CN109964623B - Combine harvester - Google Patents

Abstract

The invention discloses a combine harvester which is provided with a driving part positioned at the front part of a machine body, an engine (7) positioned below the driving part and an exhaust pipe (66) for circulating exhaust from the engine (7). The exhaust pipe (66) is in a state that the position of an exhaust port (68) for exhausting the exhaust gas to the outside is higher than that of a supply port (69) for supplying the exhaust gas from the engine (7).

Description

Combine harvester

This application is a divisional application of the following applications:

the invention name is as follows: combine harvester

The date of international application: year 2014, 12 months and 01 days

International application No.: PCT/JP2014/081680

National application number: 201480066487.1

Technical Field

The invention relates to a combine harvester.

Background

(1) In a conventional combine harvester, a driver is provided at a right lateral side of a front portion of a body, an engine is provided below the driver, an exhaust pipe for guiding exhaust gas discharged from the engine, i.e., combustion exhaust gas, flows and extends downward from a supply port through which exhaust gas is supplied from a discharge pipe of a muffler, and extends to a rear portion of the body through a lower portion of a lower side of a body frame, and an exhaust port is formed at a rear end portion (for example, refer to a normal-type combine harvester of patent document 1)

(2) In a conventional combine harvester, in order to perform maintenance work such as cleaning or maintenance and inspection of the inside of a threshing device, a structure is adopted in which a top plate of the threshing device can be swung open, an open space is formed between the threshing device and a grain storage unit, and a conveying device for conveying a threshing object such as grain or secondary objects is provided (for example, see patent document 2).

In the case of performing such maintenance work, for example, the grain storage unit is moved laterally outward to open a space between the threshing device and the grain storage unit so that an operator can enter the space, and a top plate located at a high position is opened from the lateral side of the threshing device by using a separately prepared work table or the like as a step table to perform the work.

(Prior art documents)

(patent document)

Patent document 1: japanese laid-open patent publication No. 2011-062121 (JP 2011-062121A)

Patent document 2: japanese laid-open patent publication No. 2010-220563 (JP 2010-220563A)

Disclosure of Invention

(problems to be solved by the invention)

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

In the above-described conventional structure, the exhaust port is formed at a lower position of the lower portion of the body, and the high-temperature exhaust gas discharged from the exhaust port is accumulated in a narrow space of the lower portion of the body to accumulate heat, which may cause the exhaust pipe to easily become high-temperature. Further, since the exhaust port is located at a low position, soil splashed by the traveling device may enter the exhaust port or waste straw chips may be splashed and accumulated along with the harvesting work, and when such things occur repeatedly, there are disadvantages that the exhaust port is blocked and the exhaust gas cannot be discharged satisfactorily, or the exhaust pipe has a high possibility of becoming a high temperature.

Therefore, it is desired to improve the cooling performance of the exhaust pipe for guiding the exhaust gas discharged from the engine.

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

In the above-described conventional structure, when performing the maintenance work as described above, it is necessary to open the top plate located at a high position and insert a hand into the threshing device from a high position on the upper side of the side wall of the threshing device to perform the work. Further, when a separately prepared work table or the like is used as a stepping table to perform work, the work must be performed in an unstable posture with the feet being unstable, and the work is difficult to perform.

Therefore, it is desired to easily perform maintenance work of such a threshing device in a stable posture.

(means for solving the problems)

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

The combine harvester of the invention is characterized in that the combine harvester is provided with: a driving part located at the front part of the machine body; an engine located below the driver section; and an exhaust pipe through which exhaust gas from the engine flows, the exhaust pipe being in a state in which an exhaust port for discharging the exhaust gas to the outside is located higher than a supply port for supplying the exhaust gas from the engine.

With this configuration, the exhaust gas from the engine is supplied from the supply port of the exhaust pipe, flows through the exhaust pipe, and is then discharged to the outside from the exhaust port located at a position higher than the supply port. That is, since the exhaust gas is discharged from the exhaust port located at a high position, there is no disadvantage such as the exhaust gas staying in a narrow space at the rear part of the machine body and accumulating heat, and the exhaust gas can be discharged from the high position of the machine body to the outside and efficiently diffused into the atmosphere. In addition, because the exhaust port is located at a higher position, the hidden troubles that soil, waste straw chips and the like splash, enter the exhaust port to block the exhaust port and the like do not exist, and the exhaust state can be maintained well.

Therefore, the cooling performance of the exhaust pipe for guiding the exhaust gas discharged from the engine to flow can be improved.

In a preferred embodiment, the threshing device is disposed behind the driving unit and is configured to thresh the harvested crops, the grain storage unit stores grains obtained by the threshing process, and the exhaust pipe extends upward through a space between the threshing device and the grain storage unit.

With this structure, the exhaust pipe extends upward through the space between the threshing device, which is the main large-sized device in the combine, and the grain storage unit. Since the exhaust duct is provided in the portion sandwiched between the left and right sides by the large-sized device in this manner, the possibility that the standing straw, the operator, or the like will contact the exhaust duct from the outside of the lateral side of the body of the combine harvester is low, and further, since the exhaust duct extends upward, the exhaust gas can be discharged satisfactorily in a state in which the waste straw chips or the like discharged from the threshing device fall toward the exhaust duct from the upper side or the soil splashed with the harvesting operation enters the exhaust duct or the like.

In a preferred embodiment, the exhaust duct passes between the steering unit and the threshing device when viewed from the front of the body.

With this configuration, the exhaust gas discharged from the engine disposed at a lower position below the cab is guided to flow through the exhaust pipe between the cab and the threshing device when viewed from the front of the machine body. Therefore, the exhaust pipe can be disposed in a state of extending upward from a lower position below the cab so that the exhaust port is located at a higher position by effectively utilizing the region located between the cab and the threshing device when viewed from the front.

In a preferred embodiment, the exhaust pipe extends to the rear side of the machine body.

With this structure, since the exhaust pipe extends to the rear side of the body, the exhaust port is provided at the rear side of the body and at a higher position. As a result, the exhaust gas of the engine can be discharged in a state of being discharged to the outside of the upper portion, and the exhaust gas can be easily dissipated into the atmosphere without a disadvantage such as the exhaust gas staying in a small space in the lower portion of the machine body and accumulating heat.

In a preferred embodiment, the exhaust duct extends to a position behind a rear end of the threshing device.

With this configuration, the exhaust pipe extends from the lower portion of the cab to a position further to the rear side than the rear end portion of the threshing device, and therefore the exhaust gas from the engine flows through the path of the long exhaust pipe. As a result, the exhaust gas can be discharged in a state where the exhaust gas temperature is reduced as much as possible as the exhaust gas flows through a long path.

Further, since the exhaust pipe extends to a position closer to the rear side than the rear end portion of the threshing device, the possibility of exhaust gas being discharged toward the side wall of the threshing device is reduced, and unnecessary temperature rise of the threshing device is easily avoided.

In a preferred embodiment, the exhaust duct extends to a position behind a rear end portion of the grain storage portion.

With this configuration, the exhaust pipe extends from the lower portion of the cab to a position further to the rear side than the rear end portion of the grain storage unit, and therefore the exhaust gas from the engine flows through the path of the long exhaust pipe. As a result, the exhaust gas can be discharged in a state where the exhaust gas temperature is reduced as much as possible as the exhaust gas flows through a long path.

Further, since the exhaust pipe extends to a position closer to the rear side than the rear end portion of the grain storage portion, the possibility of exhaust gas being discharged toward the side wall of the grain storage portion is reduced, and unnecessary temperature rise of the grain storage portion is easily avoided.

As a preferred embodiment, the rear end portion of the exhaust pipe is bent or curved upward.

With this configuration, since the rear end portion of the exhaust pipe is bent or curved upward, the exhaust gas of the engine discharged outward from the exhaust port is discharged to a high position toward the upper outer side on the rear side of the engine body. As a result, even if an operator who performs auxiliary work such as maintenance work and maintenance inspection is located on the rear side of the machine body, there is little possibility that exhaust gas from the engine will blow on the operator.

Therefore, when the assist operation is performed from the rear side of the body, the operation can be performed satisfactorily without being adversely affected by the exhaust gas of the engine.

In a preferred embodiment, a fuel tank is provided below the rear end portion of the exhaust pipe.

With this configuration, the fuel tank can be disposed by effectively utilizing the space below the exhaust pipe. Further, in the case of refueling the fuel tank, the worker needs to perform the operation while looking into the tank from a high position above the fuel tank, but as described above, the rear end portion of the exhaust pipe is bent or curved upward, so that it is easy to avoid the exhaust gas of the engine from blowing on the worker who is performing the refueling.

In a preferred embodiment, a rear end portion of the exhaust pipe is bent or curved toward the grain storage portion.

With this structure, the rear end of the exhaust pipe is bent or curved upward, and is also bent or curved toward the grain storage portion, i.e., toward the side away from the threshing device.

As a result, since the rear end portion of the exhaust pipe is bent or curved upward and in a direction away from the threshing device, the work is easy when the top plate is opened for the removal work of straw chips in the threshing chamber of the threshing device or the like.

In a preferred embodiment, a rear end of the grain storage portion is located forward of a rear end of the threshing device, and a portion of the exhaust pipe that is located rearward of the bent portion or the curved portion passes behind the grain storage portion and passes through a space on a side of the threshing device on the grain storage portion side.

With this configuration, since a space is formed at the rear of the grain storage portion and at a side portion of the threshing device on the grain storage portion side, the space is effectively utilized, and a rear portion of the air supply/exhaust pipe closer to the rear side than the bent portion or the curved portion passes through.

With this configuration, for example, the exhaust pipe can be separated from the threshing device without causing the front-rear dimension of the machine body to increase due to the exhaust pipe projecting more rearward and outward than the rear end portion of the threshing device.

As a preferred embodiment, there is a discharger which discharges grains stored in the grain storage part to the outside, the discharger having: a longitudinal screw conveyor located behind the grain storage unit and conveying grains upward; a lateral screw conveyor that conveys the sheet from a terminal end portion of the longitudinal screw conveyor to a lateral direction; and the connecting part is connected with the longitudinal screw conveyor and the transverse screw conveyor, and the rear end part of the exhaust pipe is positioned below the connecting part.

Through this structure, the tripper will be saved in the corn of corn storage portion and carry to the top back through vertical auger delivery, through horizontal auger delivery to horizontal transport, discharge to the organism outside from the discharge port of its terminal part. In order to change the discharge position, such a discharger is configured to be rotatable around the vertical axis of the vertical screw conveyor.

Further, since the rear end portion of the exhaust pipe is located below the connecting portion connecting the vertical screw conveyor and the horizontal screw conveyor, the discharger can be operated to rotate without interfering with the exhaust pipe.

In a preferred embodiment, the entire exhaust pipe is located higher than the supply port.

With this configuration, since the entire exhaust pipe is located higher than the supply port, there is no risk of exhaust gas staying at a position lower than the supply port in the middle of the exhaust gas flow path of the exhaust pipe, and the exhaust gas can be circulated well.

Further, although there are large components such as a body frame for supporting the body at a low position of the body lower portion, for example, in the case where the exhaust pipe is disposed in a state of passing through the low position of the body lower portion, there is a possibility that the body frame and other components are structurally restricted in order to dispose the exhaust pipe.

However, with the above configuration, since the exhaust pipe is disposed in a state of passing through the upper side portion of the body higher than the supply port, the exhaust pipe can be disposed in a state in which the body frame and other components located at a lower position in the lower portion of the body are not structurally restricted.

In a preferred embodiment, the entire exhaust duct is located at a position lower than an upper end portion of the threshing device.

With this configuration, since the entire exhaust pipe is located at a position lower than the upper end portion of the threshing device, the exhaust pipe does not protrude upward beyond the upper end portion of the threshing device, and therefore, in the process of, for example, harvesting work or traveling, foreign matter such as stalk chips floating on the upper side of the machine body is less likely to fall onto the exhaust pipe and accumulate thereon.

In a preferred embodiment, the whole exhaust pipe is located at a position lower than an upper end of the grain storage unit.

Through this structure, because the whole position that is located lower than the upper end of corn storage portion of blast pipe, consequently the blast pipe can not be more upwards protruding than the upper end of corn storage portion, for example when carrying out the operation of reaping, remove the in-process of traveling, the foreign matter such as the stalk bits that float in organism top side falls on the blast pipe and accumulational possibility is little.

In a preferred embodiment, the exhaust pipe has a horizontally extending portion extending in a horizontal direction.

With this configuration, when the high-temperature exhaust gas flowing through the inside of the exhaust pipe is about to rise, the high-temperature exhaust gas flows through the horizontally extending portion, and flows while being in contact with the exhaust pipe to dissipate heat, thereby reducing the temperature of the exhaust gas as much as possible.

In a preferred embodiment, the exhaust pipe has a bent portion at a middle portion of a pipe from the supply port to the exhaust port.

With this configuration, since the exhaust pipe has the bent portion formed at the middle portion of the duct, for example, the exhaust gas flowing direction through the front portion of the exhaust pipe to which the exhaust gas from the engine located at the front portion of the engine body is supplied can be made different from the exhaust gas flowing direction through the rear portion of the exhaust pipe passing through the bent portion, and the piping structure can be designed appropriately so as to improve the cooling performance.

In a preferred embodiment, the supply port is located closer to the grain storage portion than other portions of the exhaust pipe except the supply port, the bent portion is located in front of the grain storage portion, and a spacer member is provided between the bent portion and the grain storage portion.

As a preferred embodiment, the spacer member has: a transverse spacing part which extends along the front wall of the grain storage part towards the left and right direction; and a front-rear direction spacer portion extending in the front-rear direction along the side wall of the threshing device.

In a preferred embodiment, the grain storage unit is a grain tank supported by the body frame so as to be swingable about an upper and lower axial center between an operating posture in which the grain storage unit is retracted inward of the body to store grains and a maintenance posture in which the grain storage unit is extended outward of the body, and the combine harvester includes: a support for the storage part, which is vertically arranged on the machine body frame; a position holding mechanism which is provided across between the storage part support and the grain storage part and can hold the position of the grain storage part in the action posture; and a panel support column that is erected on the body frame and supports an operation panel of a driver, wherein the lateral partition portion is supported by the panel support column, and the front-rear direction partition portion is supported by the storage portion support column.

In a preferred embodiment, the threshing device includes a processed object conveying portion located laterally outside a side wall of the threshing device and conveying upward the threshed processed object discharged outside from the threshing device, and the exhaust duct is in a state where the bent portion is located at a position closer to a front side of the machine body than the processed object conveying portion.

With this configuration, the processed material conveying section for conveying the threshed processed material upward is located laterally outside the side wall, i.e., between the threshing device and the grain storage section. The threshed product includes grains obtained by the threshing process and secondary products such as branched grains. The exhaust pipe extends from the engine located at a lower position in the front portion of the engine body toward the rear side of the engine body via a bent portion in the middle of the path. That is, since the bent portion is located closer to the front side of the machine body than the processed object conveying portion, the space between the threshing device and the grain storage portion can be effectively used by disposing the rear side portion of the exhaust pipe passing through the bent portion so as not to interfere with the processed object conveying portion.

In a preferred embodiment, the grain threshing apparatus further comprises a grain winnowing device which is located laterally outside the side wall of the threshing device, conveys the grain discharged from the outside of the threshing device upward toward the upper inlet of the grain storage part, and the exhaust pipe passes through a space between the grain winnowing device and the threshing device.

Through this structure, the horizontal outside side at thresher's lateral wall possesses the grain delivery mechanism that raises and delivers, and the grain delivery mechanism will be carried upwards and supplied with to the inside of grain storage unit through the upper portion entry from thresher discharge outside grain. In addition, the exhaust pipe can be arranged in the space formed between the grain winnowing device and the threshing device.

In a preferred embodiment, the threshing device further includes a secondary material returning device which is located laterally outside the side wall of the threshing device and conveys the secondary material discharged from the outside of the threshing device upward toward the secondary material inlet of the threshing device, and the exhaust pipe passes above the secondary material returning device.

With this configuration, the secondary material returning device is provided on the lateral outer side of the side wall of the threshing device, and the secondary material returning device conveys the secondary material discharged from the outside of the threshing device upward and returns the secondary material to the inside of the threshing device through the secondary material inlet. In addition, the exhaust pipe can be arranged in the space formed above the secondary return device between the grain winnowing device and the threshing device.

As a preferred embodiment, the method comprises the following steps: a grain delivery device which is positioned on the lateral outer side of the side wall of the threshing device and conveys the grains discharged from the outer side of the threshing device upwards to the upper inlet of the grain storage part; and a secondary object returning device which is positioned at the lateral outer side of the side wall of the threshing device, conveys the secondary objects discharged from the outer side of the threshing device upwards to the secondary object feeding port of the threshing device, and the grain winnowing device and the secondary object returning device are crossed when viewed from the side surface of the machine body.

Through this structure, the horizontal outside side at thresher's lateral wall possesses the grain delivery mechanism that raises and delivers, and the grain delivery mechanism will be carried upwards and supplied with to the inside of grain storage unit through the upper portion entry from thresher discharge outside grain. The threshing device further includes a secondary material returning device provided laterally outside the side wall of the threshing device, and the secondary material returning device conveys the secondary material discharged from the outside of the threshing device upward and returns the secondary material to the inside of the threshing device through the secondary material inlet.

Further, since the grain storage part is a large-sized member and the upper inlet of the grain storage part can be formed at any position, it is preferable to convey the grains directly upward in order to improve the conveying efficiency. On the other hand, in the threshing process, it is preferable to return the secondary objects returned by the secondary object return means to a position as close to the starting end side in the conveying direction of the processed objects as possible in the threshing device.

Therefore, when the grain delivery device is disposed in a substantially upright posture, the secondary object inlet is formed at a position offset from the position where the grains are collected toward the starting end side in the treatment object transfer direction, and the secondary object return device is disposed in a tilted posture in a tilted state, the grain delivery device and the secondary object return device are disposed so as to intersect each other when viewed from the side of the body.

Therefore, with this configuration, the grain conveying efficiency can be improved and the threshing process can be performed satisfactorily by disposing the grain winnowing device and the secondary material returning device in a crossing state when viewed from the side of the body.

As a preferred embodiment, the method comprises the following steps: a grain delivery device which is positioned on the lateral outer side of the side wall of the threshing device and conveys the grains discharged from the outer side of the threshing device upwards to the upper inlet of the grain storage part; and a connecting member for connecting an upper side portion of the grain winnowing device and the threshing device, wherein the exhaust pipe is supported by the connecting member.

Through this structure, the horizontal outside side at thresher's lateral wall possesses the grain delivery mechanism that raises and delivers, and the grain delivery mechanism will be carried upwards and supplied with to the inside of grain storage unit through the upper portion entry from thresher discharge outside grain.

The grain-raising device is supported by the threshing device through a connection member at the upper side part thereof. Therefore, even if the grain storage part is provided in a mode of freely changing the posture, and the state that the upper side part of the grain delivery device is connected with the grain storage part and the state that the upper side part of the grain delivery device is separated from the grain storage part are switched, the position relation between the upper inlet of the grain storage part and the grain delivery device can be maintained in a good position relation that the grain is easily conveyed.

The exhaust pipe is supported by the coupling member. That is, by effectively using the coupling member for coupling and supporting the upper part side part of the grain winnowing device to the threshing device, the exhaust pipe can be supported without complicating the support structure.

In a preferred embodiment, the grain storage unit is a grain tank supported by the body frame so as to be swingable about an upper and lower axial center between an operating posture in which the grain storage unit is retracted inward of the body to store grains and a maintenance posture in which the grain storage unit is extended outward of the body, and the combine harvester includes: a support for the storage part, which is vertically arranged on the machine body frame; and a position holding mechanism provided across between the storage section stay and the grain storage section, and capable of holding the position of the grain storage section in the action posture, wherein the exhaust pipe is supported by the storage section stay.

With this configuration, the grain storage unit is supported by the body frame so as to be freely swingable about the vertical axis between the working posture and the maintenance posture, and the position is held in the working posture by the support column provided upright on the body frame and the position holding mechanism.

The exhaust pipe is supported by the strut. That is, by effectively using the support column for supporting the position holding mechanism to the body frame, the exhaust pipe can be supported without complicating the support structure.

In a preferred embodiment, the grain storage unit is a grain tank supported by the body frame so as to be swingable about an upper and lower axial center between an operating posture in which the grain storage unit is retracted inward of the body to store grains and a maintenance posture in which the grain storage unit is extended outward of the body, and the combine harvester includes: a rear support column which is vertically arranged at the rear part of the machine body frame and supports the grain storage part in a free rotation mode; and a connecting member that connects the rear stay and the threshing device, wherein the exhaust pipe is supported by the connecting member.

With this configuration, the grain storage unit is supported by the rear support provided upright at the rear of the body frame so as to swing freely between the working posture and the maintenance posture about the vertical axis. In addition, the rear support and the threshing device are connected by the connecting component, and the rear support vertically arranged on the machine body frame is strengthened.

The exhaust pipe is supported by the coupling member. That is, by effectively using the coupling member for reinforcing the rear stay for supporting the grain storage portion in a freely swingable manner, the exhaust pipe can be supported without complicating the support structure.

In a preferred embodiment, the exhaust pipe includes a cover member that covers an outside of the grain storage portion of the exhaust pipe.

With this configuration, since the outside of the grain storage portion of the exhaust pipe is covered by the cover member, even when a configuration is adopted in which the posture can be changed between an operation posture in which the grain storage portion is retracted into the body to store grains and a maintenance posture in which the grain storage portion is extended to the outside of the body, for example, when the posture is switched to the maintenance posture, the operator is unlikely to approach the exhaust pipe or the like, and thus a good operation can be easily performed.

In a preferred embodiment, the lower portion of the cover member is formed with an inclined surface that is inclined toward the threshing device as the lower end side approaches.

With this configuration, the lower portion of the cover member is an inclined surface that is inclined toward the threshing device as the lower end side approaches, and therefore the outer side of the lower region of the exhaust pipe is covered by the lower portion of the cover member. Even if the waste straw chips and the like are scattered to the upper part of the cover member, the waste straw chips and the like are guided downward along the inclined surface, and are prevented from accumulating at a part of the upper part of the cover member close to the exhaust pipe. (2) The solution corresponding to "problem 2" is as follows.

The combine harvester of the present invention is characterized in that the combine harvester is provided with a threshing device and a grain storage part in a state of being arranged along the width direction of the machine body, the threshing device threshes the harvested crops, the grain storage part stores grains obtained through the threshing, and a workbench is arranged between the threshing device and the grain storage part.

With this structure, the operation table is provided in a state of being fixed to the machine body between the threshing device and the grain storage unit. When performing maintenance work such as cleaning and maintenance work in the threshing device, an operator can perform work in a stable posture by using the work table.

For example, when the top plate is opened and a worker performs work by inserting a hand into the threshing device from a high position on the upper side of the side wall of the threshing device, the worker can perform work in a stable posture with the feet stably supported on the work table.

Therefore, according to the present invention, maintenance work of the threshing device can be easily performed in a stable posture.

In a preferred embodiment, the work table extends rearward from a position corresponding to a front end of the threshing device.

With this configuration, since the work table is provided from the front end of the threshing device toward the rear, maintenance work can be performed favorably on at least the front side portion of the threshing device.

In addition, in the case of the combine harvester, when performing harvesting work, the harvested grain stalks are supplied from the harvesting unit disposed in the front portion of the machine body to the front end portion of the threshing device, and a large number of harvested grain stalks are threshed in the threshing device at the front end portion side. As a result, the front end portion of the threshing device is subjected to a large burden as the threshing process proceeds, and is likely to be damaged, and maintenance work is required.

Therefore, by providing such a work table, maintenance work can be performed favorably on the front end side portion of the threshing device which is highly likely to require maintenance work.

In a preferred embodiment, the work table extends rearward from a position forward of the threshing device.

With this configuration, since the work table is provided rearward from a position closer to the front side than the threshing device, at least the position on the front end side of the threshing device can be maintained satisfactorily.

In addition, in the case of a combine harvester, when performing harvesting work, harvested grain stalks are supplied from a harvesting unit provided in the front part of the body to the front end part of the threshing device, and a large number of harvested grain stalks are threshed in the front end part side part of the threshing device. As a result, the front end portion of the threshing device is subjected to a large burden as the threshing process proceeds, and is likely to be damaged, and maintenance work is required.

Therefore, by providing such a work table, maintenance work can be performed favorably on the front part side portion of the threshing device which is likely to require maintenance work.

In a preferred embodiment, the work table extends to a rear end of the threshing device.

With this configuration, since the work table extends to the rear end of the threshing device, when an operator steps on the work table to perform maintenance work inside the threshing device, the operator can perform the work satisfactorily regardless of the position in the front-rear direction of the threshing device.

In a preferred embodiment, the work table extends in the front-rear direction of the machine body along the side wall of the threshing device.

With this configuration, since the work table extends in the front-rear direction of the machine body along the side wall of the threshing device, the work table is in a state close to the threshing device regardless of the position in the front-rear direction of the threshing device, and therefore, when an operator steps on the work table to perform work, the operator can easily perform work in a state close to the work target position.

In a preferred embodiment, a top plate covering an upper portion of a threshing chamber of the threshing device is supported so as to be swingable about a swing fulcrum along a front-rear direction of a machine body between a closed state covering an upper portion of the threshing chamber and an open state opening the upper portion of the threshing chamber, and the work table is provided at a lateral side portion of the threshing device on a side opposite to a side where the swing fulcrum is located.

With this configuration, when the top plate is switched to the open state, the upper part of the threshing chamber is opened to a large extent, and therefore, maintenance work inside the threshing chamber is facilitated. After the maintenance work is finished, the top plate is switched to the closed state, so that the threshing work can be performed well.

Further, since the work table is provided at a lateral side portion of the threshing device opposite to the side where the swing fulcrum is located, the operator who gets on the work table is located at the swing end side of the top plate, and can easily open and close the swing end side portion of the top plate by holding it with a hand.

In a preferred embodiment, the threshing device has an upward top plate supporting surface that supports the top plate in a blocking manner in the closed state, and the work table and the top plate supporting surface are set to have the same or substantially the same height.

With this configuration, when the top plate is switched to the closed state, the swing end portion of the top plate is supported by the top plate support surface. When the worker on the work table grips the top plate and switches the top plate to the open state, the swing end side portion of the top plate is separated from the top plate support surface accompanying the swing of the top plate, and the upper portion of the threshing chamber is opened.

Since the work table and the ceiling supporting surface are set to the same or substantially the same height, the operator who gets on the work table can use the ceiling supporting surface opened upward as a part of the work table, and the work can be performed more easily.

In a preferred embodiment, the work table is supported by the threshing device.

With this configuration, since the work table is supported by the threshing device, the threshing device can be used as a support frame as well, and a complicated support structure such as a special frame member for supporting the work table does not need to be provided separately, and the work table can be supported by a simple structure.

In a preferred embodiment, a top plate covering an upper portion of a threshing chamber of the threshing device is supported so as to be swingable about a swing fulcrum along a front-rear direction of a machine body between a closed state covering an upper portion of the threshing chamber and an open state opening the upper portion of the threshing chamber, the threshing device has an upward top plate supporting surface that blocks and supports the top plate in the closed state, and a portion of the work table located on the threshing device side is placed and supported on the top plate supporting surface.

With this configuration, when the top plate is switched to the closed state, the swing end side portion of the top plate is supported by the top plate supporting surface in a blocking manner, and the portion of the work table on the threshing device side is supported by the top plate supporting surface in a mounted manner.

That is, the work table can be supported by effectively using the top plate supporting surface for blocking and supporting the top plate, and a dedicated frame member for supporting a portion of the work table on the threshing device side is not required, and the structure can be simplified.

In a preferred embodiment, the grain storage device further includes a frame body that supports a portion of the work table located on the grain storage portion side.

With this configuration, the part of the work table located on the grain storage portion side is supported by the frame body. The part of the work table on the threshing device side can be supported by the threshing device, and the part of the work table on the grain storage side is supported by the frame body, so that the work table can be stably supported.

In a preferred embodiment, the grain storage unit is a grain tank supported by a body frame so as to be swingable about an upper and lower axial center between an operating posture in which the grain storage unit is retracted into the body to store grains and a maintenance posture in which the grain storage unit is extended outward from the body, and the combine harvester includes: a pillar erected on the body frame; and a position holding mechanism which is provided across between the support and the grain storage unit and can hold the position of the grain storage unit in the action posture, wherein the support is a part of the frame body supporting the work table on the grain storage unit side.

With this configuration, the grain tank as the grain storage unit is supported by the body frame so as to be freely swingable about the vertical axis, and the posture can be changed between the working posture and the maintenance posture. The support column disposed to hold the position of the grain tank in the operating posture by the position holding mechanism functions as a frame body, and supports a portion of the work table located on the grain storage portion side.

That is, since the part of the work table located on the grain storage portion side is supported by the support column disposed to hold the position of the grain box as the grain storage portion in the operating posture, the work table can be supported by a simple structure without complicating the structure as in the case of disposing a dedicated support frame for supporting the work table by the dual use of the components.

In a preferred embodiment, the grain storage unit is a grain tank supported by a machine frame so as to be rotatable about an upper and lower axis between an operating posture in which the grain storage unit is retracted into the machine frame to store grains and a maintenance posture in which the grain storage unit is extended outward from the machine frame, and the combine harvester includes: a rear support column which is vertically arranged at the rear part of the machine body frame and supports the grain storage part in a free rotation mode; and a connecting member that connects the rear stay and the threshing device, wherein the connecting member supports a portion of the work table located on the grain storage portion side as the frame body.

With this configuration, the grain tank as the grain storage unit is supported by the body frame so as to be freely swingable about the vertical axis, and the posture can be changed between the working posture and the maintenance posture. That is, the grain storage unit is supported by a rear support provided upright at the rear of the body frame so as to be rotatable about the vertical axis, and the posture of the grain storage unit can be changed between the working posture and the maintenance posture. Further, the rear stay, to which a load in the crosswise falling direction is applied by supporting the grain storage part, is connected to the threshing device by the connecting member, thereby improving the supporting strength in the crosswise falling direction. The connecting member functions as a frame body for supporting a portion of the work table located on the grain storage portion side.

That is, since the portion of the work table located on the grain storage portion side is supported by the coupling member disposed to reinforce the rear stay for rotatably supporting the grain storage portion, the work table can be supported by a simple structure without complicating the structure as in the case where a dedicated support frame for supporting the work table is disposed by using the member in combination.

In a preferred embodiment, the threshing device further includes a support member fixedly connected to a side wall of the threshing device and extending to the grain storage portion side, and the support member serves as a portion of the frame body that supports the work table on the grain storage portion side.

With this configuration, the supporting member fixedly connected to and firmly supported by the side wall of the threshing device is provided in a state of extending to the grain storage portion side. The support member functions as a frame body to support a portion of the work table located on the grain storage portion side.

Therefore, the supporting member fixed to the side wall of the threshing device supports the portion of the work table located on the grain storage portion side, and the threshing device supports the portion of the work table located on the threshing device side, so that the portion of the work table located on the threshing device side and the portion of the work table located on the grain storage portion side can be stably supported by the threshing device.

In a preferred embodiment, the work table has a skid-proof portion on an upper surface thereof.

With this configuration, when an operator steps on the work table to perform work, the antiskid portion is provided, so that the possibility of instability of the posture due to foot slip is low, and work can be performed in a stable posture.

In a preferred embodiment, an exhaust duct through which exhaust gas from an engine mounted on the machine body flows is provided between the threshing device and the grain storage unit, and the exhaust duct is located below the work table.

With this configuration, the exhaust gas from the engine flows through the exhaust pipe provided between the threshing device and the grain storage unit and is discharged to the outside. Further, since the exhaust pipe is located below the work table, an operator who works on the work table can work without the inconvenience of contacting the exhaust pipe by moving away from the exhaust pipe via the work table.

In a preferred embodiment, a rear end portion of the exhaust pipe is located above the work table.

With this configuration, the rear end portion of the exhaust pipe is a portion from which the exhaust gas of the engine is discharged to the outside, but since the rear end portion of the exhaust pipe is located above the work table, the exhaust gas of the engine having a high temperature can be discharged to a portion above the work table and opening to the outside.

As a result, the high-temperature exhaust gas can be satisfactorily discharged to the outside without accumulating on the lower side of the table.

In a preferred embodiment, the exhaust pipe is angled upward at a position closer to the front side than the rear end portion of the work table, and a notch or an opening through which the exhaust pipe passes is formed in the rear end portion of the work table.

With this configuration, a notch or opening is formed in the rear end portion of the work table, and the exhaust pipe passes through the notch or opening at a portion where the angle is changed upward.

In this case, the rear end of the work table is positioned on the front side of the portion where the exhaust pipe is upwardly angled, that is, the work table is opened across the entire work table at the portion where the exhaust pipe is upwardly angled, and the length of the work table is short, so that the work range of the worker is limited to a narrow range.

In contrast, with the above configuration, the operator's working range can be expanded as much as possible along the front-rear direction of the machine body while allowing the exhaust pipe to change its posture upward.

In a preferred embodiment, the exhaust pipe includes a cover member that covers an outside of the grain storage portion of the exhaust pipe, and the cover member is supported by the work table.

With this configuration, the outer part of the grain storage part of the exhaust pipe is covered with the cover member. For example, in the case of a configuration in which the orientation can be changed to a maintenance orientation in which the grain storage unit is extended outside the machine body in order to open the space formed between the grain storage unit and the threshing device, when the grain storage unit is switched to the maintenance orientation, the operator can avoid contact with the exhaust pipe by the cover member when entering the space formed between the grain storage unit and the threshing device and performing maintenance work, and therefore, work can be performed safely.

As a preferred embodiment, the cover member has: a lateral part covering the lateral side of the grain storage part side of the exhaust pipe; and a bottom portion that covers a lower side of the exhaust pipe, and a vertical interval from the work table to the exhaust pipe is set larger than a vertical interval from the exhaust pipe to the bottom portion of the cover member.

With this configuration, since the cover member covers the lateral side of the grain storage portion of the exhaust pipe and the lower side of the exhaust pipe, respectively, the operational safety of the maintenance operation can be ensured. Further, since the vertical distance from the work table to the exhaust pipe is set larger than the vertical distance from the exhaust pipe to the bottom of the cover member, heat from the exhaust pipe is less likely to be transmitted to the work table, and the safety of work on the work table can be ensured.

In a preferred embodiment, a frame body supporting a portion of the work table on the grain storage portion side extends obliquely upward from a side wall of the threshing device toward the grain storage portion side, and a corner portion between the lateral portion and the bottom portion of the cover member is supported by the frame body.

With this configuration, the frame body extends obliquely upward from the side wall of the threshing device toward the grain storage portion side, and is configured by a linear member or the like having sufficient support strength, and the structure can be simplified. Further, since the frame body passes through the vicinity of the corner portion of the cover member, the corner portion of the cover member is supported by the frame body.

Therefore, by effectively using the frame body disposed to support the work table and using the support member also as the cover member, the support structure can be simplified as compared with a structure including a dedicated support member.

In a preferred embodiment, a heat insulating portion is provided between the work table and the exhaust pipe.

With this configuration, heat from the exhaust pipe is blocked by the heat insulating portion and is not easily transmitted to the work table. As a result, the worker who works on the work table is less likely to be affected by heat, and the safety of the work can be improved.

In a preferred embodiment, the grain threshing machine includes a grain winnowing device which is located laterally outside a side wall of the threshing device and conveys grain discharged from the outside of the threshing device upward toward an upper inlet of the grain storage unit, and the work table is formed by dividing in the front-rear direction: a front side table part which is positioned at the front side of the grain lifting device; and a rear side table part located at the rear side of the grain winnowing device.

Through this structure, the grain that obtains through threshing process is discharged to the outside from thresher after, carries upwards and supplies to the inside of grain storage unit from the upper portion entry through grain hoisting device.

In order to efficiently store the grains in the grain storage unit, the upper inlet is preferably formed at a position as high as possible in the grain storage unit, and the grain delivery device is preferably extended from a lower position at the bottom of the threshing device to a higher position at the upper part of the grain storage unit along the vertical direction. Thus, when the working platform is arranged between the threshing device and the grain storage part, the working platform and the grain lifting device which is long in the vertical direction interfere with each other.

Therefore, the work table is divided into a front side table portion located on the front side of the grain delivery device and a rear side table portion located on the rear side of the grain delivery device, so that the grain delivery device can be designed to extend long in the vertical direction, and the work table can be provided between the threshing device and the grain storage part across a wide range in the front-rear direction.

(3) It is more preferable when the solutions described below have ones of "solution 1", "solution 2", and "solution 4" described below. However, the following scheme is optional, and even if the following scheme is provided independently of the other schemes, it is preferable.

As a combine harvester in which a threshing device and a grain storage unit are arranged side by side in a state of being arranged in the left and right direction on a vehicle body frame, there is a combine harvester having the following configuration. A column-shaped member is mounted on the rear side of the grain box for supporting the grain box and the discharger on the rear side, and the lower end side of the column-shaped member is pivotally supported on the vehicle body frame in a manner of freely rotating around the vertical axis. Further, the pillar-shaped member is supported by another vertical frame fixed to a vehicle body frame so as to be relatively rotatable. The fuel tank is disposed in a narrow space between the threshing device and the column-like member and the vertical frame on the rear side of the grain tank (see, for example, japanese unexamined patent publication No. 2012 and 090556 (JP 2012 and 090556A)).

In the structure shown in JP 2012 and 090556A, when the box is opened for maintenance or the like, the tripper is also rotated about the common vertical axis as in the grain box, and is maintained in a state in which the relative posture is not changed. In this way, since the tripper and the grain tank are configured to rotate about the common upper and lower axes, and the relative postures of the tripper and the grain tank do not change when viewed from above, it is advantageous that, when opening the grain tank for maintenance or the like, it is not necessary to take trouble to load and unload the transmission structures of the grain tank and the tripper, and it is not necessary to take trouble to connect and disconnect the grain conveying path in the middle, or the like.

However, in the above-described configuration, the threshing device is provided in the space on the rear side of the grain tank on one side in the left-right direction, and many support structures such as a column-shaped member and a vertical frame for supporting the grain tank so as to be rotatable about the vertical axis are provided on the other side, and the installation space of the fuel tank is limited to a narrow range. Thus, there is still room for improvement in that it is difficult to dispose a fuel tank having a large capacity.

In this case, as a preferred embodiment, a fuel tank having a large capacity can be disposed in a space between the threshing device and the grain tank. Specifically, the threshing device and the grain storage unit are arranged side by side in a state of being arranged in the left-right direction on the vehicle body frame, and the fuel tank is disposed so as to enter into a space between facing portions of the threshing device and the grain storage unit.

With this configuration, the space between the opposite positions of the threshing device and the grain storage unit is effectively utilized as a space for disposing the fuel tank on the vehicle body frame, and the capacity of the fuel tank can be increased. Further, since the fuel tank is located between the threshing device and the grain storage unit, which are heavier in weight, there are advantages in that: even if the capacity is large, it is easy to maintain a state in which the vehicle body balance variation due to increase and decrease of fuel is small.

In a preferred embodiment, the fuel tank is disposed on a rear side of the body of the space. With this configuration, since the fuel tank is disposed on the rear side of the machine body, the fuel tank is easy to supply from the rear side of the machine body, which is advantageous in terms of convenience in use.

In a preferred embodiment, the fuel tank is supported by the vehicle body frame. With this configuration, when a fuel tank having a large capacity is loaded, it is not necessary to provide a frame portion constituting a loading table for loading the fuel tank separately from the body frame, and the body frame for loading the threshing device and the grain storage unit can be directly used, so that there is an advantage that the configuration can be simplified.

In a preferred embodiment, the fuel tank has a projecting portion on a rear end side thereof, and the projecting portion projects rearward from a rear end of the threshing device. With this configuration, by providing the projecting portion, the space on the rear side of the threshing device is also used as the space for disposing the fuel tank, and the capacity can be further increased.

In a preferred embodiment, the fuel tank has a projecting portion on a rear end side thereof, and the projecting portion projects rearward from a rear end of the grain storage portion. With this configuration, by providing the projecting portion, the space on the rear side of the grain storage portion is also used as the space for disposing the fuel tank, and the capacity can be further increased.

In a preferred embodiment, a discharger is provided on the outside of the body of the protruding portion, and the discharger discharges grains from the grain storage portion. With this configuration, since the discharger for discharging grains from the grain storage unit is provided, the space inevitably existing on the vehicle body frame on the rear side of the grain storage unit can be effectively used, and the capacity of the fuel tank can be increased without difficulty by making rational use of the space.

As a preferred embodiment, the fuel tank has a projecting portion on a rear end side thereof, the projecting portion projecting rearward as compared with a rear end portion of the vehicle body frame. With this structure, the capacity of the fuel tank can be further increased by providing the projecting portion.

As a preferred embodiment, there is a guard member below the projecting portion of the fuel tank, the guard member restricting other objects from contacting the fuel tank from the lower side. With this configuration, it is possible to suppress another object from coming into contact with the fuel tank protruding rearward from the rear end portion of the vehicle body frame from below.

As a preferred embodiment, a guard member is provided behind the projecting portion of the fuel tank, the guard member restricting other objects from contacting the fuel tank from the rear side. With this configuration, it is possible to suppress another object from coming into contact with the fuel tank protruding rearward from the rear end portion of the vehicle body frame from the rear side.

In a preferred embodiment, a discharger for discharging grains from the grain storage unit is provided behind the grain storage unit in a state of protruding rearward of the body frame, and the guard member is provided behind and below the discharger. With this configuration, it is possible to suppress contact of another object with the fuel tank protruding rearward from the rear end portion of the vehicle body frame from the rear side or the lower side.

As a preferred embodiment, a fuel supply port is provided at an upper portion of the projecting portion of the fuel tank. With this configuration, since the fuel supply port is provided above the projecting portion, the fuel tank can be easily replenished with fuel from the rear side.

In a preferred embodiment, the fuel tank is disposed at a position overlapping the grain storage portion in a plan view. With this configuration, the space below the grain storage unit is effectively used as the space for disposing the fuel tank, and the capacity of the fuel tank can be increased.

In a preferred embodiment, the grain storage unit has a grain tank, an inclined portion whose lower end is narrowed is formed below the grain tank, and the fuel tank is disposed in a state of entering the inclined portion. With this configuration, the lower space of the inclined portion of the grain tank can be effectively utilized, and the capacity of the fuel tank can be increased.

In a preferred embodiment, the grain tank has a bottom spiral body for discharging inner grains, the bottom spiral body is disposed at a position closer to the outer side of the body in the left-right width direction of the grain tank, and the inclined portion is formed at the inner side of the body of the bottom spiral body. With this configuration, since the bottom screw of the grain tank is located on the laterally outer side of the body in the lateral width direction, the lower space formed in the inclined portion located on the inward side of the body with respect to the bottom screw is widened, and therefore, the fuel tank having a large capacity can be easily disposed by using the lower space.

In a preferred embodiment, the fuel tank is formed with an inclined surface inclined outward and downward at a portion facing the inclined portion. With this configuration, since the fuel tank having the inclined surface inclined downward outward downward is disposed at a position opposite to the inclined portion that is narrowed downward and formed below the grain tank, the space below the inclined portion of the grain tank can be further effectively utilized, and a large fuel tank capacity can be secured.

As a preferred embodiment, the inclined surface is set at an inclination angle along the inclined portion. With this configuration, the inclined portion of the grain tank and the inclined surface of the fuel tank can be arranged in close proximity to each other to the maximum extent while maintaining the minimum required distance between the inclined portions. Therefore, the space under the inclined part of the grain tank can be effectively utilized, and larger fuel tank capacity can be ensured.

In a preferred embodiment, the fuel supply port of the fuel tank is provided at a position between a lateral wall of the grain tank side of the threshing device and a lateral wall of the grain tank side of the threshing device. With this configuration, the fuel supply port of the fuel tank can be easily opened and closed without being obstructed by the threshing device and the grain tank. Further, since the fuel filler does not enter the lower side of the inclined portion of the grain tank, there is no fear that the presence of the fuel filler restricts the size of the entire tank, and a large fuel tank capacity can be easily secured.

In a preferred embodiment, the fuel tank is formed with an upward surface and the inclined surface in a horizontal or substantially horizontal posture, and the fuel fill inlet of the fuel tank is provided in the upward surface. With this configuration, the fuel filler opening is located at the highest position of the fuel tank, so that the fuel can be easily supplied into the fuel tank, and the inclined surface can be arranged deep below the inclined portion of the grain tank without being hindered by the presence of the fuel filler opening.

In a preferred embodiment, a rising wall portion is provided on a lateral wall of the fuel tank on a side facing the grain tank, at a position deviated in a left-right direction from a lower end of the inclined portion, the rising wall portion rising on an upper side of the vehicle body frame and being continuous with a lower end side of the inclined surface, and an upper end of the rising wall portion being provided so as to be positioned on an upper side of a lower end of the grain tank.

With this configuration, since the rising wall portion connected to the lower end side of the inclined surface is provided on the lateral wall of the fuel tank on the side opposite to the grain tank, a reduction in capacity due to an increase in the proportion of the fuel tank to the planar arrangement space is avoided, a large fuel tank capacity is secured, and the space on the traveling machine body can be effectively utilized.

That is, by providing the inclined surface which is inclined downward outward below the inclined portion extending deep into the grain tank, the capacity of the fuel tank can be increased. However, at a portion where the inclined surface of the fuel tank is inclined downward outward, the increase rate of the fuel tank capacity tends to become smaller with respect to the increase rate of the arrangement space of the fuel tank. Therefore, when the fuel tank is formed so as to face the inclined surface of the fuel tank up to a position near the lower end portion of the inclined portion of the grain tank, the arrangement space in plan view of the entire fuel tank becomes considerably large, but the capacity in the fuel tank is not increased much.

Therefore, in this configuration, the rising wall portion that is provided upright on the upper side of the vehicle body frame and is continuous with the lower end side of the inclined surface is provided at a position deviated in the left-right direction from the lower end of the inclined portion of the grain tank, whereby the advantage of increasing the capacity of the fuel tank by providing the inclined surface on the fuel tank is effectively utilized, and the range in which the increase ratio of the capacity of the fuel tank is small with respect to the increase ratio of the arrangement space of the fuel tank is narrowed, and the space on the traveling machine body can be effectively utilized.

In a preferred embodiment, the upper wall of the fuel tank is provided with a vent hole on the upward surface thereof in a state of being located at or near the center of area in a plan view. With this configuration, even if the fuel tank changes its posture in accordance with the rolling or pitching of the travel machine body, the vent hole is easily maintained in a state of always communicating with the internal space in the upper portion of the fuel tank, and the air in the tank is easily removed without hindrance.

In a preferred embodiment, a fuel return pipe for returning fuel from the engine is connected to the upward surface of the upper wall of the fuel tank so as to be positioned at or near the center of the area in plan view. With this configuration, even if the fuel tank changes its posture with the rolling or pitching of the traveling machine body, the connection portion between the fuel return pipe and the engine can be maintained in a state of always communicating with the upper space in the fuel tank, and the occurrence of the backflow of the fuel in the fuel tank due to the change in the posture of the fuel tank can be reduced.

In a preferred embodiment, a drain port for discharging fuel oil in the tank is provided in a bottom wall of the fuel tank so as to be positioned at or near the center of the area of the bottom surface of the fuel tank. With this configuration, the fuel in the fuel tank can be discharged in a large part reliably not only when the traveling machine body is in a completely horizontal posture but also in a slightly inclined posture.

In a preferred embodiment, the discharger that discharges grains from the grain storage unit is capable of switching between a discharge posture in which a discharge-side end portion is directed outward in a lateral direction of the body on a side opposite to a side on which the fuel tank is disposed, and a storage posture in which the discharge-side end portion is directed upward in the vehicle body frame. With this configuration, since the fuel tank is located at a position that is independent of the swing range of the tripper, there is no disadvantage such as the height of the fuel tank being limited by the swing range of the tripper, and the fuel tank with a large capacity can be disposed.

In a preferred embodiment, the fuel tank is disposed at a position more rearward than a secondary returning device that returns the secondary material to the threshing unit in the threshing device. With this configuration, the fuel tank can be disposed by effectively utilizing the space between the opposing portions of the grain storage unit and the threshing unit that must be provided for disposing the secondary return device.

In a preferred embodiment, the fuel tank is disposed so as to extend from a rear side of the machine body to a position near a rear end of the secondary return device. With this configuration, the fuel tank can be disposed so as to extend from the rear side of the machine body to the vicinity of the rear end portion of the secondary return device in the front-rear direction, and therefore the capacity of the fuel tank can be further increased.

As a preferred embodiment, the fuel tank is disposed at a position overlapping the secondary return device when viewed in the front-rear direction of the machine body. With this structure, the fuel tank is disposed at a position overlapping the secondary return device when viewed in the front-rear direction of the machine body. That is, the secondary return-back device and the fuel tank are disposed in a state of being distributed on the front side and the rear side in the front-rear direction and overlapping each other in the left-right direction. Therefore, the entire width in the left-right direction at the narrow space between the opposing portions of the threshing device and the grain storage unit can be effectively used regardless of the presence of the secondary return device in the left-right direction, and the width in the left-right direction of the fuel tank can be further increased.

In a preferred embodiment, the grain storage unit includes a grain tank that is rotatable about vertical axes provided in the vehicle body frame and having a vertical posture, and is capable of freely switching between a work posture in which the grain tank is stored in the travel machine body at a position close to the fuel tank and an inspection posture in which the grain tank is extended outward in a lateral direction of the travel machine body away from the fuel tank. With this configuration, since the grain tank is freely switched between the work posture in which the grain tank is stored in the travel machine body at a position close to the fuel tank and the inspection posture in which the grain tank is extended outward in the lateral direction of the travel machine body away from the fuel tank, maintenance work around the fuel tank is facilitated.

In a preferred embodiment, the fuel tank is disposed at a position further to the inside of the body than the position where the vertical axis is present. With this configuration, since the fuel tank is located at a position that is offset to the inside of the body in the left-right direction with respect to the position where the upper and lower axes that constitute the rotation center of the grain tank exist, it is not necessary to provide a space for avoiding mutual interference with the grain tank, a related operating mechanism that rotates outside the body along with the grain tank, and the like, and it is easy to effectively utilize the space on the traveling body.

In a preferred embodiment, the linear body placement plate is provided at the gap, and the linear body placement plate is configured such that a small gap is left between the convex strip portions having a cross-sectional shape that is convexly curved upward, and that a foreign object dropping opening through which foreign objects drop downward is formed between the convex strip portions. With this configuration, the gap between the convex strip portions of the linear body mounting plate, which are formed in a shape that is convexly curved upward, is utilized, which is advantageous in that the duct installation and wiring can be easily performed. Further, since the inclusion drop port is formed between the convex plate portions, it is easy to avoid a state where dust such as inclusions and straw chips is accumulated between the convex plate portions.

(4) It is more preferable when the solutions described below have ones of "solution 1", "solution 2", and "solution 3". However, the following scheme is optional, and even if the following scheme is provided independently of the other schemes, it is preferable.

In the combine shown in JP 2012 and 090556A, the travel machine body includes a grain tank for storing grains and a discharger for discharging grains, and a simple discharger having a straight longitudinal conveyance path from an inlet-side end portion to a discharge-side end portion of the grain tank, the discharger being capable of freely switching a posture between a storage posture in which the discharge-side end portion is directed upward and a discharge posture in which the discharge-side end portion is directed outward, is used as the discharger.

As shown in JP 2012 and 090556A, in a combine harvester having a structure using a simple discharger, for example, a pillar-shaped member is attached to the rear side of a grain tank, the lower end side of the pillar-shaped member is pivotally supported on a vehicle body frame so as to be rotatable about an axis in the vertical direction, and the pillar-shaped member is relatively rotatably supported on another vertical frame fixed to the vehicle body frame.

When the combine harvester with the structure is unpacked for maintenance and the like, the discharger rotates around the common upper and lower axes like the grain box, and maintains the state that the relative posture is not changed. In this way, by configuring the discharger and the grain tank to rotate about the common upper and lower axes, since the relative postures of the discharger and the grain tank are not changed when viewed from the plane, it is advantageous in that, when the grain tank is opened for maintenance or the like, it is not necessary to take trouble to attach and detach the transmission structure for attaching and detaching the grain tank and the discharger, and it is not necessary to take trouble to connect/disconnect the grain conveying path in the middle, or the like.

In the harvester having the above configuration, the stay-like members attached to the rear side of the grain tank are connected as follows: the upper end side is connected with the rear part of the grain box, and the lower end side supports the vicinity of a grain discharge opening for discharging grains from the grain box to the discharger. That is, in order to provide a transmission structure of the bottom of the grain box, the discharger, and the like at a position of the grain conveying path from the grain box to the discharger, the grain box is configured to be very strong, and the entire grain box is easily supported by the pillar-shaped member without increasing the entire strength of the grain box. Therefore, the pillar-like member tends to be arranged as follows: the rear part of the grain box supports the part near the grain outlet for discharging grains from the grain box to the discharger as much as possible.

As a result, the column-shaped member is positioned close to a grain discharge port for discharging grains from the grain tank to the discharger, supports the vicinity of the grain discharge port, and is rotatable about the vertical axis with respect to the vehicle body frame. Therefore, there is a room for improvement in that the supporting structure of the supporting member is easily complicated by using a supporting member or the like which is configured to go around the grain conveying path from the grain tank to the discharger.

Here, as a preferred embodiment, the traveling machine body includes: a grain box for storing grains; and a discharger for discharging grain from the grain tank, wherein the grain tank is supported by a support frame and is freely switched between a working posture and an inspection posture, the support frame is erected on a vehicle body frame of the traveling machine body at a rear side of the grain tank, the working posture is a posture in which the grain tank is stored in the traveling machine body, the inspection posture is a posture in which the grain tank is extended laterally outward from the traveling machine body, the discharger has a vertical cylinder portion, and is freely switched between the storage posture and a discharge posture, the vertical cylinder portion has a linear vertical transport path extending from an introduction-side end portion to a discharge-side end portion, wherein the introduction-side end portion is connected to a grain discharge port of the grain tank, the discharge-side end portion is formed with a grain discharge port, and the storage posture is a posture in which the discharge-side end portion is directed upward, the discharge posture is a posture in which the discharge side end portion is directed outward, and the grain tank and the tripper are supported by the support frame so as to be rotatable about upper and lower axes.

By this structure, the grain tank and the discharger are supported on the vehicle body frame vertically disposed on the traveling machine body in a manner of freely rotating around the upper and lower axes, instead of being directly supported on the vehicle body frame in a manner of freely rotating around the upper and lower axes.

Therefore, when the positions of the rotation axes of the grain box and the tripper are set, the positions can be set at any positions on the supporting frame erected from the car body frame, but not at the positions on the car body frame.

Therefore, the structure of the supporting frame itself can be easily simplified and the structure of the grain box and the discharger can be supported in a freely rotating manner around the upper and lower axes without a complicated structure that the parts supporting the grain box and the discharger are supported on the car body frame while winding around the grain conveying path from the grain box to the discharger.

In a preferred embodiment, the grain tank is supported at a plurality of positions in the vertical direction of the supporting frame. With this configuration, the grain tank is supported at a plurality of positions in the vertical direction of the support frame, and can be supported stably in a manner of rotating around the vertical axis.

In a preferred embodiment, the grain tank is supported by a supporting portion of the supporting frame, which is supported at a lowermost position, so as to be freely rotatable while being placed on a placing portion of the supporting frame. With this configuration, since the support frame includes the placement portion and the support portion at the lowermost position of the grain tank is supported by the placement portion, the support portion of the grain tank can be arranged regardless of the structure or shape of the space below the placement portion. Therefore, the structure of the supporting portion of the grain tank can be simplified without being affected by the structure and shape of the space below the placement portion.

In a preferred embodiment, the grain tank has a mounting frame at the rear, which is supported in a freely rotatable manner on the support frame. With this configuration, since the grain tank can be rotatably supported by the mounting frame disposed at the rear portion of the grain tank, the common mounting frame can be used regardless of a change in the shape or the capacity of the main body portion of the grain tank to which the mounting frame is attached. Therefore, the number of parts can be reduced and the structure can be simplified by sharing the mounting frame.

In a preferred embodiment, the mounting frame is formed of a longitudinal member extending from the lowermost supporting portion to the uppermost supporting portion. With this configuration, the mounting frame is formed of a vertically long member spanning from the lowermost support portion to the uppermost support portion, and thus the mounting frame also functions as a coupling device for coupling the lowermost support portion and the uppermost support portion, which facilitates further simplification and miniaturization of the structure.

As a preferred embodiment, the mounting frame is constituted by a cylindrical body having a circular cross section. With this configuration, since the attachment frame is formed of a columnar body having a circular cross section, the attachment frame itself can be used as a pivot shaft having a swing axis center of the grain tank and the discharger.

Therefore, the structure can be simplified as compared with a structure in which a pivot support shaft is provided separately from the mounting frame.

As a preferred embodiment, the upper side of the mounting frame is supported in a freely rotatable manner around the support frame. With this configuration, the upper side of the attachment frame that is rotatable together with the grain tank is supported so as to freely rotate around the support frame, and therefore, the rotation operation of the grain tank is easily performed while the posture of the attachment frame is maintained in a stable state.

In a preferred embodiment, the inlet-side end portion connected to a grain discharge port of the grain tank is disposed so as to be located below the placement portion of the support frame. With this configuration, the installation frame constituting the rotation center of the grain box and the discharger can be overlapped with the leading-in side end portion of the discharger connected to the grain discharge port of the grain box by configuring the leading-in side end portion of the discharger to enter the lower side of the mounting portion. Thus, the mounting frame and the supporting frame can support the part as close as possible to the grain outlet for discharging grains from the grain box to the discharger. Therefore, the strength near the grain discharging port with high strength is effectively utilized, the grain box and the discharger can be reliably supported by a simple structure, and the structure is not complicated.

In a preferred embodiment, the support frame has the vertical tube portion at a position rearward of the placement portion. With this configuration, the placement section for supporting the frame is disposed between the rear surface side of the grain tank and the linear longitudinal cylinder section of the discharger, and the attachment frame can be disposed, so that the grain tank, the discharger, and the structure for rotatably supporting them can be compactly disposed while avoiding an increase in the length of the combine in the front-rear direction.

In a preferred embodiment, the discharger is configured to switch the vertical tube portion to the attitude by rotating the vertical tube portion around a horizontal axis of the inlet-side end portion. With this configuration, the vertical cylinder can be rotated about the horizontal axis of the inlet-side end, so that the position of the discharger can be changed, and a grain discharge structure that can swing up and down can be obtained with a simple structure.

In a preferred embodiment, the support frame is provided at a position closer to the inside of the machine body than a position where the vertical cylinder portion is present in the left-right direction. Through this structure, the swing axle center that makes the tripper is located the position that is close to the tip side in the left and right directions of organism as far as possible, is favorable to discharging the position of keeping away from the organism more easily with the length of the vertical section of thick bamboo portion of same tripper.

In a preferred embodiment, the grain tank has a mounting frame at a rear portion thereof, the mounting frame being rotatably supported by the support frame, and the mounting frame has a receiving portion for receiving and supporting the vertical tube portion of the discharger in a storage posture. With this configuration, since the mounting frame can be used as a mounting device for the receiving portion that blocks the vertical cylinder portion supporting the storage attitude of the tripper, the structure can be simplified by using the components in common.

Further, since the receiving portion is provided on the mounting frame, the grain tank and the discharger can be directly rotated about the vertical axis in a state of blocking the vertical cylinder portion when opening the box. Therefore, the present invention is also useful in that the turnover of the ejector from the receiving portion before opening the box can be eliminated.

As a preferred embodiment, the receiving portion is capable of adjusting an installation position with respect to the mounting frame. With this configuration, since the mounting position of the receiving portion with respect to the mounting frame can be adjusted, the storage posture of the discharger can be stably maintained. That is, for example, when the tripper is set to the storage posture, if the vertical cylinder portion is not in contact with the receiving portion, the storage posture of the tripper can be maintained by a device for changing the posture of the tripper, and there is a possibility that the posture is not stabilized, but such a disadvantage can be avoided by adjusting the mounting position of the receiving portion, and the vertical cylinder portion supporting the tripper can be blocked with good stability.

In a preferred embodiment, the traveling machine body has a receiving portion for receiving and supporting the vertical tube portion of the tripper in the storage posture, and the receiving portion is adjustable in a mounting position on the traveling machine body. With this configuration, the vertical cylinder portion of the discharger can be easily changed in posture by using the swing drive device. Further, since the mounting position of the receiving portion provided in the traveling machine body is adjustable, the storage posture of the tripper can be stably maintained. That is, even if the vertical cylindrical part is swung to the operation limit of the swing drive device when the tripper is set to the storage posture by the swing drive device, the storage posture of the tripper can be maintained by the support of the swing drive device or the like as long as the vertical cylindrical part is not in contact with the receiving part.

As a preferred embodiment, the receiving portion includes: a position adjusting part which can change the position of the bearing part in the left-right direction and fix the bearing part; and a buffer member capable of elastically deforming in volume by abutting against the vertical cylinder portion. With this configuration, by providing the position adjusting portion and the volume elastically deformable cushion member, even when the shape and size of the inner peripheral side of the receiving portion are slightly different from those of the outer peripheral side of the vertical cylindrical portion, or the position of the center of curvature of the inner peripheral side of the receiving portion is slightly displaced from that of the outer peripheral side of the vertical cylindrical portion, the amount of this shape, size, or displacement can be easily absorbed, and the receiving portion can be provided with further good stability.

In a preferred embodiment, a lock mechanism is provided for holding the vertical tube portion, which is supported by the receiving portion in a stopped manner, in a position with respect to the receiving portion. With this configuration, the vertical tube portion can be locked in a state of being supported by the receiving portion, and the position can be reliably held.

As a preferred embodiment, there is a transverse frame which joins the supporting frame and the side walls of the threshing device. With this configuration, the support frame is coupled and supported to the threshing device, so that the strength of the support frame can be increased by the threshing device.

In a preferred embodiment, the grain box further comprises a swing drive device for changing the posture by swinging the vertical cylinder part, wherein one end of the swing drive device is supported by a part of the grain box, and the other end of the swing drive device is supported by the vertical cylinder part. With this configuration, the space between the grain tank and the vertical cylinder of the discharger is used as the space for arranging the swing drive device, and the whole device can be easily and compactly configured.

In a preferred embodiment, a mounting bracket is provided to project rearward from the grain tank, and the one end of the swing drive is connected to the mounting bracket. With this configuration, since the one end portion of the swing drive device is connected to the mounting bracket projecting rearward from the grain box, the swing drive device can be disposed at a position as close as possible to the vertical tube portion of the discharger. Therefore, compared to the case where the swing drive device is located at a position away from the vertical cylinder portion and the tripper is made to perform the heave motion, the possibility that the tripper and the swing drive device are torsionally deformed by the drive force generated by the extension and contraction of the swing drive device with respect to the tripper is small, and flexible operation is easy.

In a preferred embodiment, the grain tank has a mounting frame at a rear portion thereof, the mounting frame is rotatably supported by the support frame, and the mounting bracket is coupled to the mounting frame. With this configuration, since the mounting bracket is coupled to the mounting frame and mutually reinforces, the strength of the supporting portion of the grain tank and the strength of the mounting portion of the swing drive device can be improved.

In a preferred embodiment, the swing drive device is disposed between a mounting frame and the vertical cylinder portion in the front-rear direction, wherein the mounting frame is provided at the rear of the grain box. Through this structure, between the back wall of the vertical section of thick bamboo portion of tripper and corn case, the installation frame is located the position that is close the corn case, and swing drive arrangement exists in the position that is close vertical section of thick bamboo portion. Thus, the attachment frame constituting the swing center supports the grain box near the grain box when the grain box is opened, and the swing drive device can swing the vertical tube section at a position as close as possible to the vertical tube section as the operation target. Therefore, it is advantageous in that the supporting structure of the grain box can be made small and light, and the swing operation of the swing driving device to the discharger can be easily and smoothly performed.

As a preferred embodiment, the grain tank has task lights. Through this structure, even when carrying out the operation that makes the tripper undulate and swing, also can shine prescribed position through the operation lamp that the corn box possesses. Therefore, it is possible to perform work without paying attention to the change in the irradiation direction when the tripper undulates and swings, as in the case where, for example, a work lamp is provided at the tip end portion of the tripper.

In a preferred embodiment, the grain tank has a mounting frame at a rear portion thereof, the mounting frame is rotatably supported by the support frame, and a work light is provided on an upper portion of the mounting frame. With this configuration, even when the discharger is waved, a predetermined portion can be illuminated by the operation lamp provided in the mounting frame. Therefore, it is possible to perform work without paying attention to the change in the irradiation direction when the tripper undulates and swings, as in the case where, for example, a work lamp is provided at the tip end portion of the tripper.

In a preferred embodiment, the grain tank has a placement support portion that supports a front end portion of the grain tank on the vehicle body frame, and the grain tank is supported by the traveling machine body via the placement support portion and the support frame in a working posture in which the grain tank is stored in the traveling machine body. With this configuration, since the front end side of the grain tank is supported by the placement support portion, it is not necessary to increase the support strength of the support frame and the attachment frame more than necessary, as compared with a case where the grain tank is supported only by the support frame and the attachment frame on the swing center side of the grain tank, which is advantageous in that the entire weight can be easily reduced.

In a preferred embodiment, a grain box is connected to a grain winnowing device for winnowing and carrying grains from a threshing device, and a perspective window capable of peeping the inside of the grain box is formed on a throwing-in side of the grain box close to the grain winnowing device and a throwing-in side of the grain box far from the grain winnowing device when viewed in the front-rear direction in a state where the grain box is in the working posture. With this configuration, in the grain box, the grain storage state in the grain box can be easily grasped over a wider range and with high accuracy, as compared with a configuration in which the see-through window is formed only on one of the side close to the inlet of the winnowing device and the side far from the inlet of the winnowing device.

Other features and advantageous effects resulting therefrom will become apparent upon reading the following description with reference to the accompanying drawings.

Drawings

Fig. 1 is an overall side view of a combine harvester of a first embodiment (hereinafter, the same as fig. 10).

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

Fig. 3 is a top view of the rear of the combine.

Fig. 4 is a side view of the threshing device.

Fig. 5 is a front longitudinal sectional view of the rear of the combine.

Fig. 6 is a rear view of the combine.

Fig. 7 (a) is a side view of the front-rear divided part of the exhaust pipe, and fig. 7 (b) is a vertical front view of the front-rear divided part of the exhaust pipe.

Fig. 8 (a) is a side view of the front exhaust pipe, and fig. 8 (b) is a vertical sectional front view of the front exhaust pipe.

Fig. 9 (a) is a vertical rear view of a front-rear intermediate portion of the front exhaust pipe, and fig. 9 (b) is a side view of a front-rear intermediate portion of the rear exhaust pipe.

Fig. 10 (a) is a cross-sectional plan view of the rear portion of the rear-side exhaust pipe, and fig. 10 (b) is a longitudinal-sectional rear view of the rear portion of the front-side exhaust pipe.

Fig. 11 is an overall side view of the combine harvester of the second embodiment (hereinafter, the same as fig. 21).

Fig. 12 is an overall plan view of the combine harvester.

Fig. 13 is a side view of the threshing device.

Fig. 14 is a top view of the rear of the combine.

Fig. 15 is a rear view of the combine harvester.

Fig. 16 is a side view of the front exhaust pipe covered with the side cover member and the spacer member.

Fig. 17 is a side view of the front exhaust pipe with the side cover member and the spacer member removed.

Fig. 18 is a side view of the rear portion of the rear side exhaust pipe.

Fig. 19 is a partially cut-away plan view showing a support structure of the exhaust pipe.

Fig. 20 is a plan view of the rear end portion of the exhaust pipe.

Fig. 21 is a vertical rear view of the exhaust pipe arrangement portion.

Fig. 22 is a vertical rear view showing the structure of the cover member according to the other embodiment of the first and second embodiments.

Fig. 23 is a right side view of the whole of the combine harvester according to the third embodiment (hereinafter, the same as fig. 45).

Fig. 24 is a plan view of the whole of the combine harvester.

Fig. 25 is a plan view showing a positional relationship among the grain tank, the thresher, and the fuel tank provided on the vehicle body frame.

Fig. 26 is a rear view showing a positional relationship among the grain tank, the thresher, and the fuel tank provided in the vehicle body frame.

Fig. 27 is a side view showing a supporting structure of the grain box and the discharger.

Fig. 28 is a rear view showing the supporting structure of the grain bin and the discharger.

Fig. 29 is a sectional view XXIX-XXIX in fig. 28.

FIG. 30 is a cross-sectional view of XXX-XXX in FIG. 28.

Fig. 31 is an exploded perspective view showing the support frame and the support structure portion of the mounting frame.

Fig. 32 is an explanatory view showing a state in which the mounting frame of the mounting unit is attached and detached, where fig. 32 (a) shows a state in which the mounting frame is fitted to the annular support body, and fig. 32 (b) shows a state in which the mounting frame is detached.

Fig. 33 is a conceptual diagram showing a transmission system for transmitting power to a grain box.

Fig. 34 is a rear view showing the mounting portion of the jack receiving plate.

Fig. 35 is a perspective view showing an attachment portion of the jack receiving plate.

Fig. 36 is a rear view showing a positional relationship among the grain tank, the threshing device, and the fuel tank provided in the vehicle body frame according to another embodiment.

Fig. 37 is a rear view showing an attachment structure of the grain tank and the discharger and fuel tank according to another embodiment.

Fig. 38 shows a fuel tank according to another embodiment, which is a horizontal sectional view.

Fig. 39 shows a fuel tank according to another embodiment, which is a vertical sectional view taken along the front-rear direction.

Fig. 40 is a plan view showing a positional relationship between the linear body mounting plate and the linear body in another embodiment.

FIG. 41 is a cross-sectional view of XLI-XLI in FIG. 40.

Fig. 42 is a sectional view of a linear body mounting plate portion in another embodiment.

Fig. 43 is a plan view of the whole combine harvester according to another embodiment.

Fig. 44 is a horizontal sectional view showing a mounting structure of a receiving part in another embodiment.

FIG. 45 is a front view showing a grain tank according to another embodiment.

Detailed Description

Hereinafter, each embodiment will be described. The combine harvester exemplified in any of the embodiments is a normal type (normal type) combine harvester (also called a whole-feed type) combine harvester). However, the combine harvester of the present invention is not limited to this type of combine harvester.

In addition, unless otherwise specified, the left-right direction in each embodiment is the left-right direction as viewed from the forward direction of the machine body (for example, in the plan view of fig. 2, the side where the threshing device 4 is present is the left side of the machine body, and the side where the grain tank 5 is present is the right side of the machine body). As a result, the left-right direction in the drawing may not coincide with the above-described left-right direction.

[ first embodiment ]

The first embodiment will be explained below.

[ integral Structure ]

As shown in fig. 1 and 2, a general-type combine harvester includes a cab 3 on the right side of the front portion of a traveling machine body 2 including a pair of right and left crawler traveling devices 1, is disposed behind the cab 3, and includes: a threshing device 4 for threshing the harvested crops; and a grain tank (an example of a grain storage unit) 5 that stores grains obtained by the threshing process. That is, the grain tank 5 is arranged on the right side of the machine body, and the threshing device 4 is arranged on the left side of the machine body. The grain box 5 is provided at the rear thereof with a discharger 6 as a grain discharge device, and the grains stored in the grain box 5 are discharged to the outside of the machine body. Further, an engine 7 is provided below the cab 3, and power of the engine 7 is transmitted to each part of the combine harvester.

A feeder 8 for conveying the harvested straw is connected to the front part of the threshing device 4 so as to be vertically swingable around the horizontal axis, and a harvesting part 9 having a cutting width substantially corresponding to the width of the machine body is connected to the front end of the feeder 8. The harvesting unit 9 includes: rotating the drum 10 to rake the planted vertical grain stalks backwards; a pusher-type harvesting device 11 for cutting off the roots of the planted vertical grain stalks for harvesting; and a transverse feeding screw 12 for transversely feeding and transferring the harvested grain stalks to the middle side in the width direction of the machine body, wherein the grain stalks harvested by the harvesting device 11 are transversely fed by the transverse feeding screw 12 and supplied to the feeder 8. A shredder 13 is provided at the rear of the threshing device 4, and shreds of stalks and the like after threshing processing are shredded.

[ threshing device ]

As shown in fig. 5 and 6, the threshing device 4 is covered on both right and left sides with side walls 14 and on the top with a ceiling 15. A threshing chamber 18 is formed on the upper side of the inner space surrounded by the left and right side walls 14 and the top plate 15, and the threshing chamber 18 has a rotary threshing cylinder 16 and a receiving net, not shown, provided along the outer peripheral portion thereof, and performs threshing processing on the harvested straws fed by the feeder 8. A sorting unit 19 is provided below the threshing chamber 18 to sort the threshed product that has leaked from the receiving net into grains, secondary products, waste straw chips, and the like.

The top plate 15 is supported by the threshing frame 21 via a pivot support portion 20 provided at the left end portion so as to be swingable around the machine body in the front-rear direction toward the axis X1, and is provided so as to be capable of freely switching between a use posture in which the top plate 15 covers the upper side of the threshing chamber 18 and an open posture in which the top plate 15 opens the upper side of the threshing chamber 18.

As shown in fig. 5 and 6, a square-tube-shaped upper frame body 22 is provided at an upper left portion of the threshing chamber 18, and constitutes a part of the threshing frame 21 and extends in the front-rear direction. The top plate 15 is supported by an upper frame body 22 located at the left upper portion of the threshing chamber 18 via a pivot support bracket 23 so as to be swingable around the machine body in the front-rear direction toward the axis X1.

As shown in fig. 7, 9, and 10, a square-tube-shaped upper frame body 24 is provided at the upper portion on the right side of the threshing chamber 18, and constitutes a part of the threshing frame 21 and extends in the front-rear direction. In the state of being switched to the use posture, the swing-side end portion of the top plate 15 is supported by the upper surface 24a of the upper frame body 24 in a manner of being caught and fixed by a plurality of bolts so as to be detachable. That is, the upper surface 24a of the upper frame body 24 functions as a ceiling supporting surface for receiving the ceiling 15 in the use posture.

Although not shown, a gas damper is provided at the rear end of the top plate 15, and the top plate 15 is freely held in position in the state of being switched to the open posture, so that maintenance work such as cleaning and maintenance work inside the threshing device 4 can be easily performed.

The sorting processing unit 19 includes: a swing sorting device (not shown) for receiving the processing object leaked from the receiving net and performing screening by swing motion; a windmill (not shown) for generating separation wind; a primary product recovery unit 27 for recovering grains (primary product); and a secondary material recovery unit 28 for recovering secondary materials such as branched grains (see fig. 4). The configuration of the swing sorting apparatus is not described in detail, but the swing sorting apparatus screens the processed material leaked from the threshing chamber 18 while swinging the processed material, drops grains (primary material) to the primary material collecting unit 27 below, drops secondary material such as branched grains to the secondary material collecting unit 28, and discharges waste straw chips and the like to the rear of the machine body.

The grains collected in the primary product collecting section 27 are fed and conveyed to the outside of the right side of the thresher 4 by a primary screw, not shown. Further, a screw conveyor type grain winnowing device 35 as a processed object conveying part is provided, and grains as threshing processed objects conveyed to the outside of the right side are conveyed upward and supplied from an upper inlet 5A of the grain box 5 to the inside of the box. As shown in fig. 4, the grain winnowing device 35 includes a conveying screw 37 inside a cylindrical conveying box 36 extending upward in a substantially vertical posture, and a discharge portion 38 at an upper end portion, the discharge portion 38 including a raking blade for releasing grains from an upper inlet 5A of the grain box 5 into the box.

The secondary material recovered in the secondary material recovery unit 28 is fed and conveyed outward on the right side of the thresher 4 by a secondary auger, not shown. Further, a secondary material returning device 40 as a processed material conveying unit is provided, and the secondary material as the threshing processed material conveyed to the outside on the right side is returned to the inside of the threshing device 4. As shown in fig. 4, the secondary material returning device 40 includes a conveying screw 42 inside a cylindrical conveying box 41, and a discharge portion 43 at an upper end portion of the conveying box 41, as in the grain winnowing device 35, the discharge portion 43 including a raking blade for releasing the secondary material from a secondary material inlet formed in the threshing device 4 into the threshing device 4.

As shown in fig. 4, the secondary material returning device 40 is provided in the right side portion of the threshing device 4 so as to extend from a position corresponding to the secondary screw (not shown) toward the front upper side of the right side of the threshing device 4, and is inclined when viewed from the side of the machine body. In this way, the secondary objects are returned to the position as close as possible to the upstream side of the swing sorting device in the threshing device 4 in the processed object transfer direction.

As described above, the grain winnowing device 35 is provided in a substantially vertical posture from the position corresponding to the primary-matter collecting unit 27, and the secondary-matter returning device 40 is provided in an inclined posture extending forward and upward from the position corresponding to the secondary-matter collecting unit 28, and as shown in fig. 4, the grain winnowing device 35 and the secondary-matter returning device 40 intersect each other when viewed from the side of the body.

As shown in fig. 3, 4 and 7, the grain winnowing device 35 is connected and fixed at its upper part to the side wall 14 of the threshing device 4 by a pair of front and rear connecting members 44 formed of plate bodies having a substantially L-shape in plan view. One end of each of the pair of coupling members 44 is integrally coupled to the conveying box 36 of the grain winnowing device 35 by welding, and the other end is fastened and fixed to a coupling bracket 45 by fastening bolts, and the coupling bracket 45 is integrally coupled to the upper frame body 24 on the right side of the threshing device 4. In this way, the upper part of the grain winnowing device 35 is supported by the threshing device 4 through the connecting member 44. Therefore, as described below, even when the grain tank 5 is configured to be rotatable about the vertical axis, the discharge portion 38 of the grain feeder 35 is less likely to be displaced from the upper inlet 5A of the grain tank 5.

[ grain tank and discharger ]

As shown in fig. 1, a bottom screw 46 is provided at the bottom of the grain box 5 in the front-rear direction, and the grains stored in the grain box are fed out rearward. The bottom surfaces of the grain tank 5 positioned on the left and right sides of the bottom screw 46 are inclined such that the bottom screw 46 side is positioned downward. The bottom screw 46 is provided laterally outward (to the right) of the center position in the lateral width direction when viewed from the rear of the machine body. The bottom screw 46 transmits power from the engine 7 through a transmission mechanism 47 on the front side of the machine body. The transmission mechanism 47 is configured to freely connect and disconnect power transmission by operation of a clutch lever, not shown.

As shown in fig. 1, the discharger 6 includes: an elbow 6A for changing the horizontal conveying path into the vertical conveying path; and a straight tubular vertical cylinder part 6B which is connected to one end of the elbow part 6A to form a linear vertical conveying path, and a grain discharge part 6C for discharging grains is formed at the tip of the vertical cylinder part 6B. The vertical cylinder portion 6B includes a discharge screw 52 located inside a cylindrical box, and the discharge screw 52 and the bottom screw 46 are linked via a bevel gear mechanism (not shown) provided inside the elbow portion 6A.

That is, the grain fed by the bottom screw 46 is fed into the vertical cylinder 6B through the elbow 6A, and is fed by the discharge screw 52 in the vertical cylinder 6B and discharged to the outside from the grain discharge part 6C. One end of the elbow 6A is connected to a discharge cylinder (not shown) provided in the rear wall of the grain tank 5 so as to be relatively freely rotatable in a state where the elbow is prevented from falling off, and is freely swingable around the front and rear direction of the bottom screw 46 toward the rotation axis X2.

With such a support structure, the discharger 6 is supported by the grain tank 5 so as to be swingable about the rotation axis X2 of the bottom screw 46 in the front-rear direction. The discharger 6 is capable of switching between a storage posture in which the grain discharge unit 6C is oriented upward and retreats inward of the machine body and a discharge posture in which the grain discharge unit 6C is projected outward of the machine body by the operation of the hydraulic cylinder 55.

The grain tank 5 is supported by the body frame 48 so as to be swingable about the vertical axis Y between an operating posture in which the grain tank 5 is retracted into the body and grains are stored, and a maintenance posture in which the grain tank 5 is extended outward from the body. As shown in fig. 1 and 6, the grain tank 5 is provided with a square-tube-shaped rear vertical frame 49 as a rear pillar in a state of being fixed to and erected on the body frame 48 on the rear side of the grain tank 5, and the grain tank 5 is supported by the rear vertical frame 49 via a rotation support portion 50 so as to be swingable about the vertical axis Y.

When the grain tank 5 in the operating posture is switched to the maintenance posture, it is necessary to previously cut off the transmission state of the transmission mechanism 47 and separate the transmission upstream side and the transmission downstream side of the transmission mechanism 47. In addition, in a state where the discharger 6 is switched to the storage posture, the grain tank 5 is swung around the vertical axis Y, whereby the discharger 6 is also swung integrally. The swinging operation of the grain tank 5 is performed by manual work.

The grain tank 5 is provided with a fixed holder 56 at a swing end side (front side) portion of the grain tank 5 for holding the position of the grain tank 5 in an operating posture, and the grain tank 5 is provided with a switching mechanism 57 capable of switching between a state of engaging with the fixed holder 56 to hold the position and a state of releasing the engagement with the fixed holder 56 to allow the posture to be changed. The fixed holder 56 and the switching mechanism 57 constitute a position holding mechanism IH, and the position of the grain tank 5 can be held in the operating posture.

That is, the grain tank 5 can be switched to the maintenance posture by engaging the fixed holder 56 with the switching mechanism 57 to hold the position in the state of being switched to the action posture, and by releasing the position holding of the fixed holder 56.

As shown in fig. 4, a front vertical frame 58, which is a square tube and serves as a support, is provided in a space between the grain tank 5 and the threshing device 4 on the front side of the machine body in a state of being fixed to the machine body frame 48 and standing upright. A downwardly open channel-shaped bracket 59 is integrally connected to a middle portion of the upper portion side of the front-portion-side longitudinal frame 58, and a round bar-shaped fixing holder 56 is integrally connected to extend across the front and rear longitudinal portions of the bracket 59 in a front-rear direction. The fixing holder 56 is provided in a state of projecting largely forward from a longitudinal surface portion on the front side.

As shown in fig. 5, the switching mechanism 57 provided on the grain tank 5 side includes: a spring pressing type engaging mechanism 60 which is freely engaged with the fixed holder 56 in an acting posture; an operating element 61 for freely releasing the engagement state of the engagement mechanism 60; and a lever 62 for linking the operating element 61 and the engaging mechanism 60. The switching mechanism 57 can switch the grain tank 5 to the maintenance posture by operating the operating element 61 from the lateral outside of the body to release the engagement state of the engagement member (not shown).

[ exhaust pipes ]

Next, the exhaust pipe 66 through which the exhaust gas from the engine 7 flows will be described.

As shown in fig. 1 to 4, the engine 7 is provided below the driver part 3, and exhaust gas (combustion exhaust gas) discharged from the engine 7 is discharged through a muffler 67 located above the engine 7, and the exhaust gas flows through an exhaust pipe 66 and is discharged to the outside through an exhaust port 68.

The exhaust pipe 67a of the muffler 67 to which the exhaust gas from the engine 7 is supplied is configured to discharge the exhaust gas in a posture obliquely upward and leftward to the rear side. The exhaust pipe 66 is positioned higher than the supply port 69 for supplying the exhaust gas from the engine 7, and the exhaust pipe 66 extends upward through the space between the threshing device 4 and the grain tank 5.

The exhaust pipe 66 has a supply port 69 formed on the front side of the body for supplying the exhaust gas discharged from the muffler 67, and the supply port 69 surrounds the outer peripheral portion of the exhaust pipe 67a of the muffler 67 and is spaced apart from the exhaust pipe 67a in the radial direction. The exhaust pipe 66 includes: a front straight portion 70 extending linearly from the supply port 69 in a direction obliquely upward and leftward to the rear side; a curved portion 71 as a curved portion that is curved smoothly from the front straight portion 70 so as to change the posture thereof toward the rear of the body; and a rear side straight line portion 72 as a horizontal extension portion linearly extending from the curved portion 71 toward the rear of the machine body in a substantially horizontal posture. Further, an exhaust port 68 is formed at the rear end of the rear side straight portion 72.

As shown in fig. 4, the rear straight portion 72 passes through the upper portion of the body and between the threshing device 4 and the grain tank 5, and extends from the front end of the grain tank 5 in the front-rear direction to a position further rearward beyond the rear end of the grain tank 5. The rear-side straight line portion 72 extends long in the front-rear direction to a position further to the rear side than the rear end portion of the threshing device 4. Since the rear end of the grain tank 5 is located at a position closer to the front side of the body than the rear end of the threshing device 4, the exhaust duct 66 extends longer to a position closer to the rear side than the rear end of the grain tank 5 and further to a position closer to the rear side than the rear end of the threshing device 4.

In this way, the exhaust pipe 66 guides the exhaust gas from the engine 7 located below the cab 3 in the diagonally upward and leftward direction toward the rear side by the front straight line portion 70, and then guides the exhaust gas rearward and discharges the exhaust gas to the outside by the rear straight line portion 72 linearly extending toward the rear of the machine body in a substantially horizontal posture, and guides the exhaust gas in a state of passing between the cab 3 and the threshing device 4 when viewed from the front of the machine body.

As shown in fig. 3 and 4, the exhaust pipe 66 is formed of two pipe members divided into a front exhaust pipe 66A and a rear exhaust pipe 66B in the front and rear direction, and the front exhaust pipe 66A forms a front portion side of the front straight portion 70, the bent portion 71, and the rear straight portion 72, and the rear exhaust pipe 66B forms a rear portion side of the rear straight portion 72. The entire exhaust duct 66 is located at a position lower than the upper end of the thresher 4 and lower than the upper end of the grain tank 5.

The opening of the front end portion of the front side exhaust pipe 66A is a supply port 69 for supplying the exhaust gas from the engine 7, the supply port 69 is formed in a trumpet shape having a larger diameter toward the end portion side, and an outside air introducing portion 73 is formed with a gap between the exhaust pipe 67a of the muffler 67 and the inner surface of the supply port 69. In this configuration, when the exhaust gas from the engine 7 is supplied through the exhaust pipe 67a of the muffler 67, the external air is sucked through the external air introducing portion 73 by the ejector action accompanying the flow of the exhaust gas, and the exhaust gas and the external air are mixed, whereby the temperature of the exhaust gas can be reduced.

The rear exhaust pipe 66B has a larger diameter than the front exhaust pipe 66A, and a gap is formed in a radial direction between a connection portion between the rear end portion of the front exhaust pipe 66A and the front end portion of the rear exhaust pipe 66B, and an outside air introducing portion 74 utilizing an ejector action is formed similarly to the front end portion of the front exhaust pipe 66A. Therefore, even in this portion, the temperature of the exhaust gas can be reduced by mixing with the outside air.

Further, an inclined guide 75 is provided at the rear end portion of the exhaust pipe 66, and guides the exhaust gas discharged rearward from the exhaust port 68 obliquely rearward and upward. The exhaust gas is discharged toward the open space at the rear upper side of the machine body by the inclined guide body 75, and the exhaust gas is easily diffused.

Next, a support structure of the exhaust pipe 66 will be described.

As shown in fig. 8, a coupling member 76 is integrally extended obliquely upward and forward from a middle position on the upper side of the front side vertical frame 58, and a distal end portion of the coupling member 76 is coupled to a bracket 77 coupled to a middle portion of the front side straight portion 70 of the front side exhaust pipe 66A by a bolt.

Further, a groove-shaped bracket 59 is integrally connected and fixed to an upper portion side of the front-portion-side vertical frame 58, and a square-tube-shaped lateral connecting body 78 is provided in this portion so as to extend leftward. The left end of the transverse connecting body 78 is connected and fixed to a groove-shaped reinforcing member 14a of the side wall 14 of the threshing device 4 through a mounting plate 79. That is, the upper part of the front side vertical frame 58 in the vertical posture is coupled to the threshing device 4, thereby achieving the reinforcement strength. A bracket 78a provided in the lateral connecting body 78 in an integrally fixed state is connected to a bracket 80 connected to a middle portion of the rear-side straight portion 72 of the front-side exhaust pipe 66A by a bolt.

Therefore, the front exhaust pipe 66A is stably supported by the front vertical frame 58 at two locations separated in the front-rear direction.

As shown in fig. 7, the connecting member 44 positioned on the rear side of the machine body, of the pair of front and rear connecting members 44 supporting the upper portion side of the grain winnowing device 35, is connected by a bolt to a bracket 82 integrally connected to the front end portion of the rear side exhaust pipe 66B by welding.

As shown in fig. 6 and 10, a square tubular lateral connecting body 83 as a connecting member on the rear side is provided to connect an upper part of the rear side vertical frame 49 for supporting the grain tank 5 and the side wall 14 of the threshing device 4 so as to be rotatable about the vertical axis Y.

The lateral connecting member 83 is integrally provided at the right end with an attachment plate 84 having a plate surface facing forward and backward, and the attachment plate 84 is connected to a plate-shaped attachment plate 85 fixed to the rear-side vertical frame 49 by bolts. Further, an attachment plate 86 having a plate surface facing left and right is integrally provided at the left end of the lateral connecting body 83, and the attachment plate 86 is connected to a reinforcing member 14a having a groove shape in a plan view of the side wall 14 of the threshing device 4 by a bolt. Further, a bracket 87 having a substantially L-shape in front view and coupled to and fixed to the lateral coupling body 83 and a bracket 88 coupled to and fixed to the lower side of the rear exhaust pipe 66B are coupled by bolts, and the rear exhaust pipe 66B is supported by the lateral coupling body 78.

Therefore, the front portion of the rear exhaust pipe 66B is supported by the connecting member 44, and the rear portion is supported by the lateral connecting body 78, so that two portions separated in the front-rear direction are stably supported.

[ operation table ]

As shown in fig. 1 and 2, a work table 89 is provided between the threshing device 4 and the grain tank 5 in a state of being positioned above the exhaust duct 66. The work table 89 extends from a position corresponding to the front end of the threshing device 4, specifically, a position slightly closer to the rear side than the front end of the threshing device 4, to the rear end of the threshing device 4 in the front-rear direction of the threshing device 4 toward the machine body.

As shown in fig. 2 and 6, the threshing device 4 includes a work table 89 at a lateral position on the right side of the threshing device 4, which is opposite to the side where the swing fulcrum of the top plate 15 is located, and extends in the front-rear direction of the machine body along the side wall 14 of the threshing device 4. As shown in fig. 7, the work table 89 and the upper surface 24a of the upper frame 24 are set to have the same or substantially the same height, and the left end of the work table 89 is placed on and supported by the upper surface 24a of the upper frame 24.

As shown in fig. 2, the work table 89 is divided into front and rear sections and includes: a front side working platform 89A as a front side platform part, which is positioned at the front side of the grain delivery device 35; and a rear side working platform 89B as a rear side platform part, which is positioned at the rear side of the grain winnowing device 35. As shown in fig. 7 and 8, the left side portion of the front side table 89A is fastened and fixed by fastening with bolts in a state of being placed on the upper surface 24a of the upper frame body 24, and the right side portion is fastened by bolts in a state of being placed on the upper fastening portion 90 integrally fastened to the upper end portion of the front side vertical frame 58.

That is, the front side vertical frame 58 supports the portion of the work table 89 on the grain tank 5 side, and the front side vertical frame 58 functions as a frame body FL supporting the portion of the work table 89 on the grain tank 5 side.

The left side portion of the rear side table 89B is fastened and fixed by fastening bolts in a state of being placed on the upper surface 24a of the upper frame body 24, and the right side portion is supported by the body frame 48 at two locations separated in the front-rear direction.

That is, as shown in fig. 4 and 9, a support member 91 is provided at a position slightly closer to the front side than the middle position in the front-rear direction of the machine body at the right side portion of the rear side work table 89B, the support member 91 is fixedly connected to the side wall 14 of the threshing device 4 and extends upward in an inclined posture that is closer to the grain tank 5 side as it goes upward, and the upper portion of the support member 91 is fixedly connected to the right side portion of the rear side work table 89B.

The support member 91 includes: a longitudinal extension 91A extending in the up-down direction; a lower connecting portion 91B integrally connected to a lower end of the longitudinally extending portion 91A and extending in the front-rear direction; and a plate-shaped upper connecting portion 91C in a horizontal posture integrally connected to an upper end portion of the vertically extending portion 91A. The lower connecting portion 91B of the support member 91 is integrally connected and fixed to a flange connecting portion (not shown) that connects the upper portion and the lower portion of the side wall 14 of the threshing device 4. The upper connecting portion 91C of the support member 91 is connected to the lower surface side of the right side portion of the rear table 89B by a bolt.

That is, the supporting member 91 supports the portion of the work table 89 on the grain tank 5 side, and the supporting member 91 functions as a frame FL that supports the portion of the work table 89 on the grain tank 5 side.

As shown in fig. 4 and 10, a rectangular vertical support 93 is fixed to and extends upward from the left and right middle portions of the horizontal connecting body 83 as a connecting member connecting the rear vertical frame 49 and the side wall 14 of the threshing device 4 at a portion corresponding to the rear side on the right side of the rear work table 89B. A plate-shaped upper coupling body 94 in a horizontal posture is integrally connected to an upper end portion of the vertical support body 93, and the upper coupling body 94 is coupled to a lower surface side of a right portion of the rear work table 89B by a bolt.

That is, the horizontal connecting member 83 supports the portion of the work table 89 on the grain tank 5 side, and the horizontal connecting member 83 functions as a frame FL supporting the portion of the work table 89 on the grain tank 5 side.

As shown in fig. 10, a plurality of anti-slip projections 95 are formed on the upper surface of the work table 89 as anti-slip portions, so that an operator is less likely to slip while standing on the work table 89 for maintenance work or the like.

As shown in fig. 7 to 10, a reinforcing member 96 having an L-shaped cross section extending in the front-rear direction is integrally connected and fixed to a portion of the lower surface side of the work table 89 on the grain tank 5 side, and the support strength of the work table 89 is improved by reinforcing the reinforcing member 96.

As shown in fig. 9 and 10, the exhaust duct 66 is provided with a cover member 97 covering the outside of the grain tank 5. The cover member 97 is supported by the table 89. The lower portion 97a of the cover member 97 is formed as an inclined surface that is inclined toward the threshing device 4 as the lower end side approaches.

In addition, a cover member 97 is provided in a region corresponding to the rear exhaust pipe 66B of the exhaust pipe 66 so as to cover the outer right and lower outer portions of the engine body, and the cover member 97 is formed of a plate body bent in a substantially L-shape when viewed from the front of the engine body. The cover member 97 is formed of a perforated plate (punched metal plate) having a plurality of through holes punched in a plate material. By using the porous plate in this manner, moisture is discharged by falling, and therefore, the moisture can be prevented from being accumulated on the upper portion of cover member 97. Further, since the lower side portion 97a is formed as an inclined surface, dust is guided downward, and accumulation of dust on the upper portion of the cover member 97 can be avoided.

As shown in fig. 9, the upper end side of the cover member 97 is fastened and fixed to a reinforcing member 96 provided on the lower surface side of the table 89 by a bolt. The lower end side of the cover member 97 is fastened and fixed to a bracket 98 integrally coupled to the lower portion of the rear exhaust pipe 66B by a bolt.

As described above, although the grain tank 5 is supported so as to be freely changeable in posture, when the grain tank is switched to the operation posture, the exhaust duct 66 is held between the threshing device 4 and the grain tank 5, and therefore, there is little possibility of being touched by the operator. However, when the grain tank 5 is switched to the maintenance posture, the upper side of the exhaust duct 66 is covered by the work table 89, but the outer part and the lower part of the exhaust duct 66 on the right side of the body are exposed outward, and therefore the outer part and the lower part of the exhaust duct 66 on the right side of the body are covered by the cover member 97.

[ second embodiment ]

Hereinafter, a second embodiment will be described.

In this embodiment, the shape of the discharger 6, the shapes of the work table 89 and the exhaust pipe 66, the support structure, the cover structure, and the like are different from those of the first embodiment, but other structures are the same as those of the first embodiment. Therefore, the following description will be given of a configuration different from that of the first embodiment, and the description of a configuration identical to that of the first embodiment will be omitted.

[ discharger ]

The discharger 6 is explained.

As shown in fig. 11 and 12, the discharger 6 is a screw conveyor having a known structure, and includes: a vertical screw conveyor 6a for conveying upward grains which are sent out to the outside in the horizontal direction by a bottom screw 46 provided at the lower part of the grain tank 5; and a horizontal screw conveyor 6b that conveys grain in the horizontal direction from the conveying end portion of the longitudinal screw conveyor 6 a. Further, the apparatus comprises: a connecting box 6c connecting the lower part of the longitudinal screw conveyor 6a and the threshing device 4; and a connecting portion 6d which connects the vertical screw conveyor 6a and the horizontal screw conveyor 6b so as to communicate with each other in a state in which grain can be conveyed, and which is relatively rotatable around the horizontal axis at a middle portion. The discharger 6 can discharge grains to the outside from a discharge port 6e formed at the front end of the horizontal screw conveyor 6b after the grains are conveyed.

After the power from the engine 7 is transmitted to the bottom screw 46 through a transmission mechanism 47 on the front side of the machine body, the power is transmitted to the vertical screw conveyor 6a and the horizontal screw conveyor 6b through a bevel gear mechanism, not shown, and is rotationally driven, whereby grains can be conveyed.

The discharger 6 rotates the longitudinal screw conveyor 6a about the vertical axis Y by the driving of the rotary motor M, whereby the discharger 6 as a whole is free to perform a rotary operation. Further, the horizontal screw conveyor 6b is driven by the lift cylinder CY to swing up and down freely about the horizontal axis P1.

As shown in fig. 14 and 15, the vertical screw conveyor 6a is rotatably held at an intermediate position between the upper and lower positions by a rotation holding portion 116 coupled to a first support 114 and a second support 115, the first support 114 being provided upright on the body frame 48 at a left side portion, and the second support 115 being provided upright on the body frame 48 at a rear side portion. The lower end portion of the vertical screw conveyor 6a is rotatably supported by the connecting box 6 c.

[ exhaust pipes ]

In this embodiment, the exhaust duct 66 is in the same state as the first embodiment in that the exhaust port 68 is located higher than the supply port 69 through which the exhaust gas from the engine 7 is supplied, and the exhaust duct 66 extends upward through the space between the thresher 4 and the grain tank 5, but in this embodiment, the rear end portion of the exhaust duct 66 is curved upward toward the grain tank 5.

As shown in fig. 12 to 14, the rear end of the grain tank 5 is located forward of the rear end of the threshing device 4, and the rear portion of the duct portion of the exhaust duct 66 extending in the forward and rearward direction, specifically, the rear portion of the rear exhaust duct 66B of the exhaust duct 66 formed of one pipe member, is curved so as to be inclined upward toward the rear side in a side view. The rear portion 123, which is located rearward of the curved portion 122 of the exhaust duct 66, is curved toward the grain tank 5, i.e., toward the right, so as to pass through the space behind the grain tank 5 and laterally of the threshing device 4 on the grain tank 5 side.

As shown in fig. 15, the exhaust port 68 of the exhaust pipe 66 located at the rear end of the highest position is located at a position lower than the connecting portion 6d of the discharger 6, so that the exhaust pipe 66 does not interfere with the discharger 6 even if the discharger 6 is rotated about the vertical axis Y.

A fuel tank 65 is provided below the rear end portion of the exhaust pipe 66.

As shown in fig. 15, the bottom surface 5B of the grain tank 5 is formed in a substantially V-shaped inclined posture when viewed from the front-rear direction so that the position where the bottom screw 46 is located is positioned at the lowermost portion. The bottom screw 46 is provided at a position laterally outward (right side) of the center position in the lateral width direction when viewed from the rear of the machine body.

A large open space is formed below the left side of the grain tank 5, and a fuel tank 65 is provided in the space. The fuel tank 65 is formed with an inclined surface 65a at an upper portion thereof in a close state extending to a high position in the space along the inclined bottom surface 5B of the grain tank 5 as viewed in the front-rear direction. In this way, the space is effectively used, and the fuel tank 65 is increased in size and the amount of storage is increased.

A fuel filler opening 65c is formed in the upper surface 65b of the fuel tank 65, and fuel is supplied from the rear side of the body through the fuel filler opening 65 c. In the case of performing the fuel-cut operation, the exhaust pipe 66 is positioned above the operator, but as described above, the exhaust pipe 66 is bent so as to be inclined upward and rightward as it goes rearward, so that the operator can perform the operation without being conscious of the exhaust gas of the engine 7.

Next, a support structure of the exhaust pipe 66 will be described.

In this embodiment, the front exhaust pipe 66A of the exhaust pipe 66 is supported by the front vertical frame 58 in the same manner as in the first embodiment, but the coupling structure is slightly different. That is, as shown in fig. 16, 17, and 19, the coupling member 100 coupled to the bracket 77 fixed to the front portion straight portion 70 of the front portion exhaust pipe 66A is not provided to extend obliquely forward and upward as in the first embodiment, but is provided in a state of being formed in an L shape in plan view and extending in the front-rear direction of the machine body from the front portion vertical frame 58.

Further, the transverse connecting body 78 connecting the front-side vertical frame 58 and the threshing device 4 is bolted to the front-side exhaust duct 66A as in the first embodiment, but in this embodiment, the front-side exhaust duct 66A is positioned below the transverse connecting body 78 and is bolted to the bracket 117 extending downward from the transverse connecting body 78.

As shown in fig. 15, 17, and 19, the bracket 118 of the rear exhaust pipe 66B integrally connected to the front portion by welding is bolted to the connecting member 44. As shown in fig. 15, 18, and 20, the first stay 114 and the reinforcing member 14a of the side wall 14 of the threshing device 4 are coupled by a transverse coupling member 120, and a bracket 119 integrally coupled to a rear portion side portion of the rear exhaust pipe 66B by welding is bolt-coupled to a coupling member 121 fixed to the transverse coupling member 120.

[ operation table ]

In this embodiment, a notch 101 through which the exhaust pipe 66 passes is formed at the rear end portion of the table 89.

That is, as shown in fig. 14, the work table 89 is divided into a front work table 89A and a rear work table 89B in the front-rear direction while sandwiching the grain feeder 35, and a notch 101 is formed in the rear end portion of the rear work table 89B in an inclined posture such that the end edge on the grain box 5 side (right side) is inclined to the left side as it approaches the rear side.

Thus, the notch 101 allows the rear end portion of the exhaust duct 66 to bend upward toward the grain box 5 without interference. The rearmost end portion 89B1 of the rear work table 89B has a shape having a predetermined width in the left-right direction. With this configuration, while avoiding interference with the exhaust pipe 66, the operator can get on the rearmost end portion 89B1, and can perform work over a wide range in the front-rear direction. In this embodiment, the front side of the table 89 is formed slightly larger than the width of the first embodiment.

In this embodiment, a heat insulating portion 102 is provided between the work table 89 and the exhaust pipe 66.

Specifically, as shown in fig. 21, a shield plate 104 is integrally connected to the lower surface side of the table 89 by welding to form a shielded air layer 103 for heat insulation. By forming the air layer 103 for heat insulation between the shield plate 104 and the work table 89, heat from the exhaust pipe 66 is suppressed from being directly transmitted to the work table 89.

The supporting method of the work table 89 is almost the same as that of the first embodiment, but the shape of the supporting member 91 as the frame FL for supporting the grain tank 5 side of the rear side work table 89B is different. That is, the support member 91 of the first embodiment is formed by bending a vertically extending portion 91A extending in the vertical direction into a substantially L-shape when viewed from the front-rear direction, but in this embodiment, as shown in fig. 15, the support member 91 extends linearly from the side wall 14 of the threshing device 4 toward the grain tank 5 side obliquely upward.

In this embodiment, a pair of front and rear receiving members 105 are provided to receive and support the rear end edge of the front side table 89A and the front end edge of the rear side table 89B from below. As shown in fig. 16 and 17, the receiving member 105 is formed in an L-shape in side view, is connected to a pair of front and rear connecting members 44 connecting the grain winnowing device 35 and the threshing device 4, and blocks the supporting table 89, i.e., the front side table 89A and the rear side table 89B, by the horizontal plane portion 105a located at the lower portion.

[ cover structure of exhaust pipe ]

The side cover member 106 is provided similarly to the cover member 97 of the first embodiment, and covers the outside of the grain tank 5 side of the exhaust duct 66. The side cover member 106 includes: a lateral part 106a covering the lateral side of the exhaust pipe 66 on the grain tank 5 side; and a bottom portion 106b covering the lower side of the exhaust pipe 66.

As shown in fig. 13, 16, and 21, the side cover member 106 is formed by bending a non-porous metal plate material into a substantially L-shape as viewed from the front-rear direction to form a vertical surface portion and a horizontal surface portion, and instead of a porous plate, the vertical surface portion forms a lateral side portion 106a covering the lateral side of the exhaust pipe 66 on the grain box 5 side, and the horizontal surface portion forms a bottom portion 106b covering the lower side of the exhaust pipe 66.

Side cover member 106 is divided into front and rear cover portions 106A and 106B, with support member 91 interposed therebetween, front cover portion 106A extending forward to a position close to front vertical frame 58, and rear cover portion 106B extending rearward to a position just forward of a position where exhaust pipe 66 is bent upward and rightward.

As shown in fig. 13, 16, and 21, a plurality of portions of front-side cover body portion 106A and rear-side cover body portion 106B are respectively bolted to reinforcing member 96 whose upper end portion is connected to the lower surface side of table 89 and whose cross section is L-shaped. Further, a front end side portion of a corner portion 106c between the lateral side portion 106A and the bottom portion 106b of the front cover body portion 106A is bolted to a bracket 107 fixed to the front vertical frame 58, and a rear end side portion of the corner portion 106c is bolted to a bracket 108 fixed to the support member 91. The front end side portion of the corner portion 106c of the rear cover body portion 106B is bolted to a bracket 108 fixed to the support member 91.

In this embodiment, the exhaust pipe 66 is provided in a state separated from the work table 89, as compared with the configuration of the first embodiment. As shown in fig. 21, the vertical distance L1 from work table 89 to exhaust pipe 66 is set to be greater than the vertical distance L2 from exhaust pipe 66 to bottom 106b of side cover member 106.

As shown in fig. 14, the curved portion 71 as a curved portion is formed in a state of being positioned in front of the grain tank 5.

Further, a spacer member 109 is provided between the bent portion 71 of the exhaust duct 66 and the grain tank 5. As shown in fig. 16 and 19, the spacer member 109 is formed of a plate body having an L-shape in plan view, and includes: a horizontal partition 109A extending in the left-right direction along the front wall of the grain box 5; and a front-rear facing partition 109B extending in the front-rear direction along the side wall 14 of the threshing device 4. The lateral partition 109A is supported by the panel support column 110, and the front-rear direction partition 109B is supported by the front-side vertical frame 58 as a storage-section support column.

In addition, a panel stay 110 is provided in a state of being erected on the body frame 48 at a position corresponding to a front side of the grain tank 5 in a plan view and a rear end side portion of the side panel 111 as an operation panel of the cab 3. A side panel 111 is connected to an upper portion of the panel stay 110.

As shown in fig. 16, the right end of the horizontal partition portion 109A of the partition member 109 is bolted to a bracket 112 fixed to the panel support column 110, and the left end is bolted to a bracket 113 extended from the front-side vertical frame 58.

The lower part of the spacer member 109, which faces the spacer 109B in the front-rear direction, is bolted to the connecting member 100 connected to the front-side vertical frame 58, and a plurality of upper parts are bolted to the reinforcing member 96 connected to the lower surface side of the table 89.

According to the above configuration, the grain tank 5 is switched to the maintenance posture, and the open space is spaced apart from not only the linear pipe portion of the exhaust pipe 66 but also the curved portion 71, thereby facilitating maintenance work.

[ other embodiments of the first and/or second embodiment ]

(1) In the above embodiment, the exhaust pipe 66 is shown as extending to the rear side of the rear end portions of the threshing device 4 and the grain tank 5, but instead of this configuration, the rear end portion of the exhaust pipe 66 may be located to the front side of the rear end portions of the threshing device 4 and the grain tank 5.

(2) In the above embodiment, the exhaust duct 66 is shown as extending upward through the space between the threshing device 4 and the grain tank 5, but the present invention is not limited to this structure, and may be a structure extending upward directly from the engine 7 through the space between the cab 3 and the threshing device 4.

(3) In the above embodiment, the entire exhaust pipe 66 is located at a position higher than the supply port 69, but instead of this configuration, a middle portion of the duct of the exhaust pipe 66 may be located at a position lower than the supply port 69.

(4) In the above embodiment, the entire exhaust duct 66 is located at a position lower than the upper end portions of the threshing device 4 and the grain tank 5, but instead of this structure, a part of the exhaust duct 66 may be located at a position higher than the upper end portions of the threshing device 4 and the grain tank 5.

In the above-described embodiment, the entire exhaust pipe 66 is located at a position higher than the supply port 69, but instead of this, a structure may be employed in which a part of the exhaust pipe 66 is located at a position lower than the supply port 69.

(5) In the above embodiment, the exhaust pipe 66 has a structure in which a bent portion is formed at a middle portion of the duct and a horizontally extending portion extending in the horizontal direction is formed, but instead of this structure, the exhaust pipe 66 may be provided so as to extend linearly upward from the supply port 69 to the exhaust port 68.

(6) In the above embodiment, the exhaust pipe 66 is supported by the connecting member for supporting the grain winnowing device 35, the connecting member for supporting the grain tank 5, the support, and the like, but instead of this, a structure including a dedicated support member for supporting the exhaust pipe may be employed.

(7) In the above embodiment, the cover members 97 and 106 covering the outside of the grain tank 5 side of the exhaust duct 66 are formed of plate bodies bent into a substantially L shape when viewed from the front of the machine body, but instead of this, as shown in fig. 22, a cover member 97A having a substantially arc shape when viewed from the front of the machine body may be formed so as to cover the outside of the grain tank 5 side of the exhaust duct 66. The cover member 97A is coupled and supported to a bracket 99 provided on the outer peripheral portion of the exhaust pipe 66.

(8) In the above embodiment, the configuration in which the grain box 5 is provided as the grain storage unit is shown, but instead of this configuration, a configuration in which the grain storage unit is provided with a storage hopper for bag collection may be adopted.

(9) In the second embodiment, the rear end portion of the exhaust duct 66 is directed to change its direction in a state of being smoothly bent upward toward the grain tank 5 side, but instead of the bent structure, a structure in which the direction is changed in a bent state may be employed.

(10) In the second embodiment, as the heat insulating portion 102 provided between the work table 89 and the exhaust pipe 66, a structure is adopted in which a shield plate 104 for forming a shielded air layer 103 for heat insulation is integrally connected to the lower surface side of the work table 89 by welding, but instead of this structure, a structure may be adopted in which a heat insulating material is provided as the heat insulating portion on the lower surface side of the work table in a fixed position. For example, the heat insulating material may be fixed by fastening or screwing with a fastening member. Alternatively, a heat insulator may be inserted into the air layer 103 in the above embodiment.

(11) In the above embodiment, the work table 89 is shown as extending from a portion located slightly more toward the rear side than the front end portion of the threshing device 4, which is a position corresponding to the front end portion of the threshing device 4, to the rear end portion of the threshing device 4, but instead of this structure, the following structures (11-1) to (11-4) and the like may be used.

(11-1) the work table 89 is provided to extend from the same front-rear position as the front end portion of the threshing device 4 as the position corresponding to the front end portion of the threshing device 4 to the rear end portion of the threshing device 4.

(11-2) the work table 89 is provided to extend from a position closer to the front side of the machine body than the front end of the threshing device 4, which is a position corresponding to the front end of the threshing device 4, to the rear end of the threshing device 4.

(11-3) the work table 89 extends from a position corresponding to the front end of the threshing device 4 to a position closer to the front side than the rear end of the threshing device 4, for example, to a position corresponding to the rear end of the grain storage 5.

(11-4) the work table 89 extends from a position corresponding to the front end of the threshing device 4 to a position closer to the front side than the rear end of the threshing device 4 and the rear end of the grain storage 5.

(12) In the above embodiment, the frame FL for supporting other members is used to support the portion of the work table 89 on the grain storage unit 5 side, but a dedicated frame for supporting the portion of the work table 89 on the grain storage unit 5 side may be provided.

(13) In the above embodiment, the threshing device side portion of the work table 89 is supported by the threshing device 4, but a dedicated frame for supporting the threshing device side portion of the work table 89 may be provided.

(14) In the above embodiment, the exhaust pipe 66 is provided below the work table 89, but the exhaust pipe 66 may be provided at another location that is located below the machine body and is separate from the work table 89.

(15) In the above embodiment, the configuration in which the plurality of projections 95 are formed as the anti-slip portions on the upper surface of the work table 89 is shown, but the anti-slip portions are not limited to the projections, and various embodiments such as a configuration in which the surface is made rough and is hard to slip, or a configuration in which a plurality of belt plates are integrally connected to each other so as to be arranged at intervals between the frame members may be adopted.

(16) In the above embodiment, the table 89 is divided into the front and rear portions 89A and 89B, but instead of this, it may be integrally formed along the front and rear direction. In this case, since the grain feeder 35 is formed long in the vertical direction, the work table 89 needs to be provided so as not to interfere with the grain feeder 35 by being laterally displaced from the grain feeder 35.

(17) In the above embodiment, the cover member 97 covering the outside of the grain tank 5 side of the exhaust pipe 66 is formed of a plate body bent in a substantially L shape when viewed from the front of the machine body, but instead of this structure, as shown in fig. 22, the cover member 97 may be formed in a substantially arc shape when viewed from the front of the machine body so as to cover the outside of the grain tank 5 side of the exhaust pipe 66. The cover member 97 is coupled and supported to a bracket 99 provided on the outer periphery of the exhaust pipe 66.

(18) In the second embodiment, the notch 101 through which the exhaust pipe 66 passes is formed at the rear end portion of the table 89, but instead of the notch, an opening through which the exhaust pipe 66 passes may be formed.

(19) In the above-described embodiment, the configuration in which the present invention is applied to the general type combine is shown, but the present invention is not limited to the general type combine and can be applied to a semi-feeding type (culm-head charging type) combine.

[ third embodiment ]

Hereinafter, a third embodiment will be described.

[ integral structure ]

Fig. 23 and 24 show a general combine harvester as an example of the combine harvester.

This general type combine includes a driving unit B and a pre-harvest treatment device C at the front of a traveling machine body a traveling through a pair of left and right crawler traveling devices 201, and further includes a full-feed type threshing device D into which grain stalks harvested by the pre-harvest treatment device C are fed, and a grain tank E (corresponding to a grain storage unit) for storing grains supplied from the threshing device D.

The grain tank E is supported so as to be freely switched between a work posture (posture shown by a solid line in fig. 24) in which the grain tank E is stored in the travel machine body a and an inspection posture (posture shown by a phantom line in fig. 24) in which the grain tank E is laterally extended from the travel machine body a by turning around an upper and lower axial center Y of a longitudinal posture at a rear position of the travel machine body a. A discharger F is provided on the rear surface of the grain box E. The discharger F is provided so as to be swingable in a fluctuating manner about a swing axis X in the front-rear direction, and is capable of switching between a storage posture in which the discharge-side end portion is directed upward and a discharge posture in which the discharge-side end portion is directed outward. Further, a fuel tank 204 is provided on a vehicle body frame 210 corresponding to a portion between the grain tank E and the thresher D at a rear end portion of the travel machine body a.

An engine 203 is disposed below the driver seat 202 of the driver section B, and a transmission (not shown) is disposed at the center of the front portion of the travel machine body a to transmit the driving force from the engine 203 to the right and left crawler 201. The transmission includes a continuously variable transmission device that continuously changes the speed of the driving force from the engine 203, and includes a steering clutch (not shown) that is connected to and disconnected from the driving force transmitted to the left and right crawler travel devices 201.

The pre-harvest treatment device C rakes the ear tips of the planted grain stalks by the rotation of the raking reel 205, and cuts off the roots of the grain stalks by the cutter 206. The harvested straw (harvested straw) is fed laterally by the lateral feed screw 207 and collected near the inlet of the feeder 208, and the whole straw is carried rearward by the feeder 208 and fed into the threshing device D. The pre-harvest treatment apparatus C is vertically swingable about a transverse axis (not shown) at the rear end of the feeder 208. A transmission device (not shown) such as a hydraulic cylinder for vertically swinging is provided, and the height of the grain or straw can be adjusted by setting the swinging amount by the operation of the transmission device.

[ riding driving part ]

The driving unit B includes a box-shaped engine cover 211 covering an upper side of the engine 203, and a driving seat 202 is provided on an upper surface of the engine cover 211. An intake box 211A is formed on the outer side of the engine cover 211, and an intake part 211B for sucking cooling air and having a dust screen is formed on the outer surface side of the intake box 211A.

A console 212 is provided upright on the front side of the driver seat 202, and a steering lever 213 is provided on the upper surface side of the console 212, and the steering lever 213 serves as both an operation member for steering the traveling machine body a and an operation member for raising and lowering the pre-harvest treatment apparatus C.

As shown in fig. 24, a side panel 214 is provided on the left side of the driver seat 202 and extends rearward from the left lateral end of the console 212. A main shift lever 215A and an auxiliary shift lever 215B are provided as shift operation members 215 for controlling the traveling speed of the traveling machine body a on the upper surface of the front end portion of the side plate 214.

Further, a threshing clutch lever 216A and a harvesting clutch lever 216B are provided on the upper surface side of the side plate 214 in a left-right aligned state at positions rearward of the shift operation element 215. The threshing clutch lever 216A and the harvesting clutch lever 216B are configured to perform an operation of turning on and off a threshing clutch (not shown) of the threshing device D by a forward and backward swinging operation of the threshing clutch lever 216A, and to perform an operation of turning on and off a harvesting clutch (not shown) of the pre-harvesting treatment device C by a forward and backward swinging operation of the harvesting clutch lever 216B.

Further, an operation box 217 equipped with a discharge clutch lever 218 is provided on the rear side surface plate 214 of the threshing clutch lever 216A and the harvesting clutch lever 216B. The discharge clutch lever 218 is an operation member for performing an on/off operation of a discharge clutch G described below between a state in which grain discharge by the discharger F is possible and a state in which grain discharge is stopped.

The steering rod 213 provided on the upper surface side of the console 212 is configured to be maintained in a neutral posture in a non-operated state, and controls a steering clutch incorporated in the transmission by swinging operation in the left-right direction based on the neutral posture, thereby achieving steering (turning) of the travel machine body a. The above-described transmission device is controlled by operating the steering lever 213 in the front-rear direction, and the pre-harvest treatment device C is lifted and lowered.

The shift operation member 215 changes the traveling speed by shifting the continuously variable transmission in the forward and backward directions. The threshing clutch lever 216A performs an operation of connecting/disconnecting a threshing clutch, which connects/disconnects power to/from the threshing device D, by operating in the front-rear direction. The reap clutch lever 216B performs an on/off operation of a reap clutch that performs power on/off of the reap pre-processing device C by an operation in the front-rear direction.

As shown in fig. 33, the discharge clutch G is provided, and the discharge clutch lever 218 is connected to a discharge system for transmitting the driving force from the engine 203 to the grain tank E to operate the discharge clutch G. According to such a configuration, the discharge clutch lever 218 is operated to the communication position to communicate the discharge clutch G, so that the driving force from the engine 203 is transmitted to the bottom screw 221 of the grain box E, and the discharger F is driven, thereby discharging the grains from the grain box E.

[ threshing device ]

The threshing device D is provided with: an axial flow type threshing cylinder (not shown) that is rotationally driven around the axis of the posture in the front-rear direction of the traveling machine body a so as to thresh the harvested straws supplied to the threshing chamber; and a sorting processing device (not shown) for sorting grains from the processed matter obtained by the threshing processing.

In this sorting apparatus, among the grains to be sorted, the primary material is supplied to the grain tank E by the winnowing device 209, the secondary material is returned to the threshing chamber (not shown) in which the threshing cylinder rotates by the secondary returning device 219, and straw chips and the like other than the grains fall and are released from the rear portion of the sorting apparatus toward the rear of the traveling machine body a.

[ grain case ]

As shown in fig. 23, 27, and 28, the grain box E includes a bottom screw 221 at the bottom of the box main body 220, and feeds out grains stored in the box main body 220 toward the rear. Most of the bottom wall 220A of the box main body 220 is formed as an inclined surface that is lower at a position closer to the outside in the left-right direction so that the stored grains flow downward toward the outside of the travel machine body a in the work posture stored in the travel machine body a. With such a configuration, the position of the bottom screw 221 is offset to the outside of the travel machine body a.

As described above, the portion including the bottom wall 220A corresponds to the inclined portion that is narrowed downward in the lower portion of the grain box E, the bottom wall 220A is formed as the inclined surface that is lower as the position becomes closer to the outer side in the left-right direction so that the grains flow downward toward the outer side of the traveling machine body a to guide the grains toward the bottom screw 221, and the bottom screw 221 is provided in the bottom portion in a state of being biased toward the outer vicinity of the traveling machine body a.

As shown in fig. 33, the front end of the screw shaft 221A of the bottom screw 221 is provided to protrude forward from the front wall 220f of the box main body 220, and a horizontally oriented intermediate shaft 222 is coupled to the protruding portion via a bevel gear 221B. The engine power is transmitted to the intermediate shaft 222 via the output shaft 203a of the engine 203, the belt transmission 223, and the input shaft 224. The intermediate shaft 222 is provided along the front wall 220f of the tank main body 220 at the lower front portion of the tank main body 220.

The discharge clutch G is of a belt-tensioned type, and switches the connection/disconnection of the driving force to/from the belt transmission mechanism 223 by switching between a belt-tensioned state and a belt-relaxed state, and the belt transmission mechanism 223 transmits the driving force from the engine 203 to the intermediate shaft 222. The discharge clutch lever 218 can adjust a belt tension of the belt transmission mechanism 223, and by adjusting the belt tension, power can be turned on/off.

The rear end of the screw shaft 221A of the bottom screw 221 projects rearward from the rear wall 220r of the box main body 220, and the axis of the screw shaft 221A coincides with the swing axis X of the discharger F.

That is, a discharge cylinder 225 is provided in a state where the rear wall 220r of the box main body 220 protrudes rearward, and the discharge cylinder 225 includes a grain discharge port 220B for conveying grains conveyed from the bottom screw 221 to the discharger F. The discharge cylinder portion 225 is integrally connected and fixed to a rear reinforcing plate 227 for reinforcing the periphery of the grain discharge opening 220B, and the rear reinforcing plate 227 is attached to the rear wall 220 r. The center axis of the discharge cylinder 225 is arranged to coincide with the axis of the screw shaft 221A and the swing axis X of the tripper F, and the discharge cylinder 225 is fitted and connected to an elbow 230 described below, whereby the entire tripper F including the elbow 230 can swing around the swing axis X.

The rear side of the grain tank E, which can swing around the vertical axis Y, is supported by a support frame 250 described below. As shown by the phantom lines in fig. 24 and 25, a known guide roller 226 (corresponding to a placement support portion) is provided on the front side separated from the vertical axis Y on the bottom side of the box body 220 so as to be rotatable on the vehicle body frame 210, and the weight of the front side when the grain box E is stored in the working posture of the travel machine body a is shared and supported by the guide roller 226.

[ discharger ]

The discharger F includes an elbow 230 at an upstream side end of the discharger F in the grain conveying direction, and a straight tubular vertical cylinder 231 is connected to a downstream side of the elbow 230 in the grain conveying direction, thereby forming a linear vertical conveying path R.

The elbow 230 has: an introduction cylinder part 230A in a posture of being fitted to the discharge cylinder part 225 on the grain box E side from the rear; and an outlet tube part 230B connected to the inlet tube part 230A in an orthogonal posture, and the vertical tube part 231 is connected to the outlet tube part 230B.

The vertical tube 231 includes therein: a straight-pipe-shaped discharge cylinder (not shown) for forming a linear vertical transport path R; and a discharge screw 235 disposed inside the discharge tube, having a grain discharge port 236 at a discharge-side end, and guiding the grains in a direction orthogonal to the longitudinal direction of the discharge tube.

The discharger F having such a configuration can freely switch between a storage posture in which the discharge-side end portion is directed upward and a discharge posture in which the discharge-side end portion is directed outward.

As shown in fig. 26, in the storage posture, the central axis Z (corresponding to the tube axis) of the vertical tube portion 231 is slightly inclined inward of the travel machine body a with respect to the vertical line. Thus, the vertical tube 231 assumes a posture inclined to the left side in the rear view. In the discharge posture, the central axis Z of the vertical tube 231 is slightly upward from the horizontal line, and the vertical tube 231 is inclined to rise rightward in the rear view.

The discharge screw 235 includes a screw shaft 235A, and the screw shaft 235A is rotatably supported about the central axis Z.

A part of the screw shaft 221A of the bottom screw 221 is inserted into the introduction tube portion 230A of the elbow 230, and a part of the discharge screw 235 is inserted into the discharge tube portion 230B of the elbow 230. A bevel gear mechanism (not shown) having a pair of bevel gears rotating about axes orthogonal to each other is provided inside the elbow portion 230 so that the driving force of the screw shaft 221A is transmitted to the screw shaft 235A of the discharge screw 235.

With such a transmission structure, the driving force of the bottom screw 221 can be transmitted to the discharge screw 235 via the bevel gear mechanism of the elbow 230. The grains in the grain box E can be transported from the bottom auger 221 to the discharge auger 235, and discharged from the grain discharge port 236 at the end of the transport of the discharger F.

In the discharger F, the rotation direction of the bottom auger 221 is set to rotate leftward (counterclockwise) when the grain box E is viewed from the rear. Therefore, when the grain is discharged from the discharger F, a torque in a lifting direction, which is a direction in which the discharger F is oriented in the storage posture, acts on the vertical cylinder 231 of the discharger F.

[ supporting Structure ]

A supporting structure for supporting the grain tank E and the discharger F will be described.

The support structure is provided with: a support frame 250 provided upright on the vehicle body frame 210; and a mounting frame 240 installed at the grain box E.

[ supporting frame ]

As shown in fig. 26 to 30, the support frame 250 includes: a vertical column portion 251 formed in a rectangular column shape by a square tube material; an attachment plate 252 attached to the vehicle body frame 210 provided on the lower end side; a placement portion 253 provided at a lower portion of the vertical columnar portion 251 in the middle position in the vertical direction; and an embracing support portion 255 provided at an upper end portion of the vertical columnar portion 251.

The vertical columnar portion 251 is fixed to the vehicle body frame 210 in an upright posture by bolting the lower end attachment plate 252 to the vehicle body frame 210.

The mounting portion 253 provided in a portion of the vertical columnar portion 251 closer to the lower portion includes: a support bracket 253A made of a downwardly open trough-like member; and an annular support body 253B provided on the upper surface side of the support bracket 253A, and the support bracket 253A is welded to the right lateral side surface of the vertical columnar portion 251 and is set in a state of protruding to the right lateral side. The annular support body 253B is welded and fixed to the upper surface side of the support bracket 253A. The upper surface of the support bracket 253A and the annular support body 253B constitute a mounting portion 253, and the mounting portion 253 rotatably supports the below-described mounting frame 240 from below. That is, in a state where the lower end portion of the attachment frame 240 is placed on the upper surface side of the support bracket 253A, the lower end portion of the attachment frame 240 is fitted to the annular support body 253B, and the attachment frame 240 is supported from below and is configured to be rotatable.

As shown in fig. 27 to 31, in the embracing support portion 255 provided at the upper end portion of the vertical columnar portion 251, mounting pieces 255a, 255a are fixed by welding to both front and rear surfaces near the upper end portion in the rightward lateral outward direction, and an embracing metal fitting 256 constituted by a pair of left and right first embracing bodies 256A and second embracing bodies 256B is bolted to the mounting pieces 255a, 255 a.

The first hoop body 256A includes: a first holding plate 256Aa that contacts the outer peripheral surface of the attachment frame 240 on the inner side of the machine body; and a connecting plate 256Ab connecting front and rear ends of the first holding plate 256Aa to the mounting pieces 255a, 255 a. The second loop member 256B includes a second holding plate 256Ba, and is in contact with the outer peripheral surface of the attachment frame 240 on the outside of the machine body at a position facing the first holding plate 256Aa, and both front and rear end portions thereof are bolted to the first holding plate 256 Aa.

The first holding plate 256Aa and the second holding plate 256Ba are formed in an arc-like curved shape in which portions contacting the outer peripheral surface of the attachment frame 240 are recessed along the outer peripheral surface of the attachment frame 240. In the surrounding state of the surrounding support 255 configured as described above, the mounting frame 240 is allowed to rotate relative to each other about the vertical axis Y, and the horizontal movement of the mounting frame 240 is restricted.

Another mounting plate 257 is welded and fixed to an upper end portion of the vertical columnar portion 251, toward a left lateral direction opposite to a right lateral direction outside to which the embracing support portion 255 is attached, that is, toward an inner side of the machine body, and the mounting plate 257 is bolted to the lateral frame 258.

As shown in fig. 28, 30, and 31, the mounting plate 257 is formed by bending a plate material into a groove shape on the upper side and has a plate portion shape extending further downward from the lower end side of the groove-shaped portion. The left and right end portions of the plate material are welded and fixed to the left side surface of the vertical columnar portion 251 in a state of contact, instead of the plate surface of the bent plate material facing the front-rear direction. In this manner, the mounting plate 257 is bent to enhance the shape holding strength of the mounting plate 257 itself, and the welding line length to the vertical columnar portion 251 is secured to be firmly attached.

One end of a transverse frame 258 is bolted to the plate surface of the mounting plate 257 in the front-rear direction, and the other end of the transverse frame 258 is bolted to a reinforcing rib member D1 fixed to a transverse wall D2 of the threshing device D. Thus, the vertical columnar portion 251 is fixed to the body frame 210 at the lower end side and is connected and fixed to the threshing device D at the upper end side.

[ mounting frame ]

The mounting frame 240 supported rotatably about the vertical axis Y on the support frame 250 provided upright on the vehicle body frame 210 is formed of a cylindrical member (corresponding to a cylindrical body having a circular cross section) having a diameter equal to the side length of the square tubular member forming the vertical columnar portion 251 of the support frame 250.

Three portions of the attachment frame 240, which are near the upper end, near the lower end, and in the middle portion in the vertical direction, which are closer to the upper end, are connected and fixed to the rear wall 220r of the grain box E by attachment brackets 241, 242, and 243.

Each of the mounting brackets 241, 242, and 243 is formed of a rectangular tubular member having a length in the left-right direction longer than the diameter of the mounting frame 240, and the mounting frame 240 is integrally fixed by welding in a state of penetrating the mounting brackets 241, 242, and 243 vertically.

Further, a portion between the attachment bracket 241 near the upper end portion of the attachment frame 240 and the attachment bracket 242 closer to the upper end side in the middle portion is rotatably supported by an embracing support portion 255 provided in the upper end portion of the support frame 250.

As shown in fig. 32 (B), the lower end of the mounting frame 240 projects downward by a predetermined length d1 from the lower surface of the mounting bracket 243 near the lower end, and the projecting portion 240a is fitted to the annular support 253B provided on the mounting portion 253 of the support frame 250.

At this time, in a state where the lower end surface of the attachment frame 240 slightly floats from the upper surface of the support bracket 253A of the mounting portion 253, the lower surface of the attachment bracket 243 near the lower end portion comes into contact with the upper end edge of the annular support body 253B, and the attachment frame 240 is supported from the lower side.

A predetermined length d1 of a projection 240a projecting downward from the lower surface of the mounting bracket 243 at the lower end of the mounting frame 240 is set as follows. That is, as shown in fig. 32 (a), the lower end surface of the attachment frame 240 is set to a size not to contact the upper surface of the support bracket 253A in a state where the protruding portion 240A is fitted to the annular support body 253B of the support bracket 253A provided in the mounting portion 253, and when the grain box E is lifted up and the lower end portion of the attachment frame 240 is taken out from the annular support body 253B, the upper portion of the outer peripheral surface of the introduction cylinder portion 230A of the discharger F does not contact the lower end edge of the support bracket 253A.

That is, the fitting portion between the projecting portion 240A and the annular support body 253B is set to be shorter than the interval between the upper portion of the outer peripheral surface of the introduction cylinder portion 230A of the ejector F and the lower end edge of the support bracket 253A in the vertical direction in the state where the grain box E is set at the predetermined position, and when the grain box E is attached to and detached from the vehicle body frame 210, the introduction cylinder portion 230A of the ejector F can be prevented from coming into contact with and being damaged by the lower end edge of the support bracket 253A.

As shown in fig. 32 (a), on the upper side of the mounting frame 240, the second holding plate 256Ba surrounding the metal fitting 256 is connected to the first holding plate 256Aa in a state where the projecting portion 240a is fitted in the annular support body 253B. When the grain tank E is lifted up and the lower end portion of the attachment frame 240 is taken out from the annular support body 253B, the second holding plate 256Ba is detached from the first holding plate 256Aa in advance. By doing so, the mounting bracket 242 can be raised to a position where it does not contact the first holding plate 256Aa of the embracing metal fitting 256. As shown in fig. 32 (B), in this state, the lower end portion of the mounting frame 240 is taken out from the annular support 253B.

The mounting frame 240 is rotatably supported by being fitted to the annular support body 253B of the mounting portion 253 on the lower side and rotatably supported by the embracing support portion 255 on the upper side, so that the central axis of the mounting frame 240 formed of a cylindrical member forms the upper and lower axis Y which is the rotation center of the grain box E.

That is, the attachment frame 240 is integrally formed with the grain tank E via the attachment brackets 241, 242, and 243, and the area center of the attachment frame 240 formed of a cylindrical member in a plan view coincides with the rotation center of the grain tank E and forms the vertical axis Y.

The mounting frame 240 between the mounting bracket 243 near the lower end portion and the mounting bracket 242 at the middle portion is provided with a receiving portion 244 for stably maintaining the receiving posture of the discharger F.

The receiving portion 244 is welded and fixed with an attachment plate 245, the attachment plate 245 includes a plate surface inclined so as to be higher on the right-lateral-outward side than a plane orthogonal to the vertical axis Y as the center axis of the attachment frame 240, and a receiving plate 246 bolted to the attachment plate 245 extends rearward. The receiving plate 246 has an arc-shaped curved recess 246A, and the curved recess 246A is along the outer peripheral surface shape of the vertical tube portion 231 of the discharger F. Therefore, when the tripper F is in the storage posture, the outer peripheral surface of the tripper F on the inner side of the body is in contact with the curved concave portion 246A of the receiving plate 246 in a fitted state, and the tripper F can be prevented from further falling toward the inner side of the body from the storage posture and moving in the front-rear direction.

As shown in fig. 27 to 31, a groove-shaped fixed-side stopper piece 242A opened on the right lateral side is welded and fixed to the right lateral side of the intermediate attachment bracket 242. A movable-side stopper piece 231A having an L-shaped cross section is welded and fixed to an intermediate portion of the vertical tube portion 231 of the ejector F, and the movable-side stopper piece 231A overlaps with a portion of the upper side of the fixed-side stopper piece 242A in the storage posture of the ejector F. The fixed-side stopper piece 242A on the attachment bracket 242 side is formed with two through holes 242Aa, 242Ab spaced apart in the front-rear direction, and the movable-side stopper piece 231A on the vertical tube portion 231 side is formed with one through hole 231Aa at a position that coincides with one of the two through holes 242Aa, 242Ab of the fixed-side stopper piece 242A.

Therefore, as shown in fig. 30, when one stopper pin 247 is inserted through one of the through holes 242Aa and 242Ab of the two portions of the fixed-side stopper piece 242A on the mounting bracket 242 side and one through hole 231Aa of the movable-side stopper piece 231A formed on the vertical tube 231 side in the storage posture of the ejector F (fig. 30 shows a state where the stopper pin 247 is inserted through the through hole 242 Aa), the locked state in which the ejector F is fixed to the mounting frame 240 can be maintained in a posture in which the vertical tube 231 of the ejector F is received in the receiving portion 244. The stopper pin 247, the movable-side stopper piece 231A, and the fixed-side stopper piece 242A constitute a lock mechanism for restricting the position of the discharger F.

When the stopper pin 247 is removed, the position of the discharger F can be released from the position restriction by the lock mechanism. Further, by inserting the stopper pin 247 taken out into the other through hole 242Ab of the fixed-side stopper piece 242A located at a position not overlapping with the movable-side stopper piece 231A in fig. 30, the ejector F can be freely operated to swing up and down while the stopper pin 247 taken out when the locked state is released is held in the machine body.

As shown in fig. 26, since the attachment frame 240 faces the support frame 250 and the attachment frame 240 is disposed above the placement portion 253 extending toward the upper side of the introduction cylinder portion 230A of the discharger F, the attachment frame 240 is in a state of almost overlapping the vertical cylinder portion 231 in the storage posture in the rear view. This enables the attachment frame 240 and the tripper F to approach or overlap in the width direction of the travel machine body a, and thus saves space in the left-right direction for disposing them.

As shown in fig. 23 and 27, a work lamp 249 is attached to the upper end of the attachment frame 240, and widely projects to the right and laterally outward of the travel machine body a when the grain tank E is present at a work position on the travel machine body a.

Since the work lamp 249 is provided at this position, when the grain discharging work is performed in the discharging posture in which the tripper F is laid down laterally outward, the discharging target portion from the tripper F can be illuminated to obtain a good working environment.

As shown in fig. 28 and 32, an alarm buzzer 259 is attached to the attachment plate 257 for connecting the lateral frame 258 to the upper portion of the attachment frame 240, and notifies the traveling rearward state of the travel machine body a.

[ Oscillating drive ]

A swing driving device for swinging the discharger F up and down will be described.

The swing drive means is constituted by a double-acting hydraulic cylinder 260 driven telescopically. As shown in fig. 26 to 28, the hydraulic cylinder 260 is provided across the grain tank E having the mounting frame 240 rotatably supported by the support frame 250 and the discharger F.

That is, the upper end of the cylinder 261 on one end side of the hydraulic cylinder 260 is connected to the grain tank E side, and the lower end of the piston rod 262 on the other end side is connected to the discharger F side. Hereinafter, the end on the cylinder 261 side is referred to as a first end, and the end on the piston rod 262 side is referred to as a second end.

The first end of the cylinder 261 is connected to a mounting bracket 242 of an intermediate portion extending rearward from the rear wall 220r of the grain tank E. The mounting bracket 242 has a groove-shaped coupling member 248 that is open downward and welded and fixed to the lower surface side thereof, and is coupled to be swingable around a coupling pin 263 provided in the front-rear direction of the coupling member 248.

A second end portion, which is an end portion of the piston rod 262 located on the other end side of the hydraulic cylinder 260, is coupled to a coupling bracket 239 provided on the vertical tube portion 231 of the discharger F so as to be swingable about a coupling pin 264. The coupling bracket 239 is fitted to the outer surface of the vertical tube 231 of the discharger F adjacent to the elbow 230, and is coupled to a welded and fixed cylindrical reinforcement member 238.

The first end of the hydraulic cylinder 260 thus provided, which is connected to the attachment frame 240, is located at an upper position and is located on the inner side of the travel machine body a; the second end connected to the tripper F is located at a lower position and is located at a position more laterally outward of the travel machine body a than the first end.

As shown in fig. 27, the vertical axis Y of the attachment frame 240 erected on the rear side of the grain tank E in side view is parallel to the central axis Z of the vertical cylinder 231 of the discharger F. The discharger F is spaced apart from the attachment frame 240 by a predetermined small interval in the front-rear direction, and the hydraulic cylinder 260 is disposed in a space having the small interval and has a center line CL parallel to the upper and lower axial centers Y of the attachment frame 240 and the center axis Z of the vertical cylinder portion 231 of the discharger F in a side view.

That is, the coupling member 248 on the mounting frame 240 side is located behind the rear end edge of the outer peripheral surface of the mounting frame 240 in a side view, and the coupling bracket 239 on the discharger F side is located ahead of the front end edge of the outer peripheral edge of the longitudinal tube portion 231 of the discharger F in a side view. The center line CL of the hydraulic cylinder 260 connected to the connecting member 248 and the connecting bracket 239 is attached to be parallel or almost parallel to the vertical axis Y and the center axis Z in a side view.

The swing axis X of the discharger F is orthogonal to the vertical axis Y, the central axis Z, and the central line CL. Therefore, when the discharger F swings up and down along with the expansion and contraction of the hydraulic cylinder 260, the hydraulic cylinder 260 can be prevented from interfering with the discharger F or the attachment frame 240.

As shown in fig. 26 and 28, in the rear view, the vertical tube part 231 of the tripper F is received in the receiving part 244 with the central axis Z slightly inclined inward of the travel machine body a in the storage posture of the tripper F with respect to the vertical axis Y of the attachment frame 240 provided upright on the rear side of the grain tank E.

In this storage attitude, the center line CL of the hydraulic cylinder 260 is disposed in a state of being inclined more toward the inside of the travel machine body a than the inclination of the center axis Z of the vertical cylinder portion 231 of the tripper F.

That is, the coupling member 248 of the mounting frame 240 side to which the first end portion of the hydraulic cylinder 260 is coupled is positioned on the lower surface side of the mounting bracket 242 of the intermediate portion coupled to the mounting frame 240 in the rear view, and the coupling pin 263 is positioned in the vicinity of the vertical axis Y of the mounting frame 240. The coupling bracket 239 on the side of the tripper F to which the second end portion of the hydraulic cylinder 260 is coupled projects rightward from the outer peripheral surface of the tripper F in a rear view, and the coupling pin 264 is positioned rightward from the right end edge of the outer peripheral surface of the tripper F.

Further, the swing axis X of the tripper F is located at a position offset to the outside in the lateral direction of the travel machine body a from the vertical axis Y of the attachment frame 240, and the tripper F is inclined inward of the machine body in the storage posture, but the inclination angle of the central axis Z of the vertical tube 231 of the tripper F with respect to the vertical line is smaller than the inclination angle of the hydraulic cylinder 260. As a result, the inclination of the hydraulic cylinder 260 is larger than the inclination of the tripper F supported by the receiving portion 244.

The tilting of the hydraulic cylinder 260 facilitates: the extension and contraction directions of the hydraulic cylinder 260 are set to be as close as possible to the force line in the direction perpendicular to the central axis Z of the vertical cylinder 231 of the tripper F, so that the tripper F can smoothly swing up and down. Further, since the coupling member 248 that projects rightward from the right end edge of the outer peripheral surface of the attachment frame 240 and couples the first end portion of the hydraulic cylinder 260 is provided, it is effective in shortening the length of the hydraulic cylinder 260 as much as possible, for example, compared to a case where the coupling member 248 projects leftward from the left end edge of the outer peripheral surface of the attachment frame 240.

The second end of the hydraulic cylinder 260 is coupled to a coupling bracket 239, the coupling bracket 239 is attached to a cylindrical reinforcement member 238, and the cylindrical reinforcement member 238 is externally fitted to an adjacent portion of the longitudinal tube portion 231 of the discharger F to the elbow 230. By connecting the vertical cylinder 231 at the position closest to the elbow 230, the turning radius of the movement locus of the second end portion around the pivot axis X of the tripper F is reduced, which is effective in reducing the amount of expansion and contraction of the hydraulic cylinder 260.

As shown in fig. 26, the coupling pin 264 at the second end of the hydraulic cylinder 260 disposed in this way is located laterally outside the travel machine body a with respect to a line segment L1 that couples the coupling pin 263 at the first end side and the swing axis X of the tripper F. Therefore, the hydraulic cylinder 260 contracts maximally in the storage posture and expands maximally in the discharge posture.

In the process of moving the tripper F from the discharge posture to the storage posture, the tripper F moves from a state of standing upright on a vertical line of the swing axis X of the tripper F to a position on a vertical line of the swing axis X to a storage posture of slightly inclining inward of the travel machine body a.

In the hydraulic cylinder 260 for swing-driving the tripper F, the pressure oil is supplied to the oil chamber below the cylinder 261 in the upward swing stroke from the discharge posture to the vertical line on the swing axis X. At the same time, the piston rod 262 can be moved in the contraction direction by discharging the pressure oil from the upper oil chamber. At this time, the weight of the tripper F in the direction of returning to the discharge posture always acts on the oil chamber below the hydraulic cylinder 260, and when the tripper F stands upright, the weight in this direction becomes zero.

In the swing stroke in which the tripper F moves to the storage posture beyond the position standing upright on the vertical line of the swing axis X, the weight of the tripper F acts to push the piston rod 262 in the retracting direction in association with the tilting movement of the tripper F to the side of the storage posture.

Therefore, although there is a possibility that the operating speed of the hydraulic cylinder 260 is increased in the swing stroke to move to the storage posture, the operating speed of the hydraulic cylinder 260 can be adjusted by controlling the discharge speed from the oil chamber (not shown) above the cylinder tube 261.

During the downward swing of the tripper F from the state in which the tripper F is in the storage posture to the state in which the tripper F stands on the vertical line of the swing axis X, the pressure oil is supplied to the oil chamber above the cylinder 261. At the same time, the piston rod 262 can be moved in the extension direction by discharging pressure oil from an oil chamber (not shown) on the lower side.

At this time, the weight of the tripper F in the direction to return to the storage posture side always acts on the oil chamber above the hydraulic cylinder 260, and the weight in this direction becomes zero when the tripper F stands upright.

In the swing stroke in which the tripper F moves to the discharge posture beyond the position standing on the vertical line of the swing axis X, the weight of the tripper F acts to pull out the piston rod 262 in the extension direction in association with the tilting movement of the tripper F to the discharge posture side.

Therefore, although the operating speed of the hydraulic cylinder 260 may be increased in the swing stroke in which the swing cylinder moves to the discharge position, the operating speed of the hydraulic cylinder 260 can be adjusted by controlling the discharge speed from the oil chamber below the cylinder tube 261.

If the hydraulic cylinder 260 is a single-acting type, the tripper F having the structure of slightly tilting and storing the tripper F inward of the travel machine body a cannot be smoothly driven, but the double-acting type does not have such inconvenience.

That is, if the hydraulic cylinder 260 is a single-acting type hydraulic cylinder and is configured to supply pressure oil to the oil chamber on the lower side of the cylinder tube 261, the pressure oil cannot be supplied to the oil chamber on the upper side, and therefore, the tripper F cannot be lowered and swung from the state in which the tripper F is in the housed posture until the tripper F stands on the vertical line of the swing axis X.

If the hydraulic cylinder 260 is a single-acting type hydraulic cylinder and is configured to supply pressure oil to an oil chamber above the cylinder 261, the pressure oil cannot be supplied to the oil chamber below, and therefore, the tripper F cannot be raised and swung vertically on the vertical line of the swing axis X from the state in which the tripper F is in the discharge posture.

The hydraulic cylinder 260 of the present invention is of a double-acting type, and can supply pressure oil to the oil chamber on either the upper side or the lower side of the cylinder 261. Therefore, the tripper F having a structure that is slightly tilted inward of the travel machine body a and is stored can be driven to swing without any trouble.

[ Fuel tank ]

As shown in fig. 23 to 26 and 28, the fuel tank 204 is disposed at a position corresponding to a space between the grain tank E and the thresher D on the vehicle body frame 210 at the rear end of the travel machine body a.

The main body 270 of the fuel tank 204 is formed in a substantially rectangular box shape as a whole, and includes a fuel fill inlet 271 that opens obliquely rearward and upward at the upper portion on the rear end side thereof.

As shown in fig. 23 to 25, the front end side of the main body 270 is located near the rear end of the secondary returning device 219 of the threshing device D in the front-rear direction, and the rear end side is disposed in a range extending rearward from the rear wall 220r of the grain box E, beyond the rear end of the body frame 210, and extending to a position substantially equal to the rear end of the tripper F in the storage posture.

As shown in fig. 24 to 26 and 28, the threshing device D and the grain box E are disposed between them in a state where the half size of the front right side is fitted into the lower space of the box main body 220 formed by the inclined bottom wall 220A of the grain box E in the left-right direction.

As shown in fig. 26 and 28, the upper end portion on the right side of the main body portion 270 is disposed in a state of being extremely close to the grain tank E in the working posture stored in the traveling machine body a in the vertical direction, that is, in a position closest to the inclined bottom wall 220A to the extent that interference with the inclined bottom wall can be avoided.

As shown in fig. 23 to 27, the rear end side of the main body portion 270 can be prevented from coming into contact with another object from below or from behind by a guard member 280 coupled to the rear end portion of the vehicle body frame 210. That is, the guard member 280 is formed of a pipe member formed in a U shape in a plan view, and the rear end side thereof protrudes rearward from the fuel tank 204 and the rear end portion of the tripper F in the storage posture, and is provided in a range extending from a position on the left side of the left end portion of the fuel tank 204 to a position on the right side of the right end portion of the vertical tube portion 231 of the tripper F in the storage posture in the left-right direction.

As shown in fig. 23, when the maximum inclination angle allowed when the traveling machine body a passes over a ridge is set to α, for example, 30 degrees, the position of the rear end side of the fuel tank 204 is set as follows: even when the traveling machine body a is inclined to the maximum inclination angle α in the backward inclined posture, the traveling machine body a can avoid direct collision with the traveling floor.

That is, as shown in fig. 23, the position of the rear end side of the fuel tank 204 is set such that a line segment connecting the rear end of the main body portion 270 and the rear end of the crawler belt 201 almost coincides with a line segment indicating the maximum inclination angle α. In this way, by extending the position of the rear end side of the fuel tank 204 to the vicinity of the limit position where collision with the traveling floor surface can be avoided when the traveling machine body a is inclined to the maximum inclination angle α in the rearward inclined posture, the capacity of the fuel tank 204 can be further increased in the space above the vehicle body frame 210.

Further, the guard member 280 extends to a position rearward of the position on the rear end side of the fuel tank 204 in the lower portion of the fuel tank 204. An angle β formed by a line segment connecting the rear end of the guard member 280 and the rear end of the crawler belt unit 201 is smaller than the maximum inclination angle α. Therefore, even if the travel machine body a tries to tilt backward to the maximum tilt angle α or more or if there is a convex portion on the ground surface side, the guard member 280 contacts the ground surface first, and the backward tilting of the travel machine body a or the contact of the fuel tank 204 with the convex portion is suppressed, so that the contact of the fuel tank 204 with another object is easily avoided.

As shown in fig. 25, 28, and 30, the main body portion 270 of the fuel tank 204 is detachably fixed to the vehicle body frame 210 at two locations in the front-rear direction by a mounting band 272 having a plate shape.

The mounting band 272 having a plate shape is formed in a substantially door shape when viewed from the front-rear direction so as to extend from a position below the lateral one side of the main body portion 270 of the fuel tank 204 along the outer peripheral surface of the main body portion 270 over the upper surface side of the main body portion 270 to a position below the lateral other side.

One end side of the mounting band 272 is bent laterally outward, and is formed as a bent piece 272a having a bolt insertion hole. A locking member 272b having a hole through which a bolt from above can be inserted is fixed by welding to the other end side of the mounting band 272.

Further, although not shown, a stopper nut is welded and fixed to the vehicle body frame 210 at a portion facing the bent piece 272a on the one end side of the mounting band 272 and to the vehicle body frame 210 at a portion facing the locking member 272b on the other end side, respectively, and the bolts 273a and 273b for connection can be screwed. The retainer nut is welded to the back surface side of the upper sheet of the groove-like frame member constituting the vehicle body frame 210.

Therefore, the one end side of the mounting band 272 can be fixed by inserting the fastening bolt 273a into the bolt insertion hole provided in the bent piece 272a and screwing it into the stopper nut on the vehicle body frame 210 side.

On the other end side of the mounting band 272, the other connecting bolt 273b is passed through the bolt insertion hole of the locking member 272b and screwed and tightened with the stopper nut on the vehicle body frame 210 side, whereby the mounting band 272 can be tightened and the fuel tank 204 can be firmly fixed.

As shown in fig. 24 to 26 and fig. 30, a deck 281 is provided above the right lateral wall D2 of the threshing device D on the upper side of the fuel tank 204, and this deck 281 covers the upper side of the space between the threshing device D including the fuel tank 204 and the grain tank E.

[ Jack receiving ]

As shown in fig. 34 and 35, foot frames 210A, 210A for supporting a frame 201A of the left and right crawler travel units 201 are provided at two front and rear positions of the vehicle body frame 210 at a lower portion of the vehicle body frame 210.

The leg frames 210A and 210A at the front and rear two positions are coupled by two coupling plates 210B in a state of being in contact with the front and rear surfaces of the leg frames 210A and 210A, respectively.

A jack receiving plate 290 is welded and fixed to the connecting plate 210B extending across the front and rear sides on the lower end side of the two connecting plates 210B. The jack receiving plate 290 includes bent portions 290a bent downward at both left and right ends of a flat plate-shaped plate body.

The jack receiving plate 290 has a length in the left-right direction close to the left-right direction interval of the upper end portions of the left and right foot frames 210A, but the length of the welding line in the left-right direction to the connecting plate 210B does not extend over the entire length in the left-right direction, and only a part of the central portion in the left-right direction is welded as indicated by oblique lines in the figure.

This is to avoid the influence of heat-induced deformation or the like on the joining plate 210B when the jack receiving plate 290 is welded to the joining plate 210B from reaching the welding portion between the leg frames 210A, 210A and the joining plate 210B.

As shown in fig. 34, the jack receiving plate 290 configured as described above is provided, and thus, when the crosstie 292 or the like is jacked up in a state of being in contact with the jack 291 and the connecting plate 210B, it is useful to easily avoid a situation in which the crosstie 292 is cracked. Further, the bent portions 290a on both end sides of the jack receiving plate 290 prevent displacement when the jack 291 is mounted on the end of the jack receiving plate 290 when the one frame 201A is floated by the jack 291.

[ other embodiment of the third embodiment ]

(1) In the above-described embodiment, as shown in fig. 25, 26, 28, and 30, the entire body portion 270 is formed in a substantially rectangular box-like configuration as the fuel tank 204, but the fuel tank 204 of the present invention is not limited to such a configuration.

For example, the structure shown in fig. 36 to 39 may be employed.

As shown in fig. 36 and 37, in this structure, as a surface constituting the upper wall of the main body portion 270, the fuel tank 204 is formed so as to extend over substantially the entire length in the front-rear direction: an upward facing surface 274A, in a horizontal or nearly horizontal position; and an inclined surface 274B inclined downward outward and along a bottom wall 220A corresponding to a downward-narrowing inclined portion provided at a lower portion of the grain box E. The inclined surface 274B inclined downward outward is set to an inclination angle parallel or almost parallel to the inclination of the bottom wall 220A corresponding to the inclined portion that narrows downward provided in the lower portion of the grain box E. The upward surface 274A and the inclined surface 274B are formed across almost each length range 1/2 of the main body 270 in the left-right direction in a state of being bisected in the left-right direction by sandwiching the virtual dividing line TCL1 at the center position in the left-right direction.

The upward surface 274A is provided with a fuel fill port 271 standing upward and rearward at a portion near the rear end portion. As shown in fig. 38 and 39, a position near a virtual dividing line TCL2 at the center in the front-rear direction of the upward surface 274A is connected to: a vent hole 275 for exhausting air in accordance with an increase in internal pressure in the tank; and a fuel return pipe 276 for returning the remaining fuel from the engine 203. The vent hole 275 and the fuel return pipe 276 are formed in an upward surface 274A at a position corresponding to a middle position in the left-right direction of the upper wall so as to be close to the center of the area when viewed from the top of the fuel tank 204 in the left-right direction.

In the fuel tank 204, the upward surface 274A and the inclined surface 274B inclined downward outward are surfaces constituting the upper wall of the main body portion 270. The inclined surface 274B and the rising wall surface 274C connected to the lower end of the inclined surface 274B form a lateral wall of the main body portion 270 of the fuel tank 204 on the side close to the grain tank E. Thus, the inclined surface 274B is a part of both the upper wall and the lateral wall of the fuel tank 204.

The upper end of the rising wall surface 274C connected to the lower end of the inclined surface 274B of the lateral wall of the fuel tank 204 located on the side close to the grain tank E is located above the lower end of the grain tank E and at the same height as the almost middle height of the bottom wall 220A corresponding to the inclined portion that is narrowed downward.

Thus, although not shown, a space for arranging a device such as a filter device of the fuel tank 204 is formed between the rising wall surface 274C of the fuel tank 204, the lower half side of the bottom wall 220A of the grain tank E, and the upper surface of the vehicle body frame 210.

Further, a drain 277 for draining the fuel in the fuel tank 204 is provided at a bottom wall portion of the body portion 270. As shown in fig. 38 and 39, the drain port 277 is provided at a position corresponding to the center of the area of the bottom surface 274D in the fuel tank 204 or in the vicinity thereof. That is, the area center of the bottom surface 274D is located at or near the intersection of the virtual dividing line TCL1 located at the center in the left-right direction and the virtual dividing line TCL2 located at the center in the front-rear direction, and the discharge port 277 opens at the bottom surface 274D at a position including or corresponding to the intersection.

As shown in fig. 38 and 39, since the vent hole 275, the fuel return pipe 276, and the drain 277 are all disposed at positions close to the center of the area in the plan view of the fuel tank 204, there is little possibility that the functions of the vent hole 275, the fuel return pipe 276, and the drain 277 are impaired by a change in the posture of the travel machine body a.

That is, as shown in fig. 39, when the vent hole 275, the fuel return pipe 276 are provided near the end portion on the front end side or the rear end side of the fuel tank 204, in the case where the fuel tank 204 is inclined in the front-rear direction due to the inclination of the traveling machine body a in the front-rear direction or the like, when the level FL1 is high, there is a high possibility that the vent hole 275, the fuel return pipe 276 are located at a position lower than the level FL 1. In contrast, when the vent hole 275 and the fuel return pipe 276 are disposed at a position close to the center of the area in the plan view of the fuel tank 204, it is advantageous in that such a situation can be easily avoided.

Further, as shown in fig. 39, when the drain port 277 is provided near the front end side or the rear end side of the fuel tank 204, and the fuel tank 204 is inclined in the front-rear direction due to the travel machine body a being inclined in the front-rear direction, if the liquid level FL2 is low, the drain port 277 may be exposed above the liquid level FL2, and the fuel in the fuel tank 204 may not be drained. In contrast, when the drain 277 is disposed at the center of the area of the bottom surface 274D of the fuel tank 204 or in the vicinity thereof, it is advantageous in that such a situation can be easily avoided.

The inclination of the fuel tank 204 due to the posture change of the travel machine body a described above occurs not only in the front-rear direction but also in the left-right direction, but since the vent hole 275, the fuel return pipe 276, and the discharge port 277 are all disposed at positions close to the center of the area in a plan view of the fuel tank 204, even if the inclination of the fuel tank 204 in the left-right direction due to the posture change of the travel machine body a occurs, the functions of the vent hole 275, the fuel return pipe 276, and the discharge port 277 are less likely to be impaired for the same reason as described above.

The fuel tank 204 is not a rectangular box-shaped fuel tank as shown in fig. 26 and 28, but as shown in fig. 36 to 39, the fuel tank has a bottom wall 220A facing a downwardly narrowed inclined portion provided at a lower portion of the grain tank E, and an inclined surface 274B along the inclination of the bottom wall 220A, and as the overall shape of the fuel tank 204, a shape in which a corner portion of a portion facing the bottom wall 220A of the grain tank E of a rectangular box-shaped tank larger by one turn is cut off obliquely is substantial.

The inclined surface 274B is partially fitted under the bottom wall 220A of the grain tank E, the upward surface 274A is partially positioned between the lateral wall D2 on the grain tank E side of the threshing device D and the lateral wall on the threshing device D side of the grain tank E, and the oil supply port 271 provided to protrude upward from the upward surface 274A is also positioned between the lateral wall D2 on the grain tank E side of the threshing device D and the lateral wall on the threshing device D side of the grain tank E (see fig. 36).

As shown in fig. 36 and 40, the lateral wall of the fuel tank 204 facing the threshing device D is disposed in a state of being positioned closer to the vicinity of the lateral wall D2 on the grain tank E side of the threshing device D than the right end of the secondary returning device 219 attached to the lateral wall D2 on the grain tank E side of the threshing device D. The entire fuel tank 204 is located on the rear side of the secondary loopback device 219 in a range extending from the rear end side of the traveling machine body a to the vicinity of the rear end of the secondary loopback device 219. The fuel tank 204 thus arranged is disposed so as to overlap the secondary return device 219 when viewed from the front-rear direction.

As shown by the imaginary line in fig. 36, the outer peripheral portion of the fuel tank 204 is in a state where the height in the vertical direction and the width in the horizontal direction are increased by one turn as compared with the rectangular box-shaped fuel tank 204 even if the closest distance to the bottom wall 220A of the grain tank E is the same, and the entire volume can be increased as compared with the rectangular box-shaped fuel tank 204 even if the length in the front-rear direction is not changed.

As shown in fig. 37 to 39, a transparent measurement pipe 278 is provided outside the rear surface 274E of the fuel tank 204, and connects the upper portion and the vicinity of the bottom portion in the fuel tank 204.

The presence of the measurement pipe 278 allows the remaining amount of fuel in the fuel tank 204 to be visually checked from the rear side of the travel machine body a.

In this embodiment, the upward surface 274A and the inclined surface 274B are formed so as to extend across almost the entire length range 1/2 of the body portion 270 in the right-left direction while being bisected in the right-left direction by the imaginary dividing line TCL1 located at the center in the right-left direction. For example, the width of the upward surface 274A in the left-right direction may be larger than the width of the inclined surface 274B in the left-right direction, or conversely, the width of the inclined surface 274B in the left-right direction may be larger than the width of the upward surface 274A in the left-right direction.

The positions of the vent hole 275, the fuel return pipe 276, and the drain port 277 are not limited to positions near the center of the area when viewed from above the fuel tank 204, and may be arranged at appropriate positions.

The other structures may be the same as those of the above embodiment.

(2) Fig. 40 and 41 show a portion of a body frame 210 of a combine harvester in which a linear body mounting plate 282 is provided on the body frame 210 as another embodiment.

In this configuration, a linear body mounting plate 282 is provided on the body frame 210 in the space between the opposing positions of the threshing device D and the grain tank E, and the linear body mounting plate 282 is formed by arranging three plate members 283 (corresponding to the ridge plate portions) long in the front-rear direction in parallel.

As shown in fig. 40 and 41, the linear body mounting plate 282 has disposed thereon plate members 283 each having a mountain-shaped cross section in a state spaced apart by a small distance d2 in the left-right direction.

In the wire body mounting plate 282, a recessed portion 284 is formed by inclined surfaces 283a of the adjacent plate members 283. The fuel supply pipe 285a and the conductive cable 285b, which are the linear body 285, are disposed in the recessed portion 284 in a recessed state. Further, at the bottom of the recessed portion 284, an inclusion drop opening 284a through which inclusions drop downward is provided at a small interval d2 formed between the adjacent plate members 283.

Therefore, the inclusions can be dropped from the bottom of the recessed portion 284 for stably supporting the linear body 285, and there is an advantage that the tendency of the inclusions to be deposited on the bottom of the recessed portion 284 can be reduced.

The cross-sectional shape of each plate member 283 constituting the linear body mounting plate 282 is not limited to the mountain shape described above. For example, a semicircular arc shape protruding upward or a groove shape opening downward may be adopted as an appropriate shape, but it is preferable that the recessed portion 284 formed between the adjacent plate members 283 has a slope narrowing downward. The small interval d2 may be set to an appropriate size that facilitates the dropping of dust and the like without dropping the linear body 285, depending on the size of the linear body 285.

The other structures may be the same as those of the above embodiment.

(3) Fig. 42 shows another embodiment of the linear body carrying plate 282.

The linear body placement plate 282 has an engagement hole 283b formed in an inclined surface 283a of a plate member 283 having a mountain-shaped cross section. The string-like body 285 is wrapped around and supported by a fixing member 286 made of a band-like elastic material such as a rubber band.

The anchor 286 is provided with a locking body 286a which is engageable with and disengageable from an engagement hole 283b formed in the inclined surface of the plate member 283, and by engaging the locking body 286a into the engagement hole 283b, the linear body 285 can be reliably locked and supported in the midway position of the inclined surface 283a of the plate member 283 on the side of the recessed portion 284.

As described above, when the linear body 285 is engaged and supported at a position halfway between the inclined surfaces 283a of the plate member 283 located on one side of the recessed portion 284, a gap is formed between the linear body 285 and the inclined surfaces 283a of the plate member 283 located on the other side of the recessed portion 284, which is advantageous in that the inclusions are more easily moved toward the inclusion drop opening 284 a.

The other structures may be the same as those of the above embodiment.

(4) Fig. 43 shows a further embodiment of a conventional combine harvester.

This general combine includes a driving unit B and a pre-harvest treatment device C at the front of a traveling machine body a, and a full-feed threshing device D into which straw harvested by the pre-harvest treatment device C is fed and a grain tank E (corresponding to a grain storage unit) for storing grains supplied from the threshing device D are provided at the rear of the traveling machine body a.

The grain tank E is supported so as to be freely switchable between a working posture (posture shown by a solid line in fig. 43) in which the grain tank E is housed in the travel machine body a and an inspection posture (posture shown by a phantom line in fig. 43) in which the grain tank E is laterally extended from the travel machine body a by being rotated around an upper and lower axis Y2 of a vertical posture at a rear position of the travel machine body a.

The discharger F provided at the rear of the grain box E is provided with: a vertical conveying cylinder (not shown) for conveying the grains to the upper side; and a horizontal transport cylinder 229 for transporting the grain in a horizontal direction connected to the upper end of the vertical transport cylinder and discharging the grain from the transport end of the horizontal transport cylinder 229.

The horizontal transport cylinder 229 is configured to be swingable around a cylinder axis of a vertical transport cylinder which coincides with the vertical axis Y2 of the vertical posture as a swing axis of the grain box E.

The fuel tank 204 is configured to: the rear end of the traveling machine body a is located on the vehicle body frame 210 corresponding to a position between the grain tank E and the threshing device D, and is located at a position that is offset to the inner side of the traveling machine body a in the left-right direction from the position where the vertical axis Y2 exists. Therefore, even if the grain box E and the tripper F are rotated around the vertical axis Y2, the grain box E and the tripper F can be easily prevented from interfering with the fuel tank 204.

The other structures may be the same as those of the above embodiment.

(5) In the above embodiment, the hydraulic cylinder 260 is used as the swing drive device for swinging the tripper F in the up-and-down direction, but the present invention is not limited thereto.

For example, the swing driving device may be configured such that a cable connected to the vertical tube portion 231 of the tripper F is wound up by a winding machine, and the winding machine is driven in the forward and reverse directions by an electric motor. Further, the swing drive device may not be used.

The other structures may be the same as those of the above embodiment.

(6) In the above embodiment, the hydraulic cylinder 260 as the swing driving means for swinging the tripper F in an undulating manner is disposed across the mounting bracket 242 extending from the grain tank E and the tripper F, but the present invention is not limited to this configuration.

For example, a hydraulic cylinder 260 or the like may be disposed to extend over a dedicated member provided on the attachment frame 240 other than the attachment bracket 242 and the discharger F.

The other structures may be the same as those of the above embodiment.

(7) In the above embodiment, the receiving portion 244 for maintaining the receiving posture of the hopper F is provided in the mounting frame 240, but the present invention is not limited thereto.

For example, the receiving unit 244 may be formed of a member other than the mounting frame 240 and may be provided in another part of the travel machine body a, instead of the mounting frame 240.

The other structures may be the same as those of the above embodiment.

(8) In the above embodiment, the configuration in which the discharge-side end portion of the ejector F is inclined inward of the travel machine body a in the storage posture is exemplified, but the present invention is not limited thereto.

For example, in the storage posture of the tripper F, the discharge side end portion may be in a state of standing on the swing axis X of the tripper F or may be slightly inclined outward of the travel machine body a.

The other structures may be the same as those of the above embodiment.

(9) In the above embodiment, the double-acting type is exemplified as the hydraulic cylinder 260 that performs the telescopic operation, but the present invention is not limited thereto, and the single-acting type hydraulic cylinder 260 may be adopted. In this case, when the discharge-side end portion of the tripper F falls inward of the travel machine body a in the storage posture, it is preferable to provide a pressure spring or the like for returning the tripper F in the storage posture to a position standing upright on the swing axis X.

The other structures may be the same as those of the above embodiment.

(10) In the above embodiment, the grain storage unit is exemplified by the grain box E with the discharger F, but the present invention is not limited thereto. For example, a combine having a structure other than the structure relating to the discharger F may be used, in which the discharger F and the grain tank E are not provided, and a hopper having a discharge opening at a lower portion thereof is used. In this case, the grain can be taken out by manually opening and closing the take-out opening of the hopper and bagging can be performed.

The other structures may be the same as those of the above embodiment.

(11) Fig. 44 shows another embodiment of the receiving portion 244 for stably maintaining the storage posture of the discharger F.

In this embodiment, an attachment plate 245 is welded and fixed, the attachment plate 245 includes a plate surface inclined so as to be higher on the right-lateral-outward side than a plane orthogonal to the vertical axis Y as the center axis of the attachment frame 240, and a receiving plate 246 bolted to the attachment plate 245 extends rearward. The receiving plate 246 has an arc-shaped curved recess 246A, and the curved recess 246A is along the outer peripheral surface shape of the vertical tube part 231 of the discharger F.

The receiving plate 246 has a long hole 246a as a coupling and position adjusting portion at a portion where the bolt is coupled to the mounting plate 245. The elongated hole 246a is formed so that the length in the left-right direction of the machine body, which is the direction of the heave movement of the tripper F, is longer than the length in the front-rear direction, and is configured so that the receiving plate 246 can slide in the left-right direction with respect to the mounting plate 245 to adjust the position.

The state shown in fig. 44 is a state in which the receiving plate 246 is located farthest right outside with respect to the mounting plate 245, and the receiving plate 246 can be located close to and fixed to the left inside of the machine body with respect to the mounting plate 245 within a range defined by the long hole 246 a.

The receiving plate 246 has a buffer 246b made of rubber or soft synthetic resin material adhered to the inner circumferential surface side of the arcuate curved recess 246A. The cushion member 246b is elastically deformable in volume by coming into contact with the outer peripheral surface of the vertical tube 231 of the discharger F. The buffer 246b can absorb a slight displacement between the outer peripheral surface of the vertical cylinder portion 231 of the tripper F and the receiving plate 246 by elastic deformation of the buffer 246b, and therefore, has a function of supporting the vertical cylinder portion 231 of the tripper F at an appropriate position together with the long hole 246a serving as the position adjustment portion.

The elongated hole 246a as the position adjustment portion is not limited to the above-described structure provided on the receiving plate 246, and may be provided on the mounting plate 245, or may be provided on both the receiving plate 246 and the mounting plate 245. Further, the position adjusting portion is not limited to the elongated hole 246a, and may be configured such that a plurality of holes for bolt fastening are provided along the undulation direction of the tripper F, and any hole is selectively fastened, whereby the receiving plate 246 can be adjusted in position in the left-right direction with respect to the mounting plate 245.

The other structures may be the same as those of the above embodiment.

(12) Fig. 45 shows a further embodiment of a grain box E.

In this embodiment, a winnowing device 209 is disposed on the left side (right side in fig. 45) of the grain tank E, and an inlet 209A of the winnowing device 209 is connected to the left upper portion of the grain tank E (see fig. 23). Two see-through windows 390a and 390b are formed in the upper portion of the front wall 220f of the grain box E at positions separated in the left-right direction by almost the same height.

The two viewing windows 390a and 390b are provided to be able to see the inside of the grain box E. In this way, by providing the two perspective windows 390a and 390b, when the grain supplied from the winnowing device 209 is different in the state of being stacked on the side close to the inlet 209A and the side far from the inlet 209A, it is easy to grasp the difference and accurately judge the state of being stacked in the grain box E.

The transparent windows 390a and 390b are not limited to two, and may be three or more arranged in the left-right direction.

The other structures may be the same as those of the above embodiment.

Claims (15)

1. A common combine harvester, which is characterized in that,

comprising: a driving part located at the front of the machine body; an engine located below the driver section; and an exhaust pipe through which exhaust gas from the engine flows,

a threshing device and a grain storage part are arranged along the width direction of the machine body, the threshing device is arranged behind the driving part and used for threshing the harvested crops, the grain storage part is used for storing grains obtained by threshing,

the exhaust pipe is in a state of passing between the threshing device and the grain storage part, and the position of an exhaust port for exhausting the exhaust gas to the outside is higher than that of a supply port for supplying the exhaust gas from the engine,

the exhaust pipe has a bent portion at a midway portion of a duct from the supply port to the exhaust port, and a horizontally extending portion extending in a horizontal direction at a rear side of the bent portion,

the supply port is offset toward the grain storage portion side from the horizontally extending portion of the exhaust pipe,

the supply port, the bent part and the horizontal extension part are positioned below the upper end of the threshing device,

the exhaust pipe has a member covering the exhaust pipe from an upper side above the exhaust pipe.

2. A general type combine harvester according to claim 1,

the exhaust pipe is supported by the connecting body via a bracket.

3. A general type combine according to claim 2,

the grain storage part is a grain tank supported on the machine body frame in a mode of freely swinging around an upper and lower axis between an action posture and a maintenance posture, the action posture is a posture that the grain storage part retreats to the inner side of the machine body to store grains, the maintenance posture is a posture that the grain storage part extends to the outer side of the machine body,

the general combine harvester is provided with a position holding mechanism which is arranged between the connecting body and the grain tank in a spanning way and can hold the position of the grain tank in the action posture.

4. A general type combine harvester according to any one of claims 1 to 3,

comprising: a grain delivery device located laterally outside the side wall of the threshing device and configured to convey the grain discharged from the outside of the threshing device upward toward the upper inlet of the grain storage unit; and

a connecting component for connecting the upper side part of the grain winnowing device and the threshing device,

the exhaust pipe is supported by the coupling member.

5. A general type combine harvester according to any one of claims 1 to 3,

a fuel tank is provided at the rear end of the machine body between the lower part of the grain storage part of the threshing device and the lower part of the threshing device of the grain storage part,

the fuel tank and the fuel fill inlet of the fuel tank are provided below the rear end portion of the exhaust pipe in a rear view, and the rear end portion of the exhaust pipe is bent or curved upward.

6. A general type combine harvester according to any one of claims 1 to 3,

comprising: a grain delivery device located laterally outside the side wall of the threshing device and configured to convey the grain discharged from the outside of the threshing device upward toward the upper inlet of the grain storage unit; and

a secondary material returning device which is positioned at the lateral outer side of the side wall of the threshing device and conveys the secondary material discharged from the threshing device to the upper side towards the secondary material inlet of the threshing device,

the secondary object returning device passes through the grain lifting device and the threshing device, and the grain lifting device and the secondary object returning device are crossed when being observed from the side surface of the machine body,

the exhaust pipe passes through the grain winnowing device and between the threshing devices, and passes through the upper part of the secondary object returning device.

7. A combine-harvester is characterized in that,

the threshing device and the grain storage part are arranged in parallel in a state of being arranged along the left and right direction on the frame of the vehicle body,

and a fuel tank is arranged at the rear part between the threshing device and the grain storage part,

a working platform is arranged in the interval between the opposite parts of the threshing device and the grain storage part in a state of being positioned above the fuel tank,

the fuel tank and the work table are arranged in a manner of overlapping in a plan view,

the fuel filler of the fuel tank is disposed on the rear side of the rear end of the work table.

8. A combine harvester according to claim 7,

the oil supply opening extends upward of the fuel tank and is provided between the threshing device and the grain storage section when viewed in the front-rear direction of the machine body.

9. A combine harvester according to claim 7 or 8,

the fuel tank is arranged behind the secondary object returning device.

10. A combine harvester according to claim 7 or 8,

the fuel tank is disposed adjacent to a rear end of the secondary product return device.

11. A combine harvester according to claim 7 or 8,

a driving part is arranged in front of the grain storage part,

an engine is disposed below a driver seat of the driver section,

the fuel supply pipe is arranged along the vehicle body frame below the grain storage part.

12. A combine harvester according to claim 7 or 8,

the guard member that restricts other objects from contacting the fuel tank from below projects rearward from a portion corresponding to the threshing device in the rear end portion of the vehicle body frame.

13. A combine harvester according to claim 12,

the fuel fill inlet is provided in a state in which a rear portion of the fuel tank faces rearward and is adjacent to the shield member in a plan view.

14. A combine harvester according to claim 13,

the fuel supply port is provided in a state of overlapping with an existing range of the shield member in a plan view.

15. A combine harvester according to claim 12,

an elbow of a discharger which discharges grains from the grain storage part is arranged behind the grain storage part,

the prevention part restricts other objects from contacting the elbow from the lower side,

the elbow portion is disposed in a state of overlapping with the existing range of the guard member in a plan view.

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