JP2016036258A - Harvester - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a harvester comprising an exhaust pipe in a vertical direction, and a vertical supply pipe adjoining the exhaust pipe in a top plan view, and enabled to raise the intake port of the supply pipe while suppressing the suction of an exhaust gas by the air supply pipe.SOLUTION: By opening an exhaust port 40a of an exhaust pipe 40 upward at a position higher than an intake port 35a of an intake pipe 31, exhaust gas is discharged upward at a position higher than the intake port 35a of the intake pipe 31 so that the exhaust gas can be made harder to be sucked into the exhaust pipe 40 than a case, in which the exhaust gas is transversely discharged.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a vertical exhaust pipe for discharging and guiding exhaust gas from an engine, and a vertical air supply pipe that supplies combustion air to the engine and is arranged adjacent to the exhaust pipe in a plan view. Relates to a harvesting machine equipped with.

  Conventionally, for example, there has been a combine shown in Patent Document 1 as the harvesting machine. In this combine, an exhaust pipe and an intake pipe as an air supply pipe are provided. An exhaust gas discharge part as an exhaust port of the exhaust pipe is turned sideways.

JP2013-158254A

In the conventional case, the exhaust gas from the exhaust pipe tends to affect the air sucked into the supply pipe, or the intake port of the supply pipe tends to be lowered.
That is, when the exhaust gas flows out sideways from the exhaust pipe, the exhaust gas tends to be mixed into the air sucked into the air supply pipe. In order to suppress this exhaust gas mixture, it is necessary to increase the distance between the exhaust port of the exhaust pipe and the intake port of the air supply pipe, and it is necessary to prevent the exhaust pipe from projecting upward from the operating part or the like. Since there is a limit to the height at which the exhaust port can be disposed, the intake port of the air supply pipe is disposed at a low position.

  The objective of this invention is providing the harvester which can arrange | position the inlet of a supply pipe in a high position, making it difficult to mix exhaust gas into the air inhaled by a supply pipe.

The harvester according to the invention is
A vertical exhaust pipe that guides the exhaust gas from the engine,
A combustion air is supplied to the engine, and a vertical air supply pipe arranged adjacent to the exhaust pipe in a plan view is provided.
The exhaust port of the exhaust pipe opens upward at a position higher than the intake port of the air supply pipe.

  According to this configuration, exhaust gas from the exhaust pipe is discharged upward at a position higher than the intake port of the air supply pipe. Even if the distance between the mouth and the exhaust port becomes relatively short, the exhaust gas can be hardly sucked into the air supply pipe.

  Accordingly, it is possible to make it difficult for the dust to be sucked into the air supply pipe by arranging the suction port as high as possible while making it difficult for the exhaust gas to be sucked into the air supply pipe.

In the present invention,
A pre-air cleaner is provided at the upper end of the air supply pipe;
An air inlet of the pre-air cleaner is provided as the inlet;
It is preferable that the air supply pipe is located on the outer side of the airframe than the exhaust pipe.

  According to this configuration, the pre-air cleaner can be handled from the outside of the machine body without being damaged by the exhaust pipe, and the pre-air cleaner can be easily inspected and replaced.

In the present invention,
It is preferable that a cover that covers the exhaust pipe is provided between the pre-air cleaner and the exhaust pipe.

  According to this configuration, heat transfer from the exhaust pipe to the pre-air cleaner can be suppressed by the cover.

In the present invention,
It is preferable that the cover is configured to extend from a lower height position of the pre-air cleaner to an upper height position.

  According to this structure, the part which opposes the whole or substantially whole in the vertical direction of a pre air cleaner among exhaust pipes can be covered with a cover, and the heat transfer from an exhaust pipe to a pre air cleaner can be suppressed effectively.

In the present invention,
It is preferable that the cover is configured to extend from a position lower than the lower part of the pre-air cleaner to a position higher than the upper part.

  According to this configuration, not only the portion of the exhaust pipe that faces the whole of the pre-air cleaner in the vertical direction can be covered by the cover, but also the portion below the whole portion of the pre-air cleaner that faces the whole of the vertical direction. Both the portion and the portion above the entire portion of the pre-air cleaner facing the whole in the vertical direction can be covered with the cover, and heat transfer from the exhaust pipe to the pre-air cleaner can be more effectively suppressed.

In the present invention,
The cover is preferably supported by the exhaust pipe.

  According to this configuration, when performing work such as inspection or replacement of the pre-air cleaner, the cover can be quickly supported while being supported by the exhaust pipe.

In the present invention,
The cover is supported by the exhaust pipe of the cover so as to surround the exhaust pipe and a distance between a portion of the cover facing the pre-air cleaner and an outer peripheral surface of the exhaust pipe. It is preferable that the distance between the portion and the outer peripheral surface of the exhaust pipe is longer.

  According to this configuration, the portion of the cover that is supported by the exhaust pipe is supported by the exhaust pipe in a state of being closer to the exhaust pipe than the portion that faces the pre-air cleaner. The part of the cover that faces the pre-air cleaner can be further away from the exhaust pipe than the part that is supported by the exhaust pipe. Therefore, heat transfer from the exhaust pipe to the pre-air cleaner can be effectively suppressed while the cover is firmly supported by the exhaust pipe.

In the present invention,
The engine is supported by the fuselage frame;
The exhaust muffler of the engine is supported on the upper part of the engine,
It is preferable that the exhaust pipe extends from the exhaust muffler.

  According to this configuration, the ground height of the engine can be lowered by supporting the engine on the body frame. Since the exhaust muffler is supported on the upper part of the engine having a low ground height, the ground height of the exhaust muffler is not so high, and it is easy to perform work such as inspection of the exhaust muffler.

In the present invention,
It is preferable that a connecting portion that allows relative vibration between the exhaust muffler and the exhaust pipe is provided at a connection portion between the exhaust muffler and the exhaust pipe.

  According to this configuration, even if the exhaust muffler vibrates with the engine, vibration transmission from the exhaust muffler to the exhaust pipe is alleviated by the interchangeable portion, and the exhaust pipe can be protected from being easily cracked.

In the present invention,
It is preferable that an air cleaner that acts on combustion air supplied to the engine is provided in front of the exhaust muffler.

  According to this configuration, since the air cleaner is positioned in front of the exhaust muffler where the ground height is not so high as described above, the ground height of the air cleaner is not so high, and the air cleaner can be easily inspected and replaced.

In the present invention,
It is preferable that the exhaust pipe and the air supply pipe are supported by a rear portion of the operation cabin behind the operation cabin.

  According to this configuration, since the exhaust pipe and the air supply pipe are supported by the operation cabin having excellent strength in terms of function, vibrations of the exhaust pipe and the air supply pipe hardly occur.

In the present invention,
There is a work deck on the side of the driving cabin,
The air supply pipe is extended to a location near the rear end of the work deck in a plan view and higher than the work deck,
It is preferable that a pre-air liner is provided at the upper end of the air supply pipe.

  According to this configuration, the ground height of the pre-air cleaner can be increased so that the pre-air cleaner does not easily suck dust. The pre-cleaner can be easily handled from the work deck while increasing the ground height of the pre-air cleaner.

In the present invention,
A handrail surrounding the rear end of the work deck is provided,
It is preferable that the handrail is configured to pass between the air supply pipe and a rear end portion of the work deck.

  According to this configuration, by using the handrail as a support, it is easy to stand on the work deck and to work on the pre-air cleaner.

In the present invention,
The exhaust pipe and the air supply pipe are located between an operation cabin and a grain tank located behind the operation cabin,
It is preferable that a decorative cover for covering the space between the operation cabin and the grain tank is provided on the lateral sides of the exhaust pipe and the air supply pipe.

  According to this configuration, it is possible to make it difficult to attach dust to the exhaust pipe and the air supply pipe by a simple structure in which the decorative cover is provided with a dustproof function for the exhaust pipe and the air supply pipe.

In the present invention,
A work deck provided on a lateral side of the driving cabin, and a handrail surrounding a rear end of the work deck,
It is preferable that the decorative cover is supported by the handrail.

  According to this configuration, the decorative cover can be supported by a simple structure using a handrail as a support member.

In the present invention,
A pre-air cleaner is provided at the upper end of the air supply pipe;
It is preferable that the decorative cover covers at least a part of the outer side of the body of the pre-air cleaner in a side view of the body.

  According to this configuration, dust can be hardly sucked into the pre-air cleaner by a simple structure in which the decorative cover is provided with a dustproof function for the pre-air cleaner.

It is a side view which shows the whole combine. It is a top view which shows the whole combine. It is a side view which shows an air supply structure and an exhaust structure. It is a front view which shows an air supply structure, an exhaust structure, and a handrail. It is a top view which shows a decorative cover and a handrail. It is a perspective view which shows an air supply structure and an exhaust structure. It is a front view which shows an air supply pipe, a makeup | decoration cover, and a handrail. It is a side view which shows an air supply pipe and an air cleaner. It is a top view which shows the support structure of an air supply pipe | tube, an exhaust pipe, and a decorative cover. It is a perspective view which shows an air supply pipe, a handrail, and a decorative cover. It is a perspective view which shows an exhaust pipe, an exhaust muffler, and a cover. It is a side view which shows the support structure of an exhaust pipe and a cover. It is a top view which shows the support structure of a cover. It is sectional drawing which shows a pressure adjustment board. It is sectional drawing which shows the connection structure of an exhaust pipe and an exhaust muffler.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a side view showing an entire combine which is an example of a harvester according to an embodiment of the present invention. FIG. 2 is a plan view showing the entire combine which is an example of the harvester according to the embodiment of the present invention.

  As shown in FIGS. 1 and 2, a combine which is an example of a harvester according to an embodiment of the present invention is equipped with a pair of left and right front wheels 2 drivably mounted on the front part of the body frame 1, and the rear part of the body frame 1. The left and right rear wheels 3 are provided with a traveling machine body that can be steered. A driving unit 4 is provided at the front of the traveling machine body. A threshing device 5 and a grain tank 6 are provided at a site behind the driving unit 4 in the traveling machine body. A feeder 7 extends forward from the front of the threshing device 5 in a state of passing below the operation unit 4. A cutting portion 8 is connected to an extended end portion of the feeder 7. The reaping part 8 has a lowering work state in which the feeder 7 is swung up and down with respect to the threshing device 5 by the reaping lift cylinder 9 so that the Balincan type reaping device 8a is lowered near the field scene, The reaping device 8a is moved up and down over the non-working state in which the reaping device 8a is raised upward from the farm scene.

  An engine 10 is provided at a portion between the front wheel 2 and the rear wheel 3 in the traveling machine body. The engine 10 is configured to transmit the output of the engine 10 to the front wheel 2, the threshing device 5, the feeder 7 and the cutting unit 8.

The combine performs harvesting work such as rice and wheat by running the traveling machine body with the cutting unit 8 lowered to the lowered work state.
That is, the cutting unit 8 introduces the planted culm to be harvested among the planted cereals such as rice and wheat positioned in front of the traveling machine body to the inside of the harvesting unit 8 by a pair of left and right dividers 8b. The planted culm is cut by cutting the planted culm stock with the reaping device 8a. The feeder 7 supplies the whole of the harvested cereal cocoons from the cutting part 8 to the threshing device 5. The threshing device 5 threshes the harvested cereal by a barrel (not shown) that is rotationally driven, and supplies the grain obtained by the threshing process to the grain tank 6.

  The grain tank 6 is supported by a pair of front and rear support portions 11 so as to swing up and down around a traveling machine body front-rear lift axis P provided at a position near the right end in the lateral direction of the traveling machine body. The grain tank 6 is swing-operated by a tank lifting cylinder 12 between a lowered storage posture in a state where the grain tank 6 is lowered above the threshing device 5 and an elevated discharge posture in a state where the grain tank 6 is raised with respect to the threshing device 5. The pair of front and rear support portions 11 are provided on an upper portion of a tank support frame portion 13 erected on the body frame 1. The tank support frame portion 13 is provided on the lateral side of the threshing device 5. The tank support frame portion 13 includes a plurality of support frames arranged in the front-rear direction of the traveling machine body, and a beam frame facing the front-rear direction of the traveling machine body connected to the plurality of support frames.

  That is, the grain from the threshing device 5 can be recovered and stored in the grain tank 6 by setting the grain tank 6 in the lowered storage posture. By operating the grain tank 6 in the upward discharge posture, the grains stored in the grain tank 6 are discharged from the discharge port 6a (see FIG. 1) provided at the right end of the grain tank 6 to the right outer side of the body. It can be discharged by natural spills. On the right end side of the grain tank 6, a guide chute 14 that guides the grain from the discharge port 6 a to drop outward to the lateral side of the machine body is equipped so as to be able to swing up and down between the ascending storage posture and the descending use posture. The discharge port 6a is closed by the guide chute 14 when the guide chute 14 is switched to the upward retracted posture, and is opened when the guide chute 14 is switched to the lowered use posture.

The driving unit 4 will be described.
As shown in FIGS. 1 and 2, the driving unit 4 includes a driving cabin 20 that covers the living space, a deck 21 provided on the left side of the driving cabin 20, and a work provided on the right side of the driving cabin 20. A deck 22 is provided. The deck 21 can be used for operations such as getting on and off the driving unit 4 and checking the grain tank 6 and the threshing device 5. The work deck 22 can be used for work such as grain discharge from the grain tank 6.

  A handrail 23 is provided on the front end side of the deck 21. On the rear end side of the deck 21, a handrail 24 and a stair step 25 for getting on and off are provided. A handrail 26 is provided on the front end side of the work deck 22. A handrail 27 is provided on the rear end side of the work deck 22. The handrail 23 and the handrail 26 on the front end side can be used for adjusting the angle of the side mirror 66. The handrail 24 on the rear end side can be used for checking the grain tank 6 and the threshing device 5. The handrail 27 on the rear end side can be used for the operation of the grain tank 6 or the like.

  As shown in FIGS. 3 and 4, the lower end side of the handrail 27 located on the rear end side of the work deck 22 is connected to a support portion provided on the lateral side of the work deck 22 on the lateral side of the machine body. The handrail 27 located on the rear end side of the work deck 22 includes a lower portion that protrudes laterally outward from the portion connected to the support portion of the work deck 22, and an upper portion of the lower portion from the projecting end portion of the lower portion. A vertical portion 27a in a state of extending vertically to the direction, an inclined portion 27b in a state of extending from the extended end portion of the vertical portion 27a toward the rear of the body and upward in the body, and the inclined portion 27b. And an upper sideways portion 27c in a state of extending inwardly from the side of the fuselage. The extending end portion of the upper lateral portion 27 c is connected to the rear portion of the operation cabin 20. An attachment arm portion 27d extends from the portion near the upper end of the vertical portion 27a toward the rear of the machine body, and the extension end side of the attachment arm portion 27d is connected to the rear portion of the operation cabin 20.

  A handrail 27 located on the rear end side of the work deck 22 surrounds the rear end side of the work deck 22. Specifically, the handrail 27 surrounds the rear end side of the work deck 22 by the vertical portion 27a, the inclined portion 27b, the upper horizontal portion 27c, and the mounting arm portion 27d.

  As shown in FIGS. 1 and 3, the engine 10 is supported by the body frame 1. Specifically, the engine 10 is supported by a portion near the right lateral end of the body frame 1 on the right lateral side of the threshing device 5. The engine 10 is configured to cover the lateral side of the body of the engine 10 with a side cover 30. The side cover 30 is supported by the tank support frame portion 13 via a hinge member provided on the upper end side. That is, the side cover 30 can swing up and down up and down as an opening / closing axis A that extends in the front-rear direction of the traveling machine body.

  As shown in FIGS. 3, 4, and 6, the combustion air is supplied to the engine 10 by a vertical air supply pipe 31. Specifically, the air supply structure is configured as follows.

  An intake portion 10 a is provided in the upper part of the front end side of the engine 10. The intake portion 10 a and the exhaust portion of the air cleaner 32 are connected via an intake duct 33. The lower end side of the air supply pipe 31 is connected to the intake cylinder portion 32 a of the air cleaner 32 via the intake duct 34. A pre-air cleaner 35 is provided at the upper end of the air supply pipe 31. An air introduction port 35 a of the pre-air cleaner 35 is an intake port of the air supply pipe 31.

  That is, the air around the pre-air cleaner 35 is sucked into the pre-air cleaner 35 by the suction force applied by the engine 10. The air that has undergone the dust removal process in the pre-air cleaner 35 is sucked into the air cleaner 32 through the air supply pipe 31 and the intake duct 34. The air from which the dust has been removed in the air cleaner 32 is taken into the engine 10 through the intake duct 33 as combustion air.

  As shown in FIGS. 3, 4, and 6, the exhaust gas of the engine 10 is discharged by a vertically oriented exhaust pipe 40. Specifically, the exhaust structure is configured as follows.

  An exhaust unit 10 b is provided in the upper part of the front end side of the engine 10. The introduction cylinder part 41a of the exhaust muffler 41 is connected to the exhaust part 10b. An exhaust pipe 40 extends from the discharge cylinder portion 41 b of the exhaust muffler 41.

  That is, the exhaust gas generated in the engine 10 flows into the exhaust muffler 41 through the exhaust part 10b and the introduction cylinder part 41a. The exhaust gas that has been silenced in the exhaust muffler 41 is discharged from the discharge cylinder portion 41 b and flows into the exhaust pipe 40. The exhaust gas flowing into the exhaust pipe 40 is guided by the exhaust pipe 40 to the exhaust port 40a and discharged from the exhaust port 40a.

  As shown in FIGS. 11 and 15, a pressure adjusting plate 42 is provided at a connection location between the exhaust part 10 b and the introduction cylinder part 41 a. The pressure adjusting plate 42 is disposed between the flange portion 10f provided in the exhaust portion 10b and the flange portion 41f provided in the introduction tube portion 41a, and is attached to each flange portion 41f, 10f by the tightening force of the connecting bolt 43. It is in pressure contact.

  The pressure adjusting plate 42 is provided with a communication hole 42a that allows communication between the exhaust gas passage 10R provided in the exhaust portion 10b and the exhaust gas passage 4R provided in the introduction cylinder portion 41a. The hole diameter of the communication hole 42a is formed smaller than the diameter of the exhaust gas passage 10R of the exhaust part 10b and smaller than the diameter of the exhaust gas passage 41R of the introduction cylinder part 41a. The pressure adjusting plate 42 adjusts the pressure so as to increase the pressure of the exhaust gas on the engine side due to the difference in diameter between the communication hole 42a and the exhaust gas passage 10R.

  A connecting portion 45 that allows relative vibration between the exhaust muffler 41 and the exhaust pipe 40 is provided at a connection portion between the exhaust muffler 41 and the exhaust pipe 40. Specifically, the connection structure between the exhaust muffler 41 and the exhaust pipe 40 and the interchangeable portion 45 are configured as shown in FIGS.

  The exhaust pipe 40 is provided with a connection pipe portion 40 b extending from the lower end portion toward the exhaust muffler 41. The connecting pipe part 40 b is connected to the discharge cylinder part 41 b of the exhaust muffler 41. Specifically, the connection between the connecting pipe portion 40b and the discharge cylinder portion 41b is as follows. That is, the extended end portion 40c of the connecting pipe portion 40b is placed outside the end portion of the discharge cylinder portion 41b. The connecting pipe part 40b is configured such that a gap S is formed over the entire circumference of the discharge cylinder part 41b between the extended end part 40c and the discharge cylinder part 41b. The interchangeable portion 45 is constituted by the gap S.

  The exhaust muffler 41 is supported on the upper part of the engine 10. Specifically, the exhaust muffler 41 is supported by the engine 10 as shown in FIG.

  By connecting the introduction cylinder part 41 a of the exhaust muffler 41 and the exhaust part 10 b provided at the upper part of the front end side of the engine 10, one end side of the exhaust muffler 41 is supported by the upper part of the engine 10. A mounting member 41c extends downward from an end portion of the exhaust muffler 41 opposite to the side including the introduction cylinder portion 41a. A support member 46 extends upward from the rear end of the engine 10. Since the attachment member 41 c and the support member 46 are connected by the connecting bolt, the other end side of the exhaust muffler 41 is supported by the upper part of the engine 10.

  As shown in FIGS. 3 and 5, the air supply pipe 31 and the exhaust pipe 40 are arranged so as to be adjacent in a plan view. The exhaust pipe 40 is configured to open upward at a position where the exhaust port 40 a is higher than the air introduction port 35 a of the pre-air cleaner 35 as the suction port of the air supply pipe 31.

  The exhaust pipe 40 is configured so that exhaust gas is discharged upward at a position higher than the air inlet 35a serving as the inlet of the air supply pipe 31, and the air supply pipe 31 and the exhaust pipe 40 are adjacent to each other in plan view. Thus, it is possible to secure an empty space around the air supply pipe 31 and the exhaust pipe 40, while making it difficult for the exhaust gas from the exhaust pipe 40 to be sucked into the air supply pipe 31.

  The air supply pipe 31 and the exhaust pipe 40 are disposed between the operation cabin 20 and the grain tank 6 and are supported by the rear portion of the operation cabin 20. Specifically, the supply pipe 31 and the exhaust pipe 40 are supported by the operation cabin 20 by the support structure shown in FIGS.

  A connecting member 48 extends forward from two locations on the upper end side and the lower end side of the air supply pipe 31. The extending end of each connecting member 48 is connected to a cabin frame 49 provided at the rear of the operation cabin 20. The upper horizontal portion 27c of the handrail 27 is configured to be connected to the upper connecting member 48 by a connecting bolt. The attachment arm portion 27d of the handrail 27 is connected to the lower connection member 48 by a connection bolt. The upper connecting member 48 and the lower connecting member 48 are members that support the upper end side of the handrail 27 on the operating unit 4.

  Connecting members 50 are provided at two locations on the upper end side and the lower end side of the exhaust pipe 40. Each connecting member 50 is distributed to a pair of upper and lower support members 51 provided on the cabin frame 49 of the operation cabin 20 and connected by connecting bolts.

  As shown in FIGS. 5 and 10, a handrail 27 located on the rear end side of the work deck 22 passes between the air supply pipe 31 and the rear end portion of the work deck 22. Specifically, the handrail 27 is configured so that the upper lateral portion 27c and the mounting arm portion 27d of the handrail 27 pass between the air supply pipe 31 and the rear end portion of the work deck 22 in the lateral direction of the machine body. Yes.

As shown in FIGS. 4 and 5, the air supply pipe 31 is disposed on the outer side of the machine body with respect to the exhaust pipe 40. The air supply pipe 31 extends in the vicinity of the rear end portion of the work deck 22 in a plan view and higher than the work deck 22.
That is, the pre-air cleaner 35 provided at the upper end portion of the air supply pipe 31 is configured to be located at a place where it can be easily handled from the work deck 22.

  As shown in FIG. 3, the air cleaner 32 is supported by the stay 52 in front of the exhaust muffler 41. Since the exhaust muffler 41 is supported by the upper part of the engine 10 that is lowered by the support to the body frame 1, the mounting height of the exhaust muffler 41 is an easy-to-handle mounting height. Thereby, the mounting height of the air cleaner 32 is also easy to handle, and the air cleaner 32 can be easily inspected and replaced. The stay 52 extends forward from a member 13 a located at the front end of the tank support frame 13.

  As shown in FIG. 10, the air cleaner 32 is provided at a main body provided with an exhaust part and an intake cylinder part 32 a and an end part of the main body opposite to a side where the exhaust part and the intake cylinder part 32 a are located. And an open / close lid 32b. The air cleaner 32 is supported in an attachment posture in which the opening / closing lid 32b is located on the laterally outer side of the body from the main body.

  As shown in FIG. 1, the air cleaner 32 is supported at a position lower than the opening / closing axis A of the side cover 30. That is, when the side cover 30 is in the upwardly open state, the side cover 30 is positioned away from the air cleaner 32 upward.

  Therefore, the work of inspecting and exchanging the air cleaner 32 from the lateral side of the airframe can be easily performed without being affected by the side cover 30 and easily reaching the air cleaner 32.

  As shown in FIGS. 3 and 6, a cover 53 that covers the exhaust pipe 40 is provided between the pre-air cleaner 35 and the exhaust pipe 40, and heat transfer from the exhaust pipe 40 to the pre-air cleaner 35 is suppressed by the cover 53. Has been.

  As shown in FIG. 7, the pre-air cleaner 35 includes a main body 35A, a lower portion 35D that protrudes downward from the main body 35A, is attached to and detached from the air supply pipe 31, and an upper portion that is attached to the upper end side of the main body 35A so as to be opened and closed. 35U. As shown in FIG. 3, the cover 53 is configured to extend from the height position of the lower portion 35 </ b> D of the pre-air cleaner 35 to the height position of the upper portion 35 </ b> U. Furthermore, the cover 53 is configured to extend from a position 53D lower than the lower portion 35D of the pre-air cleaner 35 to a position 53U higher than the upper portion 35U.

  The cover 53 is supported by the exhaust pipe 40. Specifically, the cover 53 is supported on the exhaust pipe 40 by the mounting structure shown in FIGS.

  The cover 53 is U-shaped in plan view and is configured to surround the exhaust pipe 40. The cover 53 is provided with a notch hole 54 through which the upper connecting member 50 for connecting the exhaust pipe 40 to the operating unit 4 is inserted. The cover 53 is formed with ventilation holes 53a arranged in the vertical direction and the circumferential direction.

  A pair of support portions 55 arranged in the circumferential direction of the exhaust pipe 40 are provided on the outer peripheral portion of the exhaust pipe 40 at each of the upper and lower portions of the exhaust pipe 40. The cover 53 is tightened and connected to each support portion 55 by a connecting bolt 56 that is mounted across the cover 53 and the support portion 55.

  When the cover 53 is supported by the exhaust pipe 40, the distance between the portion 53P of the cover 53 facing the pre-air cleaner 35 and the outer peripheral surface of the exhaust pipe 40 is X, and the portion of the cover 53 supported by the exhaust pipe 40 The cover is formed such that a gap in which the distance between 53H and the outer peripheral surface of the exhaust pipe 40 is Y is formed between the cover 53 and the exhaust pipe 40, and the distance X is longer than the distance Y. 53 is configured.

  The cover 53 is securely connected to the exhaust pipe 40 by a short connection distance. Heat transfer from the exhaust pipe 40 to the pre-air cleaner 35 is effectively suppressed by a long distance between the portion 53P of the cover 53 facing the pre-air cleaner 35 and the outer peripheral surface of the exhaust pipe.

As shown in FIGS. 1 and 5, a decorative cover 58 that covers the space between the operation cabin 20 and the grain tank 6 is provided on the lateral sides of the air supply pipe 31 and the exhaust pipe 40. The decorative cover 58 is configured to cover a part of the outer side of the body of the pre-air cleaner 35. Specifically, the upper end 58U on the front end side of the decorative cover 58 overlaps the pre-air cleaner 35 in a side view of the body.
That is, the decorative cover 58 is configured to have a dustproof function for the exhaust pipe 40, the air supply pipe 31, and the pre-air cleaner 35.

  The decorative cover 58 is supported by a handrail 27 located on the rear side of the work deck 22. Specifically, the decorative cover 58 is supported by the handrail 27 by the support structure shown in FIGS.

  The decorative cover 58 includes a vertical plate portion 58a positioned along the longitudinal direction of the fuselage between the driving cabin 20 and the grain tank 6, and a horizontal plate portion 58b extending inward from the front end of the vertical plate portion 58a. And. Reinforcing members 59 and 60 are provided at the upper end side portion, the middle portion, and the lower end side portion on the back side of the decorative cover 58, respectively. The reinforcing member 59 on the upper end side and the lower end side is connected across the airframe lateral inner end portion of the horizontal plate portion 58b and the rear end portion of the vertical plate portion 58a, and is provided in a state inclined with respect to the longitudinal direction of the airframe. Yes. The reinforcing member 60 at the intermediate location is provided in a state of being connected to the back surface of the vertical plate portion 58a over the entire length.

  A pair of left and right support members 61 extend rearward from the mounting arm portion 27d of the handrail 27 located on the rear end side of the work deck 22. A plate-like support base 62 is provided on the upper lateral portion 27 c of the handrail 27 located on the rear end side of the work deck 22. The upper end side of the horizontal plate portion 58b is connected to the rear end side of the support base 62 by a connecting bolt. The lower end side of the horizontal plate portion 58b is connected to a pair of left and right support members 61 by connecting bolts.

  The support table 62 supports the operation box 63 for the grain tank 6. The operation box 63 accommodates an operation switch for swinging the grain tank 6. The operation switch is configured to operate the control valve of the tank lifting cylinder 12.

[Another embodiment]
(1) In the above-described embodiment, an example in which the pre-air cleaner 35 is provided in the air supply pipe 31 has been shown. However, the pre-air cleaner 35 may be omitted.

(2) In the above-described embodiment, the example in which the air supply pipe 31 is located on the outer side of the airframe from the exhaust pipe 40 has been shown. However, the air supply pipe 31 may be configured to be located on the inner side of the airframe from the exhaust pipe 40. .

(3) In the above-described embodiment, the example in which the cover 53 is supported by the exhaust pipe 40 has been described. However, the cover 53 is configured to be supported by the air supply pipe 31 or a member other than the air supply pipe 31. May be.

(4) In the above-described embodiment, an example in which a cover having a configuration that surrounds the exhaust pipe 40 has been shown, but a cover having various shapes such as a flat plate shape that does not surround the exhaust pipe 40 is employed. May be.

(5) In the above-described embodiment, the example in which the interchangeable portion 45 is provided at the connection portion between the exhaust pipe 40 and the exhaust muffler 41 is shown, but the embodiment may be implemented without providing the interchangeable portion 45.

(6) In the above-described embodiment, an example in which the gap S is adopted as the interchangeable portion 45 is shown. However, a configuration that allows relative vibration while connecting the exhaust pipe 40 and the exhaust muffler 41 such as a rubber pipe is adopted. You may implement.

(7) In the above-described embodiment, the example in which the decorative cover 58 is configured to cover a part of the outer body portion of the pre-air cleaner 35 has been shown. Good.

(8) In the above-described embodiment, an example in which the work deck 22, the handrail 27, and the decorative cover 58 are provided has been described, but the work deck 22, the handrail 27, and the decorative cover 58 are not provided in whole or in part. May be.

  The present invention is applicable to a combine equipped with a crawler traveling device instead of a wheel. It can be used for a combine equipped with a self-removing type threshing device instead of a full-throwing type threshing device. Instead of rice and wheat, it can be used in a harvester that harvests various crops such as soybean, buckwheat, and corn.

1 Airframe Frame 10 Engine 20 Operating Cabin 22 Work Deck 31 Air Supply Pipe 32 Air Cleaner 35a Suction Port (Air Inlet)
35D Lower part of pre-air cleaner 35U Upper part of pre-air cleaner 40 Exhaust pipe 40a Exhaust port 41 Exhaust muffler 45 Fusing part 53 Cover 53P Part facing pre-air cleaner 53H Supported part 58 Cosmetic cover

Claims (16)

A vertical exhaust pipe that guides the exhaust gas from the engine,
A combustion air is supplied to the engine, and a vertical air supply pipe arranged adjacent to the exhaust pipe in a plan view is provided.
The harvesting machine in which the exhaust port of the exhaust pipe opens upward at a position higher than the intake port of the supply pipe. A pre-air cleaner is provided at the upper end of the air supply pipe;
An air inlet of the pre-air cleaner is provided as the inlet;
The harvester according to claim 1, wherein the air supply pipe is located outside the airframe from the exhaust pipe.   The harvester according to claim 2, wherein a cover that covers the exhaust pipe is provided between the pre-air cleaner and the exhaust pipe.   The harvesting machine according to claim 3, wherein the cover is configured to extend from a lower height position of the pre-air cleaner to an upper height position.   The harvesting machine according to claim 4, wherein the cover is configured to extend from a position lower than a lower part of the pre-air cleaner to a position higher than an upper part.   The harvester according to any one of claims 3 to 5, wherein the cover is supported by the exhaust pipe.   The cover is supported by the exhaust pipe in the cover so as to surround the exhaust pipe and a distance between a portion of the cover facing the pre-air cleaner and an outer peripheral surface of the exhaust pipe. The harvester according to claim 6, wherein the harvester is configured to be longer than a distance between the portion and the outer peripheral surface of the exhaust pipe. The engine is supported by the fuselage frame;
The exhaust muffler of the engine is supported on the upper part of the engine,
The harvester according to any one of claims 1 to 7, wherein the exhaust pipe extends from the exhaust muffler.   The harvester according to claim 8, wherein a connecting portion that allows relative vibration between the exhaust muffler and the exhaust pipe is provided at a connection portion between the exhaust muffler and the exhaust pipe.   The harvester according to claim 9, wherein an air cleaner that acts on combustion air supplied to the engine is provided in front of the exhaust muffler.   The harvester according to any one of claims 1 to 10, wherein the exhaust pipe and the air supply pipe are supported by a rear portion of the operation cabin at the rear of the operation cabin. There is a work deck on the side of the driving cabin,
The air supply pipe is extended to a location near the rear end of the work deck in a plan view and higher than the work deck,
The harvester according to any one of claims 1 to 11, wherein a pre-air liner is provided at an upper end portion of the air supply pipe. A handrail surrounding the rear end of the work deck is provided,
The harvester according to claim 12, wherein the handrail is configured to pass between the air supply pipe and a rear end portion of the work deck. The exhaust pipe and the air supply pipe are located between an operation cabin and a grain tank located behind the operation cabin,
The harvester as described in any one of Claims 1-13 with which the decorative cover which covers between the said operation cabin and the said grain tank is provided in the machine body lateral side of the said exhaust pipe and the said supply pipe. A work deck provided on a lateral side of the driving cabin, and a handrail surrounding a rear end of the work deck,
The harvesting machine according to claim 14, wherein the decorative cover is supported by the handrail. A pre-air cleaner is provided at the upper end of the air supply pipe;
The harvesting machine according to claim 15, wherein the decorative cover covers at least a part of a body outer side portion of the pre-air cleaner in a side view of the body.

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