CN111918544A

CN111918544A - Combine harvester

Info

Publication number: CN111918544A
Application number: CN201980022573.5A
Authority: CN
Inventors: 河合雄一郎; 丸山纯一; 小宫良介
Original assignee: Kubota Corp
Current assignee: Kubota Corp
Priority date: 2018-04-27
Filing date: 2019-04-23
Publication date: 2020-11-10
Anticipated expiration: 2039-04-23
Also published as: CN117322231A; CN111918544B; WO2019208541A1

Abstract

A combine harvester equipped with: a driver unit having a driver seat (37); and a cab covering the cab. The lower end of the rear wall (9A) of the cab is placed on and supported by the upper end surface of the rear wall (8A) of the cab.

Description

Combine harvester

Technical Field

The invention relates to a combine harvester.

Background

[1]

Conventionally, as a combine harvester, for example, a combine harvester described in patent document 1 is known. Patent document 1 discloses a combine harvester including: an operation unit (in the literature, "operation unit (11)") having an operation seat (in the literature, "operation seat (13)"); and a cab (in the literature, "cab (12)") covering the cab.

[2]

Conventionally, as a combine harvester, for example, a combine harvester described in patent document 1 is known. Patent document 1 discloses a combine harvester including: an operation unit (in the literature, "operation unit (11)") having an operation seat (in the literature, "operation seat (13)"); an engine room provided below the driver's cab and accommodating an engine (in the literature, "engine (23)"); an engine hood (in the literature, "engine hood (22)") for placing and supporting a driving seat and separating a boarding space of a driving part from an engine room; a radiator (in the literature, "radiator (31)") which is provided in the engine compartment on the outer side of the engine body with respect to the engine and which radiates engine cooling water; and a dust cover (in the literature, "lateral cover part (22B)") covering the radiator from the lateral outside of the machine body in a state of allowing ventilation and in a state of preventing dust from passing through. In the combine harvester disclosed in patent document 1, the lateral cover portion (22B) is formed to extend to a height higher than the upper cover portion (22C), and the area of the outside air intake portion (34) can be made sufficiently large.

[3]

Conventionally, as a combine harvester, for example, a combine harvester described in patent document 1 is known. Patent document 1 discloses a combine harvester including: an operation unit (in the literature, "operation unit (11)") having an operation seat (in the literature, "operation seat (13)"); an engine (in the literature, "engine (23)") provided below the driver seat; and an engine hood (in the literature, "engine hood (22)") having a roof (in the literature, "upper side cover portion (22C)") on which a driver seat is mounted and supported and covering the engine. The hood (22) is configured to be capable of swinging between a normal posture and a maintenance posture around a front-rear axle core (X). In the combine harvester described in patent document 1, maintenance in the engine room can be performed by opening the inside of the hood (22) by switching the hood to a maintenance posture.

Documents of the prior art

Patent document

Patent document 1: japanese laid-open patent publication No. 2012-100610

Disclosure of Invention

Problems to be solved by the invention

[1]

The problems corresponding to the background art [1] are as follows.

In the combine harvester described in patent document 1, the cab is disposed to cover the cab, but there is room for improvement in ensuring airtightness in the cab and stably supporting the cab on the cab.

In view of the above circumstances, a combine harvester capable of ensuring airtightness in the cab and stably supporting the cab on the cab is desired.

[2]

The problems corresponding to the background art [2] are as follows.

In the combine harvester described in patent document 1, the dust cover is a high member, but it cannot be said that the dust cover is stably supported in connection with the upper portion.

In view of the above circumstances, a combine harvester capable of stably supporting a dust cover is desired.

[3]

The problems corresponding to the background art [3] are as follows.

The combine harvester described in patent document 1 has a large-scale structure in which the entire hood is swung, and there is room for improvement in terms of simplifying the structure in which the inside of the hood is opened.

In view of the above circumstances, a combine harvester is desired which can simplify the structure for opening the interior of the hood and which can facilitate maintenance in the engine compartment.

Means for solving the problems

[1]

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

The present invention is characterized by comprising: a driver part having a driver seat; and a cab covering the cab, wherein a lower end portion of a rear wall of the cab is supported by an upper end surface of the rear wall of the cab.

According to this characteristic structure, the gap is closed by the lower end portion of the rear wall of the cab and the upper end surface of the rear wall of the cab. This ensures airtightness in the cab. Further, the rear wall of the cab is a portion of the cab having high rigidity, and the cab can be stably supported by the cab.

In the present invention, it is preferable that an inclined wall portion inclined forward and downward is provided on a rear wall of the cab, and the cab is placed on and supported by an upward surface of the inclined wall portion.

According to this characteristic configuration, the surface (placement surface) of the inclined wall portion that is placed on and supports the cab is ensured to be long in the front-rear direction, and the cab can be supported more stably by the cab.

In the present invention, it is preferable that the cab be provided with a side panel provided on one side of the body in the left-right direction with respect to the driver seat, the cab be supported on an upper surface of a side panel frame constituting the side panel, and an upward surface of the inclined wall portion be continuous with the upper surface of the side panel frame.

According to this characteristic structure, the cab can be placed on and supported by the upper surface of the side panel frame. The mounting surface of the inclined wall portion is continuous with the mounting surface of the side panel frame. This makes it possible to easily mount and support the cab on the cab portion without generating a difference in height between the mounting surface of the inclined wall portion and the mounting surface of the side panel frame.

In the present invention, it is preferable that a side window is provided in a side portion of the cab on the side of the side panel, and a lower end portion of a sash of the side window is supported by an upward surface of the inclined wall portion and an upper surface of the side panel frame.

According to this feature, the sash in the side window is mounted and supported over a wide range spanning the inclined wall portion and the side panel frame. This enables the cab to be supported by the cab more stably.

In the present invention, it is preferable that the rear wall of the cab and the side panel frame extend to a position outside the cab.

According to this characteristic configuration, the rear wall and the side panel frame supported by the cab are placed on as many portions as possible, and the cab can be supported by the cab more stably.

In the present invention, it is preferable that a lateral frame extending in the left-right direction of the machine body along the upper end portion of the rear wall of the cab be provided, and the left and right end portions of the lateral frame be supported by a vertical frame provided upright on the machine body frame.

According to this characteristic structure, the rigidity of the upper end portion of the rear wall of the cab is improved. The rear wall of the cab is supported by the left and right vertical frames via the lateral frames. This enables the rear wall of the cab to be stably supported.

In the present invention, it is preferable that a rear window is provided in a rear wall of the cab, and a lower end portion of the rear window is supported by being placed on an upper surface of the lateral frame.

According to this characteristic structure, the rear window can be stably placed and supported by the lateral frame having a high rigidity in the rear wall of the cab.

In the present invention, it is preferable that an intermediate vertical frame is provided upright on the body frame between the left vertical frame and the right vertical frame, and a right-left intermediate portion of the lateral frame is supported by the intermediate vertical frame.

According to this characteristic structure, the rear wall of the cab is supported to the intermediate longitudinal frame via the lateral frame. This enables the rear wall of the cab to be supported more stably.

In the present invention, it is preferable that a vertical frame located on the lateral outer side of the machine body out of the left vertical frame and the right vertical frame is provided with an inclined portion inclined forward and downward, and the cab is placed on and supported by an upward surface of the inclined portion.

According to this characteristic configuration, the cab can be placed on and supported by the vertical frame located on the lateral outer side of the machine body. In this case, the surface (mounting surface) of the inclined portion that faces upward to mount and support the cab is longer in the front-rear direction, and the cab can be supported more stably by the cab.

In the present invention, it is preferable that an upper surface of the lateral frame is continuous with an upward surface of the inclined portion.

According to this characteristic structure, the mounting surface of the lateral frame is continuous with the mounting surface of the inclined portion. Thus, a height difference is not generated between the mounting surface of the lateral frame and the mounting surface of the inclined portion, and the cab is easily mounted on and supported by the cab.

Further, in the present invention, it is preferable that: an engine room provided below the cab and accommodating an engine; and a dust cover that covers a lateral portion of the engine room on the outside in the lateral direction of the engine body in a state that air is allowed to pass therethrough and that blocks passage of dust therethrough, wherein an outer peripheral shape of the vertical frame located on the outside in the lateral direction of the engine body is formed into a shape that follows an outer peripheral shape of the dust cover, and the vertical frame constitutes a receiving surface that receives the dust cover from the outside in the lateral direction of the engine body.

According to this feature, the vibration-proof cover is received by the longitudinal frame located laterally outside. This enables stable support of the dust cover.

In the present invention, it is preferable that a landing door is provided on a lateral outer side of the machine body in the cab, and a floor portion supported by the cab is placed on a lower end portion of a door frame of the landing door.

According to this characteristic structure, the door frame can be stably supported.

[2]

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

The present invention is characterized by comprising: a driver part having a driver seat; an engine room provided below the cab and accommodating an engine; an engine hood that supports the driver seat and separates a passenger space of the driver unit from the engine compartment; a radiator that is provided in the engine room on the outer side in the lateral direction of the engine body with respect to the engine and radiates engine cooling water; and a dust cover that covers the heat sink from the outside in the lateral direction of the machine body in a state that allows air to pass therethrough and in a state that blocks passage of dust, wherein a dust cover frame that constitutes a receiving surface that receives the dust cover from the outside in the lateral direction of the machine body is provided upright on the machine body frame, an outer peripheral shape of the dust cover frame is formed into a shape that follows an outer peripheral shape of the dust cover, and the dust cover frame extends to a height position above an upper end of the engine hood.

According to this feature, the dust cover frame extends to a height above the upper end of the engine hood, and the dust cover is received by the receiving surface up to the upper portion. This enables the antimagnetic cover to be stably supported.

Further, in the present invention, it is preferable that the dust cover frame is provided with: a front longitudinal frame portion constituting a front portion of the dust cover frame; and a rear longitudinal frame portion constituting a rear portion of the dust cover frame, an upper end portion of the front longitudinal frame portion being coupled to an upper end portion of the rear longitudinal frame portion.

According to this characteristic structure, the upper end portion of the front longitudinal frame portion is coupled to the upper end portion of the rear longitudinal frame portion, whereby the front longitudinal frame portion and the rear longitudinal frame portion are integrated. This can improve the rigidity of the dust cover frame.

Further, in the present invention, it is preferable that the dust cover frame is provided with: an intermediate frame portion that straddles the front and rear longitudinal frame portions at a height position that is the same as a height position of an upper end portion of the hood; and a lower frame portion straddling lower end portions of the front and rear longitudinal frame portions.

According to the present characteristic structure, the front longitudinal frame portion and the rear longitudinal frame portion are integrated via the intermediate frame portion and the lower frame portion. This can further improve the rigidity of the dust cover frame. In addition, the dust cover frame has a large opening portion in a portion above the intermediate frame portion and in a portion between the intermediate frame portion and the lower frame portion. This makes it possible to easily perform maintenance in the engine room from the outside through the opening portions.

In the present invention, it is preferable that a first vertical frame supporting a rear portion of the hood is provided upright on the body frame behind the cab, and a lateral frame is provided so as to straddle the dust cover frame and the first vertical frame.

According to this feature, the rear portion of the hood can be stably supported. Further, the dust cover frame and the first longitudinal frame are integrated via the lateral frame. This enables the construction of a highly rigid frame structure.

In the present invention, it is preferable that the first vertical frame extends to a height position above an upper end of the hood, the lateral frame is provided so as to straddle the dust cover frame and the first vertical frame at a height position above the upper end of the hood, a rear wall is erected at an upper portion of the hood behind the driver seat, and an upper portion of the rear wall is supported by the lateral frame.

According to this feature, the dust cover frame, the first longitudinal frame, the lateral frame, and the rear wall are integrated. This can further improve the rigidity of the frame structure.

In the present invention, it is preferable that the driver part is provided with a side panel provided on the side opposite to the dust cover frame side in the lateral direction of the body with respect to the driver seat, a second vertical frame for supporting a rear part of the side panel is provided upright on the body frame, the second vertical frame extends to a height position above an upper end of the hood, and an upper end part of the second vertical frame is connected to the lateral frame.

According to this feature, the rear portion of the side panel can be stably supported. Further, the dust cover frame, the first longitudinal frame, the lateral frame, and the second longitudinal frame are integrated. This can further improve the rigidity of the frame structure.

In the present invention, it is preferable that a third vertical frame is provided upright on the body frame behind the second vertical frame, the third vertical frame is connected to a threshing device, and the second vertical frame is connected to the third vertical frame.

According to this feature, the dust cover frame, the first longitudinal frame, the transverse frame, the second longitudinal frame, the third longitudinal frame, and the threshing device are integrated. This can further improve the rigidity of the frame structure.

In the present invention, it is preferable that the strainer for the engine is supported by the third vertical frame, and an air cleaner for the engine is provided behind the rear wall.

According to this feature, the strainer can be supported by the third longitudinal frame. Further, the strainer and the air cleaner are located close to each other. This can shorten the air flow path between the strainer and the air cleaner.

In the present invention, it is preferable that the cab includes a cab covering the cab portion, and the cab is supported by the lateral frame.

According to this characteristic structure, the cab can be supported by the lateral frame, and the cab can be stably supported by the cab while ensuring airtightness in the cab.

In the present invention, it is preferable that the dust cover frame is provided with a cab that covers the cab, and the cab is supported by the dust cover frame.

According to this feature, the cab can be supported by the dust cover frame, and the cab can be stably supported by the cab while ensuring airtightness in the cab.

[3]

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

The present invention is characterized by comprising: a driver part having a driver seat; an engine provided below the driver seat; an engine cover having a top plate on which the driver seat is placed and supported and covering the engine; and a cab frame that is provided upright on the body frame and supports the engine hood, wherein the cab seat and the roof panel are arranged to be detachable from the cab frame.

According to this characteristic structure, the inside of the hood can be opened by detaching the driver seat and the roof panel. This makes it possible to easily perform maintenance in the engine room. Further, the structure in which the interior of the hood is opened can be simplified as compared with a structure in which the hood is swung to switch between the normal posture and the maintenance posture.

Further, in the present invention, it is preferable that the hood be provided with a front wall that straddles a front end portion of the roof panel and a rear end portion of the floor portion of the cab, the front wall being disposed so as to be detachable with respect to the cab frame.

According to this feature, the front wall can be further removed to open the inside of the hood more largely. This makes it easier to perform maintenance in the engine room.

In the present invention, it is preferable that a portion of a corner portion formed by the top panel and the front wall on a passenger compartment side of the cab be formed as a chamfered portion, a chamfered portion in the engine hood be provided with a front outer wall that closes the chamfered portion, and the cab seat, the top panel, the front wall, and the front outer wall be disposed so as to be integrally detachable with respect to the cab frame.

According to this characteristic configuration, the driver is not obstructed by the corner portion formed by the roof panel and the front wall when the driver gets on and off from the entrance, and the driver can smoothly get on and off. Further, by integrally detaching the driver seat, the top plate, the front wall, and the front outer wall, it is not necessary to take a lot of time to detach them individually.

Further, in the present invention, it is preferable that an armrest is provided at a detachable portion in the hood.

According to this feature, the armrest can be used as a handle for detaching a detachable portion in the hood.

Further, in the present invention, it is preferable that an inspection opening is formed in the front wall, a cover for openably and closably covering the inspection opening is provided, and a portion of the cover corresponding to the inspection opening is formed of a double wall.

According to this characteristic structure, the double wall can suppress the hot air in the engine room from being transmitted from the inspection port into the boarding space.

Drawings

Fig. 1 is a right side view showing a combine harvester.

Fig. 2 is a plan view showing the combine.

Fig. 3 is a right side view showing the cab.

Fig. 4 is a left side view showing the cab.

Fig. 5 is a rear view showing the cab.

Fig. 6 is a plan sectional view showing the cab.

Fig. 7 is a front sectional view showing the cab.

Fig. 8 is a right side view showing the rotation switching mechanism for the cooling fan.

Fig. 9 is a rear view showing the sensor support.

Fig. 10 is a perspective view showing a state where the driver seat and the hood are detached.

Fig. 11 is a perspective view showing a state where the cab and the cab are separated.

Fig. 12 is a right side cross-sectional view showing a state where the cab and the cab are separated.

Fig. 13 is a right side view showing a plate spring structure of the body frame.

Fig. 14 is a perspective view showing an engine cover according to another embodiment.

Fig. 15 is a plan view showing the unmanned aerial vehicle accommodating unit.

Detailed Description

Embodiments for carrying out the present invention will be described based on the drawings. In the following description, the direction of arrow F is referred to as "front side of the body" (see fig. 1 and 2), the direction of arrow B is referred to as "rear side of the body" (see fig. 1 and 2), the direction of arrow L is referred to as "left side of the body" (see fig. 2), and the direction of arrow R is referred to as "right side of the body" (see fig. 2).

(Integrated Structure of combine harvester)

A full-feed combine is shown in fig. 1 and 2. The combine harvester comprises a machine frame 1 and a pair of left and right crawler traveling devices 2. A harvesting part 3 for harvesting and planting the vertical grain pole is arranged in front of the running machine body. The harvesting part 3 is provided with a raking reel 4 for raking and planting the vertical grain rods, a harvesting knife 5 for cutting off the vertical grain rods and a raking auger 6 for raking and planting the grain rods.

A cab 7 is provided on the right side of the front portion of the travel machine body. Cab 7 is provided with an operator's cab 8 on which the operator gets and a cab 9 covering operator's cab 8. An engine room ER is provided below the driver section 8. A threshing device 10 for threshing the reaped rice stalks is arranged at the rear of the reaping part 3. A conveying device 11 for conveying the harvested cereal stalks to the threshing device 10 is provided so as to straddle the harvesting unit 3 and the threshing device 10. A grain storage box 12 for storing grains after threshing is arranged side by side with the threshing device 10 in the transverse direction. A grain discharging device 13 is provided for discharging the grains in the grain storage box 12 to the outside. The grain storage box 12 can be opened and closed by swinging about an axis Z1 extending in the vertical direction between the working position and the maintenance position.

In engine room ER are housed: an exhaust gas purification device 14 that performs purification processing on exhaust gas of the engine E; a radiator 15 for radiating engine cooling water; and a cooling fan 16 for cooling the radiator 15. The engine room ER and the passenger space of the cab 8 are partitioned by an engine cover 17 covering the engine E. A dust cover 18 is provided, and the dust cover 18 covers the radiator 15 and the right side portion of the engine room ER in a state allowing air to pass from the right side and preventing dust from passing therethrough.

(driver's cabin)

As shown in fig. 3 to 7, the cab 9 is equipped with a roof 19, a front window glass 20, a landing door 21, a left side window 22, a rear window 23, and a right side window 24. The landing door 21 is provided at the right side portion of the cab 9. The rear portion of the landing door 21 is swingably supported on a rear pillar 26 via a pair of upper and lower hinges 25. A door frame 27 to which the landing door 21 is attached is provided in an opening corresponding to the landing door 21 in a right side portion of the cab 9.

The left window 22 is provided in the left side portion of the cab 9. The left side window 22 is provided with a left side glass 28 and a left side window frame 29. Rear window 23 is provided in rear wall 9A of cab 9. The rear window 23 is provided with a rear glass 30 and a rear window frame 31. The right window 24 is provided in a portion of the right side of the cab 9 on the rear side of the landing door 21. The right window 24 is provided with a right glass 32 and a right sash 33.

The hinge 25 includes a shaft portion 34 and a cylindrical portion 35 through which the shaft portion 34 is inserted. The shaft portion 34 is fixed to the rear portion of the landing door 21. The cylindrical portion 35 is fixed to the rear pillar 26. The cylindrical portion 35 is provided with a stopper 36 that prevents the landing door 21 from swinging to the opening side by a certain degree or more. The shaft portion 34 is inserted through the cylindrical portion 35 from above. The lower end opening of the cylindrical portion 35 opens downward. According to this structure, rainwater is less likely to enter the interior of the cylindrical portion 35 from the upper end opening of the cylindrical portion 35, and even if rainwater enters the interior of the cylindrical portion 35, it is discharged to the outside from the lower end opening of the cylindrical portion 35. This prevents rainwater from staying inside the cylindrical portion 35, and can suppress rusting.

(Driving part)

As shown in fig. 3 to 7, the cab 8 includes a cab seat 37, a front panel 38, and side panels 39. A front cover 40 is provided in front of the cab 8. A boarding gate 41 is provided on the right side of the cab 8. The floor of the cab 8 is formed by a plate 42. An air cleaner room AR is provided behind a rear wall 8A of the cab 8 in the rear portion of the cab 8. An air cleaner 43 for the engine E is housed in the air cleaner chamber AR.

The front panel 38 is provided with a steering rod 44 and an instrument panel 45. The steering lever 44 performs operations such as steering of the traveling machine body and raising and lowering of the harvesting unit 3. The side panel 39 is provided on the left side of the driver seat 37. The side panel 39 is provided with a main shift lever 46 for shifting a main transmission (not shown), a sub-shift lever 47 for shifting a sub-transmission (not shown), and a clutch switching lever 48 for switching a work implement clutch (e.g., a harvesting clutch, a threshing clutch, etc.). The side panel 39 is provided with a side panel frame 49 constituting the side panel 39.

The rear wall 8A of the cab 8 includes: an inclined wall portion 50 inclined forward and downward; and a lateral frame 51 supporting an upper end portion of the inclined wall portion 50 and extending in the left-right direction of the machine body along the upper end portion of the inclined wall portion 50. The inclined wall portion 50 is provided upright behind the driver seat 37 on the upper portion (the ceiling plate 73) of the hood 17. A side wall portion 52 is provided at a right end portion of the inclined wall portion 50 so that dust outside the vehicle does not enter the cab 9 from an upper portion of the dust cover 18. The inclined wall portion 50 is formed integrally with the side wall portion 52.

(Engine room)

As shown in fig. 3 to 7, the exhaust gas purification device 14 performs a purification process of the exhaust gas of the engine E by a DPF (Diesel particulate filter). The exhaust gas purification device 14 is provided above the engine E below the side plate 39 in a posture in which the longitudinal direction thereof is along the front-rear direction of the engine body. The radiator 15 is provided on the right side with respect to the engine E, and is supported by a radiator frame 53. The cooling fan 16 is provided between the engine E and the radiator 15.

An oil cooler 54 for a hydrostatic continuously variable transmission (not shown) as the main transmission and an oil cooler 55 for the transmission M having a gear type sub-transmission and the like are provided on the right side of the radiator 15. An intercooler 56 for the engine E, a condenser 57 for an air conditioner (not shown), and an accumulator 58 are provided on the right side of the

oil coolers

54 and 55.

As shown in fig. 3, the upper portion of the intercooler 56 is supported to the radiator frame 53 via the front and rear upper supports 59. The upper support 59 is fixed to an upper portion of the radiator frame 53. The upper portion of the intercooler 56 is fixed to an upper support 59 by bolts 60.

The lower portion of the intercooler 56 is supported by the radiator frame 53 via front and rear lower supports 61. The lower support 61 is fixed to the lower portion of the intercooler 56 by bolts 62. The lower support 61 is fixed to an upper portion of the radiator frame 53 by a bolt 63.

The condenser 57 is supported at front and rear side portions thereof by the lower stay 61 and the radiator frame 53 via side stays 64, respectively. The side stay 64 is fixed to the front and rear sides of the condenser 57 by bolts 65. The side support 64 is fixed to the lower end of the lower support 61 and the lower portion of the radiator frame 53 by bolts 66. The reservoir 58 is fixed to the front side support 64 by bolts 67.

According to this structure, the intercooler 56 is removed together with the lower support 61 by removing the

bolts

60, 63, and the condenser 57 and the accumulator 58 are removed together with the side supports 64 by removing the bolts 66. This makes it possible to easily perform maintenance (maintenance around the

oil coolers

54 and 55, etc.).

As shown in fig. 8, a rotation switching mechanism 68 is provided, and this rotation switching mechanism 68 switches the rotation direction of the cooling fan 16 between a normal rotation direction in which the air outside the machine body flows as cooling air into the engine room ER via the dust cover 18 and a reverse rotation direction in which the air inside the engine room ER flows outside the machine body via the dust cover 18. The rotation switching mechanism 68 is provided with a swinging member 69, and the swinging member 69 is swingable about the rotation axis of the cooling fan 16 between a normal rotation position (a position indicated by a solid line in fig. 8) and a reverse rotation position (a position indicated by a two-dot chain line in fig. 8). When the swinging member 69 is located at the forward rotation position, the rotation direction of the cooling fan 16 is switched to the forward rotation direction. When oscillating body 69 is at the reverse rotation position, the rotation direction of cooling fan 16 is switched to the reverse rotation direction.

A position detection sensor 70 for detecting the position of the swinging body 69 is provided. The position detection sensor 70 is provided with a sensor arm 70a of a swing type. A metal elongated coupling member 71 (e.g., a wire) is provided to straddle the sensor arm 70a and the oscillating body 69 and couple them. A sensor support 72 is provided that supports the position detection sensor 70. The sensor support 72 is provided with a stopper portion 72a (see fig. 9) for stopping the sensor arm 70a so that the position detection sensor 70 is not assembled to the sensor support 72 at an incorrect angle. The stopper portion 72a is formed by bending a part of the sensor support 72.

(Engine hood)

As shown in fig. 6 to 8 and 10, the engine cover 17 includes: a top plate 73 on which the driver seat 37 is placed and supported; and a front wall 74 spanning the front end of the top plate 73 and the rear end of the plate 42. The hood 17 is supported by a hood framework 76. The top plate 73 is provided with a support portion 77 that supports the driver seat 37 so as to be movable forward and backward. The driver seat 37 is disposed so as to be detachable (detachable from the support portion 77) from the top plate 73. The portion of the corner portion formed by the top plate 73 and the front wall 74 on the entrance 41 side is chamfered. The chamfered portion in the engine cover 17 is provided with a front outer wall 75 that blocks the chamfered portion. In the present embodiment, the top plate 73, the front wall 74, and the front outer wall 75 are integrally formed.

A ping opening 74a is formed in the front wall 74. A cover 78 openably and closably covering the inspection opening 74a is detachably fitted to the front wall 74. A handrail 79 is provided on the front outer wall 75.

As shown in fig. 10, the hood 17 is configured to be detachable with respect to the hood framework 76. Specifically, the driver seat 37, the ceiling plate 73, the front wall 74, and the front outer wall 75 are configured to be integrally detachable with respect to the hood framework 76. The top plate 73 is detachably fixed to the hood framework 76 by bolts 80. The lower end of the front wall 74 is detachably fixed to the rear end of the plate 42 by a bolt 80. According to this configuration, by detaching the hood 17 from the hood framework 76, the hood 17 can be taken out to the outside of the cab 9 with the landing door 21 opened.

(dust-proof cover)

As shown in fig. 1, 3, and 5, the dust cover 18 includes a net body 81 and a mounting frame 82 to which the net body 81 is attached. The rear portion of the dust cover 18 is supported by the dust cover frame 83 (vertical frame) so as to be swingable around an axis Z2 extending in the vertical direction. The upper portion of the dust cover 18 is formed in a shape that is tapered upward. This increases the suction area to improve the cooling effect and improves the design. A garnish (not shown) is attached to a surface (rear surface) of the attachment frame 82 facing the dust cover frame 83.

The attachment frame 82 is provided with a cover 84 that covers a portion of the mesh body 81 above the height position of the top plate 73 from the back side. The cover 84 is made of, for example, a mesh or a metal plate. According to this configuration, the outside air sucked from the portion of the dust cover 18 above the height of the top plate 73 is blocked by the cover 84, and flows into the engine room ER from the portion of the dust cover 18 below the height of the top plate 73. This can increase the amount of outside air introduced into engine compartment ER.

(frame structure of steering unit)

As shown in fig. 3 to 6, 11, and 12, the cab frame 85 is provided upright on the body frame 1. The cab frame 85 is provided with a radiator frame 53, a hood frame 76, a dust cover frame 83, a first longitudinal frame 86 (intermediate longitudinal frame), a second longitudinal frame 87, a third longitudinal frame 88, a fourth longitudinal frame 89, and a lateral frame 51.

The heat sink frame 53 is provided upright between the heat sink 15 and the dust cover frame 83 on the body frame 1. The front bracket 90 and the rear bracket 91 are provided so as to protrude rightward from the right side of the body frame 1. The radiator frame 53 is erected on the front bracket 90 and the rear bracket 91. The right end portion of the hood framework 76 is connected to the upper portion of the radiator framework 53 via a stay 92.

The dust cover frame 83 is erected on the right side of the radiator frame 53 on the body frame 1. The dust cover frame 83 is erected on the front bracket 90 and the rear bracket 91. The outer peripheral shape of the dust cover frame 83 is formed into a shape along the outer peripheral shape of the dust cover 18, and is formed into a shape slightly larger than the outer peripheral shape of the dust cover 18. The upper portion of the dust cover frame 83 is tapered upward in the same manner as the dust cover 18. The dust cover frame 83 constitutes a receiving surface for receiving the dust cover 18 from the lateral outside (right side) of the body. The dust cover frame 83 extends to a height position corresponding to the upper surface of the lateral frame 51.

The upper end of the dust cover frame 83 is connected to the right end of the lateral frame 51. A coupling bracket 93 fixed to the upper end of the dust cover frame 83 and a coupling bracket 94 fixed to the right end of the lateral frame 51 are fixed by bolts in a state where the coupling bracket 93 on the dust cover frame 83 side abuts against the coupling bracket 94 on the lateral frame 51 side from the right.

The dust cover frame 83 includes: a front longitudinal frame portion 95 constituting a front portion of the dust cover frame 83; a rear longitudinal frame portion 96 constituting a rear portion of the dust cover frame 83; an intermediate frame portion 97 spanning between upper and lower intermediate portions of the front longitudinal frame portion 95 and upper and lower intermediate portions of the rear longitudinal frame portion 96; and a lower frame portion 98 straddling lower ends of the front and rear

longitudinal frame portions

95 and 96. The upper end of the front longitudinal frame portion 95 is connected to the upper end of the rear longitudinal frame portion 96. The intermediate frame portion 97 is located at the same height position as that of the top plate 73.

The front vertical frame portion 95 is provided with a side wall portion 99 that is continuous with the engine hood 17 (the top plate 73 and the front outer wall 75) in a state of protruding forward from the front vertical frame portion 95. The front longitudinal frame portion 95 is provided with: an upper inclined portion 95a extending from an upper end portion of the front longitudinal frame portion 95 in a state of being inclined forward downward; and a lower inclined portion 95b extending from a lower end portion of the upper inclined portion 95a in a state of being inclined forward downward. The upper surface of the lateral frame 51 is continuous with the upward surface of the upper inclined portion 95a, and the upward surface of the upper inclined portion 95a is continuous with the upward surface of the lower inclined portion 95 b.

Here, the air cleaner 43 is disposed in a frame of the dust cover frame 83 on the upper side of the intermediate frame portion 97 in a side view. This allows a hand to be inserted into the air cleaner 43 from the lateral outside of the body with the dust cover 18 open, thereby facilitating maintenance of the air cleaner 43.

The first longitudinal frame 86 is provided upright on the body frame 1 behind the driver seat 37. Specifically, the first vertical frame 86 is erected on the body frame 1 at a position between the second vertical frame 87 and the dust cover frame 83 and closer to the dust cover frame 83. The first longitudinal frame 86 extends to a height position above the top plate 73. Specifically, the first longitudinal frame 86 extends to a height position slightly lower than the lower surface of the lateral frame 51. The lower end portion of the first longitudinal frame 86 is bolted to the machine body frame 1.

The upper end of the first vertical frame 86 is coupled to the lateral frame 51 via a coupling frame 100 extending forward from the upper end of the first vertical frame 86. The coupling bracket 101 fixed to the distal end portion of the coupling frame 100 and the coupling bracket 102 fixed to the lateral frame 51 are fixed by bolts in a state where the coupling bracket 101 on the coupling frame 100 side abuts against the coupling bracket 102 on the lateral frame 51 side from the left. An inclined frame 103 is provided to straddle the first longitudinal frame 86 and the linking frame 100 to link them.

The first longitudinal frame 86 supports the right portion of the rear portion of the engine hood 17. The coupling bracket 104 fixed to the vertically intermediate portion of the first vertical frame 86 and the coupling bracket 105 fixed to the right side portion of the rear portion of the hood framework 76 are fixed by bolts in a state where the coupling bracket 104 on the first vertical frame 86 side abuts against the coupling bracket 105 on the hood framework 76 side from behind.

The second vertical frame 87 is erected on the machine body frame 1 on the left of the rear portion of the side panel 39. A notch portion 49a is formed in the left side portion of the rear portion of the side panel frame 49 so as not to interfere with the second vertical frame 87. The second vertical frame 87 extends to a height position above the top plate 73. Specifically, the second longitudinal frame 87 extends to a height position corresponding to the lower surface of the lateral frame 51. The lower end portion of the second longitudinal frame 87 is bolted to the body frame 1.

The upper end of the second longitudinal frame 87 is coupled to the left end of the lateral frame 51. The coupling bracket 106 fixed to the upper end portion of the second vertical frame 87 and the coupling bracket 107 fixed to the left end portion of the lateral frame 51 are fixed by bolts in a state where the coupling bracket 106 on the second vertical frame 87 side abuts against the coupling bracket 107 on the lateral frame 51 side from the front.

The second longitudinal frame 87 supports the rear of the side panel 39. The coupling bracket 108 fixed to the upper and lower intermediate portions of the second vertical frame 87 and the upper surface portion of the side panel frame 49 are fixed by bolts in a state where the coupling bracket 109 on the second vertical frame 87 side abuts against the upper surface portion of the side panel frame 49 from above.

The second longitudinal frame 87 supports the left end portion of the rear portion of the engine hood 17. The coupling bracket 110 fixed to the vertical middle portion of the second vertical frame 87 and the coupling bracket 111 fixed to the left end portion of the hood framework 76 are fixed by bolts in a state where the coupling bracket 110 on the second vertical frame 87 side abuts against the coupling bracket 111 on the hood framework 76 side from the left.

The third longitudinal frame 88 is erected on the body frame 1 behind the second longitudinal frame 87. The third longitudinal frame 88 extends to a height position above the top plate 73. Specifically, the third vertical frame 88 extends to a height position above the upper surface of the lateral frame 51. The lower end portion of the third longitudinal frame 88 is bolted to the machine body frame 1. A strainer 112 for the engine E is supported by an upper end portion of the third vertical frame 88 via a support bracket 113.

The third longitudinal frame 88 is connected to the right side wall of the threshing device 10 via a connecting frame 114 extending leftward from the upper portion of the third longitudinal frame 88. The coupling bracket 115 is fixed to the left end portion of the coupling frame 114. The coupling bracket 115 is fixed by a bolt in a state of being abutted against the right side wall of the threshing device 10 from the right.

The second longitudinal frame 87 and the third longitudinal frame 88 are coupled via a coupling frame 116 extending in the machine body front-rear direction. The coupling brackets 117 are fixed to front and rear end portions of the coupling frame 116, respectively. The front coupling bracket 117 is fixed by a bolt in a state of coming into contact with a coupling bracket 118 fixed to the second vertical frame 87 from the rear. The rear coupling bracket 117 is fixed by bolts in a state of coming into contact with a coupling bracket 119 fixed to the coupling frame 114 from the front.

The fourth longitudinal frame 89 is provided upright below the right side portion of the rear portion of the side panel frame 49 on the body frame 1. The fourth vertical frame 8 extends to a height position above the top plate 73. Specifically, the fourth longitudinal frame 89 extends to a height position corresponding to the upper surface portion of the side panel frame 49. The fourth longitudinal frame 89 supports the right side portion of the rear portion of the side panel frame 49. The coupling bracket 120 fixed to the upper end of the fourth vertical frame 89 is fixed by bolts in a state of being in contact with the upper surface portion of the side panel frame 49 from below.

The fourth longitudinal frame 89 supports the left side portion of the rear portion of the hood 17. The coupling bracket 121 fixed to the upper portion of the fourth vertical frame 89 and the coupling bracket 122 fixed to the left side portion of the rear portion of the hood framework 76 are fixed by bolts in a state where the coupling bracket 121 on the fourth vertical frame 89 side abuts against the coupling bracket 122 on the hood framework 76 side from behind.

The transverse frame 51 is provided so as to straddle the dust cover frame 83, the first longitudinal frame 86, and the second longitudinal frame 87. The lateral frame 51 is formed of a square pipe. The lateral frame 51 is provided at a height position above the top plate 73 so as to straddle the dust cover frame 83, the first longitudinal frame 86, and the second longitudinal frame 87. Specifically, the lateral frame 51 is provided so as to straddle the dust cover frame 83, the first longitudinal frame 86, and the second longitudinal frame 87 at a height position corresponding to the upper end portion of the inclined wall portion 50. The lateral frame 51 is supported at its left and right ends by the second longitudinal frame 87 and the dust cover frame 83, respectively. The left and right intermediate portions of the lateral frame 51 (specifically, portions of the lateral frame 51 closer to the dust cover frame 83 than the left and right centers) are supported by the first vertical frame 86.

(carrying support structure of cab)

As shown in fig. 7, 11, and 12, a rear window 23 and a lateral frame 123 extending in the body right and left direction along the lower end portion of the rear sash 31 are provided on the rear wall 9A of the cab 9. The lower end portion of the rear wall 9A of the cab 9 (specifically, the lower surface of the lateral frame 123) is placed on and supported by the upper end surface of the rear wall 8A of the cab 8 (specifically, the upper surface of the lateral frame 51). A pad 124 is mounted on the lower surface of the lateral frame 123.

The lower end portion of the left side portion of the cab 9 is supported by the upward surface of the inclined wall portion 50 and the upper surface of the side panel frame 49. Specifically, the rear lower corner (oblique edge) of the left sash 29 is placed and supported on the upward surface of the oblique wall 50, and the lower edge of the left sash 29 is placed and supported on the upper surface of the side panel frame 49. A gasket 124 is attached to the lower surface of the beveled edge portion of the left side sash 29 and the lower surface of the lower edge portion of the left side sash 29.

A notch 50a having a shape matching the shape of the side panel frame 49 is formed in the lower left corner of the inclined wall 50. In a state where the side panel frame 49 enters the notch portion 50a, the upward surface of the inclined wall portion 50 is continuous with the upper surface of the side panel frame 49. The side panel frame 49, the inclined wall portion 50, the lateral frame 51, and the lateral frame 123 extend to the left side of the left side portion (the left window 22) of the cab 9. The left end position of the side panel frame 49, the left end position of the inclined wall portion 50, the left end position of the lateral frame 51, and the left end position of the lateral frame 123 are located at the same or substantially the same position.

The lower edge portion of the right side sash 33 is placed on the upward surface of the upper inclined portion 95a supported by the dust cover frame 83 (front vertical frame portion 95). A gasket (not shown) is attached to the lower surface of the lower edge portion of the right side sash 33.

The lower edge of door frame 27 is supported on the upper surface of the right end of plate 42. A gasket 124 is attached to the lower surface of the lower edge portion of the door frame 27. The lower portion (the inclined edge portion) of the rear portion of the door frame 27 is placed on the upward surface of the lower inclined portion 95b of the dust cover frame 83 (the front vertical frame portion 95). A gasket (not shown) is attached to the lower surface of the aforementioned bezel portion of the door frame 27.

The lower end portion of the right side portion of the front cover 40 is supported by the upper surface of the receiving plate 125 fixed to the body frame 1. The lower surface of the lower end portion of the right side portion of the front cover 40 is caulked (not shown).

(other embodiments)

(1) As shown in fig. 13, the body frame 1 is provided with: a pair of left and right main frames 1A extending in the front-rear direction of the machine body; a plurality of right and left direction frames 1B provided so as to straddle the left main frame 1A and the right main frame 1A, and extending in the right and left direction of the machine body; and a rear support frame 1C that is provided so as to straddle the left main frame 1A and the right main frame 1A, and supports the rear portions of the left and right crawler travel devices 2. The rear support frames 1C are located between the right and left facing frames 1B adjacent in the front-rear direction of the machine body. According to this structure, the right-left facing frame 1B is located away from the rigid portion (portion near the rear support frame 1C) in the body frame 1. Thus, a plate spring structure using the elastic force of the body frame 1 (main frame 1A) itself can be realized, and the impact force on the body frame 1 can be alleviated.

(2) In the above embodiment, the hood 17 is provided with the cover 78 that covers the inspection opening 74a in an openable and closable manner. However, the cover 78 is not limited to the structure of the above embodiment. For example, the cover 78 may have the structure shown in fig. 14. As shown in fig. 14, the cover 78 is formed of a substantially entire-sized plate material that covers the front wall 74. An inner lid 78a that enters the inspection port 74a is provided in a portion of the lid 78 corresponding to the inspection port 74 a. That is, the portion of the cover 78 corresponding to the inspection opening 74a is formed of a double wall. According to this structure, the lid 78, the inner lid 78a, and the front wall 74 form a double wall. This can suppress the influence of the hot air in the engine room ER being transmitted from the front wall 74 and the inspection opening 74a into the passenger space. Further, by covering substantially the entire front wall 74 with the cover 78, the design can be improved.

(3) As shown in fig. 15, a drone accommodating portion 127 that accommodates the drone 126 may be provided. The drone accommodating portion 127 is provided with a power supply device 127a that supplies power to the drone 126. Fig. 15 illustrates a plurality of places where the unmanned aerial vehicle accommodation unit 127 is provided. In the example shown in fig. 15, the unmanned aerial vehicle housing unit 127 is provided above the cab 9, the grain storage box 12, the threshing device 10, the conveyor 11, and the harvesting unit 3. The unmanned aerial vehicle housing section 127 may be provided at least one of the plurality of locations shown in fig. 15. Note that the location shown in fig. 15 is an example, and the location where the unmanned aerial vehicle storage unit 127 is installed is not limited to the location shown in fig. 15.

(4) In the combine harvester, it may be configured to be able to use a portable terminal (e.g., a smartphone, a tablet, a notebook, etc.) as an auxiliary display (e.g., a rear display that displays an image of a rear camera, a side display that displays an image of a side camera, etc.). Here, as a scheme for using the portable terminal as the auxiliary display, for example, the following scheme is conceivable.

Attaching the portable terminal to the combine harvester as an auxiliary display.

The portable terminal is directly connected to a camera (mounted on the combine) and used as an auxiliary display.

The portable terminal is connected to a camera (mounted on the combine) via a control device (mounted on the combine) and used as an auxiliary display. In this case, it may be configured to: when harvesting work is performed, crop and work information of a precision agriculture system are displayed on the portable terminal, when the machine body is retracted, the portable terminal is used as a rear display, and when grains are discharged by the grain discharging device, an image of a camera for shooting the grain discharging state is displayed on the portable terminal. The portable terminal may also have a function of operating an operation unit of the body.

(5) In the above embodiment, the top panel 73, the front wall 74, and the front outer wall 75 are configured to be integrally detachable with respect to the hood framework 76. However, the top panel 73, the front wall 74, and the front outer wall 75 may be configured to be detachable from the hood framework 76.

(6) In the above embodiment, the chamfered portion in the engine cover 17 is provided with the front outer wall 75 that closes the chamfered portion. However, the portion of the corner portion formed by the top plate 73 and the front wall 74 on the entrance 41 side may not be chamfered, and the front outer wall 75 may not be provided.

(7) In the above embodiment, the armrest 79 is provided on the front outer wall 75 in the hood 17. However, the armrest 79 may be provided in a detachable portion (the top plate 73 and the front wall 74) of the hood 17 other than the front outer wall 75. Alternatively, the armrest 79 may not be provided on the engine cover 17.

(8) In the above embodiment, the intermediate frame portion 97 straddles the front and rear

longitudinal frame portions

95, 96 at the same height position as that of the top plate 73. However, the intermediate frame portion 97 may straddle the front and rear

longitudinal frame portions

95, 96 at a height position above the top plate 73. Alternatively, the intermediate frame portion 97 may straddle the front and rear

longitudinal frame portions

95, 96 at a height position lower than the top plate 73. Alternatively, the dust cover frame 83 may not be provided with the intermediate frame portion 97.

(9) In the above embodiment, the cab frame 85 is provided with the third longitudinal frame 88 and the fourth longitudinal frame 89. However, the cab frame 85 may not be provided with the third vertical frame 88 and the fourth vertical frame 89.

(10) In the above embodiment, the upward surface of the inclined wall portion 50 is continuous with the upper surface of the side panel frame 49. However, the upward surface of the inclined wall portion 50 and the upper surface of the side panel frame 49 may be discontinuous.

(11) In the above embodiment, the inclined wall portion 50, the lateral frame 51, and the lateral frame 123 extend to the left side of the left side portion of the cab 9. However, the inclined wall portion 50, the lateral frame 51, and the lateral frame 123 may not extend to the left side of the left side portion of the cab 9.

(12) In the above embodiment, the inclined wall portion 50 is provided on the rear wall 8A of the cab portion 8. However, a vertical wall portion may be provided on the rear wall 8A of the cab portion 8 instead of the inclined wall portion 50.

(13) In the above embodiment, the cover 84 is provided to the dust cover 18, but the cover 84 may not be provided to the dust cover 18.

(14) In the above embodiment, the stopper portion 72a is provided in the sensor support 72, but the stopper portion 72a may not be provided in the sensor support 72.

The present invention is not limited to the above embodiment and the other embodiments, and various modifications other than the above embodiments can be made.

Industrial applicability

The invention can be used for a semi-feeding type combine harvester besides a full-feeding type combine harvester.

Description of the reference numerals

1 machine body frame

8 driving part

Rear wall of 8A cab

9 driver's cabin

Rear wall of 9A cab

10 threshing device

15 radiator

17 Engine cover

18 dust cover

21 lifting door

22 left side window (side window)

23 rear window

27 doorframe

29 left side window frame (Window frame)

37 driving seat

39 side panel

42 plate (floor part)

43 air filter

49 side panel frame

50 inclined wall (rear wall)

51 transverse frame

73 top plate

74 front wall

74a inspection port

75 front outer wall

78 cover

79 arm rest

83 dust cover frame (longitudinal frame)

85 driver's part frame

86 first longitudinal frame (middle longitudinal frame)

87 second longitudinal frame (longitudinal frame)

88 third longitudinal frame

95 front longitudinal frame section

95a Upper inclined part (inclined part)

95b inclined part (inclined part)

96 rear longitudinal frame section

97 intermediate frame section

98 lower frame part

112 coarse filter

E engine

ER engine room.

Claims

1. A combine harvester is characterized by comprising:

a driver part having a driver seat; and

a cab covering the cab portion,

the lower end portion of the rear wall of the cab is supported by the upper end surface of the rear wall of the cab.

2. A combine harvester according to claim 1,

the rear wall of the cab is provided with an inclined wall portion that is inclined downward toward the front,

the cab is placed on and supported by an upward surface of the inclined wall portion.

3. A combine harvester according to claim 2,

the driver part is provided with a side panel arranged on one side of the left and right direction of the machine body relative to the driver seat,

the cab is mounted on and supported by an upper surface of a side panel frame constituting the side panel,

the upward facing surface of the inclined wall portion is continuous with the upper surface of the side panel frame.

4. A combine harvester according to claim 3,

a side window is arranged on the side part of the side panel in the cab,

the lower end of the sash of the side window is supported by the upward surface of the inclined wall and the upper surface of the side panel frame.

5. A combine harvester according to claim 3 or 4,

the rear wall of the cab and the side panel frame extend to a position outside the cab.

6. A combine harvester according to any one of claims 1-5,

a transverse frame extending in the left and right direction of the machine body along the upper end part of the rear wall of the driving part,

the left and right ends of the transverse frame are respectively supported by a longitudinal frame vertically arranged on the machine body frame.

7. A combine harvester according to claim 6,

a rear window is arranged on the rear wall of the cab,

the lower end of the rear window is supported by the upper surface of the lateral frame.

8. A combine harvester according to claim 6 or 7,

a middle longitudinal frame is vertically arranged between the longitudinal frame on the left side and the longitudinal frame on the right side of the machine body frame,

the intermediate longitudinal frame supports the right and left intermediate portions of the lateral frame.

9. A combine harvester according to any one of claims 6 to 8,

a longitudinal frame located at a widthwise outer side of the machine body among the longitudinal frames on the left side and the longitudinal frames on the right side is provided with an inclined portion inclined forward and downward,

the cab is supported on the upward surface of the inclined portion.

10. A combine harvester according to claim 9,

an upper surface of the lateral frame is continuous with an upward surface of the inclined portion.

11. A combine harvester according to claim 9 or 10, comprising:

an engine room provided below the cab and accommodating an engine; and

a dust cover for covering a lateral side portion of the engine room on the outside of the machine body in a state of allowing ventilation and preventing dust from passing,

the outer peripheral shape of the vertical frame located on the outer side in the lateral direction of the machine body is formed into a shape along the outer peripheral shape of the dust cover, and the vertical frame constitutes a receiving surface that receives the dust cover from the outer side in the lateral direction of the machine body.

12. A combine harvester according to any one of claims 1-11,

a landing door is arranged on the lateral side of the machine body in the cab,

the lower end of the door frame of the landing door is placed on the floor supported by the driver.

13. A combine harvester is characterized by comprising:

a driver part having a driver seat;

an engine room provided below the cab and accommodating an engine;

an engine hood that supports the driver seat and separates a passenger space of the driver unit from the engine compartment;

a radiator that is provided in the engine room on a lateral outer side of the engine body with respect to the engine and radiates engine cooling water; and

a dust cover for covering the heat sink from the outside in the lateral direction of the body in a state allowing air to pass therethrough and in a state preventing dust from passing therethrough,

a dust cover frame is vertically arranged on the machine body frame, the dust cover frame forms a bearing surface for bearing the dust cover from the transverse outer side of the machine body,

the outer peripheral shape of the dust cover frame is formed in a shape that follows the outer peripheral shape of the dust cover, and the dust cover frame extends to a height position above the upper end of the engine hood.

14. A combine harvester according to claim 13,

the dust cover frame is provided with: a front longitudinal frame portion constituting a front portion of the dust cover frame; and a rear longitudinal frame portion constituting a rear side portion of the dust cover frame,

an upper end of the front longitudinal frame portion is coupled to an upper end of the rear longitudinal frame portion.

15. A combine harvester according to claim 14,

the dust cover frame is provided with: an intermediate frame portion that straddles the front and rear longitudinal frame portions at a height position that is the same as a height position of an upper end portion of the hood; and a lower frame portion straddling lower end portions of the front and rear longitudinal frame portions.

16. A combine harvester according to any one of claims 13 to 15,

a first longitudinal frame that supports a rear portion of the hood is provided upright on the body frame behind the steering section,

a transverse frame is provided across the dust cover frame and the first longitudinal frame.

17. A combine harvester according to claim 16,

the first longitudinal frame extends to a height position above an upper end of the hood,

the lateral frame is provided so as to straddle the dust cover frame and the first longitudinal frame at a height position above an upper end of the hood,

a rear wall is provided upright on an upper portion of the hood behind the driver seat,

the upper portion of the rear wall is supported by the lateral frame.

18. A combine harvester according to claim 16 or 17,

the driver part is provided with a side panel which is arranged on the side opposite to the dust cover frame in the left-right direction of the machine body relative to the driver seat,

a second longitudinal frame supporting the rear of the side panels is vertically arranged on the machine body frame,

the second longitudinal frame extends to a height position above the upper end of the hood,

the upper end of the second longitudinal frame is coupled to the lateral frame.

19. A combine harvester according to claim 18,

a third longitudinal frame is vertically arranged on the machine body frame behind the second longitudinal frame,

the third longitudinal frame is connected with the threshing device,

the second longitudinal frame is coupled to the third longitudinal frame.

20. A combine harvester according to claim 19,

a strainer for the engine is supported by the third longitudinal frame,

an air cleaner for the engine is provided behind the rear wall.

21. A combine harvester according to any one of claims 16 to 20,

a cab for covering the driving part is provided,

the cab is supported by the lateral frame.

22. A combine harvester according to any one of claims 13 to 21,

a cab for covering the driving part is provided,

the cab is supported by the dust cover frame.

23. A combine harvester is characterized by comprising:

a driver part having a driver seat;

an engine provided below the driver seat;

an engine cover having a top plate on which the driver seat is placed and supported and covering the engine; and

a cab frame vertically provided on the body frame and supporting the engine cover,

the driver seat and the roof panel are configured to be detachable with respect to the driver section frame.

24. A combine harvester according to claim 23,

the hood is provided with a front wall that straddles a front end portion of the roof panel and a rear end portion of the floor portion of the cab,

the front wall is configured to be detachable with respect to the cab frame.

25. A combine harvester according to claim 24,

a portion of the corner portion formed by the top plate and the front wall on the entrance side of the cab is formed to be chamfered,

the chamfered portion in the engine cover is provided with a front outer wall that blocks the chamfered portion,

the driver seat, the roof panel, the front wall, and the front outer wall are configured to be integrally detachable with respect to the driver section frame.

26. A combine harvester according to claim 25,

an armrest is provided on a removable portion of the hood.

27. A combine harvester according to any one of claims 24 to 26,

an inspection opening is formed at the front wall,

a cover for covering the inspection opening in an openable and closable manner,

the portion of the cover corresponding to the inspection opening is formed of a double wall.