JP7780718B2 - combine - Google Patents

Description

The present invention relates to a combine equipped with a tailpipe through which exhaust gases burned by the engine flow.

A conventional technology has been proposed in which a tailpipe extending linearly rearward, located in the space between the threshing device and the hopper, is supported on the right wall of the threshing device via multiple connecting members spaced at predetermined intervals in the front-to-rear direction.

Japanese Patent Application Laid-Open No. 2019-208386

However, it has been pointed out that the technology in Patent Document 1 has the risk of heat from the tailpipe heated by exhaust gas being transmitted to the threshing device, causing deterioration in quality, such as burning the surface of the grains sorted by the threshing device.

The main objective of this invention is to propose a combine harvester that can prevent deterioration in the quality of grains sorted by a threshing device due to heating.

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 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).

The invention described in claim 2 is a combine harvester described in claim 1, in which the rear side portion (37C) is formed in a rearwardly upwardly inclined position that is more gentle than the front side portion (37A).

The invention described in claim 3 is a combine harvester described in claim 1 or 2, in which the hopper (7) is formed from 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 and lower ends of the funnel portion (11) in a side view.

The invention described in claim 4 is a combine described in claim 3, in which the connection portion between the connecting pipe (36B) of the silencer (36) and the front portion (37A) is positioned forward and below the lower end of the funnel portion (11).

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

The invention described in claim 6 is a combine harvester 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 plan view, the extension tail pipe (50) is formed of a curved portion (50A) that extends rearward from the front end and then curves to the left, and an extension portion (50B) that extends leftward from the left side of the curved portion (50A) and reaches the vicinity of the left wall of the threshing device (4).

The invention described in claim 7 is the combine described in claim 6, in which the inner diameter of the curved portion (50A) is larger than the outer diameter of the rear side portion (37C).

According to the invention described in 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 parts 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 grain, and a tailpipe (37) is connected to the rear side of a silencer (36) that reduces the exhaust noise of exhaust gases combusted by the engine (E), and in a plan view, the tailpipe (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 preventing heat from the intermediate portion (37B) and rear portion (37C) from being transmitted 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, exhaust gases discharged to the outside from the tailpipe (37) can be prevented from returning to the area around the operator in the control section (5).

According to the invention described in claim 2, in addition to the effects of the invention described in claim 1, the rear side section (37C) is formed with a more gradual upward tilt than the front side section (37A), which further prevents exhaust gas from returning to the area around the operator in the control section (5).

According to the invention of claim 3, in addition to the effects of the invention of claim 1 or 2, the hopper (7) is formed from 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 middle portion (37B) is positioned between the upper and lower ends of the funnel portion (11) in a side view, so that grains spilling out of the grain bag when the grains are discharged from the hopper (7) can be prevented from adhering to the middle portion (37B).

According to the invention of claim 4, in addition to the effect of the invention of claim 3, the connection portion between the connecting pipe (36B) of the silencer (36) and the front portion (37A) is located forward and below the lower end 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).

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

According to the invention of claim 6, in addition to the effects of the invention of claim 1 or 2, an extension tail pipe (50) is connected to the rear of the rear side section (37C). In plan view, the extension tail pipe (50) is formed with a curved section (50A) that extends rearward from the front end and then curves to the left, and an extension section (50B) that extends leftward from the left side of the curved section (50A) and reaches the vicinity of the left wall of the threshing device (4). This further prevents exhaust gases discharged to the outside from the extension section (50B) from returning to the area around the operator of the operating section (5).

According to the invention described in claim 7, in addition to the effect of the invention described in claim 6, the inner diameter of the curved portion (50A) is made larger than the outer diameter of the rear portion (37C), thereby further reducing the temperature of the exhaust gas flowing into the curved portion (50A).

FIG. FIG. FIG. 2 is a left side view of a main part of the combine harvester. FIG. 2 is a right side view of a main part of the combine harvester. FIG. 2 is a plan view of the main parts of the combine harvester. FIG. FIG. 2 is a left side view of the exhaust pipe and tailpipe. FIG. FIG. FIG. 10 is a right side view of a main part of a combine harvester according to another embodiment. FIG. 11 is a plan view of the main part of the combine of FIG. 10 . FIG. 11 is a perspective view of the tail pipe and the extension tail pipe of FIG. 10 .

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, mounted on the underside of the body frame 1; a pre-harvesting device 3 that harvests stalks from the field, mounted on the front of the body frame 1; a threshing device 4 that threshes and sorts the harvested stalks, mounted on the rear left side of the pre-harvesting device 3; and a control unit 5 on which the operator sits, mounted on the rear right side of the pre-harvesting device 3.

An engine room 6 housing the engine is located below the control unit 5, and a hopper 7 for storing threshed and sorted rapeseed oil and other grains is located behind the control unit 5.

The pre-harvesting processing device 3 is composed of a raking device 3A that transports the stalks in the field rearward while raising them upright; 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.

The hopper 7 is composed of a rectangular parallelepiped tank section 10 and an inverted pyramidal funnel section 11 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.

A plate-shaped closing member 12 that is supported so as to be able to slide left and right is provided at the bottom of the funnel portion 11, and a bag support 13 from which a grain bag is suspended is provided below the funnel portion 11. As a result, when storing grain 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 grain, and when discharging the grain stored in the hopper 7 to the outside, after hanging the grain bag on the bag support 13, the closing member 12 is moved to the right to open the leakage outlet and discharge the grain into the grain bag.

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 body frame 1 located 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 left and right and is located at the top of a vertical frame (the "second vertical frame" in the claims) 23 that extends upward from the 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.

The left portion of the horizontal frame 24 is preferably fixed to the right wall of the threshing device 4. This prevents deformation of the horizontal frame 24 and more firmly fixes the tank section 10 in the specified position.

A stay 27 is provided at the top of the grain lifting duct 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 vertical middle of the grain lifting duct 26 to support a tailpipe 37, which will be described later.

Air that passes through the precleaner 30 has impurities removed by a cleaner 31 located at the rear of the steering section 5, and is then drawn into the engine E and mixed with diesel.

Exhaust gases burned by engine E pass 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, before being exhausted to the outside from the rear of the tail pipe 37.

The silencer 36 is formed with a connecting pipe 36A extending forward from the front and a connecting pipe 36B extending rearward from the rear. This makes it easy to connect the rear of the exhaust pipe 35 to the front of the connecting pipe 36A, and the rear of the connecting pipe 36B to the front of the tailpipe 37.

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. Furthermore, the outer diameter of the rear portion of the connecting pipe 36B is smaller than the inner diameter of the front portion of the tailpipe 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 tailpipe 37.

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

In a side view, the tailpipe 37 is formed from a front section 37A extending upward toward the rear from the front end, an intermediate section 37B extending linearly rearward from the rear of the front section 37A, and a rear section 37C extending upward toward the rear more gently from the rear of the intermediate section 37B than the front section 37A, with the rear section of the rear section 37C extending rearward beyond the rear wall of the hopper 7. This prevents exhaust gases discharged from the rear section 37C from returning to the area around the operator at the control section 5.

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

When viewed from the side, the middle section 37B is positioned below the upper wall of the threshing device 4. This further reduces the risk of grain bags loaded on the upper wall of the threshing device 4 burning.

In a side view, the middle section 37B is positioned so that it overlaps with 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 that spill out of the grain bag when the grains are discharged from adhering to the middle section 37B.

In a plan view, the middle portion 37B and rear portion 37C are arranged in a linear fashion 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 in a linear fashion in the front-to-rear direction.

As shown in Figure 7, the connecting member 40 provided at the front of the intermediate portion 37B is detachably fixed to the lower portion of the stay 28 with a fastening member such as a bolt. This allows the intermediate portion 37B to be easily removed from the stay 28.

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

As shown in Figure 9, the connecting member 41 attached to the rear of the rear portion 37C is detachably fixed to the left portion of the horizontal frame 24 with a fastening member such as a bolt. This allows the rear portion 37C to be easily removed from the horizontal frame 24. Furthermore, most of the heat from the rear 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 thermal impact on the threshing device 4 or hopper 7.

<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.

In another embodiment of the combine harvester, the front portion of an extended tail pipe 50 is connected to the rear of the rear portion 37C of the tail pipe 37. The extended tail pipe 50 is formed from a curved portion 50A that extends rearward from the front end and then bends 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 control section 5 and the exhaust port of the extended portion 50B, preventing exhaust gases exhausted from the extended portion 50B from returning to the area around the operator of the control section 5.

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 gases exhausted from the rear side portion 37C to the curved portion 50A.

As shown in Figure 12, the extension tail pipe 50 is positioned below the upper wall of the threshing device 4. This further prevents grain bags loaded on the upper wall of the threshing device 4 from burning.

The extension portion 50B is supported by a support member 51, which is installed 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 with 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.

1 Machine frame 4 Threshing device 5 Control unit 7 Hopper 10 Tank unit 11 Funnel unit 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 Grain lifting bin 36 Silencer 36B Connecting pipe 37 Tail pipe 37A Front side portion 37B Middle portion 37C Rear side portion 50 Extension tail pipe 50A Curved portion 50B Extension portion E Engine

Claims (7)

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). A combine harvester as described in claim 1, wherein the rear side portion (37C) is formed in a rearwardly upwardly inclined position that is more gradual than the front side portion (37A). 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. 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. 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). 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). A combine harvester as described in claim 6, wherein the inner diameter of the curved portion (50A) is larger than the outer diameter of the rear side portion (37C).