CN107396682B

CN107396682B - Harvesting machine

Info

Publication number: CN107396682B
Application number: CN201710406589.9A
Authority: CN
Inventors: 中岛伸六; 水本雅也; 山形浩司; 田中祐二; 冈田干夫; 吉田有作; 福冈义刚; 熊取刚; 三井孝文; 松下博昭; 内孝广; 寺坂贤一; 舘野裕介
Original assignee: Kubota Corp
Current assignee: Kubota Corp
Priority date: 2012-02-01
Filing date: 2013-01-30
Publication date: 2021-07-13
Anticipated expiration: 2033-01-30
Also published as: CN104066315B; CN107027418B; CN107396683B; CN104066315A; WO2013115247A1; CN107396683A; CN107409638B; CN113748851A; CN107027418A; CN107396682A; CN107409638A

Abstract

Provided is a harvesting machine which has sufficient supporting strength and can simplify the structure of a vehicle body frame. The harvesting machine is provided with a riding driving part, a harvesting conveying part for harvesting crops and conveying the crops backwards, and a driving engine on a travelling vehicle body provided with a left-right pair of front wheels (1) and a left-right pair of rear wheels (2), wherein a vehicle body frame (F) of the travelling vehicle body is provided with a left-right pair of front-back direction frame bodies (17R, 17L), and the left-right pair of front-back direction frame bodies (17R, 17L) are positioned on the left side and the right side of the travelling vehicle body and are arranged in a state of extending in the front-back direction of the travelling vehicle body.

Description

Harvesting machine

The application is a divisional application of an invention patent application with the application date of 2013, 1 month and 30 days, the application number of 201380007702.6 and the name of a harvesting machine.

Technical Field

The invention relates to a harvesting machine such as a combine harvester or a corn harvester.

Background

[1] As an example of a conventional harvesting machine, there is a harvester having the following structure: in a 4-wheeled traveling vehicle having a cutting and conveying section for cutting and conveying a crop rearward on a traveling vehicle body, and a pair of left and right front wheels and a pair of left and right rear wheels, a vehicle body frame provided on the traveling vehicle body includes a table having a substantially rectangular shape in plan view, on which main components constituting the vehicle body, such as a riding section covered with a cabin and a prime mover section including a driving engine, are mounted and supported by the front wheels on the left and right sides and the rear wheels on the left and right sides via a plurality of vertical frame sections integrally extending downward (see, for example, patent document 1). Although not shown in patent document 1, when the harvester is applied to a combine harvester, a device for supporting a heavy weight such as a threshing device and a grain box is placed on a stand.

[2] As a wheel-propelled combine harvester including a wheel-propelling device including a pair of left and right non-steered wheels and a pair of left and right steered wheels, and a threshing device, the following configurations are known.

A wheel-propelled combine harvester in which a threshing device having a threshing cylinder with a rotation axis along the left-right direction of a vehicle body is arranged near the upper side of front wheels at a position near the front part of the vehicle body, and a motor is arranged at the rear part of the vehicle body (see patent document 2).

[3] As a combine harvester including a traveling device including a pair of left and right front traveling units and a pair of left and right rear traveling units, and a threshing device, the following configurations are known.

A combine harvester has a threshing device having a length of a rotation axis of a threshing drum along a left-right direction of a machine body, and a motor as a power source disposed in a rear part of the machine body, the threshing device being disposed near a front part of the machine body above front wheels (see patent document 2).

[4] As a combine having an outer cover provided at an outer portion of left and right lateral walls forming a threshing chamber of a threshing device, the following configurations are known.

A combine harvester is configured such that an open/close door is formed by fixing a cover made of a metal plate to the outside of a lateral wall made of a metal plate forming a stripping chamber of a threshing device, and the open/close door is configured to be swingable open and close around the vertical axis of the rear part, thereby enabling maintenance and inspection of a receiving net and the like inside the stripping chamber (see patent document 3).

[5] As a combine harvester including a traveling device including a pair of left and right front traveling units and a pair of left and right rear traveling units, and a threshing device, the following configurations are known.

A combine harvester has a motor as a power source disposed at the rear of a machine body, a transmission for transmitting a variable speed power to front wheels as a front traveling part disposed at a left and right center part of a front part of the machine body, and a threshing device having a length along a left and right direction of a machine body of a rotation axis of a stroking roller disposed near an upper part of the front wheels at a position near the front part of the machine body (see patent document 2).

Patent document 1: japanese patent laid-open publication No. 61-215110 (JP 61-215110A)

Patent document 2: JP 9-107773A (JP 9-107773A) (paragraphs [ 0006 ], [ 0007 ], [ 0008 ], FIG. 1 and FIG. 2)

Patent document 3: japanese patent laid-open No. 2010-252724 (JP 2010-252724A) (paragraphs [ 0029 ], [ 0031 ], [ 0008 ], FIGS. 5 and 6).

Disclosure of Invention

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

In the above-described conventional structure, the vehicle body frame is composed of a machine base on which main components of the vehicle body having a large weight are mounted and a plurality of vertical frame portions integrally extended downward from the machine base, and therefore a large load supported by the machine base portion is supported by the plurality of vertical frame portions.

However, since the harvesting machine travels on a work site having many irregularities, a force in the vehicle body longitudinal direction or the vehicle body lateral width direction may act on the plurality of vertical frames from the machine base side supporting a large load, and if such a force acts, there is a disadvantage that the rigidity of the vehicle body frame tends to be low, such as the possibility of damage to the connecting portion between the vertical frame and the machine base portion is large. Further, in order to increase the rigidity, the number of vertical frames is increased, and a special structure is required to be added in order to increase the strength of the connecting portion between the vertical frame and the machine base portion, which is disadvantageous in that the structure of the entire vehicle body becomes complicated.

The invention aims to provide a harvesting machine which has sufficient supporting strength and can simplify the structure of a vehicle body frame.

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

The combine harvester having the structure described in patent document 2 is useful in that it can exhibit good traveling performance because it includes the wheel traveling device, but the center of gravity of the organism tends to be high because the threshing device is disposed above the front wheel in a state of being overlapped.

Further, since the motor as a power source is disposed at the rear portion of the vehicle body, the distance from the motor to the input portion of the harvesting device or the threshing device and the input portion of the traveling device becomes long, which is a drawback that the transmission structure is likely to be large and complicated.

The invention provides a wheel-propelled combine harvester, which is provided with a wheel-propelled device, wherein the center of gravity of a machine body is lowered as much as possible, so that stable travel is easy to be carried out, and the miniaturization and simplification of a power transmission structure are easy to realize.

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

The combine harvester having the structure described in patent document 2 includes a traveling device including a pair of left and right front traveling units and a pair of left and right rear traveling units, and is therefore useful in that it can exhibit good traveling performance.

However, in the above-described structure, the motor as the power source is disposed at a relatively high position in the rear portion of the machine body, and the threshing device is also disposed at a relatively high position above the front wheels, so that the center of gravity of the machine body tends to be relatively high.

The invention aims to realize low gravity center and left-right balance stabilization of a machine body in a combine harvester with a traveling device composed of a pair of left and right front traveling parts and a pair of left and right rear traveling parts.

[4] The problems associated with the background art [4] are as follows.

In the structure described in patent document 3, the cover made of a metal plate is fixed and integrated to the outside of the lateral wall made of a metal plate forming the stripping chamber, and thus the structure is useful in swiftly swinging opening and closing the stripping chamber, improving the rigidity of the lateral wall, and the like.

However, in the above structure, in order to fixedly attach the sheet metal cover to the lateral wall and to integrally swing the sheet metal cover, the lateral wall itself of the stripping chamber is configured to be swingable about the vertical shaft, and the sheet metal cover is supported by the lateral wall. Therefore, there is room for improvement in that a sealing structure for reliably sealing the lateral wall constituting the stripping chamber while enabling a swing motion is complicated, in that the shapes and sizes of the lateral wall and the cover are difficult to be largely different from each other, and in that it is difficult to use a space between the lateral wall and the cover for some applications.

The invention aims to provide a combine harvester which uses an external cover which can be opened and closed and is arranged on the lateral side wall, and can realize the simplification of the structure and the simplification of maintenance operation.

[5] The problems associated with the background art [5] are as follows.

The combine harvester having the structure described in patent document 2 includes a traveling device including a pair of left and right front wheels and a pair of left and right rear wheels, and is therefore useful in that it can exhibit good traveling performance.

However, in the above-described structure, the motor as the power source is disposed at a relatively high position in the rear portion of the machine body, which is far away from the threshing device and the transmission, and the power is transmitted from the motor to the threshing device and the transmission in the front of the machine body, and therefore, there are disadvantages that the power transmission path becomes relatively long, the center of gravity of the machine body becomes relatively high, and the like.

The invention aims to realize the compactness of a transmission structure and the low gravity center of a machine body in a combine harvester provided with a traveling device consisting of a pair of left and right front traveling parts and a pair of left and right rear traveling parts.

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

The harvesting machine according to the present invention is characterized in that a traveling vehicle body including a pair of left and right front wheels and a pair of left and right rear wheels is provided with a riding driving part, a harvesting and conveying part for harvesting and conveying crops rearward, and a driving engine, and a vehicle body frame of the traveling vehicle body includes a pair of left and right front-rear direction frame bodies which are located on both left and right sides of the traveling vehicle body and are provided so as to extend in a front-rear direction of the traveling vehicle body.

According to this configuration, since the pair of right and left front-rear facing frame bodies of the vehicle body frame are disposed on the right and left sides of the traveling vehicle body and extend in the front-rear direction of the traveling vehicle body, the left front wheel and the left rear wheel can be supported in a state close to the left front-rear facing frame body, and the right front wheel and the right rear wheel can be supported in a state close to the right front-rear facing frame body. Further, in a state where the riding operator, the engine, and the like are mounted on the pair of right and left front and rear facing frames, they can be supported compactly in the vertical direction.

As a result, the pair of front-rear direction frame bodies can be used as main structural bodies of the vehicle body frame to support the traveling vehicle body in a vertically compact shape, and it is not necessary to provide a vertically long longitudinal member in a state where a large load is supported on the lower side, and the vehicle body frame as a whole has a simple structure.

Further, the pair of front-rear direction frame bodies can be supported at a low position close to the front wheels and the rear wheels, and the pair of front-rear direction frame bodies provided at a low position close to the front wheels and the rear wheels can support the weight of the entire vehicle body in a state of having sufficient support strength.

Therefore, the purpose of providing a harvesting machine which has sufficient supporting strength and can simplify the structure of the vehicle body frame is achieved.

In a preferred embodiment, the vehicle body frame is configured to include an extension frame portion that extends outward in the vehicle transverse width direction from the pair of front and rear direction frame bodies, at a position between the front wheels and the rear wheels in the vehicle body front-rear direction.

According to this configuration, since the projecting frame portion projecting outward in the lateral width direction of the vehicle body from the portion located between the front wheel and the rear wheel in the front-rear direction of the vehicle body is provided, it is possible to effectively utilize the space between the front wheel and the rear wheel and support various devices mounted on the traveling vehicle body in a state of being supported by the projecting frame portion.

In a preferred embodiment, the engine is provided in a state of being supported by the extension frame portion.

According to this configuration, since the engine is supported by the extension frame, the engine required for driving the machine body can be provided by effectively utilizing the space between the front wheels and the rear wheels.

In a preferred embodiment, the engine is supported by a front portion of the extension frame portion.

According to this configuration, since the engine is supported by the front portion of the outrigger frame, for example, other devices and a space for work can be supported by the rear portion of the outrigger frame, and the space between the front wheels and the rear wheels can be more effectively used.

In a preferred embodiment, the engine is supported by the front-rear direction frame body.

According to this configuration, since the engine is supported by the front-rear direction frame body, the engine, which is a heavy device, can be supported by the front-rear direction frame body, which is a main frame body, so that the engine can be supported more firmly than in the case of supporting only the outrigger frame body, for example.

In a preferred embodiment, the pair of left and right front-rear direction frame bodies are configured to extend over the entire length of the running vehicle body.

According to this configuration, the entire vehicle body can be firmly supported with sufficient support strength by the left and right front-rear direction frame bodies extending over the entire length of the traveling vehicle body.

In a preferred embodiment, the vehicle body frame includes a projecting frame portion located between the front wheel and the rear wheel in the vehicle body front-rear direction, the projecting frame portion projecting outward in the vehicle body transverse width direction from the pair of front-rear direction frame bodies; the front wheels and the rear wheels are disposed in recessed portions formed at positions corresponding to four corners of the traveling vehicle body in a plan view by the pair of front-rear direction frame bodies and the projecting frame portion of the vehicle body frame.

According to this configuration, the pair of front-rear frame bodies and the projecting frame portion are provided in a state where recessed portions are formed at positions corresponding to four corners of the traveling vehicle body in a plan view, and the front wheels and the rear wheels are equipped with the recessed portions formed at the four corners.

With this configuration, the vehicle body frame can be made as large as possible to increase the support strength, and the front-rear length and lateral width of the traveling vehicle body can be made as compact as possible.

In a preferred embodiment, the pair of front-rear facing frames are provided in a state of being positioned on an inner side in the vehicle transverse width direction than the pair of front wheels and the pair of rear wheels; the distance between the pair of front-rear frame bodies and the front wheel and the rear wheel in the lateral width direction of the vehicle body is greater than the distance between the pair of front-rear frame bodies and the front wheel and the rear wheel in the lateral width direction of the vehicle body.

According to this configuration, since the distance in the vehicle transverse width direction between the front-rear direction frame body and the front and rear wheels is small and the distance from the center in the vehicle transverse width direction to the front-rear direction frame body in the vehicle transverse width direction is large, the distance between the front-rear direction frame bodies on both the left and right sides is large in a state where the front-rear direction frame body is close to the left and right front wheels and rear wheels.

Therefore, the traveling vehicle body can be supported in a stable state by the pair of left and right front-rear direction frame bodies disposed at a large distance in the lateral width direction of the vehicle body, and the left and right front wheels and the left and right rear wheels provided in a state of being close to the pair of left and right front-rear direction frame bodies.

In a preferred embodiment, the apparatus further includes a front-rear auxiliary frame body positioned between the pair of front-rear frame bodies and fixed to the pair of front-rear frame bodies.

According to this configuration, even when the pair of front-rear oriented frames are widely spaced apart from each other in the lateral width direction and a heavy device is mounted in a state of being biased to either the left or right, the device can be stably supported by the auxiliary frame provided between the pair of front-rear oriented frames and the biased one of the front-rear oriented frames.

In a preferred embodiment, the threshing section is provided in a state of being supported by the vehicle body frame, and the threshing section performs a threshing process of the crop harvested by the harvesting and conveying section.

According to this configuration, the threshing process of the crop cut by the cutting and conveying section is performed by the threshing section. Since the crop cut by the cutting and conveying section is conveyed toward the rear of the vehicle body, the trough-removing section is located on the rear side of the cutting and conveying section. The threshing portion is provided with a large-weight device such as a threshing cylinder for performing a threshing process on a crop inside, and is stably supported by the vehicle body frame.

In a preferred embodiment, the trough portion is supported by the front-rear direction frame body.

According to this configuration, the valley portion can be stably supported by the front-rear direction frame body of the main frame structure as the vehicle body frame.

In a preferred embodiment, the engine is supported by one of the pair of front-rear facing frames, and the trough is supported by the other of the pair of front-rear facing frames.

According to this configuration, the engine is supported by one of the front-rear direction frame bodies, and the valley portion is supported by the other of the front-rear direction frame bodies. That is, since the engine and the trough portion are supported by being allocated to the front-rear direction frame body on both the left and right sides, it is possible to stably support the engine and the trough portion in a state where the load is equalized to the left and right as much as possible, as compared to a structure in which, for example, both the engine and the trough portion are disposed biased in either one of the lateral direction of the traveling vehicle body and supported by the front-rear direction frame body on one of the front-rear direction frame bodies.

In a preferred embodiment, a grain tank is provided above the threshing section, and the grain tank stores grains obtained by the threshing in the threshing section.

According to this configuration, the grains obtained by the threshing in the threshing section are stored in the grain tank. Further, since the grain tank is installed so as to be positioned above the threshing section, the space above the threshing section can be effectively utilized, and the grain tank can be disposed without increasing the overall shape of the vehicle body.

That is, for example, when grain tanks are arranged so as to be positioned laterally or rearward of the threshing section, there is a disadvantage that the vehicle body width or the vehicle body longitudinal length becomes large, and the traveling vehicle body becomes large.

In a preferred embodiment, a box supporting frame body for supporting the grain box is provided in a state of being fixedly extended from the vehicle body frame.

According to this configuration, the grain tank is supported by the tank supporting frame body fixedly extended from the vehicle body frame, so that the grain tank can be stably supported by the vehicle body frame via the tank supporting frame body.

In a preferred embodiment, the trough-removing portion is supported by the auxiliary frame body.

According to this configuration, the trough-removing portion is supported by the auxiliary frame, i.e., the front-rear auxiliary frame positioned between and fixed to the pair of front-rear facing frames.

That is, even when the trough portion is provided in a state biased to one side in the vehicle transverse direction, the trough portion can be stably supported by the front-rear direction frame body and the auxiliary frame body positioned on one side in the vehicle transverse direction of the pair of front-rear direction frame bodies.

In a preferred embodiment, the vehicle body frame includes a projecting frame portion located between the front wheel and the rear wheel in the vehicle body front-rear direction, the projecting frame portion projecting outward in the vehicle body transverse width direction from the pair of front-rear direction frame bodies; the trough-like portion is provided such that a front end of the trough-like portion is positioned forward of a front end of the projecting frame portion in a side view.

According to this configuration, the front end of the threshing portion is positioned forward of the front end of the outrigger frame portion when viewed from the side, and therefore the load of the threshing portion is supported by the outrigger frame portion. That is, by supporting the load of the trough from the projecting lateral frame body, even when the trough is disposed in a state biased toward one side in the vehicle transverse direction, the trough is supported by the projecting frame body at a portion projecting outward from the frame body in front and rear of the portion located on one side in the vehicle transverse direction, and the trough can be supported in a stable state.

In a preferred embodiment, the vehicle body frame includes a front lateral frame body that connects vehicle body front end portions of the pair of front and rear lateral frame bodies, and a rear lateral frame body that connects vehicle body rear end portions of the pair of left and right front and rear lateral frame bodies.

According to this configuration, the vehicle body front end portions of the pair of right and left front-rear oriented frames are coupled to each other by the front-side lateral frame body, and the vehicle body rear end portions are coupled to each other by the rear-side lateral frame body. In this way, the pair of right and left front and rear facing frames, the front side transverse frame, and the rear side transverse frame integrally connect the frame assembly to form a strong frame assembly structure in a substantially rectangular frame shape in plan view.

In this way, by forming a strong frame assembly structure having a substantially square frame shape in plan view, it is possible to improve the support strength of the vehicle body frame, and to form the frame assembly structure by using both the front-side lateral frame body and the rear-side lateral frame body as support members for supporting, for example, front wheels or rear wheels.

In a preferred embodiment, a rear axle box supporting the pair of left and right rear wheels is supported to be swingable about a vehicle body front-rear axle center with respect to the rear side lateral frame body.

According to this configuration, even when the traveling vehicle body is inclined leftward and rightward following the unevenness due to the presence of the unevenness on the traveling road surface, the rear axle boxes supporting the pair of left and right rear wheels swing around the vehicle body front and rear axle cores with respect to the rear side lateral direction frame body, so that the pair of left and right rear wheels can follow the unevenness on the ground surface and the leftward and rightward inclination of the traveling vehicle body can be reduced as much as possible.

In a preferred embodiment, the pair of front-rear direction frame bodies includes a main body portion located at substantially the same height as the rear axle boxes, and a wheel support portion extending rearward and upward from the main body portion so as to be located above the rear axle boxes.

According to this configuration, since the body portions of the pair of front-rear direction frame bodies are provided at the low positions at substantially the same height as the rear axle boxes, the traveling vehicle body can be supported with the center of gravity of the entire vehicle body as low as possible.

The wheel support portion that supports the rear axle box is provided at a high position in a state of extending rearward and upward from the main body so as to be positioned above the rear axle box. By providing the wheel support portions at the high positions in this way, the wheel support portions on the left and right sides can be connected to the frame body via the rear-side lateral portions so as not to interfere with the rear axle boxes, and the rear axle boxes can be supported by the rear-side lateral portions to the lower portion of the frame body so as to be swingable around the vehicle body longitudinal axes.

Therefore, the rear axle box can be supported by the rear-side lateral frame body so as to be swingable around the vehicle body longitudinal axis, and the traveling vehicle body can be supported in a state where the center of gravity of the entire vehicle body is lowered as low as possible.

In a preferred embodiment, the cutting and conveying part is provided at the front part of the vehicle body; the pair of left and right front wheels is configured to be incapable of steering and the pair of left and right rear wheels is configured to be capable of steering.

According to this configuration, since the cutting and conveying unit is provided at the front portion of the vehicle body, the front wheels cannot be steered and the rear wheels can be steered, steering can be performed with the front portion of the traveling vehicle body as a turning center. That is, the direction of the traveling vehicle body can be changed without largely changing the position of the cutting and conveying unit.

As a result, when the cutting work is performed in the field, a small turn can be performed in the field, and for example, when the work in 1 work stroke is completed and the work is performed to turn the work stroke next time, the work stroke is easily performed to turn the work stroke next time.

In a preferred embodiment, the cutting and conveying part is provided to be freely movable up and down and swingable around a lateral fulcrum; a base end portion of a lifting actuator is supported by a vehicle body front portion side portion of the vehicle body frame, and the lifting actuator drives the cutting and conveying portion to lift and lower.

According to this configuration, the cutting and conveying section is provided so as to be swingable up and down about the lateral fulcrum, the base end portion of the up-and-down actuator is supported by the vehicle body front portion side portion of the vehicle body frame, and the tip end portion is connected to the cutting and conveying section. Then, the cutting and conveying part is driven to move up and down around the lateral fulcrum by actuating the actuator for moving up and down.

In this way, since the base end portion of the elevation actuator is supported by the vehicle body front portion side portion of the vehicle body frame, the elevation actuator can satisfactorily perform the elevation operation of the cutting and conveying portion while supporting the load of the cutting and conveying portion on the vehicle body front portion side portion of the vehicle body frame.

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

The wheel-propelled combine harvester of the present invention is characterized by comprising a wheel-propelled device composed of a pair of left and right non-steering wheels and a pair of left and right steering wheels, and an engine disposed on the right side or the left lateral side of the threshing device.

According to this configuration, the wheel-propelled combine is provided with the wheel-propelling device including the pair of left and right non-steering wheels and the pair of left and right steering wheels, and can obtain a wheel-propelled combine having excellent propelling performance. Further, by disposing the engine on the right or left lateral side of the threshing device, the engine can be disposed at a position relatively close to any of the vicinity of the swing fulcrum with respect to the harvesting device, the vicinity of the front end portion of the threshing device, and the vicinity of the drive shaft of the traveling device.

According to a preferred embodiment, the engine is disposed between the axle of the non-steered wheel and the axle of the steered wheel in a side view.

According to the above configuration, since the weight of the engine acts between the axle of the non-steered wheel and the axle of the steered wheel, it is advantageous in that the front-rear balance of the machine body is less likely to be disturbed, compared to a structure in which the weight of the engine acts on the outer side of the machine body than the front and rear axles in the front-rear direction of the machine body.

According to a preferred embodiment, the threshing device is disposed between the axle of the non-steered wheel and the axle of the steered wheel in a side view.

According to the above configuration, since the weight of the threshing device acts between the axle of the non-steered wheel and the axle of the steered wheel, it is advantageous in that the front-rear balance of the machine body is less likely to be disturbed, compared to a structure in which the weight of the threshing device acts on the outside of the machine body than the front and rear axles in the front-rear direction of the machine body.

According to a preferred embodiment, the engine is disposed on the non-steering wheel side with respect to an intermediate position between the axle of the non-steering wheel and the axle of the steering wheel in a side view.

According to the above configuration, since the engine is disposed on the non-steering wheel side with respect to the intermediate position between the axle of the non-steering wheel and the axle of the steering wheel, a space that can be effectively used as a space for maintenance or a space for disposing other objects can be formed at a lateral position on the right or left side of the threshing device or at a position on the non-steering wheel side with respect to the engine, and there is an advantage that the space on the vehicle body frame can be easily and effectively used.

Further, since the engine is disposed not on the steering wheel side but on the non-steering wheel side on which the direction change operation is not performed, the engine can be disposed sufficiently close to the non-steering wheel, and the engine-related equipment and the like can be disposed in a state close to the non-steering wheel, which has an advantage that the efficiency of utilizing the space on the vehicle body frame can be further improved.

According to a preferred embodiment, the threshing device is disposed on a center side in a lateral direction of the vehicle body with respect to the engine.

According to the above configuration, by disposing the heavy threshing device on the center side of the engine in the lateral direction of the vehicle body, there is an advantage that the left-right balance of the machine body can be stably maintained even if the engine is disposed on the lateral side of the threshing device.

According to a preferred embodiment, the engine is disposed at a position overlapping the non-steered wheel when viewed in a front-rear direction.

According to the above configuration, by disposing the engine at a position overlapping the non-steered wheels as viewed in the front-rear direction, there is an advantage that the non-steered wheels can be used as a protection mechanism for the engine, and the space on the vehicle body frame can be effectively used by easily positioning the engine as far outward as possible in the lateral direction of the machine body.

According to a preferred embodiment, the engine is disposed so as to be located at a position lower than an upper end of the outer peripheral edge of the non-steered wheel.

According to the above configuration, the height position of the engine is lowered without being affected by the size of the outer diameter of the non-steered wheel, and the center of gravity of the body is easily lowered to perform stable travel.

According to a preferred embodiment, the lower surface of the engine is disposed at substantially the same height as the axle of the non-steered wheel.

According to the above configuration, the lower surface of the engine is disposed at substantially the same height as the axle of the non-steered wheel, and the center of gravity of the engine is lowered, thereby facilitating stable travel.

According to a preferred embodiment, the lower surface of the threshing device is disposed at substantially the same height as the axle of the non-steered wheel.

According to the above configuration, the lower surface of the threshing device is disposed at substantially the same height as the axle of the non-steered wheel, and the center of gravity of the threshing device is lowered, thereby facilitating stable travel.

According to a preferred embodiment, the wheel traveling device includes a front wheel including the non-steering wheel and a rear wheel including the steering wheel.

According to the above configuration, since the front wheels are non-steering wheels that are not steered, the threshing device can be disposed sufficiently close to the inner end surface side of one of the front wheels. This makes it possible to make the threshing device to be positioned laterally to the left and right of the vehicle body, and to increase the space generated in the vehicle body frame on the side opposite to the side where the threshing device is positioned as much as possible. By thus making the space as large as possible, there are the following advantages: the present invention can be easily utilized as a space for arranging other devices such as an engine or other objects and a space for maintenance.

According to a preferred embodiment, the threshing device is disposed within a width of a space between the right and left wheels of the wheel traveling device in the right and left direction.

According to the above configuration, the height position of the threshing device can be set to a position lower than the upper portion of the wheels without being affected by the size of the diameters of the right and left wheels. Thus, the following advantages are provided: a wheel-propelled combine harvester which can easily and stably travel by setting the center of gravity of a threshing device low.

According to a preferred embodiment, the engine is disposed at a position substantially equal to the position of the vehicle body when viewed in the front-rear direction.

According to the above configuration, by disposing the outer end portion of the engine at substantially the same position as the outer end portion of the vehicle body in the lateral direction as viewed in the front-rear direction, there is an advantage that the space on the vehicle body frame can be effectively utilized by positioning the engine to the outer side as far as possible in the lateral direction of the machine body, and the maintenance of the engine can be easily performed.

According to a preferred embodiment, the outer end portion of the engine in the left-right direction is disposed at a position substantially equal to the outer end portion of the non-steered wheel in the left-right direction as viewed in the front-rear direction of the vehicle body.

According to the above configuration, the outer end portion of the engine is disposed at substantially the same position as the outer side end portion in the left-right direction of the non-steered wheel as viewed in the front-rear direction, and therefore, there are advantages in that: the non-steered wheels can be used as a protection mechanism for the engine, the engine can be arranged as far as possible to the lateral outside of the machine body, and the space on the vehicle body frame can be effectively used.

According to a preferred embodiment, the threshing device is of a straw-throwing type in which whole straws of the crop to be cut are thrown, the rotational axis of the stroking roller is arranged along the front-rear direction of the vehicle body at a position laterally offset from the center position in the left-right direction of the vehicle body, and the feeder for feeding the crop to the threshing device is arranged at a position laterally offset from the threshing device.

According to the above configuration, since the threshing device is of a full-stalk throw-in type in which the rotation axis of the threshing cylinder is arranged along the front-rear direction of the vehicle body, the threshing device is compact in the lateral width and simple in driving structure, and can efficiently perform processing without requiring direction change of the processed object, as compared with a structure in which a plurality of threshing cylinders different in the direction of the rotation axis are driven.

In addition, in the threshing device of the all-stalk-throw-in type in which the rotation axis of the stripping roller is along the front-rear direction of the vehicle body, even if the diameter of the stripping roller is not particularly increased, the treatment path can be set long by the axial length of the stripping roller, and therefore, even if a structure having a large diameter is not adopted as the stripping roller, it is easy to ensure the required treatment performance. Therefore, it is also advantageous in that the use of a large-diameter stripping roller can be avoided, and the center of gravity of the machine body can be increased.

Further, since the crop from the feeder is fed in the same direction as the direction of the flow of the crop from the front to the rear in the threshing device in which the rotation axis of the stripping roller is arranged along the front-rear direction of the vehicle body, the flow of the crop becomes a straight line, and smooth crop treatment is facilitated.

According to a preferred embodiment, a grain tank is disposed above the threshing device at a position overlapping the threshing device in a plan view.

According to the above configuration, since the grain tank is disposed above the threshing device, there is an advantage that the space on the vehicle body frame occupied by the threshing device is also used as the space for disposing the grain tank, and the capacity of the grain tank can be set large. Further, since the arrangement position of the grain tank in a plan view is not restricted by the presence of the threshing device, it is possible to set a stable position close to the center of the vehicle body, and it is also advantageous in that the weight balance of the vehicle body in the front, rear, left, and right directions is not easily changed by an increase or decrease in the amount of grains inside.

According to a preferred embodiment, the grain tank is disposed over an upper side of the threshing device and an upper side of the engine.

According to the above configuration, since both the upper side of the threshing device and the upper side of the engine can be used as the space for arranging the grain tank, there is an advantage that the capacity of the grain tank can be further increased.

According to a preferred embodiment, the grain tank is formed such that a bottom portion located above the engine is positioned lower than a bottom portion located above the threshing device.

According to the above configuration, the bottom of the grain tank is positioned so that the bottom of the grain tank on the engine side, which is lower than the threshing device, is lowered, and thus the capacity of the grain tank can be further increased.

According to a preferred embodiment, the grain tank is arranged to be suspended to both left and right sides of the threshing device.

According to the above configuration, the space portion is generated in the vehicle body frame, and the upper side of the space portion is covered with the grain tank arranged to be suspended to the left and right sides of the threshing device. Therefore, the space can be effectively used as an installation space or a maintenance space for other devices or other objects.

According to a preferred embodiment, the grain tank is formed to have a lateral width in the left-right direction larger than a height in the up-down direction.

According to the above configuration, the lateral width of the grain tank in the left-right direction is formed to be larger than the height in the up-down direction, so that the ground height of the grain tank is prevented from becoming excessively high, and the center of gravity of the machine body is easily prevented from becoming excessively high.

According to a preferred embodiment, the grain tank is disposed over substantially the entire width of the vehicle body frame in the left-right direction.

According to the above configuration, a space portion covered with the grain tank on the upper side is generated over substantially the entire width of the vehicle body frame in the left-right direction. Therefore, the space can be effectively used as an installation space or a maintenance space for other devices or other objects.

According to a preferred embodiment, the grain tank is supported by a support leg portion erected from the vehicle body frame.

According to the above configuration, since the grain tank is supported by the supporting leg portion erected from the vehicle body frame, a special strength structure for supporting the weight of the grain tank located on the upper side is not required on the threshing device side. Thus, there is an advantage that an increase in the overall weight including the threshing device can be avoided.

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

The combine harvester of the present invention is characterized in that a vehicle body frame is supported by a traveling device including a pair of left and right front traveling units and a pair of left and right rear traveling units, an engine is disposed on a right or left lateral side of a threshing device provided on the vehicle body frame, and a fuel tank is disposed on a lateral side of the threshing device on a side opposite to a side on which the engine is disposed.

According to the above configuration, by disposing the engine having a large weight per unit volume on the lateral side of the threshing device, instead of the upper portion of the machine body, the height of the engine with respect to the ground can be set relatively low, which is effective in that the center of gravity of the machine body can be set relatively low.

Further, it is effective in that the disturbance of the left-right balance of the machine body, which is likely to be biased by the engine being disposed on the lateral side of the threshing device, is corrected by disposing the fuel tank on the other side of the threshing device, so that the left-right balance is easily maintained in a good state, and the fuel tank itself is disposed at a low position, so that the center of gravity of the machine body is further lowered.

This makes it possible to realize a lower center of gravity and a more balanced left-right stabilization of the body of the combine harvester including the traveling device including the pair of left and right front traveling units and the pair of left and right rear traveling units, thereby further improving the traveling performance.

In a preferred embodiment, the engine is disposed between the front traveling section and the rear traveling section, and the fuel tank is disposed between the front traveling section and the rear traveling section.

According to the above configuration, since both the engine and the fuel tank are disposed between the front traveling section and the rear traveling section, even if the ground height of the front traveling section or the rear traveling section is high, the engine and the fuel tank can be disposed at a low position where there is little possibility of being restricted by the height, and it is effective in achieving low center of gravity of the machine body.

In a preferred embodiment, the engine and the fuel tank are disposed on the vehicle body frame.

According to the above configuration, the engine and the fuel tank having a large weight per unit volume are disposed on the vehicle body frame located at a relatively low position of the machine body, so that the ground heights of the engine and the fuel tank can be set relatively low, and it is effective in that the center of gravity of the machine body can be easily set relatively low.

In a preferred embodiment, a radiator is disposed on a lateral side of the threshing device at a position spaced apart from the engine in the front-rear direction.

According to the above configuration, the engine located on the lateral side of the threshing device is located on the lateral outside of the machine body, and the lateral outside thereof is easily opened, thereby providing an advantage that maintenance from the lateral outside is easily performed.

Further, the engine and the radiator are separated from each other in the front-rear direction, so that the width of the engine body in the left-right direction is not increased, and a working space for performing maintenance work on the engine and the radiator from the front-rear direction is easily secured, which is advantageous in that the maintenance work is more easily performed.

In a preferred embodiment, a grain tank is provided at an upper portion of the threshing device, and the grain tank stores grains after the threshing process.

According to the above configuration, since the grain tank is disposed above the threshing device, the space on the vehicle body frame occupied by the threshing device is also used as the space for disposing the grain tank, and there is an advantage that the capacity of the grain tank can be set large. Further, since the arrangement position of the grain tank in a plan view is not restricted by the presence of the threshing device, it is possible to set a stable position close to the center of the machine body, and it is also advantageous in that the weight balance of the machine body in the front, rear, left, and right directions is not easily changed by an increase or decrease in the amount of grains inside.

In a preferred embodiment, the grain box is horizontally long in the right-left direction of the body and has a bottom surface formed in a flat shape along a horizontal plane.

According to the above configuration, the upper portion of the threshing device is effectively used as a grain storage space, and thus there is an advantage that the height of the grain box can be prevented from being lowered and the center of gravity of the machine body can be prevented from being excessively raised while ensuring the capacity as the grain box.

In a preferred embodiment, the grain tank is configured to tilt about a horizontal axis, and an end portion of the grain tank on a side away from the horizontal axis moves to an upper side away from an upper surface of the threshing device.

According to the above configuration, the end portion on the side away from the lateral axis, which is the swing center of the grain tank, can be inclined so as to move to the side away from the upper surface of the threshing device. Therefore, there is an advantage that the upper surface side of the threshing device is effectively utilized as a space for arranging the grain tank, and maintenance work from the upper side of the threshing device can be performed without being hindered by the presence of the grain tank provided at the position.

In a preferred embodiment, the grain tank is configured to tilt with the horizontal axis at an end opposite to a side where the fuel tank is disposed.

According to the above configuration, even if the grain tank tilts about the lateral axis and the center of gravity of the grain tank slightly moves to the side where the lateral axis exists in the lateral direction of the body, since the fuel tank is located on the opposite side to the side where the lateral axis exists, the influence of the fluctuation of the lateral balance of the body due to the posture change of the grain tank is reduced, and the stable state is easily maintained.

In a preferred embodiment, a grain tank is provided above the engine, and the grain tank stores grains after the threshing process.

According to the above configuration, there is an advantage that the space above the engine can be effectively used by using the space for disposing the grain tank.

In a preferred embodiment, a grain tank is provided above the fuel tank, and the grain tank stores grains after the threshing process.

According to the above configuration, there is an advantage that the space above the fuel tank is also used as the space for disposing the grain tank, and the space above the vehicle body frame can be effectively used.

In a preferred embodiment, the grain tank is supported at a lateral position on the right or left side of the threshing device by a support leg portion erected from the vehicle body frame, and the fuel tank is attached to a support arm provided on the vehicle body frame.

According to the above configuration, since the grain tank on which the grain weight acts is supported by the support legs, the weight of the vehicle body frame is supported by the support arms, the weight of the fuel tank is supported by the support arms, and the weight of the vehicle body frame is supported by the vehicle body frame, it is not necessary that the threshing device itself has a structure having a strength capable of supporting the weight of the grain tank and the weight of the fuel tank. Therefore, there is an advantage that the weight reduction of the threshing device can be achieved.

In a preferred embodiment, the fuel tank is attached to be swingable around a swing axis in a vertical direction so as to be openable and closable to a fixed position where a lateral side surface of the fuel tank is along a lateral side wall of the threshing device and an open position where the lateral side surface is swung to move away from the lateral side wall of the threshing device.

According to the above configuration, there is an advantage that the fuel tank can be operated to swing to the open position, and maintenance work of various related devices mounted on the lateral side wall of the threshing device can be easily performed.

In a preferred embodiment, the swing axis of the fuel tank is provided in the vicinity of a lateral surface of a laterally outward side portion of the fuel tank which is separated laterally outward from a lateral wall of the threshing device.

According to the above configuration, since the pivot axis of the fuel tank is provided in the vicinity of the lateral surface of the lateral outer side portion of the fuel tank which is separated laterally outward from the lateral side wall of the threshing device, the entire fuel tank is opened more largely toward the side separated from the lateral side wall of the threshing device with the pivot axis as the center. This has the advantage that maintenance work is easier to perform.

[4] The solution corresponding to the problem [4] is as follows.

The combine harvester of the present invention is characterized in that an exterior cover is provided at an outer portion of the left and right lateral walls forming a threshing chamber of the threshing device, the exterior cover being configured to be swingable opened and closed to an open posture in which one end side of the exterior cover is a swing fulcrum and the other end side is swung to a side spaced apart from the left and right lateral walls, and a closed posture in which the exterior cover is a posture along the left and right lateral walls.

According to the above configuration, since the exterior cover itself can be configured to be opened and closed by swinging with one end side thereof serving as a swinging fulcrum, it is possible to perform the swinging opening and closing operation only by the exterior cover without opening and closing the lateral side walls.

Thus, any structure such as a simple detachable structure can be adopted as the structure of the lateral wall, and the problem of the decrease in the sealing performance of the stripping chamber accompanying the swing opening and closing of the lateral wall can be avoided.

Further, since the exterior cover can be opened and closed regardless of the opening and closing of the lateral side wall, the maintenance work of various devices disposed laterally to the threshing device can be easily performed.

Further, the space between the threshing device and the exterior cover is also advantageous in that the space can be effectively used for applications such as the arrangement of various devices as needed.

In a preferred embodiment, a part of the lateral side wall is detachably configured.

According to the above configuration, since the lateral side wall is configured to be detachable, the maintenance work of the inside of the stripping chamber can be easily performed by detaching the lateral side wall, and the sealing performance of the stripping chamber can be easily improved as compared with a structure in which the lateral side wall is opened and closed by swinging.

In a preferred embodiment, a second returning device is disposed outside the lateral wall of the threshing device and inside the outer cover, and the second returning device returns the second processed material from the sorting unit of the threshing device to the threshing unit.

According to the above configuration, since the second feeder is disposed outside the lateral wall of the threshing device and inside the exterior cover, the second feeder is exposed to the outside only by operating the exterior cover in the open posture, and thus the maintenance work is facilitated.

In a preferred embodiment, a grain box is provided above the threshing device, the grain box being configured to be tilted about a lateral axis and to move from an end on a side away from the lateral axis to an upper side away from an upper surface of the threshing device, the grain box storing grains after the threshing process.

In a preferred embodiment, the threshing device includes a top plate covering an upper surface side of the stripping chamber, and the top plate is configured to tilt about a swing axis along a front-rear direction of the lateral wall to open an upper side of the threshing device.

According to the above configuration, the upper surface side of the stripping chamber of the threshing device can be opened in a state where the grain tank is separated from the upper surface of the threshing device. Therefore, there is an advantage that maintenance from the upper side of the threshing device is easily performed without hindrance while the grain tank is provided above the threshing device.

In a preferred embodiment, the swing axis of the top plate is disposed on the same side as the side on which the horizontal axis of the grain tank is provided in the left-right direction of the machine body.

According to the above configuration, the top plate of the threshing device can be tilted in the same direction as the tilting direction of the grain tank. Therefore, compared to a case where the tilting direction of the top plate is opposite to the tilting direction of the grain tank, for example, there is no disadvantage that the upper portion of the threshing device cannot be sufficiently opened unless the tilting amount of the grain tank or the tilting amount of the top plate is made large, and there is an advantage that it is easy to open only the upper portion of the threshing device by an amount necessary for maintenance work.

In a preferred embodiment, a fuel tank is provided at a lateral side portion of the threshing device on a side opposite to a side where a lateral axis of the grain tank is provided.

According to the above configuration, even if the grain tank tilts about the lateral axis and the center of gravity of the grain tank slightly moves toward the side where the lateral axis exists in the left-right direction of the machine body, since the fuel tank is located on the side opposite to the side where the lateral axis exists, there is an advantage that the influence of the fluctuation of the left-right balance of the machine body due to the posture change of the grain tank is reduced and the stable state is easily maintained.

In a preferred embodiment, a fuel tank is disposed laterally of the threshing device, and the exterior cover is configured to cover a laterally outer side of the fuel tank in the closed posture and to open the laterally outer side of the fuel tank as the posture is changed to the open posture.

According to the above configuration, the fuel tank can be stored in a state in which the fuel tank is prevented from being exposed to the outside by setting the exterior cover to the closed position, and the fuel tank can be easily exposed to the outside by changing the position of the exterior cover to the open position.

Therefore, the fuel tank disposed by effectively utilizing the space on the lateral side of the threshing device can be easily switched between a storage state protected by the exterior cover and a maintainable state opened to the outside.

In a preferred embodiment, a fuel tank is disposed laterally of the threshing device, and the fuel tank is disposed outside the lateral wall at a position lower than a height position of a stripping drum provided in the threshing device.

According to the above configuration, since the fuel tank is provided outside the lateral wall of the threshing device, the fuel tank can be easily exposed to the outside only by changing the outer cover posture to the open posture, and maintenance of the fuel tank can be easily performed.

Further, since the height range in which the fuel tank is disposed is lower than the height position at which the knock-out roller is present, if the outer cover is removed or the structure is configured to be swingable in a direction deviating from the upper side of the fuel tank, the fuel tank can be looked at the upper side of the threshing device as a foothold, and there is an advantage that maintenance work can be performed more easily.

In a preferred embodiment, the fuel tank is attached to be swingable around a vertical swing axis so as to be openable and closable, the fuel tank being at a fixed position where the side surface in the front-rear direction of the fuel tank is along the lateral side wall, and at an open position where the side surface in the front-rear direction is swung to a side away from the lateral side wall.

According to the above configuration, since the fuel tank can be moved to the open position by swinging about the swing axis in the vertical direction, there is an advantage that maintenance of the lower portion of the threshing device and maintenance of the belt transmission mechanism and the like disposed along the lateral side of the threshing device are also facilitated.

In a preferred embodiment, an engine is provided on a lateral side of the threshing device, and the exterior cover is configured to cover a lateral outside of the engine in the closed posture and to open the lateral outside of the engine as the posture is changed to the open posture.

According to the above configuration, the engine located on the lateral side of the threshing device is located laterally outward of the machine body. Therefore, the outer side of the engine is protected by the exterior cover in the closed position, and the lateral outer side is easily opened by opening the exterior cover, thereby facilitating maintenance from the lateral outer side.

In a preferred embodiment, a radiator is disposed on a lateral side of the threshing device, and the exterior cover is configured to cover a lateral outer side of the radiator in the closed posture and to open the lateral outer side of the radiator as the posture is changed to the open posture.

According to the above configuration, the radiator located on the lateral side of the threshing device is located laterally outward of the machine body, which facilitates the intake of the outside air. Therefore, there is an advantage that the outer side of the radiator located laterally outward is protected in the closed posture of the outer cover, and the laterally outward side is easily opened by opening the outer cover, so that maintenance of the radiator from laterally outward is easily performed.

In a preferred embodiment, an engine is provided on a lateral side of the threshing device, and a radiator is disposed on the lateral side of the threshing device at a distance in the front-rear direction from the engine.

According to the above configuration, since the engine and the radiator are spaced apart from each other in the front-rear direction, a working space for performing maintenance work on the engine or the radiator from the front-rear direction can be easily secured without increasing the width of the engine body in the left-right direction, and the maintenance work can be performed more easily.

[5] The solution corresponding to the problem [5] is as follows.

The combine harvester of the present invention is characterized in that a vehicle body frame is supported by a traveling device including a pair of left and right front traveling units and a pair of left and right rear traveling units, an engine is disposed on a right or left lateral side of a threshing device provided on the vehicle body frame, and a transmission is disposed on a front side of the threshing device, the transmission shifting power transmitted from the engine side and outputting the power to the front traveling units.

According to the above configuration, by disposing the engine having a large weight per unit volume on the lateral side of the right or left side of the threshing device, instead of the upper portion of the machine body, the height of the engine to the ground is made relatively low, and it is effective in that the center of gravity of the machine body can be positioned relatively low.

The transmission that outputs to the forward traveling portion is disposed at a position closer to the forward traveling portion in front of the threshing device, and the engine that is located at the lateral side of the threshing device is disposed at a position closer to both the threshing device and the transmission. Therefore, the transmission path from the engine to the threshing device and the transmission can be made as short as possible, and it is advantageous in that the transmission structure for forming the transmission path can be made compact with ease.

This has the advantage that the body of the combine harvester equipped with the traveling device including the pair of left and right front traveling units and the pair of left and right rear traveling units can be made low in center of gravity and the transmission structure can be made compact.

In a preferred embodiment, a radiator is provided at a position apart from the engine in the front-rear direction on a lateral side of the threshing device.

According to the above configuration, since the engine is located on the lateral side of the threshing device, the lateral outside thereof is easily opened to perform maintenance from the lateral outside, and the radiator is disposed at a position apart from the engine in the front-rear direction, it is possible to secure a working space for performing maintenance work from the front-rear direction on the engine and the radiator, respectively, and therefore, it is advantageous in that the maintenance work is more easily performed.

In a preferred embodiment, a grain tank for storing grains is provided at a position above the engine.

In a preferred embodiment, the power input portion of the grain tank is disposed at a position above the engine.

According to the above configuration, the space above the engine is used as the space for arranging the power input portion to the grain tank, so that the power transmission path from the engine to the grain tank can be easily made short, and the transmission structure can be made compact.

In a preferred embodiment, the lateral side portion of the threshing device is provided with an intermediate shaft that transmits power of the engine from one side where the engine is disposed to the other side of the threshing device, and the intermediate shaft is configured to transmit the engine power to the threshing device via a power transmission portion provided on the other side of the threshing device.

According to the above configuration, the power transmission unit of the threshing device can be disposed on the lateral side portion of the threshing device opposite to the side on which the engine is disposed, and the power transmission unit can be prevented from being staggered with various transmission systems around the engine.

In a preferred embodiment, the transmission is disposed between the front traveling units, and a 1 st output shaft and a 2 nd output shaft are supported by a transmission case of the transmission, the 1 st output shaft being connected to a power transmission system that transmits power to the front traveling units located on the left and right of the transmission, the 2 nd output shaft being connected to a power transmission system that transmits power to the rear traveling units, and a drive transmission tool disposed in the front-rear direction along the lateral side of the threshing device, the drive transmission tool transmitting power from the 2 nd output shaft to the rear traveling units.

According to the above configuration, there is an advantage that the drive transmission tool as the power transmission path from the transmission case to the backward traveling portion is displaced from below the open area on the lower surface side of the threshing device, and maintenance work for easily opening the lower surface side of the threshing device is facilitated without any trouble.

Other features and advantageous effects of the present invention will become apparent upon reading the following description with reference to the accompanying drawings.

Drawings

Fig. 1 is a right side overall side view of a combine harvester according to embodiment 1 (hereinafter, the same applies to fig. 13).

Fig. 2 is a left side overall side view of the combine harvester.

Fig. 3 is an overall plan view of the combine harvester.

Fig. 4 is an overall rear view of the combine harvester.

Fig. 5 is an overall front view of the combine harvester.

Fig. 6 is a perspective view showing a frame structure.

Fig. 7 is a plan view showing a frame structure.

Fig. 8 is a perspective view showing a frame structure.

Fig. 9 is a rear view showing the frame structure.

Fig. 10 is a plan view showing a frame structure of a vehicle body front portion.

Fig. 11 is a front view showing a frame structure.

Fig. 12 is a side view showing a frame structure.

Fig. 13(a) and (b) are diagrams showing an intake and exhaust structure of an engine.

Fig. 14 is a right side view of a general-type combine harvester according to embodiment 2 (hereinafter, the same as in fig. 22).

Fig. 15 is a left side view of a general type combine harvester.

Fig. 16 is an overall plan view of a general type combine harvester.

Fig. 17 is a front view of a general type combine harvester.

Fig. 18 is a plan view showing a vehicle body frame.

Fig. 19 is an exploded perspective view showing the arrangement relationship of the respective devices with respect to the vehicle body frame.

Fig. 20 is a side view showing the arrangement relationship of each device with respect to the vehicle body frame.

Fig. 21 is a sectional view taken along line XXI-XXI of fig. 20.

Fig. 22(a) to (d) are explanatory views showing another embodiment.

Fig. 23 is a right side view of a general-type combine harvester according to embodiment 3 (hereinafter, the same as in fig. 51).

Fig. 24 is a right side view showing a state where an exterior cover of a general type combine harvester is removed.

Fig. 25 is a left side view showing a state where an exterior cover of a general type combine harvester is removed.

Fig. 26 is a left side view showing a state where an exterior cover, a fuel tank, and a belt transmission mechanism of a general-type combine harvester are removed.

Fig. 27 is an overall plan view of a general type combine harvester.

Fig. 28 is a plan view showing a state where a grain tank of a general type combine harvester is removed.

Fig. 29 is a front view of a general type combine harvester.

Fig. 30 is a plan view showing a vehicle body frame.

Fig. 31 is an exploded perspective view showing the arrangement relationship of the respective devices with respect to the vehicle body frame.

Fig. 32 is a vertical sectional view of the threshing device in the front-rear direction.

Fig. 33 is a side view showing the left side plate attached to the frame.

Fig. 34 is a front cross-sectional view showing an upper part of the threshing apparatus.

Fig. 35 is a front cross-sectional view showing a state in which the side plate is attached to and detached from the frame.

Fig. 36 is a side view showing a right lateral side of the threshing apparatus.

Fig. 37 is a rear view showing a mounting structure of the fuel tank and the exterior cover on the left lateral side.

Fig. 38 is a plan view showing a swing operation state of the fuel tank.

Fig. 39 is a rear view showing a mounting structure of the exterior cover on the right lateral side.

Fig. 40 is a perspective view showing the threshing device and the grain tank.

Fig. 41 is a right side view showing the threshing device and the winnowing device.

FIG. 42 is a front view showing the threshing device and grain tank.

Fig. 43(a) and (b) are explanatory views showing an operation state of the grain tank.

FIG. 44 is a perspective view showing a grain discharge port part of the grain tank.

Fig. 45 is a side view showing the transmission.

Fig. 46 is a diagram showing a power transmission system of the traveling system.

Fig. 47 is a diagram showing a power transmission system of the work system.

Fig. 48 is a right side view showing another embodiment of a general type combine harvester.

Fig. 49 is an overall plan view showing another embodiment of a conventional combine harvester.

Fig. 50 is a partially cut-away side view showing a power transmission structure to a grain tank according to another embodiment.

Fig. 51 shows another embodiment of the power transmission structure at the threshing device portion, which is a vertical cross-sectional view taken along the front-rear direction.

Detailed Description

[ embodiment 1]

Hereinafter, embodiment 1 will be described with reference to the drawings. Each embodiment applies the invention to a combine harvester (more specifically, a general-type combine harvester or a whole stalk-throwing combine harvester) as an example of a harvesting harvester.

As shown in fig. 1 to 3, the combine harvester supports a harvesting and conveying part 4 for harvesting and conveying a crop rearward in a front part of a travel vehicle body 3 including a pair of left and right non-steerable front wheels 1 and a pair of left and right steerable rear wheels 2, in a manner to be driven and lifted by a harvesting and lifting cylinder 5 serving as a lifting actuator around a lateral fulcrum P1, and includes a riding operator 7 located on a front part side and covered with a cabin 6, a threshing part 8 for performing threshing of the crop harvested by the harvesting and conveying part 4, a grain box 9 for storing grains obtained by threshing by the threshing part 8, a driving engine 10, and the like, on the travel vehicle body 3. The traveling vehicle body 3 is configured such that both left and right side portions thereof are covered with covers 62.

The harvesting and conveying unit 4 includes a harvesting unit 11 for harvesting the planted crop and collecting the harvested crop toward the center in the cutting width direction, and a feeder 12 for conveying the harvested crop collected at the center toward the threshing unit 8 at the rear of the machine body.

As shown in fig. 3, the harvesting unit 11 includes a pusher-type cutter 13 for cutting the roots of the crops, a horizontal conveyance auger 14 for gathering the harvested crops at the center in the cutting width direction, a rotary reel 15 for raking the ear tips of the crops to be harvested rearward, and the like. Although not shown, the feeder 12 is configured such that a pair of left and right endless rotating chains are wound and stretched in the front-rear direction in a square tubular feeder box, a conveyor is provided across the left and right endless rotating chains at appropriate intervals in the circumferential direction, and the crop delivered from the cutting section 11 is conveyed rearward and upward by the conveyor.

Next, a vehicle body support structure of the traveling vehicle body 3 will be described.

As shown in fig. 6 to 8, the vehicle body frame F of the traveling vehicle body 3 is configured to include a plurality of front-rear direction frame bodies 17 provided in a state of being positioned on both the left and right sides of the traveling vehicle body 3 and extending in the front-rear direction of the traveling vehicle body 3, and a plurality of lateral direction frame bodies 18 extending in the lateral direction of the traveling vehicle body 3.

Specifically, as an example of the plurality of front-rear direction frames 17, a pair of left and right front-rear direction frames 17R and 17L are provided, and the pair of left and right front-rear direction frames 17R and 17L are formed in a substantially コ -shaped cross section and are provided in a state extending long over the entire length in the front-rear direction of the vehicle body from a position corresponding to substantially the center portions of the left and right front wheels 1 to a position corresponding to substantially the center portions of the left and right rear wheels 2 when viewed from the side of the vehicle body.

As shown in fig. 9, the pair of right and left front-rear direction frames 17R, 17L are formed in a substantially コ -shaped cross section and are provided in a state extending long over the entire length in the vehicle longitudinal direction from a position corresponding to substantially the center portions of the right and left front wheels 1 to a position corresponding to substantially the center portions of the right and left rear wheels 2 when viewed from the side of the vehicle body.

The pair of front-rear facing frames 17R and 17L are provided so as to be positioned on the inner side in the vehicle transverse width direction than the pair of front wheels 1 and the pair of rear wheels 2, and a distance L1 from a center CL in the vehicle transverse width direction of the pair of front-rear facing frames 17R and 17L to the vehicle transverse width direction of the front-rear facing frame (17R or 17L) is larger than a distance (L2, L3) in the vehicle transverse width direction between the front-rear facing frame (17R or 17L) and the front wheels 1 and the rear wheels 2.

That is, as shown in fig. 9, a distance L1 between the pair of front and

rear frames

17R and 17L in the vehicle transverse width direction and the center CL in the vehicle transverse width direction to the front and rear frames (17R or 17L) is larger than a distance L2 between the left and right front and rear frames (17R or 17L) and the left and right front wheels 1 in the vehicle transverse width direction, and a distance L1 between the center CL in the vehicle transverse width direction and the front and rear frames (17R or 17L) in the vehicle transverse width direction is larger than a distance L3 between the left and right front and rear frames (17R or 17L) and the left and right rear wheels 2 in the vehicle transverse width direction.

In this way, the pair of right and left front and rear facing

frame bodies

17R and 17L are disposed in a state of being spaced apart by a wide interval in the lateral width direction of the traveling vehicle body 3 and in a state of being as close as possible to the right and left front wheels 1 and the rear wheels 2.

As shown in fig. 7 and 8, 6 lateral frame bodies 18a to 18F are provided as the plurality of lateral frame bodies 18 in a state extending in the lateral direction of the traveling vehicle body 3 and spaced apart in the front-rear direction, and the lateral frame bodies 18a to 18F and the pair of front-

rear frame bodies

17R and 17L are combined in a lattice shape in a plan view to form a vehicle body frame F.

The vehicle body front end portions of the pair of front and

rear frame bodies

17R, 17L are connected to each other by the front side lateral frame body 18a located at the foremost part in the vehicle body front-rear direction among the 6 lateral frame bodies 18a to 18f, and the vehicle body rear end portions of the pair of front and

rear frame bodies

17R, 17L are connected to each other by the rear side lateral frame body 18f located at the rearmost part in the vehicle body front-rear direction among the 6 lateral frame bodies 18a to 18 f.

The vehicle body frame F is configured to include a projecting frame portion Fh projecting outward in the vehicle transverse width direction from the pair of front and

rear frame bodies

17R and 17L in the vehicle longitudinal direction at a portion located between the front wheel 1 and the rear wheel 2.

That is, 3 lateral frames 18c to 18e located between the front wheel 1 and the rear wheel 2 out of the 6 lateral frames 18a to 18f project from the front and rear toward the

frames

17R and 17L outward in the vehicle transverse width direction, and the projecting frame portions Fh are formed by portions of these projecting lateral frames 18c to 18e projecting from the front and rear toward the

frames

17R and 17L outward in the vehicle transverse width direction.

As shown in fig. 7, the engine 10 is mounted in a state supported by a projecting frame portion Fh projecting to the outside right side of two projecting

lateral frame bodies

18c, 18d located at the front portion of the vehicle body, of the 3 projecting lateral frame bodies 18c to 18 e.

Specifically, as shown in fig. 8 and 9, the following structure is provided: the engine 10 is mounted and supported on the upper portion of the projecting frame portion Fh projecting to the right outer side of the two projecting

lateral frame bodies

18c and 18d located on the front portion of the vehicle body and the upper portion of the right front-rear frame body 17R. Further, in order to connect the outer side ends of the two

lateral frames

18c and 18d of the extension type to each other by the front-rear direction connecting frame 19, the reinforcing frame 20 is connected between the rear end of the front-rear direction connecting frame 19 and the right front-rear direction frame 17R.

In this way, the engine 10 is supported with sufficient support strength by the right front-rear direction frame 17R, the two lateral direction frames 18c and 18d of the extension type, the front-rear direction connecting frame 19, the reinforcing frame 20, and the like. Incidentally, reinforcing ribs 21 having a longitudinally oriented surface are provided on the lower surface side of the reinforcing frame body 20.

The interval between the two extension-type

lateral frame bodies

18d, 18e located at the rear of the vehicle body among the 3 extension-type lateral frame bodies 18c to 18e is set to be wider than the interval between the two extension-type

lateral frame bodies

18c, 18d located at the front of the vehicle body.

As shown in fig. 7, front wheel drive cases 22 for driving to transmit power to the front wheels 1 on both left and right sides are fixedly coupled to both left and right end portions of the frame body 18a on the front side, respectively, and the front wheel drive cases 22 are configured to support the front wheels 1 in a steerable manner such that the power of the engine 10 is transmitted through the transmission M and the front wheels 1 are rotatably driven. Therefore, the pair of left and right front wheels 1 are supported in a steerable manner by the left and right side end portions of the front side lateral frame body 18 a.

As shown in fig. 5, feeder 12 of cutting and conveying unit 4 is disposed below cabin 6, and feeder 12 is disposed at a position shifted to the left in the lateral direction of the vehicle body with respect to the center in the lateral direction of the vehicle body. The transmission M is provided in a state of being located below the cabin 6 and in a state of being located on the right side (left side in fig. 5) with respect to the feeder 12 of the cutting and conveying section 4 as viewed in the row direction.

As shown in fig. 4, the rear axle boxes 23 supporting the pair of right and left rear wheels 2 are supported to be swingable about vehicle body longitudinal axes X1 with respect to the rear lateral frame bodies 18 f. That is, left and right rear wheels 2 are pivotally supported on both left and right side portions of a cylindrical rear axle box 23 extending in the vehicle transverse direction about a longitudinal axis Y1 in a swingable manner, and a left and right intermediate portion of the rear axle box 23 is pivotally supported and coupled about a vehicle front-rear axis X1 with respect to a support bracket 25 provided on a rear side transverse frame body 18 f. Therefore, the left and right rear wheels 2 are supported integrally with the rear axle boxes 23 so as to be swingable around the vehicle body front-rear axle cores X1.

As shown in fig. 8, the rear axle box 23 is provided so as to be positioned on the rear side and laterally below the frame body 18f, and the wheel support H1 bridging and connecting the rear side and laterally below the pair of front and

rear frame bodies

17R, 17L and the frame body 18f is formed so as to be positioned on the upper side with respect to the body portion H2 positioned on the vehicle body front side and positioned at substantially the same height as the rear axle box 23. That is, the pair of front-rear

direction frame bodies

17R, 17L includes a main body portion H2 positioned at substantially the same height as the rear axle box 23, and a wheel support portion H1 extending rearward and upward from the main body portion H2 so as to be positioned above the rear axle box 23.

As shown in fig. 7 and 8, a front-rear auxiliary frame 26 is bridged across two

lateral frames

18d and 18e located on the vehicle body rear side between the left and right intermediate portions of the pair of left and right front-

rear frames

17R and 17L. The threshing portion 8 is provided in a state of being placed and supported by the left front-rear direction frame body 17L, the auxiliary frame body 26, and the three protrusion type lateral

direction frame bodies

18c, 18d, and 18e, respectively. The trough 8 is provided in a state of being positioned on the left lateral side of the engine 10, and in a state of being displaced to the left side from the lateral direction center of the traveling vehicle body 3.

Therefore, the engine 10 is supported by the front-rear direction frame body 17R of one (right side) of the pair of front-rear

direction frame bodies

17R and 17L, and the valley portion 8 is supported by the front-rear direction frame body 17L of the other (left side) of the pair of front-rear

direction frame bodies

17R and 17L.

As shown in fig. 9, the grain tank 9 is positioned above the threshing unit 8, and is configured to have a wide width in the lateral direction over the threshing unit 8 and over a projecting frame portion Fh including the engine 10 projecting to the right outside. As shown in fig. 8, the vehicle body frame F is supported by a box supporting frame body 27 extending in a state of standing from the vehicle body frame F at a portion corresponding to the projecting frame portion Fh projecting to the outside on the right side.

As shown in fig. 7 and 8, the box supporting frame 27 is provided at each of (4) the laterally outer side portion and the body inner side portion (the portion connected to the right front-rear direction frame 17R) of the reinforcing frame 20 and the laterally outer side portion and the body inner side portion (the portion connected to the right front-rear direction frame 17R) of the extension type laterally toward the frame 18e located at the rearmost part of the vehicle body, and the grain box 9 is configured to be supported by these 4 box supporting frames 27. Further, a reinforcing rib 28 similar to the reinforcing frame body 20 is provided at the lower portion of the extension-type lateral frame body 18e located at the rearmost portion of the vehicle body.

The base end portion of the cutting lift cylinder 5 that drives the cutting conveying portion 4 to be raised and lowered is supported by a vehicle body front portion side portion of the vehicle body frame F.

That is, as shown in fig. 10 and 11, the transverse frame 18b, which is positioned at the 2 nd from the front side among the 6 transverse frames 18a to 18f, is positioned on the lower surface side of the pair of front and

rear frames

17R and 17L, and the pair of front and

rear frames

17R and 17L are connected to each other, and the cylinder bracket 29 is fixedly extended from the middle portion in the transverse width direction of the transverse frame toward the front of the machine body. The base end portion of the cutting lift cylinder 5 is pivotally supported and connected to the distal end portion of the cylinder bracket 29 so as to be swingable around a lateral axis P2 (see fig. 12).

The cylinder bracket 29 is configured to fixedly couple the reinforcing member 30 extending obliquely downward from the front side laterally toward the frame body 18a, and fixedly couple the reinforcing member 31 extending laterally from the left front-rear direction toward the frame body 17L, so that the support strength is improved, and the weight of the harvesting and conveying unit 4 can be supported well.

Since the vehicle body frame F is configured as described above, as shown in fig. 7, the vehicle body frame F is provided with a pair of front and rear facing

frame bodies

17R and 17L and a projecting frame body Fh in a state where recessed portions Q are formed at positions corresponding to four corners of the traveling vehicle body 3 in a plan view, and the left and right front wheels 1 and the left and right rear wheels 2 are respectively disposed in the recessed portions Q.

Next, a support structure of the boarding driving unit 7 covered by the cabin 6 will be described.

As shown in fig. 6 and 8, a pair of left and right vertical frames Ft erected from a pair of left and right front and rear sides of the vehicle body frame F toward the

frame bodies

17R and 17L, respectively, is provided at the front portion of the traveling vehicle body 3, and the riding cab 7 (cabin 6) is supported by the upper end portions of the pair of left and right vertical frames Ft. The pair of left and right vertical frames Ft are respectively provided with an inner frame body 33 erected on the inner side in the vehicle transverse width direction of the pair of left and right front wheels 1, and an outer frame body 34 erected on the vehicle rear side of the pair of left and right front wheels 1.

The inner frame 33 will be described.

The left and right inner frame bodies 33 are respectively constituted by an inclined inner frame body 33A erected upward toward the front of the vehicle body from the front and rear of the vehicle body frame F toward the

frame bodies

17R, 17L, and an upright inner frame body 33B erected upward directly from the front and rear toward the

frame bodies

17R, 17L. The upper end of the inclined inner frame 33A and the upper end of the upright inner frame 33B are connected by a front-rear direction connecting body 37.

To explain this, as shown in fig. 12, 3 inner frames 33 are fixed and erected in a state extending upward from the mounting

brackets

38R, 38L integrally connected to the front side portions of the pair of left and right front and rear facing frames 17R, 17L, respectively.

Of the 3 inner frames 33, the inner frame 33 located at the middle in the front-rear direction is constituted by an upright inner frame 33B erected directly above from the pair of left and right front-rear direction frames 17R, 17L, and the remaining two inner frames 33 are constituted by inclined inner frames 33A erected directly above the vehicle body front from the pair of left and right front-rear direction frames 17R, 17L.

As shown in fig. 11, the upper end portions of the 3 inner frames 33 are integrally connected and fixed to each other by a front-rear direction connecting body 37 extending in the vehicle body front-rear direction. The front-rear direction connecting member 37 is formed of a channel member, and is configured such that 3 inner frame bodies 33 are fitted into an コ -shaped inner space thereof and integrally connected.

As shown in fig. 12, the lower portions of the two inner frames 33 on the front side are coupled, and the upright inner frame 33B on the rear side is erected directly upward, and the inclined inner frame 33A on the front side is inclined forward as it goes upward, and the two inner frames 33(33A, 33B) are disposed in a state spaced upward. The mounting position of the lower portion of the rear-end inner frame body 33 (rear-side inclined inner frame body 33A) is a position spaced further to the rear side than the upright inner frame body 33B, and is set in an inclined posture so as to be closer to the upper end portion of the upright inner frame body 33B as it goes upward.

A substantially triangular shape in side view is formed by the upright inner frame body 33B, the front inclined inner frame body 33A, and the front-rear direction connecting body 37, a substantially triangular shape in side view is formed by the rear inclined inner frame body 33A, the upright inner frame body 33B, and the mounting

brackets

38R, 38L integrally connected to the front portions of the front-rear

direction frame bodies

17R, 17L, and a supporting structure corresponding to a truss structure is formed by these respective frame bodies. Therefore, the cab 7 (cabin 6) is supported and mounted with sufficient support strength.

Next, the outer frame 34 will be described.

As shown in fig. 10, 11, and 12, the lower end portions of the right and left outer frames 34 are connected to both end portions in the lateral width direction of the lateral frame 18c located at the vehicle body foremost portion of the 3-piece projecting

lateral frame

18c, 18d, and 18e via connecting brackets 39, respectively, and are provided in a state of being extended from the lower end portions thereof in a state of being bent substantially in an arc shape toward the vehicle body front upper side.

A front-rear direction connecting member 40 in a square tube shape extending in the vehicle body front-rear direction is fixed to an upper end portion of the outer frame body 34, and a pair of front-rear direction connecting members 41 are bridged and connected across both side portions of the front-rear direction connecting member 40 in the vehicle body front-rear direction and the front-rear direction connecting body 37. The cab 7 (cabin 6) is supported by the lateral connecting member 41 at a total of 4 locations at two locations on the left and right sides, respectively, via the cushion member 42.

In this way, the outer frame 34 and the inner frame 33 are integrally connected by the front-rear direction connecting member 40, the pair of front-rear direction connecting members 41, and the front-rear direction connecting member 37, respectively, to constitute the vertical frame Ft, and the cabin 6 is supported by the upper ends of the pair of left and right vertical frames Ft erected from the pair of left and right front-rear

direction frame bodies

17R and 17L, respectively.

As described above, the vertical frame Ft has a structure including the inclined inner frame body 33A erected upward toward the vehicle body front from the pair of left and right front and rear

direction frame bodies

17R, 17L, and as shown in fig. 12, the riding section 7 (cabin 6) is provided in a front protruding state in which the front end portion thereof is displaced toward the vehicle body front side than the front end portions of the pair of left and right front and rear

direction frame bodies

17R, 17L.

In this way, the riding operator 7 (cabin 6) is supported by the vertical frames Ft on the left and right sides in a state where a space is formed on the lower side thereof, and the feeder 12 of the harvesting and conveying unit 4 is configured to convey the harvested crop to the rear through the space between the vertical frames Ft on the left and right sides and the lower side of the riding operator 7 (cabin 6).

As shown in fig. 1 and 2, the cabin 6 includes a plurality of illumination lamps 43 as illumination devices for illuminating the vehicle body front outer side and the vehicle body lateral width direction outer side.

As shown in fig. 5, two front lamps 43a for illuminating the distant area on the front side of the vehicle body are provided on the left and right sides of the lower portion of the front surface portion of the cabin 6, and two cutting area lamps 43b for illuminating the cutting target area in front of the vehicle body are provided on the left and right sides of the upper portion of the front surface portion of the cabin 6. Further, in front upper portions of the left and right side portions of the cabin 6, there are provided 1 side lamps 43c for illuminating the outer side in the lateral width direction of the vehicle body, respectively.

As shown in fig. 5, the riding section 7 (cabin 6) is provided over each of the upper portions of the pair of left and right front wheels 1 in front view, and a stepped portion 45 is provided at a portion of the cabin 6 that is located outside a door 44 on the right side (one side in the lateral width direction of the vehicle body), and an end position 6L on the left side (one side in the lateral width direction of the vehicle body) of the cabin 6 and an end position 3L on the left side of the traveling vehicle body 3 are set at substantially the same position in the lateral width direction of the vehicle body, and an end position 45R on the right side of the stepped portion 45 and an end position 3R on the right side of the traveling vehicle body 3 are set at substantially the same position in the lateral. A ladder 60 for the driver to get on and off the riding section 7 from outside the vehicle body is provided on the cabin 6 at a position outside the left door 46.

As shown in fig. 3, the right access door 44 of the cabin 6 is openably and closably provided around a longitudinally oriented swing fulcrum Y2 on the vehicle body front side, and the left access door 46 of the cabin 6 is openably and closably provided around a longitudinally oriented swing fulcrum Y3 on the vehicle body rear side.

The cabin 6 is provided with side mirrors 47 for rear confirmation on both left and right sides, and the side mirrors 47 are adjustable in angle, so that the angle can be adjusted according to the work situation. The left side mirror 47 of the cabin 6, on which the step portion 45 is not provided, is openable and closable about the vertical swing fulcrum Y3 on the vehicle body rear side, so that the adjustment work can be performed with the door 46 open from the riding operator 7. On the other hand, the side mirror 47 on the right side of the cabin 6 cannot be adjusted in a state where the door 44 is opened, but the operator can perform work by moving on the step portion 45 while closing the door 44.

As described above, the engine 10 is supported by the front portion of the extension frame portion Fh extending to the outer right side and is configured to be disposed in a state of being positioned on the vehicle body rear lower side of the cabin 6.

An exhaust pipe 49 through which exhaust gas of the engine 10 flows and an intake pipe 50 through which combustion air taken in by the engine 10 flows are provided in a state of extending in the vertical direction along the rear side surface 6A of the cabin 6 and in a state of being spaced apart upward from a pre-cleaner 52 as an air intake part formed at an upper end of the intake pipe 50 by an exhaust gas discharge part 51 formed at an upper end of the exhaust pipe 49.

Further, as shown in fig. 3, a grain conveyor 53 that conveys grains from the threshing section 8 to the grain tank 9 is provided in a state of being positioned between the grain tank 9 and the cabin 6, and an exhaust pipe 49 and an intake pipe 50 are provided between the grain tank 9 and the cabin 6 at a right side portion in the lateral width direction of the body of the grain conveyor 53.

Specifically, as shown in fig. 13, an exhaust pipe 49 is provided for guiding the exhaust gas of the engine 10 upward along the rear side surface 6A of the cabin 6 after passing through an exhaust muffler 54 located above the engine 10. The exhaust pipe 49 is provided at a position along the rear side surface 6A of the cabin 6 and corresponding to the right end portion of the cabin 6, and is provided in a state where the exhaust gas discharge portion 51 formed at the upper end portion thereof is at substantially the same height as the ceiling portion 6B of the cabin 6.

The exhaust pipe 49 and the intake pipe 50 are provided at a position along the rear side surface 6A of the cabin 6 and corresponding to the right side end portion of the cabin 6, and the intake pipe 50 is provided at a position closer to the body lateral width direction outer side of the cabin 6 in the right side end portion of the cabin 6. On the other hand, the exhaust pipe 49 is provided at a portion near the center side in the lateral width direction of the machine body of the cabin 6, in the right side end portion of the cabin 6.

As shown in fig. 13, an intake pipe 50 for supplying combustion air to the engine 10 is provided at a position along the rear side surface 6A of the cabin 6 and corresponding to the right end of the cabin 6, and is provided in a state where the pre-cleaner 52 is positioned at substantially the same height as the vertical middle portion of the cabin 6, as in the exhaust pipe 49.

An air cleaner 55 for cleaning air is interposed in the intake path of combustion air formed by the intake pipe 50. The air cleaner 55 interposed in the intake path is mounted in a state of being supported by a mounting table 57, and the mounting table 57 is formed at the rear of the cabin 6 at substantially the same height as the cab step 56 on which the cab 7 is mounted.

If stated, the following structure is provided: a mounting table 57 is formed at a right end portion of the rear side surface 6A of the cabin 6 at a height substantially equal to the height of the cab step 56, and the air cleaner 55 is mounted on the mounting table 57 in a state of protruding outward to the right side from the right side surface 6C of the cabin 6 and is supported in a fixed position.

With the structure in which the air cleaner 55 is supported on the platform 57 in this way, when the driver performs cleaning or maintenance work on the air cleaner 55, work can be efficiently performed from the step portion 45 provided on the outer side of the right door 44 of the cabin 6 without getting down from the vehicle body. In addition, since the pre-cleaner 52 is provided in a state of protruding outward to the right side from the right side surface 6C of the cabin 6 in addition to the air cleaner 55, the maintenance work of the pre-cleaner 52 is also easily performed.

Although the specific configuration is not described in detail, the grain discharging unit 58 for discharging the grains stored in the grain tank 9 to the outside of the machine body is provided in a state of being positioned on the right side in the lateral width direction of the vehicle body, and the grain discharging state of the grain tank 9 can be confirmed from the step portion 45.

[ other modes for carrying out the embodiment 1]

(1) In the above embodiment, the structure in which the pair of right and left front and rear

direction frame bodies

17R and 17L are configured to extend over the entire length of the traveling vehicle body 3 is shown, but may be provided over a range shorter than the entire length of the traveling vehicle body 3.

(2) In the above embodiment, the engine 10 is supported by the front portion of the extension frame portion Fh, but may be supported by the rear portion of the extension frame portion Fh or supported over the entire range in the front-rear direction of the extension frame portion Fh. Further, as a configuration in which the extension frame portion Fh is not provided in the vehicle body frame F, the engine 10 may be supported only by the front-rear

direction frame bodies

17R and 17L.

(3) In the above embodiment, the configuration in which the auxiliary frame body 26 oriented in the front-rear direction is provided between the pair of front-rear oriented

frame bodies

17R, 17L is shown, but a configuration in which such an auxiliary frame body 26 is not provided may be adopted.

(4) In the above embodiment, the grain tank 9 is provided above the threshing section 8, but instead of this configuration, the grain tank 9 and the threshing section 8 may be provided in a state arranged in the lateral direction or the front-rear direction.

(5) In the above embodiment, the configuration is shown in which the trough 8 is disposed such that the front end thereof is located forward of the front end of the extension frame portion Fh in a side view, but the trough 8 may be disposed such that the front end thereof is located rearward of the front end of the extension frame portion Fh in a side view.

(6) In the above embodiment, the vehicle body frame F has a configuration in which the front-side lateral frame body 18a connecting the vehicle body front end portions of the pair of front-

rear frame bodies

17R, 17L and the rear-side lateral frame body 18F connecting the vehicle body rear end sides are provided, but it may be configured such that the front-rear end portions of the front-

rear frame bodies

17R, 17L are not connected to each other, and only the middle portion in the front-rear direction is connected to each other.

(7) In the above embodiment, the rear axle box 23 supporting the pair of left and right rear wheels 2 is supported so as to be swingable around the vehicle body front-rear axle center X1, but the rear axle box 23 or the rear wheels 2 may be mounted in a fixed posture.

(8) In the above-described embodiment, the combine is shown as the harvesting harvester, but the harvesting harvester is not limited to the combine, and may be a harvesting harvester such as a corn harvester that harvests the harvested crops in a state of being stacked without threshing the harvested crops. That is, the present invention can be applied to a harvesting machine such as a combine harvester or a corn harvester, which includes a harvesting and conveying unit for harvesting and conveying a crop to the rear on a traveling vehicle body.

[2 nd embodiment ]

Hereinafter, embodiment 2 will be described with reference to the drawings.

[ integral structure of combine harvester ]

Fig. 14 to 16 show left and right side surfaces and an entire plane of a general combine harvester according to the present invention. As shown in these figures, a conventional combine according to the present invention includes a traveling device 102 including a pair of left and right front wheels 102F and a pair of left and right

rear wheels

102R and 102R on a lower side of a vehicle body frame 101.

The self-propelled vehicle body is configured by a cabin 103 provided in the front part of the vehicle body frame 101, a threshing device 104 and a grain tank 105 provided in the rear part thereof, a straw discharge processing device 106 provided in the rearmost part thereof, and a harvesting processing device 107 provided to be movable up and down around a horizontal cross axis x1 with respect to the vehicle body frame 101.

An engine 108 for transmitting a driving force to the traveling device 102, the threshing device 104, the harvesting processing device 107, and the like is provided on the right lateral side of the threshing device 104 with a crankshaft (not shown) extending in the left-right direction of the vehicle body.

The power transmitted from a transmission case 109 (including a general term of a transmission mechanism inside, corresponding to a transmission) attached to the front portion of the vehicle body frame 101 via a drive shaft 120 extending to the left and right is transmitted to the front wheels 102F of the traveling device 102 via a reduction gear box 121 and a front axle 102a (corresponding to an axle) supported by the reduction gear box 121, and the reduction gear box 121 is disposed in a state of being inserted into a recessed portion formed on a surface of the front wheels 102F facing the body inner side.

Thus, the front wheels 102F are mounted so as to be rotationally driven around the horizontal transverse axis x2 by the power of the engine 108 being transmitted through the drive shaft 120, and are configured by non-steering wheels formed of tire wheels having a lateral width L1 and a diameter D1 larger than the rear wheels 102R.

The rear wheels 102R are provided on both left and right end sides of a rear wheel support frame 122 attached to the rear portion of the vehicle body frame 101 so as to be swingable about a front-rear direction axis z1, are configured with steering wheels including a rear axle 102b (corresponding to an axle) that can be steered about a vertically swinging axis y1, and are rotatable about a horizontal lateral axis x3 of the rear axle 102 b. The rear wheel 102R is a tire wheel having a lateral width L2 and a diameter D2 set smaller than those of the front wheel 102F.

As shown in fig. 14 to 16 and 20, an intake pipe 181 provided with an air cleaner 180 for sucking and supplying outside air to the engine 108 is attached to the right lateral side portion on the back side of the cabin 103 as a riding part.

An exhaust pipe 182 for discharging exhaust gas from the engine 108 is attached to the right lateral side portion on the back side of the cabin 103 on the same side as the side on which the intake pipe 181 is disposed, and an exhaust port 182a thereof is provided in the vicinity of the ceiling portion of the cabin 103 that is separated upward from the air cleaner 180 of the intake pipe 181.

[ vehicle body frame ]

As shown in fig. 17 to 19, the vehicle body frame 101 includes a main frame 110 formed in a rectangular frame shape in plan view, and the main frame 110 includes a pair of left and right

longitudinal frames

110A, 110A having a cross-sectional shape formed in a groove shape that opens inward and is long in the front-rear direction, a tubular front lateral frame 110B that connects front end sides of the longitudinal frames 110A, and a tubular rear lateral frame 110C that connects rear end sides of the

longitudinal frames

110A, 110A.

Front support frame portions 110A are welded and fixed to the front end sides of the left and right

vertical frames

110A, 110A of the main frame 110, respectively, and the front horizontal frame 110B is provided to connect the front support frame portions 110A to each other.

The left and right

longitudinal frames

110A, 110A extend laterally outward through both left and right end sides of the front transverse frame 110B, and the reduction gear box 121 is bolted to a flange at the outer end thereof. A drive shaft 120 extending from the transmission case 109 is introduced into the reduction gear box 121, and the power of the engine 108 is transmitted from the front axle 102a to the front wheels 102F via the transmission case 109 and the reduction gear box 121.

Rear support frame portions 110b are welded and fixed to rear end sides of the left and right vertical frames 110A, respectively, the rear horizontal frame 110C is provided so as to connect the rear support frame portions 110b to each other, and a rear wheel support frame 122 is attached to a bracket 110C provided at an intermediate position in the left-right direction of the rear horizontal frame 110C so as to be vertically swingable about a front-rear direction axis z 1.

Further, in the left and right front support frames 110a, at a lower position on the rear side apart from the tubular front transverse frame 110B connecting the front end sides thereof, as shown in fig. 17 and 18, a rectangular tubular coupling frame 110D is provided so as to bridge the left and right front support frames 110a so as to pass through the lower side of the transmission case 109 described later, and this coupling frame 110D also functions as a mechanism for protecting the transmission case 109 against an obstacle that may come into contact from below.

A lattice-like mounting frame 111 for mounting the threshing device 104 and the engine 108 is provided above the main frame 110, and a supporting leg 112 for supporting the grain tank 105 and a cabin supporting leg 113 for supporting the cabin 103 are provided upright on the lattice-like mounting frame 111.

The lattice-shaped mounting frame 111 has a lattice shape including

horizontal lattice frames

111a, 111b, and 111c disposed above the

vertical frames

110A and 110A so as to cross the left and right

vertical frames

110A and 110A of the main frame 110, and

vertical lattice frames

111d and 111e located on the same plane as the

horizontal lattice frames

111a, 111b, and 111 c.

As shown in fig. 18, the left vertical lattice frame 111d of the pair of left and right

vertical lattice frames

111d, 111e is positioned along the outer side of the left vertical frame 110A, and the right vertical lattice frame 111e is positioned closer to the right vertical frame 110A between the left and right

vertical frames

110A, 110A.

The left and right

vertical lattice frames

111d and 111e arranged in this way are located below the left and right lateral side edges of the threshing device 104, and are configured to support the threshing device 104 in a stable manner.

The lattice-shaped mounting frame 111 is formed such that right-side end portions of the

horizontal lattice frames

111a, 111b, and 111c protrude laterally outward from the right-side vertical frame 110A, and a mount 111f of the engine 108 is provided on an extension portion of the horizontal lattice frame 111a on the front end side protruding laterally outward and an extension portion of the horizontal lattice frame 111b at an intermediate position.

As a result, as shown by the phantom lines in fig. 18, the engine 108 can be supported in a state in which most of the engine protrudes laterally outward beyond the right vertical frame 110A. In this case, the lateral outer end position of the engine 108 is set at the same position as the lateral outer edge of the front wheel 102F or the lateral outer end of the lattice-like mounting frame 111, or is set slightly inward of the vehicle body, that is, at substantially the same position.

The transverse frame 111a at the front end side of the lattice-like mounting frame 111 is formed in a state in which the left end portion thereof also protrudes laterally outward from the left vertical frame 110A, and a ladder-like mounting table 114 is provided across an extension portion of the transverse frame 111a protruding laterally outward from the vertical frame 110A and a bracket 114a extending leftward laterally outward from the vertical frame 110A.

Support brackets

112a, 112a formed to protrude laterally outward of the right vertical frame 110A are provided on the rear side of the intermediate lateral frame 111b and the extension of the lateral frame 111c on the rear end side protruding laterally outward of the right vertical frame 110A.

The supporting leg portions 112 for supporting the grain tank 105 with the vehicle body frame 101 are configured by the supporting brackets 112a, the supporting legs 112b erected on the upper sides of the supporting brackets 112a, and the receiving frame 112e supported by the supporting legs 112c erected from the brackets 112d on the arc-shaped legs 113d of the cabin supporting leg portions 113, which will be described later. As shown in fig. 20 and 21, the vicinity of the upper end of the supporting leg 112b on the rear end side of the supporting leg 112 is connected and fixed to the side wall 104a of the threshing device 104 via a stay 112 f.

As shown in fig. 19 and 20, the cabin supporting leg portion 113 for supporting the cabin 103 includes a plurality of straight rod-shaped

legs

113a, 113b, and 113c erected on the upper surface sides of the front supporting

frames

110A and 110A provided on the front end sides of the left and right

vertical frames

110A and 110A, and an arc-shaped leg 113d bent in an arc shape toward the upper side of the outer periphery of the front wheel 102F from the outer end portion of the cross frame 111a on the rear side of the outer periphery of the front wheel 102F, and is configured by connecting the straight rod-shaped

legs

113a, 113b, and 113c and the upper end side of the arc-shaped leg 113d by a rectangular base frame 113 e.

The arrangement is such that the front and rear straight rod-

like legs

113a, 113c of the straight rod-

like legs

113a, 113b, 113c are disposed in a forward inclined posture in which they are positioned forward toward the upper end side and the intermediate straight rod-like leg 113b is disposed in an upright posture, and the lower end portion of the front straight rod-like leg 113a and the upper end portion of the rear straight rod-like leg 113c are connected to each other, thereby forming a rigid structure similar to a truss structure as a whole.

The cabin supporting leg portions 113 configured as described above are provided symmetrically on the left and right sides of the front end sides of the left and right vertical frames 110A, and are configured to support the front portion of the cab 103 in a state of protruding forward from the front end of the main frame 110.

[ arrangement Structure ]

The cab 103, the threshing device 104, the grain tank 105, the straw disposal device 106, the engine 108, and the harvesting device 107 are disposed in the following manner with respect to the vehicle body frame 101 configured as described above.

[ cockpit ]

That is, as shown in fig. 14 to 17 and 20, the cab 103 is mounted on the upper side of the cab support leg 113 and is disposed higher than the upper edge of the outer diameter of the front wheel 102F and positioned forward from the rear edge of the front wheel 102F.

As shown in fig. 16 and 17, the center line C in the left-right direction corresponding to the center of the left and right

front wheels

102F and 102F is disposed slightly to the left (right in the paper plane in fig. 17) in the left-right direction.

A steering wheel 130 for steering operation and the like are provided in the cab 103, and the rear wheels 102R are configured to be steered by operation of the steering wheel 130. In addition, reference numeral 132 shown in fig. 17 is a headlight for irradiating the front, and reference numeral 131 is a working lamp provided to mainly irradiate the harvesting work site by the harvesting processing device 107.

[ threshing device ]

As described above, the threshing device 104 is disposed on the lattice-like mounting frame 111 disposed on the main frame 110 of the vehicle body frame 101 in a state where the left and right lateral side edges of the threshing device 104 are along the left and right

vertical lattice frames

111d, 111e, as shown in fig. 18 and 21. Thus, the threshing device 104 is disposed so as to be positioned within the width of the gap between the left and right front wheels 102F and the rear wheels 102R in the left-right direction.

At this time, the front side of the left lateral side edge of the threshing device 104 is extended laterally outward beyond the left vertical frame 110A of the main frame 110, and is disposed in the state of being very close to the inner side end of the front wheel 102F in the left-right direction, and is disposed at the rear side so as to be located inward in the left-right direction than the maximum steering range of the rear wheel 102R.

The threshing device 104 arranged in this way is arranged in a state of being biased to the left side with respect to the center line C in the left-right direction of the vehicle body and the stripping roller rotation axis p1 at the center line in the left-right direction of the entire threshing device 104. That is, the center line of the threshing device 104 in the left-right direction is located at the same position as the forward-backward direction stripping roller rotation axis p1 of the stripping roller 140 disposed inside.

Since the lower surface of the threshing device 104 is mounted on the lattice-like mounting frame 111 as described above, it is positioned slightly lower than the front axle 102a of the front wheel 102F, which is a non-steered wheel, and slightly higher than the rear axle 102b of the rear wheel 102R, which is a steered wheel, as shown in fig. 20 and 21. That is, the height of the front axle 102a of the front wheel 102F as a non-steering wheel or the height of the rear axle 102b of the rear wheel 102R as a steering wheel is substantially the same.

The threshing device 104 itself is a well-known whole stalk throwing type having a stroking drum 140 having a stroking drum rotation axis p1 in the front-rear direction at the upper part of a stroking chamber inside and a sorting part 141 at the lower part. The grain threshing machine is configured to perform threshing treatment on a crop such as straw supplied from the cutting treatment device 107 side into the threshing chamber through the feeder 170 provided at the front, collect grains by the sorting unit 141 and send the grains to the grain tank 105, and send the straw to the straw discharge treatment device 106 at the rear. Reference numeral 143 in fig. 14 is a threshing portion cover which shields the right lateral side portion of the threshing device 104 from the outside of the engine 108, and is configured to be detachable.

Like the stripping roller 140, the feeder 170 is disposed in a state biased to the left with respect to the center line C in the left-right direction of the vehicle body, and as shown in fig. 17, is disposed in a position not overlapping with the transmission case 109 biased to the right with respect to the center line C in the left-right direction of the vehicle body in a plan view.

The straw discharge processing device 106 is integrally attached to the rear part of the threshing device 104, and is configured to cut straw discharged after threshing and discharge the cut straw outside the machine.

[ Engine ]

As shown in fig. 18, the engine 108 is disposed on a mounting base 111f provided on an extension portion of the lattice frame 111a on the front end side of the lattice-like mounting frame 111 that protrudes laterally outward and an extension portion of the lattice frame 111b at an intermediate position. Thus, the engine 108 is located rearward of the right front wheel 102F on the right lateral outer side opposite to the side on which the threshing device 104 is biased, and is located forward of the front support leg 112b of the front and

rear support legs

112b, 112b erected from the

support brackets

112a, 112a formed to project laterally outward of the right vertical frame 110A of the support leg portion 112.

The position of the lateral outer side of the engine 108 is set at a position substantially equal to the lateral outer edge of the front wheel 102F or slightly inward of the vehicle body, that is, at a substantially equal position, as viewed in the front-rear direction.

The position of the outer end of engine 108 in the left-right direction is set to the same position as the lateral outer end of lattice-like mounting frame 111 that is a part of vehicle body frame 101, or to a slightly inward side of the vehicle body, that is, to substantially the same position.

Since the lower surface of the engine 108 is mounted on the grid-like mounting frame 111 as described above, the engine is positioned slightly lower than the front axle 102a of the front wheel 102F, which is a non-steered wheel, and slightly higher than the rear axle 102b of the rear wheel 102R, which is a steered wheel, as shown in fig. 20 and 21. That is, the front axle 102a of the front wheel 102F as a non-steering wheel or the rear axle 102b of the rear wheel 102R as a steering wheel is disposed at substantially the same height.

The upper end of the engine is disposed at a position slightly lower than or at the same height as the upper end of the outer peripheral edge of the front wheel 102F.

The engine 108 is disposed between the front axle 102a and the rear axle 102b and closer to the front axle 102a as viewed from the side. Thus, space s1 corresponding to the longitudinal interval between the front and

rear support legs

112b, 112b is formed on the rear side of the engine 108, and therefore maintenance of the engine 108 can be performed from the rear side by the space s 1.

Further, the laterally outer side of the engine 108 is opened to the outside by removing the trough-removing cover 143, and therefore maintenance from the laterally outer side can be easily performed.

Since upper space s2 is present above engine 108 between bottom 150 of grain tank 105 placed above supporting leg 112, maintenance from above can be performed using upper space s 2.

[ cereal case ]

As shown in fig. 19 to 21, the grain tank 105 is supported by the supporting leg portions 112 so that a right bottom portion 150a of the bottom portion 150 supporting the grain tank 105, which is positioned on the right side of the threshing device 104, extends to the left and right sides of the threshing device 104 in a state of being suspended from a top plate 104b near the left side wall 104a of the threshing device 104, and a portion corresponding to a left bottom portion 150b of the bottom portion 150 of the grain tank 105.

The grain box 105 has a lateral width that is set to be approximately the same as the lateral width of the vehicle body frame 101, and the center position in the lateral direction thereof is approximately aligned with the center line C of the vehicle body. The vertical height dimension is set smaller than the horizontal width dimension, and the uppermost portion of the upper surface of grain tank 105 is configured to be at the same height as the upper surface of the ceiling portion of cockpit 103.

As shown in fig. 20 and 21, the grain tank 105 is configured such that a right bottom portion 150a of the bottom portion 150 supported by the supporting leg portion 112 corresponding to the upper portion of the engine 108 is positioned lower than a left bottom portion 150b positioned at the upper portion of the threshing device 104.

As a result, as shown in fig. 21, the right bottom 150a of the grain box 105 is in the following state: is provided at a height position overlapping with the top plate 104b of the threshing device 104 rising in a trapezoidal shape in side view.

At this time, since the upper portion of the supporting leg portion 112 is set to have a height position overlapping the stripping drum 140 of the threshing device 104 in a side view, the height in the vertical direction of the space portion s1 formed below the receiving frame 112e of the supporting leg portion 112 is also considerably high on the rear side of the engine 108.

Therefore, if the threshing cover 143 is removed, the lateral outside of the side wall 104a of the threshing device 104 is also opened relatively widely, which is convenient also when performing maintenance of the threshing device 104.

[ cutting processing device ]

As shown in fig. 14 to 16, a harvesting device 107 is provided which is vertically moved around a horizontal transverse axis x1 on the front side of the threshing device 104 mounted on the vehicle body frame 101.

The harvesting apparatus 107 includes a feeder 170 for supplying the harvested crops such as stalks to the threshing apparatus 104, and a raking reel 171 and a harvesting apparatus 172 for raking up the planted crops such as stalks, and is configured to harvest the crops, feed the harvested crops to the feeder 170, and supply the harvested crops to the threshing apparatus 104.

The feeder 170 is configured such that the crop feeding direction is along the front-rear direction of the stripping roller rotation axis p1 of the stripping roller 140 in the threshing device 104, and the tucking reel 171 and the cutting device 172 can be moved up and down in accordance with the up-down movement of the feeder 170.

[ other embodiment of embodiment 2]

(1) In the above embodiment, the grain tank 105 disposed above the threshing device 104 is configured in a series of configurations spanning the position above the engine 108 and the position above the threshing device 104, and the right bottom portion 150a corresponding to the position above the engine 108 in the bottom portion 150 of the grain tank 105 is positioned lower than the left bottom portion 150b corresponding to the upper side of the top plate 104b of the threshing device 104, but the present invention is not limited thereto, and the bottom portion 150 may have the same height as shown in fig. 22(a) or (b), for example.

Other configurations may be the same as those of the above embodiment.

(2) In the above embodiment, the structure in which the grain tank 105 disposed above the threshing device 104 is suspended to both the left and right sides of the threshing device 104 is shown, but the structure is not limited to this, and for example, the structure may be such that the structure is suspended from the upper position of the threshing device 104 toward the upper position side of the engine 108 (see fig. 22 b), or the structure is provided only at the upper position of the threshing device 104 (see fig. 22 c), or the structure is provided only at the upper position of the engine 108 (see fig. 22 d), or the structure is not shown, but the structure is configured to be suspended from the upper position of the threshing device 104 toward the opposite side of the upper position of the engine 108. The threshing device 104 may be arranged such that the threshing cylinder rotation axis p1 coincides with or substantially coincides with the center line C in the left-right direction of the vehicle body.

In addition, the imaginary lines in fig. 22(b) to (d) show the portions corresponding to fig. 22(a) where a part of grain box 105 does not exist.

Other configurations may be the same as those of the above embodiment.

(3) In the above embodiment, the traveling device 102 has been described as having the configuration in which the front wheels 102F are drive wheels configured as non-steering wheels and the rear wheels 102R are non-driven steering wheels, but the present invention is not limited to this, and for example, the front wheels 102F may be steering wheels and the rear wheels 102R may be drive wheels configured as non-steering wheels.

Further, both the front wheels 102F and the rear wheels 102R may be configured as steering wheels, and either or both of the front wheels 102F and the rear wheels 102R may be configured as drive wheels.

(4) In the above embodiment, the supporting legs 112 for supporting the grain tank 105 are provided on the upper side of the lattice-like mounting frame 111 on the side opposite to the side on which the thresher 104 is biased, but the present invention is not limited to this, and may be provided on the upper side of the lattice-like mounting frame 111 on the same side as the side on which the thresher 104 is biased, and configured to be supported widely on both the left and right sides of the grain tank 105.

Other configurations may be the same as those of the above embodiment.

(5) In the above embodiment, the engine 108 disposed on the lateral side of the threshing device 104 is disposed between the front wheel 102F and the rear wheel 102R in a side view and at a position overlapping the front wheel 102F in a front-rear direction view, but the present invention is not limited to this configuration, and may be disposed as follows.

For example, the engine 108 may be positioned between the side wall 104a of the threshing device 104 and the inner end surface of the front wheel 102F facing the vehicle body center side in the left-right direction, and the front end of the engine 108 may be arranged at a position in the front-rear direction, which is approximately the same as the front axle 102a, on the front side of the rear end of the front wheel 102F, or at the rear side thereof.

The positional relationship between the threshing device 104 and the engine 108 in the front-rear direction is not limited to the case where both are located at substantially the same position in the front-rear direction, and the front end of the engine 108 may be located at a position spaced rearward from the front wall 104c of the threshing device 104.

(6) In the above embodiment, the upper end of the engine 108 is disposed at a position slightly lower than the upper end of the outer peripheral edge of the front wheel 102F, or at the same height, but the present invention is not limited thereto.

For example, the following may be provided: the main portion of the engine 108 is positioned to the same extent as the upper end of the outer periphery of the front wheel 102F, and the accessories and a small portion of the engine 108 are positioned above the upper end of the front wheel 102F.

The lower surface of the engine 108 is not limited to being disposed at substantially the same height as the front axle 102a, and may be disposed such that, for example, the lower surface of the engine 108 is positioned lower than the front axle 102a or the crank shaft of the engine 108 is positioned lower than the front axle 102 a.

(7) The combine harvester of the present invention is not limited to harvesting grains such as rice, wheat, and corn, but may be applied to harvesting flowers such as beans and rapeseed of soybean.

[ embodiment 3]

Hereinafter, embodiment 3 will be described with reference to the drawings.

[ integral structure of combine harvester ]

Fig. 23 to 28 show left and right side surfaces and an entire plane of a general combine harvester according to the present invention. Fig. 23 shows a right side surface, fig. 25 shows a left side surface, and fig. 27 shows a plane surface. Fig. 24 shows a right side surface with an exterior cover 209 and a radiator 270 described later removed, fig. 26 shows a left side surface with the exterior cover 209 and a fuel tank 208 described later removed, and fig. 28 shows a plane with the grain tank 205 and the delivery unit 310 described later removed. Fig. 29 shows the entire front surface of a general combine harvester.

As shown in these figures, a conventional combine according to the present invention includes a traveling device 202 including a pair of left and right

front wheels

202F and 202F (corresponding to a front traveling section) and a pair of left and right

rear wheels

202R and 202R (corresponding to a rear traveling section) on the lower side of a vehicle body frame 201.

The body frame 201 has a cabin 215 at the front, a threshing device 204 and a grain tank 205 at the rear, a straw discharge processing device 216 at the rearmost, and a harvesting processing device 217 at the front that moves up and down around a horizontal cross-axis x1 with respect to the body frame 201, thereby constituting a self-propelled body.

An engine 207 for transmitting a driving force to the traveling device 202, the threshing device 204, the harvesting device 217, and the like is disposed on the right lateral side of the threshing device 204 with a crankshaft (not shown) extending in the left-right direction of the machine body.

The power transmitted from the transmission 203 attached to the front portion of the vehicle body frame 201 to the front wheels 202F of the traveling device 202 via the drive shaft 220 (corresponding to the 1 st output shaft described later) extending from the left and right is transmitted to the front wheels 202F via a reduction gear box 221 and a front axle 202a (corresponding to an axle) supported by the reduction gear box 221, and the reduction gear box 221 is disposed in a state of entering a recessed portion formed on a surface of the front wheels 202F facing the body inner side.

Thus, the front wheels 202F are mounted so as to be rotationally driven around the horizontal transverse axis x2 by the power of the engine 207 being transmitted through the drive shaft 220, and are configured by non-steering wheels formed of tire wheels having a width L1 and a diameter D1 in the left-right direction that are larger than those of the rear wheels 202R.

The rear wheels 202R are provided on both left and right end sides of a rear wheel support frame 222 attached to the rear portion of the vehicle body frame 201 so as to be swingable about a front-rear direction axis z1, are configured with steering wheels including a rear axle 202b (corresponding to an axle) that can be steered about a vertically swinging axis y1, and are rotatable about a horizontal lateral axis x3 of the rear axle 202 b. The rear wheel 202R is constituted by a tire wheel having a lateral width L2 and a diameter D2 set smaller than the front wheel 202F.

As shown in fig. 23 and 24, an intake pipe 277 including an air cleaner 276 for sucking and supplying outside air to the engine 207 is attached to the right lateral side of the rear side of the cabin 215 as the boarding area.

An exhaust pipe 278 for discharging exhaust gas from the engine 207 is attached to the right lateral side portion on the back side of the cabin 215 on the same side as the side on which the intake pipe 277 is disposed, and the exhaust port 278a is provided in the vicinity of the ceiling portion of the cabin 215 that is separated upward from the air cleaner 276 of the intake pipe 277.

[ vehicle body frame ]

As shown in fig. 29 to 31, the vehicle body frame 201 includes a main frame 210 formed in a rectangular frame shape in plan view, the main frame 210 including a pair of left and right

longitudinal frames

210A, 210A having a cross-sectional shape of a groove shape that opens inward and is long in the front-rear direction, a tubular front lateral frame 210B that connects front end sides of the longitudinal frames 210A, and a tubular rear lateral frame 210C that connects rear end sides of the

longitudinal frames

210A, 210A.

Although not shown, the pair of left and right

vertical frames

210A, 210A that are long in the front-rear direction are provided with hydraulic pipes, fuel pipes, electric wires, and the like along the front-rear direction in the internal space of the groove-shaped cross section.

Front support frame portions 210A are welded and fixed to the front end sides of the left and right

vertical frames

210A, 210A of the main frame 210, respectively, and the front horizontal frame 210B is provided to connect the front support frame portions 210A to each other.

The left and right

longitudinal frames

210A, 210A extend laterally outward through both left and right end sides of the front lateral frame 210B, and the reduction case 221 is bolted to a flange at the outer end thereof. A drive shaft 220 extending from the transmission 203 is introduced into the reduction gearbox 221, and the power of the engine 207 is transmitted from the front axle 202a to the front wheels 202F via the transmission 203 and the reduction gearbox 221.

Rear support frame portions 210b are welded and fixed to rear end sides of the left and right vertical frames 210A, respectively, and the rear transverse frame 210C is provided so as to connect the rear support frame portions 210b to each other, and a rear wheel support frame 222 is attached to a bracket 210C provided at an intermediate position in the left-right direction of the rear transverse frame 210C so as to be vertically swingable about a front-rear direction axis z 1.

Further, in the left and right front support frames 210a, at a lower position on the rear side apart from the tubular front transverse frame 210B connecting the front end sides thereof, a rectangular tubular coupling frame 210D is provided as shown in fig. 26 and 27 so as to pass through the lower side of the transmission 203 described later to couple the left and right front support frames 210a to each other, and this coupling frame 210D also functions as a mechanism for protecting the transmission 203 against an obstacle that may come into contact from below.

A lattice-like mounting frame 211 for mounting the threshing device 204 and the engine 207 is provided on the upper side of the main frame 210, and a supporting leg 212 for supporting the grain tank 205 and a cabin supporting leg 213 for supporting the cabin 215 are provided upright on the lattice-like mounting frame 211. Further, a ladder-shaped tank mounting table 214 for mounting the fuel tank 208 is provided on the lateral outer side of the left vertical frame 210A of the left and right

vertical frames

210A and 210A.

The box mounting table 214 is formed in a ladder shape in plan view by a pair of

longitudinal support members

214b and 214b that are bridged across two front and rear extension brackets 214a (corresponding to wrist braces) extending laterally outward from the lateral outer surface of the left-side longitudinal frame 210A, and a connecting member 214c that is connected in the left-right direction at a plurality of front and rear portions of the pair of

longitudinal support members

214b and 214 b.

The lattice-shaped mounting frame 211 includes

horizontal lattice frames

211a, 211b, and 211c disposed above the

vertical frames

210A and 210A so as to cross the left and right

vertical frames

210A and 210A of the main frame 210, and

vertical lattice frames

211d and 211e located on the same plane as the

horizontal lattice frames

211a, 211b, and 211c, and is configured in a lattice shape.

As shown in fig. 30, the left vertical lattice frame 211d of the pair of left and right

vertical lattice frames

211d, 211e is positioned along the outer side of the left vertical frame 210A, and the right vertical lattice frame 211e is positioned on the near side from the right vertical frame 210A between the left and right

vertical frames

210A, 210A.

The left and right

vertical lattice frames

211d and 211e arranged in this way are located below the left and right lateral side edges of the threshing device 204, and are configured to be able to support the threshing device 204 in a stable manner.

The lattice-shaped mounting frame 211 is formed such that right end portions of the

horizontal lattice frames

211a, 211b, and 211c protrude laterally outward from the right vertical frame 210A, and a mount 211f of the engine 207 is provided on an extension portion of the horizontal lattice frame 211a on the front end side protruding laterally outward and an extension portion of the horizontal lattice frame 211b at an intermediate position.

As a result, as shown by the phantom lines in fig. 30, the engine 207 can be supported in a state in which most of the engine protrudes laterally outward beyond the right vertical frame 210A. In this case, the lateral outer end position of the engine 207 is set at the same position as the lateral outer edge of the front wheel 202F or the lateral outer end of the lattice-like mounting frame 211, or is set slightly inward of the body, that is, at substantially the same position.

The horizontal lattice frame 211a on the front end side of the lattice-shaped mounting frame 211 is formed in a state in which the left end portion thereof also protrudes laterally outward from the left vertical frame 210A. As shown in fig. 30 and 31, the extension portion of the cross frame 211a projecting laterally outward from the vertical frame 210A and the bracket 214a extending leftward laterally outward from the vertical frame 210A are joined in a vertically overlapped state, and the left end portion of the cross frame 211a and the left end portion of the bracket 214a are welded and joined to the lower end portion of the left arc leg 213d of the cabin supporting leg 213, which will be described later, to support the left end portion of the cabin supporting leg 213.

The right end of the front-end side cross frame 211a is also welded and joined to the lower end of the right arc leg 213d of the trunk support leg 213 to support the right end of the trunk support leg 213.

Support brackets

212a, 212a formed to protrude laterally outward of the right vertical frame 210A are provided on the extension of the lateral frame 211c on the rear end side protruding laterally outward from the right vertical frame 210A and on the rear side of the lateral frame 211b at the intermediate position.

The supporting leg portions 212 for supporting the grain tank 205 with the vehicle body frame 201 are configured by the supporting brackets 212a, the supporting legs 212b erected on the upper sides of the supporting brackets 212a, and the receiving frame 212e supported by the supporting legs 212c erected from the brackets 212d erected on the arc-shaped legs 213d of the cabin supporting leg portions 213, which will be described later. The rear end of the supporting leg 212 is connected and fixed to the lateral side wall 204a of the threshing device 204 via a stay (not shown) near the upper end of the supporting leg 212 b.

As shown in fig. 28, 30, and 31, the cabin supporting leg portion 213 for supporting the cabin 215 includes a plurality of straight rod-shaped

legs

213a, 213b, and 213c erected on the upper surfaces of the front supporting

frame portions

210A and 210A provided on the front end sides of the left and right

vertical frames

210A and 210A, and an arc-shaped leg 213d curved in an arc shape toward the upper side of the outer periphery of the front wheel 202F from the outer end portion of the cross frame 211a on the rear side of the outer periphery of the front wheel 202F. The upper end sides of the straight rod-shaped

legs

213a, 213b, and 213c and the arc-shaped leg 213d are connected by a rectangular pedestal frame 213 e.

Among the straight bar-shaped

legs

213a, 213b, and 213c, the front and rear straight bar-shaped

legs

213a and 213c are arranged in a forward inclined posture so as to be located forward toward the upper end side, and the middle straight bar-shaped leg 213b is arranged in an upright posture so as to connect the lower end portion of the front straight bar-shaped leg 213a and the upper end portion of the rear straight bar-shaped leg 213c, whereby the entire structure is a rigid structure similar to a truss structure.

The cabin supporting leg portions 213 configured as described above are provided symmetrically on the left and right sides of the front end sides of the left and right vertical frames 210A, and are configured to support the front portion of the cab 215 in a state of protruding forward from the front end of the main frame 210.

The vehicle body frame 201 configured as described above is provided with a cabin 215, a harvesting device 217, a threshing device 204, a grain tank 205, an engine 207, a transmission 203, a fuel tank 208, and the like as follows.

[ cockpit ]

That is, as shown in fig. 23 to 29, the cab 215 is mounted on the upper side of the cab leg portion 213, is disposed at a position higher than the upper edge of the outer diameter of the front wheel 202F, and is positioned forward from the rear edge of the front wheel 202F.

Further, as shown in fig. 27 and 28, the left-right direction is slightly to the left (right side of the paper surface in front view of fig. 29) of the center line C of the body in the left-right direction corresponding to the center of the left and right

front wheels

202F, 202F.

A steering wheel 215a for steering operation or the like is provided in the cab 215, and the rear wheels 202R are configured to be steered by operation of the steering wheel 215 a.

Although not shown, various operating tools and instruments for steering and working operations are provided in the cab 215, and a parking brake pedal and a gear shift operating tool, which will be described later, are also disposed.

In addition, reference numeral 215b shown in fig. 29 is a working lamp provided to irradiate the harvesting work site by the harvesting processing device 217 from the upper part of the cabin 215. Reference numeral 215c is a headlight provided to irradiate the front from the lower portion of the cabin 215.

[ cutting processing device ]

As shown in fig. 23 to 28, a harvesting processing device 217 is provided which is vertically moved around a horizontal transverse axis x1 on the front side of the threshing device 204 mounted on the vehicle body frame 201.

The harvesting apparatus 217 includes a feeder 217A for supplying the harvested crops such as stalks to the threshing apparatus 204, a tucking reel 217B for tucking the tips of the planted crops such as stalks, a harvesting apparatus 217C for cutting the roots, and a horizontal feed auger 217D for gathering the harvested crops at the center in the cutting width direction, and is configured to harvest the crops, feed the harvested crops to the feeder 217A, and supply the harvested crops to the threshing apparatus 204.

Although not shown, the feeder 217A is configured such that an endless belt-shaped conveyor that rotates in the front-rear direction is provided inside a square tubular box, and the fed crop is conveyed upward and rearward. The crop conveying direction by the feeder 217A is the front-rear direction along the stripping roller rotation axis p1 of the stripping roller 240 in the threshing device 204, and the raking reel 217B, the cutting device 217C, and the lateral conveying auger 217D are configured to be capable of being lifted up and down in accordance with the lifting operation of the feeder 217A.

Feeder 217A is disposed in a state biased to the left side same as the side biased by threshing device 204 with respect to center line C in the left-right direction of the machine body, and as shown in fig. 28, a space s3 wider than the width between the left side edge of feeder 217A and the left front wheel 202F is formed between the right side edge of feeder 217A and the inner surface of right front wheel 202F.

The wide space s3 is surrounded by the right side edge of feeder 217A and the inner surface of right front wheel 202F, and front cutting processing device 217 and rear transmission case 230, and is set to a size enough to allow a worker to enter space s3 and perform maintenance work on transmission 203, feeder 217A, cutting processing device 217, and the like. At this time, if feeder 217A is moved upward, a space is formed also below feeder 217A, and the feeder 217A can be submerged below the feeder 217A, so that the work can be performed more easily.

[ threshing device ]

As described above, the threshing device 204 is disposed on the lattice-like mounting frame 211 disposed on the main frame 210 of the vehicle body frame 201 in a state where the left and right lateral side edges of the threshing device 204 are along the left and right

vertical lattice frames

211d, 211e, as shown in fig. 28 and 30. Thus, the threshing device 204 is disposed so as to be positioned within the width of the gap between the left and right front wheels 202F and the rear wheels 202R in the left-right direction.

At this time, the front side of the left lateral side edge of the threshing device 204 is extended laterally outward beyond the left vertical frame 210A of the main frame 210, and is disposed in the state of being very close to the inner side end portion of the front wheel 202F in the left-right direction, and is disposed at the rear side so as to be located at the inner side in the left-right direction than the maximum steering range of the rear wheel 202R (the right maximum steering position and the left maximum steering position of the rear wheel 202R are indicated by imaginary lines in fig. 30).

The threshing device 204 arranged in this way is arranged in a state in which the stripping roller rotation axis p1 at the center line in the left-right direction of the entire threshing device 204 is biased to the left side with respect to the center line C in the left-right direction of the machine body. That is, the center line of the threshing device 204 in the left-right direction is located at the same position as the forward-backward direction stripping roller rotation axis p1 of the stripping roller 240 arranged inside.

Since the lower surface of the threshing device 204 is mounted on the lattice-like mounting frame 211 as described above, it is positioned slightly lower than the front axle 202a of the front wheel 202F, which is a non-steered wheel, and slightly higher than the rear axle 202b of the rear wheel 202R, which is a steered wheel, as shown in fig. 23 to 26. That is, the height of the front axle 202a of the front wheel 202F as a non-steering wheel or the height of the rear axle 202b of the rear wheel 202R as a steering wheel is substantially the same.

The threshing device 204 itself is a well-known whole stalk throwing type having a stroking roller 240 having a stroking roller rotation axis p1 in the front-rear direction in an upper stroking chamber 204A and a wind turbine 245 and a swing sorting mechanism 246 in a lower sorting chamber 204B. The grain threshing machine is configured to perform threshing processing on crops such as grain stalks supplied from the harvesting processing device 217 side into the threshing chamber 204A through the feeder 217A provided at the front, sort the processed objects to be sorted in the sorting chamber 204B, feed grains into the grain tank 205, and feed stalks into the stalk discharge processing device 216 provided at the rear in a connected manner.

As shown in fig. 32, the sorting chamber 204B is provided with a swing sorting mechanism 246, and a wind turbine 245 for supplying sorting air to the processed object in the sorting process by the swing sorting mechanism 246 is provided in front of and below the swing sorting mechanism 246, and the swing sorting mechanism 246 supplies a crop such as grains or straw chips leaking from the receiving net 241 covering the lower part of the stripping roller 240 as the processed object to be sorted.

Below the swing sorting mechanism 246, a first recovery portion 247 for recovering as a first material the singulated grains that have leaked from the front side of the swing sorting mechanism 246 is provided on the front side, and a second recovery portion 248 for recovering as a second material the branched grains or two grains that have leaked from the rear side of the swing sorting mechanism 246 is provided on the rear side.

The first collecting part 247 is provided with a first screw 247a for conveying the collected first material toward the winnowing device 310 to be fed to the grain tank 205, and arranged in a left-right direction so as to convey the first material toward the right lateral side of the inlet of the winnowing device 310 existing on the right side of the threshing device 204.

The second collecting unit 248 is configured such that a second screw 248a for conveying the collected second material to a second feeding-back device 249 provided at the right end of the threshing device 204 is arranged in a left-right direction, and the collected second material is raised and fed back to the swing sorting mechanism 246.

The power from the engine 207 is supplied to the threshing device 204 via the 1 st belt transmission mechanism 300 (corresponding to a belt transmission mechanism). The 1 st belt drive mechanism 300 is provided along the left lateral side wall 204a of the threshing device 204 as shown in fig. 38, and is provided so that the lateral outside is shielded by the fuel tank 208 as shown in fig. 38. Although not described in detail, the power transmitted from the engine 207 is transmitted to the devices (the wind turbine 245, the first screw 247a, the second screw 248a, the eccentric cam type swing sorting mechanism 246, and the like) of the sorting chamber 204B through the 1 st belt transmission mechanism 300.

As with the stripping roller 240, the feeder 217A is disposed in a state biased to the left with respect to the center line C in the left-right direction of the machine body, and is disposed in a position partially overlapping the transmission 203 biased to the right with respect to the center line C in the left-right direction of the machine body in a plan view, as shown in fig. 30.

The straw discharge processing device 216 is integrally attached to the rear part of the threshing device 204, and is configured to cut straw discharged after threshing and discharge the cut straw outside the machine.

As shown in fig. 34, the threshing device 204 includes a frame 242 whose outer contour edge is formed in a substantially rectangular parallelepiped shape long in the machine body front-rear direction, and the frame 242 is fixed to the vehicle body frame 201, and side plates 243 are attached to the frame 242 in the front, rear, left, and right directions to constitute the left and right lateral side walls 204a, the front wall 204c, and the rear wall (not shown). A top plate 204b is provided on the upper portion of the frame 242, the lower surface side of the frame 242 is covered with a bottom plate (not shown), and the entire threshing device 204 is formed in a rectangular box shape.

The top plate 204b is attached to an upper portion of the frame 242 so as to be swingable around a swing axis z5 in the front-rear direction, and an opening and a cover plate, not shown, are attached to a bottom plate covering a lower surface of the frame 242, so that the inside of the threshing apparatus 204 can be inspected by removing the cover plate.

As shown in fig. 32, the threshing device 204 configured as described above has an upper part constituting a threshing chamber 204A in which the threshing cylinder 240 is built, and a lower part constituting a sorting chamber 204B in which the wind turbine 245 and the swing sorting mechanism 246 are built.

Further, in a portion of the left lateral wall 204A corresponding to the middle position between the stripping chamber 204A and the sorting chamber 204B, a front-rear direction middle bar member 242B is provided so as to be stretched across the frame 242 at both front and rear ends thereof, and a side plate 243 located between the middle bar member 242B and the upper frame 242a of the frame 242 is detachably attached as shown in fig. 33 to 35. That is, the frame 242, the intermediate bar members 242b, and the side plates 243 form the left lateral side wall 204a (the right side of the paper surface in the drawings of fig. 34 and 35).

As shown in fig. 33, the detachable side plate 243 includes a front side plate 243a and a rear side plate 243b that are divided into two in the front-rear direction of the machine body, and each of the side plates is formed in a substantially rectangular shape that is long in the front-rear direction of the machine body when viewed from the side. The front plate 243a and the rear plate 243b are formed in the same size and shape, and have a compatible structure so that the front and rear positions can be used interchangeably.

Further, the front side plate 243a and the rear side plate 243b are integrally formed with outer circumferential ribs 243c protruding laterally outward from the wall surface of the lateral wall 204a at their respective peripheries, and have improved shape retention strength, and fixing pins 243d extending downward in a state where the outer circumferential ribs 243c are inserted are welded and fixed to both front and rear portions of the lower outer circumferential rib 243 c.

The fixing pins 243d are members for engaging with engagement holes (not shown) formed on the upper surface side of the mullion member 242b having a groove-shaped cross section, and positioning the horizontal positions of the front plate 243a and the rear plate 243 b.

Through holes (not shown) penetrating the front plate 243a and the rear plate 243b in a direction perpendicular to the plate surface are formed in both front and rear portions of the upper portions of the front plate 243a and the rear plate 243 b. The through hole is used to insert a fastening bolt 244a as the fixing means 244, and is provided corresponding to a female screw portion 244b as the fixing means 244 provided in a fastening bracket 242c provided below the upper frame 242 a. Therefore, the front plate 243a and the rear plate 243b can be fixed to the frame 242 by screwing the coupling bolt 244a inserted into the through hole into the female screw portion 244b, and the fixing of the front plate 243a and the rear plate 243b to the frame 242 can be released by releasing the screwing of the coupling bolt 244a to the female screw portion 244 b.

The front plate 243a and the rear plate 243b are attached and detached for inspection of the inside of the stripping chamber 204A, replacement of the receiving net 241, and maintenance.

As shown in fig. 34 and 35, the receiving net 241 is formed in a partial arc shape along the outer periphery of the lower half side of the stroking cylinder 240 as viewed in the front-rear direction along the core (stroking cylinder rotation axis) p1 of the stroking cylinder input shaft 240 a.

The receiving net 241 is divided into a left receiving net 241L and a right receiving net 241R in the left-right direction of the machine body, and is also divided into four parts in the front-rear direction of the machine body by the left receiving net 241L and the right receiving net 241R.

The receiving net 241 is supported by the front-rear mounting frame 242d existing at the intermediate position between the left receiving net 241L and the right receiving net 241R by coupling the right end (the left end in the drawings of fig. 34 and 35) of the left receiving net 241L and the left end (the right end in the drawings of fig. 34 and 35) of the right receiving net 241R to the front-rear mounting frame 242d via the coupling bolts 241 a.

The left end (the right end in the drawings of fig. 34 and 35) of the left receiving net 241L is detachably screwed to the lower end of the left fixing plate 242L integrally attached to the upper frame 242a by a fixing bolt 241c, and the right end (the left end in the drawings of fig. 34 and 35) of the right receiving net 241R is fixed by a pin by engaging a locking pin 241b into the lower end of the right fixing plate 242R integrally attached to the upper frame 242 a.

Therefore, when maintenance and inspection such as replacement of the receiving net 241 is required, as shown in fig. 35, the left receiving net 241L and the right receiving net 241R can be taken out of the stripping chamber 204A by loosening the connecting bolts 244A, detaching the front plate 243a and the rear plate 243b from the frame 242, and loosening the connecting bolts 241a and the fixing bolts 241c inside the stripping chamber 204A.

Further, the side plate 243 other than the side plate 243 on the left lateral side of the stripping chamber 204A, that is, the side plate 243 on the left lateral side of the sorting chamber 204B, the stripping chamber 204A, and the side plate 243 on the right lateral side of the sorting chamber 204B are respectively fixedly connected to the frame 242, and there is no structure for easy attachment and detachment at the time of maintenance and inspection.

Reference numeral 204e shown in fig. 33 and 34 is an operation handle for fixing and releasing the end of the top plate 204b opposite to the side where the swing axis z5 exists to and from the frame 242, and is provided at a plurality of positions in the front-rear direction along the longitudinal direction of the upper frame 242a on the left side of the frame 242 (on the right side in the drawings of fig. 34 and 35).

[ Engine ]

As shown in fig. 28 to 30, 36, and 39, the engine 207 is disposed on an extension portion of the lattice frame 211a on the front end side of the lattice-shaped mounting frame 211 that protrudes laterally outward and an attachment seat 211f provided on an extension portion of the lattice frame 211b at an intermediate position. Thus, the engine 207 is located on the right lateral outer side opposite to the side on which the threshing device 204 is biased, on the rear side of the right front wheel 202F, and on the front side of the front support leg 212b, among the front and

rear support legs

212b, 212b erected from the

support brackets

212a, 212a formed to project laterally outward of the right vertical frame 210A of the support leg portion 212.

The position of the lateral outer side of the engine 207 is set at a position substantially equal to the lateral outer edge of the front wheel 202F or slightly inward of the body, that is, at a substantially equal position, as viewed in the front-rear direction.

The position of the outer end of the engine 207 in the left-right direction is set to the same position as the lateral outer end of the lattice-shaped mounting frame 211 which is a part of the vehicle body frame 201, or to a position slightly inside the vehicle body, that is, to substantially the same position.

Since the lower surface of the engine 207 is mounted on the lattice-like mounting frame 211 as described above, the engine is positioned slightly lower than the front axle 202a of the front wheel 202F, which is a non-steered wheel, and slightly higher than the rear axle 202b of the rear wheel 202R, which is a steered wheel, as shown in fig. 29 and 30. That is, the height of the front axle 202a of the front wheel 202F as a non-steering wheel or the height of the rear axle 202b of the rear wheel 202R as a steering wheel is substantially the same.

The upper end of the engine is disposed at a position slightly lower than or at the same height as the upper end of the outer peripheral edge of the front wheel 202F.

Further, the engine 207 is located between the front axle 202a and the rear axle 202b in side view, and is disposed closer to the front axle 202a in the front-rear direction. Thus, as shown in fig. 30, space s1 corresponding to the front-rear spacing of front and

rear support legs

212b, 212b is formed on the rear side of engine 207, so that maintenance of engine 207 can be performed from the rear side by space s 1. That is, the space s1 can be used as a working space.

Further, the laterally outer side of the engine 207 is opened to the outside by removing the exterior cover 209, so that maintenance work from the laterally outer side is also facilitated.

Further, since upper space s2 is present above engine 207 and between bottom 205a of grain tank 205 placed above supporting leg 212, maintenance from above can be performed using upper space s 2.

[ radiator ]

A radiator 270 for engine cooling is disposed on the rear side of the engine 207.

As shown in fig. 23 and 30, radiator 270 is located at a rear side of the body of engine 207, and is disposed in a state of being overlapped with engine 207 in the left-right direction in front view. Specifically, the right side of the body (corresponding to the left side of the body in front view) on the rear side of the threshing device 204 is a portion lower than the grain tank 205 in the vertical direction, but is provided at a relatively high position on the vehicle body frame 201.

That is, as shown in fig. 30, 31, and 36, the front portion of the radiator 270 is coupled and fixed to and supported by a plurality of upper and lower portions of the 4 support legs 212b erected from the vehicle body frame 201, the support legs 212b being located on the rear side of the machine body and on the lateral outer side of the machine body. The rear portion of the heat sink 270 is supported by a curved support member 219 extending so as to be curved upward and outward from the rear end of the right vertical frame 210A.

The heat sink 270 includes a suction-type cooling fan 271 that rotates around an axis in the lateral direction of the machine body, and is configured such that the heat sink main body 272 is cooled by cooling air sucked by the cooling fan 271, and a dust removing filter 273 for removing dust contained in the air is provided at a portion of the lateral outer surface side of the heat sink main body 272 where the cooling air is sucked.

The dust removing filter 273 is provided rotatably around the same axial center as the rotating shaft center of the cooling fan 271, and an intake duct 274 for sucking dust adhering to the surface of the dust removing filter 273 by the suction force of the cooling fan 271 and discharging the dust to the outside from an unillustrated exhaust portion is provided on the side surface on the outside of the machine body.

With this configuration, even in a use environment where a lot of fine dust is present in the air, clogging of the dust removing filter 273 of the heat sink 270 can be avoided easily.

The radiator 270 is disposed at a distance in the front-rear direction from the engine 207, is provided on the rear side of the rear support leg 212b out of the front and rear support legs 212b, and is configured to form a space s1 as a working space for maintenance between the engine 207 and the radiator 270, and to secure the space s1 on the front side of the radiator 270.

A transmission mechanism 275 for supplying power of the engine 207 to the radiator 270 is provided so as to bypass above the space s 1.

That is, as shown in fig. 36, an output pulley 207d for output is attached to an output shaft 207a of the engine 207. The 1 st transmission belt 275a is wound around the 1 st output pulley 207d and the 1 st relay pulley 207e attached to the 1 st relay shaft 207b provided on the upper front side of the space s 1.

Power is transmitted from the 1 st relay shaft 207b to the 2 nd relay shaft 207c provided in the rear upper portion of the space s1 via the 2 nd transmission belt 275b wound around the 1 st relay pulley 207e and the 2 nd relay pulley 207f attached to the 2 nd relay shaft 207 c.

The rotational power is transmitted from the 2 nd relay pulley 207f of the 2 nd relay shaft 207c to the dust removing filter 273 having a pulley portion with a large diameter on the outer peripheral portion thereof via the 3 rd speed reduction belt 275c, and the dust removing filter 273 is configured to rotate at a speed lower than the rotation speed of the cooling fan 271. Further, the rotational power is transmitted from the 2 nd relay shaft 207c to the drive shaft 271a of the cooling fan 271 via the 4 th speed increasing belt 275d, and the cooling fan 271 is configured to rotate at a high speed.

In this configuration, the power of the engine 207 is supplied to the radiator 270 by the transmission mechanism 275 including the 1 st to 4

th transmission belts

275a, 275b, 275c, and 275d, and the transmission mechanism 275 is disposed along the bottom surface of the grain tank 205 toward the rear side above the engine 207 so as to bypass the space s1 for work.

[ Fuel tank ]

Next, a support structure of the fuel tank 208 will be described.

As shown in fig. 28, 30, 31, 37 and 38, a tank main body 280 as a container for storing fuel of the fuel tank 208 is integrally connected to a side-view triangular protection frame 281 surrounding a rear portion thereof and a rear lower half of the left and right lateral side surfaces 280 a. The fuel tank 208 having the protective frame 281 is disposed on the left outside of the machine body with respect to the 1 st belt transmission mechanism 300 disposed along the left lateral wall 204a of the threshing device 204.

The fuel tank 208 is formed in a large size so that its front-rear width is substantially the same as the front-rear width of the threshing device 204, and has a vertical width corresponding to the vertical height of the sorting chamber 204B of the threshing device 204, and is configured so that the outside of the 1 st belt actuator 300 is covered on the outside of the left side of the sorting chamber 204B in a state where the outside of the left side of the stripping chamber 204A is opened. The fuel tank 208 is formed to have a vertical width larger than a lateral width, and is formed in a vertically long shape as viewed in the front-rear direction of the machine body.

The fuel tank 208 is configured such that the tank main body 280 is mounted on the ladder-shaped tank mounting base 214 extending laterally outward on the left side of the left vertical frame 210A together with the protective frame 281, and is configured to swing about the vertical swing axis y2 so as to be freely changeable between a fixed position (posture shown by an imaginary line in fig. 37 and 38) where the longitudinal direction is along the machine body front-rear direction and the lateral side surface 280A thereof is along the left lateral side wall 204a of the threshing device 204, and an open position (posture shown by a solid line in fig. 37 and 38) where the lateral side surface 280A is swung to move away from the lateral side wall 204a of the threshing device 204.

In a state where the fuel tank 208 is at the fixed position, the fuel tank 208 covers the outside of the 1 st belt transmission mechanism 300 on the outside of the left side of the sorting chamber 204B, and if the fuel tank 208 is operated to the open position, maintenance of the 1 st belt transmission mechanism 300 and various devices present on the lateral side wall 204a of the threshing device 204 can be easily performed in a large space.

longitudinal support members

214b and 214b coupled to a pair of front and rear extension brackets 214a (corresponding to wrist braces) extending laterally outward from the lateral outer surface of the left-side longitudinal frame 210A, and a coupling member 214c extending in the left-right direction at a plurality of front and rear portions of the pair of

longitudinal support members

214b and 214 b.

As shown in fig. 37, the upper surface of the box mounting table 214 is provided at a position lower than the upper surface of the vertical frame 210A by a predetermined amount, with respect to the upper surfaces of the front and rear two-part extension brackets 214a and the connecting members 214c extending laterally outward from the lateral outer surface of the left vertical frame 210A of the vehicle body frame 201. Thus, the upper surface of the box mounting table 214 is set to be lower than the upper surfaces of the vertical frame 210A and the lattice-shaped mounting frame 211, and the lower surface thereof is set to be equal to or higher than the lower surface of the vertical frame 210A.

The vertical swing axis y2 is configured by fixedly providing

support shafts

214e and 214e having the same vertical axis as the vertical axis, which protrude upward, in the vicinity of the laterally outward protruding end of the protruding bracket 214a on the rear side of the box mounting table 214 and the vicinity of the laterally outward protruding end of a support arm 214d (corresponding to a support arm) protruding laterally outward from the rear end of the left lateral wall 204a of the threshing device 204.

In the

support shafts

214e and 214e having the same vertical axis center, a pair of vertical

pivot support brackets

282 and 282 provided at the rear end portion of the protective frame 281 are formed with pivot support holes into which the

support shafts

214e and 214e are fitted, and the fuel tank 208 supported swingably about a vertical swing axis center y2 is mounted on the tank mounting table 214 by fitting the pivot support holes of the

pivot support brackets

282 and 282 into the

support shafts

214e and 214e from above.

The bottom surface of the fuel tank 208 is supported by the connecting members 214c, and the connecting member 214c on the rear end side closer to the pivot axis y2 among the plurality of connecting members 214c is provided in a state inclined in the circumferential direction around the pivot axis y 2. By configuring to be supported by the plurality of connecting members 214c in this way, the sliding resistance when the fuel tank 208 rotates about the pivot axis y2 can be reduced as much as possible.

Pivot

support brackets

282, 282 having pivot support holes for engaging with the swing axis y2 are provided at the rear end side and lateral outer side end portions of the protective frame 281. Therefore, as shown in fig. 38, when the fuel tank 208 is moved to the open position, the fuel tank 208 can be opened widely so that the entire fuel tank 208 is located outside the swing axis y 2.

As shown in fig. 31 and 37, a locking tool 281A of a resilient engagement type is provided at a lower portion of a middle portion in the front-rear direction of the protection frame 281 of the fuel tank 208, and the locking tool 281A is configured to hold the fuel tank 208 at a fixed position in a state where the fuel tank 208 is swung to the fixed position. The lock tool 281A is configured to be engaged with a locking hole 214f provided in the tank table 214 by the biasing force of a spring, and to prevent the fuel tank 208 from moving outward. The fuel tank 208 can be switched to the outward open position by manually lifting the lock tool 281A against the biasing force of the spring to release the locking.

Since the tank mounting table 214 is provided at a position lower by a predetermined amount with respect to the main frame 210 including the pair of left and right vertical frames 210A, the fuel tank 208 is at a low position, and therefore, the operation of lowering the position of the fuel tank 208 and supplying fuel from the fuel supply port 284 provided at the upper portion of the fuel tank 208 is facilitated while having a vertical height such that a predetermined storage amount is achieved.

Since the tank table 214 is provided between the left front wheel 202F and the left rear wheel 202R, the fuel tank 208 is disposed in a space located in the middle of the front-rear direction between the left front wheel 202F and the left rear wheel 202R.

[ outer cover ]

Next, the exterior cover 209 will be explained.

As shown in fig. 23 and 25, the exterior cover 209, which is separated from the lateral side walls 204a on both left and right sides of the threshing device 204 and covers the lateral sides, is provided in a state of extending long in the vertical direction so as to cover substantially the entire width of the threshing device 204 in the vertical width direction. That is, the exterior cover 209 is provided in a vertically long state so as to cover a lateral portion outside the stripping chamber 204A and a lateral portion outside the sorting chamber 204B of the thresher 204. The exterior cover 209 is provided to extend in the front-rear direction over the entire width of the threshing device 204 in the front-rear direction of the machine body, and the exterior covers 209 on the left and right sides are configured to be swingable about upper swing fulcrums z2 and z3 in the front-rear direction of the machine body, respectively.

Hereinafter, the supporting structure of the exterior cover 209 on both the left and right sides will be described in detail.

As shown in fig. 37 and 39, the right-side exterior cover 209R of the left and right-side exterior covers 209 is provided so as to be positioned on the right outside of the engine 207 and the radiator 270, and is configured to be swingable about a swing fulcrum z2 that is oriented in the front-rear direction of the upper housing.

That is, as shown in fig. 39, a bracket 290d attached to the exterior cover 209R is pivotally supported and coupled to a support portion 291 fixedly provided at two front and rear portions of the right outer portion of the support leg 212 provided for placing and supporting the grain tank 205 thereon, so as to be swingable about a swing fulcrum z2 along the front and rear directions of the machine body.

As shown in fig. 37, the left-side exterior cover 209L of the left-and-right-side exterior covers 209 is provided so as to be positioned outside the fuel tank 208 on the left side, and is configured to be swingable about a swing fulcrum z3 oriented in the front-rear direction of the upper housing. That is, a support arm 204d is fixedly extended toward the left outside from a left lateral side wall 204a of the threshing device 204, and a bracket 290d attached to the exterior cover 209L is pivotally supported and coupled to a support bracket provided at a distal end portion of the support arm 204d so as to be swingable about a swing fulcrum z 3. Support arm 204d is provided at two positions spaced apart in the front-rear direction. Therefore, the exterior cover 209L is supported swingably at two positions spaced forward and backward from the support arm 204 d.

As shown in fig. 23 and 24, the exterior cover 209 on both left and right sides is formed with a front wheel cutout 296 for avoiding contact with the front wheel 202F and a rear wheel cutout 297 for avoiding contact with the rear wheel 202R.

The front wheel notch 296 is formed in an arc shape so as to extend along the outer peripheral portion of the front wheel 202F in a state close to the outer peripheral portion of the front wheel 202F.

Since the crop is transferred between the harvesting device 217 and the threshing device 204 on the front side of the self-propelled machine body and the driving mechanism such as the engine 207 and the transmission 203 is further provided, the portion opened outward is reduced, and the front wheel notch 296 is formed in a small shape so as to be as close to the outer periphery of the front wheel as possible in order to avoid the intrusion of other objects from the outside and the scattering of dust generated from the crop transfer portion outward.

On the other hand, the rear wheel notch 297 is largely notched so as to open the rear lower side of the lateral side portion of the bicycle body. On the rear side of the self-propelled machine body, there is no need to reduce the number of portions that are open to the outside as on the front side, and the exterior cover 209 is formed in a shape that is largely cut out, thereby achieving a reduction in size and weight of the entire exterior cover 209.

As shown in fig. 24, the left side of the bicycle body is configured such that the lateral side of the threshing device 204 opened through the rear wheel notch 297 is covered with the fuel tank 208 provided between the exterior cover 209 and the threshing device 204. With this configuration, the 1 st belt transmission 300 is not exposed to the outside, and it is easy to avoid a trouble such as damage to the 1 st belt transmission 300 due to the intrusion of another object from the outside.

Further, the radiator 270 is configured to suck air for cooling the engine from the outside through the rear wheel cutout 297 on the right side of the bicycle body. That is, the rear wheel cutout 297 also serves as an opening through which the radiator 270 can be sucked.

As shown in fig. 23, 25, 37, and 39, hand grips 298 for opening and closing are provided on the lower portions of the left and right exterior covers 209(209R, 209L), respectively, and the operator can manually operate the hand grips 298 to swing the exterior covers 209 about the upper swing fulcrums (z2, z3) to open and close the exterior covers.

The exterior covers 209R and 209L on the left and right sides are provided with holding tools 299 which are respectively switchable between a holding state in which the holding tools are held in a position in a closed state and a release state in which the opening operation is permitted. The holding tool 299 is configured to be able to hold a position in a state where the exterior cover 209 is closed by being locked to a locking tool 295 provided at a fixed portion of the bicycle body, and to be able to switch to a state where an opening operation of the exterior cover 209 is permitted by releasing the locking with the locking tool 295.

The body-side locking tool 295 corresponding to the left exterior cover 209L is mounted on the fuel tank 208 as an example of a fixing portion. That is, as shown in fig. 25 and 37, the inclined member 281a of the protective frame 281 formed of an angle member is fixed to the side surface of the fuel tank 208 in an inclined state. Further, a locking tool 295 is provided in a middle portion of the slope 281a via a bracket 281 b.

As shown in fig. 39, the body-side locking tool 295 corresponding to the right exterior cover 209R is attached to a fixing member 294 fixedly extending from the support leg 212b as an example of a fixing portion.

The exterior cover 209(209R, 209L) on both the left and right sides is provided with a position holding mechanism 290 that is switchable between a position holding state in which the exterior cover 209 is switched to an open posture along the substantially horizontal direction and a holding release state in which the position holding is released and the switching to a closed posture in which the exterior cover 209 is allowed to be in the substantially vertical posture.

The left and right position holding mechanisms 290 are configured to allow the exterior cover 209 to be switched to the closed state by bending a pair of

link members

290a and 290b, which are connected to each other so as to be bendable by the intermediate pivotal support portion 290c, in a predetermined direction, and to hold the exterior cover 209 in a predetermined open position by restricting bending in a direction opposite to the predetermined direction in a posture in which the pair of

link members

290a and 290b are connected to each other in a substantially linear shape.

To explain this, in the position holding mechanism 290 corresponding to the left exterior cover 209L, as shown in fig. 37, one of both side ends of the pair of

link members

290a and 290b is coupled to the middle portion of the left exterior cover 209L, and the other is pivotally supported and coupled to a coupling portion 292 provided on the left lateral wall 204a of the threshing device 204.

Since the fuel tank 208 is located below the pair of

link members

290a and 290b, the pair of

link members

290a and 290b are provided so as to be bendable upward via the intermediate pivot support portion 290c, and are configured to restrict bending downward in a posture in which the pair of

link members

290a and 290b are connected to each other in a substantially linear shape. That is, one link member 290a formed of a groove member is formed to extend toward the other side beyond the pivotally supporting portion 290c as the pivotally supporting coupling portion, and the extended portion is configured to abut against the link member 290b on the other side to restrict downward bending.

In the position holding mechanism 290 corresponding to the right exterior cover 209R, one of both side ends of the pair of

link members

290a and 290b is coupled to a middle portion of the left exterior cover 209R, and the other is pivotally coupled to a coupling portion 293 provided at a vertical middle portion of the support leg 212 b. Further, similarly to the left position holding mechanism 290, the pivot support portion 290c, which is a pivot support coupling portion of one link member 290a made of a groove material, is formed to extend toward the other side so as to be bent to be restricted, but as shown in fig. 39, since the transmission mechanism 275 to the heat sink 270 is provided on the upper side, the pivot support portion 290c in the middle is configured to be bendable downward.

With such a configuration, for example, when fuel is supplied to the fuel tank 208 or when cleaning or maintenance work is performed in the stripping chamber 204A, work can be performed by changing the posture of the left outer cover 209L to a predetermined open posture. When the maintenance work of the sorting chamber 204B is performed, the work is performed in a state where the fuel tank 208 is also switched to the outward projecting position.

In the case of performing maintenance work on radiator 270 or engine 207, work can be performed by entering space s1, which is a work space for maintenance, in a state where the posture of right exterior cover 209R is changed to the predetermined open posture.

[ cereal case ]

As shown in fig. 40 to 43, grain tank 205 is mounted with a box-shaped tank body 251 on the upper side of a tank frame 250 formed by assembling various steel materials such as square pipes, and these tank frames 250 and tank body 251 are integrally connected to each other and supported swingably around a transverse axis z4 in the front-rear direction of a support shaft portion 250A provided at the upper end portion of support leg portion 212.

The box main body 251 is configured by a bottom plate 252, front, rear, right and left vertical plates 253, a top plate 254, and the like, and includes a left extending portion 251L extending to the left outside of the threshing device 204, and a right extending portion 251R extending to the right outside of the threshing device 204 and positioned above the engine 207 and the like, and extends in a state of overhanging to both the left and right sides of the threshing device 204, and is formed to have a wide width across the left and right front wheels 202F, similarly to the cabin 215.

As shown in fig. 43, the tank frame 250 and the bottom plate 252 of the tank main body 251 are configured such that the bottom portion 252a on the left half side is positioned above the threshing device 204 and the bottom portion 252b on the right half side is positioned lower than the upper end portion of the threshing device 204. Thus, the bottom 252b on the right half side of the grain tank 205 is provided at a height position overlapping the top plate 204b raised in a trapezoidal shape of the threshing device 204 in a side view, as shown in fig. 41 to 43.

At this time, since the upper portion of the supporting leg portion 212 is set to a height position so as to overlap the threshing cylinder 240 of the threshing device 204 in a side view, the height in the vertical direction of the space portion s1 formed below the receiving frame 212e of the supporting leg portion 212 is also high on the rear side of the engine 207.

Therefore, if the exterior cover 209 is operated in the open posture, the lateral outer side of the lateral side wall 204a of the threshing device 204 is also opened relatively widely, which is also convenient when performing maintenance of the threshing device 204.

The box frame 250 includes a spindle portion 250A protruding forward or rearward at a right lower end portion of both front and rear end portions thereof, and a pair of front and rear leg portions 250B extending downward at a left side portion of a bottom portion thereof.

Each of the spindle portions 250A is relatively rotatably fitted into a pair of front and rear pivot support portions 255, the pair of front and rear pivot support portions 255 being provided at the upper right end portion of the support leg portion 212 erected at a right side portion of the threshing device 204 of the vehicle body frame 201, and the axis of the spindle portion 250A becomes a transverse axis z4 in the front-rear direction which is a swing axis of the box frame 250. That is, the grain box 205 can be swung in the left-right direction with the front and rear spindle portions 250A as the fulcrum.

A hydraulic damping cylinder 256 is provided across the box frame 250 and the support leg 212, and the grain box 205 is configured to be driven to swing in the left-right direction around a grain storage position for storing grains close to the upper part of the threshing device 204 and a grain discharge position for discharging grains separated from the upper part of the threshing device 204 and inclined in the right direction, with the front and rear spindle portions 250A as fulcrums.

The respective legs 250B of the box frame 250 are configured to abut against the left end of the top plate 204B of the threshing device 204 by contraction operation of the damping cylinders 256 at their lower ends, and thereby hold the grain box 205 at the storage position.

In the right end of grain box 205, right vertical plate 253 is formed in a state where the lower side thereof is positioned on the right outer side of the machine body than the upper side thereof. The right end of the grain box 205 includes: a grain discharge port 253a formed between the right end of the bottom plate 252 and the lower end of the right vertical plate 253 in a state in which grains can be discharged from the lower portion thereof; a plurality of opening/closing plates 253b suspended and connected to the lower end of the right vertical plate 253 so as to be swingable in the left-right direction, for opening/closing the grain outlet 253a in a state having a function of changing the front-rear width of the grain outlet 253 a; and a lid plate 257 that swings up and down, with a connecting shaft 257a to the tank frame 250 as a fulcrum, in an upright posture along the lower side of the right vertical plate 253 and in a posture lying down to the right and outward.

The cover 257 is configured to block the grain discharge port 253a by preventing the outward rightward swinging of the opening and closing plates 253b in the standing posture thereof, and to allow the outward rightward swinging of the opening and closing plates 253b in the falling posture thereof, thereby opening the grain discharge port 253 a.

A pair of front and rear waist-bent links 258 for guiding grains to flow downward to the right outside of the machine body are provided so as to extend over the front and rear

vertical plates

253, 253 and the cover plate 257. A lock lever 259 including a pair of front and rear engaging arms 259a that engage with the pivot support shafts 257b of the corresponding waist bending links 258 on the cover plate 257 side to fixedly hold the cover plate 257 in the closed position is provided swingably in the left and right directions at the upper right end portions of the front and rear

vertical plates

253, 253.

According to the above configuration, by operating the lock lever 259 to swing, the fixing and holding of the cover 257 at the closed position is released, operating the cover 257 to swing from the closed position to the open position, and operating the damping cylinder 256 to extend to swing and drive the grain box 205 from the storage position to the discharge position, the grain box 205 can be switched from the storage state in which grains are stored therein to the tilted state in which the grains are tilted in the right direction and the stored grains inside are discharged from the grain discharge port 253a to the outside right of the machine body. Further, the lid 257 is swung from the open position to the closed position, the locking lever 259 is swung to fixedly hold the lid 257 at the closed position, and the damping cylinder 256 is contracted to swing the grain box 205 from the discharge position to the storage position, whereby the grain box 205 can be switched from the tilted state to the storage state.

Further, by switching the grain tank 205 to the tilted state, the movable top plate 204b provided on the upper portion of the thresher 204 can be operated to swing to the open position, and maintenance from above can be performed on the stripping drum 240 and the like provided on the upper portion of the thresher 204.

The top plate 254 of the grain tank 205 is formed to have the following portions: a horizontal portion 254A located above the upper end edge of the rear vertical plate 253 and the upper end edges of the left and right

vertical plates

253, 253; a rear inclined portion 254B inclined from a rear end edge of the horizontal portion 254A facing an upper end edge of the rear vertical plate 253 toward the upper end edge of the rear vertical plate 253; and left and right

inclined portions

254C, 254D inclined from left and right side end edges of the horizontal portion 254A facing upper end edges of the left and right

vertical plates

253, 253 toward upper end edges of the corresponding left and right

vertical plates

253, 253.

A supply port 205A of the grain box 205, through which grains can be supplied into the grain box 205, is formed in a corner portion of the upper end of the grain box 205, which is formed by the front vertical plate 253 and the left vertical plate 253. Specifically, the supply port 205A is formed in a left end portion of the upper end portion of the front vertical plate 253 in an inclined posture in which it descends along the left inclined portion 254C of the top plate 254.

The width of the grain tank 205 in the left-right direction is set to be approximately the same as the width of the vehicle body frame 201 in the left-right direction, and the center position in the left-right direction substantially coincides with the center line C of the machine body. The height dimension of grain box 205 in the vertical direction is set smaller than the width in the horizontal direction, and the uppermost portion of the upper surface of grain box 205 is configured to be as high as the upper surface of the ceiling portion of cockpit 215.

[ Pumping device ]

As shown in fig. 32 and fig. 40 to 42, a lifting device 310 for conveying the grain that has been separated by the stripping process and the sorting process in the thresher 204 to the grain tank 205 is provided across the end of the screw 247a, which is the grain discharge portion of the thresher 204, to the supply port 205A of the grain tank 205.

The hoisting device 310 includes: a lower conveying mechanism 310A extending from a distal end portion of the first screw 247a to a forward and upward tilting posture on a right outer side of the threshing device 204; an upper conveying mechanism 310B extending from a conveying terminal end portion of the lower conveying mechanism 310A in a left tilting posture toward the upper left on the front outer side of the grain bin 205; the grain box 205 is configured to bypass the right protruding portion 251R on the grain discharging side.

The lower conveying mechanism 310A is constituted by a slat conveyor that has an endless rotating chain 311a rotationally driven with a plurality of conveying plates provided on the periphery thereof and conveys grain by raking up the grain, inside a conveyor casing 311 communicatively connected to the tip end of the first screw 247 a.

The lower conveying mechanism 310A includes a grain guide 311B for guiding the grain fed downward toward the conveying start end of the upper conveying mechanism 310B. The grain guide 311b is configured to prevent grains from leaking out by using a duct.

The upper conveying mechanism 310B is constituted by a screw conveyor that raises grains conveyed by the lower conveying mechanism 310A toward the supply port 205A of the grain tank 205 by rotating a screw shaft 312a rotatably mounted across the upper and lower end portions thereof inside a conveying cylinder 312 communicatively connected to the grain guide portion 311B.

The upper conveying mechanism 310B is provided at its conveying end with a throwing device 313 for throwing and supplying the grain from the supply port 205A of the grain tank 205 into the grain tank 205.

The slinger 313 includes a pair of slingers 313a that radially slings the grain carried by the grain by centrifugal force by rotating the grain integrally with the screw shaft 312a, and a slinger box 313b that covers the slinger 313a and is fitted to the upper end of the transport cylinder 312 in a rotatable state around the rotation center of the screw shaft 312 a. The throwing box 313b is provided with a guide portion 313c for guiding the grain thrown by the throwing plate 313a into the grain box 205.

The lower conveying mechanism 310A is provided below the right protruding portion 251R of the grain tank 205 so as to be located between the right side surface of the threshing device 204 and the engine 207 in a state of passing through a space formed between the right side surface of the threshing device 204 and the engine 207. Further, the device is provided so as to be along the right side surface of the threshing device 204 in a state of being along a direction orthogonal to the projecting direction of the right projecting portion 251R. Thus, the lower conveying mechanism 310A can be installed in a state close to the right side surface of the threshing device 204, and the portion of the vehicle body frame 201 that is located outside the lower conveying mechanism 310A on the right can be used more effectively as an area where the engine 207 and the peripheral devices of the engine 207 are disposed, and the like, without waste.

Further, the grain guide portion 311b provided at the transport terminal portion is provided in a forward inclined position in a state of being positioned on the front side of the body with respect to the front end of the right extension portion 251R of the grain box 205 in a plan view, and in a state of being positioned above the threshing device 204. This makes it easy to expand the grain tank 205 so that the right half portion thereof is positioned below the upper end portion of the threshing device 204, and the grain guide 311B can be easily connected to the upper conveying mechanism 310B disposed in the front outer side of the grain tank 205, and the conveying efficiency of the grains in the lower conveying mechanism 310A can be improved as compared with the case where the grain tank is installed in a vertical posture. Further, the screw conveyance by the upper conveying mechanism 310B is shortened, and the damage of grains that may occur during the screw conveyance is suppressed.

The upper conveying mechanism 310B is installed in a state of being along the front surface of the grain tank 205 in a left-inclined posture from the conveying tip end portion of the lower conveying mechanism 310A located on the right outer side of the threshing device 204 toward the supply port 205A located on the left upper end portion of the grain tank 205, by using a space formed between the front surface of the grain tank 205 and the back surface of the cockpit 215. Thereby, the cab 215 can be used as a support frame of the upper conveyor 310B. As a result, the grain box 205 can be switched between the storage state and the tilted state by the swing operation in the left-right direction, and the structure required for the support structure for fixedly mounting the upper transport mechanism 310B in a state close to the front surface of the grain box 205 so as to enable the grain inside the grain box 205 to be thrown and supplied from the slinger 313 of the upper transport mechanism 310B can be simplified.

The lower end of the upper conveying mechanism 310B is located at substantially the same height as the upper end of the threshing device 204. This can reduce the height difference between the lower end of the upper conveyance mechanism 310B and the supply port 205A, and accordingly can make the conveyance inclination angle of the upper conveyance mechanism 310B gentle. As a result, the grain conveying efficiency in the upper conveying mechanism 310B can be improved.

[ Transmission ]

The transmission 203 to which the power of the engine 207 is transmitted is attached to the front portion of the vehicle body frame 201, and as shown in fig. 45 and 46, a hydrostatic continuously variable transmission 203A, a planetary gear reduction unit 203B using a planetary gear mechanism, a gear transmission 203C, a differential unit 203D, and the like are combined.

In each of these

devices

203A, 203B, 203C, and 203D, the planetary gear reduction device 203B, the gear transmission device 203C, and the differential device 203D are disposed inside the transmission case 230, and the hydrostatic continuously variable transmission device 203A (see fig. 29 to 30) is attached to a left lateral surface 230a (right side in the paper of fig. 46) outside the transmission case 230. The transmission 203 is configured by incorporating the

devices

203A, 203B, 203C, and 203D as transmission devices into the transmission case 230.

As shown in fig. 29 and 30, the transmission case 230 is fixedly coupled to be placed on the upper side of a rectangular pipe-shaped coupling frame 210D, and the coupling frame 210D couples left and right front support frame portions 210a provided on the front portion of the main frame 210 to each other.

The transmission case 230 is formed in a box shape that can be divided left and right with a vertical dividing surface D corresponding to a joint between the open ends of the left and right split cases as a boundary.

In the joined box-like state, the bottom surface 230e in the horizontal direction has laterally oriented

lateral side surfaces

230a and 230b on both right and left sides thereof in the vertical direction, and front and rear sides thereof have vertically oriented front and rear side surfaces 230d and 230f, respectively, and an upper surface 230c is provided on the upper side thereof, and a part of the rear end side of the upper surface 230c is horizontal, and the front side thereof is formed as an inclined surface inclined so as to descend forward toward the front end side.

This makes up a transmission case 230 that is substantially rectangular in plan view and is formed into a box shape that is substantially triangular in side view as shown in fig. 45.

As shown in fig. 29 and 30, the gear box 230 is disposed so as to partially overlap the feeder 217A of the cutting processing device 217 in a plan view.

In the case of the above-described configuration of transmission 230, in the state where feeder 217A is lowered to the lowermost end position, as shown in fig. 23, the inclined portion of upper surface 230c of transmission 230 is formed at an inclination angle substantially equal to the inclination of the lower surface of feeder 217A lowered to the lower limit position so that the lower surface of feeder 217A does not contact transmission 230.

In the transmission case 230, as shown in fig. 45, an input shaft 231 whose axial direction is along the left-right direction is arranged at a position near a rear end portion, which is one end portion side in the front-rear direction, on an upper portion side of the transmission case 230. On the lower side of the transmission case 230, a drive shaft 220 (corresponding to the 1 st output shaft) having an axial direction along the left-right direction is disposed at a position near the front end portion corresponding to the other end portion side opposite to the one end portion.

The

propeller shafts

234 and 235 in the power transmission system from the input shaft 231 to the drive shaft 220 are disposed below an imaginary line segment a connecting the shaft core (the stripping roller rotation axis) p1 of the input shaft 231 and the shaft core p2 of the drive shaft 220, and along the vertical direction in the vicinity of the one end portion of the transmission case 230 and the horizontal direction in the vicinity of the bottom surface 230e of the transmission case 230.

That is, as shown in fig. 45, a speed change transmission shaft 234 is disposed in the vicinity of a position directly below the input shaft 231, a branch transmission shaft 235 is disposed at a height position approximately equal to the shaft center p2 of the drive shaft 220, and the

transmission shafts

234 and 235 of the power transmission system are disposed such that an imaginary line segment connecting the input shaft 231, the speed change transmission shaft 234, the branch transmission shaft 235, and the drive shaft 220 is formed into a substantially L shape along the rear side surface 230f and the bottom surface 230e of the transmission case 230 in a side view.

An input pulley 231a is fixed to a right end portion (left side in the drawing sheet of fig. 46) of the input shaft 231, and is configured to transmit a driving force from the engine 207 via a transmission belt 283.

The left end (right side in the drawing of fig. 46) of the input shaft 231 is connected to and integrally rotates with a pump shaft 232a of a hydraulic pump 232 of the hydrostatic continuously variable transmission 203A fixed to a left lateral side surface 230a of the transmission 230, and is configured to transmit engine power as a driving force of the hydraulic pump 232.

A motor shaft 233A of a hydraulic motor 233 of the hydrostatic continuously variable transmission 203A is coaxially and rotatably connected to a transmission shaft 234 extending across the left and right

lateral surfaces

230a and 230b in the transmission case 230.

The motor shaft 233a and the speed change transmission shaft 234 constitute an input shaft and an output shaft of the planetary gear reduction unit 203B, a sun gear 233B of the planetary gear reduction unit 203B is attached so as to rotate integrally with the motor shaft 233a, and a carrier 234a for supporting a planetary gear 234B that meshes with an outer peripheral side of the sun gear 233B is attached so as to rotate integrally with the speed change transmission shaft 234.

The planetary gear 234b rotatably supported by the planetary carrier 234a is attached so as to revolve around the outer peripheral side of the sun gear 233b, and a ring gear 231d meshing with the outer peripheral side thereof is provided. The ring gear 231d meshes with both the transmission gear 231c of the input shaft 231 and the planetary gear 234b inside and outside, and transmits the rotation of the input shaft 231 through the transmission gear 231c provided on the input shaft 231.

The sun gear 233B, the carrier 234a, the planet gear 234B, and the ring gear 231d constitute the planetary gear reduction unit 203B, and the power of the motor shaft 233a and the input shaft 231 is input to the planetary gear reduction unit 203B, and the transmission power is output to the transmission shaft 234 via the carrier 234 a.

The transmission shaft 234 is formed of a spline shaft having a spline groove formed in an outer peripheral portion thereof, and is configured to spline-engage a shift gear 234c that is slidable in an axial direction thereof to integrally rotate.

The shift gear 234C constitutes a gear transmission 203C that selectively meshes with the gears 235a, 235b, and 235C provided on the branch transmission shaft 235 to perform a high-low shift operation, together with the gears 235a, 235b, and 235C for shifting.

That is, the shift gear 234c is integrally formed with three kinds of shift gear portions, i.e., a middle speed gear portion g1, a high speed gear portion g2, and a low speed gear portion g3, and is configured to mesh with the middle speed gear 235a, the high speed gear 235b, and the low speed gear 235c provided on the branch transmission shaft 235 individually.

The branch transmission shaft 235 is also mounted across the left and right

lateral surfaces

230a, 230b in the transmission case 230. The branch transmission shaft 235 is integrally provided with a 1 st transmission gear 235D of a non-steering system that meshes with the differential gear 236 of the differential device 203D that transmits power to the front wheels 202F, and a 2 nd transmission gear 235e of a steering system that meshes with the transmission gear 238a of the relay transmission shaft 238 that transmits power to the rear wheels 202R, in addition to the intermediate gear 235a, the high gear 235b, and the low gear 235c (see fig. 45 and 46).

The driving force of the non-steering system input to the differential gear 236 is transmitted to the left and right drive shafts 220 and 220 (corresponding to the 1 st output shaft) via the differential device 203D, and the left and

right drive shafts

220 and 220 are transmitted to the speed reduction mechanism 221a in the reduction gear box 221 of the left and right front wheels 202F. In the reduction gear box 221, the power reduced by the reduction mechanism 221a formed of a planetary gear mechanism is transmitted to the front axle 202a to drive the front wheels 202F.

The left and

right drive shafts

220, 220 include side brakes 220a each having a plurality of friction plates on the outer peripheral side thereof, and are configured such that the right or left side brake 220a is operated in response to a single left or right operation of a side brake pedal, not shown.

The differential device 203D includes a differential lock mechanism 237 that is capable of switching between a differential lock state and a differential lock release state, and is configured to perform an operation of switching between the differential lock state and the differential lock release state in conjunction with a step-in operation of a differential lock pedal, not shown, provided in the cab 215 and a step-in release operation associated with a step-in again.

As shown in fig. 46, the driving force of the steering system input to the relay drive shaft 238 is transmitted to a bevel gear 239a of a rear wheel drive shaft 239 (corresponding to the 2 nd output shaft) having an axis orthogonal to the axis of the relay drive shaft 238 and directed rearward via a bevel gear 238b provided on the relay drive shaft 238.

The driving force of the power branched from the branch transmission shaft 235 to the steering system is transmitted to the rear wheels 202R via the rear axle 202b via the drive transmission shaft 224 connected to the shaft end of the rear wheel drive shaft 239.

A gear pump 225 for supplying pressure oil to various hydraulic actuators is attached to a lateral surface 230a of the transmission 230 on the side where the hydrostatic continuously variable transmission 203A is provided, on the upper side of an imaginary line segment a connecting a shaft core (stripping roller rotation axis) p1 of the input shaft 231 and a shaft core p2 of the drive shaft 220, and on the side closer to the input shaft 231 than the drive shaft 220 in the front-rear direction.

The driving force is input to the gear pump 225 by transmitting power from the branch gear 231b provided in the middle of the input shaft 231 to the input gear 225b provided at the shaft end of the pump drive shaft 225a of the gear pump 225, and driving the gear pump with the power of the input shaft 231.

As shown in fig. 45, the gear pump 225 is configured to suck oil stored in the transmission case 230 through a strainer 226a provided in the vicinity of a bottom surface 230e of the transmission case 230 and through an oil supply passage 226 connected to the strainer 226 a. The oil stored in the transmission case 230 is stored until the liquid level h reaches a height position where the branch transmission shaft 235 and the drive shaft 220 are present, so that the oil can be used as lubricating oil for each gear and the like in the transmission case 230.

The gear pump 225 is used for driving a power steering device 260 for steering the rear wheels 202R as the steering wheels, a harvesting lifting/lowering cylinder 227 for lifting and lowering the entire harvesting processing device 217, a reel lifting/lowering cylinder (not shown) for lifting and lowering the tucking reel 217B of the harvesting processing device 217, and a damping cylinder 256 for lifting and lowering the grain tank 205, and these power steering device 260, harvesting lifting/lowering cylinder 227, reel lifting/lowering cylinder, and damping cylinder 256 constitute an actuator driven by the gear pump 225.

A parking brake 218 including a plurality of friction plates and a pressing member is mounted on a portion of the branch transmission shaft 235 protruding outward from the right lateral side of the transmission case 230.

Although not shown, the parking brake 218 is configured such that the pressing member presses the friction plate to be in a braking state in which the rotation of the branch transmission shaft 235 is prevented by depression of a parking brake pedal provided in the cab 215, and such that the pressing member is released from pressing the friction plate by release of depression of the parking brake pedal.

Reference numeral 230g shown in fig. 45 denotes a hook member that can be used when the transmission case 230 is suspended, and is configured to be threadably attached to an attachment seat 230h provided on the upper surface 230c of the transmission case 230. By providing an engaging portion (not shown) for the hook member 230g at the lower portion of the feeder 217A, the transmission case 230 can be suspended and supported at the time of assembly and disassembly by the operating force of the cutting and raising cylinder 227 in accordance with the vertical and lowering operation of the feeder 217A.

[ rear wheel drive System ]

As shown in fig. 36, a drive transmission shaft 224 (corresponding to a drive transmission means) connected to the rear wheel drive shaft 239 for transmitting a drive force to the rear wheels 202R is disposed on the lower side of the lower edge of the vehicle body frame 201 on which the threshing device 204 is mounted, that is, on the upper side of the lower edge of the vertical frame 210A of the main frame 210, and on the lower side of the lower surface of the threshing device 204, that is, on the lower side of the upper edge of the lattice-like mounting frame 211 in the vertical direction.

As shown in fig. 30, the threshing device 204 is disposed slightly to the right along the right lateral side edge thereof in a plan view.

Thus, when the lower surface side of the threshing device 204 is opened and maintenance work is performed, the drive transmission shaft 224 can be prevented from interfering with the work. Further, since the drive transmission shaft 224 is not present below the lower edge of the vehicle body frame 201, contact with other objects is easily avoided, and a space is not required above the vehicle body frame 201, and therefore, the drive transmission shaft does not become an obstacle to equipment disposed on the vehicle body frame 201.

The power transmission structure from the rear wheel drive shaft 239 to the rear axle 202b is configured as follows.

That is, as shown in fig. 30 and 46, the drive transmission shaft 224 is concentrically coupled to an extension line of the rear wheel drive shaft 239 via a shaft joint 224 a.

The power transmitted to the drive transmission shaft 224 is transmitted to a front-end side bevel gear 267a of a front-rear facing propeller shaft 267 via a bevel gear 224b provided at the rear end of the drive transmission shaft 224 and a transverse propeller shaft 266 having

bevel gears

266a and 266b on the upstream and downstream sides of the propeller shaft.

The front-rear direction propeller shaft 267 is rotatably supported by the vehicle body frame 201 so as to be positioned coaxially with the front-rear direction axis z1 of the rear wheel support frame 222, and a rear end side bevel gear 267b provided on the rear end side thereof is positioned inside the rear wheel support frame 222.

The rear wheel support frame 222 is formed in a box shape having a rectangular cross section, and is internally provided with a rear wheel drive shaft 268. An input bevel gear 268a provided at an intermediate portion of the rear propeller shaft 268 is engaged with a rear side bevel gear 267b of the front-rear propeller shaft 267, and output gears 268b, 268b provided at both left and right ends of the rear propeller shaft 268 are engaged with a transmission gear 269a of a coupling shaft 269 coupled to each of the left and right rear axles 202b via a universal joint 269b, thereby transmitting a driving force to the rear wheels 202R.

[ rear wheel operating mechanism ]

The rear wheel operating mechanism 206 for variably operating the rear wheel 202R constituting the steering wheel around the vertical swing axis y1 is configured as shown in fig. 30 and 46.

That is, a pivot support tube 222a for pivotally supporting the rear axle 202b (corresponding to the axle) about the vertically swingable axis y1 is integrally welded to both left and right end portions of the rear wheel support frame 222 attached to the rear portion of the vehicle body frame 201 so as to be swingable about the front-rear direction axis z 1.

In the left and right rear wheels 202R steered around the vertical swing axis y1 as a swing center, the steering rocker arm 262, which is oriented inward in the front direction during straight travel, is coupled to the full-hydraulic power steering device 260 via the link 261.

The power steering apparatus 260 is configured to input detection information detected by a steering operation amount detector (not shown) that detects a steering operation amount of the steering wheel 215a to a control apparatus (not shown) configured by a microcomputer, and to extend and contract a piston rod 260b of the power steering apparatus 260 based on a command of a steering operation mechanism (not shown) stored in advance as a program in a nonvolatile memory of the control apparatus, thereby changing a steering direction.

The cylinder 260a of the power steering device 260 is fixedly supported by the rear wheel support frame 222 that swings left and right about the front-rear direction axis z1, and is configured to swing left and right about the front-rear direction axis z1 together with the rear wheel support frame 222.

[ Transmission form of traveling System ]

The power transmission system from the engine 207 to the running device 202 is configured as shown in fig. 46.

The output from the engine 207 is input to the input shaft 231 of the transmission 203 via a transmission belt 283 and an input pulley 231 a.

The power transmitted to the input shaft 231 is transmitted to the hydraulic pump 232 of the hydrostatic continuously variable transmission 203A via a pump shaft 232a that is connected concentrically with the input shaft 231 and is connected so as to rotate integrally therewith. The power is branched and transmitted to the gear pump 225 via a branch gear 231B provided on the input shaft 231 and to a ring gear 231d of the planetary gear reduction unit 203B via a transmission gear 231 c.

The power transmitted to the hydrostatic continuously variable transmission 203A is subjected to a shift operation, is output from the motor shaft 233A of the hydraulic motor 233, and is input to the sun gear 233B of the planetary gear reduction unit 203B. Therefore, the carrier 234a of the planetary gear reduction device 203B transmits the resultant force of the powers input from both the hydraulic motor 233 side and the input shaft 231 side, and the resultant force is transmitted as the power after the gear shift to the speed change transmission shaft 234 via the carrier 234 a.

The hydrostatic continuously variable transmission 203A and the planetary gear reduction unit 203B constitute a main transmission of a traveling drive system, and the main transmission is configured to be capable of continuously performing a shifting operation from a forward highest speed position to a reverse position by a forward-backward swinging operation of a main transmission lever (not shown) provided in the cab 215.

The power transmitted to transmission shaft 234 is transmitted to branch transmission shaft 235 via shift gear 234c and each of the transmission gears (intermediate gear 235a, high gear 235b, and low gear 235c) of branch transmission shaft 235. The three kinds of shift gear portions of the intermediate speed gear portion g1, the high speed gear portion g2 and the low speed gear portion g3 of the shift gear 234c and the intermediate speed gear 235a, the high speed gear 235b and the low speed gear 235c of the branch propeller shaft 235 constitute a sub-transmission device that is operated by a sub-transmission lever, not shown, provided in the cab 215.

The position where the middle speed gear portion g1 of the shift gear 234c meshes with the middle speed gear 235a of the branch transmission shaft 235 is the middle speed output state of the sub-transmission device, the position where the high speed gear portion g2 of the shift gear 234c meshes with the high speed gear 235b of the branch transmission shaft 235 is the high speed output state of the sub-transmission device, and the position where the low speed gear portion g3 of the shift gear 234c meshes with the low speed gear 235c of the branch transmission shaft 235 is the low speed output state of the sub-transmission device.

The power transmitted to the branch transmission shaft 235 is transmitted to the differential gear 236 meshing with the 1 st power transmission gear 235D, which rotates integrally with the branch transmission shaft 235, and drives the left and

right drive shafts

220, 220 via the differential device 203D to transmit the driving force to the

front axles

202a, 202 a.

The branch transmission shaft 235 is further provided with a 2 nd transmission gear 235e integrally rotating, and the power of the branch transmission shaft 235 is branched and transmitted to the intermediate transmission shaft 238 via a transmission gear 238a meshing with the 2 nd transmission gear 235e, and branched and transmitted to the rear wheel drive shaft 239 via a bevel gear 238b provided on the intermediate transmission shaft 238 and a bevel gear 239a meshing with the bevel gear 238 b.

The power transmitted to the rear wheel drive shaft 239 is transmitted to the

rear axles

202b, 202b via the drive transmission shaft 224, the transverse transmission shaft 266, the front-rear transmission shaft 267, the rear wheel transmission shaft 268, and the coupling shaft 269, and drives the rear wheels 202R.

[ Transmission form of work System ]

Next, the power transmission path to the working systems such as the threshing device 204, the grain tank 205, and the harvesting and processing device 217 will be described.

As shown in fig. 47, power of an output shaft 207a of the engine 207 is transmitted to an input rotary shaft 301 also serving as a drive shaft of the sub-wind turbine 245a of the wind turbine 245 by a work input transmission mechanism 279.

The work input transmission mechanism 279 includes a drive pulley 279a provided on the output shaft 207a of the engine 207, a driven pulley 279b provided on the input rotary shaft 301 of the sub-wind turbine 245a, and a power transmission belt 279c wound around the drive pulley 279a and the driven pulley 279b, and is configured to directly transmit the power of the output shaft 207a of the engine 207 to the input rotary shaft 301 of the sub-wind turbine 245 a.

The power of the input rotary shaft 301 of the sub-wind turbine 245a is branched and transmitted to a 1 st belt transmission mechanism 300 as a first transmission mechanism and a 2 nd belt transmission mechanism 285 as a second transmission mechanism, the 1 st belt transmission mechanism 300 transmits a driving force to each device in the sorting chamber 204B of the thresher 204 and the winnowing device 310 that feeds grains to the grain tank 205, and the 2 nd belt transmission mechanism 285 transmits a driving force to the threshing cylinder 240 and the harvesting device 217 of the thresher 204.

That is, after the power of the output shaft 207a of the engine 207 is transmitted to the input rotary shaft 301 of the sub-windmill 245a by the work input transmission mechanism 279, the 1 st belt transmission mechanism 300 transmits the driving force to each device in the sorting chamber 204B of the threshing device 204 such as the main windmill 245B of the windmill 245 and the winnowing device 310 that feeds grains into the grain tank 205, and the 2 nd belt transmission mechanism 285 transmits the driving force to the threshing cylinder 240 and the harvesting device 217 of the threshing device 204.

In this embodiment, the 1 st belt transmission mechanism 300 and the 2 nd belt transmission mechanism 285 are disposed on the left side opposite to the right side of the threshing device 204 where the engine 207 is disposed in the left-right direction of the threshing device 204, and the 1 st belt transmission mechanism 300 is disposed further toward the rear side than the input rotary shaft 301 on the left lateral side of the sorting chamber 204B of the threshing device 204.

The 2 nd belt transmission mechanism 285 is disposed on the left lateral side of the threshing device 204, at the front side above the input rotary shaft 301 (see fig. 32 and 47).

In the 1 st belt transmission mechanism 300, power is transmitted from the 1 st drive pulley 301a of the input rotary shaft 301 to the main windmill 245b, the first screw 247a, the second screw 248a, the swing sorting mechanism 246, the stalk discharging device 216, and the like via the

transmission belts

302, 303, 304, 305, and a driving force is also transmitted to the second feeder 249 and the winnowing device 310.

In the 2 nd belt transmission mechanism 285, the driving force for the cleaving apparatus 217 is transmitted by the power transmitted from the 2 nd drive pulley 301b of the input rotary shaft 301 via the

transmission belts

306 and 308 and from the 1 st drive pulley 301a via the transmission belt 307.

The power transmitted via the belt 306 also transmits a driving force to the stroking roller input shaft 240a of the stroking roller 240 via the transmission shaft 286. Further, power is transmitted from another transmission shaft 287 to the transmission belt 308 via an input bevel gear 240b provided in the stripping roller input shaft 240a, and the rotation of the transmission belt 308 is transmitted as power rotating in reverse to the transmission belt 307, and a clutch device, not shown, is used, so that forward and reverse rotational power can be selectively supplied to the feeder 217A.

[ other embodiment of embodiment 3]

(1) In the above embodiment, the traveling device 202 is configured such that the front wheels 202F are non-steering wheels and the rear wheels 202R are steering wheels, but the present invention is not limited to this, and the front wheels 202F may be steering wheels and the rear wheels 202R may be non-steering wheels. Further, both the front wheels 202F and the rear wheels 202R may be configured by steering wheels.

Other configurations may be the same as those of the above embodiment.

(2) In the above embodiment, the traveling device 202 has a structure configured to drive both the front wheels 202F and the rear wheels 202R, but the present invention is not limited to this, and for example, the front wheels 202F may be used as drive wheels configured from non-steering wheels and the rear wheels 202R may be configured from non-driven steering wheels, or the front wheels 202F may be used as non-driven steering wheels and the rear wheels 202R may be used as drive wheels configured from non-steering wheels.

Further, both the front wheels 202F and the rear wheels 202R may be configured as steering wheels, and either the front wheels 202F or the rear wheels 202R may be configured as drive wheels.

Other configurations may be the same as those of the above embodiment.

(3) In the above embodiment, the configuration in which the front traveling unit is configured by the front wheels 202F configured by the non-steering wheels and the rear traveling unit is configured by the rear wheels 202R configured by the steering wheels has been described, but the present invention is not limited to this, and for example, the front traveling unit may be configured by a half-crawler type crawler traveling device and the rear traveling unit may be configured by the rear wheels 202R configured by the steering wheels. Conversely, the front traveling unit may be configured by the front wheels 202F configured by steering wheels, and the rear traveling unit may be configured by a semi-crawler type crawler traveling device.

In this case, the half-track type crawler travel device may be driven, and the rear wheels 202R and the front wheels 202F formed of the steering wheels may be non-driven wheels, or the half-track type crawler travel device may be driven together with the rear wheels 202R and the front wheels 202F formed of the steering wheels.

Other configurations may be the same as those of the above embodiment.

(4) In the above embodiment, the grain tank 205 disposed above the threshing device 204 is configured by a series of structures spanning the position above the engine 207 and the position above the threshing device 204, and the right bottom portion 252a of the bottom plate 252 of the grain tank 205 corresponding to the position above the engine 207 is positioned lower than the left bottom portion 252b corresponding to the upper side of the top plate 204b of the threshing device 204.

Other configurations may be the same as those of the above embodiment.

(5) In the above embodiment, the structure in which the grain tank 205 disposed above the threshing device 204 is suspended to both the left and right sides of the threshing device 204 is shown, but the present invention is not limited to this. For example, the structure may be such that the device is suspended from a position above the threshing device 204 toward a position above the engine 207, or the device is provided only at a position above the threshing device 204, or only at a position above the engine 207, or the device is suspended from a position above the threshing device 204 toward a position opposite to the position above the engine 207. The threshing device 204 may be arranged such that the threshing cylinder rotation axis p1 coincides with or substantially coincides with the center line C in the left-right direction of the machine body.

Other configurations may be the same as those of the above embodiment.

(6) In the above embodiment, the following configuration is shown: a grain tank 205 disposed above the threshing device 204 is tiltably configured by a damping cylinder 256 around a horizontal axis z4 provided at one end side in the left-right direction, and an openable grain outlet 253a is provided at the side opposite to the side where the horizontal axis z4 is provided, so that grains can be discharged in a tilting posture; but is not limited thereto. For example, instead of providing the grain tank 205 with the openable grain outlet 253a, a discharging auger or the like, not shown, may be provided to discharge the grains.

With this configuration, the grain tank 205 can be discharged without providing the damping cylinder 256 for tilting, but by providing the damping cylinder 256, the bottom of the grain tank 205 can be tilted away from the upper surface side of the threshing device 204, and maintenance of the upper part of the threshing device can be easily performed.

Other configurations may be the same as those of the above embodiment.

(7) In the above embodiment, the supporting leg portions 212 for supporting the grain tank 205 are provided on the upper side of the lattice-like mounting frame 211 on the side opposite to the side on which the threshing device 204 is biased, but the present invention is not limited to this, and may be provided on the upper side of the lattice-like mounting frame 211 on the same side as the side on which the threshing device 204 is biased, and configured to be capable of supporting the grain tank 205 with a wide width on both the left and right sides.

Other configurations may be the same as those of the above embodiment.

(8) In the above embodiment, the upper end of the engine 207 is disposed at a position slightly lower than the upper end of the outer peripheral edge of the front wheel 202F or at the same height, but the present invention is not limited thereto.

For example, the following may be provided: the main portion of the engine 207 is positioned to the same extent as the upper end of the outer periphery of the front wheel 202F, and the accessories and a small portion of the engine 207 are positioned above the upper end of the front wheel 202F.

The lower surface of the engine 207 is not limited to being disposed at substantially the same height as the front axle 202a, and may be disposed, for example, such that the lower surface of the engine 207 is located lower than the front axle 202a or the crank shaft of the engine 207 is located lower than the front axle 202 a.

(9) In the above embodiment, the engine 207 disposed on the lateral side of the threshing device 204 is disposed between the front wheel 202F and the rear wheel 202R in a side view and disposed at a position overlapping the front wheel 202F in a front-rear direction view, but the present invention is not limited to this, and may be disposed as follows.

For example, the engine 207 may be positioned between the lateral side wall 204a of the threshing device 204 and the inner end surface of the front wheel 202F facing the center of the machine body in the lateral direction, and the front end of the engine 207 may be positioned at a position in the longitudinal direction, which is approximately the same as the front axle 202a, on the front side of the rear end of the front wheel 202F, or on the rear side of the front axle 202 a.

The positional relationship between the threshing device 204 and the engine 207 in the front-rear direction is not limited to the case where they are located at substantially the same position in the front-rear direction, and the front end of the engine 207 may be located at a position spaced rearward from the front wall 204c of the threshing device 204.

(10) In the above embodiment, the structure in which the entire lower surface side of the threshing device 204 is opened is exemplified, and the structure is shown in which the maintenance in the opened state of the lower surface side of the threshing device 204 is facilitated by providing the drive transmission shaft 224 of the rear wheel drive shaft 239 at a position deviated from the lower surface of the threshing device 204, but the structure is not limited to this. For example, in a structure in which part of the lower surface side is partially opened instead of the entire lower surface side of the threshing device 204, the drive transmission shaft 224 may be provided at a position deviated from the opened region of the lower surface side.

Other configurations may be the same as those of the above embodiment.

(11) In the above embodiment, the configuration in which the drive transmission shaft 224 is used as the drive transmission means has been described, but the drive transmission means is not limited to the configuration in which the transmission is performed by a shaft, and may be a transmission chain or a transmission belt.

Other configurations may be the same as those of the above embodiment.

(12) In the above embodiment, the structure is shown in which the exterior cover 209 can be opened and closed by swinging about the swing fulcrums z2 and z3 along the front-rear direction, but the structure is not limited to this, and for example, although not shown, a swing fulcrum along the up-down direction may be provided on the front side or the rear side of the bicycle body, and the structure may be configured to be opened and closed by swinging about a swing fulcrum along the up-down direction.

Other configurations may be the same as those of the above embodiment.

(13) Fig. 48 to 50 show another embodiment of a conventional combine harvester employing a structure including a grain carrying-out auger 320 as the grain tank 205, the grain carrying-out auger 320 carrying out grains stored in the tank main body 251 to the outside.

This grain box 205 has the same shape as the box main body 251 shown in the above embodiment, but does not have a structure corresponding to the grain outlet 253a and the opening/closing plate 253b at the right end portion, which is the side where the horizontal axis z4 as the swing center of the grain box 205 exists, and the lid plate 257 as shown in fig. 42 to 44. That is, the right end portion of the grain box main body 251 is formed by a simple flat vertical plate 253 similar to the front and rear end portions and the left end portion, and is not formed with an opening through which grains can be discharged in association with swinging.

The grain carrying auger 320 includes a bottom discharge screw 321 near the right end of a right bottom 252b formed lower by one step than a left bottom 252a of the bottom plate 252 on the box main body 251, and the bottom discharge screw 321 is rotatably supported with a screw axis thereof aligned with a horizontal axis z4 that is a swing center of the grain box 205.

A vertical screw 322 for lifting and transporting the discharged grains is connected to the outlet side of the bottom discharge screw 321, and a horizontal screw 323 for horizontally transporting the lifted grains to the outside is connected to the upper end side of the vertical screw 322, and the grain transporting auger 320 is constituted by the bottom discharge screw 321, the vertical screw 322, and the horizontal screw 323.

As shown in fig. 50, the longitudinal screw 322 of the grain carrying-out auger 320 includes: a lower cylindrical portion 322a integrally supported by a body front side pivot support portion 255 of a pair of front and rear pivot support portions 255 provided on the upper right end portion of the support leg portion 212 erected on the right side portion of the threshing device 204; and an upper cylinder portion 322b connected to an upper side of the lower cylinder portion 322 a.

The outer peripheral gear 322c formed on the lower outer periphery of the upper cylindrical portion 322b is engaged with the drive gear 324a of the electric motor 324 for rotation, and the upper cylindrical portion 322b is configured to be rotatable relative to the lower cylindrical portion 322a about the vertical axis y3 by the driving force of the electric motor 324.

Therefore, the horizontal screw 323 integrally connected to the upper end side of the upper cylinder portion 322b of the vertical screw 322 is configured to be rotated about the vertical axis y3 together with the upper cylinder portion 322b rotated about the vertical axis y3 by the driving force of the electric motor 324.

By this turning operation, the horizontal screw 323 can turn around the vertical axis y3 as shown by the imaginary line in the figure from the storage position along the vertical plate 253 at the right end portion of the box main body 251 as shown by the solid line in fig. 49, and select an arbitrary discharge position protruding outward in the lateral direction. And, at the selected arbitrary discharge position, the grain can be discharged from the discharge port 323a located farther from the vertical axis y 3.

The bottom discharge screw 321, the vertical screw 322, and the horizontal screw 323 of the grain carrying auger 320 are coupled to each other via bevel gears provided at the shaft ends of the respective screw shafts.

As shown in fig. 50, the grain carrying auger 320 is configured to transmit power from the engine 207 via a 3 rd belt transmission mechanism 325, and the 3 rd belt transmission mechanism 325 is wound around an output pulley 207d provided on an output shaft 207a of the engine 207 and an input pulley 321a provided on one end of a bottom discharge screw 321 of the grain carrying auger 320. That is, the 3 rd belt transmission mechanism 325 constitutes a power input portion to the grain tank 205.

The 3 rd belt transmission mechanism 325 includes: a 1 st belt 275a also functioning as a transmission mechanism 275 for supplying power of the engine 207 to the radiator 270; and a 1 st relay pulley 326a for the auger, fixed to a 1 st relay shaft 207b supporting a 1 st relay pulley 207e, the 1 st relay pulley 207e being wound around the 1 st belt 275 a.

The 1 st relay shaft 207b is provided on the upper portion of the support leg portion 212 on the rear side of the engine 207, and the 1 st propeller shaft 207g having a shaft axis parallel to the 1 st relay shaft 207b is provided at a portion corresponding to the upper front portion of the engine 207 on the upper portion of the support leg portion 212 at substantially the same height as the 1 st relay shaft 207b, and an auger 2 nd relay pulley 326b is attached so as to rotate integrally therewith.

An auger-use 2 nd transmission shaft 207h is provided at a portion corresponding to the upper front portion of the engine 207, on the upper portion of the support leg portion 212 having substantially the same height as the auger-use 1 st transmission shaft 207g, and at the tip end side thereof, with an auger-use 3 rd relay pulley 326c that rotates integrally, and the auger-use 2 nd transmission shaft 207h has a shaft core that is orthogonal to the shaft core of the auger-use 1 st transmission shaft 207g and is parallel to the transverse shaft core z4 of the bottom discharge screw 321.

The 1 st propeller shaft 207g for the auger and the 2 nd propeller shaft 207h for the auger are supported by a common relay box 327 provided at an upper portion of the supporting leg portion 212, and are configured such that bevel gears (not shown) provided on a side opposite to a side where the 2 nd relay pulley 326b for the auger or the 3 rd relay pulley 326c for the auger is present are engaged with each other to transmit power.

The 1 st transmission belt 275a for driving the radiator 270, which also functions as the 1 st transmission belt for the auger, is wound over the output pulley 207d of the engine 207 and the 1 st relay pulley 326a for the auger, which are disposed as described above, the 2 nd transmission belt 325a for the auger is wound in the front-rear direction over the 1 st relay pulley 326a for the auger and the 2 nd relay pulley 326b for the auger, and the 3 rd transmission belt 325b for the auger is wound in the up-down direction over the 3 rd relay pulley 326c for the auger and the input pulley 321a of the bottom discharge screw 321.

That is, the 1 st belt 275a, the 2 nd belt 325a for the auger, and the 3 rd belt 325b for the auger constitute the 3 rd belt transmission mechanism 325 for transmitting the engine power to the grain carrying-out auger 320.

The 2 nd belt 325a for the auger includes a belt tension clutch including a tension pulley 328a provided on a tension arm 328 which is swingably operated, and is configured to be capable of switching between a tension state for transmission in which the tension pulley 328a is pressed against the 2 nd belt 325a for the auger and a slack state in which the pressing is released to stop the transmission, and to switch between driving and stopping the bottom discharge screw 321.

The rotation position around the vertical axis y3 of the upper cylinder portion 322b of the vertical screw 322 rotationally driven by the electric motor 324 and the horizontal screw 323 integrally connected to the upper end side thereof and the tilt posture around the horizontal axis z4 of the box main body 251 are detected by a sensor, not shown, and detection signals thereof are input to a control device, not shown, to control the operation of the electric motor 324 and the damping cylinder 256.

That is, as shown by the imaginary line in fig. 49, the extension operation of the damping cylinder 256 is restricted so that the oscillation operation of the box main body 251 about the lateral axis z4 is possible only in a state where the lateral screw 323 has moved to a position deviated from the oscillation locus of the box main body 251 about the lateral axis z4 in a plan view; the operation of the electric motor 324 is controlled so that the horizontal screw 323 is restricted from entering the range of the swing locus of the box main body 251 as long as the box main body 251 is in the tilted posture.

Other configurations may be the same as those of the above embodiment.

(14) In the above-described embodiment, the configuration in which the drive shaft of the sub-wind turbine 245a is used as the input rotary shaft 301 for transmitting the power transmitted from the output shaft 207a of the engine 207 via the work input transmission mechanism 279 from one side of the threshing device 204 where the engine 207 is present to the other side of the threshing device 204 has been exemplified, but the present invention is not limited to this, and may be configured as follows, for example.

That is, as shown in fig. 51, the following structure is adopted: instead of the sub-wind turbines 245a, only the main wind turbines 245B are used as the wind turbines 245, and an air passage 245c is formed in the upper portion of the main wind turbine 245B so as to face the upper portion of the sorting chamber 204B.

In this structure, the intermediate shaft that extends across the threshing device 204 above the air passage 245c above the main wind turbine 245b forms the input rotary shaft 301 that is transmitted from one side of the threshing device 204 where the engine 207 is present to the other side of the threshing device 204.

The power is transmitted from the work input transmission mechanism 279 to the shaft portion of the intermediate shaft protruding from the threshing device 204 to the side where the engine 207 is present, and the power is transmitted from the shaft portion protruding to the other side of the threshing device 204 to the 1 st belt transmission mechanism 300 and the 2 nd belt transmission mechanism 285.

Other configurations may be the same as those of the above embodiment.

(15) In the above embodiment, the structure in which transmission 203 arranged in front of threshing device 204 is disposed at a position partially overlapping feeder 217A in a plan view has been described, but the present invention is not limited to this, and transmission 203 arranged in front of threshing device 204 may be disposed at a position not overlapping feeder 217A in a plan view.

Other configurations may be the same as those of the above embodiment.

(16) The combine harvester is not limited to harvesting grains such as rice, wheat, and corn, but can be applied to equipment for harvesting beans such as soybean, and flowers such as rapeseed.

Industrial applicability

The present invention can be applied to a harvesting machine such as a combine harvester or a corn harvester, which includes a harvesting and conveying unit on a traveling vehicle body for harvesting and conveying a crop rearward.

Description of the reference numerals

1 front wheel

2 rear wheel

3 traveling vehicle body

4 cutting and conveying part

5 cutting lifting actuator

7 riding driving part

8 threshing part

9 grain box

10 engines

17R, 17L are directed to the frame body

18 a-18 f transversely directed frame

23 rear axle box

26 auxiliary frame

27-box supporting frame body

CL center part

F vehicle body frame

Fh projecting frame part

L1, L2, L3 intervals

P1 fulcrum

Q recess

X1 axle center

101 vehicle body frame

102 traveling device

102F front wheel (non-steering wheel)

102R rear wheel (steering wheel)

102a front axle (axle)

102b rear axle (axle)

103 cockpit

104 threshing device

104b top plate

105 grain box

108 engines

109 gearbox

112 support foot

150a bottom

150b bottom

170 feeder

p1 stroking roller axis of rotation

201 vehicle body frame

202 traveling device

202F front wheel (front traveling part)

202R rear wheel (rear traveling part)

203 speed variator

204 threshing device

204A stripping chamber

204a lateral side wall

204b top plate

205 cereal box

207 engines

208 fuel tank

209 external cover

212 supporting foot

214a support wrist

249 number two send back device

270 radiator

280a lateral side

y2 swing axle core

z2, z3 swing fulcrum

z4 transverse axis core

z5 oscillates the axis.

Claims

1. A combine harvester is characterized by comprising:

a vehicle body frame including a main frame including a pair of left and right vertical frames and a plurality of horizontal frames connecting the pair of left and right vertical frames, and a box placing table disposed on a lateral outer side of one of the pair of left and right vertical frames;

a traveling device which is arranged below the self-propelled body so as to support the main frame and which is composed of a pair of left and right front wheels and a pair of left and right rear wheels;

a harvesting processing device which is arranged on the main frame at the front part of the self-advancing machine body;

a threshing device which is placed on the main frame on the rear side of the harvesting device, and which has a stroking roller and a sorting chamber located below the stroking roller;

a fuel tank which is placed on the tank placing table at a lateral side of the left or right side of the threshing device and which is provided with a protection frame;

the fuel tank is in a posture with a longitudinal direction along a front-rear direction of the machine body, is positioned laterally to the stroking roller in a plan view, and is arranged in a state of being overlapped with the sorting chamber in a side view,

the box placing table is formed so as to be positioned between the front wheel and the rear wheel and so as to be positioned lower than the main frame.

2. A combine harvester according to claim 1,

a tank body of the fuel tank, which is a container for storing fuel, is integrally connected to the protection frame surrounding the tank body.

3. A combine harvester according to claim 1,

the fuel tank is formed in a vertically long shape having a vertical width larger than a horizontal width when viewed in a front-rear direction of the machine body.

4. A combine harvester according to claim 1,

the fuel tank is formed in a laterally long shape having a front-rear width larger than a top-bottom width in a side view.

5. A combine harvester according to claim 2,

the fuel tank is mounted on a tank mounting table extending laterally outward of the threshing device, and the tank main body is mounted together with the protection frame.

6. A combine harvester according to claim 4,

the fuel tank is mounted on a tank mounting table extending laterally outward of the threshing device, and the tank main body is mounted on the tank mounting table together with the protection frame.

7. A combine harvester according to any one of claims 1 to 6,

the fuel tank is configured to swing about a swing axis in a vertical direction to freely change a position to a fixed position where a longitudinal direction is along a front-rear direction of the machine body so that a lateral side surface of the fuel tank is along a lateral side wall of the threshing device, and to an open position where the lateral side surface is swung away from the lateral side wall of the threshing device.

8. A combine harvester according to claim 7,

covering an outer side of the belt transmission mechanism outside the sorting chamber of the threshing device with the fuel tank in the fixed position,

when the fuel tank is operated to the open position, a maintenance space for exposing the belt transmission mechanism is secured.

9. A combine harvester according to claim 7,

the swing shaft core is located in the vicinity of a laterally outward extending end of the box mounting table and in the vicinity of an extending end of a support arm extending laterally outward from a lateral side wall of the threshing device.

10. A combine harvester according to claim 8,

11. A combine harvester according to claim 7,

the fuel tank is provided with a locking means of an elastic engagement type at a lower portion of the protection frame, and the locking means is configured to freely hold the fuel tank at the fixed position in a state where the fuel tank is swung to the fixed position.

12. A combine harvester according to any one of claims 8 to 10,

13. A combine harvester according to claim 11,

the locking tool is configured to be capable of being engaged into a locking hole provided in the tank mounting table by an urging force of a spring to prevent the fuel tank from moving outward,

the fuel tank can be switched to the open position by manually lifting the locking tool against the biasing force of the spring to release the locking.

14. A combine harvester according to claim 12,

15. A combine harvester according to any one of claims 1 to 6,

the fuel tank is disposed between the front wheel and the rear wheel.

16. A combine harvester according to any one of claims 1 to 6,

an exterior cover separated from the lateral side wall of the threshing device and covering the lateral side is provided,

the exterior cover is disposed outside the fuel tank,

the outer cover is configured to be swingable around a swing fulcrum in the front-rear direction of the body so as to be openable and closable.

17. A combine harvester according to claim 16,

the exterior cover is provided with a holding means capable of being switched between a holding state capable of being held at a closed position and a release state allowing an opening operation,

the holding tool is configured to be capable of holding a position in a state where the exterior cover is closed by being locked to a locking tool provided on the protective frame of the fuel tank,

and the locking tool is unlocked, so that the state of allowing the opening operation of the external cover can be switched.

18. A combine harvester is characterized in that a vehicle body frame is supported by a traveling device, the traveling device is provided with a pair of left and right front traveling parts and a pair of left and right rear traveling parts, the combine harvester is provided with a harvesting and conveying part which is arranged on the vehicle body frame and used for harvesting crops and conveying the crops to the rear and a threshing device arranged on the vehicle body frame, an engine is arranged on the right side or the left lateral side of the threshing device, a riding driving part is arranged on the front side of the threshing device, a transmission is arranged on the front side of the threshing device and positioned below the riding driving part, the transmission changes the speed of power transmitted from the engine side and outputs the power to the front traveling parts,

the harvesting and conveying part is provided with a harvesting part for harvesting crops and a feeder which conveys the crops harvested by the harvesting part towards the threshing device and inclines towards the rear upper part,

the transmission is provided at a position lower than the feeder so as to partially overlap the feeder in a plan view, and a front side of an upper surface of the transmission is formed as an inclined surface inclined downward toward a front end side.