Combine harvester

Abstract

A space between a threshing device and a grain tank can be utilized as a space for arranging an exhaust pipe, and the exhaust pipe can be easily cooled. The exhaust pipe (46) includes a raised portion (50) raised at a position higher than a threshing main body (15A) at a front portion of the exhaust pipe (46), and a rearward extending portion (51) extending rearward from the raised portion (50) through a space between the threshing device (15) and the grain tank at a height position corresponding to between an upper end (T1) of the threshing main body (15A) and an upper end (T2) of a top plate portion (15B).

Description

Technical Field

[0001] This invention relates to combine harvesters. Background Technology

[0002] A combine harvester exists comprising: a harvesting section located at the front of the traveling body for harvesting crops from a field; a threshing unit for threshing the crops harvested by the harvesting section, having a threshing body and a top plate covering the threshing body from above; and a grain bin arranged laterally with the threshing unit for storing the grains obtained by the threshing unit. In this combine harvester, for example as shown in Patent Document 1, an exhaust pipe for discharging engine exhaust is provided, extending rearward through the space between the threshing unit and the grain bin.

[0003] Existing technical documents

[0004] Patent documents

[0005] Patent Document 1: Japanese Patent Application Publication No. 2015-128414 Summary of the Invention

[0006] The problem that the invention will solve

[0007] As described above, if the space between the threshing device and the grain bin is used as space for the installation of the exhaust pipe, and the heat dissipation of the exhaust pipe is concentrated between the threshing device and the grain bin, the exhaust pipe will be difficult to cool.

[0008] The present invention provides a combine harvester that can utilize the space between the threshing device and the grain bin as space for the installation of an exhaust pipe and facilitates cooling of the exhaust pipe.

[0009] Methods for solving problems

[0010] The combine harvester of the present invention comprises: a harvesting section disposed at the front of a traveling body for harvesting crops in a field; a threshing device for threshing the crops harvested by the harvesting section, and having a threshing body and a top plate covering the threshing body from above; a grain bin arranged laterally with the threshing device for storing grains obtained by the threshing device; an engine; and an exhaust pipe for discharging exhaust from the engine, the exhaust pipe comprising: an upright portion erected at a position higher than the threshing body at the front of the exhaust pipe; and a rearwardly extending portion extending rearward from the upright portion at a height corresponding to the upper end of the threshing body and the upper end of the top plate through the space between the threshing device and the grain bin.

[0011] According to this configuration, the rearward extension of the exhaust pipe is located in the space between the threshing device and the grain box, where the heat dissipation of the exhaust pipe can be easily discharged upwards. Therefore, the front part of the exhaust pipe is further raised to a position higher than the threshing body, which can lengthen the length of the rearward extension. Thus, the space between the threshing device and the grain box can be utilized as a space for the installation of the exhaust pipe and the exhaust pipe can be easily cooled.

[0012] In this invention, preferably, the threshing device includes: a threshing section; a sorting section that performs sorting processing to separate the threshed material obtained by the threshing section into grains and dust; and a secondary return device disposed in the space between the threshing device and the grain bin, which returns the secondary processed material obtained by the sorting section to the sorting section, wherein the upright section is erected at a forward position than the secondary return device and overlaps with the secondary return device when viewed along the front-rear direction of the machine body.

[0013] According to this configuration, since the secondary processed material is returned to the sorting section, the upright part at the front of the exhaust pipe is located in front of the secondary return device, which is located at the position corresponding to the front of the threshing device at the conveying terminal section. Therefore, the length of the rearward extension of the part that is easy to discharge through heat dissipation can be increased, and the exhaust pipe can be cooled more easily.

[0014] In this invention, it is preferable that a curved portion is provided at the upper end of the erected portion, the curved portion bends backward and is connected to the backward extension portion.

[0015] According to this configuration, the exhaust from the upright part flows smoothly to the rearward extension part through the curved part, so the exhaust will not be retained in the exhaust pipe, the temperature rise of the exhaust pipe can be suppressed, and the exhaust pipe can be easily cooled.

[0016] In this invention, it is preferred that the rearward extension portion is provided with a rearwardly upward inclined portion and a horizontal portion, the rearwardly upward inclined portion extending in a rearwardly upward inclined posture from the curved portion, and the horizontal portion extending rearwardly in a horizontal posture from the rearwardly upward inclined portion.

[0017] According to this configuration, since the exhaust from the curved part of the upright part flows smoothly into the rearward extension part through the rearward and upward inclined part, the exhaust will not be retained in the exhaust pipe, the temperature rise of the exhaust pipe can be suppressed, and the exhaust pipe can be easily cooled.

[0018] In this invention, it is preferable that the rearwardly upward inclined portion is formed with an injection portion for introducing external air from the exhaust pipe into the interior of the exhaust pipe.

[0019] According to this configuration, in the rearward and upward inclined section where exhaust flows smoothly, external air from the exhaust pipe is introduced by the injection section. Therefore, air can be smoothly introduced from the outside to the inside of the exhaust pipe to efficiently cool the exhaust, and the exhaust pipe can be easily cooled.

[0020] In this invention, preferably, the rear end of the exhaust pipe is bent upwards, and an exhaust port is provided at the rear end at a position higher than the top plate.

[0021] According to this configuration, since the exhaust gas discharged from the exhaust pipe is discharged to a higher position, it is possible to prevent the exhaust gas discharged from the exhaust pipe from flowing down into the field.

[0022] In this invention, preferably, a bulging portion is provided on the side wall of the grain bin on the threshing device side, bulging toward the threshing device, and the rearward extension passes above the bulging portion.

[0023] According to this configuration, since the heat dissipation of the rearward extension is easily discharged upward, it is possible to prevent the temperature rise of the bulge caused by the heat dissipation of the exhaust pipe, and the capacity of the grain bin is increased by utilizing the bulge. Attached Figure Description

[0024] Figure 1 This is a left-side view showing the overall structure of the combine harvester.

[0025] Figure 2 This is a right-side view showing the overall structure of the combine harvester.

[0026] Figure 3 This is a top view showing the overall structure of a combine harvester.

[0027] Figure 4 This is a rear view of a combine harvester.

[0028] Figure 5 This is a right-side view showing the exhaust pipe and its cover.

[0029] Figure 6 This is a right-side view showing the support structure of the exhaust pipe.

[0030] Figure 7 yes Figure 5 Section VII-VII is shown in the view.

[0031] Figure 8 yes Figure 5 Section VIII-VIII is shown in the view.

[0032] Figure 9 This is a top view showing the exhaust pipe and its cover.

[0033] Figure 10This is a left-side view showing the support structure of the front cover, middle cover, and rear cover.

[0034] Figure 11 This is a right-side view showing the support structure of the middle cover and the rear cover.

[0035] Figure 12 It is a perspective view showing the first support component, the second support component, the third support component, the first retainer, the second retainer, the third retainer, the front cover, the middle cover, and the rear cover in the removed state.

[0036] Figure 13 It is a perspective view showing the first support component, the second support component, the third support component, the front cover, the middle cover, and the rear cover in the removed state.

[0037] Explanation of reference numerals in the attached figures

[0038] 2. Running machine body

[0039] 6A Cutting Section

[0040] 9 Engines

[0041] 15 Threshing device

[0042] 15A Threshing Body

[0043] 15B Top Plate Section

[0044] 16 Grain bins

[0045] 31 Threshing section

[0046] 35 sorting section

[0047] 42 Secondary return device

[0048] 46 Exhaust pipe

[0049] 50 Erecting section

[0050] 50a Bend

[0051] 51 Rearward Extension

[0052] 51k tilted upwards and backwards

[0053] 51s Horizontal section

[0054] 52 Drum section

[0055] 55. Jet section (second jet section)

[0056] 57 Rear end

[0057] 58 Exhaust port

[0058] 75. Upper Cover (Upper Cover Section)

[0059] 76. Horizontal Cover (Left Horizontal Cover Section)

[0060] The upper end of the T1 threshing body

[0061] The upper end of the top plate of T2 Detailed Implementation

[0062] Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.

[0063] Additionally, in the following description, the running gear of the combine harvester will be... Figure 1 , 2 As shown in Figure 3, arrow F points in the direction of "front of the aircraft" and arrow B points in the direction of "rear of the aircraft". Figure 1 , 2 As shown in Figure 4, set the direction of arrow U to "above the body" and the direction of arrow D to "below the body". Figure 3 , 4 The direction of arrow L is set to "left side of the aircraft", and the direction of arrow R is set to "right side of the aircraft".

[0064] [The overall structure of a combine harvester]

[0065] like Figure 1 , 2As shown in Figures 3 and 4, the combine harvester has a traveling body 2 supported by a pair of left and right tracked traveling devices 1. The traveling body 2 has a frame 3 formed by connecting multiple steel materials such as square tubing. The tracked traveling devices 1 are located at the lower part of the frame 3. A driver's unit 4, a power unit 5, and a cutting and conveying unit 6 are provided at the front of the traveling body 2. The driver's unit 4 and the power unit 5 are located at one lateral end of the front of the traveling body 2, and the cutting and conveying unit 6 is located on the opposite side of the front of the traveling body 2. The driver's unit 4 is provided with a driver's seat 7 and a sunshade 8 covering the passenger space. The power unit 5 is provided with an engine 9. The cutting and conveying unit 6 is provided with a cutting section 6A located at the front of the cutting and conveying unit 6 and a feeder 10 extending rearward from the rear of the cutting section 6A. In the harvesting section 6A, the tips of the ears of crops such as rice and wheat in the field are harrowed backward by a rotating reel 11. The roots of the harrowed crops are cut by a pusher-type harvesting device 12 to harvest the crops. The harvested crops are then transported laterally by a transverse conveying auger 13 to the feeding section of the feeder 10. The feeder 10 receives the crops from the transverse conveying auger 13 and transports the received crops backward and upward. A dust removal device 10A is provided in the feeder 10. This dust removal device 10A draws out dust such as broken stalks mixed in with the transported crops through the airflow generated by a rotating fan. The harvesting and conveying section 6 is oscillating and lifting between a lowering working state and an upward non-working state by the telescopic operation of a lifting cylinder 14 connected to the lower part of the feeder 10. A threshing device 15 and a grain bin 16 are supported in a transverse arrangement at the rear of the machine frame 3. The threshing device 15 is located behind the feeder 10. The grain bin 16 is located behind the driver's unit 4. A threshing hood 17 is provided on the lateral outer side of the threshing device 15. The threshing hood 17 is configured to be divided into multiple dividing hoods. A bin cover 18 is provided on the lateral outer side of the lower part of the grain bin 16. The threshing device 15 receives the crop from the feeder 10 and performs threshing processing, separating the grains obtained through threshing from dust such as broken stalks. The threshing device 15 is configured as a whole-stalk feeding type, in which the entire plant from the root of the harvested stalk to the tip of the ear is fed into the threshing chamber. The grain bin 16 collects and stores the grains sorted by the threshing device 15. A grain discharge device 19 is connected to the rear of the grain bin 16 to discharge the grains stored in the grain bin 16. The grain bin 16 is supported so that it can swing with the shaft of the longitudinal conveying section 19A of the grain discharge device 19 as the pivot point, and can switch between a maintenance open position extending laterally outward to the traveling body 2 and a work closed position located in a forward-backward orientation behind the driving section 4.

[0066] like Figure 2 , 4As shown, a narrow lower section, which becomes narrower towards the bottom, is provided in the lower part of the grain bin 16. A toolbox 26 is provided in the space between the narrow lower section on the outer side of the machine body and the bin cover 18. The toolbox 26 is supported by the right-side inclined wall of the grain bin 16.

[0067] [Composition of the grain discharge device]

[0068] like Figure 2 , 3 As shown, the grain discharge device 19 has a longitudinal conveying section 19A extending vertically along the body behind the grain bin 16, and a transverse conveying section 19B extending vertically from the upper end of the longitudinal conveying section 19A. The lower part of the longitudinal conveying section 19A is connected to the lower rear part of the grain bin 16 via a connecting housing 20. The longitudinal conveying section 19A receives grains discharged from the grain bin 16 into the connecting housing 20 and conveys the received grains. The grains are discharged from the grain bin 16 via a bottom screw (not shown) located in the bottom of the grain bin 16. The transverse conveying section 19B receives the grains conveyed by the longitudinal conveying section 19A and conveys the received grains laterally, discharging them from a discharge cylinder 22 located at the extended end of the transverse conveying section 19B.

[0069] like Figure 1 , 2 As shown in Figure 4, a rotary drive mechanism 23 is connected to the middle section of the longitudinal conveying section 19A. The rotary drive mechanism 23 is covered by a cover 24. The transverse conveying section 19B is rotated relative to the connecting housing 20 via the rotary drive mechanism 23 through the longitudinal conveying section 19A, and is rotated around the axis of the longitudinal conveying section 19A as the center of rotation. Figure 2 , 3 As shown, an undulating cylinder 25 is connected to the base of the transverse conveying section 19B. The transverse conveying section 19B is oscillating up and down relative to the longitudinal conveying section 19A by the extension and retraction of the undulating cylinder 25.

[0070] [Composition of the threshing device]

[0071] Threshing device 15 Figure 4 , 5 As shown, the threshing body 15A has a threshing main body 15A and a top plate portion 15B covering the threshing main body 15A from above. The threshing main body 15A has a threshing frame composed of left and right side walls 30, etc. The threshing main body 15A is configured such that the upper end of the side wall 30 becomes the upper end T1 of the threshing main body 15A. The top plate portion 15B is as follows... Figure 3 , 4 As shown in Figures 7 and 8, the top plate body 36 is arc-shaped when viewed from the front and rear directions, a front wall plate 37 connected to the front end of the top plate body 36, and a rear wall plate 38 connected to the rear end of the top plate body 36.

[0072] The threshing device 15 includes a threshing section 31 formed throughout the threshing body 15A and the top plate 15B, and a sorting section 35 formed below the threshing section 31.

[0073] Threshing section 31 Figure 7 As shown, the threshing chamber 32 includes a threshing cylinder 33 rotatably disposed within the threshing chamber 32 and a screen 34 disposed below the threshing cylinder 33. The threshing chamber 32 is formed by left and right side walls 30, a top plate 15B, and the screen 34. The threshing chamber 32 and the threshing cylinder 33 are not included in the threshing body 15A.

[0074] The sorting section 35 includes: a oscillating sorting device (not shown), which is sway-driven and disposed below the screen 34 to receive and screen the material falling through the screen 34; an air classifier (not shown) disposed in front of and below the oscillating sorting device and supplying sorting air to the oscillating sorting device; and a primary screw 39 (see reference). Figure 5 The secondary screw 40, located below the oscillating sorting device, conveys the primary processed material obtained through sorting to the lateral outer side of the grain bin side of the threshing device 15; Figure 5 Located behind the primary screw 39, it conveys the secondary processed material obtained through sorting to the outer side of the grain bin of the threshing device 15.

[0075] like Figure 4 , 5 As shown, a secondary return device 42 connected to the secondary screw 40 is located between the threshing device 15 and the grain bin 16. The secondary return device 42 extends forward and upward from the end of the secondary screw 40, and its conveying end opens towards the oscillating sorting device at the front of the threshing device 15. The secondary processed material discharged from the secondary screw 40 is returned by the secondary return device 42 to the front of the oscillating sorting device in the sorting section 35, where it is further processed by the oscillating sorting device for single-grain processing.

[0076] [Composition of the exhaust pipe]

[0077] like Figure 2 , 5 As shown, the engine 9 is located forward of the grain bin 16. An exhaust muffler 45, connected to the exhaust section 9a of the engine 9, is located on the left transverse side of the engine 9. An exhaust pipe 46 is connected to the exhaust pipe 45a at the rear of the exhaust muffler 45. The exhaust gas discharged from the engine 9 is guided into the exhaust muffler 45 for noise reduction, and the treated exhaust gas is discharged through the exhaust pipe 46 and then discharged to the outside of the vehicle body 2.

[0078] like Figure 5 , 6As shown in Figure 9, the exhaust pipe 46 extends in the front-to-back direction through the space between the threshing device 15 and the grain bin 16. In this embodiment, the exhaust pipe 46 extends in the front-to-back direction through a position in the space between the threshing device 15 and the grain bin 16 that is lower than the top plate portion 15B. Specifically, the exhaust pipe 46 extends in the front-to-back direction through a height position corresponding to the upper end T1 of the threshing body 15A and the upper end T2 of the top plate portion 15B in the space between the threshing device 15 and the grain bin 16.

[0079] For a more detailed description, exhaust pipe 46, as shown... Figure 5 , 6 As shown, it is divided into three sections along its length: a first section exhaust pipe 47, a second section exhaust pipe 48, and a third section exhaust pipe 49.

[0080] like Figure 5 , 6 As shown, the exhaust pipe 46 has an upright portion 50 that rises from the discharge cylinder 45a at the front of the exhaust pipe 46, and a rearward extension portion 51 that extends rearward from the upright portion 50.

[0081] Erect part 50 Figure 5 , 6 As shown, the erected portion 50 is positioned above the threshing device 15. In this embodiment, the erected portion 50 is positioned within the threshing device 15 higher than the threshing body 15A. Specifically, the threshing body 15A is configured such that the upper end of the sidewall 30 becomes the upper end T1 of the threshing body 15A. The erected portion 50 is positioned higher than the upper end T1. The erected portion 50 is as follows... Figure 5 , 6 As shown in Figure 8, it stands upright on the front side of the secondary return device 42 and overlaps with the secondary return device 42 when viewed in the front-rear direction of the machine body.

[0082] Rear extension 51 Figure 5 , 6 As shown in Figures 7 and 8, the height position corresponding to the upper end T1 of the threshing body 15A and the upper end T2 of the top plate 15B passes backward through the space between the threshing device 15 and the grain box 16.

[0083] like Figure 7 , 9 As shown, a bulge 52 protruding towards the threshing device side is provided on the side wall 16a of the grain bin 16, thereby increasing the capacity of the grain bin 16. The rearward extension 51 passes above the bulge 52.

[0084] like Figure 5 , 6As shown, a backward-curved portion 50a is provided at the upper end of the upright portion 50, and the upright portion 50 is connected to the backward-extending portion 51 by the curved portion 50a. The backward-extending portion 51 includes a backward-upward inclined portion 51k that extends backward in an upward-inward tilting posture from the curved portion 50a of the upright portion 50, and a horizontal portion 51s that extends backward in a horizontal posture from the backward-upward inclined portion 51k.

[0085] like Figure 5 , 6 As shown, a first injection section 53 is disposed at the lower part of the upright portion 50 to guide external air from the exhaust pipe 46 into the interior of the exhaust pipe 46. Specifically, the first injection section 53 is as follows: Figure 6 As shown, the lower part of the upright part 50 has a connecting part 54 that is externally connected to the exhaust cylinder 45a of the exhaust muffler 45, and a gap is provided between the connecting part 54 and the exhaust cylinder 45a to allow air to flow from the outside of the exhaust pipe 46 to the inside.

[0086] like Figure 5 , 6 As shown, a second injection section 55 is disposed in the exhaust pipe 46 at a position rearward of the front cover 71 covering the raised portion 50, which guides external air into the interior of the exhaust pipe 46. The second injection section 55 is as follows... Figure 6 As shown, a rearwardly upward inclined portion 51k is disposed in the rearward extension portion 51. Specifically, the rearwardly upward inclined portion 51k is formed throughout the first split exhaust pipe 47 and the second split exhaust pipe 48. The second injection portion 55 has a connecting portion 56 at the upstream end of the second split exhaust pipe 48, which is externally connected to the end of the first split exhaust pipe 47 on the side opposite to the exhaust muffler side. A gap is provided between the connecting portion 56 and the end of the first split exhaust pipe 47 to allow air to flow from the outside to the inside of the exhaust pipe 46.

[0087] like Figure 5 , 6 As shown, the rear end 57 of the exhaust pipe 46 curves upward, and an exhaust port 58 is provided at the rear end 57, positioned higher than the top plate portion 15B. Specifically, the upper part of the exhaust port 58 is positioned higher than the upper end T2 of the top plate portion 15B. The exhaust port 58 opens upward and backward. The exhaust port 58 is located rearward of the rear end of the threshing device 15 and the rear end of the grain bin 16.

[0088] [Exhaust pipe support]

[0089] Exhaust pipe 46 Figure 5 , 6As shown, the threshing device 15 is supported by a first retainer 61 that supports one part of the upright part 50, a second retainer 62 that supports the front and rear parts of the rearward and upward inclined part 51k, and a third retainer 63 that supports the front and rear parts of the horizontal part 51s.

[0090] Specifically, the first retaining element 61, as Figure 6 As shown, it is configured to connect to the rear of the erected part 50. The first retainer 61 is configured to be directly connected to the right side wall 30 of the threshing device 15. The connection of the first retainer 61 to the exhaust pipe 46 is made by welding. The connection of the first retainer 61 to the side wall 30 is made by connecting bolts.

[0091] The second retainer 62 in two locations and the third retainer 63 in three locations, as shown in the figure. Figure 5 , 6 As shown, it is configured to be connected to the lower part of the exhaust pipe 46 in a manner that supports the exhaust pipe 46 from below. The connection of each second retainer 62 and each third retainer 63 to the exhaust pipe 46 is made by welding.

[0092] The first of the two second retainers 62 is as follows: Figure 5 , 6 As shown, the second retainer 62 is configured to be directly connected to the right side wall 30 of the threshing device 15. The rearmost second retainer 62 of the two second retainers 62 and the frontmost third retainer 63 of the three third retainers 63 are configured to be connected to the front first support member 64 of the two front and rear portions of the first support member 64 erected on the upper part 30a of the right side wall 30 of the threshing device 15, and are connected to the right side wall 30 via the first support member 64. The second and third third retainers 63 of the three third retainers 63 are configured to be connected to the rearmost first support member 64 of the two front and rear portions of the first support member 64, and are supported on the right side wall 30 via the first support member 64. The front second retainer 62 is connected to the side wall 30 by a connecting bolt. The rear second retainer 62 and the three third retainers 63 are connected to the first support member 64 by connecting bolts on the exhaust pipe side portion 64a of the first support member 64.

[0093] [The composition of the exhaust pipe cover]

[0094] like Figure 5 , 9 As shown, the device is configured to have a cover 70 that covers the exhaust pipe 46, and the cover 70 prevents dust such as straw scraps from falling into the exhaust pipe 46.

[0095] If described in detail, such as Figure 5 , 9As shown in Figure 10, the cover 70 is provided with a front cover 71 covering the upright portion 50 of the exhaust pipe 46, a middle cover 72 covering the front portion of the rearward extension portion 51 of the exhaust pipe 46, and a rear cover 73 covering the rearward extension portion 51 on the rear side of the middle cover 72.

[0096] Front cover 71 Figure 5 , 9 As shown in Figures 10, 12, and 13, the device includes a front cover 71a that covers the raised portion 50 from the front, a left horizontal cover 71b that covers the raised portion 50 from the left horizontal side, and a right horizontal cover 71c that covers the raised portion 50 from the right horizontal side. Figure 5 , 10 As shown, the lower part of the front cover 71a is in a vertical position, and the upper part of the front cover 71a is in an inclined position that is further up and further back. The vertical length of the right horizontal cover 71c is longer than that of the left horizontal cover 71b.

[0097] The front cover 71 is configured to be supported on the threshing device 15. Specifically, as shown in the figure... Figure 12 , 13 As shown, the front cover 71 includes a first mounting portion 71d formed on the upper part of the front cover portion 71a and a second mounting portion 71e formed on the lower left side of the front cover portion 71a. Figure 12 , 13 As shown, a second support member 74 is erected on the upper part 30a of the right side wall 30 of the threshing device 15, further forward than the first support member 64 of the front and rear parts. Figure 9 , 10 As shown, the first mounting portion 71d is configured to be mounted on the front bearing portion 74a formed on the upper part of the second support member 74 and connected by connecting bolts, and is supported on the threshing device 15 via the second support member 74. The second mounting portion 71e is configured to be directly connected to the right side wall 30 of the threshing device 15 by connecting bolts. The front cover 71 is supported on the threshing device 15.

[0098] The middle cover 72 and the rear cover 73 are as follows Figure 5 , 12 As shown in Figure 13, the device includes an upper cover 75 that covers the rearward extension 51 in the exhaust pipe 46 from above, a left horizontal cover 76 connected to the end of the upper cover 75 on the threshing device side and covering the side of the rearward extension 51 in the exhaust pipe 46 on the threshing device side, and a right horizontal cover 77 connected to the end of the upper cover 75 on the side opposite to the threshing device side and covering the side of the grain bin side of the rearward extension 51 in the exhaust pipe 46.

[0099] The left horizontal cover portion 76 in the middle cover 72 and the left horizontal cover portion 76 in the rear cover 73 are as follows Figure 7 , 9 As shown, it is configured to tilt downwards toward the threshing device.

[0100] The front-to-back length of the right horizontal cover portion 77 in the middle cover 72 is shorter than the front-to-back length of the upper cover portion 75 in the middle cover 72. The right horizontal cover portion 77 in the middle cover 72 extends downward from the front part of the upper cover portion 75. The middle cover 72 is as follows: Figure 5 , 9 As shown in Figure 10, the second spray section 55 is covered from above by the upper cover 75, and the second spray section 55 is covered from both horizontal sides by the left horizontal cover 76 and the right horizontal cover 77. The middle cover 72 is configured to be located at a position lower than the upper end T2 of the top plate section 15B.

[0101] The front-to-back length of the right horizontal cover portion 77 in the rear cover 73 is shorter than the front-to-back length of the upper cover portion 75 in the rear cover 73. The right horizontal cover portion 77 in the rear cover 73 extends downward from the rear of the upper cover portion 75. The rear cover 73 is as follows: Figure 5 , 9 As shown in Figure 10, the exhaust pipe 46 is configured such that the upper cover 75 covers the rear end 57 of the exhaust pipe 46 from above, and the left and right horizontal covers 76 and 77 cover the rear end 57 of the exhaust pipe 46 from both horizontal sides. Specifically, as shown in Figure 10... Figure 5 As shown, the rear end portion 75a of the upper cover portion 75 in the rear cover 73 is curved upward along the rear end portion 57 of the exhaust pipe 46. The rear cover 73 is configured such that the portion in front of the portion covering the rear end portion 57 of the exhaust pipe 46 is located at a position lower than the upper end T2 of the top plate portion 15B.

[0102] The upper cover portion 75, left horizontal cover portion 76, and right horizontal cover portion 77 of the middle cover 72 and the rear cover 73 are respectively configured to be supported on the threshing device 15. Each of the upper cover portion 75, left horizontal cover portion 76, and right horizontal cover portion 77 of the middle cover 72, together with the second retainer 62 and the third retainer 63 supporting the portion of the exhaust pipe 46 covered by the middle cover 72, are respectively supported on the threshing device 15. Each of the upper cover portion 75, left horizontal cover portion 76, and right horizontal cover portion 77 of the rear cover 73, together with the third retainer 63 supporting the portion of the exhaust pipe 46 covered by the rear cover 73, are respectively supported on the threshing device 15.

[0103] Specifically, such as Figure 12 , 13 As shown, the middle cover 72 includes a first mounting portion 78 formed at the front of the upper cover portion 75, a second mounting portion 79 formed at the rear of the upper cover portion 75, a third mounting portion 80 formed between the first mounting portion 78 and the second mounting portion 79, a fourth mounting portion 81 formed at the lower front of the left horizontal cover portion 76, a fifth mounting portion 82 formed at the lower rear of the left horizontal cover portion 76, and a sixth mounting portion 83 formed between the fourth mounting portion 81 and the fifth mounting portion 82.

[0104] like Figure 12 , 13As shown, the rear cover 73 includes a first mounting portion 85 formed at the front of the upper cover portion 75, a second mounting portion 86 formed at the rear of the upper cover portion 75, a third mounting portion 87 formed at the lower front of the left horizontal cover portion 76, a fourth mounting portion 88 formed at the rear of the third mounting portion 87 on the left horizontal cover portion 76, and a fifth mounting portion 89 formed at the lower part of the left horizontal cover portion 76 at the rear of the fourth mounting portion 88.

[0105] like Figure 12 , 13 As shown, a third support member 90 is erected at two locations, front and rear, on the upper part 30a of the right side wall 30 of the threshing device 15, further rear than the second support member 74. The front third support member 90 is located laterally to the front first support member 64 of the two front and rear locations. The rear third support member 90 is located laterally to the rear first support member 64 of the two front and rear locations.

[0106] like Figure 5 , 8 As shown in 9, 10, and 11, in the middle cover 72, the first mounting part 78 is configured to be placed on the rear bearing part 74b formed on the upper part of the second support member 74 and connected by connecting bolts; the second mounting part 79 is configured to be superimposed on the first mounting part 85 in the rear cover 73 and connected by connecting bolts; the third mounting part 80 is configured to be superimposed on the upper part of the front third support member 90 among the front and rear third support members 90 and connected by connecting bolts; the fourth mounting part 81 is configured to be placed on the upper part 30a of the right side wall 30 on the side forward of the front first support member 64 and connected by connecting bolts; the fifth mounting part 82 is configured to be connected between the front and rear first support members 64 and to the upper part 30a of the right side wall 30 by connecting bolts; and the sixth mounting part 83 is configured to be connected by connecting bolts to the side part 64b of the front first support member 64 on the threshing device side of the front first support member 64.

[0107] like Figure 5 , 8As shown in 9, 10, and 11, in the rear cover 73, the second mounting part 86 is configured to overlap the upper part of the rear third support member 90 of the front and rear third support members 90 and be connected by a connecting bolt; the third mounting part 87 is configured to overlap the upper part 30a of the right side wall 30 between the front and rear first support members 64 and be connected by a connecting bolt; the fourth mounting part 88 is configured to be connected by a connecting bolt to the side part 64b of the rear first support member 64 on the threshing device side of the front and rear first support members 64; and the fifth mounting part 89 is configured to be connected by a connecting bolt to the upper part 30a of the right side wall 30 on the rear side of the rear first support member 64.

[0108] [Another implementation method]

[0109] (1) In the above embodiment, an example of exhaust pipe 46 consisting of three split exhaust pipes 47, 48, and 49 is shown, but it is not limited to this. For example, it may also consist of one unsplit exhaust pipe, two or more split exhaust pipes.

[0110] (2) In the above embodiment, the following example is shown: the cover corresponding to the rearward extension 51 is configured to be able to be divided into a middle cover 72 and a rear cover 73, the upper cover corresponding to the rearward extension 51 is configured in a state where it is divided into an upper cover portion 75 of the middle cover 72 and an upper cover portion 75 of the rear cover 73, and the horizontal cover corresponding to the rearward extension 51 is configured in a state where it is divided into a left horizontal cover portion 76 of the middle cover 72 and a left horizontal cover portion 76 of the rear cover 73. However, it is not limited to this. The middle cover 72 and the rear cover 73 may be configured as an integral cover, and the upper cover and the horizontal cover may be configured as an integral upper cover and horizontal cover that are not divided front and back.

[0111] (3) In the above embodiment, an example is shown in which the erected part 50 overlaps with the secondary return device 42 when viewed along the front-rear direction of the body. However, it is not limited to this and the overlap may not be necessary.

[0112] (4) In the above embodiments, an example with a second spray section 55 is shown, but the second spray section 55 may not be provided.

[0113] (5) In the above embodiment, an example is shown in which an exhaust port 58 is provided at the upwardly curved rear end 57 of the exhaust pipe 46, but it is not limited thereto. For example, it may be configured such that the rear end 57 of the exhaust pipe 46 is in a horizontal position and the exhaust port opens rearward at the rear end in the horizontal position.

[0114] (6) In the above embodiments, an example with a bulge 52 is shown, but the bulge 52 may not be present.

[0115] Industrial availability

[0116] This invention can be applied to combine harvesters that have a cutting section located at the front of the traveling body, a threshing device and a grain bin arranged in a transverse manner, and an engine.

Claims

1. A combine harvester, characterized in that, have: The harvesting section, located at the front of the moving machine, is used to harvest crops in the field; A threshing device for threshing crops cut by the cutting section, and having a threshing body and a top plate covering the threshing body from above; A grain bin, arranged laterally to the threshing device, stores the grains obtained by the threshing device. engine; as well as The exhaust pipe discharges the exhaust gas from the engine. The exhaust pipe includes: an upright portion that rises at a position higher than the threshing body at its front end; and a rearward extending portion that extends rearward from the upright portion through the space between the threshing device and the grain bin at a height corresponding to the upper end of the threshing body and the upper end of the top plate portion. The side wall of the grain bin on the threshing device side is provided with a bulge that bulges outward toward the threshing device. The rearward extension passes above the bulge.

2. The combine harvester according to claim 1, characterized in that, The threshing device includes: a threshing section; a sorting section for separating the threshed material obtained by the threshing section into grains and dust; and a secondary return device disposed in the space between the threshing device and the grain bin for returning the secondary processed material obtained by the sorting section to the sorting section. The erected part is erected on the front side of the secondary return device and overlaps with the secondary return device when viewed along the front-back direction of the machine body.

3. The combine harvester according to claim 1 or 2, characterized in that, A curved portion is provided at the upper end of the upright portion, which bends backward and is connected to the backward extension portion.

4. The combine harvester according to claim 3, characterized in that, The rearward extension is provided with a rearward and upward inclined portion and a horizontal portion. The rearward and upward inclined portion extends in a rearward and upward inclined posture from the curved portion, and the horizontal portion extends rearward in a horizontal posture from the rearward and upward inclined portion.

5. The combine harvester according to claim 4, characterized in that, An injection section is formed in the rearward and upward inclined portion to guide external air from the exhaust pipe into the interior of the exhaust pipe.

6. The combine harvester according to claim 1 or 2, characterized in that, The rear end of the exhaust pipe is bent upwards, and an exhaust port is provided at the rear end at a position higher than the top plate.

7. The combine harvester according to claim 1, characterized in that, The combine harvester has an upper cover that covers the exhaust pipe from above. The upper cover is supported by the threshing device.

8. The combine harvester according to claim 7, characterized in that, The combine harvester has a horizontal cover connected to the end of the upper cover on the threshing device side, covering the side of the exhaust pipe on the threshing device side.

9. The combine harvester according to claim 8, characterized in that, The horizontal cover tilts and descends toward the threshing device.

10. The combine harvester according to any one of claims 7 to 9, characterized in that, The combine harvester includes a retainer that receives and supports the exhaust pipe from below. The upper cover and the retainer are respectively supported by the threshing device.

11. The combine harvester according to claim 10, characterized in that, The combine harvester includes a support component erected from the threshing device. The upper cover is supported by the supporting component. The retainer is supported by the support member.

12. The combine harvester according to any one of claims 7 to 9, characterized in that, An upright section is provided at the front of the exhaust pipe, which is erected to a height corresponding to the upper part of the threshing device. The front cover covering the raised portion is configured independently of the upper cover. An injection section is provided in the exhaust pipe at a position rearward than the portion covered by the front cover, which introduces outside air into the interior of the exhaust pipe.

13. The combine harvester according to claim 12, characterized in that, The spray section is covered from above by the upper cover.

14. The combine harvester according to any one of claims 7 to 9, characterized in that, The threshing device has a threshing body and a top plate that covers the threshing body from above. The upper cover and the exhaust pipe extend forward and backward at a position lower than the upper end of the top plate.

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