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 tail pipe through which exhaust gas combusted by an engine flows. [Background technology]

[0002] Conventionally, a technology has been proposed in which a tailpipe extending linearly rearward, which is 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] JP 2019-208386 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, it has been pointed out that with the technology of Patent Document 1, there is a risk that the heat from the tailpipe heated by 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, a main object of the present invention is to propose a combine harvester that can prevent deterioration of the quality of grains 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) that connects the upper parts of a pair of first vertical frames (20) that stand on the machine body frame (1), the rear wall of the hopper (7) is supported on a second horizontal frame (24) that connects the upper part of a second vertical frame (23) that stands on the machine body 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) that lifts grains, and the rear side of a silencer (36) that reduces the exhaust noise of exhaust gas burned by the engine (E) is supported on a second horizontal frame (24) that connects the upper part of a second vertical frame (23) that stands on the machine body frame (1) to the right wall of the threshing device (4). a tail pipe (37) is connected to the right wall of the threshing device (4) and the left wall of the hopper (7), and in a plan view, the tail pipe (37) extends 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), 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 reach a position rearward of the rear wall of the hopper (7), and the front portion of the intermediate portion (37B) is fixed to a grain lifting tube (26), and the rear portion of the rear portion (37C) is supported on a second horizontal frame (24) in a manner that allows it to be freely attached and detached.

[0007] The invention described in claim 2 is the combine 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).

[0008] The invention described in claim 3 is a combine harvester according to claim 1 or 2, in which 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 the intermediate portion (37B) is positioned between the upper end and the lower end of the funnel portion (11) in side view.

[0009] The invention described in claim 4 is the combine 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 according to claim 5 provides the combine harvester according to claim 4, wherein an inner diameter of the front portion (37A) is larger than an outer diameter of the connecting pipe (36B) of the silencer (36).

[0011] The invention described in claim 6 is a combine harvester described in claim 1 or 2, in which an extended tail pipe (50) is connected to the rear of the rear side portion (37C), and in a plan view, the extended 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).

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

[0013] According to the invention described in claim 1, the front wall of the hopper (7) is supported on a first horizontal frame (21) that connects the upper parts of a pair of left and right first vertical frames (20) that stand on the machine frame (1), the rear wall of the hopper (7) is supported on a second horizontal frame (24) that connects the upper part of a second vertical frame (23) that stands 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 lifting tube (26) that lifts grains, a tail pipe (37) is connected to the rear side of a silencer (36) that reduces the exhaust noise of exhaust gas combusted by the engine (E), and the tail pipe (37) is connected to the right wall of the threshing device (4) in a plan view. The tail pipe (37) extends linearly in the front-rear direction at a predetermined interval 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, a middle 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 middle portion (37B) to the rear side of the rear wall of the hopper (7), and the front portion of the middle 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), so that the heat of the middle portion (37B) and the rear portion (37C) can be prevented from being transmitted to the threshing device (4) and the hopper (7). This makes it possible to prevent deterioration in the quality of the grains sorted by the threshing device (4). In addition, it is possible to prevent exhaust gas discharged to the outside from the tail pipe (37) from returning to the vicinity of the operator at the control section (5).

[0014] According to the invention recited in claim 2, in addition to the effects of the invention recited in claim 1, the rear side portion (37C) is formed in a rearwardly upwardly inclined posture that is more gentle than the front side portion (37A), so that it is possible to further prevent exhaust gas from returning to the vicinity of the operator at the control section (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 on the lower side of 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). This makes it possible to prevent grains that have spilled out of the grain bag from adhering to the middle portion (37B) when the grains are discharged from the hopper (7).

[0016] According to the invention recited in claim 4, in addition to the effects of the invention recited in claim 3, the connection portion between the connecting pipe (36B) and the front portion (37A) is disposed forward and below the lower end portion of the funnel portion (11). Therefore, 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 recited in claim 5, in addition to the effects achieved by the invention recited in claim 4, the inner diameter of the front portion (37A) is made larger than the outer diameter of the connecting pipe (36B) of the silencer (36), so that the temperature of the exhaust gas flowing into the front portion (37A) can be reduced.

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

[0019] According to the invention recited in claim 7, in addition to the effects achieved by the invention recited in claim 6, the inner diameter of the curved portion (50A) is made larger than the outer diameter of the rear portion (37C), thereby making it possible to further reduce the temperature of the exhaust gas flowing into the curved portion (50A). [Brief description of the drawings]

[0020] [Figure 1] FIG. [Diagram 2] FIG. [Diagram 3] FIG. 2 is a left side view of a main part of the combine. [Figure 4] FIG. 2 is a right side view of a main part of the combine harvester. [Diagram 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 the tail pipe. [Figure 8] FIG. [Figure 9] FIG. [Figure 10] FIG. 11 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 a main part of the combine harvester of FIG. [Figure 12] FIG. 11 is a perspective view of the tail pipe and the extended tail pipe of FIG. 10. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[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 grain stalks in the field is provided on the front side of the body frame 1, a thresher 4 that threshes and sorts the harvested grain stalks is provided on the rear left side of the pre-harvesting processing device 3, and a control unit 5 on which an operator sits is provided 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 for storing 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 stands the culms in the field and transports them to the rear, a cutting blade device 3B that cuts the base of the culms transported to the lower rear side of the raking device 3A, an auger device 3C that gathers the culms transported to the rear of the raking device 3A to the left side, and a feeder house 3D that transports the gathered culms to the threshing device 4.

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

[0025] A plate-shaped closing member 12 supported so as to be slidable in the left-right direction is provided at the bottom of the funnel portion 11, and a bag support 13 for suspending a grain bag is provided below the funnel portion 11. As a result, when grains are stored in the hopper 7, the closing member 12 is moved to the left to block the leakage outlet of the funnel portion 11 and store the grains, and when the grains stored in the hopper 7 are discharged to the outside, after the grain bag is suspended from 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 Figs. 3 to 6, the front wall of the tank section 10 is fixed, via a stay 22, to a horizontal frame ("first horizontal frame" in the claims) 21 that connects the upper parts of a pair of left and right vertical frames ("first vertical frames" in the claims) 20 that extend upward from the machine frame 1 provided at the rear of the control section 5. The rear wall of the tank section 10 is fixed, via a stay 25, to a horizontal frame ("second horizontal frame" in the claims) 24 that extends in the left-right direction and is provided at the upper part of a vertical frame ("second vertical frame" in the claims) 23 that extends upward from the machine 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 a predetermined position.

[0027] It is preferable that the left portion of the horizontal frame 24 is 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 portion 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 objects in 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 passes 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 and mixed with diesel.

[0030] Exhaust gas burned by 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 part and a connecting pipe 36B extending rearward from the rear part are formed in the silencer 36. This makes it easy to connect the rear part of the exhaust pipe 35 to the front part of the connecting pipe 36A, and to connect the rear part of the connecting pipe 36B to the front part of the tail pipe 37.

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

[0033] In a side view, the connection portion between the rear of connecting pipe 36B and the front of tail pipe 37 is disposed 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 tail pipe 37 is formed of a front portion 37A extending upward to the rear 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 upward to the rear more gently than the front portion 37A from the rear portion of the intermediate portion 37B, 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 gas discharged from the rear portion 37C from returning to the vicinity of the operator of the control unit 5.

[0035] A heat insulating cover 38 is provided on the upper side of the middle part 37B and the rear part 37C to cover the left part, upper part, and right part of the middle part 37B and the rear part 37C. This can prevent straw dust and the like from adhering to the middle part 37B and the rear part 37C. In addition, it can prevent the 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 portion 37B is disposed at a position overlapping with the funnel portion 11, i.e., below the tank portion 10 and above the bag support 13. It is disposed below the upper wall of the threshing device 4. This makes it possible to prevent grains that have spilled out of the grain bag when the grains are discharged from adhering to the middle portion 37B.

[0038] In a plan view, the middle portion 37B and the rear portion 37C are disposed so as to extend linearly in the front-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 disposed so as to extend linearly in the front-rear direction.

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

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

[0041] As shown in Fig. 9, a connecting member 41 provided at the rear of the rear portion 37C is detachably fixed to the left portion of the horizontal frame 24 by a fastening member such as a bolt. This allows the rear portion 37C to be easily removed from the horizontal frame 24. In addition, most of the heat in the rear portion 37C, which has become hot due to exhaust gas, 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 the description thereof will be omitted.

[0043] A front part of an extension tail pipe 50 is connected to a rear part of a rear side part 37C of a tail pipe 37 of a combine harvester of another embodiment. The extension tail pipe 50 is formed of a curved part 50A that extends rearward from the front end and then curves approximately 90 degrees to the left, and an extension part 50B that extends leftward from the left part of the curved part 50A, and the left part of the extension part 50B extends near the left wall of the threshing device 4. This allows a large distance between the operator of the steering part 5 and the exhaust port of the extension part 50B, and prevents the exhaust gas exhausted from the extension part 50B from returning to the vicinity of the operator of the steering part 5.

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

[0045] 12, the extension tail pipe 50 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.

[0046] The extension part 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 upper part of the rear wall of the threshing device 4. The extension part 50B is removably fixed to the support member 51 by a fastening member such as a bolt. 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 tail pipe 50A curved section 50B extension part E-Engine

Claims

1. A combine harvester having 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) on the right side of the threshing device (4), and a hopper (7) for storing sorted grains on the rear side of 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 body frame (1); The rear wall of the hopper (7) is supported on a second horizontal frame (24) that connects the upper part of a second vertical frame (23) that stands 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); 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); When viewed from the side, the tail pipe (37) is formed of a front portion (37A) extending upward toward the rear 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 supported removably 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 of a tank portion (10) formed in a rectangular parallelepiped shape and a funnel portion (11) formed in an inverted pyramid shape provided on the lower side of the tank portion (10), 3. A combine harvester according to claim 1 or 2, wherein the intermediate portion (37B) is disposed between an upper end portion and a lower end portion 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) 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 an inner diameter of the front portion (37A) is larger than an outer diameter of a connecting pipe (36B) of the silencer (36).

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, when viewed in a plan view, the extended 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) to reach the vicinity of the left wall of the threshing device (4).

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

Images