshing device.

Therefore, the pre-filter adopts the following structure: the grain box is located between the driver seat and the grain box, and is located right behind the driver seat and is located higher than the driver seat. As a result, compared to a configuration in which the driving unit is provided at a position closer to the threshing device in the region between the driving unit and the grain storage unit, the exhaust gas treatment device can be separated from the exhaust gas treatment device, the side panel can block heat, the heat is less likely to be affected by the heat, and the possibility that dust generated in the vicinity of the inlet of the threshing device is scattered to the pre-cleaner is reduced. In addition, compared to the case where the dust collecting device is provided in the region between the driver and the grain storage portion, the dust generated from the unharvested grain stalks is less likely to scatter toward the precleaner.

Therefore, by arranging the precleaner at an appropriate position, it is possible to suppress adverse effects of dust, high heat, and the like on the precleaner while preventing a decrease in intake efficiency.

In the present invention, it is preferable that an air cleaner is provided at a position directly behind the driver seat, and the pre-cleaner is provided at a position directly above the air cleaner.

According to this structure, can effectively utilize vacant regional configuration prefilter and air cleaner between driver's seat and the cereal case to realize the improvement of holistic air intake efficiency, and, through with the mode configuration air cleaner and prefilter that overlaps in upper and lower direction, thereby can realize the compactification that sets up the space when overlooking.

In the present invention, it is preferable that the pre-filter and the air filter are connected by a straight pipe-shaped connection pipe.

According to this configuration, air is smoothly taken between the precleaner and the air cleaner, the intake resistance is reduced, and the intake efficiency can be further improved. Further, compared to the bent structure, the load on the mounting portion due to vibration of the body is also reduced, and the durability can be improved. Further, the device can be compactly arranged in the lateral direction, and the possibility of interference with other devices at the time of assembly or the like is reduced.

In the present invention, it is preferable that a pillar supporting a rear portion of the cab be provided so as to stand upright from a frame, and the pre-filter and the air filter be supported by the pillar.

According to this configuration, by supporting the pre-filter and the air filter on the same pillar, respectively, the supporting structure can be simplified as compared with a structure in which they are supported by pillars provided separately.

In the present invention, it is preferable that the pre-filter and the air filter are provided in a state of being positioned on a front side of the pillar.

According to this configuration, the support column supports the rear portion of the cab, for example, the rear end portion of the cover covering the upper side of the power unit. Since the pre-filter is positioned on the front side of the pillar with respect to the air filter, the pre-filter can be disposed by effectively utilizing a vacant region on the upper side of the cover and on the rear side of the driver's seat.

In the present invention, it is preferable that a dust-proof case that allows air to flow into the power unit and restricts air from being discharged is provided at a portion facing the outside in the lateral direction of the power unit, and the pre-filter is provided in a state where the suction port is positioned between an upper end portion of the grain tank and an upper end portion of the dust-proof case in a side view.

According to this configuration, air is sucked in laterally outward of the dust-proof case, and at a position above the upper end portion of the grain tank, for example, a lateral conveying portion of the grain discharging device may pass through or dust scattered from the outside may pass through. Therefore, the suction inlet of the pre-filter is arranged between the upper end of the grain box and the upper end of the dustproof shell. According to this configuration, the pre-filter easily sucks in clean air with little dust and the like.

Drawings

The first embodiment:

fig. 1 is an overall side view of a combine harvester.

Fig. 2 is an overall plan view of the combine harvester.

Fig. 3 is a side view of the cab.

Fig. 4 is a plan view showing a part of the cab and the vicinity of the inlet of the threshing device.

Fig. 5 is a front longitudinal sectional view showing a part of the cab and the vicinity of the inlet of the threshing device.

Fig. 6 is a rear view of the cab.

Fig. 7 is a side view of the dust cover.

Fig. 8 is a perspective view showing a state of a subassembly of the air cleaner and the precleaner.

Fig. 9 is a side view showing an installation state of the exhaust pipe.

Fig. 10 is a sectional view of the exhaust pipe.

FIG. 11 is a front vertical sectional view showing the arrangement of the grain tank and the exhaust duct.

Fig. 12 is an overall side view of the combine harvester.

Fig. 13 is an overall plan view of the combine harvester.

Fig. 14 is a side view of the cab.

Fig. 15 is a plan view showing a part of the cab and the vicinity of the inlet of the threshing device.

Fig. 16 is a front longitudinal sectional view showing a part of the cab and the vicinity of the inlet of the threshing device.

Fig. 17 is a rear view of the cab.

Fig. 18 is a side view of the dust cover.

Fig. 19 is a perspective view showing a state of a subassembly of the air cleaner and the precleaner.

Fig. 20 is a side view showing an installation state of the exhaust pipe.

Fig. 21 is a sectional view of the exhaust pipe.

FIG. 22 is a front vertical sectional view showing the arrangement of the grain tank and the exhaust duct.

Description of the reference numerals

The first embodiment:

5 engines

7 threshing device

9 grain box

17 winnowing device

20 projecting part

21 concave space

22 concave part

50 exhaust gas treatment device

50a bending tube

53 exhaust pipe

80 entrance part

81 air outlet

84 connecting part

85 gap

Second embodiment:

1 machine frame

3 reaping part (harvesting part)

4 driving part

6 power part

7 threshing part

8 grain stalk conveying device (crop conveying part)

9 grain box

30 driver's seat

32 side panel

50 exhaust gas treatment device

53 exhaust pipe

58 dustproof shell

66 air filter

67 precleaner

67a suction inlet

68 first support (post)

75 connecting pipe

Detailed Description

The first embodiment:

the mode for carrying out the present invention is explained based on the drawings. In the following description, when the front-rear direction of the machine body is defined, the machine body is defined along the traveling direction of the machine body in the working state, and when the left-right direction of the machine body is defined, the left-right direction is defined in a state viewed from the traveling direction of the machine body. That is, the direction indicated by reference numeral "F" in fig. 1 and 2 is the front side of the body, and the direction indicated by reference numeral "B" in fig. 1 and 2 is the rear side of the body. The direction indicated by reference numeral "L" in fig. 2 is the left side of the body, and the direction indicated by reference numeral "R" in fig. 2 is the right side of the body.

[ integral structure of combine harvester ]

Fig. 1 and 2 show a half-feed combine harvester as an example of the harvester. In the combine harvester, a harvesting unit 3 as a harvesting unit for harvesting standing grain stalks is provided in front of a traveling machine body including a frame 1 and a pair of right and left crawler traveling devices 2. A driver 4 on which a driver rides is provided on the right side of the front part of the traveling machine body behind the harvesting unit 3. A power unit 6 for housing the engine 5 is provided below the driver unit 4. A threshing device 7 for threshing the harvested rice straws is arranged behind the harvesting part 3. A grain straw conveying device 8 as a crop conveying device for conveying the harvested grain straw from the harvesting unit 3 toward the threshing device 7 is provided across the harvesting unit 3 and the threshing device 7. The grain tank 9 for storing grains after threshing is disposed in a state of being arranged in the left-right direction with the threshing device 7.

The harvesting section 3 includes: a plurality of grain dividers 10 for dividing the vertical grain stalks of a plurality of planting strips located on a harvesting object, a plurality of grain lifting devices 11 for lifting the vertical grain stalks of the harvesting object, a push-shear type harvesting device 12 for cutting off the roots of the lifted vertical grain stalks and harvesting, and the like.

Although not shown, the straw transport device 8 transports the harvested straws so that the roots of the harvested straws are held and transported by the root holding transport device, the ear tip side of the harvested straws is held and transported by the holding and transporting mechanism, and the harvested straws are guided by the guide plate in a state where the ear tip is placed, and the harvested straws in the vertical posture are gradually laid down. The harvested straw is handed over to the feeding chain 16 of the threshing device 7.

The threshing device 7 is configured to grip and convey the roots of the harvested straws conveyed by the straw conveyor 8 by a supply chain 16, and has a threshing cylinder and a receiving net (not shown) on the upper side of an internal space surrounded by left and right side walls and a top plate, and forms a threshing chamber for performing threshing processing on the ear tip side of the harvested straws. The lower part of the threshing chamber is provided with a sorting part for sorting the threshed processing object leaked from the receiving net into secondary processing objects such as grains, rice with branches and stalks and straw scraps.

A winnowing device 17 composed of a screw conveyor is provided on the lateral outer side of the right side wall 7A of the threshing device 7 on the grain box 9 side. The grains separated by the separation section are discharged outside the lateral side of the grain box 9 side of the thresher 7 by a primary processed product recovery screw 18 provided at the lower portion of the separation section, and are sent to the winnower 17. Then, the grains are conveyed upward by the winnowing device 17 and stored in the grain box 9.

As shown in fig. 1 and 9, the upper portion of the grain raising device 17 is connected and fixed to the right side wall 7A of the threshing device 7 by a pair of front and rear connecting stays 19 each formed of a plate body having a substantially L-shape in plan view. One end of each of the pair of connecting stays 19 is connected to an outer peripheral portion of the winnowing device 17 by welding, and the other end is connected to the right side wall 7A of the threshing device 7 by a bolt.

As shown in fig. 11, a protruding portion 20 protruding toward the threshing device 7 is formed at an upper portion of the grain box 9 on the threshing device 7 side on the front side, and a concave space 21 recessed toward the box inner side is formed below the protruding portion 20. By providing the extension portion 20 in this way, the empty space above the threshing device 7 can be effectively utilized, and the grain storage capacity can be increased. As shown in fig. 2, a longitudinally long concave portion 22 into which the winnowing device 17 enters is formed at a position corresponding to the winnowing device 17 on the threshing device 7 side, that is, the left side surface of the grain box 9.

As shown in fig. 1 and 2, a grain discharging device 23 is provided for discharging grains in the grain tank 9 to the outside. The grain discharge device 23 includes: a spiral-conveying type vertical conveying part 24 for conveying the grains in the grain box 9 upwards, and a spiral-conveying type horizontal conveying part 25 for conveying the grains from the vertical conveying part 24 to the outside of the machine body. The grain discharging device 23 is configured to be capable of being operated by the electric motor 26 to revolve around the vertical axis (the axis of the vertical conveying section 24) Z1. The lateral transfer unit 25 is configured to be vertically swingable about a lateral axis X1 at the end on the side of the vertical transfer unit 24 by the hydraulic cylinder 27.

[ Driving part ]

The cab 4 is not covered with a cab or the like, and is opened upward. The steering unit 4 is provided beside the straw conveyor 8 (adjacent to the right) in front of the grain tank 9. As shown in fig. 2, the cab 4 includes a cab seat 30, a front panel 31, and a side panel 32.

The front panel 31 is provided with a manipulation lever 33, an information display unit 34, and the like. The operation lever 33 is operated to perform a steering operation of the traveling machine body, a lifting operation of the harvesting unit 3, and the like. The information display unit 34 displays various information such as a load state of the engine 5.

The side panel 32 is provided on the left side, which is the side where the straw conveyor 8 is located, in the left-right direction of the machine body with respect to the driver seat 30. The side plate 32 is provided with a main shift lever 35, an auxiliary shift lever 36, a clutch lever 37, and a grain discharge operation portion 38. As shown in fig. 2, 3 and 4, the main shift lever 35 and the sub shift lever 36 are disposed in a lateral arrangement on the front portion 32A of the side panel 32, the clutch lever 37 is disposed on the front-rear intermediate portion 32B of the side panel 32, and the grain discharge operation portion 38 is disposed on the rear portion 32C of the side panel 32.

The main shift lever 35 performs a shifting operation of the main transmission 28, which is a hydrostatic continuously variable transmission (HST), by a forward-backward swinging operation. The sub-shift lever 36 performs a shifting operation of a gear shift type sub-transmission device incorporated in the transmission by a back-and-forth swing operation. The clutch lever 37 switches a harvesting clutch (not shown) and a threshing clutch (not shown). The grain discharging operation unit 38 performs a rotation operation, a lifting operation, and a power transmission disconnection operation of the grain discharging device 23.

As shown in fig. 3, the side panels 32 extend from the front end to the rear end and have a shape protruding substantially like a box. The upper surface of the front portion 32A of the side panel 32 is set to the same height as the front panel 31. The upper surfaces of the front and rear intermediate portions 32B of the side panels 32 are set at a higher position than the front portions 32A, and the upper surfaces of the rear portions 32C of the side panels 32 are set at a higher position than the front and rear intermediate portions 32B.

With the above-described configuration, the clutch lever 37 provided in the front-rear intermediate portion 32B of the side plate 32 is provided at a high position, and therefore, even when the driver performs a driving operation while standing, the clutch lever 37 can be easily operated. Further, since the grain discharging operation part 38 provided in the rear part 32C of the side plate 32 is provided at a position higher than the clutch lever 37, when discharging grains, the grain discharging operation part 38 is easily operated when the driver performs an operation while viewing the rear of the machine body in a standing posture.

[ dustproof structure of threshing entrance ]

As shown in fig. 2, an inlet plate 45 is provided at a front portion of the threshing device 7, and the inlet plate 45 receives the ear tip side of the harvested straw delivered from the straw conveyor 8 and conveyed by the supply chain 16 while sandwiching the root side thereof between the inlet plate and the straw and guides the ear tip side of the harvested straw to flow down to the supply port 44, and is configured to supply the ear tip side of the harvested straw from the supply port 44 of the threshing device 7 to the inside of the threshing chamber while being received and guided by the inlet plate 45.

As shown in fig. 4 and 5, a dust cover K is provided near the supply port 44 of the threshing device 7, and blocks a gap formed between the side plate 32 and the straw conveyor 8, thereby preventing dust such as straw dust generated in association with harvesting work during threshing from falling downward from the gap.

The dust cover K is provided with: a top wall 47 covering the upper part of the gap in a state of protruding from the partition plate 46 toward the straw conveyor 8 side, and a vertical wall 48 extending in a vertical posture in a state of being continuous downward at the front side edge and the left side edge of the top wall 47. The connecting portion between the top wall portion 47 and the longitudinal wall portion 48 is connected in a smoothly continuous state without a step or a gap over substantially the entire region. With the above configuration, straw chips generated in association with the harvesting work are received by the dust cover K, and the received straw chips are guided and supplied to the inlet plate 45 side without being accumulated. Further, a notch 47a is formed in a rear left portion of the top wall portion 47 so that the support column 25B supporting the socket 25A is inserted therethrough, and the socket 25A receives and holds the lateral transfer portion 25 of the grain discharging device 23.

[ power section ]

As shown in fig. 2 and 6, the power unit 6 houses, in addition to the engine 5, an exhaust gas treatment device 50 that purifies exhaust gas from the engine 5, a radiator 51 that radiates heat from engine cooling water, a cooling fan 52 that cools the radiator 51, and the like. The radiator 51 is disposed laterally outward (rightward) of the body with respect to the engine 5.

The exhaust gas treatment device 50 performs a purification treatment of the exhaust gas of the engine 5 by a DPF (diesel particulate filter). As shown in fig. 1, 2, 4, and 5, the exhaust gas treatment device 50 is provided on the side of the power unit 6 closer to the straw conveyance device 8 than the driver's seat 30 in the left-right direction. To be described, the exhaust gas treatment device 50 is provided in a state of being positioned in front of the threshing device 7 and in a state of being positioned below the side plate 32 and below the dust cover K. The exhaust gas treatment device 50 is provided in a state in which the left-right range of the exhaust gas treatment device 50 overlaps with the left-right range of the part of the threshing device 7 on the grain tank 9 side (right side) and the longitudinal direction of the exhaust gas treatment device 50 is along the front-rear direction of the machine body. The upper side of the exhaust gas treatment device 50 is covered with the side panel 32 and the dust cover K, and the straw chips and the like do not fall on the exhaust gas treatment device 50.

An upward discharge pipe 50a is provided on the upper outer periphery of the exhaust gas treatment device 50 on the rear side. The discharge tube 50a of the exhaust gas treatment device 50 extends obliquely upward (obliquely upward right) toward the grain tank 9 (right side) in the left-right direction of the machine body. The exhaust pipe is configured to curve rearward at the middle portion and discharge the exhaust pipe 53. That is, the discharge cylinder 50a constitutes a bent pipe having a bent path so that the inflow direction of the exhaust gas is different from the discharge direction after passing. The exhaust gas discharged from the discharge cylinder 50a is guided to flow toward the rear of the engine body through the exhaust pipe 53 and discharged toward the rear of the engine body. The structure of the exhaust pipe 53 will be discussed in detail later.

As shown in fig. 2, 3, and 6, the power unit 6 is covered with a top plate 55 covering the upper side, a front plate 56 covering the front side, a rear plate 57 covering the rear side, and a dust-proof case 58 located on the right side. The top plate 55, the front plate 56, the rear plate 57, and the dust-proof case 58 are integrally coupled to each other, and are supported by the frame 1 so as to be rotatable (see an arrow in fig. 6) about a longitudinal axis X2 at a lower end between an appropriate attachment state (see fig. 6) and a horizontal open state (not shown). In an appropriately attached state, the top plate 55 is fixed to the side plate 32 by a lock mechanism, not shown, provided in the figure. The rear plate 57 has a left-right divided structure in which only the right side portion 57a is integrally rotatable and the left side portion 57b is fixedly supported.

The dust-proof case 58 is formed in a substantially hollow box shape having a wide width in the front-rear direction and a narrow width in the left-right direction, and has a porous air introduction portion 60 having a large area formed on an outer side surface and an inner side surface facing the driver seat 30 so that outside air is introduced as cooling air and straw chips and the like do not enter. An opening 61 for ventilation is formed in a portion of the inner side surface facing the heat sink 51.

As shown in fig. 6, a working oil cooler 62 for cooling the working oil by the cooling air blown by the cooling fan 52 and a fuel cooler 63 for cooling the fuel of the engine 5 are provided on the housing inner side (power unit side) of the dust cover 58 corresponding to the opening 61 for ventilation. As shown in fig. 7, the hydraulic oil cooler 62 and the fuel cooler 63 are mounted to the dust cover 58 in a state of being mounted in advance to a support frame 65 in which a plurality of stays 64 are connected in a rectangular frame shape.

In the support frame 65, as the plurality of stays 64, 2 vertical stays 64b are connected to the upper and lower portions across 2 vertical stays 64a in the front-rear direction at intervals. A large-sized hydraulic oil cooler 62 is mounted across 2 upper and lower longitudinal stays 64a, and a small-sized fuel cooler 63 is mounted across 2 upper and lower longitudinal stays 64 b. Both side ends of the upper and lower 2 longitudinal stays 64a are connected to the peripheral edge of the ventilation opening 61 formed in the inner side surface of the dust-proof case 58 by bolts. The 4 bolts Bo use standard bolts of the same kind. According to the structure described above, the assembly or disassembly of the operating oil cooler 62 and the fuel cooler 63 can be easily performed only by the 4 bolts Bo.

Therefore, the dust-proof case 58 has the following structure: the air intake from the right side portion of the power unit 6 is allowed in a state where the passage of dust is blocked by the operation of the cooling fan 52. Even when the operation of the cooling fan 52 is stopped, the opening 61 for ventilation of the dust-proof case 58 is covered with the hydraulic oil cooler 62, the fuel cooler 63, and the like, and therefore, the high-temperature air in the power unit 6 can be prevented from being discharged to the outside.

When the dust cover 8 is swung outward from the machine body and is switched to the lying open state, the power unit 6 is opened outward, and maintenance work of the power unit 6 can be easily performed. In the lying open state, the working oil cooler 62 and the fuel cooler 63 can be integrally removed by releasing the fixing of the support frame 65.

[ Structure for intake of engine ]

An air cleaner 66 for an engine and a precleaner 67 for the engine are provided behind the driver seat 30. As shown in fig. 1 and 2, an air cleaner 66 and a pre-cleaner 67 are provided at a front-rear middle portion between the driver seat 30 and the grain tank 9 arranged in the front-rear direction. The air cleaner 66 is formed in a substantially cylindrical shape, and is provided directly behind the driver seat 30 in a lateral posture such that the longitudinal direction thereof extends in the left-right direction.

The pre-filter 67 is disposed at a position directly above the air filter 66 and at a position higher than the driver seat 30 between the driver seat 30 and the grain tank 9. The air cleaner 66 and the precleaner 67 are connected by a straight pipe-shaped connecting pipe 75 extending in the vertical direction. The pre-filter 67 is provided in a state where the suction port 67a is positioned between the upper end of the grain tank 9 and the upper end of the dust-proof case 58 in a side view. To be described, the precleaner 67 is formed in a substantially cylindrical shape having an axis in the vertical direction, and the vertical dimension is shorter than the lateral width (diameter). The precleaner 67 is provided at a position directly behind the driver seat 30 in plan view, and is provided at a position where an axial center position in the vertical direction (a middle position of the lateral width) corresponds to a substantially center position of the lateral width of the driver seat 30.

As shown in fig. 1, 2, 6, and 8, a first support 68 that supports the rear portion of the cab 4 is provided in a state of being erected from the frame 1. A precleaner 67 and an air cleaner 66 are supported by the first support column 68. As shown in fig. 6, an attachment plate 69 welded to the lower end of the first stay 68 is coupled to the frame 1 by bolts. The first support column 68 is formed in a square tube shape and extends upward from the attachment plate 69. A second support 70 is provided on the left side of the first support 68. Like the first support column 68, the second support column 70 is fixed to the frame 1 by a bolt with a mounting plate 71 welded to the lower end portion thereof extending upward. The second leg 70 is formed shorter than the first leg 68.

A first mounting table 72 having a horizontal plate shape is fixed by welding at a position intermediate the upper and lower ends of the first stay 68. The air cleaner 66 is placed and supported on the first mounting base 72 and is fastened by bolts. A second mounting base 73 having a horizontal plate shape is welded and fixed to the upper end portion of the first support column 68. The second mount base 73 is connected by bolts with a support arm 74 that supports the precleaner 67 placed thereon.

At a position slightly below the first mount base 72 at a vertically intermediate position of the first support column 68, support brackets 76 each formed of an angle steel having a substantially L-shaped cross section are welded and fixed to each of the left and right side surfaces and the front side surface. The second support column 70 extends in the vertical direction to the same height as the height at which these support brackets 76 are provided, and a support bracket 77 made of angle steel is welded and fixed to the right side surface of the upper end portion thereof, and is provided in a state of extending rightward and sideward. A support bracket 78 made of angle steel is also welded and fixed to the front side surface of the second support column 70.

The right support bracket 77 of the second support column 70 and the left support bracket 76 of the first support column 68 are coupled by bolts. As shown in fig. 6, the left portion 57b of the rear plate 57 is connected to the right support bracket 77 of the second support column 70 and the right support bracket 76 of the first support column 68 by bolts, respectively. Similarly, the lower portion of the left side portion 57b of the rear plate 57 is also connected to the first support column 68 and the second support column 70 by bolts at appropriate locations.

As shown in fig. 6, the rear end portions of the side panels 32 are placed and supported on the support brackets 78 on the front side of the second support columns 70 and are fastened by bolts. Further, an upper support plate 79 constituting a part of the top plate 55 is connected to the right support bracket 76 and the front support bracket 76 of the first support column 68 and the right support bracket 77 of the second support column 70 by bolts, respectively. The upper support plate 79 is connected to the rear end of the panel main body 42 of the side panel 32 by bolts. Therefore, first support column 68 and second support column 70 support the rear portion of cab 4.

In the above configuration, as shown in fig. 8, the air cleaner 66, the precleaner 67, the first support column 68, and the second support column 70 can be mounted on the machine body in a state in which the respective subassemblies are assembled in advance, and the assembly workability can be improved.

[ exhaust pipes ]

The exhaust pipe 53 will be explained.

As shown in fig. 1, 2, 6, and 9, the exhaust pipe 53 is configured to guide the flow of the exhaust gas of the engine 5 introduced from the exhaust cylinder 50a of the exhaust gas treatment device 50 into the inlet portion 80 on the front side, which is one end side, and to discharge the exhaust gas to the outside from the exhaust port 81 on the rear side, which is the other end side.

As shown in fig. 10, an exhaust pipe cover 82 is provided to cover the exhaust pipe 53 from above. Although not described in detail, the exhaust pipe cover 82 is supported by being connected by bolts to a plurality of support brackets 83 welded and fixed to the outer peripheral portion of the exhaust pipe 53 at appropriate intervals in the front-rear direction. Gaps are provided between the exhaust duct cover 82 and the right side wall 7A of the threshing device 7 and between the exhaust duct cover 82 and the grain box 9 over the entire length of the exhaust duct cover 82 in the front-rear direction, and straw chips and the like can be dropped.

The center portion of the upper surface of the exhaust pipe cover 82 is located at the highest position, and the upper surface is formed in a substantially mountain shape that is inclined downward toward both the left and right end portions. The left and right side surfaces connected to the upper surface are formed as vertical surfaces extending in the up-down direction. In this way, the exhaust pipe cover 82 does not accumulate straw chips or the like on the upper side as much as possible. The exhaust duct cover 82 is provided with a space from the exhaust duct 53 by the support bracket 83, and thus has a function of heat insulation so that the hot air of the exhaust duct 53 is not transmitted to the threshing device 7 and the grain tank 9.

The exhaust duct 53 extends linearly over the entire length from the inlet 80 to the exhaust port 81 in an upward and rearward inclined posture between the threshing device 7 and the grain tank 9, and the exhaust port 81 at the rear end is located at a position forward of the rear end of the grain tank 9. As shown in fig. 8, the front side portion of the exhaust duct 53 passes through a concave space 21 formed below the projecting portion 20 at the grain tank 9. The exhaust cylinder 50a of the exhaust gas treatment device 50 is formed of a curved pipe having a curved path, and the curved path of the curved pipe is configured to guide the exhaust gas discharged from the exhaust gas outlet portion of the exhaust gas treatment device 50 obliquely upward to the right and then obliquely upward to the rear.

As shown in fig. 1 and 2, the exhaust port 81 of the exhaust duct 53 is located on the front side of the rear end of the grain tank 9. The exhaust pipe 53 is located at a position lower than the upper end of the threshing device 7 in a position forward of the front-rear middle portion, and is located at a position higher than the upper end of the threshing device 7 in a position rearward of the front-rear middle portion. The air outlet 81 is located higher than the upper end of the threshing device 7 and lower than the upper end of the grain tank 9.

As shown in fig. 10, the exhaust pipe 53 includes: a first exhaust pipe 53A formed in a cylindrical shape and located on the engine side, and a second exhaust pipe 53B formed in a cylindrical shape and located on the exhaust port 81 side. A gap 85 for air introduction is formed at a connection portion 84 between the first exhaust pipe 53A and the second exhaust pipe 53B. The rear end portion of the first exhaust pipe 53A of the connection portion 84 has a small diameter, and the leading end portion of the second exhaust pipe 53B has a large diameter, and is connected in a state where the rear end portion of the first exhaust pipe 53A and the leading end portion of the second exhaust pipe 53B overlap with each other with a gap 85 formed therebetween. According to this configuration, when the exhaust gas discharged from the first exhaust pipe 53A passes through the connection portion 84, the outside air is sucked from the gap 85 by the discharge effect, and the low-temperature outside air and the high-temperature exhaust gas are merged with each other, whereby the temperature of the exhaust gas discharged to the outside can be lowered.

As shown in fig. 2 and 9, the connecting portion 84 between the first exhaust duct 53A and the second exhaust duct 53B is provided in a state of being located on the lateral side of a portion provided with the winnowing device 17, that is, a portion where the concave portion 22 is formed in the grain box 9. That is, the first exhaust pipe 53A and the second exhaust pipe 53B are connected in the front-rear direction at a position corresponding to the recessed portion 22. With the above configuration, the concave portion 22 into which the winnowing device 17 enters is formed on the outer right side of the connecting portion 84, and therefore, an open space is formed, and low-temperature outside air can be easily and efficiently sucked. The left outer side of the connecting portion 84 is a vacant space above the threshing device 7, and is an open space.

An inlet 80 of the first exhaust pipe 53A is overlapped and connected to a rear end portion of the discharge cylinder 50a of the exhaust gas treatment device 50 with a gap. In the inlet portion 80, similarly to the connection portion 84 between the rear end portion of the first exhaust pipe 53A and the leading end portion of the second exhaust pipe 53B, the outside air is sucked through the gap, and the low-temperature outside air and the high-temperature exhaust gas are merged with each other, whereby the temperature of the exhaust gas to be discharged can be reduced.

As shown in fig. 9, an attachment plate 86 welded and fixed to a lower portion of the front side of the first exhaust pipe 53A is connected by a bolt to a support bracket 87 having a substantially L shape in plan view, which is connected by a bolt to the right side wall 7A of the threshing device 7. Further, the mounting plate 88 welded and fixed to the lower portion of the rear portion side of the first exhaust pipe 53A is connected by bolts to the front portion side connecting stay 19 of the pair of front and rear connecting stays 19 that support the upper portion side portion of the grain raising device 17. Thus, the first exhaust duct 53A is stably supported by the right sidewall 7A of the threshing device 7 and the winnowing device 17 at both front and rear side portions.

As shown in fig. 9, an attachment plate 89 that is fixed to the lower portion of the second exhaust pipe 53B by welding and has a lower end portion bent into a substantially L shape is connected to and supported by a support bracket 90 that is connected to the right side wall 7A of the threshing device 7 by a bolt and has a substantially L shape in front view. The mounting plate 89 is formed long in the front-rear direction, and both front and rear end portions thereof are connected to the threshing device 7. With this structure, the second exhaust pipe 53B is stably supported.

The exhaust port 81 of the exhaust pipe 53 is configured to be opened in a circular shape by cutting a cylindrical pipe in a direction orthogonal to the axial direction, and the exhaust gas flowing through the exhaust pipe 53 and discharged from the exhaust port 81 is smoothly and straightly discharged rearward in the axial direction without disturbing the flow.

[ other embodiments ]

(1) In the above embodiment, the following structure is adopted: the exhaust duct 53 includes a first exhaust duct 53A and a second exhaust duct 53B, which are connected to each other at positions corresponding to the recessed portion 22 of the grain tank 9.

(2) In the above embodiment, the air outlet 81 is located at a position lower than the upper end of the grain tank 9, but the air outlet 81 may be located at a position higher than the upper end of the grain tank 9.

(3) In the above embodiment, the protruding portion is formed in the cereal grain box, but a structure without such a protruding portion may be employed.

(4) In the above embodiment, the following structure is adopted: the exhaust gas treatment device is provided on the lateral side of the engine, and the exhaust gas treated by the exhaust gas treatment device is introduced into the inlet portion of the exhaust pipe through the bent pipe.

Industrial applicability

The invention can be a whole-feed combine harvester besides a half-feed combine harvester, is not limited to combine harvesters, and can also be applied to harvesters for harvesting other crops.

Second embodiment:

the mode for carrying out the present invention is explained based on the drawings. In the following description, when the front-rear direction of the machine body is defined, the machine body is defined along the traveling direction of the machine body in the working state, and when the left-right direction of the machine body is defined, the left-right direction is defined in a state viewed from the traveling direction of the machine body. That is, the direction indicated by reference numeral "F" in fig. 12 and 13 is the front side of the body, and the direction indicated by reference numeral "B" in fig. 12 and 13 is the rear side of the body. The direction indicated by reference numeral "L" in fig. 13 is the left side of the body, and the direction indicated by reference numeral "R" in fig. 13 is the right side of the body.

[ integral structure of combine harvester ]

Fig. 12 and 13 show a half-feed combine harvester as an example of the harvester. In the combine harvester, a harvesting unit 3 as a harvesting unit for harvesting standing grain stalks is provided in front of a traveling machine body including a frame 1 and a pair of right and left crawler traveling devices 2. A driver 4 on which a driver rides is provided on the right side of the front part of the traveling machine body behind the harvesting unit 3. A power unit 6 for housing the engine 5 is provided below the driver unit 4. A threshing device 7 for threshing the harvested rice straws is arranged behind the harvesting part 3. A grain straw conveying device 8 as a crop conveying device for conveying the harvested grain straw from the harvesting unit 3 toward the threshing device 7 is provided across the harvesting unit 3 and the threshing device 7. The grain tank 9 for storing grains after threshing is disposed in a state of being arranged in the left-right direction with the threshing device 7.

As shown in fig. 12 and 20, the upper portion of the grain raising device 17 is connected and fixed to the right side wall 7A of the threshing device 7 by a pair of front and rear connecting stays 19 formed of plate bodies having a substantially L-shape in plan view. One end of each of the pair of connecting stays 19 is connected to an outer peripheral portion of the winnowing device 17 by welding, and the other end is connected to the right side wall 7A of the threshing device 7 by a bolt.

As shown in fig. 22, a protruding portion 20 protruding toward the threshing device 7 is formed at an upper portion of the grain box 9 on the threshing device 7 side on the front side, and a concave space 21 recessed toward the box inner side is formed below the protruding portion 20. By providing the extension portion 20 in this way, the empty space above the threshing device 7 can be effectively utilized, and the grain storage capacity can be increased. As shown in fig. 13, a longitudinally long concave portion 22 into which the winnowing device 17 enters is formed at a position corresponding to the winnowing device 17 on the threshing device 7 side, that is, the left side surface of the grain box 9.

As shown in fig. 12 and 13, a grain discharging device 23 is provided for discharging grains in the grain tank 9 to the outside. The grain discharge device 23 includes: a spiral-conveying type vertical conveying part 24 for conveying the grains in the grain box 9 upwards, and a spiral-conveying type horizontal conveying part 25 for conveying the grains from the vertical conveying part 24 to the outside of the machine body. The grain discharging device 23 is configured to be capable of being operated by the electric motor 26 to revolve around the vertical axis (the axis of the vertical conveying section 24) Z1. The lateral transfer unit 25 is configured to be vertically swingable about a lateral axis X1 at the end on the side of the vertical transfer unit 24 by the hydraulic cylinder 27.

[ Driving part ]

The cab 4 is not covered with a cab or the like, and is opened upward. The steering unit 4 is provided beside the straw conveyor 8 (adjacent to the right) in front of the grain tank 9. As shown in fig. 13, the cab 4 includes a cab seat 30, a front panel 31, and a side panel 32.

The side panel 32 is provided on the left side, which is the side where the straw conveyor 8 is located, in the left-right direction of the machine body with respect to the driver seat 30. The side plate 32 is provided with a main shift lever 35, an auxiliary shift lever 36, a clutch lever 37, and a grain discharge operation portion 38. As shown in fig. 13, 14 and 15, the main shift lever 35 and the sub shift lever 36 are disposed in a lateral arrangement on the front portion 32A of the side panel 32, the clutch lever 37 is disposed on the front-rear intermediate portion 32B of the side panel 32, and the grain discharge operation portion 38 is disposed on the rear portion 32C of the side panel 32.

As shown in fig. 14, the side panels 32 extend from the front end to the rear end and have a shape protruding substantially like a box. The upper surface of the front portion 32A of the side panel 32 is set to the same height as the front panel 31. The upper surfaces of the front and rear intermediate portions 32B of the side panels 32 are set at a higher position than the front portions 32A, and the upper surfaces of the rear portions 32C of the side panels 32 are set at a higher position than the front and rear intermediate portions 32B.

[ dustproof structure of threshing entrance ]

As shown in fig. 13, an inlet plate 45 is provided at a front portion of the threshing device 7, and the inlet plate 45 receives the ear tip side of the harvested straw delivered from the straw conveyor 8 and conveyed by the supply chain 16 while sandwiching the root side thereof between the inlet plate and the straw and guides the ear tip side of the harvested straw to flow down to the supply port 44, and is configured to supply the ear tip side of the harvested straw from the supply port 44 of the threshing device 7 to the inside of the threshing chamber while being received and guided by the inlet plate 45.

As shown in fig. 15 and 16, a dust cover K is provided near the supply port 44 of the threshing device 7, and blocks a gap formed between the side plate 32 and the straw conveyor 8, thereby preventing dust such as straw dust generated in association with harvesting work during threshing from falling downward from the gap.

[ power section ]

As shown in fig. 13 and 17, the power unit 6 houses, in addition to the engine 5, an exhaust gas treatment device 50 that purifies exhaust gas from the engine 5, a radiator 51 that radiates heat from engine cooling water, a cooling fan 52 that cools the radiator 51, and the like. The radiator 51 is disposed laterally outward (rightward) of the body with respect to the engine 5.

The exhaust gas treatment device 50 performs a purification treatment of the exhaust gas of the engine 5 by a DPF (diesel particulate filter). As shown in fig. 12, 13, 15, and 16, the exhaust gas treatment device 50 is provided on the side of the power unit 6 closer to the straw conveyance device 8 than the driver's seat 30 in the left-right direction. To be described, the exhaust gas treatment device 50 is provided in a state of being positioned in front of the threshing device 7 and in a state of being positioned below the side plate 32 and below the dust cover K. The exhaust gas treatment device 50 is provided in a state in which the left-right range of the exhaust gas treatment device 50 overlaps with the left-right range of the part of the threshing device 7 on the grain tank 9 side (right side) and the longitudinal direction of the exhaust gas treatment device 50 is along the front-rear direction of the machine body. The upper side of the exhaust gas treatment device 50 is covered with the side panel 32 and the dust cover K, and the straw chips and the like do not fall on the exhaust gas treatment device 50.

As shown in fig. 13, 14, and 17, the power unit 6 is covered with a top plate 55 covering the upper side, a front plate 56 covering the front side, a rear plate 57 covering the rear side, and a dust-proof case 58 located on the right side. The top plate 55, the front plate 56, the rear plate 57, and the dust-proof case 58 are integrally coupled to each other, and are supported by the frame 1 so as to be rotatable (see an arrow in fig. 17) about a longitudinal axis X2 at a lower end between an appropriate attachment state (see fig. 17) and a horizontal open state (not shown). In an appropriately attached state, the top plate 55 is fixed to the side plate 32 by a lock mechanism, not shown, provided in the figure. The rear plate 57 has a left-right divided structure in which only the right side portion 57a is integrally rotatable and the left side portion 57b is fixedly supported.

As shown in fig. 17, a working oil cooler 62 for cooling the working oil by the cooling wind blown by the cooling fan 52 and a fuel cooler 63 for cooling the fuel of the engine 5 are provided on the housing inner side (power unit side) of the dust cover 58 corresponding to the opening 61 for ventilation. As shown in fig. 18, the hydraulic oil cooler 62 and the fuel cooler 63 are mounted to the dust cover 58 in a state of being mounted in advance to a support frame 65 in which a plurality of stays 64 are connected in a rectangular frame shape.

[ Structure for intake of engine ]

An air cleaner 66 for an engine and a precleaner 67 for the engine are provided behind the driver seat 30. As shown in fig. 12 and 13, an air cleaner 66 and a pre-cleaner 67 are provided at the front-rear middle portion between the driver seat 30 and the grain tank 9 arranged in the front-rear direction. The air cleaner 66 is formed in a substantially cylindrical shape, and is provided directly behind the driver seat 30 in a lateral posture such that the longitudinal direction thereof extends in the left-right direction.

As shown in fig. 12, 13, 17, and 19, a first support 68 that supports the rear portion of the cab 4 is provided in a state of being erected from the frame 1. A precleaner 67 and an air cleaner 66 are supported by the first support column 68. As shown in fig. 17, an attachment plate 69 welded to the lower end of the first support column 68 is connected to the frame 1 by bolts. The first support column 68 is formed in a square tube shape and extends upward from the attachment plate 69. A second support 70 is provided on the left side of the first support 68. Like the first support column 68, the second support column 70 is fixed to the frame 1 by a bolt with a mounting plate 71 welded to the lower end portion thereof extending upward. The second leg 70 is formed shorter than the first leg 68.

The right support bracket 77 of the second support column 70 and the left support bracket 76 of the first support column 68 are coupled by bolts. Further, the left portion 57b of the rear plate 57 is bolted to the right support bracket 77 of the second support column 70 and the right support bracket 76 of the first support column 68, respectively. Similarly, the lower portion of the left side portion 57b of the rear plate 57 is also connected to the first support column 68 and the second support column 70 by bolts at appropriate locations.

As shown in fig. 17, the rear end portions of the side panels 32 are placed and supported on the support brackets 78 on the front side of the second stays 70 and are fastened by bolts. Further, an upper support plate 79 constituting a part of the top plate 55 is connected to the right support bracket 76 and the front support bracket 76 of the first support column 68 and the right support bracket 77 of the second support column 70 by bolts, respectively. The upper support plate 79 is connected to the rear end of the panel main body 42 of the side panel 32 by bolts. Therefore, first support column 68 and second support column 70 support the rear portion of cab 4.

In the above configuration, as shown in fig. 19, the air cleaner 66, the precleaner 67, the first support column 68, and the second support column 70 can be mounted on the machine body in a state in which the respective subassemblies are assembled in advance, and the assembly workability can be improved.

[ exhaust pipes ]

The exhaust pipe 53 will be explained.

As shown in fig. 12, 13, 17, and 20, the exhaust pipe 53 is configured to guide the flow of the exhaust gas of the engine 5 introduced from the exhaust cylinder 50a of the exhaust gas treatment device 50 into the inlet portion 80 on the front side, which is one end side, and to discharge the exhaust gas to the outside from the exhaust port 81 on the rear side, which is the other end side.

As shown in fig. 21, an exhaust pipe cover 82 is provided to cover the exhaust pipe 53 from above. Although not described in detail, the exhaust pipe cover 82 is supported by being connected by bolts to a plurality of support brackets 83 welded and fixed to the outer peripheral portion of the exhaust pipe 53 at appropriate intervals in the front-rear direction. Gaps are provided between the exhaust duct cover 82 and the right side wall 7A of the threshing device 7 and between the exhaust duct cover 82 and the grain box 9 over the entire length of the exhaust duct cover 82 in the front-rear direction, and straw chips and the like can be dropped.

The exhaust duct 53 extends linearly over the entire length from the inlet 80 to the exhaust port 81 in an upward and rearward inclined posture between the threshing device 7 and the grain tank 9, and the exhaust port 81 at the rear end is located at a position forward of the rear end of the grain tank 9. As shown in fig. 19, the front side portion of the exhaust duct 53 passes through a concave space 21 formed below the projecting portion 20 at the grain tank 9. The exhaust cylinder 50a of the exhaust gas treatment device 50 is formed of a curved pipe having a curved path, and the curved path of the curved pipe is configured to guide the exhaust gas discharged from the exhaust gas outlet portion of the exhaust gas treatment device 50 obliquely upward to the right and then obliquely upward to the rear.

As shown in fig. 12 and 13, the exhaust port 81 of the exhaust duct 53 is located on the front side of the rear end of the grain tank 9. The exhaust pipe 53 is located at a position lower than the upper end of the threshing device 7 in a position forward of the front-rear middle portion, and is located at a position higher than the upper end of the threshing device 7 in a position rearward of the front-rear middle portion. The air outlet 81 is located higher than the upper end of the threshing device 7 and lower than the upper end of the grain tank 9.

As shown in fig. 21, the exhaust pipe 53 includes: a first exhaust pipe 53A formed in a cylindrical shape and located on the engine side, and a second exhaust pipe 53B formed in a cylindrical shape and located on the exhaust port 81 side. A gap 85 for air introduction is formed at a connection portion 84 between the first exhaust pipe 53A and the second exhaust pipe 53B. The rear end portion of the first exhaust pipe 53A of the connection portion 84 has a small diameter, and the leading end portion of the second exhaust pipe 53B has a large diameter, and is connected in a state where the rear end portion of the first exhaust pipe 53A and the leading end portion of the second exhaust pipe 53B overlap with each other with a gap 85 formed therebetween. According to this configuration, when the exhaust gas discharged from the first exhaust pipe 53A passes through the connection portion 84, the outside air is sucked from the gap 85 by the discharge effect, and the low-temperature outside air and the high-temperature exhaust gas are merged with each other, whereby the temperature of the exhaust gas discharged to the outside can be lowered.

As shown in fig. 13 and 20, the connecting portion 84 between the first exhaust duct 53A and the second exhaust duct 53B is provided in a state of being located on the lateral side of a portion provided with the winnowing device 17, that is, a portion where the concave portion 22 is formed in the grain box 9. That is, the first exhaust pipe 53A and the second exhaust pipe 53B are connected in the front-rear direction at a position corresponding to the recessed portion 22. With the above configuration, the concave portion 22 into which the winnowing device 17 enters is formed on the outer right side of the connecting portion 84, and therefore, an open space is formed, and low-temperature outside air can be easily and efficiently sucked. The left outer side of the connecting portion 84 is a vacant space above the threshing device 7, and is an open space.

An inlet 80 of the first exhaust pipe 53A is overlapped and connected to a rear end portion of the discharge cylinder 50a of the exhaust gas treatment device 50 with a gap. This connection portion also allows outside air to be taken in from the gap, and the temperature of the exhaust gas to be reduced by merging low-temperature outside air with high-temperature exhaust gas, similarly to the connection portion 84 between the rear end portion of the first exhaust pipe 53A and the leading end portion of the second exhaust pipe 53B.

As shown in fig. 20, an attachment plate 86 welded and fixed to a lower portion of the front side of the first exhaust pipe 53A is connected by a bolt to a support bracket 87 having a substantially L shape in plan view, which is connected by a bolt to the right side wall 7A of the threshing device 7. Further, the mounting plate 88 welded and fixed to the lower portion of the rear portion side of the first exhaust pipe 53A is connected by bolts to the front portion side connecting stay 19 of the pair of front and rear connecting stays 19 that support the upper portion side portion of the grain raising device 17. Thus, the first exhaust duct 53A is stably supported by the right sidewall 7A of the threshing device 7 and the winnowing device 17 at both front and rear side portions.

As shown in fig. 20, an attachment plate 89 that is fixed to the lower portion of the second exhaust pipe 53B by welding and has a lower end portion bent into a substantially L shape is connected to and supported by a support bracket 90 that is connected to the right side wall 7A of the threshing device 7 by a bolt and has a substantially L shape in front view. The mounting plate 89 is formed long in the front-rear direction, and both front and rear end portions thereof are connected to the threshing device 7. With this structure, the second exhaust pipe 53B is stably supported.

[ other embodiments ]

(1) In the above embodiment, the pre-filter 67 is provided in a state where the suction port 67a is positioned between the upper end of the grain tank 9 and the upper end of the dust case 58 in the side view, but instead of this configuration, the pre-filter 67 may be provided at a position above the upper end of the grain tank 9, or the pre-filter 67 may be provided at a position below the upper end of the dust case 58.

(2) In the above-described embodiment, the pre-filter 67 and the air filter 66 are supported by the first support column 68 that supports the rear portion of the cab 4, but instead of this structure, a structure may be employed in which the pre-filter 67 and the air filter 66 are supported by separately provided support columns, or a structure may be employed in which the pre-filter 67 and the air filter 66 are supported by dedicated support members instead of the support columns that support the rear portion of the cab 4.

(3) In the above embodiment, the following structure is adopted: an air cleaner 66 is provided at a position directly behind the driver seat 30, a pre-cleaner 67 is provided at a position directly above the air cleaner 66, and the pre-cleaner 67 and the air cleaner 66 are connected by a straight pipe-shaped connecting pipe 75, but instead of this structure, the following structure may be adopted: the air cleaner 66 is provided at a position different from the position directly behind the driver seat 30, such as a position below the driver seat 30 and a position on the left and right lateral sides, and the pre-cleaner 67 and the air cleaner 66 are connected by a connecting pipe having a bent structure.

(4) In the above embodiment, the pre-filter 67 and the air filter 66 are provided in a state of being positioned on the front side of the first support column 68, but instead of this configuration, the pre-filter 67 and the air filter 66 may be provided in a state of being positioned on the rear side of the first support column 68.

(5) In the above embodiment, the dust cover K is configured to include the ceiling wall portion 47 and the vertical wall portion 48 extending in the vertical posture in a state of being continuous downward at the front side edge portion and the left side edge portion of the ceiling wall portion 47, but instead of this configuration, the following configuration may be adopted: the structure may be such that the vertical wall portion 48 is not provided but only the top wall portion 47 is provided, that the structure may be such that the vertical wall portion is provided with the top wall portion and the vertical wall portion is formed of a soft sheet member (bulging portion) over the entire vertical width, or that the structure may be such that the structure is provided with the top wall portion and the vertical wall portion is formed of a hard wall member whose upper side is continuous with the top wall portion and whose lower side is formed of a soft sheet member.

Industrial applicability

The invention can be applied to harvesters such as a full-feed combine harvester, a corn harvester and the like besides a semi-feed combine harvester.

Claims

1. A harvester, comprising:

a threshing device for threshing the harvested grain stalks;

a grain tank that is arranged in a transverse direction of the threshing device and stores grains obtained by the threshing process;

an engine located on the front side of the grain box; and

an exhaust pipe that guides a flow of exhaust gas of the engine introduced from an inlet portion on one end side and discharges the exhaust gas to the outside from an exhaust port on the other end side,

the exhaust pipe extends linearly between the threshing device and the grain tank in a rear-upper inclined posture, and the exhaust port is located on the front side of the rear end of the grain tank.

2. A harvester according to claim 1,

the exhaust gas treatment device is provided on a lateral side of the engine, and purifies exhaust gas from the engine and sends the exhaust gas to the exhaust pipe.

3. A harvester according to claim 2,

the exhaust gas treatment device is provided in a state of being located in front of the threshing device, the exhaust gas is introduced into the inlet portion of the exhaust pipe through a bent pipe, and the bent pipe forms a bent path in a manner that an inflow direction of the exhaust gas is different from a discharge direction after passing through the bent pipe.

4. A harvester according to any one of claims 1 to 3,

a protruding part protruding toward the threshing device side is formed at an upper part of the grain box on the threshing device side, and a concave space recessed toward the box inner side is formed below the protruding part,

the exhaust pipe passes through the concave space.

5. A harvester according to any one of claims 1 to 4,

a grain raising device is provided between the threshing device and the grain box, the grain raising device conveys the grains obtained by the threshing device upwards towards the feeding opening of the grain box,

a longitudinal long concave part for the winnowing device to enter is formed on the side surface of the grain box on the threshing device side,

the exhaust pipe includes a first exhaust pipe located on the engine side and a second exhaust pipe located on the exhaust port side,

the first exhaust pipe and the second exhaust pipe are connected in a front-rear direction at a position corresponding to the recessed portion, and a gap for introducing air is formed at a connection portion of the first exhaust pipe and the second exhaust pipe.

6. A harvester according to any one of claims 1 to 5,

the air outlet is located at a position lower than the upper end of the grain box.

7. A harvester, comprising:

a harvesting part which is arranged at the front part of the machine body and harvests crops;

a crop conveying part which is arranged behind the harvesting part and conveys the harvested crops to the rear;

an open-top cab provided behind the harvesting unit in a state of being arranged laterally to the crop conveying unit;

a threshing part which is arranged behind the crop conveying part and is used for threshing the conveyed crops;

a grain tank disposed behind the driving unit in a state of being arranged in a transverse direction to the threshing unit, for storing grains obtained by the threshing process; and

a power unit disposed below the driver unit and housing an engine,

the operator's seat and a side panel located on the side of the crop conveying unit in the left-right direction with respect to the operator's seat are provided in the operator's seat,

an exhaust gas treatment device for treating exhaust gas of the engine is provided on the side of the power unit closer to the crop conveying unit than the driver seat in the left-right direction,

an exhaust pipe for guiding the exhaust gas treated by the exhaust gas treatment device extends rearward and upward between the threshing part and the grain tank,

a pre-filter is provided at a position directly behind the driver seat and between the driver seat and the grain tank at a position higher than the driver seat.

8. A harvester according to claim 7,

an air cleaner is provided directly behind the driver seat, and the pre-cleaner is provided directly above the air cleaner.

9. A harvester according to claim 8,

the pre-filter and the air filter are connected by a straight pipe-shaped connection pipe.

10. A harvester according to claim 8 or 9,

a pillar for supporting a rear portion of the cab is provided in a state of being erected from a frame,

the pre-filter and the air filter are supported by the support.

11. A harvester according to claim 10,

the pre-filter and the air filter are provided in a state of being positioned on the front side of the pillar.

12. A harvester according to any one of claims 7 to 11,

a dust-proof case for allowing air to flow into the power unit and restricting air from being discharged is provided at a portion facing the outside in the lateral direction of the power unit,

the pre-filter is arranged in a state that the suction inlet is positioned between the upper end part of the grain box and the upper end part of the dustproof shell when the pre-filter is viewed from side.