JP6707578B2 - Combine - Google Patents

Description

The present invention relates to a combine provided with an exhaust pipe that discharges exhaust gas from an engine to the outside of the machine body.

The combine is equipped with an engine below the operating part located at the front of the fuselage, and an exhaust pipe for discharging exhaust gas (combustion exhaust gas) from the engine to the outside is directed rearward between the threshing device and the grain storage part. Has been extended. Further, in the related art, the exhaust pipe has a first exhaust pipe having an inlet to which exhaust gas from the engine is supplied, and a second exhaust pipe having a diameter larger than that of the first exhaust pipe and connected to a rear end of the first exhaust pipe. There is a pipe provided with a connecting portion between the first exhaust pipe and the second exhaust pipe at a front-rear intermediate portion of the exhaust pipe (see, for example, Patent Document 1).

JP, 2005-128415, A

In the above conventional configuration, after the exhaust gas of the engine is exhausted from the outlet of the muffler as the exhaust gas processing unit, the exhaust gas is guided to the connection portion between the first exhaust pipe and the second exhaust pipe through the first exhaust pipe, and is connected to the connection portion. The outside air is introduced from the gap between the first exhaust pipe and the second exhaust pipe by the ejector effect to cool the exhaust gas. However, in the conventional configuration, the connecting portion between the first exhaust pipe and the second exhaust pipe is provided in the front-rear intermediate portion of the exhaust pipe, and the exhaust gas of the engine is provided from the inlet to the outlet of the first exhaust pipe. Is guided as it is in the high temperature state discharged from the engine. Further, in the above-described conventional configuration, a bending path that bends in a substantially L shape in a side view is formed in the middle of the first exhaust pipe, the flow velocity is suppressed, and the flow slowly at high temperature. As a result, the cooling effect due to the ejector effect is insufficient, and the exhaust gas may flow and be discharged at a high temperature.

Therefore, it has been desired to increase the cooling effect by the introduction of the outside air as much as possible, and to discharge the outside while keeping the temperature of the exhaust gas low.

The characteristic configuration of the combine according to the present invention, the operating unit located in the front of the fuselage, the grain storage unit located behind the operating unit, and the grain storage unit is provided in a state of being aligned in the machine lateral width direction. A threshing device, an engine located below the operating unit, and an exhaust pipe through which exhaust gas from the engine flows are provided, and the exhaust pipe discharges exhaust gas from an inlet to which exhaust gas from the engine is supplied. In a state where the outlet for discharging to the outside is at a higher position, it is extended to the rear of the machine body through between the threshing device and the grain storage part, and the exhaust pipe is the first pipe part having the inlet. And a second pipe portion having a larger diameter than the first pipe portion and connected to the rear end of the first pipe portion, and the outer periphery of the rear end portion of the first pipe portion and the second pipe portion. Outside air can be introduced from between the outer circumference of the front end of the pipe portion, the first pipe portion and the second pipe portion are connected at the front side portion of the exhaust pipe, the first pipe portion, the body A storage hopper that is supported by a support frame that is erected from a frame and that stores the grains obtained by the threshing process in the threshing device is provided in the grain storage unit, and the storage hopper serves as the support frame. A hopper support frame for supporting the hopper support frame, the first pipe portion is supported on the hopper support frame, the hopper support frame, the vertical frame body standing from the machine frame, the vertical frame body, A horizontal frame body that connects the threshing device is provided, and a support stay that supports the first pipe portion is provided in a state of being extended downward from the horizontal frame body.

According to this configuration, the exhaust pipe includes the first pipe portion and the second pipe portion, and the first pipe portion and the second pipe portion are connected on the front side of the exhaust pipe. When the exhaust gas from the engine is supplied to the inlet of the first pipe portion and flows through the inside of the first pipe portion, the outside air is introduced by the ejector effect at the connection portion between the first pipe portion and the second pipe portion, and the exhaust gas is discharged. To be cooled.

Since the connecting portion between the first pipe portion and the second pipe portion is located on the front side of the exhaust pipe, the cooling action by introducing the outside air is exhibited at an early stage after being supplied from the engine. On the front side of the exhaust pipe, since the exhaust force from the engine is strong, the effect of introducing the outside air by the ejector effect is high and the cooling efficiency is high. Then, the exhaust gas flows through the second pipe portion in a cooled state and is discharged to the outside from the rear portion of the machine body.

Therefore, it is possible to enhance the cooling effect by the introduction of the outside air as much as possible, and to discharge the exhaust gas to the outside while keeping the temperature of the exhaust gas low.
Further, according to the present invention, the first pipe portion can be stably supported by the support frame portion that is provided upright from the machine body frame and has high rigidity. Furthermore, in the storage hopper type combine, the strong hopper support frame provided for supporting the storage hopper is effectively used, and a compact and simple structure is provided without providing a dedicated frame. Can be supported. Further, the storage hopper needs to be provided at a high position to form a collection space for collecting grains on the lower side, but the collection space can be formed by providing the vertically oriented frame body. The storage hopper is supported by the horizontal frame body that is firmly supported by connecting the vertical frame body and the threshing device. Then, the first lateral pipe portion can be supported with a compact and simple structure by effectively utilizing the strong lateral frame body without providing a dedicated frame.
In the present invention, the operating unit located at the front of the machine body, the grain storage unit located at the rear of the operating unit, the threshing device provided in a state of being aligned in the machine transverse direction with the grain storage unit, and An engine located below the operating unit and an exhaust pipe through which the exhaust gas from the engine flows are provided, and the exhaust pipe discharges the exhaust gas to the outside more than the inlet to which the exhaust gas from the engine is supplied. Is in a higher position, is extended to the rear of the fuselage through between the threshing device and the grain storage section, the exhaust pipe, the first pipe portion having the inlet, and the first A second pipe portion having a diameter larger than that of the pipe portion and connected to a rear end of the first pipe portion; and an outer circumference of a rear end portion of the first pipe portion and a front end portion of the second pipe portion. Outside air can be introduced from between the outer periphery of the exhaust pipe, the first pipe portion and the second pipe portion are connected at the front side portion of the exhaust pipe, the first pipe portion is erected from the body frame A hopper support for supporting the storage hopper as the support frame body, the storage hopper being supported by a support frame body, the grain storage section being provided with a storage hopper for storing the grain obtained by the threshing process in the threshing device. A frame is provided, the first pipe portion is supported by the hopper support frame, and a protective cover located between the first pipe portion and the storage hopper is provided in a state of being supported by the hopper support frame. Is preferable.
According to this configuration, the exhaust pipe includes the first pipe portion and the second pipe portion, and the first pipe portion and the second pipe portion are connected on the front side of the exhaust pipe. When the exhaust gas from the engine is supplied to the inlet of the first pipe portion and flows through the inside of the first pipe portion, the outside air is introduced by the ejector effect at the connection point between the first pipe portion and the second pipe portion, and the exhaust gas is discharged. To be cooled.
Since the connecting portion between the first pipe portion and the second pipe portion is located on the front side of the exhaust pipe, the cooling action by introducing the outside air is exhibited at an early stage after being supplied from the engine. On the front side of the exhaust pipe, the force of the exhaust gas from the engine is strong, so the effect of introducing the outside air by the ejector effect is high, and the cooling efficiency is high. Then, the exhaust gas flows through the second pipe portion in a cooled state and is discharged to the outside from the rear portion of the machine body.
Therefore, it is possible to enhance the cooling effect by the introduction of the outside air as much as possible, and to discharge the exhaust gas with the temperature of the exhaust gas lowered.
Further, the first pipe portion can be stably supported by the support frame portion that is provided upright from the machine body frame and has high rigidity. Further, in the storage hopper type combine, the strong hopper support frame provided for supporting the storage hopper is effectively used, and a compact and simple structure is provided without providing a dedicated frame, and the first pipe portion is provided. Can be supported. Then, the storage hopper needs to manually collect the grains collected in the collection container in the lower collection space. At the time of this work, the worker may approach the space where the first pipe portion exists. Therefore, by providing the protective cover, it is possible to avoid a disadvantage such as an operator contacting the first pipe portion.

In the present invention, a bent portion is formed at an intermediate position in the front and rear of the exhaust pipe, and a rear portion of the exhaust pipe located rearward of the bent portion is located in front of the bent portion of the exhaust pipe. When the connecting portion that is provided in an inclined posture that is gentler than the front side portion that is located on the part side and that connects the first pipe portion and the second pipe portion is located on the front side of the bent portion. It is suitable.

According to this configuration, in the bent portion, the flow velocity of the exhaust gas is suppressed and the exhaust gas flows slowly, so that heat is likely to be trapped, but the exhaust gas is likely to flow vigorously in the front side region that is largely inclined. Since the connecting portion is located in such a front region, the exhaust gas can be efficiently cooled by introducing the outside air before reaching the bent portion. Further, the rear region has a gentle slope, and the exhaust gas flows slowly while being in contact with the exhaust pipe, so that it is easy to cool the exhaust pipe by radiating heat.

In the present invention, an engine bonnet that covers the upper side of the engine, and an exhaust processing unit that is located in the engine bonnet and that processes exhaust gas from the engine are provided, and an exhaust unit of the exhaust processing unit and the first exhaust processing unit are provided. It is preferable that the one pipe portion is connected at a position located below the engine bonnet, and the connecting portion connecting the first pipe portion and the second pipe portion is located behind the engine bonnet. Is.

According to this configuration, for example, even if blowback from the outlet of the exhaust pipe occurs and the exhaust is blown out from the inlet of the first pipe portion, the exhaust is discharged into the engine bonnet, Less likely to adversely affect other devices. Further, since the connecting portion between the first pipe portion and the second pipe portion is located at the rear of the engine bonnet, the influence of the high temperature air inside the engine bonnet is small, and the cooling function by introducing the outside air at the earliest possible stage. Can be demonstrated.

In the present invention, it is preferable that a side panel is provided on a side of the operation unit, and the support frame body is connected to a side panel support unit that supports the side panel.

According to this configuration, the supporting structure that is upright from the body frame and has high rigidity is effectively used to support not only the first pipe portion but also the side panel, so that the supporting structure is compact and simple. It becomes a thing.

In the present invention, it is preferable that the first pipe portion is composed of a straight pipe extending linearly.

According to this configuration, the exhaust gas from the engine can pass through the inside of the first pipe portion vigorously without staying, and the cooling function by the introduction of the outside air can be more easily exerted.

In the present invention, it is preferable that the second pipe portion is supported by the threshing device.

According to this configuration, the second pipe portion is separated from the grain storage portion and is stably supported by the threshing device having high rigidity in a state where the stored grain is not adversely affected.

In the present invention, the second pipe portion has a front-side split pipe to which the first pipe portion is connected, and a rear end of the front-side split pipe having a larger diameter than the front-side split pipe. It is preferable that it is provided with a connected rear side split pipe and that outside air can be introduced from between the outer circumference of the rear end of the front side split pipe and the outer circumference of the front end of the rear side split pipe.

According to this configuration, outside air is introduced by the ejector effect and exhausted not only at the connecting portion between the first pipe portion and the second pipe portion but also at the connecting portion between the front side divided pipe and the rear side divided pipe. It is cooled more reliably.

In the present invention, it is preferable that the front side divided pipe is formed by a bent pipe in which a bent portion is formed at a front and rear midway portion, and the rear side divided pipe is formed by a straight pipe extending linearly. is there.

According to this configuration, the exhaust gas cooled at the connecting portion between the front-side split pipe and the rear-side split pipe is discharged through the linearly-extending rear-side split pipe without heat being accumulated therein. You can

It is the whole side view of a combine. It is a whole top view of a combine. It is a rear view of an exhaust pipe arrangement part. It is a side view of an exhaust pipe arrangement part. It is a top view of an exhaust pipe arrangement part. It is a perspective view of a hopper support frame. It is a perspective view which shows the support structure of an exhaust pipe. It is a side view which shows the support structure of the front part of an exhaust pipe. It is a side view which shows the support structure of the rear part of an exhaust pipe. It is the XX sectional view taken on the line of FIG. It is the XI-XI sectional view taken on the line of FIG. It is the XII-XII sectional view taken on the line of FIG.

Hereinafter, a case where the embodiment of the combine according to the present invention is applied to an ordinary combine as an example of the combine will be described with reference to the drawings.

〔overall structure〕
As shown in FIG. 1 and FIG. 2, the ordinary combine harvester is provided with a driving unit 3 on the front right side of a traveling machine body 2 including a pair of left and right crawler traveling devices 1, and a threshing device for threshing a cropped crop. 4 and a grain storage unit 5 that stores the grains obtained by the threshing process. The grain storage part 5 is provided in a state of being located on the rear side of the operating part 3, the grain storage part 5 is located on the right side of the machine body, and the threshing device 4 is located on the left side of the machine body. The threshing device 4 is provided in a state of being aligned in the lateral direction of the machine body. Further, an engine 6 is provided below the operating unit 3, and the power of the engine 6 is transmitted to each unit of the combine.

In this embodiment, when defining the anteroposterior direction of the machine body, it is defined along the machine body traveling direction in the working state, and when defining the left and right direction of the machine body, the left side and the right side are defined in a state viewed in the machine body traveling direction view. .. That is, the direction indicated by reference numeral (F) in FIGS. 1 and 2 is the front side of the machine body, and the direction indicated by reference numeral (B) in FIGS. 1 and 2 is the rear side of the machine body. The direction indicated by the symbol (L) in FIG. 2 is the left side of the machine body, and the direction indicated by the symbol (R) in FIG. 2 is the right side of the machine body.

A feeder 7 for conveying the harvested culm is swingably connected to the front part of the threshing device 4 about the axis of the horizontal axis, and a cutting portion 8 having a harvested width approximately equivalent to the lateral width of the machine is coupled to the front end of the feeder 7. Has been done. The mowing unit 8 includes a rotary reel 9 for scraping the planted culm backward, a clipper-type reaping device 10 for cutting and cutting the plant base of the planted culm, and the cultivated grain culm to the lateral side in the lateral direction of the machine body. It is provided with a lateral feed auger 11 for feeding and transferring, and the grain culms cut by the reaping device 10 are laterally fed by the lateral feed auger 11 and supplied to the feeder 7.

The driver 3 includes a driver's seat 12, a front panel 14 located in front of the driver's seat 12 and provided with a plurality of operation tools such as a steering operation lever 13, and a driver's seat 12 located on the left side of the driver's seat 12 for shifting gears. A side panel 17 and the like including various operating tools such as the lever 15 and the threshing clutch lever 16 are provided. On the right side of the driver's seat 12, a dust-proof duct 18 for sucking cooling air to the engine 6 by the action of a radiator fan (not shown) is provided. The driving unit 3 is provided with a driving unit canopy 19 having functions of preventing sunlight for a driver sitting on the driving unit 3 and avoiding rainwater.

The upper part of the engine 6 is covered with an engine bonnet 50, and the driver's seat 12 is placed and supported on the upper side of the engine bonnet 50. The space in which the engine 6 is housed is covered by the engine bonnet 50 so that the hot air of the engine 6 is not transmitted to the driving unit 3.

Both sides of the threshing device 4 are covered with side walls 4A, and an upper part thereof is covered with a top plate 4B having a substantially cylindrical shape in a front view. Although not shown, the harvested grain conveyed from the feeder 7 has a handling cylinder and a net (not shown) on the upper side of the internal space surrounded by the left and right side walls 4A and the top plate 4B. A handling room is formed to handle culm. Further, at the lower part of the handling room, there is provided a sorting processing unit that sorts the treated material leaking from the receiving net into grain, second rice such as rice with branches, and waste straw waste.

The grains selected by the selection processing unit are discharged to the outside on the lateral side of the grain storage unit 5 side of the threshing device 4 by a first object recovery screw (not shown). A threshing device 20 including a screw conveyor is provided laterally outside the side wall 4A of the threshing device 4 on the grain storage unit 5 side. The grains discharged laterally outward on the grain storage part 5 side of the threshing device 4 are conveyed upward by the fried device 20 and stored in the grain storage part 5.

As shown in FIGS. 2 to 5, the upper part of the grain lifting device 20 is connected and fixed to the side wall 4A of the threshing device 4 by a pair of front and rear connecting stays 21 which are substantially L-shaped plate bodies in a plan view. One end of each of the pair of connecting stays 21 is welded to the outer peripheral portion of the grain lifting device 20, and the other end is bolted to a bracket 22 fixed to the side wall 4A of the threshing device 4.

The second product obtained in the sorting unit is discharged to the outside laterally on the grain storage unit 5 side of the threshing device 4 by the second product recovery screw (not shown), and the grain storage in the threshing device 4 is performed. It is reduced to the front side portion of the threshing device 4 by the second product reducing device 23 provided on the lateral side of the section 5. The waste straws and the like are discharged outward through the discharge case 4C on the rear side of the machine body of the threshing device 4.

[Grain storage part]
The grain storage unit 5 will be described.
From the storage hopper 25, the grain storage unit 5 has a storage space for storing the grains subjected to threshing processing, and a storage hopper 25 having a discharge port 24 as a discharge unit capable of discharging the grains below the storage space. A collection unit 26 that collects the discharged grains and a hopper support frame 27 that supports the storage hopper 25 are provided.

As shown in FIG. 1, the storage hopper 25 is provided with three downwardly narrowed flow-down guide portions on the lower side, and a discharge port 24 capable of discharging grains downward is formed at the lower end portion, and A manually operated shutter mechanism 29 that can open and close the discharge port 24 is provided.

The collection unit 26 is provided with a bag holding unit 30 that holds the grain storage bag F for storing the grains discharged from the discharge port 24 of the storage hopper 25 in a vertical posture. The bag holding unit 30 is provided with a plurality of left and right supporting rods 30a extending in a cantilever shape so as to be locked to the upper portion of the grain accommodation bag F and hold the vertical posture. At the lower part of the collecting unit 26, a mounting table 31 for receiving and supporting the grain storage bag F in which the grains are stored is provided.

As shown in FIG. 2, on the right side of the mounting table 31, there is provided a work step section 32 on which an auxiliary worker who performs grain collection work can ride. The working step portion 32 is swingably supported by the body frame 33 around the longitudinal swing axis at the end on the inner side (left side) of the body, and has a work posture that projects laterally outward from the body and an inner side of the body. It is configured so that it can be switched to a retracted posture in which it retracts to the side. Further, on the upper side of the storage hopper 25, there is provided an auxiliary canopy 34 which covers the upper side of an auxiliary worker who works in the work area and has the functions of preventing sunlight and preventing rainwater.

As shown in FIGS. 3 and 4, the hopper support frame 27 includes a plurality of vertically-oriented frame members that are erected from the machine body frame 33 at a position corresponding to both front and rear end portions of the storage hopper 25 and are spaced from each other in the left-right direction. 35, a horizontal frame body 36 in the left-right direction connected to the upper end portions of the plurality of vertical frame bodies 35, and a front-back frame body 37 connecting the front-rear horizontal frame bodies 36 to each other.

To add a further explanation, as shown in FIG. 6, two vertically oriented frame bodies 35 are provided on the front side and the rear side at intervals in the left-right direction. The lower ends of all the vertically oriented frame bodies 35 are connected and fixed to the machine body frame 33. Then, in the front and rear both sides, the horizontally oriented horizontal frame bodies 36 are connected over the upper end portions of the plurality of vertically oriented frame bodies 35 arranged in the horizontal direction. The lateral frame body 36 on the front side has the left side of the machine body, that is, the end portion on the threshing device 4 side, extended to the side wall 4A of the threshing device 4, and is bolted to the side wall 4A. Therefore, the horizontal frame body 36 on the front side connects the vertical frame body 35 and the threshing device 4. A rear-side lateral connector 36A extends from the front-rear halfway portion of the front-rear frame member 37 toward the threshing device 4, and the lateral connector 36A is bolted to the side wall 4A of the threshing device 4.

As shown in FIGS. 3 to 6, the storage hopper 25 is supported at its front and rear side end portions by support members 38 on both front and rear sideways frame bodies 36. In this way, the storage hopper 25 is supported by the hopper support frame 27. In the figure, reference numeral 39 is a worker protection member that supports an auxiliary worker who carries out bagging work from the rear side. Reference numeral 40 is a handrail that can be gripped and operated by an auxiliary worker.

〔Exhaust pipe〕
Next, the exhaust pipe 41 through which the exhaust gas from the engine 6 flows will be described.
As shown in FIGS. 4 and 5, the exhaust gas (exhaust gas after combustion) discharged from the engine 6 passes through a muffler 42 located on the upper left side of the engine 6 and then flows through an exhaust pipe 41 to an outlet at the rear of the machine body. Is discharged to the outside from the exhaust port 43. The exhaust pipe 42a, which serves as an exhaust portion of the muffler 42, is provided so as to exhaust the exhaust gas from the rear portion of the muffler 42 in an obliquely upward rearward posture.

In the exhaust pipe 41, the threshing device 4 and the grain are disposed in a state in which the exhaust port 43 as an outlet for discharging the exhaust to the outside is higher than the exhaust inlet 44 as the inlet to which the exhaust from the engine 6 is supplied. It extends through the space between the grain reservoir 5 and the rear part of the fuselage.

The exhaust pipe 41 includes a first pipe portion 41A having an inlet (exhaust gas inlet 44), and a second pipe portion 41B having a larger diameter than the first pipe portion 41A and connected to the rear end of the first pipe portion 41A. With the above, it is possible to introduce outside air from between the outer circumference of the rear end of the first pipe portion 41A and the outer circumference of the front end of the second pipe portion 41B, and the first pipe portion 41A and the second pipe portion 41B are It is connected on the front side of the exhaust pipe 41.

And the 2nd pipe part 41B is a front side division pipe to which the 1st pipe part 41A is connected, and a rear side which is larger in diameter than the front side division pipe and is connected to the rear end of the front side division pipe. A split pipe is provided, and outside air can be introduced between the outer circumference of the rear end of the front split pipe and the outer circumference of the front end of the rear split pipe.

That is, in this embodiment, the exhaust pipe 41 is divided into three parts in the front and rear, and as shown in FIG. 4, the exhaust pipe 41 serves as a first pipe portion 41A having an exhaust inlet 44 as an inlet. First exhaust pipe 45, a second exhaust pipe 46 as a front side split pipe of the second pipe portion 41B connected to the rear end of the first exhaust pipe 45, and a rear end of the second exhaust pipe 46. And a third exhaust pipe 47 as a rear side divided pipe of the second pipe portion 41B connected to the.

As shown in FIG. 4, the exhaust pipe 42a of the muffler 42 and the first exhaust pipe 45 are connected to each other at a position located below the engine hood 50. A connecting portion 48 connecting the first exhaust pipe 45 and the second exhaust pipe 46 is located behind the engine bonnet 50.

In the exhaust pipe 41, a bent portion k is formed in the middle of the front and rear as a whole, and a rear side region located on the rear side of the bent portion k is more than a front side region located on the front side of the bent portion k. Is also installed in a gentle inclination. In the example shown in FIG. 4, the rear side region is in a posture close to a substantially horizontal posture. The connecting portion 48 connecting the first exhaust pipe 45 and the second exhaust pipe 46 is located on the front side of the bent portion k.

The first exhaust pipe 45 is composed of a straight pipe extending linearly. The first exhaust pipe 45 is provided in a rearward rising inclination posture in which the front side is located on the lower side and the rear side is located on the upper side. The exhaust inlet 44 located on the front side of the fuselage in the first exhaust pipe 45 is formed so as to surround the outer peripheral portion of the exhaust pipe 42a of the muffler 42 and to be radially spaced from the exhaust pipe 42a. Has been done. A gap that functions as an outside air intake portion is formed between the exhaust pipe 42 a of the muffler 42 and the inner surface of the exhaust inlet 44. Due to the ejector effect accompanying the flow of exhaust gas, the outside air is sucked through this gap, the exhaust gas and the outside air are mixed, and the temperature of the exhaust gas can be lowered.

The second exhaust pipe 46 is configured by a bent pipe that is bent in a substantially L shape in a side view and has a bent portion k formed in the front and rear. The front side of the bent portion k is provided in a tilted rearward posture in a state of being connected to the first exhaust pipe 45. The rear side of the bent portion k extends rearward of the machine body in a substantially horizontal posture to a position slightly rearward of the front-rear direction intermediate portion of the threshing device 4.

The front end of the third exhaust pipe 47 is connected to the rear end of the second exhaust pipe 46. At the connecting portion 49 between the second exhaust pipe 46 and the third exhaust pipe 47, outside air can be introduced between the outer periphery of the rear end of the second exhaust pipe 46 and the outer periphery of the front end of the third exhaust pipe 47. Has been done. That is, the third exhaust pipe 47 has a larger diameter than the second exhaust pipe 46, and the opening of the front end portion of the third exhaust pipe 47 is formed between the connection portion 49 and the rear end portion of the second exhaust pipe 46. It is formed so as to be radially spaced. Between the outer circumference of the rear end portion of the second exhaust pipe 46 and the outer circumference of the front end portion of the third exhaust pipe 47, a gap that functions as an outside air intake portion is formed over the entire circumference. Due to the ejector effect associated with the flow of the exhaust gas inside the exhaust pipe 41, the outside air is sucked through the gap, and the exhaust gas and the outside air are mixed to further lower the temperature of the exhaust gas.

The rear end portion of the third exhaust pipe 47 is provided with an inclined guide body 51 that guides the exhaust gas discharged rearward from the exhaust port 43 toward the rear obliquely upward. Exhaust gas is discharged toward the open space at the upper rear part of the machine body by this inclined guide body 51, and the exhaust gas is easily diffused.

Next, the support structure of the exhaust pipe 41 will be described.
First, the first exhaust pipe 45 will be described. The first exhaust pipe 45 is supported by a hopper support frame 27 as a support frame body SF that is erected from the machine body frame 33. Specifically, the first exhaust pipe 45 is supported by the horizontal frame body 36 on the front side of the hopper support frame 27. That is, as shown in FIGS. 4, 5, 7, and 8, a connecting support stay 52 is provided in a state of being connected to an end of the sideways frame body 36 on the threshing device 4 side and extending downward. ing. The support stay 52 has a stepped portion formed by bending a plate body into a substantially stepwise shape in a side view, and a vertical surface portion 52a at an upper portion of the stepped portion is bolted to the horizontal frame body 36.

The support stay 52 is provided with a substantially L-shaped downward extending portion 52b integrally fixed to the lower side of the stepped portion in a plan view. A first connecting bracket 53 is integrally connected by welding to an outer peripheral portion of a portion corresponding to the downwardly extending portion 52b of the first exhaust pipe 45. A relay member 54 formed of a plate body having a substantially L-shape in a plan view is bolted to the plate surface of the downward extending portion 52b and the plate surface of the first connecting bracket 53 while the plate surfaces are in contact with each other. ing. In this way, the first exhaust pipe 45 is supported by the hopper support frame 27 via the support stay 52.

As shown in FIGS. 7 and 8, the rear end portion of the side panel 17 is connected to the lower horizontal surface portion 52c of the stepped portion of the support stay 52. Therefore, the horizontal plane portion 52c of the support stay 52 connected to the lateral frame body 36 corresponds to the side panel support portion, and the lateral frame body 36 supports the side panel 17.

Next, the support structure of the second exhaust pipe 46 will be described.
As shown in FIGS. 7 and 8, the second connecting bracket 55 is welded to the outer peripheral portion of the second exhaust pipe 46 at a position corresponding to the connecting stay 21 on the rear side of the machine body that supports the upper portion of the grain lifting device 20. They are connected together. The connecting stay 21 and the second connecting bracket 55 are bolt-connected. The second connecting bracket 55 is formed in a flat plate shape and is connected to the connecting stay 21 with two bolts.

The rear side portion of the second exhaust pipe 46 is supported by the threshing device 4 via the third connecting bracket 56. As shown in FIG. 11, the third connecting bracket 56 has horizontal connecting portions 57, 58 on both upper and lower sides, and the connecting portions 57, 58 on both upper and lower sides are connected by a vertical surface portion 59. It is configured by a Z-shaped, in other words, a substantially stepped plate body. The lower connecting portion 57 is integrally connected to an upper portion of the second exhaust pipe 46 by welding, and the upper connecting portion 58 is bolt-connected to a mounting portion 60 provided in the threshing device 4. Thus, the rear side portion of the second exhaust pipe 46 is supported by the threshing device 4.

The third exhaust pipe 47 extends rearward in a substantially horizontal posture so as to be continuous with the rear portion of the second exhaust pipe 46. As shown in FIG. 9, the third exhaust pipe 47 is supported by the threshing device 4 via a fourth connecting bracket 61 having a similar configuration at each of a position slightly forward of the front-rear intermediate portion and a position at the rear end thereof. Has been done. As shown in FIG. 12, the fourth connecting bracket 61 is configured by an L-shaped plate body in the front-rear direction, and the lower vertical surface portion 62 is located at a side portion of the third exhaust pipe 47 on the threshing device 4 side. The connection parts 63 are integrally connected by welding, and the upper horizontal connection part 63 is bolt-connected to a mounting part 64 provided in the threshing device 4.

Portions of the third exhaust pipe 47 corresponding to the front-rear intermediate portion are supported by the threshing device 4 via the fifth connecting bracket 65. As shown in FIG. 12, the fifth connecting bracket 65 is composed of an L-shaped plate in the front-rear direction, and the upper horizontal connecting portion 66 is welded to a lower portion of the third exhaust pipe 47. They are integrally connected, and the lower vertical surface portion 67 is bolted to the side wall 4A of the threshing device 4. In this way, the lower part of the front-rear intermediate portion of the third exhaust pipe 47 is supported by the threshing device 4.

As shown in FIGS. 2, 8, 9, and 12, above the exhaust pipe 41, for example, when performing maintenance work on the handling chamber of the threshing device 4, a work table 68 on which a worker can mount is provided. ing. The workbench 68 is supported on the upper part of the side wall 4A of the threshing device 4 and is bolted at a plurality of locations. A portion of the rear side of the work table 68 on the grain storage section 5 side is supported by the side wall 4A of the threshing device 4 via a support member 69 connected to the lower side. The third connecting bracket 56 and the workbench 68 are separated so that the heat of the exhaust pipe 41 is not directly transferred to the workbench 68.

As shown in FIGS. 4, 5 and 6, a protective cover 70 is provided between the first exhaust pipe 45 and the storage hopper 25. As shown in FIG. 10, the protective cover 70 is formed in a substantially L shape by bending the upper edge portion of the rectangular plate body. The upper part is bolted to the front-rear frame body 37 of the hopper support frame 27, and the lower part is bolted to the support member 71 extending from the vertical frame body 35.

[Another embodiment]
(1 ) In the above embodiment, the first exhaust pipe 45 and the third exhaust pipe 47 are straight pipes, and the second exhaust pipe 46 is a bent pipe that is bent in a substantially L shape in a side view. However, instead of this configuration, the first exhaust pipe 45, the second exhaust pipe 46, and the third exhaust pipe 47 may be configured by straight pipes, respectively. The three exhaust pipes 47 may be formed of a bent pipe.

( 2 ) In the above-described embodiment, the connection portion 48 that connects the first exhaust pipe 45 and the second exhaust pipe 46 is located behind the engine bonnet 50. The part 48 may be provided at a position higher than the engine hood 50.

( 3 ) In the above embodiment, the protective cover 70 is provided between the first exhaust pipe 45 and the storage hopper 25, but such a protective cover 70 may not be provided.

( 4 ) In the above embodiment, the first exhaust pipe 45 constitutes the first pipe portion 41A, the second exhaust pipe 46 constitutes the front side divided pipe, and the third exhaust pipe 47 constitutes the rear side divided pipe. The second exhaust pipe 46 and the third exhaust pipe 47 constitute the second pipe portion 41B, that is, the exhaust pipe 41 is divided into three and is constituted by three pipe members. Alternatively, instead of this configuration, the first pipe portion 41A and the second pipe portion 41B may be configured by one pipe member, respectively, and the first pipe portion 41A and the second pipe portion 41B are respectively plural. It may be configured by the tube member of. In other words, the exhaust pipe 41 may be composed of two pipe members or may be composed of four or more pipe members.

( 5 ) In the above embodiment, the rear portion of the exhaust pipe 41, which is located on the rear side of the bent portion k, is provided in a posture close to a substantially horizontal posture. The rear portion of the portion 41, which is located on the rear side of the bent portion k, may be provided in a rearwardly inclined posture that is gentler than the front portion of the front portion.

( 6 ) In the above-described embodiment, an example in which exhaust gas from the engine 6 is supplied to the exhaust pipe 41 after passing through the muffler 42 as an exhaust treatment unit, but instead of this configuration, another example of the exhaust treatment unit. As an exhaust gas purifying device that reduces particulate matter contained in the exhaust gas of the engine 6, for example, a diesel particulate filter (DPF) (Deasel Particulate Filter) that captures diesel particulates contained in the exhaust gas. The gas may be supplied to the exhaust pipe 41 after passing through the exhaust gas purifying apparatus including the above).
In addition, after passing through another exhaust gas purifying device that reduces nitrogen oxides (NOx) contained in the exhaust gas by using SCR (Selective Catalytic Reduction) (selective catalytic reduction), the exhaust gas is supplied to the exhaust pipe 41. It may be one. Further, it may be supplied to the exhaust pipe 41 after passing through the exhaust gas purification apparatus using the SCR and the exhaust gas purification apparatus equipped with the DPF, respectively.

( 7 ) In the above embodiment, the one applied to the ordinary combine harvester was illustrated, but the invention can also be applied to the self-removing combine harvester.

INDUSTRIAL APPLICABILITY The present invention can be applied to a combine provided with an exhaust pipe for discharging exhaust gas from an engine to the outside of the machine body.

3 Operation part 4 Threshing device 5 Grain storage part 6 Engine 25 Storage hopper 27 Hopper support frame
33 Airframe frame 35 Vertical frame body 36 Horizontal frame body 41 Exhaust pipe 41A First pipe part 41B Second pipe part 42 Exhaust treatment part 42a Exhaust part 43 Outlet 44 Inlet 46 Front side split pipe 47 Rear side split pipe 50 Engine bonnet 52 support stay 52c side panel support portion
7 0 Protective cover k Bending part SF Support frame

Claims (9)

An operating unit located at the front of the machine body, a grain storage unit located behind the operation unit, a threshing device provided in a state of being aligned in the machine transverse direction with the grain storage unit, and below the operating unit. An engine located and an exhaust pipe through which exhaust gas from the engine flows are provided,
The exhaust pipe passes between the threshing device and the grain storage section in a state in which the outlet for discharging the exhaust to the outside is higher than the inlet to which the exhaust from the engine is supplied, Extended to the rear,
The exhaust pipe includes a first pipe portion having the inlet and a second pipe portion having a diameter larger than that of the first pipe portion and connected to a rear end of the first pipe portion, and It is possible to introduce outside air from between the outer periphery of the rear end portion of the one pipe portion and the outer periphery of the front end portion of the second pipe portion,
The first pipe portion and the second pipe portion are connected at the front side portion of the exhaust pipe,
The first pipe portion is supported by a support frame body erected from the body frame,
The grain storage unit is provided with a storage hopper that stores the grain obtained by the threshing process in the threshing device,
A hopper support frame that supports the storage hopper is provided as the support frame body ,
The first pipe portion is supported by the hopper support frame,
The hopper support frame is provided with a vertically oriented frame body that is erected from the machine body frame, and a horizontally oriented frame body that connects the vertically oriented frame body and the threshing device,
A combine , comprising a support stay that supports the first pipe portion in a state of being extended downward from the lateral frame body. An operating unit located at the front of the machine body, a grain storage unit located behind the operation unit, a threshing device provided in a state of being aligned in the machine transverse direction with the grain storage unit, and below the operating unit. An engine located and an exhaust pipe through which exhaust gas from the engine flows are provided,
The exhaust pipe passes between the threshing device and the grain storage section in a state in which the outlet for discharging the exhaust to the outside is higher than the inlet to which the exhaust from the engine is supplied, Extended to the rear,
The exhaust pipe includes a first pipe portion having the inlet, a second pipe portion having a larger diameter than the first pipe portion and connected to a rear end of the first pipe portion, and the first pipe portion It is possible to introduce outside air from between the outer periphery of the rear end of the pipe portion and the outer periphery of the front end of the second pipe portion,
The first pipe portion and the second pipe portion are connected at the front side portion of the exhaust pipe,
The first pipe portion is supported by a support frame body erected from the body frame ,
The grain storage unit is provided with a storage hopper that stores the grain obtained by the threshing process in the threshing device,
A hopper support frame that supports the front storage hopper is provided as the support frame body,
The first pipe portion is supported by the hopper support frame,
A combine provided with a protective cover located between the first pipe portion and the storage hopper in a state of being supported by the hopper support frame. A bent portion is formed at an intermediate position in the front and rear of the exhaust pipe, and a rear portion of the exhaust pipe located rearward of the bent portion is located forward of the bent portion of the exhaust pipe. It is installed in a sloping posture that is gentler than the front part,
The combine according to claim 1 or 2 , wherein a connecting portion for connecting the first pipe portion and the second pipe portion is located on the front side of the bent portion. An engine hood that covers the upper side of the engine,
An exhaust processing unit located in the engine bonnet and processing exhaust gas from the engine;
The exhaust portion of the exhaust processing portion and the first pipe portion are connected at a position located below the engine bonnet,
The combiner according to any one of claims 1 to 3, wherein a connecting portion for connecting the first pipe portion and the second pipe portion is located behind the engine bonnet. A side panel is provided on the side of the driving unit,
The combine frame according to any one of claims 1 to 4, wherein the support frame body is connected to a side panel support portion that supports the side panel. The combine according to any one of claims 1 to 5 , wherein the first pipe portion is constituted by a straight pipe extending linearly. The combine according to any one of claims 1 to 6 , wherein the second pipe portion is supported by the threshing device. The second pipe portion has a front side divided pipe to which the first pipe portion is connected, and a rear side having a larger diameter than the front side divided pipe and connected to a rear end of the front side divided pipe. together and a split tube, any one of the 7 claims 1 can be introduced outside air from between the outer periphery of the front end portion of the rear-side split tube and the outer periphery of the rear end portion of the front side split pipe Combine as described in. The front side divided pipe is composed of a bent pipe in which a bent portion is formed in the middle part of the front and rear,
The combine according to claim 8 , wherein the rear-side divided pipe is configured by a straight pipe extending linearly.

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