CN108925250B - Combine harvester - Google Patents

Abstract

The invention discloses a combine harvester which is easy to enlarge a grain box. In the combine harvester, a supporting grain box (20) can be freely swung and switched to a storage posture and a discharge posture after being swung from the storage posture. The grain box (20) is provided with a grain outlet (25), and grains are discharged from the grain outlet (25) by the swinging of the grain box (20) to the discharging posture.

Description

Combine harvester

The application is a divisional application of an invention patent application with application date of 2013, 02/04, entitled "combine harvester" and application number of 201380011694.2.

Technical Field

The invention relates to a combine harvester.

Background

[1] Conventionally, for example, there is a combine harvester shown in patent document 1. In the combine shown in patent document 1, the grain tank is rotated to the right outside around the screw conveyor shaft of the bottom discharge screw conveyor, the bottom discharge screw conveyor is used to transfer the discharge screw conveyor, and the vertical discharge screw conveyor and the upper discharge screw conveyor are used to take out the grains remaining in the grain tank.

[2] Conventionally, a combine harvester has a structure in which: the grain discharging device is provided with a running machine body with a driving part positioned at the front part of the machine body, a grain box supporting and storing the threshing grains can swing and rise freely around a lifting shaft core to a storing posture and a discharging posture after swinging and rising from the storing posture, the grain discharging device is provided with a longitudinal discharging part with the lower end part communicated with the grain box and faces the upper part and the lower part of the running machine body, and a transverse discharging part extending from the upper end part of the longitudinal discharging part, the threshing grains are discharged from the grain box, and the transverse discharging part can be switched freely to a storing position positioned at the inner side of the running machine body and a discharging position protruding to the outer side of the running machine body.

For example, in a combine harvester described in patent document 2, a grain tank is supported to be tiltable toward the outside of the harvester by rotation around a horizontal screw provided at a tank bottom. Grains are carried out from the grain tank by a transverse screw provided at the bottom of the tank, a longitudinal screw (corresponding to a longitudinal carrying-out section) located on the rear side of the grain tank in a state of being connected to the discharge end of the transverse screw, and a grain discharge cylinder (corresponding to a transverse carrying-out section) connected to the upper end of the longitudinal screw. The grain discharging cylinder is switched between a storage position above the grain box and a discharging position extending outside the body.

[3] Conventionally, there is a combine harvester in which a threshing device for threshing harvested straws from a harvesting unit and a grain tank for storing threshed grains from the threshing device are provided on a traveling body.

For example, a combine harvester disclosed in patent document 3 includes a grain tank, a side-feed discharge screw conveyor housed in a lower portion of the grain tank, and a discharge screw conveyor communicating with the side-feed discharge screw conveyor, and a grain discharge port is provided on an outer surface of the grain tank.

Patent document 1: japanese patent application laid-open No. 2000-037134 (JP 2000-037134A),

patent document 2: japanese patent application laid-open No. Hei 4-210519 (JP4-210519A),

patent document 3: japanese patent application laid-open No. 2003-250331 (JP 2003-250331A).

Disclosure of Invention

[1] The problems associated with the background art [1] are as follows.

When a discharge screw conveyor is used to discharge the threshed grain from the grain tank, the discharge path and the grain discharge port are narrowed, and it takes time to discharge the threshed grain. In addition, the damage and clogging of the degranulated grain by the screw conveyor are likely to occur. Particularly, it is likely to occur when discharging wet degranulated grains. In the case of using the bottom discharge auger provided in the bottom of the grain tank, when the grain tank is configured to be held in the storage posture and the grain is discharged, it is necessary to prevent the grain at the bottom of the grain tank from remaining in the vicinity of the bottom discharge auger without flowing into the bottom discharge auger by forming the lower portions of the tank side walls positioned on both lateral sides of the bottom discharge auger into inclined walls inclined toward the bottom discharge auger and forming the portions in the vicinity of the bottom discharge auger of the inclined walls into arc walls having an arc shape as close as possible to the bottom discharge auger along the outer periphery of the bottom discharge auger. Further, when the grain box is configured to swing from the storage posture to the discharge posture, it is necessary to cause the grains in the box to flow down toward the bottom discharge screw conveyor by a downstream side box side wall located on the downstream side in the swing direction of the grain box swinging toward the discharge posture of the grain box out of the box side walls located on both lateral sides of the bottom discharge screw conveyor, and to form a lower portion of the downstream side box side wall to have an arc wall along the outer periphery of the bottom discharge screw conveyor and as close as possible to the arc shape of the bottom discharge screw conveyor, thereby preventing the grains located at the bottom of the grain box from remaining in the vicinity of the bottom discharge screw conveyor without flowing into the bottom discharge screw conveyor.

Therefore, when the bottom discharge screw conveyor is used, the grain tank must be configured to have a shape and a size that are restricted by the shape and arrangement of the tank side walls, and the grain tank is often smaller than the empty space that is to be the tank installation space.

The invention aims to provide a combine harvester, which can easily shorten the discharge time when discharging the threshed grains from a grain tank, reduce the damage of the threshed grains and further easily increase the capacity.

[2] The problems associated with the background art [2] are as follows.

When the grain carrying-out device is provided by applying the conventional technique, the vertical carrying-out part is located on the opposite side of the grain box from the side where the cab is located, and the upper part of the vertical carrying-out part and the horizontal carrying-out part are located at a position higher than the ground, so that it is difficult to perform operations such as inspection and repair with respect to the grain carrying-out device. In addition, it is troublesome to prepare a special work table. Further, the drain pipe located at the tip end portion of the lateral carrying-out portion is often located at a position away from the driver's portion, and it is difficult to align the drain pipe with a discharge destination such as a carrier box.

In particular, in a combine harvester in which a grain tank is supported to be swingably raised and lowered to a storage posture and a discharge posture after being swung and raised from the storage posture, since the grain tank and the like are disposed in a space above a threshing device, the arrangement height of the grain carrying-out device tends to be high, and the above-described problem often occurs.

The invention aims to provide a combine harvester, which is easy to perform the operations of inspection, repair and the like of a grain carrying-out device and the alignment of the grain carrying-out device relative to a grain discharging destination.

[3] The problems associated with the background art [3] are as follows.

In a combine harvester having a discharge screw provided in the bottom of a grain tank, a grain carrying screw conveyor communicating with the discharge screw, and a grain outlet port openably and closably provided in a side wall of the grain tank, for example, when a carriage is located at a position away from a traveling machine body, grain supply is facilitated by the grain carrying screw conveyor even if a container is away from the traveling machine body, and when the carriage is located at a position close to the traveling machine body, grain supply is facilitated even if the container is located at a position close to the traveling machine body by the grain outlet port. That is, the grain supply can be facilitated by using the grain carrying-out screw and the grain discharge opening separately.

However, when the grains are taken out from the grain outlet port in the grain box in a state where the grains are fed from the threshing device and held, the grains are not easily discharged particularly from a portion of the box on the opposite side to the grain outlet port side, and the grains are likely to be missed.

The invention aims to provide a combine harvester which not only supplies grains by using a grain carrying screw conveyor and a grain outlet separately, but also easily avoids missing grains when the grain outlet is used.

[1] The solution corresponding to the problem [1] is as follows.

A combine harvester, which can support a grain box for retaining threshing grains or the bottom of the grain box to freely swing and switch to a retaining posture and a discharging posture after swinging from the retaining posture, wherein the grain box is provided with a grain discharging port, and grains are discharged from the grain discharging port through the swinging of the grain box or the bottom to the discharging posture.

According to this configuration, when the grain tank or the bottom of the grain tank is swung from the storage posture to the discharge posture, the grains in the tank naturally flow out from the grain discharge port, so that it is not necessary to use a discharge screw conveyor, the discharge time is shortened, and the damage to the threshed grains is reduced. Further, the grain tank can be constituted without using the bottom discharge screw, and without being restricted by the shape and arrangement of the side wall which occurs when the bottom discharge screw is used.

Therefore, the threshed grain can be discharged from the grain tank quickly and without causing damage to the grain. Even particularly moist degranules can be discharged rapidly. Further, the grain box can be a large box which can utilize the vacant space as the box setting space without waste, more threshing grains can be left, the number of work interruption for taking out the full grains can be reduced, and the work can be performed efficiently.

In a preferred embodiment, the grain tank is pivotally supported by the pivot or the bottom is swingable about the lifting axis.

According to this configuration, the grain tank or the bottom portion can be supported by the simple support structure that pivotally supports one end side of the grain tank or the bottom portion about the elevating shaft core, and the grain tank or the bottom portion can be supported to be swingable between the storage posture and the discharge posture.

Therefore, the grain box or the bottom can be supported by the support structure with simple structure, and can be obtained at low cost.

In a preferred embodiment, the grain tank is supported such that the lifting axis of the grain tank faces the front and rear of the travel machine body.

According to this configuration, the movement direction of the load of the grain tank and the grains in the tank, which is generated by the swinging of the grain tank from the storage posture to the discharge posture, is the transverse direction of the machine body, and the weight balance of the traveling machine body in the front-rear direction is not easily broken regardless of the swinging of the grain tank to the discharge posture.

Therefore, when taking out the grain from the grain tank, a stable state with a good weight balance between the front and rear of the traveling machine body can be maintained.

In a preferred embodiment, the discharge posture of the grain tank is a posture swung up from the storage posture.

According to this configuration, the device or the component located below the grain tank is less likely to become an obstacle to switching to the discharge posture with respect to the grain tank, and the swing height in the discharge posture of the grain tank can be increased, thereby smoothly performing the natural flow of grains in the grain tank in the discharge posture.

Therefore, the grain can be smoothly and quickly taken out from the grain box due to the smooth natural flow of the grain.

In a preferred embodiment, the grain outlet is provided in a side wall of the grain tank.

According to this configuration, the grain discharge port is directed downward by the swinging of the grain box in the discharge posture, and the grains can smoothly flow out from the grain discharge port.

Therefore, when the grains are taken out from the grain box, the grains can smoothly and rapidly flow out.

In a preferred embodiment, the grain outlet is provided over the entire width or substantially the entire width of the side wall of the grain tank.

According to this configuration, the grain discharge port is a wide grain discharge port extending over the entire width or substantially the entire width of the side wall of the grain box, and the grain discharge amount per unit time can be increased.

Therefore, the removal of the grains from the grain box can be smoothly and quickly performed due to the large discharge amount per unit time.

In a preferred embodiment, the grain discharge port is disposed at a lower portion of a side wall of the grain tank.

According to this configuration, the grain discharge port is connected to the bottom of the grain box, and a corner portion formed by the bottom and the side wall can be made less likely to occur.

Therefore, grain stagnation caused by the corner formed by the bottom and the side wall is not easily generated, and grain remaining in the grain tank is easily controlled.

In a preferred embodiment, an opening adjusting means for changing and adjusting the opening area of the grain outlet is provided.

According to this configuration, since the opening area of the grain discharge port can be adjusted by changing the opening adjusting means, when the capacities of the receiving sides of the transport vehicles and the like are different, it is possible to adjust the grain discharge port so that a large amount of grains do not instantaneously flow out to the receiving side.

Therefore, it is possible to adjust the grain size so that a large amount of grains do not instantaneously flow out to the receiving side and overflow from the receiving side.

In a preferred embodiment, the opening adjusting means is configured to change the width of the grain outlet.

According to this configuration, even when the size of the receiving side is different such as the carriage box, the lateral width of the grain discharge port can be adjusted to the size of the receiving side.

Therefore, the lateral width of the grain outlet can be adjusted to the size of the receiving side, so that the grains from the grain box can be prevented from overflowing to the outside of the receiving side, and the grains can be quickly supplied to the receiving side.

In a preferred embodiment, the grain outlet is divided into a plurality of divided outlets, and the opening adjusting unit is configured by a plurality of covers that are opened and closed, respectively.

According to this configuration, the opening adjustment unit can be configured simply by providing a plurality of covers that can be opened and closed individually.

Therefore, an advantageous combine harvester capable of adjusting the opening amount of the grain discharge port can be obtained at low cost.

In a preferred embodiment, the plurality of lid bodies are pivotally supported to be swingable around an opening/closing shaft core disposed on the upper end side.

According to this configuration, the lid body can be opened by the swing of the lid body caused by the hanging-down of the grain box in accordance with the swing, and the lid body can be closed by the swing of the lid body caused by the hanging-down of the grain box in accordance with the swing.

Therefore, a convenient combine harvester in which the cover is naturally opened and closed only by swinging the grain tank can be obtained at low cost.

In a preferred embodiment, the grain tank is provided with a discharge duct for guiding the falling of the threshed grain from the grain outlet.

According to this configuration, the threshed grain discharged from the grain discharge port of the grain box can be guided to the receiving side by the discharge pipe and supplied.

Therefore, the grains are guided by the discharge pipe, and the grains can be well prevented from scattering to the outside of the receiving side.

In a preferred embodiment, the discharge pipe is supported so as to be switchable between a use posture in which the discharge pipe is extended from the grain tank to the outside and a storage posture in which the discharge pipe is retracted to the grain tank side.

According to this configuration, the discharge pipe can be switched to the storage posture, so that the discharge pipe can be prevented from protruding out of the grain box.

Therefore, the discharge pipe can be switched to the storage posture during the operation or the movement without being obstructed.

In a preferred embodiment, the discharge pipe is configured to cover the grain discharge port along the sidewall of the grain box in the storage posture.

According to this configuration, the discharge pipe can function as a lid body pressing lever so that the discharge pipe in the storage posture is positioned outside the grain discharge port and the lid body of the grain discharge port is pressed in the closed posture.

Therefore, the lid body can be fixed in the closed position in advance by a simple structure in which the discharge pipe is flexibly used for the lid body pressing rod at the time of work or movement.

In a preferred embodiment, the chute includes a bottom plate constituting a main body of the chute, and vertical plates rising from both end sides of the bottom plate.

According to this structure, can prevent through the vertical plate that the cereal grain that is guided by the discharge tube from scattering in the discharge tube.

Therefore, the grains can be prevented from scattering from the discharge pipe, and the grains can be reliably supplied to the receiving side.

[2] The solving means corresponding to the problem [2] is as follows.

A combine harvester comprises a running machine body with a driving part positioned at the front part of the machine body, a grain box supporting and storing threshing grains and swinging and lifting to a storage posture around a lifting shaft core and a discharge posture after swinging and lifting from the storage posture, and a grain delivery device comprising a longitudinal delivery part with the lower end part communicated with the grain box and facing to the upper and lower parts of the running machine body and a transverse delivery part extending from the upper end part of the longitudinal delivery part, wherein the threshing grains are delivered from the grain box, the transverse delivery part is configured to be capable of switching to a storage position positioned at the inner side of the running machine body and a delivery position protruding to the outer side of the running machine body, and the longitudinal delivery part is arranged at the rear side part of the driving part at the front side of the running machine body of the grain box.

According to this configuration, in order to perform work such as inspection and repair of the grain carrying-out device by positioning the proximal end sides of the longitudinal carrying-out section and the lateral carrying-out section near the cab, the work can be easily performed by approaching from the cab or a step attached to the cab without using a special work table. Further, in order to carry out grain delivery, the tip end portion of the lateral carrying-out portion is easily seen from the cab, and the discharge portion of the lateral carrying-out portion is easily aligned with the discharge portion.

Therefore, the work such as inspection and repair of the grain carrying-out device can be performed easily and efficiently without preparing a special work table. To carry out grain delivery, the horizontal delivery part is easily aligned with the discharge destination, and the grain delivery can be carried out efficiently.

In a preferred embodiment, the storage position is set such that an outside end of the traveling machine body at the storage position of the traverse transport portion and an outside end of the traveling machine body in the storage posture of the grain tank are located at the same or substantially the same inside and outside positions of the traveling machine body.

According to this configuration, the lateral carrying-out part is stored in advance in a portion of the grain box near the outside of the traveling machine body, and can be quickly moved from the storage position to the carrying-out position.

Therefore, the horizontal carrying-out part can be rapidly moved to the carrying-out position to carry out grain carrying-out, and the grain carrying-out can be carried out efficiently.

In a preferred embodiment, the grain carrying-out device is provided such that the longitudinal carrying-out part is located at an outer side end of the traveling machine body.

According to this configuration, the vertical carrying-out portion is positioned on the outer side of the traveling machine body, and the work such as inspection and cleaning of the vertical carrying-out portion can be easily performed from the outer side of the traveling machine body.

Therefore, the inspection, cleaning, and other operations of the vertical transport portion can be easily performed from the outside of the traveling machine body, and can be efficiently performed.

In a preferred embodiment, the grain box is provided with a recess into which the lateral outlet enters at the storage position at an upper portion thereof.

According to this configuration, even if the vertical length of the grain box is increased to increase the box capacity of the grain box, the horizontal carry-out portion can be inserted into the recessed portion, and the horizontal carry-out portion can be stored while preventing the ground height from being increased by the horizontal carry-out portion.

Therefore, the combine harvester can prevent the horizontal delivery part from being stored above the grain box when the ground height is increased by the horizontal delivery part, and can store a large amount of threshed grains in the grain box.

In a preferred embodiment, the recessed portion is formed so as to open upward and outward of the travel machine body in a state where the grain tank is in the storage posture.

According to this configuration, the transverse carrying-out part can be moved in and out of the recessed part only by moving the transverse carrying-out part in the horizontal direction with respect to the grain box, and the storage and taking-out operation of the transverse carrying-out part can be facilitated.

Therefore, the transverse transporting part is stored in the concave part of the grain box, the storing and taking-out operation of the transverse transporting part is easy, and the grain transporting operation and the restarting of the harvesting operation after the transporting operation are finished can be rapidly carried out.

In a preferred embodiment, a front concave portion which is concave toward the rear side of the body and is open to the outside in the lateral direction of the body is provided at a lateral end portion of a side of the longitudinal discharging portion on the front side wall of the grain box, and the lateral discharging portion enters the front concave portion when the grain box is swung to the discharging posture with the lateral discharging portion at the discharging position.

According to this configuration, even if the grain box and the vertical carrying-out part are arranged in a state of being laterally gathered in the front-rear direction of the machine body and the swinging angle of the grain box from the storage posture to the discharge posture is increased, interference between the grain box in the carrying-out posture and the horizontal carrying-out part located at the carrying-out position can be prevented by the entrance of the horizontal carrying-out part into the recessed part.

Therefore, the grain box and the grain carrying-out device can be equipped in a compact state that the grain box and the longitudinal carrying-out part are gathered along the front and back direction of the machine body and the transverse direction of the machine body, and a compact combine harvester is obtained.

The swing angle of the grain box is increased when the posture of the grain box is changed from the storage posture to the discharge posture, so that the grain in the grain box in the discharge posture is easy to be discharged and moved, and the grain is rapidly carried out.

In a preferred embodiment, a transmission unit for transmitting power from an engine to the grain carrying-out device is provided with a transmission unit disposed at a position behind a cab unit on a front side of a travel machine body of the grain carrying-out device.

According to this configuration, since the transmission portion of the transmission device is located between the grain carrying-out device and the operation portion, the operation such as inspection and repair of the transmission portion can be easily performed from the lateral outside and the upper side of the machine body.

Therefore, the work for inspecting and repairing the transmission is easy to be performed with respect to the transmission unit, and the efficiency as a whole is improved.

In a preferred embodiment, the engine is provided below the power transmission unit.

According to this configuration, the transmission device can be configured in a compact state in which the transmission distance from the engine to the transmission unit is short.

Therefore, the transmission device can be made compact, and a compact combine harvester is obtained.

In a preferred embodiment, the bottom of the grain tank is provided with a bottom discharge screw.

According to this configuration, since the vertical carrying-out portion is located on the front side of the traveling body of the grain tank, a working space for attaching and detaching the bottom discharge screw and the like can be provided on the rear side of the traveling body of the grain tank, and the bottom discharge screw is provided.

Therefore, the bottom discharge screw is provided, and the operations such as replacement and repair of the bottom discharge screw can be easily performed on the rear side of the travel of the grain tank.

In a preferred embodiment, an automatic switching unit is provided which switches the traverse transport unit in association with a swinging operation of the grain tank so that the traverse transport unit is switched to the transport position in association with a swinging operation of the grain tank toward the discharge posture and the traverse transport unit is switched to the storage position in association with a swinging operation of the grain tank toward the storage posture.

According to this configuration, since the traverse transport unit is naturally switched to the transport position when the grain tank is operated to swing toward the discharge posture, the grain transport mode in which the traverse transport unit is switched to the discharge position can be easily operated by merely switching the grain tank to the discharge posture. Since the transverse carrying-out part is naturally switched to the storage position when the grain box is operated to swing toward the storage posture, the storage form in which the transverse carrying-out part is switched to the storage position can be easily obtained by simply switching the grain box to the grain storage posture.

Therefore, the grain carrying-out operation or the harvesting operation can be easily achieved only by switching the grain box to the discharging posture or the storing posture.

In a preferred embodiment, the grain bin further includes a bin actuator for operating the grain bin to swing up and down between the storage position and the discharge position, and a carry-out actuator for operating the lateral carry-out section to switch between the storage position and the carry-out position, and the grain bin further includes a manually operable bin operation unit for operating the bin actuator to drive the grain bin to switch between the discharge position and the manually operable carry-out operation unit for operating the carry-out actuator to drive the lateral carry-out section to switch between the transport position and the discharge position.

According to this configuration, when the box operation means is operated, the box actuator can be driven to switch the grain box to the discharge posture or the storage posture, and when the carry-out operation means is operated, the carry-out actuator can be driven to switch the lateral carry-out section to the carry-out position or the storage position.

Therefore, in addition to the posture switching of the grain box being performed in association with the position switching of the lateral carrying-out unit, it is very convenient to arbitrarily perform the position switching of the lateral carrying-out unit such as the position switching of the lateral carrying-out unit at the carrying-out position and the posture switching of the grain box by keeping the grain box in the storage posture.

In a preferred embodiment, the automatic switching unit is configured to operate the box actuator when the traverse carrying-out section is in the carrying-out position.

According to this configuration, even if the grain box in the storage posture and the lateral carrying-out part in the storage position are compactly arranged in a gathered manner, the lateral carrying-out part can be positioned at the carrying-out position when the posture of the grain box is switched, and interference between the grain box and the lateral carrying-out part can be avoided.

Therefore, the posture switching of the grain box and the position switching of the transverse carrying-out part are performed in a correlated manner, and the grain box and the grain carrying-out device are arranged in a compact state that the grain box in the storage posture and the transverse carrying-out part in the storage position are gathered, thereby obtaining a compact combine harvester.

In a preferred embodiment, the automatic switching unit is configured to operate the carrying-out actuator when the traverse carrying-out unit is in the storage position, and to operate the box actuator after the traverse carrying-out unit has moved to the carrying-out position.

According to this configuration, even if the grain box in the storage posture and the lateral carrying-out part in the storage position are compactly arranged in a gathered state, the grain box can be switched to the carrying-out posture after the lateral carrying-out part is positioned at the carrying-out position, and interference between the grain box and the lateral carrying-out part can be avoided.

Therefore, the posture switching of the grain box and the position switching of the transverse carrying-out part are performed in a correlated manner, the grain box and the grain carrying-out device are arranged in a compact state that the grain box in the storage posture and the transverse carrying-out part in the storage position are gathered, and the compact combine harvester is obtained.

In a preferred embodiment, the automatic switching unit is configured to operate the carrying-out actuator when the grain tank is in the storage posture.

According to this configuration, even if the grain box in the storage posture and the lateral carrying-out section in the storage position are compactly arranged in a gathered manner, the grain box can be set in the storage posture in advance to avoid interference between the grain box and the lateral carrying-out section when the position of the lateral carrying-out section is switched.

Therefore, posture switching of the grain box is performed in association with position switching of the traverse transport section, and the grain box and the grain transport device are arranged in a compact state in which the grain box in the storage posture and the traverse transport section in the storage position are gathered, thereby obtaining a compact combine harvester.

In a preferred embodiment, the automatic switching unit is configured to operate the box actuator when the grain box is in the discharge posture, and to operate the carry-out actuator after the grain box is moved to the storage posture.

According to this configuration, even if the grain box in the storage posture and the lateral carrying-out part in the storage position are compactly arranged in a gathered manner, the lateral carrying-out part can be located at the carrying-out position in advance when the grain box is switched to the storage posture, and interference between the grain box and the lateral carrying-out part can be avoided.

Therefore, the posture switching of the grain box is performed in association with the position switching of the lateral carrying-out part, and the grain box and the grain carrying-out device are arranged in a compact state in which the grain box in the storage posture and the lateral carrying-out part in the storage position are gathered, thereby obtaining a compact combine harvester.

In a preferred embodiment, the grain tank is set to a storage position in which the grain tank is lowered and swung above the threshing device.

According to this configuration, the space above the threshing device can be used as the installation space of the grain box, and the grain box can be installed in the storage posture.

Therefore, the number of work interruptions necessary for the grain transportation from the full grain tank can be reduced, and the harvesting work can be performed efficiently.

In a preferred embodiment, the grain tank is disposed such that the lifting axis of the grain tank faces the front and rear of the travel machine body.

According to this configuration, even if the grain tank is switched to the discharge posture, the load generated by the grain tank and the grains in the tank does not shift or hardly shift in the front-rear direction of the travel machine body by the grain tank swinging up around the lifting shaft core toward the front-rear direction of the travel machine body.

Therefore, regardless of the switching of the grain tank to the discharge posture, the weight balance of the traveling machine body in the front and rear direction is not disrupted or is not easily disrupted, and the threshed grains can be carried out in a stable state.

[3] The solving means corresponding to the problem [3] is as follows.

A combine harvester, on a running body, a threshing device for threshing the harvested straws from a harvesting part and a grain box for storing the threshed grains from the threshing device are arranged, characterized in that the grain box is arranged above the threshing device, the combine harvester is provided with a discharge screw arranged in the bottom of the grain box and a grain delivery screw conveyor communicated with the discharge screw, a driving mechanism for operating the grain box to swing and switch an ascending posture and a descending posture around a lifting shaft core is arranged, and a grain outlet which can be freely opened and closed is arranged on the side wall of the grain box facing to the outside of the running body and facing to the lower part under the ascending posture of the grain box.

According to this configuration, the grains discharged from the grain tank by the discharge screw can be carried out by the grain carrying-out screw conveyor.

Since the grain tank is switched to the upward posture by the drive mechanism and the grain outlet is opened at the same time, the grain outlet is opened downward toward the outside of the traveling machine body, grains in the tank located near the grain outlet flow out from the grain outlet flow, and along with the outflow, grains in other tank parts are forced to flow to the grain outlet due to the posture change of the grain tank, and are easy to flow out from the grain outlet flow.

Further, by opening the grain outlet, the inside of the grain tank can be inspected and cleaned by using the grain outlet as a work opening.

Therefore, in order to supply grains to a carriage box or the like, not only can the grain carrying-out screw conveyor and the grain outflow port be used for supply separately, but also when the grain is supplied by using the grain outflow port, the grain is forced to flow by the upward swinging of the box, thereby eliminating or reducing the missing of the grains. In addition, the grain outlet can be used for the operation opening, and the internal inspection and the internal cleaning of the grain box can be easily performed.

In a preferred embodiment, a discharge duct is provided to direct the falling of the degranulated grain from the grain outlet opening.

According to this configuration, the threshed grains discharged from the grain outlet can be guided to the supply destination through the discharge duct, and leakage of the grains to the outside of the supply destination can be prevented favorably.

Therefore, the supply of grains without leakage from the supply destination can be performed without preparing a special supply guide.

In a preferred embodiment, the discharge pipe is supported by the grain box and is swingable up and down between a lowered use posture and a raised storage posture, and an interlocking mechanism is provided for interlocking the discharge pipe with the grain box so that the discharge pipe is switched to the lowered use posture in conjunction with switching of the grain box to the raised posture, and the discharge pipe is switched to the raised storage posture in conjunction with switching of the grain box to the lowered posture.

According to this structure, when switching over the grain case to the rising posture, the discharge tube uses the posture switching to descend naturally under link gear's effect.

Therefore, the grain supply using the discharge pipe can be easily performed without the need to switch the discharge pipe to the downward use posture.

In a preferred embodiment, a lock unit is provided for holding the discharge pipe in the ascending storage posture prior to the link mechanism, and the lock mechanism is switchable between an operating state and a release state.

According to this configuration, when the grain box is switched to the raised posture and the grain in the box is carried out by the grain carrying-out screw conveyor while the grain is made to flow by the discharging screw, the lock unit is switched to the operating state, whereby the discharge pipe can be maintained in the raised storage posture regardless of the switching of the grain box to the raised posture.

Therefore, when the grain is supplied through the grain outlet, the discharge pipe can be naturally switched to the descending use posture, and the defect that when the grain box is switched to the ascending posture and the grain is conveyed through the grain discharge screw conveyor, the discharge pipe is switched to the descending use posture can be avoided.

In a preferred embodiment, the lifting axis of the grain tank and the rotating axis of the discharge screw are the same.

According to this configuration, the grain tank can be swung up and down without having to provide a special function of swinging up and down the grain tank in a transmission structure for the discharge screw.

Therefore, the discharge screw can be driven by the simple-structured transmission structure having the discharge screw and capable of swinging and lifting the grain tank, and not having a special function of swinging and lifting the grain tank.

In a preferred embodiment, the grain tank includes a lateral tank portion located laterally to the threshing device, and an upper tank portion extending from the lateral tank portion and located above the threshing device.

According to this configuration, the grain box can be a large-capacity box extending over the side and upper side of the threshing device.

Therefore, a large amount of degranulated grains can be stored in the grain tank, the number of work interruptions for taking out the degranulated grains from the full grain tank can be reduced, and work can be performed efficiently.

In a preferred embodiment, the lateral box portion is located laterally to the traveling machine body with respect to the threshing device, and the lifting/lowering shaft center of the grain box is located in the lateral box portion in the front-rear direction of the traveling machine body.

According to this configuration, regardless of the switching of the grain tank to the raised posture, the grain tank and the load generated by the grains in the tank do not shift in the front-rear direction of the travel machine body, and the front-rear weight balance of the travel machine body is not easily broken.

Therefore, regardless of the rise of the grain tank, the grain can be carried out or the threshing device can be opened in a stable state in which the weight balance between the front and rear of the traveling machine body is not easily broken.

Other features and advantageous effects according to these features will become apparent from reading the following description with reference to the accompanying drawings.

Drawings

Fig. 1 is a right side view showing the whole of a combine harvester according to embodiment 1 (hereinafter, the same applies to fig. 14);

fig. 2 is a left side view showing the entirety of the combine harvester;

fig. 3 is a plan view showing the whole of the combine harvester;

fig. 4 is a rear view showing the entirety of the combine harvester;

FIG. 5 is a right side cross-sectional view showing the threshing apparatus;

FIG. 6(a) is a front view showing the grain tank and the threshing device, and FIG. 6(b) is a vertical sectional front view showing the top plate in a closed position;

fig. 7(a) is a front view showing the threshing device in a state where the threshing chamber is closed, the grain box in a storage posture, and the discharge pipe in a storage posture, and fig. 7(b) is a front view showing the threshing device in a state where the threshing chamber is opened, the grain box in a discharge posture, and the discharge pipe in a use posture;

fig. 8(a) is a rear view showing the reducing device, and fig. 8(b) is a perspective view showing the reducing device in a state where the screw conveyor is opened;

FIG. 9 is a view in the direction of section IX-IX of FIG. 6, FIG. 9(a) is a cross-sectional plan view of the grain discharging barrel in a state in which the position is changed to a position for feeding, and FIG. 9(b) is a cross-sectional plan view of the grain discharging barrel in a state in which the position is changed to a position for box swinging;

FIG. 10(a) is a rear vertical sectional view showing a supporting structure of the grain tank, and FIG. 10(b) is a side view showing the supporting structure of the grain tank;

FIG. 11 is a perspective view showing a grain discharging part of the grain box;

FIG. 12 is an explanatory view showing the arrangement of the grain box with respect to the travel machine body;

fig. 13 is a block diagram showing an operating system of a grain tank, a winnower, and a threshing clutch;

fig. 14(a) is a rear view of a grain box having another embodiment structure in a storage state, fig. 14(b) is a side view of a grain box having another embodiment structure in a storage state, fig. 14(c) is a rear view of a grain box having another embodiment structure in a discharge state, and fig. 14(d) is a side view of a grain box having another embodiment structure in a discharge state;

fig. 15 is a right side view showing the whole of a combine harvester according to embodiment 2 (hereinafter, the same as fig. 32);

fig. 16 is a left side view showing the entirety of the combine harvester;

fig. 17 is a plan view showing the whole of the combine harvester;

fig. 18 is a rear view showing the entirety of the combine harvester;

fig. 19 is a right lateral side view showing the threshing device;

FIG. 20(a) is a front view showing a grain tank and a threshing device, and FIG. 20(b) is a vertical sectional front view showing a top plate in a closed position;

fig. 21(a) is a front view showing the threshing device in a state where the threshing chamber is closed and the grain tank in a storage posture, and fig. 21(b) is a front view showing the threshing device in a state where the threshing chamber is opened and the grain tank in a discharge posture;

FIG. 22 is a perspective view showing the grain tank in the discharge position;

FIG. 23 is a perspective view showing a front concave portion of the grain box;

fig. 24(a) is a rear view showing the reducing device, and fig. 24(b) is a perspective view showing the reducing device in a state where the screw conveyor is opened;

FIG. 25 is a cross sectional view taken along line XXV-XXV in FIG. 20, FIG. 25(a) is a cross sectional plan view of the grain discharging tube in a state where the position is changed to the supply position, and FIG. 25(b) is a cross sectional plan view of the grain discharging tube in a state where the position is changed to the box swing position;

fig. 26 is a side view showing a supporting structure of the grain tank and the grain carrying-out device;

FIG. 27(a) is a plan view showing a grain carrying-out apparatus, and FIG. 27(b) is a cross-sectional view taken along line XXVIIb-XXVIIb in FIG. 27 (a);

FIG. 28 is an explanatory view showing the arrangement of a grain box with respect to a travel machine body;

fig. 29 is a block diagram showing an operating system of a grain box and a grain carry-out apparatus;

FIG. 30 is a flowchart of switching control of the grain box and the traverse section;

FIG. 31 is a flow chart of discharge attitude control of a grain bin;

FIG. 32 is a flow chart of persistence posture control for a grain bin;

fig. 33 is a right side view showing the whole of a combine harvester according to embodiment 3 (hereinafter, the same as fig. 47);

fig. 34 is a left side view showing the entirety of the combine harvester;

fig. 35 is a plan view showing the whole of the combine harvester;

fig. 36 is a rear view showing the whole of the combine harvester;

FIG. 37 is a longitudinal sectional side view showing the threshing apparatus;

fig. 38 is a side view showing a threshing device, a reducing device and a winnowing device;

fig. 39 is a front view showing a threshing device and a winnowing device;

FIG. 40 is a side elevation view showing the grain carry out screw conveyor and drive configuration;

FIG. 41(a) is a front view showing a grain tank in a descending position, and FIG. 41(b) is a front view showing a grain tank in an ascending position when a grain is taken out by a grain carrying-out screw conveyor;

fig. 42 is a perspective view showing a link mechanism and a hook;

FIG. 43 is a front view of the grain box in an elevated position when the grains are taken out from the grain outlet;

FIG. 44(a) is a side view showing a grain box, and FIG. 44(b) is a rear longitudinal sectional view showing the grain box;

FIG. 45 is an explanatory view of a grain survival state;

FIG. 46 is an explanatory view of a state where grains are taken out from a grain flow outlet;

FIG. 47 is a view showing a state where grains are taken out of the screw conveyor.

Description of reference numerals:

20: grain box, 20D: bottom, 20 d: side wall, 25: grain outlet, 25 a: split outlet, 70: aperture adjustment unit, 71, 72: cover, 80: discharge tube, 80 a: bottom plate, 80 b: vertical plate, 103: driver, 104 a: engine, 120: grain box, 120 a: front side wall, 120 d: outer end, 126: recessed portion, 127: front concave portion, 161: tank actuator, 170: bottom discharge screw, 171: grain carrying-out device, 172: longitudinal carry-out portion, 173: lateral carry-out portion, 173 t: traveling body outer side end, 181: transmission, 189: transmission, 190: carry-out actuator, 193: box operating unit, 196: carry-out operation unit, 207: automatic switching unit, 310: threshing apparatus, 320: grain box, 321: side box portion, 322: upper tank portion, 325: side wall, 326: grain outflow, 330: a harvesting portion, 350: discharge screw, 351: grain export auger, 366: drive mechanism, 371: discharge tube, 373: locking unit, 376: linkage mechanism, C: carry-out position, D: storage position, Y, Y1: lifting shaft core, Z: the shaft core is opened and closed.

Detailed Description

[ embodiment 1]

Hereinafter, embodiment 1 will be described with reference to fig. 1 to 14.

Fig. 1 is a right side view showing the whole of the combine harvester. Fig. 2 is a left side view showing the whole of the combine harvester. Fig. 3 is a plan view showing the whole of the combine harvester. Fig. 4 is a rear view showing the whole of the combine harvester. As shown in these drawings, the combine harvester includes a traveling body having a pair of left and right front wheels 1, 1 which are drivable, a pair of left and right rear wheels 2, 2 which are steerable, and a steering unit 3, and includes a threshing device 10 and a grain tank 20 which are disposed behind the steering unit 3 and provided on the traveling body, and a harvesting unit 30 having a feeder 31 which projects from the front of the threshing device 10 toward the front of the traveling body.

The combine harvester is used for harvesting rice, wheat, corn and the like. That is, this combine harvesters plants the grain stalks such as rice, wheat and so on through reaping portion 30 and reaps the processing, carries out threshing to reaping the grain stalks through threshing device 10 to retrieve the threshing grain and persist grain case 20.

The traveling machine body will be explained.

The traveling machine body includes a prime mover 4, and the prime mover 4 has an engine 4a provided between a front wheel 1 and a rear wheel 2, and drives a pair of left and right front wheels 1, 1 by a driving force from the engine 4a to travel by itself. The travel machine body includes a cab 3a provided in the cab 3, and is of a riding type in which the travel machine body is operated by riding in the cab of the cab 3.

The cab 3 includes an entrance 3b provided on one of the left and right entrances 3b and 3b of the cab 3a, and an entrance 3c provided on the lateral outer side of the other entrance 3b, and a working step 3d provided on the lateral outer side of the other entrance 3 b. The step-up/down pedal 3c has a stepped structure.

As shown in fig. 4, a body-side rear wheel support frame 5 that rotatably and steerably supports a pair of left and right rear wheels 2, 2 on both end sides is supported by a body-side support portion 6a of a body-side coupling frame 6 provided at the rear portion of a body frame F constituting a traveling body. The rear wheel support frame 5 is provided with a rolling fulcrum 7 formed by a rolling fulcrum shaft toward the front and rear of the machine body, which is attached to the support portion 6a and the rear wheel support frame 5, and the rear wheel support frame 5 swings up and down about the rolling fulcrum 7 with respect to the connecting frame 6, so that the pair of right and left rear wheels 2, 2 move up and down away from each other about the rolling fulcrum 7 with respect to the machine body frame F.

The harvesting section 30 will be explained.

The harvesting part 30 is operated to ascend and descend between a descending working state where the bottom of the harvesting frame 33 connected to the front end of the feeder 31 descends to near the ground and an ascending non-working state where the harvesting frame 33 ascends to above the ground by the up-and-down swing operation of the feeder 31 by the elevating pressure cylinder 32. The traveling body is caused to travel with the harvesting unit 30 lowered to the lowered operation state, and the harvesting unit 30 divides the planted grain stalks into planted grain stalks to be harvested and planted grain stalks not to be harvested by a pair of left and right grain dividing bodies 34, 34 provided at the front end portion of the harvesting frame 33, the ears of the planted grain stalks of the harvest object are raked up above the transverse conveying screw conveyor 36 by the rotary drum 35, the planted grain stalks of the harvest object are harvested by the pusher-type harvesting device 37, the harvested grain stalks are concentrated to the middle part of the transverse conveying screw conveyor 36 by the left and right spiral plates 36a of the transverse conveying screw conveyor 36, the collected harvested stalks are fed from the trunk to the ear to the conveyance start end of the feeder 31 by a raking arm 38 provided at the middle part of the lateral conveying screw conveyor 36, and are conveyed to the rear by the feeder 31 and fed into the threshing device 10.

The threshing apparatus 10 will be explained.

Fig. 5 is a right lateral side view showing the threshing device 10. Fig. 6(a) is a front view showing the threshing device 10. As shown in these drawings, and fig. 3 and 4, the threshing device 10 is disposed on the left side of the traveling machine body. The threshing device 10 includes a threshing unit 10b provided at an upper portion of the threshing machine body 10a, and the threshing process is performed on the harvested stalks supplied from the feeder 31 by the threshing unit 10 b.

That is, the threshing part 10b includes a threshing chamber 11 provided in the upper part of the threshing machine body 10a, and a threshing cylinder 12 provided in the threshing chamber 11 so as to be rotatable about a threshing cylinder shaft core 12a toward the front and rear of the running machine body, the whole of the harvested grain stalks from the trunk to the ear is thrown into the threshing chamber 11 by a feeder 31, the harvested grain stalks thrown into the threshing chamber 11 are conveyed to the rear side of the threshing chamber by the rotating threshing cylinder 12 and subjected to threshing processing, and the threshing straw is discharged to the rear of the running machine body from a dust discharge port 13 (see fig. 4) provided in the rear part of the threshing machine body 10 a.

The threshing device 10 includes a sorting unit 10c provided in a lower portion of the threshing machine body 10a, and the threshing processed matter is supplied from the threshing chamber 11 to the sorting unit 10c via the receiving net, the threshing processed matter supplied to the sorting unit 10c is sorted into grains and dust by the sorting air and the swing sorting device, the first processed matter of the grains is supplied to the winnowing device 40 provided outside the threshing machine body by the first screw conveyor 14 (see fig. 6), and the second processed matter of the grains is supplied to the reduction device 50 provided outside the threshing machine body by the second screw conveyor 15 (see fig. 8).

As shown in fig. 5 and 7, a top plate 16 covering the upper part of the threshing chamber 11 is supported by the threshing machine body 10a via a pivot structure having an opening/closing axis X, and the threshing chamber 11 can be opened and closed at a position above the threshing cylinder 12. The opening/closing axis X of the top plate 16 is disposed at one end side of the threshing machine body 10a in the transverse direction of the machine body toward the front and rear of the machine body.

Fig. 6(b) is a vertical sectional front view of the top plate 16 showing the closed posture. Fig. 7(a) is a front view of the threshing device 10 in a state where the threshing chamber 11 is closed. As shown in these figures, when the operation top plate 16 is swung downward around the opening/closing axis X, and the top plate frame 16a located on the free end side of the top plate 16 and facing the front and rear of the traveling machine body (facing the front and rear of the threshing device) is brought into contact with and supported by the upper surface of the threshing machine body frame 17 located on the opposite side of the opening/closing axis X with respect to the threshing cylinder axis 12a and facing the traveling machine body to the threshing machine body 10a, the top plate 16 is in a closed posture to close the threshing chamber 11. When the top plate 16 is in the closed position, the top plate 16 can be fixed in the closed position by coupling the screw-type lock member 18 supported by the support member 18a provided on the top plate side to the lock member 17a provided on the thresher body side. The lock members 18 are provided at a plurality of locations in the front-rear direction of the roof panel 16 (the front-rear direction of the travel machine body).

Fig. 7(b) is a front view of the threshing device 10 in a state where the threshing chamber 11 is opened. As shown in the drawing, when the operation top plate 16 is lifted and swung around the opening/closing axis X, the top plate 16 is opened to open the threshing chamber 11.

The reduction apparatus 50 will be explained.

Fig. 8(a) is a rear view showing the reducing device 50, and fig. 8(b) is a perspective view showing the reducing device 50 in a state where the screw conveyor 55 is opened. As shown in these drawings and fig. 5, the reducing device 50 is provided over the conveying terminal end of the two screw conveyors 15 and the reducing port 11a provided at the upper part of the side wall of the threshing machine body 10a, and reduces the two processed materials sent out from the sorting unit 10c of the threshing device 10 to the threshing chamber 11.

That is, the reduction device 50 includes a conveyance processing box 52 attached to the outer surface side of the thresher body 10a, and a processing conveyor 53 provided integrally and rotatably at the end of the screw shaft 15a of the two-stage screw conveyor 15 and driven to rotate inside the conveyance processing box 52, wherein the unprocessed pellets in the two-stage processed matter from the two-stage screw conveyor 15 are subjected to the cleaning processing by the threshing action of the processing conveyor 53 and a fixed processing body (not shown) fixed inside the conveyance processing box 52, and the processed two-stage processed matter is sent out to the outlet side of the conveyance processing box 52 by the conveyance action of the processing conveyor 53.

The reduction device 50 includes a screw conveyor 55, a lower end side of the screw conveyor 55 is connected to an outlet side of the conveyance processing box 52, an upper end side thereof is connected to an upper portion of a side wall of the threshing machine body 10a, two processed objects fed from the conveyance processing box 52 to a conveyance start end portion of the screw conveyor 55 are thrown to a discharge tube 56 by the screw conveyor 55, and two processed objects reaching the discharge tube 56 are fed from a reduction port 11a of the threshing machine body 10a to a front end side of the threshing chamber 11 by a bounce of a discharge plate 57 provided at an end portion of a screw shaft 58a of the screw conveyor 55 so as to be rotatable integrally.

The conveying cylinder 59 of the screw conveyor 55 in the reduction device 50 is configured to be freely divided into two half-opened conveying cylinders 59a and 59a divided in the radial direction, and the screw conveyor 55 can be opened and closed by attaching and detaching the two half-opened conveying cylinders 59 a.

That is, as shown in fig. 8(b), the two half-open conveying cylinders 59a include a half-open conveying cylinder main body 59b having a semicircular cross section and connecting flange portions 59c provided at both end portions of the half-open conveying cylinder main body 59 b. The connecting flanges 59c at both ends are integrally formed on the half-open conveying cylinder main body 59 b. The connecting flange portions 59c at both ends are provided over the entire length of the half-open conveying cylinder main body 59 b.

By releasing the fastening of the two half-opened conveying cylinders 59a by the fastening bolts 59e as fastening means attached to the bolt holes 59d provided in the fastening flange portion 59c, the two half-opened conveying cylinders 59a are detached from the annular support portions 52a, 56a provided in the conveying treatment tank 52 and the discharge cylinder 56, and the screw conveyor 55 is opened and the screw 58 is exposed.

As shown in fig. 8(a), the two half-open conveying cylinders 59a are assembled to the screw 58 so as to sandwich the screw 58 from both lateral sides, and the coupling flange portions 59c that are brought into contact with each other are fastened and coupled to each other by the coupling bolts 59e, whereby the two half-open conveying cylinders 59a can be assembled to the supporting portions 52a and 56a of the conveying treatment tank 52 and the discharge cylinder 56 in a state of being in the form of the conveying cylinders 59, and the screw conveyor 55 can be in a closed state.

The grain raising means 40 will be explained.

As shown in fig. 5 and 6, the winnowing device 40 is provided over the conveying end portion of the first screw conveyor 14 and the grain inlet 21 located above the wall surface 20a on the front side of the grain box 20, winnowing the threshing grains as the first processed object fed from the sorting unit 10c of the threshing device 10 by the first screw conveyor 14 to the front side of the upper portion on the front end side of the grain box 20, and supplying the grain box 20 from the grain inlet 21.

In the grain thrower 40, the grain thrower 40 includes a bucket conveyor 41 for receiving the threshed grains from the first-pass screw conveyor 14 and throwing them laterally toward the upper part of the front end side of the grain thrower 10, a screw conveyor 43 for receiving the threshed grains from the bucket conveyor 41 via a middle drum 42 and throwing them forward toward the upper part of the front end side of the grain box 20, and a spreader 44 for feeding the threshed grains from the screw conveyor 43 into the grain box 20 from the grain inlet 21.

As shown in fig. 5, 6, and 9, the spreader 44 includes a spreader case 44a having an inlet connected to the conveyance end portion of the screw conveyor 43, and an impeller 44b rotatably provided inside the spreader case 44a, and discharges the degranulated grain, which is sent from the screw conveyor 43 to the inside of the spreader case 44a, from a grain discharge tube 44c provided in the spreader case 44a and sent to the grain box 20 by the bounce of the impeller 44b driven to rotate by an electric spreader motor 45.

The grain discharge drum 44c can be changed to the supply position a and the drum swing position B by supporting the dispenser casing 44a so as to be rotatable about the screw shaft core of the screw conveyor 43, engaging a gear portion provided on the outer peripheral portion of the dispenser casing 44a with an output gear of the electric discharge drum motor 46, and interlocking the dispenser casing 44a with the discharge drum motor 46.

Fig. 9(a) is a cross-sectional plan view of the grain discharging tube 44c in a state where the position is changed to the supply position a. As shown in the figure, the grain discharge drum 44c is rotated in a forward rotation direction by the operation of the discharge drum motor 46 in the spreader box 44a, and is changed to the position a for supply. The grain discharge tube 44c whose position is changed to the supply position a is in a state where the end side thereof is extended into the grain inlet 21 of the grain tank 20, and discharges the degranulated grain from the impeller 44b into the grain tank 20 without overflowing to the outside of the grain tank 20.

Fig. 9(B) is a cross-sectional plan view showing the grain discharging tube 44c in a state where the position is changed to the box swinging position B. As shown in the figure, the grain discharge drum 44c is rotated in a reverse rotation direction by the operation of the discharge drum motor 46 in the spreader box 44a, and is changed to a box swing position B. The grain discharge tube 44c whose position is changed to the box swinging position B is in a state where the whole grain discharge tube is discharged outside the grain inlet 21.

That is, the wall surface 20a of the grain tank 20 provided with the grain inlet 21 is along a direction intersecting with the lifting axis Y of the grain tank 20 described later. Therefore, the grain discharge tube 44c is prevented from coming into contact with the front side wall of the grain box 20 that swings and rises by changing the position to the box swing position B.

A grain tank 20 is illustrated.

As shown in fig. 6 and 7, the grain tank 20 includes a discharge-side tank section 20b having a bottom located laterally to the threshing device 10, and a protruding tank section 20c protruding from the discharge-side tank section 20b toward the threshing device. The grain tank 20 includes a grain discharge port 25 provided in a side wall 20d on the lateral outer side of the discharge-side tank unit 20 b.

As shown in fig. 6 and 10, the grain tank 20 is pivotally supported by a support structure 62 having a pair of front and rear support members 60 and 60 disposed in a dispersed manner on the front and rear sides of the discharge-side tank unit 20b, and is lifted and lowered by swinging about a lifting axis Y located at the bottom of the discharge-side tank unit 20b in the front and rear directions toward the travel machine body.

The support structure 62 is disposed on the traveling machine body laterally of the threshing device 10. The support structure 62 includes a plurality of strut members 62a erected on the body frame F of the traveling body, beam members as support members 62b connected to the strut members 62a and facing the front and rear of the traveling body, beam members as support members 62c connected to the support members 62b and facing the lateral direction of the traveling body, and a pair of front and rear support bodies 60, 60 projecting from the front and rear support members 62c toward the upper side of the traveling body. The support structure 62 has a frame structure in which the stay member 62a and the support members 62b and 62c are combined as a frame body. The support member 62c facing the traveling machine body in the lateral direction is connected to the machine body wall of the threshing device 10 over the support member 62 b. The pair of front and rear support members 60, 60 support the spindle portion 22 provided on the front wall surface 20a and the rear wall surface of the grain box 20 so as to be rotatable about the lifting axis Y.

A hydraulic pressure cylinder 61 is connected to a lower portion of the grain tank 20. The pressure cylinder 61 is provided at a position arranged in the transverse inner and outer directions of the traveling machine body with respect to the threshing device 10 when viewed from the direction of the lifting axis of the grain tank 20, and at a position located below the grain tank 20. More specifically, the cylinder 61 is attached to a cylinder support portion provided in a portion of the lower surface side of the discharge side box portion 20b of the grain box 20 close to the lifting axis Y and a cylinder support portion 62d provided in the column member 62a constituting the support structure 62. The pressure cylinder 61 is provided so that the side opposite to the side connected to the grain tank 20 enters the inside of the support structure 62.

That is, the grain tank 20 can be operated by the pressure cylinder 61 to swing up and down about the lifting axis Y to the storage posture and the discharge posture.

As shown in fig. 6 and 7, leg members 23 protruding downward from the grain tank 20 are provided at a plurality of locations in the front-rear direction of the travel machine body (the front-rear direction of the grain tank 20) on the free end side of the grain tank 20 (the side opposite to the side where the elevating axis Y is located, the protruding end side of the protruding tank portion 20 c). Each leg 23 is provided to protrude downward from a box frame located on the lower surface side of the grain box 20. A plurality of box support portions 17b are provided on a threshing machine frame 17 of the threshing machine body 10a, which is disposed at a position of the threshing machine body 10a opposite to the side where the lifting axis Y is located with respect to the threshing cylinder axis 12a, in the front and rear directions of the traveling machine body (in the front and rear directions of the threshing device). The box support portions 17b are arranged in a dispersed manner in the front-rear direction of the travel machine body, and each of them serves to receive the leg members 23 of the grain box 20.

Fig. 7(a) is a front view showing the grain tank 20 in the storage posture. As shown in the figure, the grain tank 20 is operated by the pressure cylinder 61 to swing downward above the threshing device 10, and the grain tank is set in a storage posture so as to store the threshed grains from the threshing device 10.

As shown in fig. 6(b), when the grain tank 20 is in the storage posture, the lower end sides of the plurality of leg members 23 of the grain tank 20 are placed on the tank support portion 17b of the thresher frame 17, and the free end side of the grain tank 20 is supported by the thresher frame 17 via the leg members 23 and the top plate frame 16 a.

When the grain tank 20 is in the storage posture, the bottom wall 24a of the extended tank portion 20c of the grain tank 20 is horizontally or substantially horizontally located at a position higher than the top plate 16 of the threshing device 10, and the bottom wall 24b of the discharge-side tank portion 20b of the grain tank 20 is horizontally or substantially horizontally located at the lateral side of the threshing device 10 at a position lower than the bottom wall 24a of the extended tank portion 20 c.

Fig. 7(b) is a front view of the grain tank 20 in the discharging position. As shown in the figure, when the grain tank 20 is operated by the pressure cylinder 61 and swings upward from the storage posture to the traveling machine body lateral side (right side) opposite to the traveling machine body lateral side where the threshing device 10 is located, the grain tank is set to the discharge posture so as to discharge the stored threshed grains.

That is, when the grain tank 20 is in the discharging posture, the side wall 20d provided with the grain outlet 25 is directed obliquely downward toward the lateral outside of the travel machine body, and the threshed grains in the tank are discharged from the grain outlet 25 by natural falling. That is, when the grain tank 20 is in the discharge posture, the bottom wall 24b of the discharge side tank part 20b is in the inclined posture which becomes lower toward the grain discharge port, and the bottom wall 24a of the extension tank part 20c is in the inclined posture which becomes lower toward the discharge side tank part, and the degranulated grain remaining in the discharge side tank part 20b is discharged from the grain discharge port 25 by the natural fall by the inclination of the bottom wall 24b, and the degranulated grain remaining in the extension tank part 20c is moved to the discharge side tank part 20b by the natural fall by the inclination of the bottom wall 24c and is discharged from the grain discharge port 25.

Fig. 12 is an explanatory diagram showing the arrangement of the grain tank 20 with respect to the travel machine body. The triangle 65 shown in fig. 12 is a triangle in which the contact points 1a of the pair of front wheels 1, 1 on the left and right and the rolling fulcrums 7 provided on the rear wheel support frame 5 are three corners. The position of the center of gravity G1 shown in fig. 12 indicates the position of the center of gravity of the grain box 20 in the storage posture, and the position of the center of gravity G2 shown in fig. 12 indicates the position of the center of gravity of the grain box 20 in the discharge posture. As shown in the figure, the grain box 20 is equipped such that the center of gravity G1 in the storage posture and the center of gravity G2 in the discharge posture are located inside the triangle 65.

As shown in fig. 7, the threshing apparatus 10 supporting the top plate 16 to be swingable to open and close is set at a position near the lifting axis Y, and the swinging direction of the grain tank 20 when lifted to the discharging posture as viewed along the lifting axis Y is the same as or substantially the same as the swinging direction of the top plate 16 when lifted to the opening posture as viewed along the opening and closing axis X. Therefore, the grain tank 20 raised to the discharge posture does not hinder the raising of the top plate 16, and the raising angle of the top plate 16 from the closed posture to the open posture is increased, so that the opening of the threshing chamber 11 is enlarged.

As shown in fig. 11, an opening adjusting means 70 having three covers 71 and 72 is provided in the grain discharge port 25, and the opening area and the opening width of the grain discharge port 25 can be adjusted by changing the opening adjusting means 70.

That is, as shown in fig. 10 and 11, the grain discharge port 25 is provided over the entire width (the width in the front-rear direction of the travel machine body) or substantially the entire width of the side wall 20 d. The grain outlet 25 is disposed at the lower portion of the side wall 20d so that the lower end edge thereof is continuous with the bottom wall 24b of the grain box 20.

The three covers 71, 72 are arranged in the lateral width direction of the grain outlet 25, i.e., the front-rear direction of the travel machine body. The three lid bodies 71 and 72 are supported by the side wall 20d via hinges 73 disposed on the upper end sides of the lid bodies 71 and 72, and swing open and close around an opening and closing axis Z extending in the lateral width direction of the grain discharge port, that is, around an opening and closing axis Z extending in the front-rear direction of the travel machine body, as the grain box 20 swings up and down, thereby opening and closing the grain discharge port 25. The three covers 71 and 72 divide the grain discharge opening 25 into three divided discharge openings 25a and 25b in the lateral width direction (the front-rear direction of the travel machine body), and are opened and closed by independently swinging and opening and closing.

Among the three covers 71 and 72, the covers 72 at both ends are configured to be lockable in the closed posture by lock pins 74 provided on the lower end side, or to be able to release the closed locking by the lock pins 74. That is, the tip end side of the lock pin 74 is engaged with the pin hole provided on the side of the side wall 20d by the slide operation of the lock spring 75, and the lock state is established. By a manual operation against the lock spring 75, the distal end side of the lock pin 74 is disengaged from the pin hole on the side of the side wall 20d, and the shank portion is locked to the bracket 76, thereby bringing the lock-released state.

Therefore, the opening adjusting means 70 changes and adjusts the lateral width and the opening area of the grain discharge port 25, and releases the closing lock by the lock pins 74 of the covers 72 at both ends in advance, thereby allowing the three covers 71 and 7 to swing to the open position by hanging down with the upward swing of the grain tank 20 to the discharge position, and the lateral width of the grain discharge port 25 of the grain tank 20 in the discharge position becomes the lateral width corresponding to the sum of the lateral widths of the three divided discharge ports 25a and 25b, and the opening area of the grain discharge port 25 of the grain tank 20 in the discharge position becomes the opening area corresponding to the sum of the opening areas of the three divided discharge ports 25a and 25 b. When the three covers 71 and 72 are opened, the grain outlet 25 has a size in the lateral width direction (the front-rear direction of the grain box) that extends over the entire width of the side wall 20d (the entire length of the grain box in the front-rear direction).

The opening adjusting means 70 changes and adjusts the lateral width and the opening area of the grain discharge port 25, and closes and locks the covers 72 at both ends with the locking pins 74 in advance, and allows only the central cover 71 to swing to the open position by hanging down with the upward swing of the grain tank 20 to the discharge position, so that the lateral width of the grain discharge port 25 of the grain tank 20 in the discharge position is reduced to the lateral width of the central divided discharge port 25a, and the opening area of the grain discharge port 25 of the grain tank 20 in the discharge position is reduced to the opening area of the central divided discharge port 25 a.

The opening adjusting means 70 changes and adjusts the lateral width and the opening area of the grain discharge port 25, and closes and locks only one of the covers 72 at both ends by the lock pin 74 in advance, and allows the central cover 71 and the cover 72 at the other end to swing to the open position by hanging down with the upward swing of the grain tank 20 to the discharge position, so that the lateral width of the grain discharge port 25 of the grain tank 20 in the discharge position is reduced to the lateral width corresponding to the sum of the lateral widths of the central divided discharge port 25a and the other divided discharge port 25b, and the opening area of the grain discharge port 25 of the grain tank 20 in the discharge position is reduced to the opening area corresponding to the sum of the opening areas of the central divided discharge port 25a and the other divided discharge port 25 b.

As shown in fig. 7 and 11, a discharge pipe 80 is provided outside the discharge-side box section 20b of the grain box 20. The discharge pipe 80 is pivotally supported by the grain box 20 so as to be vertically swung around a pivot axis P disposed on the rear end side toward the front and rear of the traveling machine body and to be switched between a use posture and a storage posture, and guides the grain-removed grains discharged from the grain box 20 to fall toward a receiving side such as a carriage box, and presses and holds the lid bodies 71 and 72 in a closed posture.

That is, the chute 80 includes a bottom plate constituting a chute body 80a, and vertical plates 80b standing on both end sides in the traveling machine body front-rear direction (grain box front-rear direction) of the bottom plate.

Fig. 7(b) is a front view showing the discharge pipe 80 in the use posture. As shown in the drawing, when the bending lock by the lock mechanism 82 provided in one of the pair of flexion- extension link mechanisms 81, 81 provided in the front and rear sides of the discharge pipe 80 across the discharge pipe 80 and the grain box 20 is released, the discharge pipe 80 descends and swings around the pivot axis P by its own weight, and when the flexion-extension link mechanism 81 is in the extended state, the discharge pipe 80 assumes the use posture. When the discharge pipe 80 is in the use posture, it is in a state of being extended from the grain box 20 to the outside, and is in a state of being held in the use posture by the tensile support by the flexible link mechanism 81 in the extended state, and the threshed grains discharged from the grain discharge port 25 of the grain box 20 are prevented from overflowing from the discharge pipe main body 80a by the vertical plate 80b, and are guided by the discharge pipe main body 80a to fall toward the carriage box or the like.

Fig. 7(a) is a front view showing the discharge pipe 80 in the storage posture. As shown in the figure, when the dump tube 80 is operated to swing upward and the flexible link mechanism 81 is in a bent state, the dump tube 80 is retracted toward the grain box side to be in a storage posture. As shown in fig. 7(a) and 10(a), when the discharge pipe 80 is in the storage posture, the longitudinal plates 80b on the front and rear sides enter the inside of the body of the grain box 20 from the front and rear sides thereof to the side walls 20d, the discharge pipe main body 80a is covered on the outside of the grain discharge port 25 along the side walls 20d of the grain box 20, and is brought into contact with the outer surface sides of the covers 71 and 72 on both ends and in the center to perform a pressing action, thereby holding the cover 71 without the center of the lock pin 74 in the closed posture and holding the covers 72 on both ends in the closed posture even if the lock pin 74 fails.

An operation system of the grain tank 20 and the like will be explained.

Fig. 13 is a block diagram showing an operation system of the grain tank 20, the winnowing device 40, and the threshing clutch 85. As shown in the figure, the operation position of the box lever 86 is detected by a box lever detection switch 87, the operation position of the threshing clutch lever 88 is detected by a clutch lever detection switch 89, and in a control device 90 in which the box lever detection switch 87 and the clutch lever detection switch 89 are associated with each other, the pressure cylinder 61 for operating the grain box 20 to swing, the discharge cylinder motor 46 for operating the grain discharge cylinder 44c of the grain winnower 40 to swing, the spreader motor 45 for driving the spreader 44 of the grain winnower 40, and the electrically-operated clutch motor 91 are associated with each other. In the control device 90, the valley clutch detection switch 92 and the tank posture detection switch 93 are associated with each other.

The threshing clutch 85 is operated to switch between an on state in which the threshing device 10 is interlocked with the engine 4a and an off state in which the threshing device 10 is blocked from interlocking with the engine 4a, and thereby the threshing device 10 is operated to be driven and stopped. The clutch motor 91 operates the operation unit of the threshing clutch 85 to drive the same, and operates the threshing clutch 85 to switch between an on state and an off state. The threshing clutch detection switch 92 detects the on state and off state of the threshing clutch 85, and outputs detection information to the control device 90. The box posture detection switch 93 detects the storage posture and the discharge posture of the grain box 20, and outputs detection information to the control device 90.

The control device 90 is constituted by a microcomputer, and includes a tank control unit 94, a clutch drag unit 95, a clutch control unit 96, a spreader control unit 97, a discharge tube control unit 98, and a tank drag unit 99.

The tank control unit 94 is configured to control the cylinder 61 to switch the grain tank 20 between the storage posture and the discharge posture corresponding to the operation position of the tank lever 86, based on the detection information input from the tank lever detection switch 87. The tank stopper unit 99 determines whether the threshing clutch 85 is in the on state or the off state based on the detection information from the threshing clutch detection switch 92, and allows the tank control unit 94 to control the driving of the cylinder 61 to the discharge side and the storage side when the threshing clutch 85 is determined to be in the off state. The tank check unit 99 is configured to check the drive control of the cylinder 61 to the discharge side and the storage side by the tank control unit 94 when it is determined that the valley-disengaging clutch 85 is in the on state.

Therefore, when the threshing clutch 85 is in the off state by switching the tank lever 86 to the storage position [ storage ] by a human operation, the tank control unit 94 controls the pressure cylinder 61 to be driven to the storage side even if the tank drag unit 99 does not perform the drag function any more, and the posture of the grain tank 20 can be changed to the storage posture.

Even if the box lever 86 is switched to the storage position [ storage ], if the threshing clutch 85 is in the on state, the box drag unit 99 performs a drag function, and the box control unit 94 does not control the cylinder 61 to be driven to the storage side, and cannot change the posture of the grain box 20 to the storage posture.

When the threshing clutch 85 is in the off state by switching the bin lever 86 to the discharge position [ discharge ] by a human operation, the bin control unit 94 controls the pressure cylinder 61 to be driven to the discharge side even if the bin drag unit 99 does not perform the drag function any more, and the posture of the grain bin 20 can be changed to the discharge posture.

Even if the tank lever 86 is switched to the discharge position [ discharge ], if the threshing clutch 85 is in the on state, the tank stopper 99 functions as a stopper, and the control unit 94 does not control the driving of the cylinder 61 to the discharge side, and cannot change the posture of the grain tank 20 to the discharge posture.

Therefore, the tank lever 86 is a tank operation unit that can be manually operated, and operates the pressure cylinder 61 to switch the grain tank 20 between the storage posture and the discharge posture.

The clutch control unit 96 is configured to control the switching of the valley clutch 85 to the on state and the off state corresponding to the operation position of the valley clutch lever 88, based on the detection information input from the clutch lever detection switch 89. The clutch drag unit 95 determines whether or not the grain tank 20 is in the storage posture based on the detection information from the tank posture detection switch 93, and if it determines that the grain tank 20 is in the storage posture, the drag clutch control unit 96 controls the switching of the threshing clutch 85 to the on state. The clutch drag unit 95 is configured to allow the switching control of the threshing clutch 85 to the on state by the clutch control unit 96 when it is determined that the grain tank 20 is in the storage posture.

Therefore, when the threshing clutch lever 88 is operated to switch to the on position [ on ] by a manual operation and the grain tank 20 is in the storage posture, the clutch control unit 96 controls the clutch motor 91 to drive to the on side even if the clutch drag unit 95 no longer performs the drag action, and can operate the threshing clutch 85 to switch to the on state to drive the threshing device 10.

Even if the threshing clutch lever 88 is operated to switch to the on position [ on ], if the grain tank 20 is in the storage posture, the clutch drag means 95 acts as a drag, the clutch control means 96 does not control the clutch motor 91 to drive to the on side, the threshing clutch 85 does not switch to the on state, and the threshing device 10 cannot be driven.

The threshing clutch lever 88 is switched to the off position [ off ] by a manual operation, the clutch control unit 96 controls the clutch motor 91 to drive to the off side, the threshing clutch 85 is switched to the off state, and the threshing device 10 is stopped.

The drain cylinder control unit 98 determines whether the threshing clutch 85 has been switched to the on state or whether the threshing clutch 85 has been switched to the off state, based on the detection information of the threshing clutch detection switch 92. When determining that the threshing clutch 85 is switched to the on state, the discharge cylinder control unit 98 controls the discharge cylinder motor 46 to drive to the supply side and switches the grain discharge cylinder 44c to the supply position a. When determining that the threshing clutch 85 is not switched to the on state, the discharge reel control unit 98 controls the discharge reel motor 46 to be maintained at the box swing side and the grain discharge reel 44c to be maintained at the box swing position B. The discharge cylinder control unit 98 controls the discharge cylinder motor 46 to drive to the box swing side to switch the grain discharge cylinder 44c to the box swing position B when it is determined that the off-grain clutch 85 is switched to the off-state, and controls the discharge cylinder motor 46 to maintain the supply side to maintain the grain discharge cylinder 44c to the supply position a when it is determined that the off-grain clutch 85 is not switched to the off-state. Therefore, the discharge reel control means 98 is associated with switching of the threshing clutch 85 to the off state, and is associated with the threshing clutch 85 and the grain discharge reel 44c such that the grain discharge reel 44c is switched to the box swing position B.

The spreader control unit 97 determines whether the threshing clutch 85 is in an on state based on the detection information of the threshing clutch detection switch 92, controls the spreader motor 45 to drive when determining that the threshing clutch 85 is in the on state, and controls the spreader motor 45 to stop when determining that the threshing clutch 85 is not in the on state.

Therefore, when the threshing clutch lever 88 is operated to switch to the on position [ on ] and the threshing clutch 85 is switched to the on state, the grain discharging drum 44c is naturally switched to the supply position by the drive control of the discharging drum motor 46 to the supply side by the discharging drum control unit 98, and the spreader 44 is naturally driven by the drive control of the spreader motor 45 by the spreader control unit 97.

Even when the threshing clutch lever 88 is operated to switch to the on position [ on ], and the threshing clutch 85 is not switched to the on state by the drag action of the clutch drag unit 95, the grain discharge drum 44c is positioned at the tank swing position B without switching to the supply position a by the stop control of the tank swing side of the discharge drum motor 46 by the discharge drum control unit 98, and the spreader 44 is stopped without being driven by the stop control of the spreader motor 45 by the spreader control unit 97.

[ other modes for carrying out the embodiment 1]

(1) Fig. 14(a) is a rear view of a grain box 20 having another embodiment of the structure in a stored state. Fig. 14(b) is a side view of the grain box 20 in a stored state having another embodiment structure. Fig. 14(c) is a rear view of the grain tank 20 having another embodiment structure in a discharge state. Fig. 14(d) is a side view of the grain tank 20 having another embodiment structure in a discharge state. As shown in these drawings, the grain tank 20 having another embodiment structure includes an upper structure 20U constituting an upper portion of the grain tank 20 and a bottom structure 20D constituting a bottom portion of the grain tank 20.

The upper structure 20U is supported in a fixed state on the body frame side of the traveling body. The upper structure 20U includes a pair of front and rear side walls 20e and 20e constituting a pair of front and rear side walls of the grain box 20, a pair of left and right side walls 20d and 20d constituting a pair of left and right side walls of the grain box 20, and an upper wall 20f constituting an upper wall of the grain box 20. A grain inlet 21 is provided in the upper part of the front side wall 20e, and a grain discharge tube 44c of the winnowing device 40 is communicated with the grain inlet 21.

The bottom structure 20D includes a bottom wall 20g, and a pair of front and rear sealing walls 20h, 20h rising from the front and rear sides of the bottom wall 20 g. The bottom structure 20D is pivotally supported by the front and rear side walls 20e, 20e of the upper structure 20U via a connecting shaft 26 disposed on one end side in the traveling machine body lateral direction of the pair of front and rear seal walls 20h, and swings and rises around a lift shaft center Y1 toward the traveling machine body front and rear side provided in the connecting shaft 26, and switches between the storage posture and the discharge posture.

One end sides of a pair of front and rear opening and closing cylinders 27, 27 arranged on the front and rear sides of the grain tank 20 are supported by cylinder supports provided on front and rear side walls 20e of the upper structure 20U, the other end sides of the pair of front and rear opening and closing cylinders 27, 27 are supported by cylinder supports provided on the front and rear sides of the bottom structure 20D, the bottom structure 20D is operated by the pair of front and rear opening and closing cylinders 27, 27 to switch the holding posture and the discharging posture, the grain tank 20 is switched to the holding state, the threshed grains from the grain raising device 40 are held, the grain tank 20 is switched to the discharging state, and the threshed grains are discharged from the grain tank 20.

That is, as shown in fig. 14(c) and 14(D), when the bottom structure 20D is lowered around the lifting axis Y1 by the operation of the open/close cylinder 27, the bottom structure 20D is switched to the discharge posture, and the grain tank 20 is in the discharge state. The grain tank 20 in the discharge state has a grain discharge port 25 formed by a side wall 20d, a bottom wall 20g and a sealing wall 20h at a lateral end portion on the lateral side of the traveling body opposite to the side where the elevating shaft axis Y1 is located, and the threshed grains in the tank are discharged from the grain discharge port 25 by natural outflow. At this time, the grain box 20 is sealed by the sealing wall 20h so that the grains do not leak between the front and rear side walls 20e and the bottom wall 20 g.

As shown in fig. 14(a) and 14(b), when the bottom structure 20D is raised around the raising/lowering axis Y1 by operating the open/close cylinder 27, the bottom structure 20D is switched to the storage posture, and the grain tank 20 is placed in the storage state. The grain box 20 in the retained state closes the grain outlet 25 by the rise of the bottom structure 20D, and retains the threshed grain from the winnowing device 40.

(2) In the above-described embodiment, the grain tank 20 and the bottom structure 20D constituting the bottom are pivotally supported and lifted up and down in the storage posture and the discharge posture, but may be supported by a link mechanism so as to be swingable and lifted up and down and be swung up and down in the storage posture and the discharge posture.

(3) In the above-described embodiment, the example in which the grain tank 20 is configured to be switched to the discharge posture by being raised from the swing of the storage posture has been described, but the configuration may be such that the grain tank is switched to the discharge posture by being lowered from the swing of the storage posture.

(4) In the above embodiment, the grain tank 20 is disposed such that the lifting axis Y is oriented in the front and rear of the travel machine body, and the grain discharge port 25 is provided in the side wall 20d on the lateral side of the grain tank 20, but the grain discharge port 25 may be provided in the side wall on the rear side of the grain tank 20 such that the lifting axis is oriented in the lateral direction of the travel machine body.

(5) In the above-described embodiment, the opening of the grain discharge port 25 is adjusted by the three covers 71 and 72, but the opening may be adjusted by sliding the cover by providing one cover that can be slid freely at the grain discharge port 25. Further, the opening of the grain discharge port may be adjusted by changing the height of the grain discharge port or changing the angle of the lid.

(6) In the above-described embodiment, the discharge chute 80 is provided to be swingably switched between the use posture and the storage posture, but may be configured to be switched between the use posture and the storage posture by a slide operation.

(7) The combine harvester of the above embodiment may be used in a combine harvester in which instead of the harvesting unit 30 being configured to harvest the planted straw in a one-stage harvesting state in which the planted straw is cut off near the ground, the threshing device 10 is configured to put the harvested straw into the threshing chamber 11 as a whole from the trunk of the plant to the ear, and the harvesting unit is configured to harvest the planted straw in a two-stage harvesting state in which the planted straw is cut off at two positions, the position near the ground and the position between the ground and the ear, and only the ear-head side of the harvested straw that is harvested in the two-stage harvesting is put into the threshing chamber.

[2 nd embodiment ]

Hereinafter, embodiment 2 of the present invention will be described with reference to fig. 15 to 32.

Fig. 15 is a right side view showing the whole of the combine harvester. Fig. 16 is a left side view showing the whole of the combine harvester. Fig. 17 is a plan view showing the whole of the combine harvester. Fig. 18 is a rear view showing the whole of the combine harvester. As shown in these drawings, the combine harvester includes a traveling body having a pair of left and right front wheels 101, 101 which are drivable, a pair of left and right rear wheels 102, 102 which are steerable, and a steering unit 103, a threshing device 110 and a grain tank 120 which are disposed behind the steering unit 103 and are provided on the traveling body, and a harvesting unit 130 having a feeder 131 which extends from the front of the threshing device 110 toward the front of the traveling body.

The combine harvester is used for harvesting rice, wheat, corn and the like. That is, the combine harvester harvests the rice, wheat, and other planted straws through the harvesting unit 130, removes the grains from the harvested straws through the threshing device 110, and recovers the removed grains into the grain box 120 to be left.

The traveling machine body will be explained.

The traveling machine body includes a prime mover 140, and the prime mover 140 has an engine 104a provided between the front wheels 101 and the rear wheels 102, and drives the pair of left and right front wheels 101, 101 to self-run by a driving force from the engine 104 a. The traveling machine body includes a driver part 103 located at the front of the machine body and a cab 103a provided in the driver part 103, and is of a riding type in which the traveling machine body is operated by riding in the cab of the driver part 103.

The cab 103 includes an entrance 103b provided on one of the left and right entrances 103b and 103b of the cab 103a, and a working step 103d provided on the other entrance 103 b. The step-up/down pedal 103c has a stepped structure.

As shown in fig. 18, a rear wheel support frame 105 facing the transverse direction of the machine body, which rotatably and steerably supports a pair of left and right rear wheels 102, 102 on both end sides, is supported by a support portion 106a provided on a connecting frame 106 facing the transverse direction of the machine body on the rear portion of a machine body frame F constituting the traveling machine body. The rear wheel support frame 105 is provided with a rolling fulcrum 107 formed by a rolling fulcrum shaft mounted to the support portion 106a and the rear wheel support frame 105 in the front-rear direction of the machine body, and the rear wheel support frame 105 swings up and down about the rolling fulcrum 107 with respect to the coupling frame 106, so that the pair of right and left rear wheels 102, 102 move away from and up and down with respect to the machine body frame F about the rolling fulcrum 107.

The harvesting unit 130 will be described.

The feeder 131 is operated to swing up and down by the lifting cylinder 132, and the harvesting unit 130 is operated to move up and down in a lowering operation state in which the harvesting frame 133 is lowered to a position close to the ground and in a lifting non-operation state in which the harvesting frame 133 is raised above the ground. By driving the traveling body in a state where the harvesting part 130 is lowered to a lowered operation state, the harvesting part 130 divides the planted grain stalks into planted grain stalks of a harvesting object and planted grain stalks of a non-harvesting object through a pair of left and right grain dividing bodies 134, 134 provided at a front end portion of the harvesting frame 133, the ear heads of the planted grain stalks of the harvest objects are raked above the lateral transverse conveying screw conveyor 136 through the rotary drum 135, and the planted straw of the harvest object is harvested by the pusher-type harvesting device 137, the harvested straw is concentrated toward the middle of the transverse conveying auger 136 by the left and right spiral plates 136a of the transverse conveying auger 136, the collected harvested straw plants are fed into the entire head of the ears by a raking arm 138 provided at the middle part of the horizontal conveying screw conveyor 136, and are fed to the transport start end of the feeder 131, and are transported backward by the feeder 131 and are thrown into the threshing device 110.

The threshing device 110 will be explained.

Fig. 19 is a right lateral side view showing the threshing device 110. Fig. 20(a) is a front view showing the threshing device 110. As shown in these drawings, and fig. 17 and 18, the threshing device 110 is disposed on the left side of the traveling machine body. The threshing device 110 includes a threshing unit 110b provided at an upper portion of the threshing machine body 110a, and the threshing process is performed on the harvested straws supplied from the feeder 131 by the threshing unit 110 b.

That is, the threshing part 110b includes a threshing chamber 111 provided in the upper part of the threshing machine body 110a, and a threshing cylinder 112 rotatably provided in the threshing chamber 111 around a threshing cylinder shaft core 112a toward the front and rear of the traveling machine body, the whole of the plant of the harvested grain stalks dried to the ear heads is thrown into the threshing chamber 111 by a feeder 131, the harvested grain stalks thrown into the threshing chamber 111 are conveyed to the rear side of the threshing chamber by the rotating threshing cylinder 112 and subjected to threshing treatment, and the threshing straw is discharged to the rear side of the traveling machine body from a dust discharge port 113 (see fig. 18) provided in the rear part of the threshing machine body 110 a.

The threshing device 110 includes a sorting unit 110c provided in a lower portion of the threshing machine body 110a, and the threshing processed matter is supplied from the threshing chamber 111 to the sorting unit 110c via the receiving net, the threshing processed matter supplied to the sorting unit 110c is sorted into grains and dust by the sorting air and the swing sorting device, the first processed matter of the grains is supplied to the winnowing device 140 provided outside the threshing machine body by the first screw conveyor 114 (see fig. 20), and the second processed matter of the grains is supplied to the reduction device 150 provided outside the threshing machine body by the second screw conveyor 115 (see fig. 24).

As shown in fig. 19 and 21, a top plate 116 covering the upper part of the threshing chamber 111 is supported by the threshing machine body 110a via a pivot structure having an opening/closing axis X, and the threshing chamber 111 can be opened and closed at a position above the threshing cylinder 112. The opening/closing axis X of the top plate 116 is provided on one end side of the threshing machine body 110a in the transverse direction of the running machine body, toward the front and rear of the running machine body.

Fig. 20(b) is a vertical sectional front view showing the top plate 116 in the closed position. Fig. 21(a) is a front view showing the threshing device 110 in a state where the threshing chamber 111 is closed. As shown in these drawings, when the operation top plate 116 is swung downward around the opening/closing axis X, and the top plate frame 116a located on the free end side of the top plate 116 toward the front and rear of the traveling machine body (toward the front and rear of the threshing device) is abutted and supported by the upper surface of the threshing machine body frame 117 located on the opposite side of the threshing machine body 110a from the side where the opening/closing axis X is located with respect to the threshing cylinder axis 112a, the top plate 116 is in the closed posture to close the threshing chamber 111. When the top plate 116 is in the closed position, the top plate 116 can be fixed in the closed position by coupling the screw-type lock 118 supported by the support member 118a provided on the top plate side to the lock member 117a provided on the thresher body side. The lock members 118 are provided at a plurality of locations in the front-rear direction of the top plate 116 (the front-rear direction of the travel machine body).

Fig. 21(b) is a front view showing the threshing device 110 with the threshing chamber 111 opened. As shown in the drawing, when the operation top plate 116 is lifted and swung around the opening/closing axis X, the top plate 116 is opened to open the threshing chamber 111.

The reduction apparatus 150 will be explained.

Fig. 24(a) is a rear view showing the reducing device 150, and fig. 24(b) is a perspective view showing the reducing device 150 in an opened state of the screw conveyor 155. As shown in these drawings and fig. 19, the returning device 150 is provided over the conveying terminal end of the two screw conveyors 115 and the returning opening 111a provided at the upper part of the side wall of the threshing machine body 110a, and returns the two processed materials fed from the sorting unit 110c of the threshing device 110 to the threshing chamber 111.

That is, the reduction apparatus 150 includes a conveyance processing box 152 attached to the outer surface side of the thresher body 110a, and a processing conveyor 153 provided at the end of the screw shaft 115a of the two-stage screw conveyor 115 so as to be rotatable integrally therewith and driven to rotate inside the conveyance processing box 152, and performs a cleaning treatment of the unprocessed pellets in the two-stage processed matter from the two-stage screw conveyor 115 by a threshing action of the processing conveyor 153 and a fixed processing body (not shown) fixed inside the conveyance processing box 152, and sends the processed two-stage processed matter to the outlet side of the conveyance processing box 152 by a conveying action of the processing conveyor 153.

The reducing device 150 includes a screw conveyor 155 having a lower end side connected to an outlet side of the conveyance processing box 152 and an upper end side connected to an upper portion of a sidewall of the threshing machine body 110a, and delivers the two processed objects fed from the conveyance processing box 152 to a conveyance start end portion of the screw conveyor 155 to the discharge tube 156 by the screw conveyor 155, and delivers the two processed objects reaching the discharge tube 156 to a front end side of the threshing chamber 111 from the reducing port 111a of the threshing machine body 110a by the bounce of a discharge plate 157 integrally rotatably provided at an end portion of a screw shaft 158a of the screw conveyor 155.

The conveying cylinder 159 of the screw conveyor 155 in the reduction device 150 is configured by two half-opened conveying cylinders 159a, 159a to be freely divided in the radial direction, and the screw conveyor 155 can be opened and closed by the attachment and detachment of the two half-opened conveying cylinders 159 a.

That is, as shown in fig. 24(b), the two half-open conveying cylinders 159a include a half-open conveying cylinder main body 159b having a semicircular cross section, and connecting flange portions 159c provided at both end portions of the half-open conveying cylinder main body 159 b. The connecting flanges 159c at both ends are integrally formed with the half-open conveying cylinder body 159 b. The connecting flange portions 159c at both ends are provided over the entire length of the half-open conveying cylinder body 159 b.

By releasing the fastening of the two half-open conveying cylinders 159a by the fastening bolts 159e as fastening means mounted in the bolt holes 159d provided in the fastening flange 159c, the two half-open conveying cylinders 159a are detached from the annular support portions 152a, 156a provided in the conveying process tank 152 and the discharge cylinder 156, and the screw conveyor 155 is opened and the screw 158 is exposed.

As shown in fig. 24(a), the two half-open transport cylinders 159a are aligned with the screws 158 so as to sandwich the screws 158 from both lateral sides, and the coupling flange portions 159c brought into contact with each other are fastened by the coupling bolts 159e, whereby the two half-open transport cylinders 159a can be assembled to the support portions 152a, 156a of the transport processing tank 152 and the discharge cylinder 156 in a state of being in the form of the transport cylinders 159, and the screw conveyor 155 is in a closed state.

The winnowing device 140 will be explained.

As shown in fig. 19 and 20, the winnowing device 140 is provided over the conveying end portion of the first screw conveyor 114 and the grain inlet 121 located at the upper portion of the front side wall 120a on the front side of the grain box 120, winnowing the threshing grains as the first processed object fed from the sorting unit 110c of the threshing device 110 by the first screw conveyor 114 to the front side of the upper portion on the front end side of the grain box 120, and supplying the threshing grains to the grain box 120 from the grain inlet 121.

In the grain thrower 140, the grain thrower 140 is provided with a bucket conveyor 141 for receiving the threshed grains from the first screw conveyor 114 and throwing them laterally toward the upper part of the front end side of the grain thrower 110, a screw conveyor 143 for receiving the threshed grains from the bucket conveyor 141 via a middle drum 142 and throwing them forward toward the upper part of the front end side of the grain box 120, and a spreader 144 for feeding the threshed grains from the screw conveyor 143 into the grain box 120 from the grain inlet 121.

As shown in fig. 19, 20, and 25, the spreader 144 includes a spreader case 144a having an inlet connected to the conveyance end portion of the screw conveyor 143, and an impeller 144b rotatably provided inside the spreader case 144a, and discharges the degranulated grain fed from the screw conveyor 143 into the spreader case 144a from a grain discharge tube 144c provided in the spreader case 144a and into the grain tank 120 by the bounce of the impeller 144b driven to rotate by an electric spreader motor 145.

The seed grain discharge drum 144c can be changed to the supply position a and the tank swing position B by engaging a gear portion provided on the outer periphery of the seed grain discharge drum 144a with an output gear of an electric discharge drum motor 146 and by linking the seed grain discharge drum 144a with the discharge drum motor 146 by rotatably supporting the seed grain discharge drum 144a around the screw shaft core of the screw conveyor 143.

Fig. 25(a) is a cross-sectional plan view of the grain discharging tube 144c in a state where the position is changed to the supply position a. As shown in the figure, the grain discharge drum 144c is rotated in a forward rotation direction by the discharge drum motor 146 in the spreader case 144a, and is changed to the supply position a. The grain discharge tube 144c whose position is changed to the supply position a is in a state where its projecting end side enters the grain inlet 121 of the grain tank 120, and discharges the threshed grains from the impeller 144b into the grain tank 120 without overflowing to the outside of the grain tank 120.

Fig. 25(B) is a cross-sectional plan view showing the grain discharging tube 144c in a state where the position is changed to the box swinging position B. As shown in the figure, the grain discharge drum 144c is rotated in a reverse direction by the discharge drum motor 146 when the spreader box 144a is operated, and is changed to the box swing position B. The grain discharge tube 144c whose position is changed to the box swinging position B is in a state where the whole is discharged outside the grain inlet 121.

That is, the front side wall 120a of the grain box 120, on which the grain inlet 121 is provided, is oriented in a direction intersecting with the lifting axis Y of the grain box 120, which will be described later. Therefore, the grain discharging tube 144c is prevented from abutting against the front side wall of the grain box 120 which swings and rises by changing the position to the box swinging position B.

The grain bin 120 is illustrated.

As shown in fig. 20 and 21, the grain tank 120 includes a discharge-side tank 120b having a bottom located laterally to the threshing device 110, and a protruding tank 120c protruding from the discharge-side tank 120b toward the threshing device.

As shown in fig. 20 and 26, the grain tank 120 is pivotally supported by a support structure 162 having a pair of front and rear supports 160 and 160 disposed in a dispersed manner on the front and rear sides of the discharge-side tank 120b, and is lifted and lowered by swinging about a lifting axis Y located at the bottom of the discharge-side tank 120b in the front and rear directions toward the travel machine body.

The support structure 162 is disposed on the traveling machine body laterally of the threshing device 110. The support structure 162 includes a plurality of strut members 162a erected on the body frame F of the traveling body, beam members as support members 162b connected to the strut members 162a and facing the front and rear of the traveling body, beam members as support members 162c connected to the support members 162b and facing the lateral direction of the traveling body, and a pair of front and rear support bodies 160, 160 projecting upward from the front and rear support members 162c toward the body. The support structure 162 is a frame structure in which the stay member 162a and the support members 162b and 162c are combined into a frame body. The support member 162c facing the travel machine body lateral direction is connected to the machine body wall of the threshing device 110 over the support member 162 b. The pair of front and rear supports 160 and 160 are supported so that the spindle portion 122 provided on the front side wall 120a on the front side and the rear side wall surface of the grain box 120 is rotatable about the lifting axis Y. The front support 160 is constituted by a transfer case 180 described later.

A hydraulic cylinder 161 as a tank actuator is connected to a lower portion of the grain tank 120. The pressure cylinder 161 is provided at a position arranged in the inward and outward direction in the transverse direction of the traveling machine body with respect to the threshing device 110, that is, at a position below the grain tank 120, when viewed from the direction of the lifting axis of the grain tank 120. To explain in more detail, the cylinder 161 is attached to a cylinder support portion provided in a portion of the grain tank 120 on the lower surface side of the discharge-side tank unit 120b, which is close to the elevating axis Y of the tank frame, and a cylinder support portion 162d provided in the column member 162a constituting the support structure 162. The pressure cylinder 161 is provided so that the side opposite to the side connected to the grain tank 120 enters the inside of the support structure 162.

That is, the grain tank 120 can be operated by the cylinder 161 to swing up and down about the lifting axis Y to the storage posture and the discharge posture.

As shown in fig. 20 and 21, leg members 123 extending downward from the grain tank 120 are provided at a plurality of locations in the front-rear direction of the travel machine body (the front-rear direction of the grain tank 120) on the free end side of the grain tank 120 (the side opposite to the side where the elevating axis Y is located, the extending end side of the extending tank portion 120 c). Each leg 123 protrudes downward from a box frame located on the lower surface side of the grain box 120. A plurality of box support portions 117b are provided on a threshing machine frame 117 of the threshing machine body 110a configured by being arranged at a threshing machine body 110a portion on the opposite side of the lifting shaft core Y with respect to the threshing cylinder shaft core 112a toward the front and rear of the traveling machine body (toward the front and rear of the threshing device). The box support portions 117b are disposed in a dispersed manner along the front-rear direction of the travel machine body, and each of them serves to receive the leg members 123 of the grain box 120.

Fig. 21(a) shows the grain box 120 in the storage posture. As shown in the figure, the grain tank 120 is operated by the cylinder 161 to descend and swing upward of the threshing device 110, and the grain tank is set in a storage posture in which the threshed grain from the threshing device 110 is stored.

As shown in fig. 20(b), when the grain tank 120 is in the storage posture, the lower ends of the plurality of leg members 123 of the grain tank 120 are placed on the tank support portion 117b of the thresher frame 117, and the free end of the grain tank 120 is supported by the thresher frame 117 via the leg members 123 and the top frame.

When the grain tank 120 is in the storage posture, the bottom wall 124a of the extended tank portion 120c of the grain tank 120 is horizontally or substantially horizontally located at a position higher than the top plate 116 of the threshing device 110, and the bottom wall 124b of the discharge-side tank portion 120b of the grain tank 120 is horizontally or substantially horizontally located at the lateral side of the threshing device 110 at a position lower than the bottom wall 124a of the extended tank portion 120 c.

Fig. 21(b) is a front view of the grain tank 120 in the discharge position. As shown in the figure, when the grain tank 120 is operated by the cylinder 161 and swings upward from the storage position to the transverse side (right side) of the traveling machine body opposite to the transverse side of the traveling machine body where the threshing device 110 is located, the grain tank is set to the discharge position so as to discharge the stored threshed grains.

That is, when the grain tank 120 is in the discharge posture, the discharge-side tank part 120b is in an inclined posture at the lower side. When the grain tank 120 is in the discharge posture, the bottom wall 124b of the discharge-side tank part 120b is in an inclined posture which is lower toward the grain discharge port and the bottom wall 124a of the protruding tank part 120c is in an inclined posture which is lower toward the discharge-side tank part, and as the degranulated grains remaining in the discharge-side tank part 120b are carried out, the degranulated grains remaining in the protruding tank part 120c move toward the discharge-side tank part 120b by natural falling due to the inclination of the bottom wall 124 c.

Fig. 28 is an explanatory diagram showing the arrangement of the grain box 120 with respect to the travel machine body. The triangle 165 shown in fig. 28 is a triangle having three corners, which are the contact points 101a of the pair of left and right front wheels 101, 101 and the rolling support points 107 provided on the rear wheel support frame 105. The position of the center of gravity G1 shown in fig. 28 represents the position of the center of gravity of the grain box 120 in the storage posture, and the position of the center of gravity G2 shown in fig. 28 represents the position of the center of gravity of the grain box 120 in the discharge posture. As shown in the figure, the grain box 120 is equipped such that the center of gravity G1 in the storage posture and the center of gravity G2 in the discharge posture are located inside the triangle 165.

As shown in fig. 21, the part of the threshing device 110 supporting the top plate 116 to be swingable for opening and closing is set to be close to the lifting axis Y, and the swinging direction of the grain tank 120 when viewed from the direction of the lifting axis Y when being lifted to the discharging posture is the same as or substantially the same as the swinging direction of the top plate 116 when viewed from the direction of the opening and closing axis X when being lifted to the opening posture. Therefore, the grain tank 120 raised to the discharge position does not hinder the raising of the top plate 116, and the opening of the threshing chamber 111 is enlarged to increase the raising angle of the top plate 116 from the closed position to the open position.

A bottom discharge screw 170 is provided in the bottom of the discharge side box portion 120b of the grain box 120, the conveyance start end portion of the grain carrying device 171 is communicated with the bottom of the front end side of the discharge side box portion 120b, the grain box 120 is switched to the discharge posture, and the grain can be removed from the grain box 120 by driving the bottom discharge screw 170 and the grain carrying device 171.

That is, as shown in fig. 21 and 26, the bottom discharge screw 170 is rotatably supported in a state in which the screw axis coincides with the lifting axis Y of the grain tank 120. To explain in more detail, the bottom discharge screw 170 is rotatably supported by the transfer case 180 and the support 160. The bottom discharge screw 170 is driven to rotate by a driving force from the engine 104a transmitted from the transmission 181, and discharges the threshed grains in the discharge-side tank unit 120b from the discharge port 120e provided in the bottom portion on the tip end side of the discharge-side tank unit 120b into the interior of the transfer box 180. The thresher grains remaining in the protruding box portion 120c move toward the discharge-side box portion 120b by the natural flow-down generated by the inclined posture of the bottom wall 124a of the protruding box portion 120c accompanying the progress of discharge of the thresher grains from the discharge-side box portion 120b by the bottom discharge screw 170, and are discharged from the discharge-side box portion 120b to the transfer box 180 by the bottom discharge screw 170.

As shown in fig. 20 and 26, the grain carrying-out device 171 includes a vertical carrying-out part 172 extending upward and downward of the travel machine body, the lower end of which communicates with the discharge port 120e of the discharge-side box part 120b via the transfer box 180, and a horizontal carrying-out part 173 extending from the upper end of the vertical carrying-out part 172. The vertical delivery section 172 includes a vertical screw 172 a. The vertical screw 172a is driven by power transmission from the bottom discharge screw 170 via a bevel gear mechanism. The lateral delivery unit 173 includes a lateral screw 173 a. The horizontal screw 173a is driven by power transmission from the vertical screw 172a via a bevel gear mechanism.

Therefore, the grain carrying-out device 171 is driven by the bottom discharge screw 170, receives and delivers the degranulated grain discharged from the grain tank 120 to the transfer tank 180 by the vertical carrying-out section 172, receives and delivers the degranulated grain from the vertical carrying-out section 172 by the horizontal carrying-out section 173, and discharges the degranulated grain from the discharge pipe 174 located at the end of the delivery.

As shown in fig. 26, the power transmission unit 181 for transmitting power to the grain carrying-out device 171 includes a transmission belt 183 for interlocking the output pulley 104b of the engine 104a with the relay input pulley 182, a relay gear case 186 for interlocking the input pulley 186a with the relay output pulley 184 supported integrally and rotatably with the relay input pulley 182 via the transmission belt 185, and a power transmission unit 189 for transmitting the output of the relay gear case 186 to the grain carrying-out device 171, and transmits the driving force of the engine 104a positioned below the power transmission unit 189 to the grain carrying-out device 171.

The transmission 189 is disposed at a rear side of a driving portion in front of the travel machine body of the grain carrying-out device 171. The transmission unit 189 includes an output pulley 186b provided on the relay case 186, an output device drive pulley 170b provided outside the relay case 180, and a transmission belt 187 wound around the output pulley 186b and the output device drive pulley 170 b. The carrying-out device drive pulley 170b is integrally rotatably attached to the screw shaft of the bottom discharge screw 170. The screw shaft of the bottom discharge screw 170 and the screw shaft of the longitudinal carry-out section 172 are interlocked by a gear linkage built in the relay box 180. The belt 187 is operated by a tension arm 188 which is swingably operated to switch between a tension state for transmission and a slack state in which transmission is stopped, and constitutes a belt tension clutch which drives and stops the bottom discharge screw 170 and the grain discharging device 171.

The vertical carrying-out part 172 constituting the grain carrying-out device 171 is provided at a rear side of a cab portion on a front side of the traveling machine body of the grain box 120 so as to perform work such as inspection from the working pedal 103 d. Further, the vertical carrying-out part 172 is disposed at the lateral outer side end of the traveling machine body so as to facilitate the work such as inspection from the lateral outer side of the traveling machine body.

The transport cylinder 172b constituting the vertical carrying-out section 172 is supported by the transfer box 180 so as to be rotatable about the screw axis of the vertical screw 172a, a rotation operation mechanism 191 including an electric rotation motor 190 as a carrying-out actuator is provided over the transport cylinder 172b and the transfer box 180, and the horizontal carrying-out section 173 can be operated by the rotation motor 190 to switch between the storage position and the carrying-out position.

As shown by the two-dot chain line in fig. 17 and 27(a) showing the carry-out position C of the horizontal carry-out section 173, when the rotary motor 190 is driven to the carry-out side and the transport cylinder 172b of the vertical carry-out section 172 is operated to rotate, the horizontal carry-out section 173 rotates with the screw axis of the vertical carry-out section 172 as the rotation axis Z1 and is located in the carry-out region as the carry-out position C. The horizontal carry-out portion 173 at the carry-out position C is extended from the vertical carry-out portion 172 to the outside in the horizontal direction of the traveling machine body, and discharges the threshing grains from the grain box 120 to a receiving side such as a cargo box of a transport vehicle parked on the horizontal side of the traveling machine body.

As shown in fig. 17 and 27(a) by the solid line showing the lateral transfer unit 173 at the storage position D, when the rotary motor 190 is driven to the storage side and the transport cylinder 172b of the vertical transfer unit 172 is operated to rotate, the lateral transfer unit 173 rotates around the rotation axis Z1 to be at the storage position D. The lateral carrying-out part 173 located at the storage position D is located inside the traveling machine body. To explain in more detail, as shown in fig. 27(a) and 27(b), the lateral carry-out portion 173 located at the storage position D enters the recessed portion 126 located at the lateral outer end of the traveling machine body on the upper end side of the grain box 120 in the storage posture. The concave portion 126 of the grain tank 120 is formed to be opened upward of the travel machine body and outward in the lateral direction of the travel machine body in a state where the grain tank 120 is in the storage posture, and the lateral carrying-out portion 173 can be taken out and put into the concave portion 126 by moving horizontally or substantially horizontally. More specifically, the storage position D is set to a position inside the traveling machine body with respect to a side wall 120D on the outside in the machine body lateral direction, which is the outside end of the traveling machine body in the traveling machine body lateral direction of the grain box 120, and substantially the same position as the side wall 120D with respect to the outside end 173t in the traveling machine body lateral direction of the lateral carry-out part 173 located at the storage position D, so that the lateral carry-out part 173 can be quickly carried out from the storage position D to the outside of the grain box 120. The depth of the recess 126 in the vertical direction and the lateral direction of the machine body and the storage position D of the lateral carry-out portion 173 are set so that the lateral carry-out portion 173 enters the recess 126 as a whole in the radial direction.

Fig. 22 is a perspective view showing the grain tank 120 in the discharge posture. As shown in fig. 21 and 22, a front concave portion 127 is provided at a lateral end portion of the front side wall 120a of the grain box 120 on the side where the grain carry-out device 171 is located. The front concave portion 127 is formed to be concave toward the body rear side and open toward the body lateral outside. The front recessed portion 127 allows the base end side of the lateral carrying-out portion 173 located at the carrying-out position C to enter when the grain tank 120 is set to the discharging posture, thereby preventing the grain tank 120 from coming into contact with the lateral carrying-out portion 173 and increasing the swing angle of the grain tank 120 from the storage posture to the discharging posture.

Fig. 23 is a perspective view showing the front concave portion 127 of the grain box 120. As shown in fig. 23, 21 and 22, the front recessed portion 127 of the grain box 120 is formed by disposing the right front wall portion 120R constituting the front side wall 120a on the body rear side of the left front wall portion 120L, and disposing the triangular middle-upper front wall portion 120X, the middle-lower left front wall portion 120Y and the middle-lower right front wall portion 120Z between the left front wall portion 120L and the right front wall portion 120R.

The right front wall portion 120R and the left front wall portion 120L are vertical walls in a vertical posture along the lateral direction of the machine body. The upper-middle front wall portion 120X is constituted by a vertical wall in an inclined posture and a vertical posture, which is inclined toward the rear of the machine body as the right end side is closer. The middle lower left front wall portion 120Y and the middle lower right front wall portion 120Z are disposed in a state where a connecting line L1 between the middle lower right front wall portion 120Z and the middle upper front wall portion 120X is a mountain folding line, a connecting line L2 between the middle lower right front wall portion 120Z and the right front wall portion 120R is a valley folding line, a connecting line L3 between the middle lower right front wall portion 120Z and the middle lower left front wall portion 120Y is a valley folding line, and a connecting line L4 between the middle lower left front wall portion 120Y and the left front wall portion 120L is inclined with a mountain folding line.

An operating system of the grain box 120 and the like will be explained.

Fig. 29 is a block diagram showing an operation system of the grain box 120 and the grain carry-out device 171. As shown in the figure, the discharge operation switch 194 and the reserve operation switch 195 are operated by a box lever 193 as box operation means, and the carry-out operation switch 197 and the storage operation switch 198 are operated by a carry-out lever 196 as carry-out operation means. In the control device 200 in which the discharge operation switch 194, the reserve operation switch 195, the carry-out operation switch 197, and the storage operation switch 198 are associated with each other, the pressure cylinder 161 for swinging the operation grain tank 120, the rotary motor 190 for rotating the operation traverse 173, the discharge drum motor 146 for switching the operation grain discharge drum 144c, and the spreader motor 145 for driving the spreader 144 are associated with each other. The control device 200 associates a storage posture detection switch 201, a discharge posture detection switch 202, a storage position detection switch 203, and a delivery position detection switch 204.

When the box lever 193 is operated and swings to the discharge position [ discharge ], the discharge operation switch 194 is operated by the box lever 193 to be turned on, and an operation command to switch the grain tank 120 to the discharge posture is output to the control device 200. When the box lever 193 is operated to swing to the storage position [ storage ], the storage operation switch 195 is turned on by the box lever 193, and an operation command to switch the grain box 120 to the storage posture is output to the control device 200. The remaining posture detection switch 201 detects switching of the grain box 120 to the remaining posture, and outputs detection information to the control device 200. The discharge position detection switch 202 detects switching of the grain tank 120 to the discharge position, and outputs detection information to the control device 200.

When the carry-out lever 196 is operated to swing to the carry-out position [ carry-out ], the carry-out operation switch 197 is operated by the carry-out lever 196 to be turned on, and an operation command to switch the lateral carry-out portion 173 to the carry-out position C is output to the control device 200. When the carry-out lever 196 is operated and swung to the storage position [ storage ], the storage operation switch 198 is operated by the carry-out lever 196 and turned on, and an operation command to switch the lateral carry-out portion 173 to the storage position D is output to the control device 200. The carry-out position detection switch 204 detects switching of the lateral carry-out unit 173 to the carry-out position C, and outputs detection information to the control device 200. The storage position detection switch 203 detects switching of the lateral transfer unit 173 to the storage position D, and outputs detection information to the control device 200.

The control device 200 is constituted by a microcomputer, and includes a box control unit 206, an automatic switching unit 207, a manual switching unit 208, a discharge cylinder control unit 209, and a spreader control unit 210.

The manual switching unit 208 operates the rotary motor 190 so as to switch the lateral carrying-out unit 173 to the storage position D and the carrying-out position C corresponding to the operation position of the carrying-out lever 196, based on the detection information from the carrying-out operation switch 197, the storage operation switch 198, the storage position detection switch 203, and the carrying-out position detection switch 204.

Therefore, by operating the carry-out lever 196 to swing to the storage position [ storage ], the manual switching unit 208 can control the rotation motor 190 to drive to the storage side, and operate the lateral carry-out portion 173 to the storage position D. By operating the carry-out lever 196 to swing to the carry-out position [ carry-out ], the manual switching unit 208 can control the rotary motor 190 to drive to the carry-out side, and operate the lateral carry-out portion 173 to the carry-out position C. While the carry-out operation switch 197 is operated in an on state by the operation of the carry-out lever 196 to the carry-out position [ carry-out ], the rotary motor 190 is driven and the lateral carry-out portion 173 moves in the carry-out region.

The bin control unit 206 controls the grain bin 120 to switch between the storage position and the discharge position corresponding to the operation position of the bin lever 193 based on the detection information from the storage operation switch 195, the discharge operation switch 194, the storage position detection switch 201, and the discharge position detection switch 202, the flow of the switching control of the grain bin 120 and the traverse transport unit 173 shown in fig. 30, the flow of the discharge position control of the grain bin 120 shown in fig. 31, and the flow of the storage position control of the grain bin 120 shown in fig. 32. After the automatic switching unit 207 switches the traverse transport unit 173, the box control unit 206 sets the grain box 120 to the storage posture and the discharge posture.

That is, when the box control unit 206 receives an operation command to switch the grain tank 120 to the discharge posture from the discharge operation switch 194 and determines that the grain tank 120 is in the storage posture based on the detection information from the storage posture detection switch 201, the traverse unit 173 is switched to the delivery position C by switching control by the automatic switching unit 207 described later, and then the control cylinder 161 is driven to the discharge side, and when the detection information that the grain tank 120 is switched to the discharge posture is received from the discharge posture detection switch 202, the control cylinder 161 is stopped.

When an operation command for switching the grain tank 120 to the storage posture is input from the storage operation switch 195 and the grain tank 120 is judged to be in the discharge posture based on the detection information from the discharge posture detection switch 202, the tank control unit 206 controls the cylinder 161 to be driven to the storage side, and when the detection information for switching the grain tank 120 to the storage posture is input from the storage posture detection switch 201, the cylinder 161 is controlled to be stopped.

The automatic switching unit 207 switches the operation of the traverse carrying-out unit 173 to the carrying-out position C in association with the swing operation of the grain tank 120 to the discharging posture.

That is, as shown in steps 1 to 6 in fig. 30, when the automatic switching unit 207 inputs an operation command to switch the grain tank 120 to the discharge posture from the discharge operation switch 194, and when it is determined that the lateral carrying-out unit 173 is located at the storage position D based on the detection information from the storage position detection switch 203, the rotation motor 190 is operated to drive the carrying-out side and automatically switch the lateral carrying-out unit 173 to the carrying-out position C when the grain tank 120 is in the storage posture before the posture switching of the grain tank 120 by the tank control unit 206 is performed.

The automatic switching unit 207 switches the operation of the traverse 173 to the storage position D in association with the swing operation of the grain box 120 to move the grain box 120 to the storage posture.

That is, as shown in steps 7 to 12 in fig. 30, when the automatic switching unit 207 receives an operation command for switching the grain tank 120 to the storage posture from the storage operation switch 195 and determines that the lateral carrying-out unit 173 is located at the carrying-out position C based on the detection information from the carrying-out position detection switch 204, the rotation motor 190 is operated to drive the grain tank 120 to the storage side and the lateral carrying-out unit 173 is automatically switched to the storage position D after the posture switching of the grain tank 120 by the tank control unit 206 is performed and the grain tank 120 is switched to the storage posture.

Therefore, when the box control lever 193 is manually operated to switch to the discharge position [ discharge ], if the traverse unit 173 is already located at the carry-out position C, the automatic switching mechanism 207 does not operate so that the traverse unit 173 does not become an obstacle to the swing-up of the grain tank 120, and the tank control unit 206 operates the cylinder 161 to drive the grain tank 120 to the discharge side, thereby switching the grain tank 120 to the discharge posture.

When the box lever 193 is manually operated to switch to the discharge position [ discharge ], if the lateral carrying-out unit 173 is already at the storage position D, the automatic switching unit 207 is operated to drive the rotary motor 190 to the carrying-out side and the lateral carrying-out unit 173 is switched to the carrying-out position C before the switching of the grain box 120 by the box control unit 206 is performed. When the traverse transport unit 173 is switched to the transport position C and does not become an obstacle to the swing of the grain tank 120, the tank control unit 206 operates the cylinder 161 to drive the grain tank 120 to the discharge side, and the grain tank 120 is switched to the discharge posture.

When the control box lever 193 is switched to the storage position [ storage ] by a manual operation, the box control unit 206 is operated, the pressure cylinder 161 is driven to the storage side, and the grain box 120 is switched to the storage posture. When the grain tank 120 is switched to the storage posture, the automatic switching unit 207 operates to operate the rotary motor 190 to drive the grain tank to the storage side, and the lateral carrying-out unit 173 is switched to the storage position D.

The discharge tank control unit 209 controls the discharge tank motor 146 to be driven and stopped based on the operation commands from the discharge operation switch 194 and the reserve operation switch 195, the detection information from the reserve posture detection switch 201 and the discharge posture detection switch 202, and the information from the tank control unit 206 that controls the driving of the pressure cylinder 161, and automatically switches the grain discharge tank 144c to the supply position a when the grain discharge tank 144c is switched to the tank swing position B and the grain tank 120 is in the reserve posture while the grain tank 120 is swinging and the grain tank 120 is in the discharge posture, and maintains the grain discharge tank 144c at the supply position a while the grain tank 120 is in the reserve posture.

The spreader control unit 210 controls the spreader motor 145 to be driven and stopped based on the detection information from the storage attitude detection switch 201 and the discharge attitude detection switch 202 and the information from the tank control unit 206 that controls the driving of the pressure cylinder 161, automatically stops the spreader 144 while the grain tank 120 is swinging and while the grain tank 120 is in the discharge attitude, automatically drives the spreader 144 when the grain tank 120 is in the storage attitude, and maintains the spreader 144 in a driven state while the grain tank 120 is in the storage attitude.

[ other modes for carrying out the invention in embodiment 2]

(1) In the above-described embodiment, the example in which the posture of swinging downward to above the threshing device 110 is set as the storage posture of the grain tank 120 has been described, but the posture of swinging downward from the discharge posture to the lateral side or the rear side of the threshing device 110 may be set.

(2) In the above embodiment, the grain tank 120 is disposed such that the elevating axis Y is oriented to the front and rear of the travel machine body, but the grain tank 120 may be configured such that the elevating axis Y is oriented to the lateral direction of the travel machine body and the grain tank swings in the front and rear direction of the travel machine body to switch between the storage posture and the discharge posture.

(3) In the above-described embodiment, the automatic switching unit 207 is constituted by the control device 200, but in order to automatically switch the carrying-out lever 196 to the carrying-out position [ carrying-out ] when the box lever 193 is operated to the carrying-out position [ carrying-out ], it may be performed by a means of associating the box lever 193 and the carrying-out lever 196 with each other by a link mechanism or an operation cable, or by a means of associating the grain box 120 with the carry-out portion 173 by a cam mechanism or the like in order to switch the swinging force of the grain box 120, in which the carry-out portion 173 is swung up, to the carrying-out position C.

In the above-described embodiment, the case lever 193 is used as the case operation means and the carry-out lever 196 is used as the carry-out operation means, but the case operation means may be implemented by using an operation switch or a touch panel directly operated by hand.

(5) In the above-described embodiment, the example in which the pressure cylinder 161 is used as the tank actuator has been described, but the present invention may be implemented by a mechanism in which a motor and a screw mechanism or a link mechanism are combined.

(6) In the above-described embodiment, the example in which the rotary motor 190 is used as the carrying-out actuator is shown, but it may be implemented using a cylinder.

(7) In the above embodiment, the travel machine body outer side end 173t of the lateral delivery portion 173 in the travel machine body lateral direction in the storage posture is located at a position inside the travel machine body from the side wall 120d as the travel machine body outer side end of the grain tank 120 and at the same position or substantially the same position as the side wall 120d as the travel machine body outer side end, but may be located at a position outside the travel machine body from the side wall 120d of the grain tank 120 and at substantially the same position as the side wall 120 d. The operation may be performed at the same position as the side wall 120d of the grain tank 120.

(8) In the above-described embodiment, the example in which the carry-out component 173 of the storage position D enters the recessed portion 126 over the entire radial direction is shown, but the carry-out component may be implemented such that only a part of the carry-out component 173 in the radial direction enters the recessed portion 126.

(9) The combine harvester according to the above-described embodiment may be used in a combine harvester in which instead of the harvesting unit 130 being configured to harvest the planted straw in a one-stage harvesting state in which the planted straw is cut off near the ground, the threshing device 110 is configured to integrally feed the harvested straw into the threshing chamber 111 from the trunk to the ear, the harvesting unit is configured to harvest the planted straw in a two-stage harvesting state in which the harvested straw is cut off at two positions, the position near the ground and the position between the ground and the ear, and the threshing device is configured to feed only the ear end side of the harvested straw that is harvested in the two-stage harvesting state into the threshing chamber.

[ embodiment 3]

Hereinafter, embodiment 3 will be described with reference to fig. 33 to 47.

Fig. 33 is a left side view showing the whole of the combine harvester. Fig. 34 is a right side view showing the whole of the combine harvester. Fig. 35 is a plan view showing the whole of the combine harvester. As shown in fig. 33, 34, and 35, the combine harvester includes a traveling machine body equipped with a pair of left and right front wheels 301 and a pair of left and right rear wheels 302 and 302, a threshing device 310 and a grain tank 320 provided at the rear part of a machine body frame 303 of the traveling machine body, and a harvesting unit 330 having a feeder 331 projecting from the front part of the threshing device 310 toward the front of the machine body, and performs harvesting work of rice, wheat, and the like by traveling the traveling machine body with the harvesting unit 330 in a lowered working state.

The traveling machine body will be explained.

The traveling machine body includes a primary drive portion 304 provided at a lateral end portion of the traveling machine body between front wheels 301 and rear wheels 302, and a traveling transmission case 305 supporting the pair of left and right front wheels 301, 301 to be drivable, and the traveling transmission case 305 receives a driving force from an engine 304a provided in the primary drive portion 304 to drive the pair of left and right front wheels 301, 301 to travel.

The traveling transmission 305 includes a hydrostatic continuously variable transmission, converts the driving force from the engine 304a into the driving force on the forward side and the reverse side, and transmits the driving force on the forward side and the reverse side to the front wheels 301 after continuously changing the speed. The engine 304a is disposed below a side box portion 321 on a grain box 320, which will be described later.

The traveling machine body includes a driving unit 306 disposed in front of the threshing device 310 and the grain tank 320 and provided in front of the machine body frame 303. The cab 306 is provided with a cab 306 a. When a power steering device (not shown) is operated by riding on the driver unit 306, a pair of left and right rear wheels 302, 302 are operated to swing and steer, thereby steering the traveling body.

The harvesting section 330 will be explained.

The harvesting unit 330 includes a feeder 331, and a harvesting frame 332 having a rear end connected to a front end of the feeder 331. A crop divider 333 is provided at the left and right front ends of the harvesting frame 332. The harvesting frame 332 includes a conveying platform 334 connected to the feeder 331, a pusher-type harvesting device 335 driveably provided at a front end portion of the conveying platform 334, a lateral conveying auger 336 driveably provided above the conveying platform 334, and a rotary drum 337 driveably and rotatably provided above the harvesting device 335. The rotary drum 337 is supported by a pair of left and right support arms 337a, 337a extending from the rear end of the harvesting frame 332 so as to be vertically swingable forward, and is adjusted to be raised and lowered by the swing adjustment of the support arms 337 a.

The feeder 331 is provided to protrude forward from a support portion provided at the front of the thresher body 311 through the lower side of the driver portion 306. The feeder 331 is supported at the front of the threshing device 310 so as to be vertically swingable, and is operated by the lifting cylinder 338 so as to swing, thereby operating the harvesting unit 330 to be lifted and lowered to an operation state in which the crop divider 333 and the harvesting device 335 are lowered to a position close to the ground and a non-operation state in which the crop divider 333 and the harvesting device 335 are raised to a position higher than the ground.

Accordingly, the harvesting part 330 harvests the planted straw by being operated in the descending operation state, traveling the traveling body, and supplies the harvested straw to the threshing device 310.

That is, the pair of left and right grain dividers 333 and 33 divide the planted grain stalks into harvested grain stalks to be harvested and non-harvested. The rotary drum 337 rakes the ear heads of the planted grain stalks of the harvest object above the transverse conveying screw conveyor 336, and the harvesting device 335 harvests the dried plants of the planted grain stalks. The horizontal conveying screw conveyor 336 is provided with screw conveying plates 336a on the left and right sides thereof so as to be rotatable integrally, and the horizontal conveying screw conveyor 336 conveys the whole of the harvested straw from the cutting portion of the harvesting device 335 to the ear tip laterally to the front portion of the feeder 331 via the screw conveying plates 336 a. The whole of the harvested straw reaching the front portion of the feeder 331 and dried to the ear is fed to the transport start end portion of the feeder 331 by a raking arm 336b integrally rotatably provided at the middle portion of the lateral transport screw 336, and is transported to the rear side by the feeder 331 and supplied to the threshing device 310.

The threshing apparatus 310 will be explained.

Fig. 37 is a longitudinal sectional side view showing the threshing device 310. As shown in fig. 37, the threshing device 310 includes a threshing chamber 312 provided at an inner upper portion of the threshing machine body 311 and a threshing portion 310A, the threshing portion 310A is provided in the threshing chamber 312 so as to be rotatable toward the threshing cylinder cores 313a in front of and behind the traveling machine body, and the threshing portion 310A performs threshing processing on the harvested straws from the feeder 331.

That is, a threshing cylinder driving gear mechanism 314 is coupled to a front end portion of a rotation support shaft 313b of the threshing cylinder 313, and the threshing cylinder 313 is driven to rotate around a threshing cylinder shaft core 313a by a driving force from the engine 304a transmitted to the threshing cylinder driving gear mechanism 314. A rake cylinder 315 having two rake helical blades 315a is integrally rotatably connected to the front end of the threshing cylinder 313. The raking cylinder 315 rakes and supplies the whole of the harvested straw from the cutting part of the harvesting device 335 to the ear head of the threshing machine body from the input port 311a located on the front wall of the threshing machine body 311 through the feeder 331 to the threshing chamber 312 through two raking helical blades 315 a. The threshing cylinder 313 includes a plurality of rod-shaped threshing teeth 313c arranged in the rotation direction and the circumferential direction, and the threshing teeth 313c convey the harvested straws supplied to the threshing chamber 312 toward the rear of the threshing chamber and perform threshing. The threshing cylinder 313 includes a plurality of threshing teeth support rods 313d arranged at intervals in the circumferential direction, and is constituted by a rod-shaped threshing cylinder. The threshing cylinder 313 can reduce the threshing load by allowing the bodies of the harvested straws to enter the threshing cylinder from between the threshing teeth support bars 313d, thereby efficiently performing threshing processing on a large number of harvested straws supplied to the threshing chamber 312.

The threshing device 310 includes a sorting unit 310B, and the sorting unit 310B includes a swing sorting device 316 provided under the threshing chamber 312 so as to be swingable, and the sorting unit 310B sorts the threshing processed material from the threshing unit 310A into grains and dust.

That is, the swing sorting device 316 receives the threshed processed material falling from the threshing chamber 312 through the receiving net 312 a. The swing sorting device 316 sorts the received threshing processed product into threshing grains and dust by an air flow formed by a sorting air supplied rearward by the main wind turbine 317 and the sub wind turbine 317a provided in front of the swing sorting device 316, drops the threshing grains from the swing sorting device 316, and supplies the dust together with the threshing discharge stalks discharged from the threshing chamber 312 to the stalk crushing device 318 connected to the rear wall of the thresher body 311. The straw-discharging grinder 318 grinds the threshing straw-discharging and dust from the threshing unit 310A and the sorting unit 310B by the rotary blade 318a, and discharges the crushed straw and dust from the dust-discharging port 318B to the rear side of the travel machine body.

The threshing device 310 includes a first screw conveyor 319a and a second screw conveyor 319b provided below the swing sorting device 316 and arranged in the front-rear direction of the threshing machine body. The first screw conveyor 319a conveys the processed pellets, which are the first processed objects, falling from the swing sorting device 316 in the transverse direction of the thresher body, and supplies the processed pellets to the winnowing device 340 located on the outer side in the transverse direction of the thresher body 311. The second screw conveyor 319b conveys the unprocessed pellets, which are the second processed material, dropped from the swing sorting device 316 in the transverse direction of the thresher body, and supplies the same to the reduction device 345 located on the outer side in the transverse direction of the thresher body 311. As shown in fig. 38, the reduction device 345 includes a reprocessing part 345a for refining and granulating the unprocessed grains from the second screw conveyor 319b by the rotating blades and the fixed blade, and a screw conveyor 345b for feeding the grains from the reprocessing part 345a to the upper part of the thresher 311, into the thresher from a reduction port (not shown) located on the lateral wall of the thresher 311, and into the starting end side of the swing classifier 316. A blower 317b is provided in front of the second screw conveyor 319b, and the separation air is supplied to the processed object falling from the second screw conveyor 319b by the blower 317 b.

A grain tank 320 is illustrated.

As shown in fig. 35, 36, and 39, the grain tank 320 is disposed above the threshing device 310.

Specifically, the grain tank 320 includes a side tank portion 321 located on the right lateral side of the traveling machine body with respect to the threshing device 310, and an upper tank portion 322 extending laterally from the side tank portion 321 to the left of the traveling machine body and located above the threshing device 310.

The side box portion 321 and the upper box portion 322 communicate with each other to form one storage space as the whole grain box 320. The side tank portion 321 is formed such that the bottom wall 321a is located at a lower position than the bottom wall 322a of the upper tank portion 322 and the upper end 310b of the top plate 310a of the threshing device 310. A grain inlet 323 for feeding the degranulated grain from the discharge tube 341 of the winnower 340 is provided on the upper part of the front wall of the grain tank 320. The grain inlet 323 is disposed at an end portion on the upper front wall of the upper box 322 opposite to the side box.

As shown in fig. 39 and 40, a discharge screw 350 is provided to be rotatable in a driving manner at a corner portion of the bottom 321b of the side box portion 321 opposite to the upper box portion side and at a portion where the grain discharge port 321c is provided, and a conveyance start end portion of the grain discharge screw 351 communicates with a conveyance end portion of the discharge screw 350. The conveyance end of the discharge screw 350 and the conveyance start of the grain discharge auger 351 are communicated with each other via a transfer box 352 provided in front of and outside the bottom 321b of the side box 321.

The grain carrying-out screw conveyor 351 includes a vertical screw conveyor 353 rising upward from the intermediate transfer box 352 and a horizontal screw conveyor 354 projecting horizontally or substantially horizontally from a conveyance end portion of the vertical screw conveyor 353 and having a discharge tube 354a at a projecting end portion. The grain carrying-out screw conveyor 351 is rotatably connected to the transfer box 352 by a screw axis of the vertical screw conveyor 353 as a rotation axis Z2. The grain carrying-out screw conveyor 351 is rotated by being operated by a rotation operation mechanism 390 (see fig. 40), and is switched between a use state in which it protrudes to the outside in the lateral direction of the traveling machine body toward the lateral screw conveyor 354 and a storage state in which it enters the traveling machine body side. As shown in fig. 35, 36, and 39, in the storage state of the grain carrying-out screw conveyor 351, the transverse screw conveyor 354 is in an attitude of entering the notch portion 320a provided at the upper end portion of the side box portion 321 and facing the front and rear of the travel machine body. The rotation operation mechanism 390 includes an electric motor 391, and operates the grain carrying-out auger 351 to rotate by the driving force of the electric motor 391.

As shown in fig. 40, the grain tank 320 is supported by a support structure 360 having a pair of front and rear pivot support portions 361 and 361 dispersed in the front and rear sides of the side tank portion 321 so as to be swingable and vertically movable about a vertical axis Y. The support structure 360 supports the grain tank 320 in a state where the elevating axis Y is oriented to the front and rear axes of the traveling machine body and the elevating axis Y is oriented to the same axis as the rotation axis of the discharge screw 350.

As shown in fig. 33, 36, and 40, the support structure 360 is disposed on the traveling machine body so as to be located laterally of the threshing device 310. The support structure 360 includes a plurality of strut members 362 erected on the body frame 303 of the traveling body, a beam member as a support member 363 connected to the strut members 362 and facing the front and rear of the traveling body, a beam member as a support member 364 connected to the support member 363 and facing the lateral direction of the traveling body, and a pair of front and rear pivot portions 361 and 361 projecting upward from the front and rear support members 364 toward the body. The support structure 360 has a frame structure in which the support member 362 and the support members 363 and 364 are combined as a frame body. The support member 364 for the traveling machine body lateral direction is coupled to the support member 363 over the machine body side wall of the threshing device 310. The pair of front and rear pivot portions 361 and 361 are supported by fulcrum portions provided on wall surfaces of a front side wall and a rear side wall on the front side of the grain box 320 so as to be rotatable about the lifting axis Y. The pivot 361 on the front side is formed by a transfer case 352.

The grain tank 320 is configured to be switched between an ascending posture and a descending posture by being operated by a drive mechanism provided below the side tank portion 321. The drive mechanism is constituted by a hydraulic cylinder 366. The cylinder 366 is connected to the tank frame and the cylinder bracket 362a provided on the column member 362 of the support structure 360.

Fig. 39 and 41(a) are front views showing the grain box 320 in the lowered position. As shown in the figure, when the grain tank 320 is operated by the pressure cylinder 366 to swing downward, the upper tank part 322 is lowered upward of the threshing device 310, and the leg members 324 extending downward from a plurality of positions in the front-rear direction at the lower part of the upper tank part 322 are brought into contact with and supported by the body frame of the threshing device 310 from above, the threshed grains from the first screw conveyor 319a of the threshing device 310 are collected and left in a lowered posture. When the grain tank 320 is in the lowered position, the upper tank 322 is in a state where the bottom wall 322a is positioned above the threshing device 310 in a horizontal or substantially horizontal position, and the side tank 321 is in a state where the bottom wall 321a is positioned on the side of the threshing device 310 in a horizontal or substantially horizontal position.

Fig. 41(b) is a front view showing the grain box 320 in the raised posture. As shown in the figure, when the grain tank 320 is operated by the cylinder 366 to swing upward and the upper tank 322 is separated upward from the threshing device 310, the grain tank is raised to discharge the remaining threshed grains.

When the grain tank 320 is in the raised position, the side tank 321 is inclined such that the bottom wall 321a is lower toward the discharge screw 350, and the threshed grains flow toward the discharge screw 350 by their own weight. When the grain tank 320 is in the raised position, the upper tank 322 is inclined such that the bottom wall 322a is lower toward the side tank, and the threshed grains flow toward the side tank 321 by their own weight.

As shown in fig. 38 and 39, the winnowing device 340 is provided with a blower device 342 having a discharge tube 341. When the grain tank 320 is switched between the ascending posture and the descending posture, the blower device 342 is operated by the electric motor 343 to rotate, and the discharge tube 341 is operated to retreat to the outside of the grain inlet 323 without being an obstacle to the swing of the grain tank 320.

As shown in fig. 40 and 44, a grain outlet 326 is provided in a side wall of a side box portion 321, which is a side wall 325, of the grain box 320 that faces downward and outward from the traveling machine body in the upward posture of the grain box 320. The grain outlet 326 is formed such that the upper end is located at a height higher than the upper end of the discharge screw 350.

The grain outlet 326 is opened and closed by a cover 370. The cover 370 is attached to the side wall 325 via a hinge 370 a. The opening and closing operation is performed by swinging the door around an opening and closing axis X toward the front and rear. The cover 370 is pivotally supported to swing outward of the grain tank 320 around an opening/closing axis X located at an upper end side to open, and the grain outlet 326 is naturally opened by the weight of the cover 370 and the pressure of the grains in the tank as the grain tank 320 swings upward.

As shown in fig. 39 and 45, a discharge pipe 371 is attached to the lateral end of the grain tank 320. The discharge tube 371 includes a discharge tube main body 371a and vertical plate parts 371b rising from the front and rear sides of the discharge tube main body 371a and connected to the front and rear side walls of the grain box 320 via pivot cores P. The discharge tube 371 swings up and down about the pivot axis P relative to the grain tank 320, and switches between a rising storage posture and a falling use posture.

As shown in fig. 45, when the front and rear vertical plate parts 371b enter the front or rear side of the grain box 320 as the discharge tube 371 is raised and swung around the pivot axis P, the discharge tube main body 371a is positioned outside the side wall 325 of the grain box 320 along the side wall 325, and is in a raised storage posture. As shown in fig. 42, 44 and 45, a flexion-extension link mechanism 372 is provided on the front and rear sides of the discharge tube 371 so as to extend over the vertical plate portion 371b of the discharge tube 371 and the grain box 320. As shown in fig. 42, the hook 373 is swingably supported by the front side of the grain tank 320 via the operating lever 374. When the discharge tube 371 is in the raised storage posture, the operation hook 373 swings about the support shaft, and is locked to the coupling shaft between the flexion-extension link mechanism 372 and the discharge tube 371 by engaging with the coupling shaft between the flexion-extension link mechanism 372 and the discharge tube 371, so that the discharge tube 371 is held in the raised storage posture by the hook 373. As shown in fig. 44(b), when the discharge tube 371 is held in the raised storage position, the lid 370 is held in the closed position against the grain pressure in the box by the pressing operation of the convex edge 371c protruding to the guide surface of the discharge tube main body 371a abutting against the outer surface side of the lid 370.

As shown in fig. 43 and 46, when the discharge tube 371 is lowered and swung around the pivot axis P and the front and rear vertical plate portions 371b are discharged to the lateral outside of the grain box 320, the grain flowing out from the grain discharge opening 326 is guided to the supply destination by the guide surface of the discharge tube main body 371 a. At this time, the vertical plate portion 371b receives the grain without overflowing from the discharge tube main body 371a to the front and rear sides. When the ejector tube 371 is lowered to the use position, the lock of the hook 373 to the bent state of the pantograph linkage 372 is released. The toggle link mechanism in which the locking of the hook 373 is released is switched to the extended state by the descending swing of the discharge tube 371, and when switched to the extended state, the hook is suspended and held in the descending use posture against the weight of grains flowing down on the discharge tube 371.

As shown in fig. 40 and 45, an interlocking mechanism 376 for interlocking the grain tank 320 and the discharge pipe 371 is constituted by one of the flexion-extension link mechanisms 372 and an operation cable 375 having an inner cable 375a connected at one end side to the tank-side link 372a constituting the flexion-extension link mechanism 372.

The linkage-mechanism-side end of the outer cable 375b constituting the operation cable 375 is held by an outer bracket 377 fixed to the grain box 320 by a connecting plate 377a, and the box-side end is held by the upper end of an outer bracket 378 fixed to the support structure 360.

The link mechanism side end of the inner cable 375a constituting the operation cable 375 is connected to the box side link 372a constituting the flexion-extension link 372, and the box side end is connected to the extension end of the inner bracket 379 extending downward from the lower portion of the grain box 320.

Therefore, as shown in fig. 46, when the grain box 320 is lifted and swung, the inner frame 379 is lifted and moved relative to the outer frame 378 by the lifting operation of the grain box 320, the link mechanism 376 slowly operates the inner cable 375a toward the flexion-extension link mechanism 372, and the flexion-extension link mechanism 372 is allowed to switch to the extended state by the load of the discharge pipe 371, so that the discharge pipe 371 is switched to the downward use posture in conjunction with the switching of the grain box 320 to the lifted posture.

As shown in fig. 45, when the grain box 320 is swung downward, the inner bracket 379 pulls the inner cable 375a toward the box side by the pull-down operation of the grain box 320, the inner cable 375a operates the flexible link mechanism 372 to switch to the bent state, and the link mechanism 376 switches the discharge pipe 371 to the raised storage posture in conjunction with the switching of the grain box 320 to the lowered posture.

When the hook 373 is hooked on the flexion-extension link mechanism 372, the flexion-extension link mechanism 372 is locked in the bent state, so that the ascending storage posture is maintained without switching the discharge pipe 371 to the descending use posture regardless of the operation of the inner cable 375a by the swinging of the grain box 320.

Therefore, the hook 373 is operated to be hooked to the flexion-extension link mechanism 372, and the discharge tube 371 is kept in the ascending storage posture in preference to the link mechanism 376. The hook 373 is disengaged from the bent link 372 by being operated, and the discharge pipe 371 is allowed to be switched between a storage posture in an upward direction and a use posture in a downward direction in conjunction with the swinging of the grain box 320.

Therefore, as shown in fig. 41(a), during the work, the pressure cylinder 366 is operated to switch the grain tank 320 to the lowering posture in advance. Thus, the threshed grain from the first screw conveyer 319a of the thresher 310 is supplied to the grain tank 320 by the winnower 340. When the hook 373 is hooked on the flexible link mechanism 372 in advance, the flexible link mechanism 372 is locked by the hook 373 in a bent state, the discharge pipe 371 is kept in an upward storage posture, the cover 370 is kept in a closed state against the pressure of grains in the box by the discharge pipe 371, the grain outlet 326 is closed, grains from the grain outlet 326 do not leak, and the threshed grains from the threshing device 310 can be collected in the side box portion 321 and the upper box portion 322 of the grain box 320 and stored.

As shown in fig. 41(b) and 47, to take out the threshed grain from the grain tank 320, the pressure cylinder 366 is operated to switch the grain tank 320 to the ascending posture in a state where the grain carrying-out screw conveyor 351 is in a use state and the horizontal screw conveyor 354 does not obstruct the ascending of the grain tank 320. When the hook 373 is hooked on the flexible link mechanism 372, the hook 373 holds the discharge pipe 371 in the ascending storage posture prior to the link mechanism 376, and the lid 370 is held in the state closed by the discharge pipe 371 regardless of the switching of the grain tank 320 to the ascending posture, the discharge screw 350 is driven and the grain removed from the side tank portion 321 is discharged to the transfer tank 352 when the carry-out clutch 380 (see fig. 40) is operated to switch to the on state. The grain carrying-out screw 351 is driven by a driving force transmitted from the discharge screw 350 via the transfer box 352, and the grain carrying-out screw 352 carries the threshed grains from the discharge screw 350. As the discharging screw 350 discharges the threshed grains in the side box portion 321, the threshed grains in the upper box portion 322 flow toward the side box portion 321 by their own weight and are discharged by the discharging screw 350, and the threshed grains stored in the side box portion 321 and the upper box portion 322 of the grain box 320 can be taken out by the discharging screw 350 and the grain carrying-out screw 351.

In contrast to this grain extraction, as shown in fig. 43 and 46, when the hook 373 is disengaged from the flexion-extension link mechanism 372 and the lock in the bent state by the hook 373 of the flexion-extension link mechanism 372 is released, when the grain tank 320 is switched to the raised position, the discharge pipe 371 is switched to the lowered use position by the link mechanism 376, the closing operation of the lid 370 is released, the lid 370 is switched to the opened state by its own weight and the pressing of the grains in the tank, the grain outlet 326 is opened, and the grains removed from the side tank portion 321 flow out from the grain outlet 326. As the grains in the side box portions 321 flow out, the grains in the upper box portion 322 flow toward the side box portions 321 by their own weight and flow out from the grain outlet 326. Therefore, the threshed grains stored in the side box portion 321 and the upper box portion 322 of the grain box 320 can be taken out by natural outflow without using the discharge screw 350 and the grain carrying-out screw 351. In the case of taking out the grains, the discharged grains flowing out from the grain outlet 326 can be guided by the discharge tube 371 in the lowered use posture to flow down to a supply destination such as a carriage box, thereby preventing the grains from flowing out to the outside of the supply destination.

371d shown in fig. 46 is a rubber sheet which forms the lateral and longitudinal walls for preventing grain overflow throughout the grain outflow opening 326 and the discharge tube 371. The rubber sheet is folded and stored between the discharge tube 371 in the raised storage posture and the lid body 370 in the closed state by receiving the folding operation of the discharge tube 371 when the discharge tube 371 is switched to the raised storage posture.

As shown in fig. 41(b), when cleaning or inspecting the threshing chamber 312 and the threshing cylinder 313 of the threshing device 310, the pressure cylinder 366 switches the grain tank 320 to the upward position, so that the upper side of the threshing device 310 can be opened, and the top plate 310a of the threshing device 310 can be operated to swing upward around the opening/closing shaft center P1 toward the front and rear of the machine body and to be opened.

The driving of the discharge screw 350 and the grain carrying-out auger 351 is performed by a driving structure shown in fig. 40. This drive structure transmits the drive force of the output shaft 304b of the engine 304a to the intermediate shaft 382 via the belt 381, transmits the drive force of the intermediate shaft 382 to the input shaft of the transmission case 384 via the belt 383, transmits the drive force of the output shaft of the transmission case 384 to the discharge screw 350 via the belt 385 and the intermediate case 352, and transmits the drive force of the discharge screw 350 to the screw shaft of the grain discharge screw 351. The carry-out clutch 380 is constituted by a belt 385.

[ other modes for carrying out the embodiment 3]

(1) In the above-described embodiment, the example in which only the front wheel 301 of the front wheels 301 and the rear wheels 302 is driven is shown, but the present invention may be implemented in a configuration in which only the rear wheel 302 of the front wheels 301 and the rear wheels 302 is driven, or a configuration in which the front wheels 301 and the rear wheels 302 are driven.

(2) In the above-described embodiment, the example in which the side box portion 321 is disposed on the side of the right side of the traveling machine body with respect to the threshing device 310 has been described, but it may be disposed on the side of the left side of the traveling machine body with respect to the threshing device 310, on the side of the rear side of the traveling machine body, or on the side of the front side of the traveling machine body.

(3) In the above embodiment, the example in which the discharge screw 350 is configured to discharge the grains to the front side of the grain tank 320 and the grain carrying-out screw conveyer 351 is configured to have the discharge cylinder 354a located to the rear side of the grain tank 320 in the storage posture has been described, but the discharge screw 350 may be configured to discharge the grains to the rear side of the grain tank 320 and the discharge cylinder 354a located to the front side of the grain tank 320 in the storage posture of the grain carrying-out screw conveyer 351.

(4) In the above-described embodiment, the hook 373 that holds the bent link mechanism 372 in a bent state is used as the lock unit that holds the discharge tube 371 in the ascending storage posture prior to the link mechanism 376, but various configurations such as a lock pin that is detachably attached to the fixed pin holder and the discharge tube 371, and the like, and various configurations having different specific functions may be used for the grain tank 320 and the like.

(5) In the above-described embodiment, the discharge tube 371 is used as the means for holding the lid 370 in the closed state, but the lid 370 may be held in the closed state by various locking means such as a dedicated lock pin.

(6) In the above-described embodiment, the example in which the traveling machine body is configured by the front wheels 301 itself is described, but the traveling machine body may be configured by the crawler traveling device itself.

(7) The combine harvester according to the above-described embodiment can also be used in a combine harvester in which instead of the harvesting unit 330 being configured to harvest the planted straw in a one-stage harvesting state in which the planted straw is cut off near the ground, the threshing device 310 is configured to put the harvested straw into the threshing chamber 312 from the plant stem to the head of the ear as a whole, and the harvesting unit is configured to harvest the planted straw in a two-stage harvesting state in which the planted straw is cut off at two positions, i.e., a position near the ground and a position between the ground and the head of the ear, and the threshing device configured to put only the head side of the harvested straw that is harvested in two stages into the threshing chamber is configured. The present invention can also be applied to a combine harvester using a self-threshing type threshing device.

The present invention can also be used in a combine harvester in which instead of the harvesting unit being configured to harvest the planted straw in a one-stage harvesting state in which the planted straw is cut off near the ground, the threshing device is configured to put the harvested straw into the threshing chamber as a whole from the trunk of the plant to the ear, and the harvesting unit is configured to harvest the planted straw in a two-stage harvesting state in which the planted straw is cut off at two positions near the ground and between the ground and the ear, thereby forming the threshing device in which only the ear end side of the harvested straw that has been harvested in the two stages is put into the threshing chamber.

Claims (9)

1. A combine harvester, a running machine body is provided with a threshing device for threshing the reaped straws from a reaping part and a grain box for storing the threshed grains from the threshing device, which is characterized in that,

comprises a discharge screw arranged in the bottom of the grain box and a grain conveying screw conveyor communicated with the discharge screw,

a driving mechanism for operating the swinging switching of the grain box around the axial core to the inclined state and the reserved state,

a grain outlet which can be opened and closed is arranged on the side wall of the grain tank which faces the outside of the traveling machine body and faces downwards in the inclined state of the grain tank,

a discharge pipe for guiding the falling of the degranulated grains from the grain outlet,

the discharge pipe is supported by the grain box and can freely swing to the using posture and the storing posture,

an interlocking mechanism is provided for interlocking the discharge pipe with the grain box, so that the discharge pipe is switched to the use posture in conjunction with the switching of the grain box to the inclined state, and the discharge pipe is switched to the storage posture in conjunction with the switching of the grain box to the storage state.

2. A combine harvester according to claim 1,

a lock unit is provided for holding the discharge tube in the storage posture prior to the link mechanism, and the lock unit is switchable between an activated state and a deactivated state.

3. A combine harvester according to claim 1 or 2,

the driving mechanism operates the grain box to swing and switch between the inclined state and the storage state around an axis along the extending direction of the discharging screw,

the axial core is positioned at the grain flow outlet side in the bottom of the grain box.

4. A combine harvester according to claim 1 or 2,

the axis of the grain box and the axis of the discharge screw are the same.

5. A combine harvester according to claim 1 or 2,

the grain box is arranged above the threshing device,

by switching the grain tank to the inclined state, the upper part of the threshing device can be opened, and the top plate of the threshing device can be opened.

6. A combine harvester according to claim 1 or 2,

the grain carrying-out screw conveyor includes a longitudinal screw conveyor rising upward from the intermediate transfer box and a transverse screw conveyor extending horizontally or substantially horizontally from a conveying end portion of the longitudinal screw conveyor and having a discharge tube at an extending end portion.

7. A combine harvester according to claim 6,

a driving force is transmitted from a side of the transfer box opposite to the side of the discharge screw to drive the discharge screw, the longitudinal screw conveyor, and the lateral screw conveyor.

8. A combine harvester according to claim 6,

the grain carrying-out screw conveyor is rotatably connected to the transfer box with a screw shaft of the longitudinal screw conveyor as a rotation shaft core,

the grain carrying-out screw conveyor is rotated by being operated by a rotation operation mechanism, and a use state in which the grain carrying-out screw conveyor protrudes to the lateral outside of the traveling machine body and a storage state in which the grain carrying-out screw conveyor enters the traveling machine body side are switched.

9. A combine harvester according to claim 8,

the transverse screw conveyor is positioned above the grain box in the reserved state.

Images