CN116034718A

CN116034718A - Harvester

Info

Publication number: CN116034718A
Application number: CN202211684264.4A
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: 2023-05-02
Also published as: CN111373921A

Abstract

The present invention relates to a harvester. It is desirable to be able to discharge the exhaust gas of the engine in a state in which the exhaust gas of the engine smoothly flows in the exhaust pipe and is easily diffused outward in advance. The harvester is provided with: a threshing device (7) for threshing the harvested cornstalks; a grain box (9) for storing grains obtained by threshing; an engine (5) located on the front side of the grain box (9); and an exhaust pipe (53) for guiding the flow of the exhaust gas of the engine (5) introduced from the inlet portion on one end side and discharging the exhaust gas to the outside from the exhaust port (81) on the other end side, wherein the exhaust pipe (53) extends linearly in a rear-upper inclined posture between the threshing device (7) and the grain box (9), and the exhaust port (81) on the rear end is located at a position on the front side of the rear end portion of the grain box (9).

Description

Harvester

The present application is a divisional application of patent application of the invention with the application date of 2019, 12 months and 24 days, the application number of 201911344863.X and the invention name of "harvester".

Technical Field

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

The second aspect of the present invention relates to a harvester such as a combine harvester, and more particularly to a harvester including a driving part opened at an upper side of a harvesting part at a front part of a machine body, a threshing part for threshing crops and a grain storage part for storing grains obtained by the threshing process being provided in a laterally aligned state, and an engine being housed below the driving part.

Background

As for the first aspect, there is a conventional combine harvester which is an example of a harvester, including: the threshing device is provided in a state of being aligned in the left-right direction, an exhaust pipe is provided between the threshing device and the grain box, an upstream region in the flow direction of the exhaust pipe is set in a rear-upper inclined posture of a steep slope, a downstream region 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 the flow path, and a portion close to the exhaust port is also curved so that the exhaust direction is directed toward the threshing device side (for example, refer to patent document 1).

Prior art literature

Patent literature

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 curved 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 curved in the flow direction at the curved portion, and therefore there is a concern that flow resistance such as disturbance of the flow of the exhaust gas increases to prevent smooth flow of the exhaust gas. Further, since the exhaust gas is also bent at a portion close to the exhaust port, the potential of the exhaust gas discharged from the exhaust port is weakened, and the exhaust gas is hard to diffuse into the atmosphere, and there are disadvantages such as the exhaust gas staying in a portion close to the grain tank.

As for the second aspect, there is a conventional harvester in which a prefilter for sucking combustion air supplied to an engine is provided at a high position between a threshing device and a grain storage unit at a position closer to the rear of a machine body (see patent literature 2, for example).

Prior art literature

Patent literature

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

Problems to be solved by the invention

In the above-described conventional structure, since straw chips and the like are suspended as the harvested stalks are conveyed in the vicinity of the inlet of the threshing device by the harvesting operation, such dust does not fly toward the prefilter. With such a configuration, the pre-cleaner is located at a position away from the air cleaner provided near the engine, and therefore, there are disadvantages such as an increase in air intake resistance and a decrease in intake efficiency due to an increase in air piping.

To avoid such an adverse situation, the following structure can be considered: the prefilter is provided at a position laterally outward of the machine body in a region between the driving unit and the grain storage unit, or at a position on the threshing device side in a region between the driving unit and the grain storage unit.

However, when harvesting, there are unharvested stalks at the lateral outer side of the machine body. Therefore, in the structure in which the prefilter is provided at a position laterally outward of the machine body in the region between the driving portion and the grain storage portion, dust generated from the unharvested stalks during the harvesting operation is likely to scatter to the prefilter.

In addition, in the configuration in which the pre-cleaner is provided at a position closer to the threshing device in the region between the driving unit and the grain storage unit, dust generated near the inlet of the threshing device as described above is more likely to scatter toward the pre-cleaner. Recently, an exhaust gas treatment device for purifying the exhaust gas of the engine may be provided, and the exhaust gas treatment device may be provided on the side of the power unit opposite to the radiator, that is, on the threshing device side. As a result, there are also disadvantages such as the high heat generated from the exhaust gas treatment device adversely affecting the pre-filter.

Disclosure of Invention

Accordingly, in the first aspect, it is desirable to be able to discharge the exhaust gas of the engine in a state in which the exhaust gas of the engine smoothly flows in the exhaust pipe and is easily diffused outward in advance.

Means for solving the problems

The harvester of the invention has the following characteristic structure:

the harvester is provided with: the threshing device is used for threshing the harvested cereal stalks; a grain box which is arranged in a transverse direction of the threshing device and stores grains obtained by threshing; an engine located on a front side of the grain bin; 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 that discharges the exhaust gas to the outside from the exhaust port on the other end side, wherein the exhaust pipe extends straight in a rear-upper inclined posture between the threshing device and the grain box, and wherein the exhaust port is located on the front side of the rear end portion of the grain box.

According to the present invention, since the exhaust pipe extends straight in the rear-upper inclined posture, the exhaust gas of the engine introduced from the inlet portion on one end side is smoothly guided along the straight flow path without disturbing the flow. And is discharged from the exhaust port straight rearward along the pipe length direction. In addition, the exhaust port at the rear end of the exhaust pipe is located at the front side of the rear end of the grain box, so that miniaturization can be realized without excessively long front-rear length of the exhaust pipe. As a result, the exhaust pipe itself is not lengthened, and the flowing exhaust gas is emitted outward from the exhaust port with good momentum, so that the exhaust gas is easily diffused in the air, and the exhaust gas can be prevented from staying close to the grain box.

Therefore, the exhaust gas of the engine can smoothly flow in the exhaust pipe, and can be discharged to the outside in a state where the exhaust gas is easily diffused without being retained.

In the present invention, it is preferable that an exhaust gas treatment device that purifies exhaust gas of the engine and sends the purified exhaust gas to the exhaust pipe is provided laterally of the engine.

According to this structure, the exhaust gas discharged to the outside of the engine is purified, and the pollution of the atmosphere can be reduced as much as possible.

In the present invention, it is preferable that the exhaust gas treatment device is provided in front of the threshing device, and the exhaust gas is introduced into the inlet portion of the exhaust pipe through a curved pipe that forms a curved 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 discharge port of the exhaust gas treatment device can be discharged and guided in different directions without being restricted by the discharge direction from the discharge port by using the curved pipe. As a result, even if the exhaust pipe is disposed in a rear-upper inclined posture between the threshing device and the grain box, the exhaust gas treatment device can be disposed in a space area reasonably and compactly without being restricted by the installation posture of the exhaust gas treatment device.

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

According to this structure, the protruding portion is formed in the grain box, whereby the grain storage amount can be increased, and the exhaust pipe can be compactly arranged with the recessed space formed below the protruding portion without enlarging the body lateral width.

In the present invention, it is preferable that a threshing device is provided between the threshing device and the grain box, the threshing device conveys grains obtained by the threshing device upward toward a feed port of the grain box, a vertically long concave portion into which the threshing device enters is formed in a side surface of the grain box on the threshing device side, the exhaust pipe is provided with 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 at positions corresponding to the concave portion in the front-rear direction, and a gap for introducing air is formed in a connection portion between the first exhaust pipe and the second exhaust pipe.

According to this structure, the concave portion into which the grain lifting device enters is formed in the portion facing the grain tank side at the connection portion where the first exhaust pipe and the second exhaust pipe are connected, and thus the connection portion becomes an open space. As a result, low-temperature outside air is easily and efficiently sucked from the gap formed in the connection portion.

In the present invention, the air outlet is preferably located at a position lower than the upper end of the grain tank.

According to this configuration, the height position of the exhaust pipe is not excessively high, and the exhaust pipe can be kept from contacting, for example, the conveyor for discharging grains, the upper part of a warehouse for storing grains, or the like, which moves above the grain box.

In the second aspect, it is desirable to prevent the combustion air from decreasing in intake efficiency with respect to the engine and to suppress adverse effects of dust, high heat, and the like on the pre-filter.

Means for solving the problems

The harvester of the invention has the following characteristic structure:

the harvester is provided with: the harvesting part is arranged at the front part of the machine body and is used for harvesting crops; a crop conveying part arranged behind the harvesting part and conveying the harvested crops to the rear; an upper open-type driving unit disposed behind the harvesting unit in a state of being laterally aligned with 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 box provided in a state of being transversely aligned with the threshing unit at the rear of the driving unit, and storing grains obtained by threshing; and a power unit that is provided below the driving unit and accommodates an engine, wherein the driving unit includes a driver seat and a side panel that is positioned on the crop conveying unit side in a lateral direction with respect to the driver seat, and wherein the power unit includes an exhaust gas treatment device that treats exhaust gas of the engine, and wherein an exhaust pipe that guides exhaust gas treated by the exhaust gas treatment device extends upward and rearward between the threshing unit and the grain box, and wherein the power unit includes a pre-cleaner that is positioned immediately behind the driver seat and between the driver seat and the grain box at a position higher than the driver seat.

According to the present invention, the exhaust gas of the engine provided below the driving unit is treated by the exhaust gas treatment device, and then is guided to the upper rear side of the engine body through the exhaust pipe and discharged to the outside of the engine, so that the region between the driving unit and the grain storage unit is not adversely affected. However, since the exhaust gas treatment device heats the surroundings with the treatment, the exhaust gas treatment device may be affected by heat if it is located on the threshing device side in the region between the driving part and the grain storage part.

Therefore, the pre-filter adopts the following structure: the grain box is located between the driver's seat and the grain box at a position immediately behind the driver's seat and at a position higher than the driver's seat. As a result, compared to a structure provided in a region between the driving unit and the grain storage unit and closer to the threshing device, the device can be separated from the exhaust gas treatment device, heat can be blocked by the side panels, the influence of the heat is less likely to be received, and dust generated near the inlet of the threshing device is less likely to scatter to the pre-cleaner. Further, dust generated from the unharvested stalks is less likely to scatter onto the pre-cleaner than when the dust is disposed at a position laterally outward of the machine body in the region between the driving unit and the grain storage unit.

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

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

According to this configuration, the pre-cleaner and the air cleaner can be disposed in the empty area between the driver seat and the grain box, so that the overall intake efficiency can be improved, and the air cleaner and the pre-cleaner can be disposed so as to overlap in the vertical direction, thereby realizing a compact installation space in the plan view.

In the present invention, it is preferable that the prefilter and the air cleaner are connected by a straight pipe-shaped connecting pipe.

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

In the present invention, it is preferable that a pillar that supports a rear portion of the cab is provided in a state of being erected from a frame, and the pre-cleaner and the air cleaner are supported by the pillar.

According to this structure, the prefilter and the air cleaner are supported by the same column, and thus the support structure can be simplified as compared with a structure in which they are supported by the columns provided separately.

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

According to this structure, the stay supports the rear portion of the driving portion, for example, the rear end portion of the cover that covers the upper side of the power portion. Since the pre-cleaner is located on the front side of the pillar as compared with the air cleaner, the spare area above the cover on the rear side of the driver seat can be effectively used for installation.

In the present invention, it is preferable that a dust-proof case that allows air to flow into the power unit and restricts air discharge is provided at a position facing the lateral outside of the power unit, and the pre-cleaner is provided in a state where the suction port is located between the upper end of the grain tank and the upper end of the dust-proof case in a side view.

According to this configuration, air is sucked outside the lateral side of the dust-proof case, and there is a concern that dust that passes through the lateral conveying portion of the grain discharging device, or that is scattered from the outside, for example, passes through the upper side of the upper end portion of the grain tank. Thus, the suction inlet of the prefilter is positioned between the upper end of the grain tank and the upper end of the dust-proof housing. With this structure, the precleaner easily sucks clean air with less dust or the like.

Drawings

First embodiment:

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

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

Fig. 3 is a side view of the driver.

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

Fig. 5 is a front view in longitudinal section showing a part of the driving section and the vicinity of the inlet of the threshing device.

Fig. 6 is a rear view of the driver.

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

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

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

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

FIG. 11 is a front view in longitudinal section showing the arrangement of the grain tank and the exhaust pipe.

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

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

Fig. 14 is a side view of the driver.

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

Fig. 16 is a front view in longitudinal section showing a part of the driving section and the vicinity of the inlet of the threshing device.

Fig. 17 is a rear view of the driver.

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

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

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

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

FIG. 22 is a front view in longitudinal section showing the arrangement of the grain tank and the exhaust pipe.

Description of the reference numerals

First embodiment:

5 engine

7 threshing device

9 cereal grain box

17 grain-threshing device

20 extension part

21 concave space

22 concave portion

50 exhaust gas treatment device

50a bending tube

53 exhaust pipe

80 inlet portion

81 exhaust ports

84 connection part

85 gap

Second embodiment:

1 frame

3 harvesting part (harvesting part)

4 driver's part

6 power part

7 threshing part

8 grain stalk conveying appliance (crop conveying part)

9 cereal grain box

30 driver seat

32 side panel

50 exhaust gas treatment device

53 exhaust pipe

58 dustproof shell

66 air filter

67 prefilter

67a suction inlet

68 first pillar (pillar)

75 connecting pipe

Detailed Description

First embodiment:

the manner in which the present invention can be practiced is described based on the drawings. In the following description, the machine body travel direction in the working state is defined when the front-rear direction of the machine body is defined, and the left-right direction is defined when the left-right direction of the machine body is defined while being viewed from the machine body travel direction. That is, the direction indicated by reference character "F" in fig. 1 and 2 is the front side of the machine body, and the direction indicated by reference character "B" in fig. 1 and 2 is the rear side of the machine body. The direction indicated by reference numeral "L" in fig. 2 is the left side of the machine body, and the direction indicated by reference numeral "R" in fig. 2 is the right side of the machine body.

[ integral Structure of combine harvester ]

Fig. 1 and 2 show a semi-feeding combine as an example of a harvester. In the combine harvester, a harvesting part 3 serving as a harvesting part for harvesting upright stalks is arranged in front of a travelling body provided with a frame 1 and a pair of left and right crawler travelling devices 2. A driving unit 4 for a driver to ride is provided on the rear side of the harvesting unit 3 and on the right side of the front part of the traveling machine body. A power unit 6 that houses the engine 5 is provided below the driving unit 4. A threshing device 7 for threshing the harvested cornstalks is arranged behind the harvesting part 3. A grain-stalk conveying apparatus 8 as a crop conveying apparatus that conveys the harvested grain stalks from the harvesting section 3 toward the threshing apparatus 7 is provided across the harvesting section 3 and the threshing apparatus 7. The grain box 9 for storing the grains after threshing is provided in a state of being aligned in the left-right direction with the threshing device 7.

The harvesting unit 3 includes: a plurality of crop dividers 10 for dividing upright crop stalks of a plurality of planting bars to be harvested, a plurality of crop lifting devices 11 for lifting up the upright crop stalks to be harvested, a push-cut harvesting device 12 for cutting off the root parts of the lifted upright crop stalks to harvest, and the like.

Although not shown, the straw conveying device 8 conveys the harvested straw while holding the root portion of the harvested straw by the root portion holding and conveying device, conveys the ear tip side of the harvested straw by a holding and conveying mechanism, and conveys the harvested straw by guiding the ear tip side by a guiding plate in a state where the ear tip is placed, so that the harvested straw in a vertical posture gradually becomes a lying posture. The harvested stalks are handed over to the supply chain 16 of the threshing device 7.

The threshing device 7 is configured to sandwich and convey the roots of the harvested stalks conveyed by the stalk conveying device 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 ceiling plate, and a threshing chamber for threshing the spike tip side of the harvested stalks is formed. The threshing chamber is provided with a sorting part for sorting the threshing processed matters leaked from the receiving net into secondary processed matters such as grains, rice with branch stems and the like, straw scraps and the like.

A threshing device 17 composed of a screw conveyor is provided laterally outside the right side wall 7A on the grain box 9 side of the threshing device 7. The grains selected by the sorting section are discharged to the outside of the threshing device 7 on the lateral side of the grain box 9 side by a primary treated matter collecting screw 18 provided at the lower part of the sorting section, and sent to the thresher 17. The grains are then transported upward by the grain lifting device 17 and stored in the grain tank 9.

As shown in fig. 1 and 9, the upper portion of the threshing 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. In each of the pair of connecting stays 19, one end is connected to the outer peripheral portion of the threshing 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, an extension 20 extending toward the threshing device 7 is formed at an upper portion of the threshing device 7 on the front side of the grain box 9, and a recessed space 21 recessed toward the inside of the box is formed below the extension 20. By providing the protruding portion 20 in this manner, 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 vertically long concave portion 22 into which the thresher 17 enters is formed at a position corresponding to the thresher 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 for discharging grains in the grain tank 9 to the outside is provided. The grain discharging device 23 includes: a vertical conveying unit 24 for conveying grains in the grain box 9 upward, and a horizontal conveying unit 25 for conveying grains from the vertical conveying unit 24 to the outside of the machine body. The grain discharging device 23 is configured to be rotatable about an upper and lower axial center (axial center of the vertical conveying portion 24) Z1 by an electric motor 26. The lateral conveying unit 25 is configured to be capable of swinging up and down around a lateral axis X1 of the end portion on the longitudinal conveying unit 24 side by a hydraulic cylinder 27.

[ driver's part ]

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

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

The side panel 32 is provided on the left side, which is the side where the straw conveying device 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, a sub 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 auxiliary shift lever 36 are disposed in a laterally aligned state at the front portion 32A of the side plate 32, the clutch lever 37 is disposed at the front-rear intermediate portion 32B of the side plate 32, and the grain discharge operation portion 38 is disposed at the rear portion 32C of the side plate 32.

The main shift lever 35 performs a shift operation on the main shift device 28 constituted by a hydrostatic continuously variable transmission (HST) by a back-and-forth swing operation. The sub-shift lever 36 performs a shift operation on a gear-shift type sub-transmission incorporated in the transmission by a back-and-forth swing operation. The clutch lever 37 performs a switching operation of 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 surface portion of the front-rear intermediate portion 32B of the side panel 32 is set at a higher position than the front portion 32A, and the upper surface portion of the rear portion 32C of the side panel 32 is set at a higher position than the front-rear intermediate portion 32B.

With the above 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 even when the driver is operating while standing, the clutch lever 37 is easy to operate. Further, since the grain discharging operation portion 38 provided at the rear portion 32C of the side plate 32 is provided at a position higher than the clutch lever 37, the grain discharging operation portion 38 is easy to operate when the driver performs an operation while looking at the rear of the body in a standing posture at the time of discharging grains.

[ dustproof Structure of threshing inlet ]

As shown in fig. 2, an inlet plate 45 is provided at a front side portion of the threshing device 7, and the inlet plate 45 receives the spike tip side of the harvesting straw delivered from the straw delivery device 8 and delivered by the feed chain 16 with the root side interposed therebetween, and is configured to be fed into the threshing chamber from the feed port 44 of the threshing device 7 while being received and guided by the inlet plate 45, and to flow down to the feed port 44.

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

The dust cover K includes: a top wall portion 47 covering the upper part of the gap in a state protruding from the partition plate 46 toward the straw conveying device 8 side, and a longitudinal wall portion 48 extending in a longitudinal posture in a state where the front side edge portion and the left side edge portion of the top wall portion 47 are connected downward. The connection portion between the top wall portion 47 and the longitudinal wall portion 48 is connected in a smoothly connected state over substantially the entire region so as not to generate a step or a gap. With the above configuration, the dust cover K receives the straw chips generated during the harvesting operation, and the received straw chips are guided to the inlet plate 45 without being retained. Further, a cutout 47a is formed in the rear left side portion of the top wall 47 for insertion of the stay 25B supporting the receiver 25A, and the receiver 25A receives and holds the lateral conveying portion 25 of the grain discharging device 23.

[ Power section ]

As shown in fig. 2 and 6, the power unit 6 includes an exhaust gas treatment device 50 for purifying exhaust gas of the engine 5, a radiator 51 for radiating engine cooling water, a cooling fan 52 for cooling the radiator 51, and the like, in addition to the engine 5. The radiator 51 is disposed laterally outside (right side) of the machine body with respect to the engine 5.

The exhaust gas treatment device 50 purifies 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 at a position on the straw conveyor 8 side of the driver seat 30 in the left-right direction of the power unit 6. In the description, the exhaust gas treatment device 50 is disposed in a state of being located in front of the threshing device 7 and in a state of being located below the dust cover K with respect to the side plate 32. The exhaust gas treatment device 50 is disposed in a state in which the left and right ranges of the exhaust gas treatment device 50 overlap with the left and right ranges of the portion of the threshing device 7 on the grain box 9 side (right side) and in a state in which the longitudinal direction of the exhaust gas treatment device 50 is along the longitudinal direction of the machine body. The upper side of the exhaust gas treatment device 50 is covered with the side plate 32 and the dust cover K, so that the straw chips and the like do not fall onto the exhaust gas treatment device 50.

An upward-facing discharge tube 50a is provided at an upper peripheral portion of the rear side of the exhaust gas treatment device 50. The discharge tube 50a of the exhaust gas treatment device 50 extends obliquely upward (obliquely upward right) toward the grain box 9 side (right side) in the left-right direction of the machine body. The intermediate portion is curved so as to be directed rearward, and is configured to be discharged toward the exhaust pipe 53. That is, the discharge tube 50a is formed as a curved tube that forms a curved 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 tube 50a is guided to flow toward the rear of the machine body by the exhaust pipe 53, and is discharged to the rear of the machine body. The structure of the exhaust pipe 53 is 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 cover 58 located on the right side. The top plate 55, the front plate 56, the rear plate 57, and the dust cover 58 are integrally connected to each other, and are rotatably supported by the frame 1 about a lower-end front-rear axis X2 (see arrow in fig. 6) between a proper installation state (see fig. 6) and a reclining open state (not shown). In an appropriate mounted state, the side plate 32 is fixed to the top plate 55 by a locking mechanism, not shown. The rear plate 57 has a structure divided from left to right, in which only the right portion 57a can be integrally rotated, and the left portion 57b is fixedly supported.

The dust cover 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 a porous air introduction portion 60 having a large area is formed on the outer side surface and the inner side surface facing the driver seat 30 so that outside air is introduced as cooling air and no straw chips or the like intrude. 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, an oil cooler 62 for cooling the working oil by the cooling air ventilated by the cooling fan 52 and a fuel cooler 63 for cooling the fuel of the engine 5 are provided on the inner side (power unit side) of the housing 58 in correspondence with the ventilation opening 61. As shown in fig. 7, the oil cooler 62 and the fuel cooler 63 are mounted on the dust cover 58 in a state of being mounted in advance on a support frame 65 formed by connecting a plurality of stays 64 in a rectangular frame shape.

In the support frame 65, upper and lower 2 longitudinal stays 64b are connected as a plurality of stays 64 across the upper and lower 2 longitudinal stays 64a at intervals. A large-sized oil cooler 62 is mounted across the upper and lower 2 front-rear direction stays 64a, and a small-sized fuel cooler 63 is mounted across the upper and lower 2 longitudinal stays 64b. Both side end portions of the up-down 2 front-rear direction stay 64a are connected to the peripheral edge portion of the ventilation opening 61 formed in the inner side surface of the dust cover 58 by bolts. The 4 bolts Bo use standard same kind bolts. According to the above-described structure, the oil cooler 62 and the fuel cooler 63 can be easily assembled and disassembled by only 4 bolts Bo.

Therefore, the dust cover 58 has the following structure: the air intake from the right side of the power unit 6 is allowed by the operation of the cooling fan 52 while preventing the passage of dust. Even when the operation of the cooling fan 52 is stopped, the opening 61 for ventilation of the dust cover 58 is covered with the oil cooler 62, the fuel cooler 63, and the like, so that 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 to the outside of the machine body and is switched to the reclining open state, the power unit 6 is opened to the outside, and maintenance work of the power unit 6 can be easily performed. In this reclining open state, the hydraulic oil cooler 62 and the fuel cooler 63 can be detached integrally by releasing the support frame 65 from the fixation.

[ Structure for air intake of Engine ]

An air cleaner 66 for an engine and a prefilter 67 for an engine are provided behind the driver seat 30. As shown in fig. 1 and 2, an air cleaner 66 and a prefilter 67 are provided in the front-rear intermediate portion between the driver seat 30 and the grain box 9, which are arranged in the front-rear direction. The air cleaner 66 is formed in a substantially cylindrical shape, and is disposed at a position immediately behind the driver seat 30 in a lateral posture so that the longitudinal direction thereof is along the left-right direction.

The pre-cleaner 67 is provided at a position directly above the air cleaner 66 and at a position between the driver seat 30 and the grain box 9 higher than the driver seat 30. The air cleaner 66 and the prefilter 67 are connected by a straight pipe-shaped connecting pipe 75 extending in the up-down direction. The prefilter 67 is provided in a state where the suction port 67a is located between the upper end portion of the grain box 9 and the upper end portion of the dust cover 58 in a side view. In the explanation, the prefilter 67 is formed in a substantially cylindrical shape having an axial core in the up-down direction, and has a dimension in the up-down direction shorter than the lateral width (diameter). The prefilter 67 is provided at a position immediately behind the driver seat 30 in plan view, and is provided at a position corresponding to a substantially central position of the left-right width of the driver seat 30 in the vertical direction (intermediate position of the lateral width).

As shown in fig. 1, 2, 6, and 8, the first stay 68 for supporting the rear portion of the cab 4 is provided in a state of being erected from the frame 1. A prefilter 67 and an air cleaner 66 are supported by the first support 68. As shown in fig. 6, a mounting plate 69 welded to the lower end of the first stay 68 is connected to the frame 1 by bolts. The first support column 68 is formed in a square tubular shape and extends upward from the mounting plate 69. A second support 70 is provided on the left side of the first support 68. The second support column 70 extends upward by being fastened and fixed to the frame 1 by bolts, as in the first support column 68, to an attachment plate 71 welded to the lower end portion. The second support post 70 is formed shorter than the first support post 68.

A first mounting base 72 having a lateral plate shape is welded and fixed to the upper and lower intermediate positions of the first support column 68. The air cleaner 66 is mounted and supported on the first mounting base 72, and is coupled thereto by bolts. A second mounting base 73 having a lateral plate shape is welded and fixed to the upper end portion of the first support column 68. The support arm 74 for supporting the prefilter 67 is placed on the second mounting table 73 and is coupled by bolts.

A support bracket 76 made of angle steel having a substantially L-shaped cross section is welded to each of the left and right side surfaces and the front side surface at a position slightly below the first mounting base 72 at a position intermediate between the upper and lower positions of the first support column 68. The second support column 70 extends vertically to the same height as the support brackets 76, and a support bracket 77 made of angle steel is welded to the right side surface of the upper end portion thereof so as to extend rightward. A support bracket 78 made of angle steel is also welded to the front side surface of the second support post 70.

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

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

In the above configuration, as shown in fig. 8, the air cleaner 66, the pre-cleaner 67, the first support column 68, and the second support column 70 can be attached to the machine body in a state where the respective sub-assemblies are assembled in advance, and thus the assembling workability can be improved.

[ exhaust pipe ]

The exhaust pipe 53 is 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 tube 50a of the exhaust gas treatment device 50 to the inlet 80 on the front side on one end side and to discharge the exhaust gas from the exhaust port 81 on the rear side on 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 discussed in detail, the exhaust pipe cover 82 is supported by being bolted 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 over the entire length of the exhaust pipe cover 82 between the exhaust pipe cover 82 and the right side wall 7A of the threshing device 7 and between the exhaust pipe cover 82 and the grain box 9, so that stalk pieces 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 inclined downward toward the left and right side end portions. Left and right sides connected to the upper surface are formed as vertical surfaces extending in the up-down direction. Thus, the exhaust duct cover 82 does not accumulate straw chips and the like on the upper side as much as possible. The exhaust pipe cover 82 is provided with a support bracket 83 at a distance from the exhaust pipe 53, and thereby has a function of insulating heat so that hot air at a high temperature in the exhaust pipe 53 is not transmitted to the threshing device 7 and the grain box 9.

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

As shown in fig. 1 and 2, the exhaust port 81 of the exhaust pipe 53 is located on the front side of the rear end portion of the grain box 9. The exhaust pipe 53 is located at a position lower than the upper end of the threshing device 7 at a position forward of the front-rear middle part, and is located at a position higher than the upper end of the threshing device 7 at a position rearward of the front-rear middle part. The air outlet 81 is located at a position higher than the upper end of the threshing device 7 and at a position lower than the upper end of the grain box 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 introducing air is formed at the 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 front 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 overlaps with the front end portion of the second exhaust pipe 53B with a gap 85 formed therebetween. According to this configuration, when the exhaust gas that is well discharged from the first exhaust pipe 53A passes through the connection portion 84, the external air is sucked from the gap 85 by the discharge effect, and the low-temperature external air merges with the high-temperature exhaust gas, so that the temperature of the exhaust gas discharged to the outside can be reduced.

As shown in fig. 2 and 9, the connection portion 84 between the first exhaust pipe 53A and the second exhaust pipe 53B is provided so as to be located on the lateral side of the portion where the thresher 17 is provided, i.e., the portion where the concave portion 22 is formed in the grain tank 9. That is, the first exhaust pipe 53A and the second exhaust pipe 53B are connected at positions corresponding to the concave portions 22 in the front-rear direction. With the above configuration, the concave portion 22 into which the thresher 17 enters is formed on the right outer side of the connecting portion 84, and thus the open space is formed, and low-temperature outside air is easily and efficiently sucked. The left outer side of the connection portion 84 is a free space above the threshing device 7, and is an open space.

An inlet 80 of the first exhaust pipe 53A is connected to a rear end of the exhaust tube 50a of the exhaust gas treatment device 50 in an overlapping manner with a gap therebetween. In the inlet portion 80, similarly to the connection portion 84 between the rear end portion of the first exhaust pipe 53A and the front end portion of the second exhaust pipe 53B, outside air is sucked from the gap, and low-temperature outside air merges with high-temperature exhaust gas, so that 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 the lower portion of the front portion 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 connected by a bolt to the right side wall 7A of the threshing device 7. Further, an attachment plate 88 welded and fixed to the lower portion of the rear portion of the first exhaust pipe 53A is connected to the front portion-side connecting stay 19 of the front and rear pair of connecting stays 19 that support the upper portion-side portion of the winnowing device 17 by bolts. Thus, the first exhaust pipe 53A is stably supported by the right side wall 7A of the threshing device 7 and the threshing device 17 at both front and rear side portions.

As shown in fig. 9, a mounting plate 89 welded and fixed to the lower portion of the second exhaust pipe 53B and having a lower end bent into a substantially L-shape is supported by being bolted to a support bracket 90 which is substantially L-shaped in front view and is bolted to the right side wall 7A of the threshing device 7. The mounting plate 89 is formed long in the front-rear direction, and both front and rear ends thereof are respectively 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 has a circular open structure in which a cylindrical pipe is cut in a direction orthogonal to the axial direction, and exhaust gas flowing through the exhaust pipe 53 and discharged from the exhaust port 81 is smoothly and straightly discharged rearward along the axial direction so that the flow is not disturbed.

[ other embodiments ]

(1) In the above embodiment, the following structure is adopted: the exhaust pipe 53 includes a first exhaust pipe 53A and a second exhaust pipe 53B, which are connected at positions corresponding to the recessed portion 22 of the grain tank 9, but may be connected at positions different from the recessed portion instead of this configuration.

(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 grain box, but a structure without such 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 full-feed combine besides a half-feed combine, is not limited to a combine, and can be applied to a harvester for harvesting other crops.

Second embodiment:

the manner in which the present invention can be practiced is described based on the drawings. In the following description, the machine body travel direction in the working state is defined when the front-rear direction of the machine body is defined, and the left-right direction is defined when the left-right direction of the machine body is defined while being viewed from the machine body travel direction. That is, the direction indicated by reference numeral "F" in fig. 12 and 13 is the body front side, and the direction indicated by reference numeral "B" in fig. 12 and 13 is the body rear side. The direction indicated by reference numeral "L" in fig. 13 is the left side of the machine body, and the direction indicated by reference numeral "R" in fig. 13 is the right side of the machine body.

[ integral Structure of combine harvester ]

Fig. 12 and 13 show a half-feed combine as an example of a harvester. In the combine harvester, a harvesting part 3 serving as a harvesting part for harvesting upright stalks is arranged in front of a travelling body provided with a frame 1 and a pair of left and right crawler travelling devices 2. A driving unit 4 for a driver to ride is provided on the rear side of the harvesting unit 3 and on the right side of the front part of the traveling machine body. A power unit 6 that houses the engine 5 is provided below the driving unit 4. A threshing device 7 for threshing the harvested cornstalks is arranged behind the harvesting part 3. A grain-stalk conveying apparatus 8 as a crop conveying apparatus that conveys the harvested grain stalks from the harvesting section 3 toward the threshing apparatus 7 is provided across the harvesting section 3 and the threshing apparatus 7. The grain box 9 for storing the grains after threshing is provided in a state of being aligned in the left-right direction with the threshing device 7.

As shown in fig. 12 and 20, the upper portion of the thresher 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. In each of the pair of connecting stays 19, one end is connected to the outer peripheral portion of the threshing 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, an extension 20 extending toward the threshing device 7 is formed at an upper portion of the threshing device 7 on the front side of the grain box 9, and a recessed space 21 recessed toward the inside of the box is formed below the extension 20. By providing the protruding portion 20 in this manner, 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 vertically long concave portion 22 into which the thresher 17 enters is formed at a position corresponding to the thresher 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 for discharging grains in the grain tank 9 to the outside is provided. The grain discharging device 23 includes: a vertical conveying unit 24 for conveying grains in the grain box 9 upward, and a horizontal conveying unit 25 for conveying grains from the vertical conveying unit 24 to the outside of the machine body. The grain discharging device 23 is configured to be rotatable about an upper and lower axial center (axial center of the vertical conveying portion 24) Z1 by an electric motor 26. The lateral conveying unit 25 is configured to be capable of swinging up and down around a lateral axis X1 of the end portion on the longitudinal conveying unit 24 side by a hydraulic cylinder 27.

[ driver's part ]

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

The side panel 32 is provided on the left side, which is the side where the straw conveying device 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, a sub 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 auxiliary shift lever 36 are disposed in a laterally aligned state at the front portion 32A of the side plate 32, the clutch lever 37 is disposed at the front-rear intermediate portion 32B of the side plate 32, and the grain discharge operation portion 38 is disposed at the rear portion 32C of the side plate 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 surface portion of the front-rear intermediate portion 32B of the side panel 32 is set at a higher position than the front portion 32A, and the upper surface portion of the rear portion 32C of the side panel 32 is set at a higher position than the front-rear intermediate portion 32B.

[ dustproof Structure of threshing inlet ]

As shown in fig. 13, an inlet plate 45 is provided at a front side portion of the threshing device 7, and the inlet plate 45 receives the spike tip side of the harvested stalks transferred from the stalk conveyor 8 and conveyed by the feed chain 16 with the root side interposed therebetween, and is configured to guide downward toward the supply port 44, so that the spike tip side of the harvested stalks is received and guided by the inlet plate 45 and supplied from the supply port 44 of the threshing device 7 into the threshing chamber.

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

[ Power section ]

As shown in fig. 13 and 17, the power unit 6 includes an exhaust gas treatment device 50 for purifying exhaust gas of the engine 5, a radiator 51 for radiating engine cooling water, a cooling fan 52 for cooling the radiator 51, and the like, in addition to the engine 5. The radiator 51 is disposed laterally outside (right side) of the machine body with respect to the engine 5.

The exhaust gas treatment device 50 purifies 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 at a position on the straw conveyor 8 side of the driver seat 30 in the left-right direction of the power unit 6. In the description, the exhaust gas treatment device 50 is disposed in a state of being located in front of the threshing device 7 and in a state of being located below the dust cover K with respect to the side plate 32. The exhaust gas treatment device 50 is disposed in a state in which the left and right ranges of the exhaust gas treatment device 50 overlap with the left and right ranges of the portion of the threshing device 7 on the grain box 9 side (right side) and in a state in which the longitudinal direction of the exhaust gas treatment device 50 is along the longitudinal direction of the machine body. The upper side of the exhaust gas treatment device 50 is covered with the side plate 32 and the dust cover K, so that the straw chips and the like do not fall onto 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 cover 58 located on the right side. The top plate 55, the front plate 56, the rear plate 57, and the dust cover 58 are integrally connected to each other, and are rotatably supported by the frame 1 about a lower-end front-rear axis X2 (see arrow in fig. 17) between a proper installation state (see fig. 17) and a reclining open state (not shown). In an appropriate mounted state, the side plate 32 is fixed to the top plate 55 by a locking mechanism, not shown. The rear plate 57 has a structure divided from left to right, in which only the right portion 57a can be integrally rotated, and the left portion 57b is fixedly supported.

As shown in fig. 17, an oil cooler 62 for cooling the working oil by the cooling air ventilated by the cooling fan 52 and a fuel cooler 63 for cooling the fuel of the engine 5 are provided on the inner side (power unit side) of the housing 58 in correspondence with the ventilation opening 61. As shown in fig. 18, the oil cooler 62 and the fuel cooler 63 are mounted on the dust cover 58 in a state of being mounted in advance on a support frame 65 formed by connecting a plurality of stays 64 in a rectangular frame shape.

[ Structure for air intake of Engine ]

An air cleaner 66 for an engine and a prefilter 67 for an engine are provided behind the driver seat 30. As shown in fig. 12 and 13, an air cleaner 66 and a prefilter 67 are provided in the front-rear intermediate portion between the driver seat 30 and the grain box 9, which are arranged in the front-rear direction. The air cleaner 66 is formed in a substantially cylindrical shape, and is disposed at a position immediately behind the driver seat 30 in a lateral posture so that the longitudinal direction thereof is along the left-right direction.

As shown in fig. 12, 13, 17, and 19, the first stay 68 for supporting the rear portion of the cab 4 is provided in a state of being erected from the frame 1. A prefilter 67 and an air cleaner 66 are supported by the first support 68. As shown in fig. 17, a mounting plate 69 welded to the lower end of the first stay 68 is connected to the frame 1 by bolts. The first support column 68 is formed in a square tubular shape and extends upward from the mounting plate 69. A second support 70 is provided on the left side of the first support 68. The second support column 70 extends upward by being fastened and fixed to the frame 1 by bolts, as in the first support column 68, to an attachment plate 71 welded to the lower end portion. The second support post 70 is formed shorter than the first support post 68.

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

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

In the above configuration, as shown in fig. 19, the air cleaner 66, the pre-cleaner 67, the first support column 68, and the second support column 70 can be attached to the machine body in a state where the respective sub-assemblies are assembled in advance, and thus the assembling workability can be improved.

[ exhaust pipe ]

The exhaust pipe 53 is 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 tube 50a of the exhaust gas treatment device 50 to the inlet 80 on the front side on one end side and to discharge the exhaust gas from the exhaust port 81 on the rear side on 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 discussed in detail, the exhaust pipe cover 82 is supported by being bolted 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 over the entire length of the exhaust pipe cover 82 between the exhaust pipe cover 82 and the right side wall 7A of the threshing device 7 and between the exhaust pipe cover 82 and the grain box 9, so that stalk pieces and the like can be dropped.

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

As shown in fig. 12 and 13, the exhaust port 81 of the exhaust pipe 53 is located on the front side of the rear end portion of the grain box 9. The exhaust pipe 53 is located at a position lower than the upper end of the threshing device 7 at a position forward of the front-rear middle part, and is located at a position higher than the upper end of the threshing device 7 at a position rearward of the front-rear middle part. The air outlet 81 is located at a position higher than the upper end of the threshing device 7 and at a position lower than the upper end of the grain box 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 introducing air is formed at the 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 front 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 overlaps with the front end portion of the second exhaust pipe 53B with a gap 85 formed therebetween. According to this configuration, when the exhaust gas that is well discharged from the first exhaust pipe 53A passes through the connection portion 84, the external air is sucked from the gap 85 by the discharge effect, and the low-temperature external air merges with the high-temperature exhaust gas, so that the temperature of the exhaust gas discharged to the outside can be reduced.

As shown in fig. 13 and 20, the connection portion 84 between the first exhaust pipe 53A and the second exhaust pipe 53B is provided so as to be located on the lateral side of the portion where the thresher 17 is provided, i.e., the portion where the concave portion 22 is formed in the grain tank 9. That is, the first exhaust pipe 53A and the second exhaust pipe 53B are connected at positions corresponding to the concave portions 22 in the front-rear direction. With the above configuration, the concave portion 22 into which the thresher 17 enters is formed on the right outer side of the connecting portion 84, and thus the open space is formed, and low-temperature outside air is easily and efficiently sucked. The left outer side of the connection portion 84 is a free space above the threshing device 7, and is an open space.

An inlet 80 of the first exhaust pipe 53A is connected to a rear end of the exhaust tube 50a of the exhaust gas treatment device 50 in an overlapping manner with a gap therebetween. The connection portion also sucks in outside air from the gap, and the low-temperature outside air merges with the high-temperature exhaust gas, similarly to the connection portion 84 of the rear end portion of the first exhaust pipe 53A and the front end portion of the second exhaust pipe 53B, whereby the temperature of the exhaust gas to be discharged can be reduced.

As shown in fig. 20, an attachment plate 86 welded and fixed to the lower portion of the front portion 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 connected by a bolt to the right side wall 7A of the threshing device 7. Further, an attachment plate 88 welded and fixed to the lower portion of the rear portion of the first exhaust pipe 53A is connected to the front portion-side connecting stay 19 of the front and rear pair of connecting stays 19 that support the upper portion-side portion of the winnowing device 17 by bolts. Thus, the first exhaust pipe 53A is stably supported by the right side wall 7A of the threshing device 7 and the threshing device 17 at both front and rear side portions.

As shown in fig. 20, a mounting plate 89 welded and fixed to the lower portion of the second exhaust pipe 53B and having a lower end bent into a substantially L-shape is supported by being bolted to a support bracket 90 which is substantially L-shaped in front view and is bolted to the right side wall 7A of the threshing device 7. The mounting plate 89 is formed long in the front-rear direction, and both front and rear ends thereof are respectively 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-cleaner 67 is provided in a state where the suction port 67a is located between the upper end of the grain box 9 and the upper end of the dust cover 58 in a side view, but instead of this, the pre-cleaner 67 may be provided above the upper end of the grain box 9, or the pre-cleaner 67 may be provided below the upper end of the dust cover 58.

(2) In the above-described embodiment, the pre-cleaner 67 and the air cleaner 66 are supported by the first support 68 that supports the rear portion of the driver 4, but instead of this, the pre-cleaner 67 and the air cleaner 66 may be supported by separate supports, or the pre-cleaner 67 and the air cleaner 66 may be supported by dedicated support members instead of the support that supports the rear portion of the driver 4.

(3) In the above embodiment, the following structure is adopted: the air cleaner 66 is provided at a position immediately behind the driver seat 30, the pre-cleaner 67 is provided at a position immediately 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 the following structure may be adopted instead of this: the air cleaner 66 is provided at a position different from the position immediately behind the driver seat 30, such as a position below the driver seat 30, a position on the right and left lateral sides, and the like, 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-cleaner 67 and the air cleaner 66 are provided in a state of being located on the front side of the first support 68, but instead of this, the pre-cleaner 67 and the air cleaner 66 may be provided in a state of being located on the rear side of the first support 68.

(5) In the above embodiment, the dust cover K has the top wall 47 and the longitudinal wall 48 extending in the longitudinal posture in a state where the front side edge portion and the left side edge portion of the top wall 47 are connected downward, but the following configuration may be adopted instead of this configuration: the structure may be such that the top wall portion 47 is provided only without the longitudinal wall portion 48, and the longitudinal wall portion may be formed of a soft sheet member (projection) throughout the entire vertical width, or the structure may be such that the top wall portion is provided, the upper portion is made of a hard wall material connected to the top wall portion, and the lower portion is made of a soft sheet member.

Industrial applicability

The invention can be applied to the half-feeding combine harvester and the whole-feeding combine harvester, the corn harvester and other harvesters.

Claims

1. A harvester is provided with:

the harvesting part is arranged at the front part of the machine body and is used for harvesting crops;

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

an upper open-type driving unit disposed behind the harvesting unit in a state of being laterally aligned with 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 box provided in a state of being transversely aligned with the threshing unit at the rear of the driving unit, and storing grains obtained by threshing; and

a power unit which is provided below the driving unit and accommodates an engine,

the driving section is provided with a driving seat and a side panel positioned on the crop conveying section side in the left-right direction relative to the driving seat,

an exhaust gas treatment device for treating the exhaust gas of the engine is provided at a position of the power unit on the crop transport unit side with respect to the driver seat in the left-right direction,

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

a pre-cleaner is provided at a position immediately behind the driver seat and between the driver seat and the grain box at a position higher than the driver seat.

2. The harvester of claim 1, wherein,

an air cleaner is provided at a position immediately behind the driver seat, and the pre-cleaner is provided at a position immediately above the air cleaner.

3. The harvester of claim 2, wherein,

the prefilter and the air cleaner are connected by a straight pipe-shaped connecting pipe.

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

the support column for supporting the rear part of the driving part is arranged in a state of standing from the frame,

the pre-cleaner and the air cleaner are supported by the pillar.

5. The harvester of claim 4, wherein,

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

6. A harvester according to any one of the claim 1 to 3, wherein,

a dust-proof case is provided at a position facing the lateral outside of the power unit, the dust-proof case allowing air to flow into the power unit and restricting air discharge,

the prefilter is provided in a state in which the suction port is located between the upper end portion of the grain tank and the upper end portion of the dust cover in a side view.