CN115299238A

CN115299238A - Harvester

Info

Publication number: CN115299238A
Application number: CN202210917507.8A
Authority: CN
Inventors: 小田佑树; 安田和男; 迫和志
Original assignee: Kubota Corp
Current assignee: Kubota Corp
Priority date: 2015-12-22
Filing date: 2016-12-09
Publication date: 2022-11-08
Anticipated expiration: 2036-12-09
Also published as: WO2017110530A1

Abstract

The invention provides a harvester, which comprises a running machine body, a power unit and a power unit, wherein the running machine body is provided with: a driver unit having a driver seat (10); an engine room (43) located below the driver seat (10) and having an engine (44); an exhaust gas purification device (48) for reducing nitrogen oxides contained in exhaust gas of an engine (44), wherein the exhaust gas purification device (48) is provided in an engine room (43).

Description

Harvester

The present application is a divisional application of the following applications:

the invention name is as follows: harvester application number: 201611131898.1

Technical Field

The invention relates to the field of harvesters.

Background

(1) As a harvester, for example, there is a combine harvester, a corn harvester, or the like which is equipped with an engine and performs a harvesting operation in general by running a traveling machine body by power of the engine.

In recent years, it has been desired to reduce nitrogen oxides contained in exhaust gas. In this case, there are harvesters with an exhaust gas purification device for removing nitrogen oxides in the exhaust gas path of the engine. The exhaust gas purification device mixes urea water with exhaust gas to generate ammonia, and reduces nitrogen oxides (NOx) contained in the exhaust gas by the reduction action of the ammonia.

In a conventional combine harvester, which is an example of a harvester, an exhaust gas purification device is provided between a threshing device and a grain tank located on the rear side of a machine body, and a urea water tank for storing urea water is provided in a space above an engine on the front side of the machine body (see, for example, patent document 1).

(2) As a harvester, there is a combine harvester, a corn harvester, or the like that harvests crops as a machine body travels.

In the related art, a combine harvester, which is an example of a harvester, has a power unit having an engine and an exhaust gas purification device for purifying exhaust gas from the engine, below a driver's seat, and an exhaust pipe for guiding the exhaust gas purified by the exhaust gas purification device rearward through a lower portion of a traveling machine body and discharging the exhaust gas outward (see, for example, patent document 2).

(3) As a harvester, for example, there is a combine harvester, a corn harvester, or the like which is equipped with an engine and performs harvesting work while running a traveling machine body by power of the engine.

In recent years, it has been desired to reduce nitrogen oxides contained in exhaust gas. There are harvesters with an exhaust gas purification device for removing nitrogen oxides in the exhaust gas path of the engine. The exhaust gas purification device mixes urea water with exhaust gas to generate ammonia, and reduces nitrogen oxides (NOx) contained in the exhaust gas by the reduction action of the ammonia.

In the related art, a combine harvester, which is an example of a harvester, is provided with a urea water tank for storing urea water in a space located above an engine room in a front portion of a machine body and behind a driver seat. The exhaust gas purification device is provided in a space between the threshing device and the grain tank at a rear side of the machine body, and the fuel tank is disposed at the rear side of the machine body (see, for example, patent document 1).

(4) As a harvester, for example, there is a combine harvester, a corn harvester, or the like, which has a traveling machine body and a harvesting unit located on the front side of the traveling machine body and harvesting crops as they travel.

The harvester is equipped with an engine, and performs harvesting work while driving a traveling machine body by power of the engine. In recent years, it has been desired to reduce nitrogen oxides contained in exhaust gas. In this case, there are harvesters with an exhaust gas purification device for removing nitrogen oxides in the exhaust gas path of the engine. The exhaust gas purification device mixes urea water with exhaust gas to generate ammonia, and reduces nitrogen oxides (NOx) contained in the exhaust gas by the reduction action of the ammonia.

In a conventional combine harvester, which is an example of a harvester, an exhaust gas purification device is provided in a space between a threshing device and a grain tank located on the rear side of a machine body, and a urea water tank for storing urea water is provided in a space above an engine on the front side of the machine body (see, for example, patent document 1).

(Prior art documents)

(patent document)

Patent document 1: japanese patent application publication No. Tokukai 2014-193120 "

Patent document 2: japanese invention patent application publication "JP 2013-1"

Disclosure of Invention

(problems to be solved by the invention)

(1) The problem corresponding to the background art (1) is as follows.

In the above-described conventional configuration, since the exhaust gas purification device is provided at a position away from the engine, a long pipe is required to guide the flow of the high-temperature exhaust gas discharged from the engine to the exhaust gas purification device, and the long pipe needs to be subjected to heat insulation treatment or the like, which leads to a problem that the pipe structure is complicated.

Here, it is desirable to simplify the structure for exhaust gas treatment when a facility for exhaust gas treatment is provided.

(2) The problem corresponding to the background art (2) is as follows.

In the above-described conventional structure, since the exhaust gas from the engine is discharged to a small space below the machine body, the exhaust gas is hard to diffuse into the atmosphere outside the machine body, and there is a possibility that high-temperature exhaust gas is accumulated in the space below the machine body. As a result, the high-temperature exhaust gas adversely affects crops in an unharvested area adjacent to a traveling body traveling in the field, and the like. Further, soil in the field may be splashed on the exhaust pipe, or deterioration of the exhaust pipe may be accelerated.

Here, it is desired to easily diffuse exhaust gas from the engine into the atmosphere quickly while improving durability of the exhaust pipe.

(3) The problem corresponding to the background art (3) is as follows.

In the harvester having the above-described configuration, the urea water stored in the urea water tank is consumed as the engine operates, and therefore, when the remaining amount decreases, the urea water needs to be replenished. On the other hand, the fuel stored in the fuel tank is consumed as the engine operates, and therefore, it needs to be replenished.

In the above-described conventional structure, since the urea water tank and the fuel tank are provided at separate locations, for example, when urea water and fuel are replenished simultaneously before performing work, the urea water and the fuel have to be replenished at the separate locations, respectively, which results in a reduction in work efficiency.

Here, it is desired to improve the work efficiency when replenishing the urea water and the fuel.

(4) The problem corresponding to the background art (4) is as follows.

Here, it is desirable to provide equipment necessary for exhaust gas treatment without affecting the layout of other devices and to simplify the structure for exhaust gas treatment.

(means for solving the problems)

(1) The solution corresponding to the problem (1) is as follows.

The harvester of the invention is characterized in that,

the traveling machine body includes: a driver part having a driver seat; an engine room located below the driver seat and having an engine; and an exhaust gas purification device for reducing nitrogen oxides contained in exhaust gas of the engine,

the exhaust gas purification device is provided in the engine room.

According to the present invention, since the exhaust gas purification device is provided in the engine room located below the driver seat, the engine and the exhaust gas purification device are provided in the engine room. Therefore, the engine and the exhaust gas purification device can be disposed in a state close to each other, and the piping for the exhaust gas flow connecting the engine and the exhaust gas purification device can be shortened and the piping structure can be simplified.

In the present invention, it is preferable that the exhaust gas purification device is provided above the engine.

According to this configuration, the exhaust gas purification device can be rationally arranged without affecting the arrangement of other devices by using the space above the engine.

In the present invention, it is preferable that the exhaust gas purification device is supported by being placed on an upper portion of the engine.

According to this configuration, the exhaust gas purification device can be supported in a stable state by the strong housing of the engine.

In the present invention, it is preferable that,

the engine is located behind the front longitudinal wall portion of the engine room,

the position of the front end portion of the exhaust gas purification device in the front-rear direction of the engine body is the same as or substantially the same as the position of the front end portion of the engine in the front-rear direction of the engine body when viewed from the side of the engine body.

According to this configuration, the exhaust gas purification device is located at the same or substantially the same position in the front-rear direction as the front end portion of the engine when viewed from the side of the engine body, and therefore, the exhaust gas purification device does not protrude toward the front side of the engine body of the engine.

If the exhaust gas purification device protrudes toward the front side of the engine, a significant structural improvement such as a change in the position of the front vertical wall portion of the engine compartment is required, and according to this structure, the exhaust gas purification device can be installed without requiring the above structural improvement and without changing the arrangement structure of other devices in the engine compartment.

In the present invention, it is preferable that,

the driver seat is provided above the engine,

a landing entrance for passengers to get in and out is arranged at the lateral side of the driving seat,

a side panel is provided on a lateral side of the driver seat opposite to the entrance,

the exhaust gas purification device is disposed in the engine room below the side panel in a state where the longitudinal direction of the exhaust gas purification device is along the front-rear direction of the engine body.

In general, a harvester has various types of operating elements on a side panel provided on the opposite side of a boarding/alighting opening of a driver seat, and the side panel is provided at a position higher than a support base of the seat to such an extent that an elbow of a driver seated in the driver seat can be placed thereon, and is formed in a shape elongated in the front-rear direction.

Here, according to this configuration, the exhaust gas purification device is provided below the side panel in a state where the longitudinal direction is along the front-rear direction of the body, whereby the space below the side panel can be effectively used, and the exhaust gas purification device can be arranged without affecting the arrangement of other devices.

In the present invention, it is preferable that,

another exhaust gas purification apparatus that reduces particulate matter contained in exhaust gas of the engine is installed between the engine and the exhaust gas purification apparatus,

the other exhaust gas purification device is provided in the engine room.

According to this configuration, the engine room is provided with an exhaust gas purification device for reducing nitrogen oxides contained in the exhaust gas and another exhaust gas purification device for reducing particulate matter contained in the exhaust gas, respectively. The waste gas of engine passes through other exhaust gas purification device, after having reduced particulate matter, reduces nitrogen oxide through exhaust gas purification device again to can further purify waste gas.

Since the exhaust gas purification device and the other exhaust gas purification device are provided in the engine room, they can be provided in a state close to the engine, and the piping for the exhaust gas flow connecting the engine, the exhaust gas purification device, and the other exhaust gas purification device can be shortened and the piping structure can be simplified.

In the present invention, it is preferable that the other exhaust gas purification device is provided on a side opposite to a side where a radiator cooling fan of the engine is present.

According to this configuration, the cooling air generated by the radiator cooling fan passes through the periphery of the radiator and the engine, and passes through the periphery of the other exhaust gas purification device, and is discharged to the outside. That is, the other exhaust gas purification device is provided on the downstream side of the cooling air. Therefore, the high-temperature air around the other exhaust gas purification device, which is likely to reach a high temperature due to the passing of the exhaust gas, can be directly discharged to the outside without passing through the engine room.

In the present invention, it is preferable that a portion of the other exhaust gas purification device on the opposite side in the left-right direction from the radiator cooling fan protrudes outward of the engine room from an end portion of the engine room on the opposite side in the left-right direction from the radiator cooling fan.

When another exhaust gas purification device is provided near the engine in order to reduce particulate matter contained in the exhaust gas, the other exhaust gas purification device may be entirely housed in the engine compartment, and the periphery thereof may be surrounded by a member forming the engine compartment, such as an engine hood.

However, in the above-described configuration, heat of the other exhaust gas purification device that has reached a high temperature due to the passage of the exhaust gas is accumulated in the engine room, and the temperature in the engine room may increase. When the entire exhaust gas purification apparatus, which is a large-sized apparatus, is housed in the engine room, the engine room may protrude upward, and the space of the driver's seat may be narrowed, which may adversely affect the surrounding area of the engine room.

In contrast, according to this configuration, since the other exhaust gas purification device protrudes outward from the engine room from the end portion on the opposite side of the radiator cooling fan, the high-temperature air around the other exhaust gas purification device can be easily discharged outward without being collected in the engine room. Further, since it is not necessary to forcibly house the entire other exhaust gas purification device in the engine room surrounded by the partition wall, it is possible to reduce the influence on the surrounding area, such as the reduction of the space of the cab.

In the present invention, it is preferable that the exhaust emission control device further includes a cover body that covers an upper side, a front side, and a lateral side of a purification device protruding portion of the other exhaust emission control device that protrudes outward from the engine room.

According to this configuration, the cover body can prevent grass clippings, fine dust, and the like generated in association with harvesting from falling on the purifying device projecting portion of another exhaust gas purifying device from the upper side or the lateral side or from the front side in association with traveling of the machine body, thereby preventing adverse effects caused by dust falling on another exhaust gas purifying device.

In the present invention, it is preferable that a lateral side cover part of the cover covering the purification apparatus protrusion part from a lateral side is a porous member, and a rear side of the purification apparatus protrusion part is opened.

According to this configuration, the high-temperature air around the other exhaust gas purifying devices can be released to the outside of the lateral side from the plurality of holes formed in the lateral side cover portion, and the high-temperature air can be released to the outside of the rear from the rear side of the opened purifying device projecting portion. As a result, the problem of excessive temperature rise due to heat accumulation around another exhaust gas purification device can be further easily avoided. Further, since the cover body is open at the rear of the projecting portion of the purification device, dust can be prevented from falling on another exhaust gas purification device, and the heat release effect can be improved as compared with the case where dust is released only from the plurality of holes.

In the present invention, it is preferable that the other exhaust gas purification device is supported by the engine.

According to this configuration, the other exhaust gas purification device can be supported in a stable state by the strong housing of the engine.

In the present invention, it is preferable that,

the other exhaust gas purification device is provided at a position corresponding to an upper portion of the engine,

the exhaust gas purification device is provided with: an exhaust gas relay unit that mixes the exhaust gas discharged from the other exhaust gas purification device with urea water; and a device main body part for reducing the exhaust gas discharged from the exhaust gas relay part,

the device body portion is located on an upper side of the engine in a state of being located on a side opposite to a side where the radiator cooling fan is present with respect to the engine,

the exhaust gas relay portion is located on an upper side of the other exhaust gas purification device and on a side opposite to a side where the radiator cooling fan is present with respect to the device main body portion.

According to this configuration, the other exhaust gas purification device is located at a position corresponding to the upper portion of the engine, and therefore, the other exhaust gas purification device can be appropriately arranged without affecting the arrangement of the other device by utilizing the space above the engine. The exhaust gas purification device is located on the side opposite to the side where the radiator cooling fan is located, the device body is located above the engine, and the exhaust gas relay portion is located above the other exhaust gas purification devices.

Therefore, the exhaust gas purification device is provided downstream of the cooling air of the radiator cooling fan, and the high-temperature air around the exhaust gas purification device, which tends to reach a high temperature, can be directly discharged to the outside without passing through the engine compartment. Further, the exhaust gas purifying device and another exhaust gas purifying device can be arranged in a small size above the engine.

In the present invention, it is preferable that a portion of the exhaust gas relay portion on a side opposite to the radiator cooling fan in the left-right direction protrudes outward of the engine room from an end portion of the engine room on a side opposite to the radiator cooling fan in the left-right direction.

According to this configuration, as in the case of the other exhaust gas purification apparatus described above, since the exhaust gas relay section projects outward from the engine room from the end portion on the opposite side to the radiator cooling fan, the high-temperature air around the exhaust gas relay section can be easily discharged outward without being collected in the engine room. Further, since it is not necessary to forcibly house the entire exhaust gas relay portion in the engine room surrounded by the partition wall, it is possible to reduce the influence of the space of the cab portion on the surrounding area.

In the present invention, it is preferable that a cover body is provided to cover an upper part, a front part, and lateral sides of a relay portion protruding outward from the engine room of the exhaust gas relay portion.

According to this configuration, the cover body can prevent grass clippings, fine dust, and the like generated in association with the harvesting operation from falling on the relay projecting portion of the exhaust gas relay portion from the upper side or the lateral side or from the front side in association with the travel of the machine body, thereby preventing the dust from falling on the exhaust gas relay portion and causing adverse effects.

In the present invention, it is preferable that a lateral side cover part of the cover body covering a lateral side of the relay protrusion is formed of a porous member, and a rear side of the relay protrusion is opened.

According to this configuration, the high-temperature air around the exhaust gas relay section can be released to the outside of the lateral side from the plurality of holes formed in the lateral side cover portion, and the high-temperature air can be released to the outside of the rear side from the rear side of the opened relay section protruding portion. As a result, the problem of excessive temperature rise due to heat accumulation around the exhaust gas relay portion can be further easily avoided. Further, since the cover body is open rearward of the relay portion projecting portion, dust can be prevented from falling on the exhaust gas relay portion, and the heat release effect can be improved as compared with the case where dust is released only from the plurality of holes.

In the present invention, it is preferable that the other exhaust gas purification device is provided below the exhaust gas relay section,

a portion of the other exhaust gas purification device on the side opposite to the radiator cooling fan in the left-right direction protrudes outward of the engine room from an end portion of the engine room on the side opposite to the radiator cooling fan in the left-right direction,

a portion of the exhaust relay section on a side opposite to the radiator cooling fan in the left-right direction protrudes outward of the engine room from an end portion of the engine room on a side opposite to the radiator cooling fan in the left-right direction.

According to this configuration, since the other exhaust gas purifying device and the exhaust gas relay unit each project outward from the engine room, the high-temperature air around the other exhaust gas purifying device and the exhaust gas relay unit can be easily discharged to the outside without being collected in the engine room. Further, since it is not necessary to forcibly house the entire other exhaust gas purification device and exhaust gas relay section in the engine room surrounded by the partition wall, it is possible to reduce the influence of the narrowing of the cabin space and the like on the surrounding area.

In the present invention, it is preferable that a cover body is provided to cover an upper part, a front part, and a lateral side of a purification device projecting portion projecting outward from the engine room of the other exhaust gas purification devices and a relay portion projecting outward from the engine room of the exhaust gas relay portion.

According to this configuration, the cover body can prevent grass clippings, fine dust, and the like generated in association with the harvesting operation from falling on the purifying device projecting portion of another exhaust gas purifying device and the relay portion projecting portion of the exhaust gas relay portion from the upper side or the lateral side, or from the front side in association with the travel of the machine body, thereby preventing the dust from falling on another exhaust gas purifying device and the exhaust gas relay portion and causing adverse effects.

In the present invention, it is preferable that a lateral side cover part of the cover covering lateral sides of the purification device projecting part and the relay part projecting part is formed of a porous member,

the purification device projection and the relay projection are open at the rear.

According to this configuration, high-temperature air around the other exhaust gas purification devices and the exhaust gas relay can be released to the outside of the lateral side from the plurality of holes formed in the lateral side cover portion, and high-temperature air can be released to the outside of the rear from the rear side of the purification device protruding portion and the relay protruding portion that are open. As a result, the problem of excessive temperature rise due to heat accumulation around other exhaust gas purification devices and the exhaust gas relay portion can be further easily avoided. Further, since the cover body is open rearward of the purification device protrusion and the relay protrusion, dust can be prevented from falling onto other exhaust gas purification devices and the exhaust gas relay, and the heat release effect can be improved as compared with the case where dust is released only from the plurality of holes.

In the present invention, it is preferable that the cover has: a first cover body portion covering an upper side and a lateral side of the relay portion projecting portion; and a second cover body portion covering a lateral side of the protruding portion of the purification apparatus,

the purification device projecting portion projects further to the outside than the relay projecting portion,

the first cover body portion and the second cover body portion are arranged in the vertical direction in a state where the second cover body portion protrudes outward beyond the first cover body portion to form a step in the horizontal direction.

Since the other exhaust gas purification device, which is generally larger than the exhaust gas relay portion, is protruded outward than the exhaust gas relay portion, it is not necessary to forcibly house the whole of the other exhaust gas purification device and the exhaust gas relay portion in the engine room surrounded by the partition wall, and thus, the influence on the surrounding area, such as the narrowing of the space of the cab portion, can be reduced.

The cover body includes a first cover body portion and a second cover body portion arranged in the vertical direction, the first cover body portion covers the relay unit protruding portion, the second cover body portion covers the purification apparatus protruding portion, the second cover body portion protrudes outward beyond the first cover body portion, and a step is formed in the horizontal direction between the second cover body portion and the first cover body portion.

With the above configuration, the first cover part is close to the exhaust gas relay part, and the second cover part is close to another exhaust gas purifying device, so that the outer space formed above the step can be effectively used as a passage area for wiring, piping, and the like without excessively protruding the cover. Further, by forming the first cover body portion and the second cover body portion in a divided manner, when maintenance work such as cleaning is performed, the work can be performed easily by only removing necessary portions without removing the entire cover body.

In the present invention, it is preferable that,

the other exhaust gas purification device has an exhaust gas inlet portion on a front side that receives exhaust gas from the engine and an exhaust gas outlet portion that discharges the exhaust gas after purification treatment on a rear side,

the exhaust gas purification device has an exhaust gas inlet portion on the front side that receives the exhaust gas supplied from the other exhaust gas purification device via the exhaust gas relay portion, and an exhaust gas outlet portion that discharges the exhaust gas after the purification treatment, on the rear side.

According to this configuration, the other exhaust gas purifying device forms an exhaust gas flow path inside the device, receives the exhaust gas discharged from the engine from the exhaust gas inlet on the front side, performs the particulate matter reduction treatment while flowing the exhaust gas to the rear side of the machine body, and then discharges the exhaust gas from the exhaust gas outlet on the rear side,

the exhaust gas purifying device forms an exhaust gas flow path, so that exhaust gas discharged from another exhaust gas purifying device flows to the front side of the machine body while being mixed with urea water through the exhaust gas relay part, is supplied to the device body, flows to the rear side of the machine body in the device body, and is discharged from the exhaust gas outlet part.

The exhaust gas purification device and another exhaust gas purification device can be arranged in a small size above the engine, and the exhaust gas can be made to flow reasonably so that the exhaust gas flow path can be shortened as much as possible.

In the present invention, it is preferable that,

has a threshing device for threshing the harvested crops,

the driving part is provided on one side in the left-right direction of the traveling machine body and the threshing device is provided on the other side in the left-right direction of the traveling machine body in a state where the rear part of the driving part and the front part of the threshing device overlap each other when viewed from the side of the machine body,

an exhaust pipe is connected to the rear side of the exhaust gas purification device, and the exhaust pipe releases the purified exhaust gas to the outside,

the exhaust pipe extends upward between the rear portion of the cab and the front portion of the threshing device.

According to this configuration, the exhaust duct can be provided without limiting the arrangement of other devices by using the space between the rear portion of the cab and the front portion of the threshing device. Since the exhaust pipe discharges the exhaust gas from the upper side of the body, the exhaust gas can be easily diffused to the outside.

In the present invention, it is preferable that,

a grain box is arranged in parallel with the threshing device in the transverse direction,

a winnowing device is arranged at the front side of the grain box and the lateral side of the threshing device, the winnowing device conveys the grains discharged from the threshing device to the grain box,

the exhaust pipe extends to the upper part of the grain raising device at the front part of the grain raising device, an exhaust port is formed at the upper end part,

the air outlet is arranged above the winnowing device and is open towards the side of the threshing device.

According to this structure, the blast pipe extends the top that sets up the winnowing device, and in addition, the gas vent of upper end is to the thresher side opening, and consequently, can directly not drop on the grain case and the winnowing device that have the grain in inside from gas vent exhaust waste gas, and the bad influence that brings for the grain is less.

In the present invention, it is preferable that,

comprising: a body frame supporting the entire traveling body; and a vertical frame erected from the machine body frame and supporting a rear side of the steering section,

the vertical frame supports an auxiliary device of the exhaust gas purification apparatus.

According to this configuration, the auxiliary equipment of the exhaust gas purification device is supported by the vertical frame for supporting the driver's part, and therefore, the auxiliary equipment can be stably operated with less vibration as compared with a case where the auxiliary equipment is supported by an engine or a device provided integrally with the engine, for example.

In the present invention, it is preferable that the vehicle further comprises an engine cover which is formed with the engine room in a divided manner,

the driver seat is supported at a portion of an upper portion side portion of the engine cover located above the engine,

a convex portion protruding upward is formed at a portion of an upper portion side portion of the hood located on a lateral side of the driver seat,

the exhaust gas purification device is disposed in a protrusion formation region of the engine room corresponding to the protrusion.

According to this configuration, the exhaust gas purification device can be provided in a small size at a location that avoids the driver seat and has a relatively large amount of space.

(2) The solution corresponding to the problem (2) is as follows.

The harvester of the invention is characterized in that the running machine body is provided with: an engine; a driver part having a driver seat; an exhaust gas treatment device located below the driver seat for purifying exhaust gas from the engine; and an exhaust pipe that discharges the exhaust gas treated by the exhaust gas treatment device to the outside, the exhaust pipe extending upward in a rear side of the driver seat.

According to the present invention, since the exhaust pipe extends upward, the exhaust gas from the engine is guided to the upper side and is released to the outside from the high position of the traveling machine body. By releasing the exhaust gas at a higher position as described above, the exhaust gas can be diffused rapidly in the atmosphere. Further, since the exhaust pipe extends upward on the rear side of the driver seat, it is possible to reduce the possibility that the line of sight of the driver sitting on the driver seat is blocked by the exhaust pipe extending upward, thereby adversely affecting the driving operation. Moreover, the problem that the soil of the farmland splashes on the exhaust pipe so as to accelerate the deterioration of the exhaust pipe is avoided.

Therefore, the durability of the exhaust pipe can be improved without adversely affecting the driving operation, and the exhaust gas from the engine can be easily diffused into the atmosphere.

In the present invention, it is preferable that the traveling machine body includes a threshing device that threshes a harvested crop and a grain tank that stores grains, the threshing device being arranged in a left-right direction, and the exhaust duct extends upward in a space surrounded by a rear portion of the cab, a center side portion of a front portion of the threshing device in the left-right direction, and a center side portion of the front portion of the grain tank in the left-right direction, and is supported by a rear portion of the cab.

According to this configuration, the space surrounded by the driving unit, the threshing device, and the grain tank can be effectively utilized, and the exhaust pipe can be provided without interfering with other devices. Since the periphery of the exhaust pipe is surrounded by a large-sized device such as the threshing device, the grain box, and the driving part, the operator does not touch the exhaust pipe carelessly from the outside of the machine body.

Further, since the exhaust pipe is supported at the rear of the cab, the unstable support state due to vibration of the engine body can be reduced. Instead of this structure, for example, it is also conceivable to support the exhaust pipe on the threshing device. However, the threshing device vibrates as the threshing cylinder rotates, and the threshing device and the exhaust pipe connected to the engine have different vibration cycles. As a result, in the configuration in which the exhaust pipe is supported by the threshing device, there is a possibility that the support state of the exhaust pipe becomes unstable due to the breakage of the portion supporting the exhaust pipe in accordance with the long-term use, depending on the vibration cycle. In contrast, in the structure in which the exhaust pipe is supported at the rear of the cab, there is no vibration source in the cab, and the vibration of the exhaust pipe and the vibration of the engine have substantially the same period of vibration, so that the above-described disadvantage can be eliminated and a good support state can be maintained.

In the present invention, it is preferable that the cab has a cab covering a space above the driver seat,

the upper portion of the exhaust pipe is supported at the rear of the cab.

In order to cover the space above the driver's seat, the cab is provided to be large and strong. According to this configuration, since the exhaust pipe is supported by the cab, the exhaust pipe can be easily supported in a stable state. Further, since the upper portion of the exhaust pipe extending upward in a cantilever shape is supported at the rear portion of the cab, the exhaust pipe can be supported in a stable state without rattling.

In the present invention, it is preferable that the exhaust pipe has bent portions formed at a lower portion and an upper portion, respectively, and the lower portion and the upper portion are supported at a rear portion of the cab, respectively.

In general, the portion of the exhaust pipe where the bent portion is formed has a greater strength than the straight pipe portion extending linearly and long. Here, according to this configuration, since the portions with high strength located on both the upper and lower sides are supported by the cab, the exhaust pipe can be supported in a stable state.

In the present invention, it is preferable that the exhaust pipe has a lower cover body covering a lower portion of the exhaust pipe,

the lower cover body has: a vertical wall portion surrounding the periphery of the exhaust pipe; and an upper cover portion that covers a gap between an upper portion of the vertical wall portion and an outer periphery of the exhaust pipe.

According to this configuration, the periphery of the lower portion of the exhaust pipe can be covered by the vertical wall portion of the lower cover member, and the gap between the upper portion of the vertical wall portion and the outer periphery of the exhaust pipe can be covered by the upper cover member, so that the discharged grass clippings, dust and the like generated in association with the work can be prevented from falling down to the high-temperature exhaust gas purification device located below through the space around the exhaust pipe.

In the present invention, it is preferable that an upper cover is provided that covers an upper portion of a portion of the exhaust pipe covered by the lower cover.

According to this configuration, since the exhaust pipe is covered by the upper cover body and the lower cover body over substantially the entire area in the vertical direction, not only can the discharged grass clippings and the like be prevented from falling on the exhaust pipe, but also the operator can be prevented from inadvertently touching the exhaust pipe.

In the present invention, it is preferable that a bent portion is formed at a lower portion of the exhaust pipe,

the portion of the exhaust pipe on the lower side of the bent portion is covered by the lower cover,

the portion of the exhaust pipe above the bent portion is covered by the upper cover.

According to this configuration, since the lower cover and the upper cover are separated at the portion corresponding to the bent portion, the lower cover and the upper cover do not need to have complicated shapes in the region corresponding to the bent portion, and the shapes can be simplified.

In the present invention, it is preferable that the traveling machine body has a threshing device for threshing the harvested crop and a grain tank for storing grains, the threshing device being arranged in the left-right direction,

a winnowing device is arranged at the lateral side part of the front side part of the grain box, which is close to the threshing device, the winnowing device conveys grains discharged from the threshing device to the grain box,

the exhaust pipe extends to the upper side of the winnowing device through the front upper part of the winnowing device,

an exhaust port is formed at an upper end portion of the exhaust pipe,

According to this structure, the blast pipe extends the top that sets up the winnowing device, and moreover, the gas vent of upper end portion is to the thresher side opening, consequently, can not discharge the grain case and the winnowing device that have the kernel inside from gas vent exhaust waste gas, and is less to the bad influence of kernel.

(3) The solution corresponding to the problem (3) is as follows.

The harvester of the invention is characterized in that the traveling machine body is provided with: an engine; a fuel tank storing fuel supplied to the engine; an exhaust gas purification device that reduces nitrogen oxides contained in exhaust gas of the engine; and a urea water tank storing urea water for supply to the exhaust gas purification apparatus, the urea water tank being provided at a position adjacent to the fuel tank.

According to the present invention, since the urea water tank is provided at a position adjacent to the fuel tank, when urea water and fuel are replenished, urea water and fuel can be replenished at the same place, and thus the work efficiency can be improved.

In the present invention, it is preferable that the fuel tank is supported by a body frame, and the urea water tank is disposed above the fuel tank.

In order to extend the operation time from the refueling to the next refueling, it is desirable to increase the storage amount of the fuel tank. Here, in this structure, the large fuel tank can be stably supported by the body frame. On the other hand, a relatively small urea water tank is provided above the fuel tank. As a result, the space above the fuel tank can be effectively utilized, and the urea water tank can be appropriately provided without affecting the arrangement of other components.

In the present invention, it is preferable that the fuel tank is supported by the body frame in a state where a lower end portion thereof enters a lower side of an upper surface of the body frame.

According to this structure, the fuel tank can be disposed at a lower position with respect to the body frame. The upper and lower positions of the urea water tank above the fuel tank can be lowered, and the urea water can be easily replenished. Further, by providing a large and heavy fuel tank at a low position, the center of gravity of the engine body can be lowered and the running stability can be improved.

In the present invention, it is preferable that a support frame for supporting the urea water tank be provided, and the support frame extend upward from the body frame while passing through a side of the fuel tank.

In order to support the urea water tank directly on the upper portion of the fuel tank, it is necessary to further enhance the support strength of the fuel tank. In contrast, according to the present configuration, the urea water tank can be stably supported by the support frame without increasing the support strength of the fuel tank.

In the present invention, it is preferable that the travel machine body has a grain tank for storing grains,

a grain discharging device which is arranged at the rear part of the grain box and discharges the grains in the grain box to the outside,

the supporting frame is arranged at the rear end part of the traveling machine body, and the grain discharging device is supported on the supporting frame.

According to this configuration, since the supporting frame for supporting the urea water tank also serves as the supporting frame for supporting the grain discharging device, the supporting structure can be simplified as compared with a configuration in which a supporting frame dedicated to the grain discharging device is provided in addition to the supporting frame for the urea water tank.

In the present invention, it is preferable that a pump is provided for delivering the urea water stored in the urea water tank to a consumption site, the urea water tank is supported by a rear portion of the support frame, the pump is supported by a front portion of the support frame, and the exhaust gas purification device is provided on a front side of the pump.

According to this configuration, the urea water in the urea water tank can be supplied to the exhaust gas purification apparatus by the operation of the pump. The urea water tank is located on the rearmost side, the pump is located on the front side of the urea water tank, and the exhaust gas purification device is located on the front side of the pump, so that the problem that the conveying path of the urea water is too long can be avoided. Further, when the urea solution is replenished from the rear side of the machine body to the urea water tank, the pump does not interfere with the operation, and therefore the urea solution replenishing operation can be performed efficiently.

In the present invention, it is preferable that the support frame includes: a plurality of pillars extending in an up-down direction at front and rear sides of the fuel tank, respectively; and a mounting table spanning upper portions of the plurality of support columns.

According to this configuration, the mounting table is stably supported by the front and rear side pillars provided on both the front and rear sides of the fuel tank. Since the urea water tank is placed on and supported by the mounting table supported as described above, the urea water tank can be stably supported.

In the present invention, it is preferable that the support frame has a replenishment tank mounting table on which a replenishment tank storing urea water to be replenished to the urea water tank can be mounted and supported.

According to this configuration, when replenishing the urea water in the urea water tank, the operator places the replenishment container storing the urea water for replenishment on the replenishment container placement table to receive the weight, and in this state, the operator can easily perform the replenishment work with a small weight burden.

In the present invention, it is preferable that a harvesting part for harvesting a crop while the traveling machine body travels is provided in front of the traveling machine body, and the fuel tank and the urea water tank are provided at a rear end portion of the traveling machine body.

According to this configuration, since the harvesting portion is provided on the front side of the traveling machine body, the front-rear weight balance of the entire machine body is likely to be in a front-heavy state. Here, by providing the fuel tank and the urea water tank at the rear end portion of the travel machine body, the front-rear weight balance can be improved.

Since the fuel tank and the urea water tank are provided at the rear end portion of the traveling machine body when replenishing the fuel and the urea water, the fuel tank and the urea water tank can be located at a relatively close position when performing work from the rear side of the machine body, and therefore the work can be easily performed.

In the present invention, it is preferable that a rear cover is provided to cover each of the fuel tank and the urea water tank from a rear side,

the rear cover is capable of changing its posture between an operating state in which the rear cover covers the fuel tank and the urea water tank and a non-operating state in which the rear side of the fuel tank and the urea water tank is open.

According to this configuration, when the rear cover is in an operating state during harvesting work or the like, the fuel tank and the urea water tank can be covered from the rear side, and damage to the fuel tank and the urea water tank due to contact with an external obstacle can be prevented. On the other hand, when replenishing the fuel and the urea water, it is possible to change the posture of the rear cover to the inactive state.

In the present invention, it is preferable that the oil supply port of the fuel tank is provided on a rear side of the fuel tank,

the water feeding port of the urea water tank is arranged on the rear side of the urea water tank.

According to this configuration, when the replenishing operation is performed from the rear side of the body, since both the oil supply port and the water supply port are located close to the operator, the replenishing operation can be performed easily without complication.

In the present invention, it is preferable that the oil supply port projects rearward from a rear wall portion of the fuel tank.

According to this configuration, since the fuel supply port of the fuel tank projects rearward from the rear wall portion of the body, the urea water tank positioned above the fuel tank can be positioned as close as possible to the upper wall portion of the fuel tank. Even if the urea water tank is arranged close to the upper wall portion, the fuel replenishing operation from the oil supply port is not hindered.

Therefore, the urea water tank can be set at a low position without hindering the fuel replenishment operation.

In the present invention, it is preferable that at least one of the fuel tank and the urea water tank has an identification mark for identifying the fuel tank and the urea water tank.

According to this configuration, even if the fuel supply port of the fuel tank and the water supply port of the urea water tank are arranged along the rear side of the body, when the operator performs the fuel or urea water replenishing operation, the identification mark can identify the fuel supply port and the urea water supply port that need to be supplied. Therefore, appropriate replenishing work can be performed satisfactorily.

In the present invention, it is preferable that the grain tank is provided with a threshing device for threshing the harvested crop and a grain tank for storing the grain, the urea water tank being provided between the threshing device and the grain tank, the threshing device and the grain tank being arranged in the left-right direction.

According to this configuration, grains obtained after threshing the crops by the threshing device are stored in the grain box provided in a state juxtaposed in the left-right direction with the threshing device. In addition, the threshing devices and the grain boxes are arranged on the left side and the right side of the urea water tank, so that the urea water tank is protected by the threshing devices and the grain boxes, and the condition that the urea water tank is damaged due to the fact that the urea water tank touches ridges or other obstacles is reduced.

the exhaust gas purification device is provided at the front of the traveling machine body,

the urea water tank is arranged at the rear part of the traveling machine body,

the piping connecting the urea water tank and the exhaust gas purification device passes through between the threshing device and the grain tank.

According to this structure, the exhaust gas purification device at the front part of the body and the urea water tank at the rear part of the body are connected by a pipe passing between the threshing device and the grain tank. The piping is protected by a threshing device and a grain box. Therefore, the piping can be disposed in a state of reducing damage due to contact with foreign objects by effectively utilizing the empty space between the threshing device and the grain tank.

In the present invention, it is preferable that a winnowing device is provided, the winnowing device is located between the threshing device and the grain box, the winnowing device conveys the grain recovered at the lower part of the threshing device to the upper part of the grain box,

the pipe passes through the threshing device and the winnowing device.

According to this structure, the pipe can be arranged by effectively utilizing the clearance between the threshing device and the winnowing device.

In the present invention, it is preferable that the threshing device further comprises a secondary material returning device which is located between the threshing device and the grain tank and returns the secondary material collected at a lower portion of the threshing device to a front portion of the threshing device,

the piping passes above the secondary product returning device.

In the secondary material returning device, the position for returning the secondary material is the middle position in the vertical direction of the threshing device, and therefore, a vacant space is provided on the upper side. According to this configuration, the piping can be arranged by effectively utilizing the empty space.

In the present invention, it is preferable that a work table is provided above the pipe between the threshing device and the grain box.

According to this configuration, the work table enables the operator to perform maintenance work on the threshing device and the grain tank in a satisfactory manner without adversely affecting the piping.

In the present invention, it is preferable that the work table includes a pipe support member for supporting the pipe, and the work table is supported by the pipe support member.

According to this configuration, the pipe support member supports not only the pipe but also the work table. The structure can be simplified by the dual use of the members.

(4) The solution corresponding to the problem (4) is as follows.

The harvester of the invention is characterized in that,

comprises a traveling machine body and a harvesting part, wherein the harvesting part is positioned at the front side of the traveling machine body and harvests crops along with traveling,

an engine and an exhaust gas purification device provided in a front portion of the traveling machine body, the exhaust gas purification device reducing nitrogen oxides contained in exhaust gas of the engine,

a urea water tank that stores urea water for supply to the exhaust gas purification device is provided at the rear portion of the travel machine body.

According to the present invention, since the engine and the exhaust gas purification device are provided in the front portion of the travel machine body, the engine and the exhaust gas purification device can be brought close to each other, and the piping for the exhaust gas flow connecting the engine and the exhaust gas purification device can be shortened, thereby simplifying the piping structure.

The harvester includes other devices such as a crop processing device for processing a harvested crop, which is located on a rear side of the machine body. The urea water tank is a smaller device than the exhaust gas purification device. Here, by providing the urea water tank as a small-sized device at the rear portion of the traveling machine body, it is possible to provide equipment necessary for exhaust gas treatment without affecting the layout of other devices.

Therefore, the equipment necessary for the exhaust gas treatment can be provided without affecting the layout of other devices, and the structure for the exhaust gas treatment can be simplified.

In the present invention, it is preferable that the urea water tank is provided at a rear end portion of the traveling machine body.

Since the urea water is consumed as the exhaust gas treatment proceeds, the urea water needs to be replenished when the remaining amount becomes small. According to this configuration, since the urea water tank is provided at the rear end portion of the traveling machine body, the urea water tank is exposed to the rear outside of the machine body. As a result, the urea solution can be easily replenished from the rear side of the machine body.

In the present invention, it is preferable that the engine is provided on one side in a left-right direction of the traveling machine body,

a threshing device for threshing the harvested crops is arranged on the other side of the left and right directions of the running machine body,

the urea water tank is provided on one side of the threshing device in the left-right direction.

According to this configuration, the urea water tank is provided on one side in the left-right direction of the threshing device, that is, on the side of the side where the engine is present and the side of the inside of the machine body. As a result, piping can be easily provided between the urea water tank and the exhaust gas purification device provided in a location near the engine, and the urea water tank can be protected by the threshing device.

In the present invention, it is preferable that a pipe connecting the urea water tank and the exhaust gas purification device is provided along a side wall on one side in the left-right direction of the threshing device.

According to this configuration, since the pipe is provided along the side wall of the threshing device, the pipe does not interfere with another device provided on the other side in the left-right direction of the threshing device. That is, the piping can be provided without restricting the installation of other devices.

In the present invention, it is preferable that the pipe is provided along an upper portion of a side wall on one side in the left-right direction of the threshing device.

According to this configuration, since the pipe is provided along the upper portion of the side wall of the threshing device, the pipe does not interfere with devices such as the secondary material returning device provided on the side wall of the threshing device.

In the present invention, it is preferable that a support member for supporting the pipe is provided on one side wall of the threshing device in the left-right direction.

According to this configuration, since the pipe is supported by the support member, the pipe does not shake due to vibration of the machine body, and the posture is stable.

In the present invention, it is preferable that,

the engine is supported by a machine frame in a front portion of the traveling machine body, and the exhaust gas purification device is provided on the engine,

a fuel tank supported on the body frame at a rear portion of the traveling body and having the urea water tank thereon,

the pipe extends substantially linearly.

According to this configuration, the engine is stably supported by the body frame on the front side of the body, and the exhaust gas purification device is provided in the space above the engine. On the rear side of the body, a large fuel tank is stably supported by the body frame, and a urea water tank is disposed in the space above the fuel tank. As described above, the exhaust gas purification device and the urea water tank are provided at a high position above the body frame, and the exhaust gas purification device and the urea water tank located at the high positions are connected by a pipe extending substantially linearly.

The space above the engine and the fuel tank can be effectively used, the exhaust gas purification device and the urea water tank can be reasonably arranged without limiting the arrangement of other devices, and the piping can be shortened and the piping structure can be simplified.

In the present invention, it is preferable that a grain tank is provided on one side of the traveling machine body in the left-right direction in a state of being arranged in the left-right direction with the threshing device,

the urea water tank is arranged between the threshing device and the grain tank.

According to this configuration, grains obtained by threshing the crop by the threshing device are stored in the grain tank arranged in the left-right direction with respect to the threshing device. In addition, the left side and the right side of the urea water tank are provided with the threshing device and the grain tank, so that the urea water tank is protected by a large device such as the threshing device and the grain tank, and the condition that the urea water tank is damaged due to the fact that the urea water tank touches a ridge or other obstacles can be reduced.

In the present invention, preferably, the grain box has a downward inclined surface with a narrow shape,

a fuel tank is provided in a space formed outside the inclined surface of the grain tank between the threshing device and the grain tank,

the urea water tank is provided on the fuel tank.

According to this configuration, the grain tank has the inclined surface having a narrow shape at the bottom, and thus can be guided downward to the conveying device provided at the bottom end, for example, the conveying device including a screw conveyor or the like. Further, by providing the fuel tank in the space outside the grain tank formed in the inclined shape as described above, the capacity of the fuel tank can be increased without restricting other devices.

Drawings

Fig. 1 is an overall left side view of the combine harvester.

Fig. 2 is an overall plan view of the combine.

Fig. 3 is an overall right side view of the combine.

Fig. 4 is a rear view of the combine harvester with the rear cover removed.

Fig. 5 is a rear view of the combine.

Fig. 6 is a side view showing a structure of the exhaust gas purifying pipe.

Fig. 7 is a vertical sectional rear view of the exhaust gas purification apparatus-provided portion.

Fig. 8 is a side view of the periphery of the engine.

Fig. 9 is a rear view showing a support structure of the fuel tank and the urea water tank.

Fig. 10 is a top view of the grain bin and perimeter.

Fig. 11 is a perspective view showing an engine and an exhaust gas treatment device.

Fig. 12 is a side view showing an engine and an exhaust gas treatment device.

Fig. 13 is a plan view of the exhaust pipe arrangement portion.

Fig. 14 is an exploded perspective view showing a support structure of the exhaust pipe cover body.

Fig. 15 is a partial perspective view of the body frame.

Fig. 16 is a perspective view showing a structure for supporting the pipe.

Fig. 17 is a side view of a urea water tank arranging portion of another embodiment.

Description of the reference numerals

1: traveling machine body

2: harvesting part

4: frame of machine body

4a: upper surface of

5: driver's cabin

6: driving part

8: threshing device

8a: side wall

9: grain box

10: driving seat

12: side panel

14: entrance for passengers to land

25: winnowing device

26: secondary object returning device

29: grain discharging device

30: inclined plane

42: engine hood

42a: projecting part

43: engine room

44: engine

46: cooling fan of radiator

47: other exhaust gas purifying apparatus

47t: purification device projection

48: exhaust gas purification device

48A; device body part

48B: exhaust gas relay

48Bt: relay projection part

49: waste gas inlet part

50: exhaust gas outlet

51: waste gas inlet part

52: exhaust gas outlet

54: dust-proof cover

55c: lateral side cover part

56c: lateral side cover part

60: urea water tank

61: exhaust pipe

62: exhaust port

72: lower cover body

72a, 72b: longitudinal wall part

72c: upper cover part

73: upper cover body

75: fuel tank

78: supporting frame

80: support post

81: placing table

82: oil supply mouth

85: pump and method of operating the same

87: piping

100: water supply mouth

107: auxiliary equipment

108: longitudinal frame

110: work bench

201: replenishment container mounting table

E: end of engine room

k: a bent part

Detailed Description

Next, an embodiment of a combine harvester as an example of the harvester of the present invention will be described with reference to the drawings. In this embodiment, when the front-rear direction of the machine body is defined, the machine body is defined along the traveling direction of the machine body in the working state, and when the left-right direction of the machine body is defined, the left-right direction is defined in a state viewed from the traveling direction of the machine body. That is, the direction indicated by the reference symbol (F) in fig. 1, 2, and 3 is the front side of the machine body, and the direction indicated by the reference symbol (B) in fig. 1, 2, and 3 is the rear side of the machine body. The direction indicated by the symbol (L) in fig. 2 is the left side of the body, and the direction indicated by the symbol (R) in fig. 2 is the right side of the body.

(Overall Structure)

Fig. 1, 2 and 3 show a conventional combine harvester as the harvester of the present invention. The combine harvester can harvest rice, wheat, buckwheat, soybean, corn and other crops.

The combine harvester has a traveling machine body 1 and a harvesting part 2 as a harvesting part located on the front side of the traveling machine body 1 and harvesting crops along with traveling. The traveling machine body 1 includes a pair of right and left crawler traveling devices 3 and a machine body frame 4 supported by the traveling devices 3. A harvesting unit 2 is connected to a front portion of the body frame 4 so as to be able to ascend and descend. An operator's section 6 is provided on the right side of the front portion of the traveling machine body 1, and a power section 7 is provided below the operator's section 6. A threshing device 8 for threshing the harvested crops and a grain tank 9 for storing grains obtained by threshing are provided in parallel in the left-right direction of the traveling machine body 1 at the rear part of the machine body.

As shown in fig. 1 and 2, the driving unit 6 is provided on the right side of the traveling machine body 1, which is one side in the left-right direction, and the threshing device 8 is provided on the left side of the traveling machine body 1, which is the other side in the left-right direction, in a state where the rear portion of the driving unit 6 and the front portion of the threshing device 8 are overlapped as viewed from the side of the machine body.

The cab 6 includes a cab seat 10, an instrument panel 11, side panels 12, an operation lever 13, and the like. The cab 6 has a cab 5 covering a space above the driver seat 10. A boarding gate 14 through which a passenger gets in and out is provided on the right side surface of the cab 5. The side panel 12 is provided on the left lateral side of the driver seat 10 on the opposite side of the entrance 14. The side plate 12 includes a main shift lever 15, a working clutch lever 16, and the like.

The harvesting section 2 includes: a pair of left and right dividers 17 for dividing the plant into a reaped object and a non-reaped object; raking into a drum 18, raking into the planted vertical crops; a clipper-type harvesting device 19 for cutting off the plant crop; a screw (20) for gathering the harvested crop toward the center in the harvesting width direction; and a feeder 21 that conveys the harvested crop to the threshing device 8.

In the harvesting section 2, a plant to be harvested, which is separated by the pair of left and right crop dividers 17, is raked by the raking reel 18. The planted crop raked by the raking reel 18 is cut at the root by the harvesting device 19. All of the harvested crops are gathered to the center side in the left-right direction by the auger 20 and are carried to the threshing chamber of the threshing device 8 by the feeder 21.

The threshing device 8 threshes the transported harvested crop by a threshing cylinder 22 provided in the threshing chamber and a receiving net (not shown) provided below the threshing cylinder 22. The threshing processed objects leaked from the receiving net are sorted into grains, discharged grass clippings, and the like by a sorting unit 23 provided below the threshing chamber. The rear part of the body of the threshing device 8 is provided with a grass discharge chopping device 24, and the grass discharge chopping device 24 is used for chopping the discharged grass scraps and discharging the chopped grass scraps to the lower outside.

Although not shown, the grass discharge chopper 24 includes a rotary blade rotating about a horizontal axis and a stationary blade fixed in position, and chops the discharged grass clippings discharged from the rear portion of the thresher 8 and discharges them to the outside. The device also has a guide cover 24a for discharging the cut processed object to the lower outside. As shown in fig. 2, the guide cover body 24a is set in an inclined posture in which the left side surface is along the front-rear direction and the right side surface is positioned on the right side as the rear side of the machine body is closer. With the above configuration, the cut-up processed matter is guided to the lateral center side of the machine body.

As shown in fig. 1 and 2, a bucket conveyor type winnower 25 is provided at a right lateral side of the grain tank 9 on the front side of the machine body and on the threshing device 8 side, and the winnower 25 conveys the grains collected at the lower part of the threshing device 8 to the upper part of the grain tank 9. The grains obtained by the sorting process in the sorting unit 23 are conveyed to the outside of the right lateral side of the thresher 8 by the primary material conveying screw 27, and then conveyed upward by the winnowing device 25 and supplied to the grain box 9.

As shown in fig. 1 and 6, a secondary material returning device 26 is provided, and the secondary material returning device 26 returns secondary materials such as grain with branches collected at the lower part of the threshing device 8 to the front part of the threshing device 8. The secondary material returning device 26 is located between the threshing device 8 and the grain tank 9, and has a winnowing device 25 in a state of being juxtaposed in the left-right direction at the right lateral side of the threshing device 8. Secondary materials such as branched grains generated in the sorting unit 23 are conveyed to the outside of the right lateral side of the threshing device 8 through the secondary material conveying screw 28, and then returned to the upper part of the sorting unit 23 by the secondary material returning device 26.

A grain discharging device 29 is provided at the rear of the grain tank 9, and the grain discharging device 29 discharges grains stored in the grain tank to the outside. The grain discharging device 29 includes: a longitudinal spiral conveyor 29A for conveying the grains upward; and a horizontal screw conveyor 29B for conveying grains in the horizontal direction from the upper end of the vertical screw conveyor 29A and discharging the grains from a discharge port at the top end.

As shown in fig. 4, the grain tank 9 has a lower inclined surface 30 having a narrow lower end when viewed from the front-rear direction of the body. A bottom auger 32 (see fig. 3) is provided at the lower end of the inclined surface 30 inside the grain tank 9, and the bottom auger 32 conveys the stored grains in the front-rear direction to the conveyance starting end of the vertical spiral conveyor 29A of the grain discharging device 29. As shown in fig. 4, the bottom screw 32 and the conveying screw, not shown, of the vertical screw conveyor 29A are linked via a belt transmission mechanism 31, and grains can be transferred from the grain tank 9 to the vertical screw conveyor 29A through a grain passage in the corner box 33.

The vertical spiral conveyor 29A is supported by the machine frame 4 so as to be rotatable about a vertical axis Y (a rotation axis of the vertical spiral conveyor 29A) together with the horizontal spiral conveyor 29B. As shown in fig. 4, a rear-side vertical frame 79 made of a rectangular tube material is provided on the left lateral side of the vertical spiral conveyor 29A. The lower end of the rear side vertical frame 79 is fixed to the body frame 4. The lower end portion of the vertical spiral conveyor 29A is rotatably supported around the vertical axis Y by the corner box 33, and the intermediate portion in the vertical direction is rotatably supported via the support bracket 35 on the upper portion of the rear-side vertical frame 79 in the shape of a rectangular cylinder. The lower end of the vertical spiral conveyor 29A is supported by the machine frame 4 via the corner box 33 and the rotating sleeve portion 36.

The grain tank 9 is supported by the machine frame 4 so as to be rotatable about a vertical axis Y (a rotation axis of the vertical spiral conveyor 29A). The rear lower portion of the grain box 9 is supported via the corner box 33 so as to be rotatable about the vertical axis Y with respect to the rotary sleeve portion 36. The upper rear portion of the grain tank 9 is supported by the vertical spiral conveyor 29A via a support bracket 37 so as to be rotatable about the vertical axis Y.

As shown in fig. 4 and 10, a drive mechanism 38 for rotating the grain discharger 29 about the vertical axis Y is provided on the outer periphery of the corner box 33. The drive mechanism 38 causes a small-diameter gear (not shown) driven by an electric motor 39 to mesh with a large-diameter gear 40 provided on the outer periphery of the vertical spiral conveyor 29A, thereby rotating the grain discharge device 29 about the vertical axis Y.

The rear side vertical frame 79 receives a large load to rotatably support the grain tank 9. Here, the rear side vertical frame 79 is supported by the reinforcement frame 41 extending in the lateral direction from the side wall 8a of the threshing device 8. As shown in fig. 10, the reinforcing frame 41 is formed by bending an angular tube material into a substantially L shape in a plan view. Although not shown, the front-rear direction portion 41A of the reinforcement frame 41 is coupled to the side wall 8a of the threshing device 8, and the lateral portion 41B of the reinforcement frame 41 is coupled to the rear side frame 79. The reinforcing frame 41 is reinforced by coupling a wide plate-shaped reinforcing rib 41C across the front-rear direction portion 41A and the lateral portion 41B.

As shown in fig. 6 and 7, an engine room 43 is formed in the power unit 7 in a state partitioned by the engine cover 42. The engine cover 42 has an upper surface 42a and a front vertical wall portion 42b, and the engine room 43 and the driving space are partitioned by the engine cover 42. The driver seat 10 is supported above the upper surface 42a of the engine cover 42. As shown in fig. 7, a projecting portion 42t projecting upward at a portion of the upper portion side portion of the hood 42 located on the left lateral side of the driver seat 10 is located below the side panel 12, and constitutes a frame of the side panel 12.

(exhaust gas purifying apparatus)

As shown in fig. 7, the engine room 43 includes: a diesel engine 44 (hereinafter simply referred to as "engine"); a radiator 45 for engine cooling; a radiator cooling fan 46 that generates cooling air supplied to the radiator 45; the first exhaust gas purification device 47, which is another exhaust gas purification device, reduces Particulate Matter (PM) contained in the exhaust gas of the engine 44; and a second exhaust gas purification device 48 as an exhaust gas purification device that reduces nitrogen oxides (NOx) contained in the exhaust gas of the engine 44. The engine 44 is disposed in a state of being positioned on the rear side of the front vertical wall portion 42b of the engine cover 42. The second exhaust gas purification device 48 is disposed in a protruding portion formation region of the engine room 43 corresponding to the protruding portion 42t of the engine hood 42.

The first exhaust gas purification device 47 has a Diesel Particulate Filter (DPF) (not shown) of the related art that removes Diesel particulates contained in exhaust gas, and reduces Particulate Matter (PM) by passing exhaust gas therethrough.

The second exhaust gas purification device 48 reduces nitrogen oxides (NOx) contained in the exhaust gas by Selective Catalytic Reduction (SCR). Further, as described below, urea water, which is an example of a reducing agent, is injected into exhaust gas and hydrolyzed to generate ammonia (NH) ₃ ) Chemically reacts with nitrogen oxides (NOx) contained in the exhaust gas, and is reduced to nitrogen (N) ₂ ) And water (H) ₂ O) to reduce nitrogen oxides contained in the exhaust gas.

As shown in fig. 8, a first exhaust gas purification Device (DPF) 47 and a second exhaust gas purification device (SCR) 48 are supported on the upper portion of the engine 44 in a state of being integrally fixed to the engine 44.

As shown in fig. 7, first exhaust gas purification device 47 is provided at a position corresponding to an upper portion of engine 44 on the side opposite to the side where radiator cooling fan 46 is present, that is, on the left side of the body.

As shown in fig. 8, the second exhaust gas purification device 48 includes a large-diameter cylindrical device body 48A extending in the front-rear direction, and a small-diameter cylindrical exhaust gas relay section 48B extending in the front-rear direction in parallel with the device body 48A. The apparatus body 48A is provided on the upper side of the engine 44 and on the first exhaust gas purification apparatus 47 side, i.e., on the left side of the machine body. That is, the device body 48A of the second exhaust gas purification device 48 is located diagonally above the right side of the body of the first exhaust gas purification device 47, and is provided in the lower portion of the side panel 12 in the engine room 43 in a state where the longitudinal direction is along the front-rear direction of the body. The exhaust gas relay section 48B of the second exhaust gas purification device 48 is located on the left side of the device body 48A and on the upper side of the first exhaust gas purification device 47.

As shown in fig. 3 and 8, the position of the front end portion of the second exhaust gas purification device 48 in the front-rear direction of the engine body is the same or substantially the same as the position of the front end portion of the engine 44 in the front-rear direction of the engine body when viewed from the side of the engine body. As with the second exhaust gas purification device 48, the first exhaust gas purification device 47 has the same or substantially the same position in the front-rear direction of the engine body as the position of the front end of the engine 44 in the front-rear direction of the engine body when viewed from the side of the engine body. The front-rear width of the first exhaust gas purification device 47 and the second exhaust gas purification device 48 in the front-rear direction of the engine body is substantially the same as the front-rear width of the engine 44.

As shown in fig. 8, the first exhaust gas purification device 47 has an exhaust gas inlet 49 on the front side that receives exhaust gas from the engine 44, and has an exhaust gas outlet 50 on the rear side that discharges the exhaust gas after purification treatment. The first exhaust gas purification device 47 forms an exhaust gas flow path inside the device, receives exhaust gas discharged from an exhaust unit provided at the front upper portion side of the body of the engine 44 from the front side exhaust gas inlet 49, performs particulate matter reduction processing while flowing the exhaust gas to the rear side of the body, and then discharges the exhaust gas from the rear side.

The device body 48A of the second exhaust gas purification device 48 has an exhaust gas inlet 51 that receives exhaust gas on the front side, and has an exhaust gas outlet 52 that discharges the exhaust gas after the purification treatment on the rear side.

One end of the exhaust gas relay section 48B of the second exhaust gas purification device 48 is connected to the exhaust gas outlet section 50 of the first exhaust gas purification device 47, and the other end is connected to the exhaust gas inlet section 51 of the device main body 48A. An injection nozzle 53 for injecting urea water into the exhaust gas relay section 48B is provided at the rear portion of the exhaust gas relay section 48B.

The second exhaust gas purification device 48 is formed with an exhaust gas flow path so that the exhaust gas discharged from the first exhaust gas purification device 47 flows to the front side of the engine body while being mixed with urea water through the exhaust gas relay section 48B, is supplied to the device main body 48A, flows to the rear side of the engine body in the device main body 48A, and is discharged from the exhaust gas outlet section 52.

As shown in fig. 7, the first exhaust gas purification device 47 is provided below the exhaust gas relay section 48B. An end portion of the first exhaust gas purification device 47 on the opposite side to the radiator cooling fan 46 in the left-right direction protrudes outward of the engine room 43 from an end portion E of the engine room 43 on the opposite side to the radiator cooling fan 46 in the left-right direction. Further, an end portion of the exhaust gas relay section 48B on the opposite side to the radiator cooling fan 46 in the left-right direction protrudes outward of the engine room 43 from an end portion E of the engine room 43 on the opposite side to the radiator cooling fan 46 in the left-right direction.

(cover of exhaust gas purifying apparatus)

As shown in fig. 7 and 11, the exhaust gas purifying device has an outer convex portion cover 54 (hereinafter referred to as "convex portion cover") and the convex portion cover 54 covers the purifying device convex portion 47t of the first exhaust gas purifying device 47 protruding outward from the engine room 43 and the upper, front, and lateral sides of the relay portion convex portion 48Bt of the exhaust gas relay portion 48B protruding outward from the engine room 43.

The projection cover 54 has a first cover body portion 55 and a second cover body portion 56, the first cover body portion 55 covering the upper, front and lateral sides of the relay projection portion 48Bt, and the second cover body portion 56 covering the upper, front and lateral sides of the purge device projection portion 47t. The purge means projecting portion 47t projects further to the outside than the relay projecting portion 48Bt. The first cover body portion 55 and the second cover body portion 56 are arranged in the vertical direction in a state where the second cover body portion 56 protrudes outward beyond the first cover body portion 55 and forms a step in the horizontal direction. The first cover body portion 55 and the second cover body portion 56 are formed separately.

As shown in fig. 11, the first cover body portion 55 includes: a plate-like upper side portion 55a covering the upper side of the relay projecting portion 48 Bt; a plate-like front side portion 55b covering the front of the relay projecting portion 48 Bt; and a lateral side portion 55c as a lateral side cover part covering the lateral side of the relay convex portion 48Bt. The upper portion 55a, the front portion 55b, and the lateral portion 55c are integrally coupled. The lateral side portion 55c is constituted by a perforated metal plate 57 as a porous member.

The second cover body portion 56 has: a plate-shaped upper side portion 56a covering the step portion 58 in the left-right direction with the first cover body portion 55 and covering above the purification apparatus projecting portion 47 t; a plate-like front side portion 56b covering the front of the purification device projecting portion 47 t; and a lateral side portion 56c as a lateral side cover portion covering the lateral side of the purification apparatus protrusion portion 47t. The upper portion 56a, the front portion 56b, and the lateral portion 56c are integrally connected. The lateral side portion 56c is constituted by a perforated metal plate 57 as a porous member.

The boss cover 54 is supported by a cab support frame 59 fixed to the body frame 4. As shown in fig. 11 and 12, cab support frame 59 is provided which is long in the vertical direction, cab support frame 59 supports the center portion in the front-rear direction of the left side surface of cab 5 from below, and the lower end portion of cab support frame 59 is coupled to and supported by body frame 4.

Front portions

55b and 56b of the first cover body portion 55 and the second cover body portion 56 are bolted to the cab support frame 59 via support brackets, not shown. The upper portion 56a of the second cover body portion 56 and the lower portion of the lateral side portion 55c of the first cover body portion 55 are bolted at a plurality of locations, thereby integrally connecting the first cover body portion 55 and the second cover body portion 56.

The respective rear sides of the purge means projecting portion 47t and the relay projecting portion 58Bt are open.

With this configuration, the high-temperature air around the exhaust gas relay section 48B of the second exhaust gas purification device 48 and the first exhaust gas purification device 47 can be discharged to the outside from the plurality of holes formed in the

lateral side portions

55c and 56c and the open portion on the rear side.

As described above, the injection nozzle 53 is provided at the rear portion of the exhaust gas relay section 48B, i.e., at the exhaust gas flow starting end side. The urea aqueous solution is injected from the injection nozzle 53 into the exhaust gas relay section 48B through which the exhaust gas flows. When the urea water is injected into the exhaust gas, the urea water is hydrolyzed to generate ammonia. In the apparatus body 48A, the ammonia (NH) ₃ ) Chemically reacts with nitrogen oxides (NOx) contained in the exhaust gas to reduce the nitrogen oxides (N) ₂ ) And water (H) ₂ O). Thereby, nitrogen oxides (NOx) in the exhaust gas are reduced. The urea aqueous solution supplied to the second exhaust gas purification device 48 is stored in the urea aqueous solution tank 60. This urea water tank 60 will be explained below.

(exhaust pipes)

As shown in fig. 6 and 7, an exhaust pipe 61 for discharging the exhaust gas after the purification treatment to the outside is connected to a rear portion of the second exhaust gas purification device 48. As shown in fig. 13, the exhaust duct 61 extends upward from a space surrounded by a rear portion of the cab 6, a center portion of the front portion of the threshing device 8 in the left-right direction, and a center portion of the front portion of the grain tank 9 in the left-right direction, on the rear side of the cab seat 10.

As shown in fig. 6, 7, and 12, the exhaust pipe 61 is composed of a base-end-side pipe portion 61A connected to the upper portion side of the rear portion of the device body 48A of the second exhaust gas purification device 48 on the machine body, and an upper-end-side pipe portion 61C connected to the base-end-side pipe portion 61A in a state where an outside air inlet port 61B is formed.

As shown in fig. 7, the exhaust duct 61 extends to the upper side of the grain raising device 25 through the front upper side of the grain raising device 25, and an exhaust port 62 is formed at the upper end portion. The air outlet 62 is opened above the winnower 25 toward the threshing device 8. The exhaust pipe 61 is formed in a curved shape in a substantially S-shape so as to avoid the ceiling portion of the cab 5, and extends rearward and upward from a portion connected to the device main body 48A of the second exhaust gas purification device 48. Specifically, as shown in fig. 7, the exhaust pipe 61 is bent toward the lateral side of the machine body at the lower portion side. As shown in fig. 6, the upper portion near the exhaust port 62 is bent toward the rear of the housing. That is, the exhaust pipe 61 is formed with bent portions k at the lower portion and the upper portion, respectively.

As shown in fig. 13, an angular recessed portion 65 is formed in a left rear side portion of the cab 5, and the recessed portion 65 is formed by a front-rear facing surface 63 and a lateral surface 64 so as to be recessed in a stepped manner in a plan view. A reinforcing member 66 is provided on the upper side of the recessed portion 65 of the cab 5, and the reinforcing member 66 extends in an oblique direction across the front-rear facing surface 63 and the lateral surface 64. The engine cover 42 is provided so that a portion corresponding to the recessed portion 65 is opened in the vertical direction in plan view, and the exhaust pipe 61 extends upward through the opened portion of the engine cover 42 and a space formed by the recessed portion 65.

As shown in fig. 12, exhaust pipe 61 is supported at a lower portion and an upper portion by a rear side surface 68 of cab 5, which is a rear portion of cab 6, via connecting brackets 67, respectively. The connecting bracket 67 is bent into a substantially U-shape from a steel material in a band plate shape, and the bent portion is formed into an arc shape so as to extend along the outer peripheral surface of the exhaust pipe 61, and mounting portions 69 are formed at both side ends of an extended portion extending outward. The connecting bracket 67 is integrally connected to the exhaust pipe 61 in a state where the arc-shaped portion is along the outer peripheral surface of the exhaust pipe 61, and the mounting portion 69 is bolted to the rear side surface 68 of the cab 5.

Coupling bracket 67 located at a lower portion is bolted to front-rear facing surface 63 of recessed portion 65 of rear side surface 68 of cab 5. The coupling bracket 67 located at the upper portion is bolted to the support member 70 extending from the reinforcement member 66 in the inclined posture.

An upper end portion 61C1 of the exhaust pipe 61 is formed in a hexagonal cylinder shape, and a half-divided guide portion 61C2 that divides the hexagonal cylinder into halves is provided at a distal end portion where the upper end portion 61C1 is opened. The guide portion 61C2 is set to face the threshing device 8 side.

(exhaust pipe cover body)

An exhaust pipe cover 71 for covering the outside of the exhaust pipe 61 is provided from the lower portion to the upper portion of the exhaust pipe 61. As shown in fig. 7 and 12, the exhaust pipe cover 71 includes a lower cover 72 covering the outer side of the lower portion of the exhaust pipe 61 and an upper cover 73 covering the outer side of the upper portion of the exhaust pipe 61. In fig. 6, the lower cover 72 is omitted for easy understanding of the structure of the exhaust pipe 61.

As shown in fig. 14, the lower cover body 72 includes, as vertical wall portions surrounding the periphery of the exhaust pipe 61, a left vertical wall portion 72a covering the left side portion of the exhaust pipe 61 and a rear vertical wall portion 72b covering the rear side portion of the exhaust pipe 61, and further includes, as an upper cover portion for sealing a gap between the upper portions of the

vertical wall portions

72a and 72b and the outer periphery of the exhaust pipe 61, an inclined cover portion 72c which prevents dust from entering the engine compartment 43 below from the periphery of the exhaust pipe 61. The right side portion of the exhaust pipe 61 is covered by a lateral surface 64 of the cab 5, and the front side portion of the exhaust pipe 61 is covered by a front-rear facing surface 63 of the cab 5. That is, the lateral surface 64 and the front-rear facing surface 63 are formed with wall portions that surround the right and front side portions of the periphery of the exhaust pipe 61 that are not covered by the lower cover 72.

The attachment portion 72a1 at the lower end of the left vertical wall portion 72a is bolted to the upper surface of the first cover body portion 55 of the boss cover 54. Mounting portion 72b1 at the right end of rear vertical wall portion 72b is bolted to lateral surface 64 of recessed portion 65 of rear side surface 68 of cab 5. The right end portion of the inclined covering portion 72c is bolted to the lateral surface 64, and the middle portion of the inclined covering portion 72c in the lateral direction is bolted to the coupling bracket 67. The inclined covering portion 72c is divided into a left portion 72c1 covering the left side of the exhaust pipe 61 and a right portion 72c2 covering the right side of the exhaust pipe 61 so as to be easily attached from both the left and right sides of the exhaust pipe 61. The left side portion 72c1 and the right side portion 72c2 are bolted at the right side end portions.

As shown in fig. 11, 12, and 13, the upper cover 73 is formed of a plate material having a substantially U-shaped cross section so as to cover the left, rear, and right portions of the upper portion of the exhaust pipe 61. The upper cover 73 is bent in a substantially L-shape when viewed from the side so as to follow a shape bent toward the rear of the body of the exhaust pipe 61. The upper cover 73 is supported by the exhaust pipe 61. That is, the middle portion of the upper cover 73 in the vertical direction is bolted to the attached portion 74 provided on the outer peripheral portion of the exhaust pipe 71, and the upper portion of the upper cover 73 is bolted to the connecting bracket 67 located on the upper side.

(case support structure)

As shown in fig. 4, 6, and 9, a fuel tank 75 is provided at the rear end of the travel machine body 1 between the threshing device 8 and the grain tank 9. That is, between the threshing device 8 and the grain tank 9, a fuel tank 75 is provided in a space formed on the left outer side of the left inclined surface 30 of the grain tank 9. The right side of the upper part of the fuel tank 75 is set in an inclined posture along the inclined surface 30 of the grain tank 9, and a narrow space between the threshing device 8 and the grain tank 9 can be utilized widely in the vertical direction. The fuel tank 75 extends long in the front-rear direction to a position as close to the secondary product return device 26 as possible, thereby increasing the capacity.

The fuel tank 75 is supported by the body frame 4 in a state where its lower end portion enters below the upper surface 4a of the body frame 4. As shown in fig. 9 and 15, the body frame 4 is formed by connecting a plurality of front-rear direction frames 4A and a plurality of lateral frames 4B in a lattice shape. A rectangular tray-shaped, in other words, a box-shaped frame body 76 having an open top and connected to the front and rear lateral frame bodies 4B is provided at the center in the left-right direction of the rear end portion of the body frame 4. The bottom portion 76a of the plate-like frame body 76 is provided in a state recessed downward from the upper surface 4a of the body frame 4. The fuel tank 75 is supported by the plate-like frame body 76 with its lower end portion extending downward from the upper surface 4a of the body frame 4. The fuel tank 75 is held by the band 77 from above in a state of being supported by the plate-like frame body 76, thereby preventing the upward tilting. Here, the bottom portion 76a of the plate-like frame body 76 is located below the upper surface 4a of the body frame 4, but a ground height that does not contact the ground can be secured even in a paddy field.

As shown in fig. 4, 6, and 9, the urea water tank 60 is provided vertically adjacent to the fuel tank 75. Therefore, the urea water tank 60 is provided on the right side (an example of one side in the left-right direction) of the thresher 8. Further, a support frame 78 extending upward while passing through the side of the fuel tank 75 is provided. The support frame 78 includes a rear vertical frame 79, front and rear pillars 80 extending in the vertical direction on the front and rear sides of the fuel tank 75, and a platform 81 extending across the front and rear pillars 80. That is, the sides of the fuel tank 75 refer to the front and rear sides of the fuel tank 75. The urea water tank 60 is supported on a support frame 78 in a state of being positioned above the fuel tank 75.

Specifically, the mounting table 81 is formed of a rectangular plate body having a wide front-rear direction and a narrow left-right direction. Further, a front pillar 80 is provided from the body frame 4 at a position located at the center of the left-right direction of the mounting table 81 on the front side of the fuel tank 75. The upper end of the front support column 80 is bolted to the mounting table 81.

A rear pillar 80 stands from the body frame 4 on the left side of the mounting table 81 on the rear side of the fuel tank 75. The rear vertical frame 79 is positioned on the right side of the mounting table 81 on the rear side of the fuel tank 75. The rear pillar 80 and the rear vertical frame 79 are disposed so as to be distributed on the left and right sides so as to avoid the oil supply port 82 of the fuel tank 75. The rear support column 80 is positioned below the left side of the mounting table 81, and the upper end portion thereof is bolted to the lower surface of the mounting table 81. The rear vertical frame 79 is provided to extend vertically long through a right lateral portion of the table 81. The mounting table 81 is bolted to brackets 83 attached to both front and rear sides of the support column 80.

The urea water tank 60 is placed on the upper side of the mounting table 81 and is pressed by the screw 84 to prevent the dropping. Thus, the mounting table 81 on which the urea water tank 60 is mounted and supported is stably supported by the machine body frame 4 via the rear side vertical frame 79 and the 2 support columns 80.

The urea water pump 85 is electrically driven, and the urea water pump 85 delivers the urea water stored in the urea water tank 60 to a consumption site. Urea water pump 85 delivers the urea water in urea water tank 60 to injection nozzle 53 provided in exhaust gas relay unit 48B of second exhaust gas purification device 48.

The urea water tank 60 is supported on the rear side of the support frame 78, and the urea water pump 85 is supported on the front side of the support frame 78. Specifically, as shown in fig. 6, a support plate 86 in a vertical posture is provided in a fixed state on the front side of the mounting table 81, and a urea water pump 85 is attached to the support plate 86. The urea water tank 60 is placed and supported on the rear portion side of the mounting table 81.

As shown in fig. 6, the pipe 87 for connecting the urea water tank 60 and the second exhaust gas purification device 48 is provided in a state of passing along the right side wall 8A of the threshing device 8. The pipe 87 includes: a delivery pipe 88 that delivers the urea water from the urea water tank 60 to the injection nozzle 53 via the urea water pump 85; and a return pipe 89 that returns the remaining urea solution, which is not consumed by the injection nozzle 53, of the urea solution delivered by the urea water pump 85 to the urea water tank 60. The piping 87 may include, in addition to the delivery pipe 88 and the return pipe 89, other types of piping, for example, piping for supplying an antifreeze agent for preventing freezing of urea water.

As shown in fig. 6, a support member 90 for supporting the pipe 87 is provided on the right side wall 8A of the threshing device 8. The pipe 87 is provided in a state of passing along an upper portion of the right side wall 8A of the threshing device 8, and is supported by the support member 90. The piping 87 is provided in a state of passing through a high position so as to pass above the secondary product returning device 26.

As shown in fig. 16, the support member 90 includes a mounting plate 91 that is long in the front-rear direction and a pipe support portion 92 provided in the front and rear. The mounting plate 91 has coupling portions 93 at a plurality of locations spaced apart in the front-rear direction. The support member 90 has a plurality of coupling portions 93 fixed to the right side wall 8A of the threshing device 8 by bolts. The front end of the mounting plate 91 is fixed to a front side vertical frame 94 erected from the body frame 4.

The pipe 87 extending in the front-rear direction of the machine body is supported by the pipe support portion 92 as a pipe support member by a plurality of screws 95 provided at appropriate intervals. As shown in fig. 16, the pipe support portion 92 is provided at two front and rear positions, and includes a plurality of holders 96 each having a substantially triangular shape when viewed from the front-rear direction, and a support 97 for supporting the plurality of holders 96 arranged in the vertical direction. The support 97 of the pipe support portion 92 on the rear side extends upward, and forms a placement portion 98 in a horizontal posture.

The grain box 9 is provided to freely swing around the longitudinal axis Y of the rear portion as described above. The grain tank 9 has a hook-engaging lock mechanism (not shown) for holding the front side in a normal operation position (position shown in fig. 2) retracted into the machine body. As shown in fig. 6 and 16, a fixed-side engaging portion 99 that engages with the lock mechanism is provided at an upper portion of the front-side vertical frame 94. Although not shown, when the grain tank 9 is located at the normal operation position, the lock mechanism is engaged with the fixed-side engaging portion 99, and the position of the grain tank 9 can be held. The lock mechanism is capable of releasing the lock from the lateral outside. The front side vertical frame 94 has a large supporting strength to hold the grain box 9 at the normal working position.

As shown in fig. 6, the height in the vertical direction of the position where the urea water pump 85 is provided and the position where the second exhaust gas purification device 48 is provided is set to be substantially the same height. The pipe 87 is provided in a state of extending substantially linearly in the front-rear direction. The front portion of the pipe 87 is set to pass above the connection portion between the front vertical frame 94 and the threshing device 8. With the above configuration, even if the screw 95 is detached due to long-term machine body vibration, there is no problem that the pipe 87 hangs down and contacts the secondary material returning device 26.

The water supply port 82 of the fuel tank 75 is provided on the rear side of the fuel tank 75, and the water supply port 100 of the urea water tank 60 is provided on the rear side of the urea water tank 60. That is, as shown in fig. 6, the oil supply port 82 of the fuel tank 75 projects from the upper portion of the rear wall portion 75a of the fuel tank 75 in an inclined direction toward the rear upper side of the machine body. A rear downward inclined surface 60b is formed at an upper portion of the rear wall portion 60a of the urea water tank 60 in an inclined posture that is downward toward the rear side. The water supply mouth 100 projects rearward and upward in a direction orthogonal to the inclined surface 60b. The oil supply port 82 and the water supply port 100 are closed by

covers

101 and 102 that can be opened and closed manually.

At least either one of the fuel tank 75 and the urea water tank 60 has an identification mark for identifying both. Specifically, the cover 101 of the water supply port 82 is made of a black material, the cover 102 of the water supply port 100 is made of a blue material, and character information indicating the supply target (fuel, urea water) directly on the surfaces of the

covers

101 and 102 is displayed by embossing. This allows the oil supply port 82 and the water supply port 100 to be identified. That is, the color of the

covers

101 and 102 is different and the displayed character information corresponds to the identification mark.

As shown in fig. 2, 5, and 10, the rear cover 103 covers the grain tank 9, the fuel tank 75, and the urea water tank 60 from the rear side. Rear cover 103 has right cover 103A on the right side of the body and left cover 103B on the left side of the body. The right cover body 103A is formed in a substantially L-shape in plan view, is provided in a state of covering the rear and lateral sides of the right rear space of the grain tank 9, and is provided in a fixed position.

The left cover body portion 103B is supported so that the right end portion can swing about the vertical axis with respect to the right cover body portion 103A via a hinge 104 to open and close. A pair of upper and lower position holding mechanisms 105 are provided on the left side (swing end side) of the left cover part 103B, and the position holding mechanisms 105 can hold positions in a closed state and can release the held state by a manual opening operation.

Although not shown, the position holding mechanism 105 is an elastic engagement type locking mechanism having a known structure, and in the position holding mechanism 105, the position holding state can be released by engaging the engaging member with the engaged member 106 on the fixed side by an elastic force to hold the position, and manually releasing the engagement against the elastic force by the engaging member. As shown in fig. 10, an engaged member 106 on the fixing side, with which the position holding mechanism 105 is engaged, is provided on the rear side vertical frame 79.

In fig. 4 and 6, the rear cover 103 is omitted for the sake of easy understanding of the internal structure.

The injection nozzle 53 provided in the exhaust gas relay unit 48B of the second exhaust gas purification apparatus 48 is controlled by a control device, not shown, so as to change and adjust the injection amount of the urea water. That is, the exhaust gas purification apparatus includes a NOx measuring device 107 (an example of an auxiliary device of the exhaust gas purification apparatus) that measures the concentration of nitrogen oxides (NOx) contained in the exhaust gas, and the control device controls the injection nozzle 53 so that the injection amount of the urea water becomes a correct injection amount based on the measurement information of the NOx measuring device 107.

As shown in fig. 7, the NOx measuring device 107 is located in the flow path of the exhaust gas, and is configured by a detection unit 107a and a control circuit unit 107b, the detection unit 107a outputs detection information corresponding to the concentration of nitrogen oxides (NOx), and the control circuit unit 107b calculates the concentration of nitrogen oxides (NOx) based on the information from the detection unit 107 a. The detection portion 107a is provided so as to face the exhaust gas flow path of the exhaust gas relay portion 48B. Although not described in detail, the control circuit unit 107b is mounted with various electronic components on the wiring board, and is likely to malfunction when strong vibration is continuously applied. Here, the control circuit unit 107b is provided in a location where vibration is small.

That is, vertical frame 108 is provided, and vertical frame 108 is located on the body rear side of engine 44, stands from body frame 4, and supports the rear side of cab 6. A support bracket 109 is fixed to a vertically intermediate portion of the vertical frame 108, and the control circuit unit 107b is mounted on the support bracket 109.

It is also possible to support auxiliary equipment of the second exhaust gas purification device 48, which is different from the NOx measuring device 107, on the support bracket 109.

As shown in fig. 4, 6, 10, and 16, a work table 110 is provided above the pipe 87 between the threshing device 8 and the grain tank 9. The left end of the work table 110 is mounted on and supported by a support member 111 fixed to the side wall 8a of the threshing device 8, and the right end is mounted on and supported by a mounting portion 98 of the pipe support 92 bolted to the rear side. For example, when maintenance work such as cleaning the inside of the threshing device 8 is performed, the work table 110 is stepped on by a worker to perform the work.

(other embodiments)

(1) In the above-described embodiment, the second exhaust gas purification device 48 is placed and supported on the upper portion of the engine 44 on the side opposite to the side where the radiator cooling fan 46 is present, in a state of being positioned below the side panel 12 and having the longitudinal direction along the front-rear direction of the body, and various configurations described in the following (1-1) to (1-4) can be adopted instead of this configuration.

(1-1) the second exhaust gas purification apparatus 48 is supported by a separate frame on the engine 44.

(1-2) the second exhaust gas purification device 48 may also be provided on the lower side of the driver seat 10.

(1-3) the second exhaust gas purification device 48 may also be provided on the side where the radiator cooling fan 46 is present.

(1-4) the second exhaust gas purification device 48 may be placed in a posture in which the long side direction is directed in the vertical direction.

In short, the arrangement configuration may be variously modified as long as the second exhaust gas purification device 48 is located in the engine room 43.

In the above embodiment, the exhaust gas relay section 48B of the second exhaust gas purification device 48 is provided in a state of being offset to the left side portion of the housing from the lower side portion of the side panel 12, but the entire exhaust gas relay section 48B of the second exhaust gas purification device 48 may be provided below the side panel 12.

(2) In the above embodiment, the second exhaust gas purification device 48 is provided in a state where the entire second exhaust gas purification device 48 is housed in the engine room 43, but only a part of the second exhaust gas purification device 48 may be housed in the engine room 43. (3) In the above embodiment, the exhaust pipe 61 extends upward between the rear portion of the cab 6 and the front portion of the thresher 8, and the exhaust port 62 is provided in a state of opening to the thresher 8 side, and instead of this configuration, the direction of the exhaust port 62 may be changed such as opening the exhaust port 62 rearward or forward. The exhaust duct 61 may extend from the lower side of the traveling machine body 1 to the rear side of the machine body, or the exhaust duct 61 may extend rearward along a higher position between the threshing device 8 and the grain tank 9.

(4) In the above embodiment, the projecting portion cover 54 is provided to cover the upper, front, and lateral outer sides of each of the purifying device projecting portion 47t and the relay projecting portion 48Bt, and instead of this structure, the following structures (4-1) to (4-3) may be employed.

(4-1) only the first exhaust gas purification device 47 protrudes outward from the engine room 43, the exhaust relay section 48B is housed in the engine room 43, and the protruding section cover 54 covers the purification device protruding portion 47t of the first exhaust gas purification device 47.

(4-2) only the exhaust gas relay section 48B protrudes outward from the engine room 43, the first exhaust gas purification apparatus 47 is housed in the engine room 43, and the protruding section cover 54 covers the relay section protruding portion 48Bt of the exhaust gas relay section 48B.

(4-3) the first exhaust gas purification device 47 and the exhaust gas relay section 48B each protrude outward from the engine room 43, but do not have the protruding section cover 54.

(5) In the above embodiment, the

lateral side portions

55c, 56c of the projecting portion cover 54 are constituted by the perforated metal plate 57 as a porous member, but a mesh member, a lattice member, or the like may be used as the porous member. Further, instead of the structure of the porous member, the

lateral side portions

55c, 56c may be formed of a closed plate-like member.

(6) In the above embodiment, the rear sides of the purifying device projecting portion 47t and the relay projecting portion 48Bt are open respectively, but the rear sides of either or both of the purifying device projecting portion 47t and the relay projecting portion 48Bt may be covered by the projection cover 54.

(7) In the above embodiment, the protruding portion cover 54 includes the first cover portion 55 and the second cover portion 56, the second cover portion 56 protrudes outward from the first cover portion 55 to form a step in the left-right direction, and the first cover portion 55 and the second cover portion 56 are provided in a state of being arranged in the vertical direction.

(7-1) the first lid body portion 55 and the second lid body portion 56 are arranged in the up-down direction without steps.

(7-2) the lug cover 54 is not divided but integrally formed.

(8) In the above embodiment, the left end of the first exhaust gas purification device 47 protrudes from the left end of the engine room 43 to the outside of the engine room 43, and instead of this configuration, the entire first exhaust gas purification device 47 may be placed in the state of being housed in the engine room 43.

(9) In the above embodiment, the urea water tank 60 is provided at the rear end portion of the machine body, and various configurations such as providing the urea water tank 60 at the front portion of the machine body and at the intermediate portion in the front-rear direction can be adopted.

(10) In the above embodiment, the identification marks are formed by making the color of the

lid bodies

101 and 102 different and displaying character information as the identification marks for identifying both the fuel tank 75 and the urea water tank 60, but the present invention is not limited thereto, and various modifications are possible. For example, only the color of the

covers

101 and 102 may be different, or only character information may be displayed. Further, the shape, material, size, and the like of the

covers

101 and 102 may be used for distinction. Instead of embossing, only printing or labeling may be performed as character information. The character information may be provided on either one of the

covers

101 and 102 or both of them.

(11) In the above embodiment, the first exhaust gas purification device 47 is provided in the vicinity of the engine 44, but the present invention is not limited to this configuration, and the arrangement position can be appropriately changed. For example, the threshing device 8 and the grain tank 9 may be provided therebetween, or the grain tank may be provided thereunder.

(12) In the above embodiment, the bent portions k are formed at the upper portion side and the lower portion side of the exhaust pipe 61, respectively, and instead of this structure, the exhaust pipe 61 may be linearly extended over the entire range.

(13) In the above embodiment, the cab 5 covering the space above the driver seat 10 is provided in the driver's part 6, and the exhaust pipe 61 is supported at the rear part of the cab 5, but instead of this configuration, the driver's part 6 may be provided with no cab, and the exhaust pipe 61 may be supported by, for example, a support member for supporting the driver seat 10 of the driver's part 6.

(14) In the above embodiment, the lower cover 72 covering the lower portion of the exhaust pipe 61 has the left-side vertical wall portion 72a and the rear-side vertical wall portion 72b as vertical wall portions surrounding the periphery of the exhaust pipe 61, the left-side vertical wall portion 72a covering the left-side portion of the exhaust pipe 61, and the rear-side vertical wall portion 72b covering the rear-side portion of the exhaust pipe 61, but the lower cover 72 may have vertical wall portions covering each of the front-side portion, the rear-side portion, the right-side portion, and the left-side portion of the exhaust pipe 61, that is, covering the entire outer periphery of the exhaust pipe 61.

(15) In the above embodiment, the exhaust pipe cover body 71 that covers the outside of the exhaust pipe 61 from the lower portion to the upper portion of the exhaust pipe 61 includes the lower cover body 72 and the upper cover body 73, and instead of this configuration, only one of the lower cover body 72 and the upper cover body 73 may be provided as the exhaust pipe cover body 71, and the shape of the exhaust pipe cover body 71 may be variously modified instead of the shape disclosed in the above embodiment, and the exhaust pipe cover body 71 may not be provided.

(16) In the above embodiment, the exhaust duct 61 is extended above the grain raising device 25 on the front side of the grain raising device 25, and the exhaust port 62 at the upper end portion is opened above the grain raising device 25 toward the threshing device 8, but instead of this configuration, the exhaust port 62 may be opened rearward, forward, or the like, and the orientation of the exhaust port 62 may be changed. The exhaust duct 61 may extend from the lower side of the traveling machine body 1 to the rear side of the machine body, or may extend rearward along a higher position between the threshing device 8 and the grain tank 9.

(17) In the above embodiment, the fuel tank 75 is supported by the body frame 4 and the urea water tank 60 is provided above the fuel tank 75 between the thresher 8 and the grain tank 9, but instead of this configuration, the urea water tank 60 and the fuel tank 75 may be provided in a state of being supported by the body frame 4 and arranged in the lateral direction or the front-rear direction. The fuel tank 75 may be provided not between the threshing device 8 and the grain tank 9 but below the threshing device 8, below the grain tank 9, or across the threshing device 8 and the grain tank 9.

(18) In the above embodiment, the urea water tank 60 is supported on the rear side of the support frame 78, and the urea water pump 85 is supported on the front side of the support frame 78, but instead of this configuration, the urea water tank 60 may be positioned on the front side, and the urea water pump 85 may be supported on the rear side.

(19) In the above embodiment, the engine 44 and the second exhaust gas purification device 48 are provided at the front portion of the traveling machine body 1, and the fuel tank 75 and the urea water tank 60 are provided at the rear portion of the traveling machine body 1, but the positions of installation of the respective devices are not limited to the above configuration as long as the fuel tank 75 and the urea water tank 60 are provided at adjacent positions. (20) In the above embodiment, the oil supply port 82 projects from the rear wall portion 75a of the fuel tank 75 in the direction inclined toward the rear upper side of the machine body, but instead of this configuration, the oil supply port 82 may project in a horizontal posture toward the rear of the machine body.

As a configuration for reducing the weight burden of the oil feeding operation, as shown in fig. 17, a replenishment container table 201 capable of placing and supporting a replenishment container 200 may be provided on the support column 80 on the rear side of the support frame 78, the replenishment container 200 storing the urea water for replenishment to the urea water tank 60.

The refill container table 201 is not limited to the one fixedly attached to the support frame 78, and may be detachably supported, or may be supported so as to be capable of being switched between an operating posture in which it protrudes rearward and a retracted posture in which it is retracted inward of the machine body.

(21) In the above embodiment, the aqueous urea tank 60 is provided at the rear end portion of the traveling machine body 1, but instead of this configuration, the aqueous urea tank 60 may be provided slightly forward of the rear end portion of the traveling machine body 1.

(22) In the above embodiment, the urea water tank 60 is provided on the right side of the threshing device 8, but may be provided on the rear side of the threshing device 8 or the rear side of the grain tank 9.

(23) In the above embodiment, the pipe 87 connecting the urea water tank 60 and the exhaust gas purification device 48 is provided along the upper portion of the right side wall 8a of the threshing device 8, and instead of this configuration, the pipe 87 may be provided along the lower portion of the side wall 8a, or the pipe 87 may be provided along the upper portion of the machine frame 4.

(availability in industry)

The invention can be used for various harvesters such as a common combine harvester, a semi-feeding combine harvester, a corn harvester, a carrot harvester, a radish harvester and the like.

Claims

1. A harvester is characterized in that the harvester is provided with a harvester body,

the traveling machine body includes: an engine; a fuel tank storing fuel supplied to the engine; an exhaust gas purification device provided above the engine and configured to reduce nitrogen oxides contained in exhaust gas from the engine; and a urea water tank storing urea water for supply to the exhaust gas purification apparatus,

the running machine body is provided with a threshing device and a grain box in a state of being arranged along the left and right directions, the threshing device is used for threshing the harvested crops, the grain box is used for storing grains,

the urea water tank and the fuel tank are provided between the threshing device and the grain tank in a state where the urea water tank is adjacent to the fuel tank on the upper side,

the exhaust gas purification device and the urea water tank are overlapped with each other in the vertical direction and in the horizontal direction.

2. A harvester is characterized in that a harvester is provided,

the pipe connecting the urea water tank and the exhaust gas purification device extends in the front-rear direction along the side wall of the threshing device on the grain tank side, and is supported by the side wall of the threshing device on the grain tank side.

3. A harvester according to claim 1 or 2,

the fuel tank is supported on the machine body frame,

the urea water tank is disposed above the fuel tank.

4. A harvester according to claim 3,

the fuel tank is supported by the body frame in a state that a lower end portion of the fuel tank enters a lower side of an upper surface of the body frame.

5. A harvester according to claim 3 or 4,

having a support frame supporting the urea water tank,

the support frame extends upward from the body frame in a state of passing through a side of the fuel tank.

6. A harvester according to claim 1 or 2,

the fuel tank is supported on the machine body frame,

having a support frame supporting the urea water tank,

the support frame extends upward from the body frame in a state of passing through a side of the fuel tank,

7. The harvester of claim 5 or 6,

having a pump that delivers the urea water stored in the urea water tank to a consumption site,

the urea water tank is supported by a rear portion of the support frame, the pump is supported by a front portion of the support frame,

the exhaust gas purification device is provided on the front side of the pump.

8. The harvester of any one of claims 5 to 7,

the support frame has: a plurality of pillars extending in an up-down direction at front and rear sides of the fuel tank, respectively; and a mounting table spanning upper portions of the plurality of support columns.

9. A harvester according to claim 8,

the support frame is provided with a replenishment container table on which a replenishment container storing urea water to be replenished to the urea water tank can be placed and supported.

10. A harvester according to any one of claims 1 to 9,

a harvesting part for harvesting crops along with the running of the machine body is arranged at the front side of the running machine body,

the fuel tank and the urea water tank are disposed at a rear end portion of the travel machine body.

11. A harvester according to claim 10,

having a rear cover covering the fuel tank and the urea water tank from the rear side,

the rear cover is capable of changing a posture between an operating state covering a fuel supply port of the fuel tank and a water supply port of the urea water tank and a non-operating state allowing the fuel supply port of the fuel tank and the water supply port of the urea water tank to be opened to the rear side.

12. A harvester according to claim 10 or 11,

the oil supply port of the fuel tank is disposed at a rear side of the fuel tank,

13. A harvester according to claim 12,

the oil supply port protrudes from the rear wall portion of the fuel tank to the rear of the engine body.

14. A harvester according to claim 12 or 13,

at least one of the fuel tank and the urea water tank has an identification mark for identifying both.

15. A harvester according to any one of claims 1 to 14,

the running machine body is provided with a threshing device and a grain box which are arranged along the left and right directions, the threshing device is used for threshing the harvested crops,

the urea water tank is arranged at the rear part of the running machine body,

16. The harvester of claim 15,

has a winnowing device which is positioned between the threshing device and the grain box and carries the grain recovered at the lower part of the threshing device to the upper part of the grain box,

the pipe passes through the threshing device and the winnowing device.

17. A harvester according to claim 15 or 16,

a secondary material returning device which is positioned between the threshing device and the grain box and returns the secondary material recovered at the lower part of the threshing device to the front part of the threshing device,

the piping passes above the secondary product returning device.

18. A harvester according to any one of claims 15 to 17,

an operation platform is arranged above the pipe between the threshing device and the grain box.

19. A harvester according to claim 18,

a piping support member for supporting the piping,

the work table is supported by the pipe support member.