combine

Abstract

To propose a combine capable of preventing deterioration in quality of grains separated by a thresher due to heating.SOLUTION: At the back side of a silencer (36) for reducing an exhaust sound of an exhaust gas burned by an engine (E), a tail pipe (37) is connected, and in a plan view, the tail pipe (37) is linearly extended in the frontward / backward direction by having a predetermined interval from a right wall of a thresher (4) and a left wall of a hopper (7), and in a side view, the tail pipe (37) is formed by a front side part (37A) extending in a rear upward direction from a front end part, an intermediate part (37B) linearly extending backward from a rear part of the front side part (37A), and a rear side part (37C) extending linearly from a rear part of the intermediate part (37B) and reaching a further rear side than a rear wall of the hopper (7). A front part of the intermediate part (37B) is fixed to a grain lifting cylinder (26), and a rear part of the rear side part (37C) is supported so as to be attached to / detached from a second transverse frame (24).SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a combine harvester equipped with a tailpipe through which exhaust gases combusted by an engine flow. [Background technology]

[0002] A technology has been proposed in the past in which a tailpipe extending linearly rearward, positioned in the space formed between the threshing device and the hopper, is supported on the right wall of the threshing device via multiple connecting members arranged at a predetermined interval in the fore-and-aft direction. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2019-208386 Summary of the Invention [Problem to be solved by the invention]

[0004] However, it has been pointed out that the technology of Patent Document 1 has the risk that the heat from the tailpipe heated by the exhaust gas will be transmitted to the threshing device, causing the surface of the grains sorted and processed by the threshing device to burn, thereby degrading the quality of the grains.

[0005] Therefore, the main object of the present invention is to propose a combine harvester that can prevent deterioration in the quality of grains that have been sorted by a threshing device due to heating. [Means for solving the problem]

[0006] The present invention, which has solved the above problems, is as follows. That is, the invention described in claim 1 is a combine harvester in which a threshing device (4) for threshing and sorting is provided on the left side of a machine frame (1) on which an engine (E) is mounted, a control unit (5) is provided on the right side of the threshing device (4), and a hopper (7) for storing sorted grains is provided behind the control unit (5), The front wall of the hopper (7) is supported on a first horizontal frame (21) connecting the upper parts of a pair of first vertical frames (20) standing on the machine frame (1), the rear wall of the hopper (7) is supported on a second horizontal frame (24) connecting the upper part of a second vertical frame (23) standing on the machine frame (1) to the right wall of the threshing device (4), the left wall of the hopper (7) is connected to the right wall of the threshing device (4) by a grain lifting tube (26) for lifting grains, and the rear side of a silencer (36) for reducing the exhaust noise of exhaust gas burned by the engine (E) is supported on a second horizontal frame (24) connecting the upper part of a second vertical frame (23) standing on the machine frame (1) to the right wall of the threshing device (4). a tail pipe (37) connected to the threshing device (4) and extending linearly in the front-to-rear direction at a predetermined distance from the right wall of the threshing device (4) and the left wall of the hopper (7) in a plan view; and a tail pipe (37) formed in a side view by a front portion (37A) extending rearward and upward from the front end, an intermediate portion (37B) extending linearly rearward from the rear portion of the front portion (37A), and a rear portion (37C) extending linearly from the rear portion of the intermediate portion (37B) to a position rearward of the rear wall of the hopper (7), the front portion of the intermediate portion (37B) being fixed to the grain lifting bin (26), and the rear portion of the rear portion (37C) being detachably supported by the second horizontal frame (24).

[0007] The invention of claim 2 is the combine harvester of claim 1, wherein the rear side portion (37C) is formed in a rearwardly upwardly inclined posture that is more gentle than the front side portion (37A).

[0008] The invention described in claim 3 is a combine harvester described in claim 1 or 2, in which the hopper (7) is formed by a tank portion (10) formed in a rectangular parallelepiped shape and a funnel portion (11) formed in an inverted pyramid shape provided below the tank portion (10), and in side view, the intermediate portion (37B) is positioned between the upper end and the lower end of the funnel portion (11).

[0009] The invention described in claim 4 is Silencer (36) The combine harvester according to claim 3, wherein a connection portion between the connecting pipe (36B) and the front portion (37A) is disposed forward and below a lower end portion of the funnel portion (11).

[0010] The invention described in claim 5 is notes5. The combine harvester according to claim 4, wherein the inner diameter of the front part (37A) is larger than the outer diameter of the connecting pipe (36B).

[0011] The invention described in claim 6 is a combine described in claim 1 or 2, in which an extension tail pipe (50) is connected to the rear of the rear side portion (37C), and in a plan view, the extension tail pipe (50) is formed of a curved portion (50A) that extends from the front end to the rear and then curves to the left, and an extension portion (50B) that extends left from the left part of the curved portion (50A) and reaches the vicinity of the left wall of the threshing device (4).

[0012] The invention of claim 7 is the combine harvester of claim 6, wherein the inner diameter of the curved portion (50A) is larger than the outer diameter of the rear side portion (37C). [Effects of the Invention]

[0013] According to the invention of claim 1, the front wall of the hopper (7) is supported on a first horizontal frame (21) connecting the upper parts of a pair of left and right first vertical frames (20) erected on the machine frame (1), the rear wall of the hopper (7) is supported on a second horizontal frame (24) connecting the upper part of a second vertical frame (23) erected on the machine frame (1) to the right wall of the threshing device (4), the left wall of the hopper (7) is connected to the right wall of the threshing device (4) by a grain lifting tube (26) for lifting grains, a tail pipe (37) is connected to the rear side of a silencer (36) for reducing the exhaust noise of exhaust gas burned by the engine (E), and in a plan view, the tail pipe (37) is connected to the right wall of the threshing device (4). The tail pipe (37) extends linearly in the front-to-rear direction at a predetermined distance from the left wall of the hopper (7), and in a side view, the tail pipe (37) is formed of a front portion (37A) extending rearward from the front end, an intermediate portion (37B) extending linearly rearward from the rear portion of the front portion (37A), and a rear portion (37C) extending linearly from the rear portion of the intermediate portion (37B) to a position rearward of the rear wall of the hopper (7). The front portion of the intermediate portion (37B) is fixed to the grain lifting tube (26), and the rear portion of the rear portion (37C) is detachably supported by the second horizontal frame (24), thereby suppressing the transfer of heat from the intermediate portion (37B) and the rear portion (37C) to the threshing device (4) and the hopper (7). This prevents deterioration in the quality of grain sorted by the threshing device (4). In addition, it is possible to prevent the exhaust gas discharged to the outside from the tailpipe (37) from returning to the vicinity of the operator at the operating section (5).

[0014] According to the invention of claim 2, in addition to the effect of the invention of claim 1, the rear side part (37C) is formed in a rearwardly upwardly inclined posture that is more gentle than the front side part (37A), so that exhaust gas can be further prevented from returning to the vicinity of the operator at the operating part (5).

[0015] According to the invention described in claim 3, in addition to the effects of the invention described in claim 1 or 2, the hopper (7) is formed of a tank portion (10) formed in a rectangular parallelepiped shape and a funnel portion (11) formed in an inverted pyramid shape provided below the tank portion (10), and when viewed from the side, the middle portion (37B) is positioned between the upper and lower ends of the funnel portion (11), so that grains spilling out of the grain bag when discharging grains from the hopper (7) can be prevented from adhering to the middle portion (37B).

[0016] According to the invention of claim 4, in addition to the effect of the invention of claim 3, Silencer (36) Since the connection portion between the connecting pipe (36B) and the front portion (37A) is located forward and below the lower end of the funnel portion (11), the tail pipe (37) can be easily removed from the silencer (36) for maintenance by utilizing the space formed below the funnel portion (11).

[0017] According to the invention of claim 5, in addition to the effect of the invention of claim 4, contact Since the inner diameter of the front portion (37A) is larger than the outer diameter of the connecting pipe (36B), the temperature of the exhaust gas flowing into the front portion (37A) can be lowered.

[0018] According to the invention described in claim 6, in addition to the effects of the invention described in claim 1 or 2, an extension tail pipe (50) is connected to the rear of the rear side portion (37C), and in a plan view, the extension tail pipe (50) is formed of a curved portion (50A) that extends from the front end to the rear and then curves to the left, and an extension portion (50B) that extends left from the left part of the curved portion (50A) and reaches the vicinity of the left wall of the threshing device (4), thereby further preventing exhaust gas discharged to the outside from the extension portion (50B) from returning to the vicinity of the operator of the operating section (5).

[0019] According to the invention of claim 7, in addition to the effect of the invention of claim 6, the inner diameter of the curved portion (50A) is made larger than the outer diameter of the rear side portion (37C), so that the temperature of the exhaust gas flowing into the curved portion (50A) can be further reduced. [Brief explanation of the drawings]

[0020] [Figure 1] FIG. [Figure 2] FIG. [Figure 3] FIG. 2 is a left side view of a main part of the combine harvester. [Figure 4] FIG. 2 is a right side view of a main part of the combine harvester. [Figure 5] FIG. 2 is a plan view of the main parts of the combine harvester. [Figure 6] FIG. [Figure 7] FIG. 2 is a left side view of the exhaust pipe and tailpipe. [Figure 8] FIG. [Figure 9] FIG. [Figure 10] FIG. 10 is a right side view of a main part of a combine harvester according to another embodiment. [Figure 11] FIG. 11 is a plan view of the main part of the combine harvester of FIG. 10. [Figure 12] FIG. 11 is a perspective view of the tail pipe and the extension tail pipe of FIG. 10. DETAILED DESCRIPTION OF THE INVENTION

[0021] As shown in Figures 1 and 2, a general-purpose combine harvester has a traveling device 2 consisting of a pair of left and right crawlers that travels on the soil surface on the underside of a body frame 1, a pre-harvesting processing device 3 that harvests stalks in the field on the front side of the body frame 1, a threshing device 4 that threshers and sorts the harvested stalks on the rear left side of the pre-harvesting processing device 3, and a control unit 5 on which an operator sits on the rear right side of the pre-harvesting processing device 3.

[0022] An engine room 6 that houses the engine is provided below the control unit 5, and a hopper 7 that stores threshed and sorted rapeseed oil and other grains is provided behind the control unit 5.

[0023] The pre-harvesting processing device 3 is composed of a raking device 3A that transports the stalks in the field to the rear while standing them up, a cutting blade device 3B that cuts the base of the stalks transported to the rear lower part of the raking device 3A, an auger device 3C that gathers the stalks transported to the rear of the raking device 3A to the left side, and a feeder house 3D that transports the gathered stalks to the threshing device 4.

[0024] The hopper 7 is composed of a tank section 10 formed in a rectangular parallelepiped shape and a funnel section 11 formed in an inverted pyramid shape provided at the bottom of the tank section 10. Two funnel sections 11 are provided side by side in the front-to-rear direction at the bottom of the tank section 10.

[0025] A plate-shaped closing member 12 supported so as to be slidable in the left-right direction is provided below the funnel portion 11, and a bag support 13 from which a grain bag is hung is provided below the funnel portion 11. As a result, when grains are to be stored in the hopper 7, the closing member 12 is moved to the left to close the leakage outlet of the funnel portion 11 and store the grains, and when the grains stored in the hopper 7 are to be discharged to the outside, after the grain bag is hung on the bag support 13, the closing member 12 is moved to the right to open the leakage outlet and discharge the grains into the grain bag.

[0026] As shown in Figures 3 to 6, the front wall of the tank section 10 is fixed, via a stay 22, to a horizontal frame (the "first horizontal frame" in the claims) 21 that connects the upper parts of a pair of left and right vertical frames (the "first vertical frames" in the claims) 20 that extend upward from the machine body frame 1 provided at the rear of the control unit 5. The rear wall of the tank section 10 is fixed, via a stay 25, to a horizontal frame (the "second horizontal frame" in the claims) 24 that extends in the left-right direction and is provided at the top of a vertical frame (the "second vertical frame" in the claims) 23 that extends upward from the machine body frame 1. Furthermore, the left wall of the tank section 10 is supported by a grain lifting tube 26 that lifts grains threshed and sorted by the threshing device 4 into the tank section 10 of the hopper 7. This allows the tank section 10 to be firmly fixed in place.

[0027] The left part of the horizontal frame 24 is preferably fixed to the right wall of the threshing device 4. This makes it possible to suppress deformation of the horizontal frame 24 and more firmly fix the tank part 10 in a predetermined position.

[0028] A stay 27 is provided at the top of the grain lifting can 26 to support a precleaner 30 that removes floating particles from the air drawn into the engine E, and a stay 28 is provided in the middle of the grain lifting can 26 in the vertical direction to support a tail pipe 37, which will be described later.

[0029] The air that has passed through the precleaner 30 has impurities removed by a cleaner 31 provided at the rear of the steering section 5, and is then drawn into the engine E where it is mixed with diesel fuel.

[0030] The exhaust gas burned by the engine E passes through an exhaust pipe 35, a silencer 36 connected to the rear of the exhaust pipe 35 to reduce exhaust noise, and a tail pipe 37 connected to the rear of the silencer 36, and is exhausted to the outside from the rear of the tail pipe 37.

[0031] A connecting pipe 36A extending forward from the front portion and a connecting pipe 36B extending rearward from the rear portion are formed on the silencer 36. This makes it easy to connect the rear portion of the exhaust pipe 35 to the front portion of the connecting pipe 36A, and to connect the rear portion of the connecting pipe 36B to the front portion of the tailpipe 37.

[0032] The outer diameter of the rear portion of exhaust pipe 35 is smaller than the inner diameter of the front portion of connecting pipe 36A. This allows the ejector effect to lower the temperature of exhaust gas discharged from exhaust pipe 35 through connecting pipe 36A to silencer 36. Furthermore, the outer diameter of the rear portion of connecting pipe 36B is smaller than the inner diameter of the front portion of tail pipe 37. This allows the ejector effect to lower the temperature of exhaust gas discharged from silencer 36 through connecting pipe 36B to tail pipe 37.

[0033] In a side view, the connection between the rear of connecting pipe 36B and the front of tail pipe 37 is located in front of funnel portion 11 at the front of hopper 7. This allows the tail pipe 37 to be easily removed from connecting pipe 36B for maintenance by utilizing the space formed below funnel portion 11.

[0034] In a side view, the tailpipe 37 is formed of a front portion 37A extending rearward and upward from the front end, an intermediate portion 37B extending rearward in a straight line from the rear portion of the front portion 37A, and a rear portion 37C extending rearward and upward more gently from the rear of the intermediate portion 37B than the front portion 37A, and the rear portion of the rear portion 37C extends rearward beyond the rear wall of the hopper 7. This makes it possible to prevent exhaust gases discharged from the rear portion 37C from returning to the area around the operator of the control unit 5.

[0035] A heat-shielding cover 38 is provided on the upper sides of the middle section 37B and the rear section 37C to cover the left, upper, and right sections of the middle section 37B and the rear section 37C. This prevents straw dust and other debris from adhering to the middle section 37B and the rear section 37C. It also prevents grain bags loaded on the upper wall of the threshing device 4 from burning.

[0036] In a side view, the middle portion 37B is disposed below the upper wall of the threshing device 4. This makes it possible to further prevent the grain bags loaded on the upper wall of the threshing device 4 from burning.

[0037] In a side view, the middle section 37B is positioned so as to overlap the funnel section 11, i.e., below the tank section 10 and above the bag support 13. It is also positioned below the upper wall of the threshing device 4. This prevents grains spilling out of the grain bag when the grains are discharged from adhering to the middle section 37B.

[0038] In a plan view, the middle portion 37B and the rear portion 37C are arranged to extend linearly in the front-to-rear direction at a position offset toward the threshing device 4 in the space formed between the threshing device 4 and the hopper 7. Similarly, the front portion 37A is also arranged to extend linearly in the front-to-rear direction.

[0039] 7, a connecting member 40 provided in the front part of the intermediate portion 37B is detachably fixed to the lower part of the stay 28 by a fastening member such as a bolt, thereby allowing the intermediate portion 37B to be easily removed from the stay 28.

[0040] As shown in Figure 8, stay 28 has a rib 28A extending in the front-to-rear direction on its left side, and a rib 28B extending in the left-to-right direction that connects lifting tube 26 to the middle part of rib 28A. This prevents deformation of stay 28 and firmly fixes the front part of middle part 37B. Furthermore, most of the heat in middle part 37B, which has become very hot due to exhaust gases, is released into the atmosphere from lifting tube 26, so there is no thermal impact on threshing device 4 or hopper 7. Furthermore, because the grains pass through lifting tube 26 in an extremely short time, there is no thermal impact on the grains.

[0041] As shown in Figure 9, a connecting member 41 provided at the rear of the rear side portion 37C is detachably fixed to the left side of the horizontal frame 24 with a fastening member such as a bolt. This allows the rear side portion 37C to be easily removed from the horizontal frame 24. Furthermore, most of the heat in the rear side portion 37C, which has become very hot due to exhaust gases, is released into the atmosphere from the horizontal frame 24, so there is no effect of the heat on the threshing device 4 or the hopper 7.

[0042] <Combine Harvester of Other Embodiments> 10 and 11 show a combine harvester according to another embodiment. The same members as those in the combine harvester described above are designated by the same reference numerals and will not be described again.

[0043] In another embodiment of the combine harvester, the front portion of an extended tail pipe 50 is connected to the rear of the rear side portion 37C of the tail pipe 37. The extended tail pipe 50 is formed of a curved portion 50A that extends rearward from the front end and then curves approximately 90 degrees to the left, and an extended portion 50B that extends leftward from the left portion of the curved portion 50A, with the left portion of the extended portion 50B extending near the left wall of the threshing device 4. This allows a large distance between the operator of the steering unit 5 and the exhaust port of the extended portion 50B, preventing exhaust gases discharged from the extended portion 50B from returning to the area around the operator of the steering unit 5.

[0044] The outer diameter of the rear portion of the rear side portion 37C of the tail pipe 37 is smaller than the inner diameter of the front portion of the curved portion 50A of the extended tail pipe 50. This allows the ejector effect to lower the temperature of the exhaust gas discharged from the rear side portion 37C to the curved portion 50A.

[0045] As shown in Figure 12, the extension tail pipe 50 is positioned below the upper wall of the threshing device 4. This makes it possible to further prevent the grain bags loaded on the upper wall of the threshing device 4 from burning.

[0046] The extension portion 50B is supported by a support member 51 that is provided at a predetermined distance in the left-right direction and extends rearward from the top of the rear wall of the threshing device 4. The extension portion 50B is removably fixed to the support member 51 by fastening members such as bolts. This allows the extension tail pipe 50 to be easily removed from the rear wall of the threshing device 4. [Explanation of symbols]

[0047] 1 Aircraft frame 4. Threshing equipment 5 Control Unit 7 Hopper 10 Tank section 11 Funnel part 20 Vertical frame (first vertical frame) 21 Horizontal frame (first horizontal frame) 23 Vertical frame (second vertical frame) 24 Horizontal frame (second horizontal frame) 26 Fried grain tube 36 silencer 36B Connecting pipe 37 Tailpipe 37A Front side 37B Middle part 37C rear side 50 Extended tailpipe 50A curved section 50B extension part E-Engine

Claims

1. A combine harvester is provided with a threshing device (4) for threshing and sorting grains on the left side of a machine frame (1) on which an engine (E) is mounted, a control section (5) is provided on the right side of the threshing device (4), and a hopper (7) for storing sorted grains is provided behind the control section (5). The front wall of the hopper (7) is supported on a first horizontal frame (21) connecting the upper portions of a pair of left and right first vertical frames (20) erected on the machine frame (1), The rear wall of the hopper (7) is supported on a second horizontal frame (24) connecting the upper part of a second vertical frame (23) erected on the machine frame (1) to the right wall of the threshing device (4), The left wall of the hopper (7) is connected to the right wall of the threshing device (4) by a grain lifting tube (26) for lifting grains. a tail pipe (37) connected to the rear side of a silencer (36) for reducing the exhaust noise of the exhaust gas burned by the engine (E); In a plan view, the tail pipe (37) extends linearly in the front-rear direction at a predetermined interval from the right wall of the threshing device (4) and the left wall of the hopper (7), In a side view, the tail pipe (37) is formed of a front portion (37A) extending rearward and upward from a front end portion, an intermediate portion (37B) extending linearly rearward from a rear portion of the front portion (37A), and a rear portion (37C) extending linearly from a rear portion of the intermediate portion (37B) to a position rearward of a rear wall of the hopper (7), A combine harvester characterized in that the front part of the middle part (37B) is fixed to a grain lifting bin (26), and the rear part of the rear side part (37C) is detachably supported on a second horizontal frame (24).

2. 2. The combine harvester according to claim 1, wherein the rear side portion (37C) is formed in a rearwardly upwardly inclined posture that is more gentle than the front side portion (37A).

3. The hopper (7) is formed by a tank portion (10) formed in a rectangular parallelepiped shape and a funnel portion (11) formed in an inverted pyramid shape provided below the tank portion (10), 3. A combine harvester according to claim 1 or 2, wherein the intermediate portion (37B) is disposed between the upper end and the lower end of the funnel portion (11) in a side view.

4. 4. A combine harvester according to claim 3, wherein a connection portion between the connecting pipe (36B) of the silencer (36) and the front portion (37A) is disposed forward and below a lower end portion of the funnel portion (11).

5. 5. A combine harvester according to claim 4, wherein the inner diameter of the front portion (37A) is larger than the outer diameter of the connecting pipe (36B).

6. An extension tail pipe (50) is connected to the rear of the rear side portion (37C), A combine harvester as described in claim 1 or 2, wherein, in a plan view, the extension tail pipe (50) is formed of a curved portion (50A) that extends from the front end to the rear and then curves to the left, and an extension portion (50B) that extends leftward from the left part of the curved portion (50A) and reaches the vicinity of the left wall of the threshing device (4).

7. 7. A combine harvester according to claim 6, wherein the inner diameter of the curved portion (50A) is larger than the outer diameter of the rear side portion (37C).

Images