CN219660398U - Combine harvester - Google Patents

Abstract

The present utility model provides a combine harvester, which is provided with a fuel tank cover for facilitating maintenance operation of a fuel tank, and is characterized in that the combine harvester comprises: an engine (E); and a fuel tank (13) that communicates with the engine (E), wherein a detachable fuel tank cover (34) that protects the fuel tank (13) is provided below the fuel tank (13), and wherein the fuel tank cover (34) includes: a left cover (34 a) for protecting the left lower part of the fuel tank (13); and a right cover (34 c) for protecting the right lower part of the fuel tank (13).

Description

Combine harvester

Technical Field

The present utility model relates to a combine harvester including a fuel tank and a fuel tank cover for protecting the fuel tank.

Background

In the technique disclosed in patent document 1, a horizontally long fuel tank is mounted at the rear of a machine table on which a threshing part is mounted. The fuel tank needs to be removed upward of the frame, and the threshing portion needs to be removed in advance when the fuel tank is attached and detached.

Prior art literature

Patent literature

Patent document 1: japanese patent application laid-open No. 2019-170244

Disclosure of Invention

Problems to be solved by the utility model

In the prior art, in order to detach the fuel tank in the upward direction, the threshing portion needs to be detached every time, and in maintenance of the fuel tank, the threshing portion needs to be detached, and a large amount of work needs to be performed.

In contrast, the present utility model provides a combine harvester in which a cover provided on the lower side of a fuel tank is removed downward, and thus maintenance of the fuel tank can be performed easily from below without detaching the fuel tank.

Means for solving the problems

The present utility model adopts the following means to solve the above problems.

The aspect 1 is a combine harvester, comprising: an engine E; a fuel tank 13 connected to the engine E,

a detachable fuel tank cover 34 for protecting the fuel tank 13 is provided below the fuel tank 13, and the fuel tank cover 34 includes: a left cover 34a for protecting the left lower part of the fuel tank 13; and a right cover 34c for protecting the right lower portion of the fuel tank 13.

The combine according to claim 1, wherein the fuel tank 13 is supported from below by a support member 33, and the left cover 34a is integrally formed with the support member 33.

The combine harvester according to claim 1, wherein the right cover 34c is configured to be connectable to the support member 33, and is configured to be supported by the support member 33 when connected.

The combine harvester according to claim 2 is characterized in that the right cover 34c is configured to be connectable to the support member 33, and is configured to be supported by the support member 33 when connected.

Effects of the utility model

According to the present utility model described in claim 1, the left and right covers of the fuel tank cover 34 can be separately attached and detached, and therefore, the left and right covers 34a and 34c can be selectively detached as needed, and the attached and detached covers are divided into small parts from left to right, so that the attaching and detaching work, the transportation, and the like can be easily performed, and the attaching and detaching can be easily performed even in a small maintenance space.

According to the present utility model described in claim 2, the support member 33 and the left cover 34a are integrated, so that the left cover 34a can be firmly supported, and the support member 33 and the left cover 34a supporting the fuel tank 13 can be attached and detached at one time, so that the man-hours required for attaching and detaching the fuel tank 13 and the fuel tank cover 34 can be reduced, and the fuel tank 13 can be attached and detached from below.

According to the present utility model described in claim 3 or 4, the right cover 34c is assembled to the support member 33, whereby the right cover 34c can be stably attached and the right cover 34c can be separately attached and detached, and therefore maintenance work of the fuel tank 13 is facilitated while the fuel tank 13 is kept supported.

Drawings

Fig. 1 is a side view of the combine harvester of the present utility model.

Fig. 2 is a front view of the combine harvester.

Fig. 3 is a side view of the main part of the combine harvester.

Fig. 4 is a plan view of the main part of the combine harvester.

Fig. 5 is a perspective view of the main part of the combine harvester.

Fig. 6 is a rear view of the main part of the combine harvester.

Fig. 7 is a plan view of the main part of the combine harvester.

Fig. 8 is a side view showing a fixed state of the fuel tank of the combine harvester.

Fig. 9 is a perspective view of the main part of the combine harvester.

Fig. 10 is a perspective view of the main part of the combine harvester.

Fig. 11 is a plan view of the main part of the combine harvester.

Fig. 12 is a rear view of the combine harvester.

Fig. 13 is a perspective view of the main part of the combine harvester.

Fig. 14 is a perspective view of the main part of the combine harvester.

Fig. 15 is a perspective view of the main part of the combine harvester.

Fig. 16 is a perspective view of the main part of the combine harvester.

Fig. 17 is a perspective view of the main part of the combine harvester.

Fig. 18 is a perspective view of a main part of a fuel tank cover of the combine harvester.

Fig. 19 is a perspective view of the main part of the combine harvester.

Fig. 20 is a rear view of the main part of the combine harvester.

Fig. 21 is a schematic view of the fuel path of the combine harvester.

Fig. 22 is a side view of the main part of the exhaust gas purifying device of the combine harvester.

Fig. 23 is a side view of the tail pipe of the combine harvester.

Fig. 24 is a rear view of the tail pipe of the combine harvester.

Fig. 25 is a front view of the main part of the combine harvester.

In the figure:

e-engine, 4-threshing part, 10-grain box, 13-fuel tank, 14-machine body, 16-frame, 18-receiving part, 19-suction hose, 20-return hose, 23-locking bolt, 31-right main frame, 32-left main frame, 33-supporting component, 34-fuel tank cover, 34 a-left outer cover, 34 b-left inner cover, 34 c-right cover, 40-gearbox.

Detailed Description

The present utility model will be described based on the drawings.

Fig. 1 and 2 show a self-threshing combine harvester, in which a pair of left and right travel tracks 2 are provided below a vehicle body 1, and a threshing unit (threshing device) 4 for threshing a harvesting grain bar while being fed by a feed chain 3 is mounted on the left side of the vehicle body 1.

As shown in fig. 20, the threshing section 4 includes an upper treatment chamber and a lower screening section, and a treatment cylinder 4a is axially mounted in the treatment chamber.

In addition, a second processing chamber is provided in the processing chamber, and a second processing cylinder is axially installed in the second processing chamber.

Further, the rear portion of the second treatment cylinder is a dust discharge treatment cylinder 4b.

As shown in fig. 19, a screening unit for air-separating grains and foreign matter by air-blowing of an air separator is formed below the processing chamber, and a swing frame 4c that swings back and forth in the air-blowing direction (front-rear direction) of the air separator is provided in the screening unit.

The swing frame 4c includes a first spiral portion at a predetermined position below the swing frame, and a second spiral portion at a rear side of the first spiral portion.

Grains are conveyed from the first screw portion to the first cereal lifting cylinder 41, and contents are conveyed from the second screw portion to the second cereal lifting cylinder 42.

The harvester 7 includes a lifting device 5 for lifting up the coarse and short grain stalks, a harvesting blade device 6 for harvesting the lifted grain stalks, a lifting device for lifting up and conveying the harvested grain stalks, and the like, and a driving operation unit including an operation box 8, a driver seat 9, and the like is mounted on the right side of the vehicle body 1 on the lateral side of the harvester 7, and a grain box 10 for temporarily storing the grains is mounted on the lateral side of the harvester 4 on the rear side of the driving operation unit.

When the cereal box 10 is filled with cereal grains, the cereal grains are discharged to a predetermined location outside by a discharge auger 12 which is vertically movable up and down and horizontally rotatable with respect to a discharge cereal lifting cylinder 11 provided at the rear of the cereal box 10.

An engine room ER is provided below the driver seat 9, and an engine E as a power source for transmitting power to each part of the combine is mounted in the engine room ER.

The transmission that transmits the power of the engine E to the running device is built in the transmission case 40.

Although not shown, the transmission has a drive transmission shaft for transmitting power of the engine E in the left-right direction, and the drive transmission shaft protrudes toward the left and right sides of the transmission case 40.

Drive sprockets are provided at the left and right ends of the drive shaft, and the drive sprocket rotates to operate the drive crawler belt 2.

The engine E, the threshing unit 4, the grain box 10, and the like are mounted on a frame 16 that is a frame constituting the vehicle body 1.

The resin fuel tank 13 connected to the engine E has a shape including an upper convex portion 25a and a lower convex portion 25b whose upper and lower portions protrude from other surfaces, and is mounted in the vicinity of the rear portion of the threshing portion 4 of the frame 16 in a laterally long state.

As shown in fig. 3 and 4, the fuel tank 13 can be attached to and detached from the tank stay 15 from the side of the frame 16, and the fuel tank 13 can be detached downward when the tank stay 15 is detached.

Unlike the case of upward removal as in the prior art, the fuel tank 13 can be easily attached and detached without removing the threshing portion 4, and the work can be speeded up.

In order to facilitate downward removal, the fuel tank 13 is configured as shown in fig. 5, that is, the portion where the fuel tank 13 is mounted is cut off, and an opening 17 having a large opening is provided below, so that the fuel tank 13 can be easily removed downward through the opening 17.

A receiving portion 18 that is supported in a state of being carried on the right end side of the fuel tank 13 is formed on the right end side of the opening portion 17.

The receiving portion 18 is formed at a rear end portion of a right main frame 31 among the main frames constituting the frame 16.

As shown in fig. 6, when the fuel tank 13 is detached downward from the opening 17, one end side, that is, the left end side is rotationally displaced so as to be separated in a state of being inclined downward from the body 14, and the other end side (right end side) is supported in a state of being supported by the support portion 18 of the frame 16 of the body 14.

Accordingly, when the fuel tank 13 is detached, the one end side is rotationally displaced to be inclined downward from the body, so that the fuel remaining in the fuel tank 13 can be detached without being scattered.

Further, the other end side of the fuel tank 13 is supported in a state of being supported by the support portion 18 of the frame 16, so that the fuel tank 13 can be prevented from falling downward at one stroke.

Further, the drain bolt 24 is provided at the rear lower portion of the fuel tank 13, and when the fuel is discharged from the fuel tank 13, the drain bolt 24 can be removed from a place where mud is difficult to adhere, and by this configuration, the fuel can be smoothly discharged.

As shown in fig. 7, when the fuel tank 13 is removed, hoses for connecting the engine E and the fuel tank 13, that is, the suction hose 19, the return hose 20, the fuel pump 21, and the like are removed from the upper portion of the frame 16.

Therefore, the work on the frame 16 can be easily performed without performing the work in a narrow space under the running frame, that is, between the left and right running tracks 2.

In the structure shown in fig. 8, when the fuel tank 13 formed of a resin material is fixed, the support tie bar 22 protruding from the frame 16 is fastened to the frame 16 via the locking bolt 23 in the horizontal direction (lateral direction) rather than in the up-down direction.

In this way, the fastening and fixing of the locking bolt 23 is in the horizontal direction, and the pressing force applied to the fuel tank 13 can be small, and since the excessive pressing force is not applied, the deformation of the fuel tank 13 itself can be prevented.

The fuel tank 13 is supported by the tank stay 15 and the receiving portion 18 as described above.

In addition to the support of the tank stay 15 and the receiving portion 18, the substantially center of the fuel tank 13 is supported from below by the left main frame 32.

A fuel tank cover 34 for protecting the fuel tank 13 is provided below the fuel tank 13.

In the following description, the fuel tank cover 34 is a generic term for a cover member composed of a plurality of members that protect the fuel tank cover 13 from below.

As shown in fig. 17, the fuel tank 13 is detachable from below the frame 16.

When the fuel tank 13 is assembled, the opening 17 is inserted from the left lower side of the frame 16, and the right side portion of the fuel tank 13 is supported by the supporting portion 18.

Then, the fuel tank 13 is fixed from the left side by the tank stay 15, and the state of fig. 16 is set.

As shown in fig. 14, 15, and 16, the rear end portion of the left main frame 32 is detachable.

The rear end portion of the detachable left main frame 32 can support the substantially center of the fuel tank 13 from below.

The detachable rear end portion of the left main frame 32 serves as a support member 33.

As shown in fig. 15 and 18, the support member 33 is formed integrally with a part of the fuel tank cover 34.

The integrated member is a cover on the left side of the support member 33, and for convenience of description, is described as a left cover 34a, and the integrated state is described as a left cover 35 (further, the integrated member may be integrated by a firm joining method such as welding, or a method of detachably connecting the support member 33 and the left cover 34a may be used).

As shown in fig. 14 and 18, the left cover 35 has a hole in a substantially central portion thereof, and the hole is referred to as a cleaning port 35s.

According to the state of fig. 16, the left cover 35 of fig. 18 is attached to the frame 16 from below, so that the lower left side of the fuel tank 13 is protected by the left cover 35 as shown in fig. 13 and 14.

More specifically, the support member 33 is covered on the rear end portion of the left main frame 32, and the mounting hole 33h of the support member 33 and the mounting hole 32h of the left main frame 32 are overlapped and fastened by bolts.

Holes provided in the left cover 35 are bolted to the mounting portions provided in the frame 16.

The mounting hole 33a of the support member 33 is overlapped and bolted to the hole of the mounting portion 16a, and the mounting hole 35c of the left cover 34a is overlapped and bolted to the hole of the mounting portion 16 c.

When the fuel tank 13 and the left cover 35 are attached, the state of fig. 14 is set.

In the state of fig. 14, the protruding portion 25b of the fuel tank 13 and the portion that can be peeped from the scavenging port 35s are supported in an exposed state.

Maintenance of the lower portion of the fuel tank 13 is performed from the purge port 35s, and the drain bolt 24 can be attached to or detached from the exposed lower protruding portion 25b, so that fuel can be discharged.

With this structure, maintenance can be performed comfortably while the fuel tank 13 is held and supported.

Next, the state of fig. 13 will be described.

The state of fig. 13 is the state in which the left inner cover 34b and the right cover 34c are attached in the state of fig. 14.

The left inner cover 34b and the right cover 34c are attached below the fuel tank 13, and are covers (a part of the fuel tank cover 34) that protect the fuel tank 13 from below.

The left inner cover 34b is covered from below so as to partially overlap the left outer cover 34a (so as to cover the cleaning opening 35 s), and the mounting hole 35b provided in the left outer cover 34a and the mounting hole 35c provided in the left inner cover 34b are overlapped and bolted, so that the left inner cover can be mounted.

The right cover 34c is attached to the mounting portion 16b, the right main frame 31, and the support member 33.

The mounting hole 35d of the right cover 34c is overlapped and bolted to the mounting hole 31h of the right main frame 31, the mounting hole 35e of the right cover 34c is overlapped and bolted to the hole of the mounting portion 16b of the frame 16, and the mounting hole 35f of the right cover 34c is overlapped and bolted to the mounting hole 35h of the support member 33, and is mounted.

The above examples have exemplified the bolt fastening method for attaching and detaching the covers, but other methods are also possible.

As described above, the left cover 35, the left inner cover 34b, and the right cover 34c are attached, and thus the state of fig. 13 is achieved, and the lower side of the fuel tank 13 can be protected.

By performing the above-described steps in reverse, the covers and the fuel tank 13 can be removed.

According to the above configuration, the fuel tank 13 can be attached and detached without detaching the threshing portion 4, and maintenance of the fuel tank 13 can be performed by detaching only the cover without detaching the fuel tank 13, so that work can be performed comfortably, and the work time can be shortened.

Further, since the amount of labor required for attaching and detaching the fuel tank 13 and the fuel tank cover 34 is small, a single person operation can be performed.

The fuel tank 13 is supported from below by the receiving portion 18, the tank stay 15, and the support member 33, but may be supported only by the receiving portion 18 and the tank stay 15, or may be supported only by the receiving portion 18 and the support member 33.

As shown in fig. 19, a rear cover 36 for protecting the right rear of the fuel tank 13 is provided at the rear end portion of the frame 16.

The rear cover 36 prevents straw dust and the like from falling and accumulating on the fuel tank 13 and the like through the dust-discharging treatment cylinder 4b.

The fuel tank cover 34 may not be a three-divided structure such as the left cover 35, the left inner cover 34b, and the right cover 34c.

The left inner cover 34b and the left cover 35 may be integrally formed in advance, and may be divided into two left and right parts with the support member 33 interposed therebetween.

The left cover 34a may be divided into support members. Other structures may be used within a range not departing from the gist of the present utility model.

As shown in fig. 19, a second cereal lifting metal 43 connecting the second screw portion and the second cereal lifting tube 42 is provided at the lower portion of the second cereal lifting tube 42, and a swing frame weight 4e for balancing the swing of the swing frame 4c is provided at the right side of the swing frame 4c.

The upper right part of the fuel tank 13 has a concave shape so as to avoid the second cereal lifting metal 43 of the second cereal lifting cylinder 42, and also has a concave shape so as to avoid the rotation locus of the swing frame weight 4e.

The fuel tank 13 and the fuel tank cover 34 are located behind and below the threshing section 4, the left cover 35 is provided below the treatment cylinder 4a and the swing frame 4c, and the right cover 34c is provided below the treatment cylinder 4b.

The removable cover is disposed at a position where straw chips fall more, thereby facilitating cleaning.

The upper surface of the left side of the fuel tank 13 is located below the swing frame crank 4 d.

Thus, the fuel tank 13 does not contact the swing frame crank 4d or the like below the swing frame 4c, and does not interfere with the attachment and detachment.

As shown in fig. 20, the lower protruding portion 25b and the right cover 34c of the fuel tank 13 are disposed between the left and right crawler belts 2, below the upper surface of the crawler belts 2, and above the lower surface of the transmission case 40.

According to this structure, mud can be prevented from adhering.

In fig. 9, 10, 11, and 12, the fuel tank 13 is formed with upper and lower protrusions 25a and 25b protruding from the other surfaces, and when the fuel in the fuel tank 13 is reduced, the fuel intensively flows into the lower protrusions 25b.

Further, a fuel hose, a fuel filter 27, a fuel hose 26, a fuel pump 21, and a fuel intake 28 to the engine E, each of which is composed of the intake hose 19 and the return hose 20, are arranged straight in the forward direction of the convex portions 25a and 25b.

With this arrangement, the fuel path is shortened, fuel can be delivered from the fuel tank 13 to the engine fuel intake 28 as early as possible, performance can be stabilized, and simplification of fuel supply components (shortening of hoses) and weight reduction of components are achieved.

In fig. 9, an engine E is mounted in an engine room ER, and the engine E and a fuel tank 13 provided at the rear of the engine body communicate with each other through a fuel hose 26.

The fuel hose 26 is constituted by the suction hose 19 for supplying fuel to the engine E and the return hose 20 for returning the fuel to the fuel tank 13, but at least, is constituted so that only the suction hose 19 is passed through and held by a conventional support member in the engine compartment ER, that is, a support member in the up-down direction for supporting the driver seat 9 and the like.

With the above configuration, interference with other components in the engine compartment ER can be prevented, and it is not necessary to provide other support members only for the suction hose 19 as in the conventional case, and the position of the hose can be maintained in a simplified and stabilized manner.

In addition, the lower return hose 20 can be held by other support members.

The interference with other members in the engine compartment ER can be prevented, and the position can be easily maintained and stabilized by a simple structure without providing other support members as in the prior art.

The return hose 20 communicates with the fuel filter 29 and the fuel cooler 38 from the engine E.

A fuel filter 29 is provided in the return hose 20 returned from the engine E to the fuel tank 13 at the central rear lower portion of the engine E.

A fuel filter 27 for filtering fuel is provided in the middle of the suction hose 19.

The oil cooler 39 cools the lubricating oil of the transmission, and is provided in parallel with the fuel cooler 38.

As shown in fig. 12, a work space 30, which is removed rearward without the crawler belt 2, that is, a space rearward of the rear end of the crawler belt 2 is formed below the fuel tank 13 so that the fuel tank 13 can be removed rearward downward from the rear end of the machine body 14.

Accordingly, the removal operation of the fuel tank 13 can be easily performed by utilizing the space behind the travel crawler 2, and the maintenance and replacement of the fuel tank 13 can be easily performed.

In fig. 7, 11 and 9, the suction hose 19 and the return hose 20 are shown arranged upside down, but the fuel hoses may be arranged on either side without departing from the scope of the present utility model.

The structure of the fuel tank 13 may be as follows.

Next, although the drawings are omitted, in the arrangement structure of the fuel tank 13, in a structure which is arranged below the rear side of the threshing section 4 and is detachable from below, the fuel tank 13 is easily lifted at the time of replacement by opening and closing the center of the main frame covering the lower side of the housing while also serving as a guard for the fuel tank 13.

The fuel tank 13 is disposed below the rear side of the threshing section 4, and can be removed from below, and the cover of the fuel tank 13 is locked by lifting from the left side of the machine body, so that the operation can be easily performed.

This makes it possible to easily lift the fuel tank 13 at the time of replacement without complicating the structure.

In a structure in which the fuel tank 13 is disposed below the rear side of the threshing section 4 and is removable from the lower side, the cover of the fuel tank 13 is locked by lifting from the left side of the machine body, and the following structure may be employed: after the cover is temporarily lowered, it is slid leftward and removed.

In a structure in which the fuel tank 13 is disposed below the rear side of the threshing section 4 and is removable from below, even in a structure in which it can be replaced easily by a single operation, the above structure is: a rice cutter for opening the rear part of the threshing part 4, wherein a lever is provided at a position of detaching the right cover of the threshing part 4, and the fuel tank 13 can be lifted up and down entirely by lifting up and down the lever; the four corners of the fuel tank 13 are penetrated by worm shafts for up and down, so that the pedestal of each fuel tank 13 is up and down, and the fuel tank is easy to be assembled and disassembled; and unlocking the left side of the machine body, and carrying out up and down by a motor.

In addition, in the structure in which the fuel tank 13 can be removed from below, the main frame under the fuel tank 13 is removed, and the lower cover of the fuel tank 13 is removed, so that maintenance and replacement are facilitated.

At this time, the insertion bolts are integrated to the upper portion of the fuel tank 13, so that the downward falling can be prevented after the cover is removed.

In addition, in a structure in which the fuel tank 13 is disposed below the rear side of the threshing section 4 and is removable from below, even in a state of a single person work, the following structure is adopted, and the above structure is easy to replace: the left rear part of the main frame below the fuel tank 13 is detached and opened and closed towards the rear through a front side fulcrum of the engine body; the fuel tank guide on the left side of the machine body is fan-shaped, and each fuel tank 13 is opened and closed; and is lowered downward when the fixing bolts are removed from the arms disposed parallel to the rear side frames of the frames 16.

Although not shown, in a structure in which the fuel tank 13 can be attached and detached without detaching the threshing section 4, the fuel tank 13 may be attached and detached by detaching the support member at the right rear of the support members that support the threshing section 4.

In addition, a structure without a support member at the right rear portion of the threshing section 4 may be adopted, and the support member may not interfere with the attachment/detachment of the fuel tank 13.

Although not shown, a structure in the case of mounting two fuel tanks is described.

In the structure in which two fuel tanks are provided on the frame 16, one of the fuel tanks is disposed from the left end of the threshing section 4 to the right end of the treatment chamber in the left-right direction of the machine body, and the other fuel tank is disposed between the left main frame 32 and the right main frame 31.

The fuel tank provided between the main frames has a convex portion protruding downward.

In the above configuration, two fuel tanks can be attached and detached without detaching the threshing section 4.

The fuel tank on the threshing section 4 side can be attached to and detached from the lower side of the machine body.

The fuel tank provided between the main frames can be attached and detached from the upper side or the lower side of the machine body by opening the grain tank 10.

The connecting portion connecting the two fuel tanks is provided near the bottom surface of the fuel tank on the threshing portion 4 side, but is provided at a position higher than the protruding portion due to the fuel tank provided between the main frames.

Further, the dust-discharging processing tube 4b is connected to the rear side in the front-rear direction and to the lower side of the main frames 31 and 32 in the up-down direction.

With this structure, even when fuel flows from the fuel tank on the threshing portion 4 side into the fuel tank provided between the main frames by tilting the machine body 14, or when fuel is consumed and the remaining amount is small, the fuel concentrates on the convex portion of the fuel tank provided between the main frames, and therefore the fuel can be stably sucked.

Further, by preventing contact between the connecting portion and the threshing portion 4, breakage of the connecting portion is prevented.

The vehicle body 1 is provided with an exhaust gas purifying device 50 that purifies exhaust gas generated from the engine E.

The exhaust gas purifying device 50 is disposed between the threshing section 4 and the grain tank 10.

As shown in fig. 23, the engine E is connected to the exhaust gas purifying device 50. The exhaust gas moves from the exhaust port portion 51 of the engine E to the upstream exhaust pipe portion 52a, the intake port 50a of the exhaust gas purifying device 50, the exhaust port 50b of the exhaust gas purifying device 50, the exhaust pipe 58, and the downstream exhaust pipe portion 52 b.

The downstream exhaust pipe portion 52b is a tailpipe 60 having a double structure, which is connected to the exhaust pipe 58 of the exhaust port 50b of the exhaust gas purification device 50, and the inner pipe 60a and the outer pipe 60 b.

The tail pipe 60 has a tail gas guide plate 61 at a rear end portion thereof for guiding the tail gas further upward and rearward.

As shown in fig. 22 and 23, the tail pipe 60 has a double structure in which an inner pipe 60a is inserted into an outer pipe 60b, and a rear end portion of the exhaust pipe 58 is inserted into a base portion of the inner pipe 60 a.

The inner duct 60a and the outer duct 60b are welded to each other via a connecting plate at both the base side and the rear side, and a space through which outside air passes is formed between the inner duct 60a and the outer duct 60 b.

The inner duct 60a and the outer duct 60b having the double structure are eccentric.

The inner duct 60a is configured to be positioned closer to the lower side of the outer duct 60b than the outer duct 60b, and the gap between the inner duct 60a and the outer duct 60b is larger on the upper side than on the lower side.

That is, the space in the tail pipe 60 is enlarged and the space located above the inner pipe 60a is narrowed.

In particular, when the rear end of the outer duct 60b is located on the rear side of the body from the rear end of the inner duct 60a and the exhaust gas is discharged from the rear end of the inner duct 60a, the outside air is drawn from the base side to the rear side by the negative pressure passing through the gap between the inner duct 60a and the outer duct 60b, and the cooling effect of the tail pipe 60 is improved by the ejector effect.

The rear end of the exhaust pipe 58 is inserted into the base of the inner duct 60a, and part of the two overlap.

That is, the inner duct 60a has a portion overlapping both the outer duct 60b and the exhaust pipe 58.

As shown in fig. 22, the exhaust pipe may have a triple structure formed by the outer pipe 60b, the inner pipe 60a, and the exhaust pipe 58.

Since the base-side end of the inner duct 60a is located on the front side of the body than the base-side end of the outer duct 60b, the inner duct 60a has a portion longer than the outer duct 60b and overlapping the exhaust pipe 58.

According to this configuration, when the exhaust gas flows into the inner pipe 60a from the rear end portion of the exhaust pipe 58, the external air is introduced into the inner pipe 60a by the negative pressure, and the cooling effect of the tail pipe 60 is improved by the ejector effect.

Since the ejector effect is generated at the two positions of the outer duct 60b and the inner duct 60a, and the inner duct 60a and the exhaust pipe 58, the cooling effect of the downstream exhaust pipe portion 52b is further improved.

Even if rainwater or the like enters the outer duct 60b, the rainwater or the like flows in the space between the inner duct 60a and the outer duct 60b, and falls from the base-side end of the outer duct 60b to the outside of the outer duct 60b, so that intrusion into the exhaust gas purification device 50 can be prevented.

Even when rainwater or the like enters the inner duct 60a, the rainwater flows in the space between the inner duct 60a and the exhaust pipe 58, and falls outside the inner duct 60a from the base end side end of the inner duct 60a, so that the intrusion into the exhaust pipe 58 and the exhaust port 50b is prevented, and the intrusion into the exhaust gas purifying device 50 can be prevented, and the malfunction of the exhaust gas purifying device 50 can be prevented.

As shown in fig. 24, the tail pipe 60 further includes an upper cover 66 covering the upper portion of the rear end portion of the outer duct 60 b.

The upper cover 66 is attached to the outer pipe 60b of the double tail pipe 60 at intervals of a predetermined distance or more.

The terminal end portion of the upper cover 66 extends outside the outlet-side terminal end portion of the outer duct 60 b.

The upper cover 66 has a roof-like shape and covers an upper portion of the outer duct 60 b.

With the above configuration, even if straw chips and the like are deposited on the upper cover 66, they tend to slip downward, and the downstream exhaust pipe portion 52b where the temperature of the straw chips and the like is raised does not occur, so that fire can be prevented.

Further, since the upper cover 66 and the space between the outer pipe 60b and the upper cover 66 are provided above the outer pipe 60b, the surface temperature of the upper cover 66 located at the highest position of the downstream exhaust pipe portion 52b is further reduced, and the risk of fire and scalding is also reduced.

Further, by having the upper cover 66, the possibility of intrusion of rainwater or the like from the outer conduit 60b is further reduced.

As shown in fig. 25, in the structure in which the vehicle body 1 includes the exhaust gas purifying device 50, the recess 46 is formed in the left side surface portion 10Y of the grain box 10, and the exhaust gas purifying device 50 is disposed in the recess 46.

The recess 46 is formed with an upper inclined portion 46a, a side portion 46b, and a lower inclined portion 46c so as to be housed together with the exhaust gas purification device 50 and the DPF cover 65 that protects the exhaust gas purification device 50.

The recess 46 and the DPF cover 65 maintain a gap equal to or greater than a predetermined value, and do not come into contact with each other.

The exhaust gas purifying device 50 is provided with the DPF cover 65 surrounding the exhaust gas purifying device 50, and a gap is provided between the DPF cover 65 and the recess 46, whereby heat of the exhaust gas purifying device 50 can be prevented from being transferred to grains in the grain box 10.

A first cereal lifting/lowering discharge port 45 for discharging cereal grains from the first cereal lifting/lowering cylinder 41 into the cereal box 10 is connected to the upper side surface 10Y above the upper inclined portion 46 a.

Further, a rice full sensor is provided in the cereal box 10 above the upper inclined portion 46 a.

The exhaust gas purifying device 50 and the DPF cover 65 are surrounded by the recess 46 of the grain box 10, so that the possibility of contact from the periphery is greatly reduced, and the volume of straw chips and the risk of contact by an operator are reduced.

With the structure, fire and scald can be prevented.

In the structure in which the body 14 includes the fire extinguisher, the fire extinguisher is provided near the operation box 8 and the driver's seat 9, so that the hand of the operator can be easily touched.

Although not shown, in the structure including the exhaust gas purifying device 50, a fire extinguisher is provided near the rear of the air cleaner at a position that does not interfere with the opening and closing of the grain box 10.

Since a free space exists in the vicinity of the air cleaner, any space in the vicinity of the air cleaner can be effectively used, and the operator can easily confirm the space and easily reach the space.

Further, since the operation device is not a position where the operator is obstructed by manipulating the operation device, the feeling of operation is not lost.

A space for installing the fire extinguisher may be formed by providing a cutout or the like on the left side panel of the operation box 8, and the fire extinguisher may be stored in the space.

In this case, not only the operator can easily take out the fire extinguisher, but also the additional fixing member or the like is not dedicated in the space, and thus the construction is easy.

Claims (4)

1. A combine harvester is characterized by comprising:

an engine (E); and

a fuel tank (13) connected to the engine (E),

a fuel tank cover (34) which can be assembled and disassembled and is used for protecting the fuel tank (13) is arranged below the fuel tank (13),

the fuel tank cover (34) includes:

a left cover (34 a) for protecting the left lower part of the fuel tank (13); and

a right cover (34 c) for protecting the right lower part of the fuel tank (13).

2. A combine harvester according to claim 1, characterized in that,

the fuel tank (13) is supported from below by a support member (33),

the left cover (34 a) is integrally formed with the support member (33).

3. A combine harvester according to claim 1, characterized in that,

the right cover (34 c) is configured to be capable of being coupled to the support member (33), and is configured to be supported by the support member (33) when coupled.

4. A combine harvester according to claim 2, characterized in that,

the right cover (34 c) is configured to be capable of being coupled to the support member (33), and is configured to be supported by the support member (33) when coupled.