Combine

Abstract

To provide a combine-harvester configured so as to be able to enhance maintainability in a rearward portion of a cabin.SOLUTION: A combine-harvester 100 incudes: a grain tank 51 provided rearward of a cabin 14 (operation part); a pre-cleaner 62 disposed rearward of the cabin 14 (operation part) and on one direction side of a longitudinal direction; and an exhaust gas purification device 9 disposed rearward of the cabin 14 (operation part), overlapping the pre-cleaner 62 in plan view, and disposed at a position not overlapping the grain tank 51.SELECTED DRAWING: Figure 6

Description

Technical Field

[0001] The present invention relates to a combine equipped with an exhaust gas purification device.

Background Art

[0002] In the combine described in Patent Document 1, a pre-cleaner is disposed on the right rear side of the cabin, and an exhaust gas purification device is disposed on the left rear side of the cabin. Therefore, when performing maintenance such as cleaning, it is difficult to access them simultaneously, and the work posture has to be changed midway, so that the work cannot be carried out efficiently.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] The present invention has been made in view of the above circumstances, and an object thereof is to provide a combine capable of improving the maintainability in the rear part of the cabin.

Means for Solving the Problems

[0005] The combine according to the present invention includes a grain tank provided behind the cabin, a threshing device provided adjacent to one side in the left-right direction of the grain tank, a pre-cleaner disposed behind the cabin and on one side in the left-right direction, and an exhaust gas purification device provided between the grain tank and the threshing device and disposed below the pre-cleaner. According to such a configuration, since both the pre-cleaner and the exhaust gas purification device are disposed behind the cabin and on one side in the left-right direction, and are vertically arranged, it becomes easy to access them simultaneously. As a result, work can be efficiently performed without changing the working posture, and the maintainability at the rear part of the cabin is improved.

[0006] It includes an outside air inlet for introducing outside air into the air conditioner provided in the cabin, and a collection filter attached to the outside air inlet, and it is preferable that the outside air inlet is formed in a wall portion on one side in the left-right direction of the cabin. According to such a configuration, in addition to the pre-cleaner and the exhaust gas purification device, it is also possible to easily access the collection filter attached to the outside air inlet, so the maintainability is further improved.

[0007] It includes a cover member covering the exhaust gas purification device, the cover member has a first opening provided on the front side of the exhaust gas purification device and a second opening provided on one side in the left-right direction of the exhaust gas purification device, and it is preferable that the first opening is formed smaller than the second opening. By covering the cover member provided with the opening, it is possible to protect from dust and suppress overheating of the exhaust gas purification device. Since the operator usually accesses the exhaust gas purification device from the front side (i.e., the cabin side) and does not access from one side in the left-right direction (i.e., the threshing device side), by forming the first opening smaller than the second opening, it is possible to achieve both safety and air permeability.

[0008] A winnowing device disposed between the grain tank and the threshing device is connected to the threshing device via a connecting member, and it is preferable that the rear end portion of a tail pipe that guides the exhaust gas that has passed through the exhaust gas purification device to the outside of the machine is supported by the connecting member. As a result, since the vibration of the threshing device is not directly transmitted to the tail pipe, the tail pipe can be firmly supported. Further, by supporting the tail pipe with the connecting member instead of directly supporting it with the winnowing device, there is no concern that the fixtures used for the support will interfere with a conveyor or the like built into the winnowing device.

[0009] A bulging portion bulging toward one side in the left-right direction is formed at the rear portion of the grain tank, and the rear end of a tail pipe that guides the exhaust gas that has passed through the exhaust gas purification device to the outside of the machine is disposed behind the rear end of a winnowing device disposed between the grain tank and the threshing device and in front of the most bulging portion of the bulging portion. This is advantageous in improving the capacity of the grain tank and preventing the exhaust gas that has passed through the exhaust gas purification device from being blown onto the winnowing device.

Brief Description of the Drawings

[0010]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Figure 13

Mode for Carrying Out the Invention

[0011] An example of a combine according to the present invention will be described.

[0012] [Overall Structure of Combine] First, the overall structure of the combine will be briefly described. FIGS. 1 to 3 show the left side, right side, and plan view of the combine 100 of the present embodiment, respectively. In the figures, the front-rear direction, left-right direction, and up-down direction of the combine 100 are indicated by arrows. The combine 100 includes a traveling device 1, a cutting device 2, a threshing device 3, a sorting device 4, a storage device 5, and a power device 6.

[0013] The traveling device 1 is provided below the body frame 10. The traveling device 1 has a transmission 11 and a pair of left and right crawler devices 12. The transmission 11 transmits the power of the power device 6 mounted on the body frame 10 to the crawler device 12. The crawler device 12 runs the combine 100 in the front-rear direction or turns the combine 100 in the left-right direction.

[0014] The cutting device 2 is provided in front of the traveling device 1. The cutting device 2 has a reel 21, a cutter (cutting blade) 22, an auger (lateral feed screw) 23, and a conveying conveyor 24. The reel 21 guides the cereal straw in the field to the cutter 22 by rotating. The cutter 22 cuts the cereal straw guided by the reel 21. The auger 23 gathers the cereal straw cut by the cutter 22 at a predetermined position (the cereal straw supply port of the conveying conveyor 24). The conveying conveyor 24 conveys the cereal straw gathered by the auger 23 to the front rotor 33 (see FIG. 5) of the threshing device 3.

[0015] The threshing device 3 is located behind the harvesting device 2 and is arranged on one side in the left - right direction (the left side in this embodiment). The threshing device 3 has a handling cylinder 31 and a receiving net 32 provided below the handling cylinder 31. The handling cylinder 31 is housed in a handling chamber 30 (see Fig. 5). By rotating, the handling cylinder 31 conveys the cereal straws backward while threshing them. The receiving net 32 supports the cereal straws conveyed by the handling cylinder 31 and causes the threshed product to fall onto the sorting device 4. Below the handling cylinder 31, a first screw conveyor 143 and a second screw conveyor 144 (see Fig. 5), which are screw conveyors for conveying grains, are provided. Both of them convey the threshed product in the horizontal direction (left - right direction).

[0016] The sorting device 4 is provided below the threshing device 3. The sorting device 4 has a swing - sorting device 41 that swings in the front - rear direction to swing - sort the threshed product leaking from the receiving net 32. The grains sorted by the swing - sorting device 41 are conveyed by the first screw conveyor 143 and then lifted upward by a bucket - type grain - lifting device 7 and fed into the inlet 153 of the grain tank 51. Also, the sorting device 4 has a blower device 42 that blows air toward the swing - sorting device 41. The blower device 42 blows away impurities such as straw fragments contained in the threshed product. The impurities such as straw fragments are discharged to the outside through a straw discharge port 45 provided behind the sorting device 4.

[0017] The storage device 5 is located behind the harvesting device 2 and is arranged on the other side in the left - right direction (the right side in this embodiment). The storage device 5 is provided adjacent to the threshing device 3 in the left - right direction. The storage device 5 includes a grain tank 51 for storing grains. The grain tank 51 stores the grains conveyed from the sorting device 4 via the first screw conveyor 143 and the grain - lifting device 7. The grain - lifting device 7 is arranged between the threshing device 3 and the grain tank 51. The grain tank 51 is rotatably supported with respect to the machine frame 10 around the vertical axis 51p at its rear end. When discharging the grains in the grain tank 51, a discharge auger 52 is used. The discharge auger 52 is configured to be rotatable in the up - down, left - right directions and can discharge the grains to an arbitrary location.

[0018] The power unit 6 is provided below the operation unit 13 and in front of the storage device 5. The power unit 6 is composed of an engine 61. The engine 61 in the present embodiment is a diesel engine, which converts the thermal energy obtained by burning fuel into kinetic energy. More specifically, the engine 61 converts the thermal energy obtained by burning fuel into power for driving each part such as the traveling device 1. The power unit 6 may include both the engine 61 and an electric motor that generates power by electricity.

[0019] The operation unit 13 is provided in front of the fuel tank 51 and at the right front part of the body frame 10. The operation unit 13 is covered by a cabin 14, and the fuel tank 51 is provided behind the cabin 14. Although not shown in the drawings, inside the cabin 14, there are provided a driver's seat on which an operator sits and a steering handle disposed in front of the driver's seat, and various operation tools such as a shift lever, a clutch lever, and switches are arranged around them. As shown in FIG. 4, the engine 61 is disposed below the operation unit 13.

[0020] Connected to the engine 61 are a pre-cleaner 62 that sucks air while filtering the air supplied to the engine 61, and an air cleaner 63 that removes impurities in the sucked air. Both the pre-cleaner 62 and the air cleaner 63 are located above the engine 61. The pre-cleaner 62 is disposed behind the cabin 14 and on one side in the left-right direction rather than the air cleaner 63. Further, the air cleaner 63 is provided so as to be biased to the other side in the left-right direction in a gap formed between the engine 61 and the rear part of the cabin 14. The pre-cleaner 62 and the air cleaner 63 are connected via an intake pipe 69. The upper end of the intake pipe 69 is connected to an opening provided at the lower part of the pre-cleaner 62, and the lower end of the intake pipe 69 is connected to an opening provided at the rear part of the air cleaner 63 and on the one side in the left-right direction.

[0021] [Threshing device] Next, the threshing device 3 will be described. As shown in FIG. 5, the threshing device 3 includes a handling chamber 30, a handling cylinder 31, a receiving net 32, and a front rotor 33. The handling chamber 30 is partitioned and formed by the receiving net 32, the machine frame 300, and the like. The machine frame 300 is attached with an upper cover 301 disposed above the handling cylinder 31, a front wall member 302 disposed in front of the handling cylinder 31, and a rear wall member 303 disposed behind the handling cylinder 31. The grain straw conveyed by the conveying conveyor 24 is fed into the handling chamber 30 by the front rotor 33. The front rotor 33 not only conveys the grain straw but also has a function of performing preliminary threshing (pre-threshing).

[0022] The handling cylinder 31 includes a handling cylinder shaft 311 extending along the front-rear direction, a scraping screw 312, and a two-tooth bar (handling tooth support member) 313. The handling cylinder 31 rotates about the handling cylinder shaft 311. The handling cylinder shaft 311 is rotatably supported by the front wall member 302 and the rear wall member 303. The rotational power from the engine 61 is transmitted to the handling cylinder shaft 311. The handling cylinder shaft 311 is a linearly formed structure that supports the scraping screw 312 and a plurality of two-tooth bars 313.

[0023] The scraping screw 312 is disposed at the front part of the handling cylinder 31. The scraping screw 312 is a structure in which a spiral impeller (scraping blade) 312b is detachably formed. The scraping screw 312 scrapes the grain straw fed by the front rotor 33. That is, by rotating, the scraping screw 312 takes in the grain straw fed by the front rotor 33 and sends it out rearward. The scraping screw 312 is not limited to a structure in which a spiral impeller 312b is formed, and a structure in which a plurality of blades are formed may also be used.

[0024] Behind the raking screw 312, a plurality of two-tooth bars 313 are arranged around the handling cylinder shaft 311. The two-tooth bar 313 is a structure in which a plurality of handling teeth 313t are arranged in parallel with a predetermined interval therebetween. The two-tooth bar 313 threshes the cereal straws fed out by the raking screw 312. That is, by rotating, the two-tooth bar 313 kneads and strikes the cereal straws fed out by the raking screw 312 to drop the threshed grains. The two-tooth bar 313 is not limited to a structure having a plurality of handling teeth 313t, and may have a structure having spiral blades. In the present embodiment, a rotating body having a cylindrical shape as a whole is configured by separating the internal space of the handling cylinder 31 and the external space of the handling cylinder 31 by a plurality of two-tooth bars 313 and a plurality of plate members 314 provided across the two-tooth bars 313. Instead, a structure in which a plurality of handling teeth 313t are provided on a cylindrical rotating body may be used.

[0025] The receiving net 32 is provided along the lower outer peripheral surface of the handling cylinder 31 and is formed in a substantially U shape when viewed from the front-rear direction. In the present embodiment, the receiving net 32 is arranged so as to cover the lower part of the rotating body constituted by the plurality of two-tooth bars 313. The receiving net 32 supports the cereal straws kneaded by the two-tooth bar 313. The receiving net 32 is mainly constituted by a net body 321. The net body 321 is a structure formed by stretching wires in parallel at a predetermined interval. The receiving net 32 allows the threshed product threshed by the handling cylinder 31 to leak through the gaps of the net body 321. The cereal straws that did not leak from the receiving net 32 are discharged as discharged straws from the rear end portion of the receiving net 32.

[0026] The grain elevating device 7 is located behind the cabin 14 and is arranged between the threshing device 3 and the grain tank 51. That is, the grain elevating device 7 is arranged on the right side of the threshing device 3 and on the left side of the grain tank 51. The grain elevating device 7 conveys the threshed product (the first processed product) processed by the threshing device 3 to the grain tank 51. As shown in FIG. 1, the grain elevating device 7 includes a bucket conveyor 71 and a grain elevating case 72 that houses the bucket conveyor 71 therein. The bucket conveyor 71 has a pair of sprockets 711, 712 arranged at intervals in the vertical direction and an endless chain 713 wound therebetween, and a plurality of buckets 714 attached to the chain 713.

[0027] [Sorting device] Next, the sorting device 4 will be described. As shown in FIG. 5, the sorting device 4 includes a swing sorting device 41 and a blower device 42. The swing sorting device 41 sorts grains by sieving the threshed product. The blower device 42 sorts grains by blowing away impurities such as chaff contained in the threshed product.

[0028] The swing sorting device 41 has a feed pan 411, a chaff sieve 412, and a straw rack 413. The chaff sieve 412 is disposed at the lower rear of the feed pan 411, and the straw rack 413 is disposed behind the chaff sieve 412. The feed pan 411 is a structure formed wide and flat. The feed pan 411 receives the threshed product that has fallen from the receiving net 32. The feed pan 411 swings back and forth to move the threshed product on the feed pan 411 backward while leveling it. At this time, the threshed product is evenly spread in the left - right direction by the fins 411f attached obliquely.

[0029] The chaff sieve 412 has a plurality of sieve plates 412p arranged in parallel with a predetermined interval therebetween. The plurality of sieve plates 412p extend along the left - right direction and are arranged side - by - side in the front - rear direction. The angle of the sieve plate 412p can be adjusted according to the amount of the threshed product. The chaff sieve 412 swings back and forth to sieve the threshed product sent from the feed pan 411, lift the mixed impurities, and separate them from the grains. The threshed product (the "first - stage processed product" consisting only of grains) sorted by the chaff sieve 412 passes through the sieve net 416, and then is guided by the first - stage grain plate 431 and falls into the first - stage trough 43, and is sent to the first - stage conveyor 143. The threshed product remaining on the chaff sieve 412 moves backward and is sent to the straw rack 413.

[0030] The straw rack 413 has a plurality of rack plates 413p arranged in parallel with a predetermined interval therebetween. The straw rack 413 rocks back and forth to sieve the threshed material sent from the chaff sheave 412, support the relatively large foreign matter mixed therein, and separate it from the grains. The threshed material (the "second-process material" which is the grains and a small number of small foreign matters) selected by the straw rack 413 is guided by the second grain chute plate 441 and falls into the second chute 44, and is sent by the second conveyor 144 and reductively conveyed to the front end side of the sorting device 4 to be subjected to the sorting process again. The threshed material remaining on the straw rack 413 moves rearward and is discharged to the outside.

[0031] The blower device 42 is disposed below the front part of the oscillating sorting device 41 and supplies sorting air toward the oscillating sorting device 41. The blower device 42 has a fan 421 and a fan case 422. In the present embodiment, the fan 421 is disposed below the feed pan 411, and the fan case 422 is disposed so as to cover the fan 421. The fan 421 has a plurality of fan plates 421p attached at a predetermined angle. The fan 421 rotates to send out air, thereby blowing off the foreign matters placed on the chaff sheave 412 and the straw rack 413 and the foreign matters that have fallen therefrom. The fan case 422 is a structure formed by bending a plate material. The fan case 422 covers the fan 421 and guides the air sent out by the fan 421 in a predetermined direction.

[0032] [Rear part of the cabin] As described above, the combine 100 of the present embodiment includes a grain tank 51 provided behind the cabin 14, a threshing device 3 provided adjacent to the grain tank 51 on one side in the left - right direction (the left side in this embodiment), and a pre - cleaner 62 disposed behind the cabin 14 and on one side in the left - right direction. Further, as shown in FIGS. 6 and 7, the combine 100 includes an exhaust gas purification device 9 provided between the grain tank 51 and the threshing device 3 and disposed below the pre - cleaner 62. The exhaust gas purification device 9 is a filter that removes particulate matter in the exhaust gas discharged from the engine 61 and is also called a DPF (Diesel Particulate Filter). Note that the exhaust gas purification device 9 may have a configuration including SCR (Selective Catalytic Reduction) instead of or in addition to the DPF. When both the DPF and SCR are included in the exhaust gas purification device 9, they can be arranged side - by - side left - to - right, or side - by - side up - and - down, or in series front - to - back in a posture where they are both oriented in the front - to - back direction.

[0033] The left window 15 of the cabin 14 is supported so as to be rotatable up and down via a hinge 15a. The operator can open the left window 15 and lean out backward from the driver's cab 13 to perform maintenance such as cleaning on the rear part of the cabin 14. Since both the pre - cleaner 62 and the exhaust gas purification device 9 are disposed behind the cabin 14 and on one side in the left - right direction (i.e., the left side) and are arranged vertically, it is easy to access them simultaneously. Therefore, work can be efficiently performed without changing the working posture, and the maintainability of the rear part of the cabin 14 is improved. In the present embodiment, as shown in FIG. 6, the exhaust gas purification device 9 is disposed directly below the pre - cleaner 62, and they are in an overlapping positional relationship in plan view, so the effect of improving maintainability is significant.

[0034] The combine 100 of this embodiment includes an outside air inlet 16w for introducing outside air into the air conditioner 16 provided in the cabin 14, and a collection filter 16f attached to the outside air inlet 16w (see Fig. 7). The outside air inlet 16w is formed in a wall portion 14L on one side in the left-right direction of the cabin 14. More specifically, it is formed in an inclined surface 14a that constitutes the rear portion of the wall portion 14L. Since the outside air inlet 16w is provided on the same left side as the pre-cleaner 62 and the exhaust gas purification device 9, it is easy to access the collection filter 16f attached to the outside air inlet 16w, further improving the maintainability. In this embodiment, since the pre-cleaner 62 is arranged facing the outside air inlet 16w, the effect of improving maintainability is significant.

[0035] The air conditioner 16 is installed below an outer roof 14r that constitutes the upper outer surface of the cabin 14. The collection filter 16f is a net member for collecting dust contained in the outside air introduced through the outside air inlet 16w, and is composed of, for example, punching metal. An introduction amount control plate 16p as shown in Fig. 4 is placed outside the outside air inlet 16w (Fig. 7 shows a state where the introduction amount control plate 16p is removed). The introduction amount control plate 16p is attached to the wall portion 14L (the inclined surface 14a thereof) so that gaps are provided vertically. For this reason, the inflow of outside air is possible through the upper and lower gaps, and it is possible to suppress clogging of the collection filter 16f while increasing the area of the outside air inlet 16w.

[0036] As shown in FIG. 8, the exhaust gas purification device 9 is covered with a cover member 90, which protects the exhaust gas purification device 9 from dust. However, on the other hand, since there is a concern about overheating of the exhaust gas purification device 9, an opening is provided on the side of the cover member 90 to ensure air permeability. In the present embodiment, the cover member 90 has a first opening 91 provided on the front side (i.e., on the side of the cabin 14) of the exhaust gas purification device 9 and a second opening 92 provided on one side in the left-right direction (i.e., on the side of the threshing device 3) of the exhaust gas purification device 9, and the former is formed smaller than the latter. Since the operator usually accesses the exhaust gas purification device 9 from the side of the cabin 14 and does not access it from the side of the threshing device 3, both safety and air permeability can be achieved in this way.

[0037] The cover member 90 has an upper surface portion 90u disposed above the exhaust gas purification device 9, a front side surface portion 90f disposed in the front, and a right side surface portion 90r (see FIG. 6) disposed on the right side, and a large number of first openings 91 are formed in the front side surface portion 90f. In FIG. 8, the first opening 91 is formed only in a partial region of the front side surface portion 90f, but actually it is formed in substantially the entire region of the front side surface portion 90f. The first opening 91 is preferably a small hole having a size that does not allow a person's hand or finger to enter.

[0038] Further, as shown in FIG. 9, the cover member 90 has a third opening 93 provided on the other side in the left-right direction (i.e., on the side of the grain tank 51) of the exhaust gas purification device 9. The third opening 93 is formed smaller than the second opening 92. Thereby, when the grain tank 51 is rotated around the vertical axis core 51p with the lateral outer side facing outward and the right side of the threshing device 3 is opened for maintenance work, the safety is enhanced. A large number of the third openings 93 are formed in the right side surface portion 90r of the cover member 90. In FIG. 9, the third opening 93 is formed only in a partial region of the right side surface portion 90r, but actually it is formed in substantially the entire region of the right side surface portion 90r. The third opening 93 is preferably a small hole having a size that does not allow a person's hand or finger to enter.

[0039] The cover member 90 does not have a side surface disposed on the left side of the exhaust gas purifying device 9, and the left side of the exhaust gas purifying device 9 is entirely open via the second opening 92. This maximally enhances the air permeability so that heat dissipation is efficiently performed. For the same reason, the cover member 90 does not have a side surface disposed behind the exhaust gas purifying device 9, and the rear of the exhaust gas purifying device 9 is entirely open (see FIGS. 9 and 10). However, it is not limited to this. For example, it is also possible to dispose the side surface of the cover member 90 on the left side of the exhaust gas purifying device 9 and form a second opening larger than the first opening 91 on that side surface.

[0040] The exhaust gas purifying device 9 has a tail pipe 94 that guides the exhaust gas that has passed through the exhaust gas purifying device 9 outside the machine. As shown in FIG. 10, the rear end portion 94b of the tail pipe 94 is supported in an inclined posture to the left and is configured to guide the exhaust gas upward above the threshing device 3. Thereby, while ensuring the vertical interval from the discharge auger 52, it is possible not to blow the exhaust gas onto the elevating device 7. The elevating device 7 disposed between the grain tank 51 and the threshing device 3 is connected to the threshing device 3 via a connecting member 78, and the rear end portion 94b of the tail pipe 94 is supported by the connecting member 78. Furthermore, the rear end portion 94b of the tail pipe 94 is supported by the connecting member 78 via a support member 95.

[0041] The connecting member 78 is fixed to the threshing device 3 with bolts 78b on one side in the left - right direction (i.e., the left side), and is welded to the elevating case 72 on the other side in the left - right direction (i.e., the right side). Since the rear end portion 94b of the tail pipe 94 is supported by the connecting member 78, large vibrations of the threshing device 3 accompanying the rotation of the threshing cylinder 31 are not directly transmitted to the tail pipe 94, and the tail pipe 94 can be firmly supported. Also, by supporting the tail pipe 94 with the connecting member 78 instead of directly supporting it with the elevating device 7, there is no concern that the fixtures (for example, bolts and nuts) used for the support interfere with the bucket conveyor 71 inside the elevating case 72.

[0042] As shown in Fig. 6, a bulging portion 51s bulging toward one side in the left - right direction is formed at the rear part of the grain tank 51. For the sake of illustration, in Fig. 10, the bulging portion 51s is drawn transparently. The bulging portion 51s is disposed behind the winnowing device 7. Also, the rear end 94e of the tail pipe 94 is disposed behind the rear end 7e of the winnowing device 7 and in front of the most bulging part 51e of the bulging portion 51s. According to such a configuration, while improving the capacity of the grain tank 51, it is convenient for preventing the exhaust gas that has passed through the exhaust gas purification device 9 from being blown onto the winnowing device 7.

[0043] [Power transmission mechanism] As shown in Figs. 11 to 13, the combine 100 includes a power transmission mechanism 170 that transmits the rotational power from the engine 61 to the drive shaft 17a of the compressor 17 of the air conditioner 16. The power transmission mechanism 170 is a belt transmission mechanism that transmits rotational power via a transmission belt 170b. The transmission belt 170b is stretched across the output shaft 61a of the engine 61 and the drive shaft 17a of the compressor 17. The tension roller 171 maintains the tension of the transmission belt 170b. Above the output shaft 61a, a cooling fan 64 to which rotational power is transmitted via a belt 64b is arranged.

[0044] This combine 100 further includes a power transmission mechanism 510 that transmits the rotational power from the engine 61 to the lower conveyor shaft 53 of the grain tank 51. The power transmission mechanism 510 is a belt transmission mechanism that transmits rotational power via a transmission belt 510b. The transmission belt 510b is stretched across the output shaft 61a of the engine 61 and the grain inlet shaft 511. The rotational power from the engine 61 is transmitted from the output shaft 61a to the grain inlet shaft 511 via the transmission belt 510b and then transmitted to the lower conveyor shaft 53 via a bevel gear mechanism 512. The lower conveyor shaft 53 is the drive shaft of a horizontal feed auger 57 that conveys the grain in the grain tank 51 in the horizontal direction.

[0045] At the rear end of the lower conveyor shaft 53, the lower end of the vertical conveyor shaft 54 is interlockingly connected via a bevel gear mechanism 513. And at the upper end of the vertical conveyor shaft 54, the rear end of the horizontal conveyor shaft 55 is interlockingly connected via a chain transmission mechanism 514, a bevel gear mechanism 515, a chain transmission mechanism 516, and a bevel gear mechanism 517. The vertical conveyor shaft 54 is the drive shaft of the vertical auger 58 that conveys the grain in the grain tank 51 upward, and the horizontal conveyor shaft 55 is the drive shaft of the discharge auger 52.

[0046] As shown in FIGS. 12 and 13, the compressor 17 is supported by an engine horizontal frame 65 that extends in the left-right direction behind the engine 61. The compressor 17 is supported at its upper and lower parts. The upper part of the compressor 17 is fixed to an upper fixing member 66 welded to the engine horizontal frame 65, and the lower part of the compressor 17 is fixed to a lower fixing member 67 welded to the engine horizontal frame 65. Also, the rear end portion 172a of the arm 172 that supports the tension roller 171 is supported by the upper fixing member 66 via a spring 173 and a bracket 174, and the pivot point 172b of the arm 172 is supported by the lower fixing member 67.

[0047] A grain clutch 56 is provided between the output shaft 61a of the engine 61 and the grain input shaft 511. The operation unit 13 is provided with a grain clutch lever 18 for switching the grain clutch 56 (see FIG. 3). The grain clutch 56 has a tension pulley 561 that acts on the transmission belt 510b and an arm 562 that supports the tension pulley 561. A wire 18w connected to the grain clutch lever 18 is connected to the rear end portion 562a of the arm 562 via a spring 563. The pivot point 562b of the arm 562 is supported by an engine vertical frame 68 that extends in the vertical direction at the right rear of the engine 61.

[0048] The power transmission mechanism 170 and the power transmission mechanism 510 extract rotational power from the same output shaft 61a, and the pulley 170p around which the transmission belt 170b is looped is arranged outside (the right side of the machine body) the pulley 510p around which the transmission belt 510b is looped. Therefore, even when a trouble such as the transmission belt 510b breaking occurs when driving the discharge auger 52 to discharge the grain in the grain tank 51, the replacement of the belt components can be easily performed.

[0049] In this embodiment, an example of a conventional combine is shown, but the present invention is not limited thereto, and the present invention may be a self-unloading combine.

[0050] The present invention is not limited to the above-described embodiments at all, and various improvements and modifications can be made without departing from the spirit of the present invention. within the range.

Explanation of Signs

[0051] 3 Threshing device 7 Grain elevating device 9 Exhaust gas purification device 13 Operation unit 14 Cabin 16 Air conditioner 16f Collection filter 16w Outside air inlet 51 Grain tank 51e Most bulging part 51s Bulging part 61 Engine 62 Pre-cleaner 78 Connecting member 90 Cover member 91 First opening 92 Second opening 93 Third opening 94 Tail pipe 94b Rear end part 100 Combine

Claims

1. A grain tank provided behind the operator's cab, a pre-cleaner arranged behind the operator's cab and on one side in the left-right direction, an exhaust gas purification device arranged behind the operator's cab, overlapping the pre-cleaner in plan view and not overlapping the grain tank, a combine harvester comprising the same.

2. The combine harvester according to claim 1, further comprising a threshing device provided adjacent to the grain tank on one side in the left-right direction, wherein the exhaust gas purification device is provided between the grain tank and the threshing device.

3. The combine harvester according to claim 2, wherein a grain elevator arranged between the grain tank and the threshing device is connected to the threshing device via a connecting member.

4. The combine harvester according to claim 3, wherein a rear end portion of a tail pipe for guiding exhaust gas that has passed through the exhaust gas purification device outside the machine is supported by the connecting member.

5. The combine harvester according to claim 4, wherein a rear end of the tail pipe is arranged behind a rear end of the grain elevator.

Images