JP7708946B2 - combine - Google Patents

Description

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

In the combine harvester described in Patent Document 1, the precleaner is located on the rear right side of the cabin, and the exhaust gas purification device is located on the rear left side of the cabin. Therefore, it is difficult to access both at the same time when performing maintenance such as cleaning, and the worker is forced to change his/her working position during the work, making it difficult to work efficiently.

JP 2015-123050 A

The present invention was made in consideration of the above circumstances, and its purpose is to provide a combine harvester that improves the ease of maintenance in the area behind the cabin.

The combine harvester according to the present invention comprises a grain tank provided behind the cabin, a threshing device provided adjacent to the grain tank on one side in the left-right direction, a precleaner arranged 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 below the precleaner. With this configuration, both the precleaner and the exhaust gas purification device are arranged behind the cabin on one side in the left-right direction, and are arranged above and below each other, making it easy to access them simultaneously. As a result, work can be performed efficiently without changing the working posture, and maintainability in the area behind the cabin is improved.

It is preferable that the vehicle is provided with an outside air inlet for introducing outside air into an air conditioning device provided in the cabin, and a collection filter attached to the outside air inlet, and that the outside air inlet is formed in a wall on one of the left and right sides of the cabin. With this configuration, the precleaner and exhaust gas purification device, as well as the collection filter attached to the outside air inlet, can be easily accessed, further improving maintainability.

It is preferable that the cover member is provided to cover the exhaust gas purification device, the cover member having 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 the first opening is formed smaller than the second opening. By covering the exhaust gas purification device with a cover member provided with an opening, it is possible to prevent overheating of the exhaust gas purification device while protecting it from dust. Since workers usually access the exhaust gas purification device from the front side (i.e., the cabin side) and not 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 ventilation.

It is preferable that the lifting device, which is disposed between the grain tank and the threshing device, is connected to the threshing device via a connecting member, and the rear end of a tailpipe, which 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. This prevents the vibrations of the threshing device from being directly transmitted to the tailpipe, so that the tailpipe can be firmly supported. In addition, by supporting the tailpipe with a connecting member rather than directly with the lifting device, there is no need to worry about the fixing device used for the support interfering with the conveyor built into the lifting device.

A bulging portion is formed at the rear of the grain tank, bulging toward one side in the left-right direction, 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 preferably positioned rearward of the rear end of the grain lifting device that is positioned between the grain tank and the threshing device, and forward of the most bulging portion of the bulging portion. This is advantageous in preventing the exhaust gas that has passed through the exhaust gas purification device from being blown into the grain lifting device while improving the capacity of the grain tank.

Left side view of combine harvester Right side view of combine harvester Top view of a combine harvester Right rear perspective view of the cabin FIG. 1 is a vertical cross-sectional view showing a threshing device and a sorting device. FIG. 2 is a plan view showing the periphery of the precleaner and the exhaust gas purification device; FIG. 2 is a perspective view showing the periphery of a precleaner and an exhaust gas purification device; Left front perspective view of the exhaust gas purification device Right rear perspective view of the exhaust gas purification device Left rear perspective view of the exhaust gas purification device Schematic diagram showing part of the transmission structure of a combine harvester Right front perspective view showing the engine and its surroundings Right rear perspective view showing the engine and its surroundings

An example of a combine harvester according to the present invention is described below.

[Overall structure of combine harvester]
First, the overall structure of the combine will be briefly described. Figures 1 to 3 respectively show the left side, right side, and top of a combine 100 of this embodiment. In the figures, arrows indicate the front-rear, left-right, and up-down directions of the combine 100. The combine 100 includes a traveling device 1, a harvesting device 2, a threshing device 3, a sorting device 4, a storage device 5, and a power device 6.

The traveling device 1 is provided below the machine frame 10. The traveling device 1 has a transmission 11 and a pair of crawler devices 12 provided on the left and right. The transmission 11 transmits the power of the power unit 6 mounted on the machine frame 10 to the crawler devices 12. The crawler devices 12 cause the combine harvester 100 to travel in the forward and backward directions and turn the combine harvester 100 in the left and right directions.

The harvesting device 2 is provided in front of the traveling device 1. The harvesting device 2 has a reel 21, a cutter (cutting blade) 22, an auger (cross feed screw) 23, and a conveyor 24. The reel 21 guides the culms in the field to the cutter 22 by rotating. The cutter 22 cuts the culms guided by the reel 21. The auger 23 collects the culms cut by the cutter 22 at a predetermined position (the culm supply port of the conveyor 24). The conveyor 24 transports the culms collected by the auger 23 to the front rotor 33 of the threshing device 3 (see Figure 5).

The threshing device 3 is located behind the harvesting device 2, on one side in the left-right direction (on the left side in this embodiment). The threshing device 3 has a threshing drum 31 and a receiving net 32 provided below the threshing drum 31. The threshing drum 31 is housed in the threshing chamber 30 (see FIG. 5). The threshing drum 31 rotates to transport the stalks backward while threshing them. The receiving net 32 supports the stalks transported by the threshing drum 31 and drops the threshed material into the sorting device 4. Below the threshing drum 31, there are provided a first conveyor 143 and a second conveyor 144 (see FIG. 5), which are screw conveyors for transporting grain. Both of these transport the threshed material horizontally (left-right).

The sorting device 4 is provided below the threshing device 3. The sorting device 4 has a oscillating sorting device 41 that oscillates back and forth to oscillate and sort the threshed material that has fallen through the receiving net 32. The grains sorted by the oscillating sorting device 41 are transported by the first conveyor 143, then lifted upward by the bucket-type grain lifting device 7 and fed into the inlet 153 of the grain tank 51. The sorting device 4 also has a blower device 42 that blows air toward the oscillating sorting device 41. The blower device 42 blows away impurities such as straw dust contained in the threshed material. The impurities such as straw dust are discharged to the outside from the discharge outlet 45 provided behind the sorting device 4.

The storage device 5 is disposed behind the harvesting device 2, on the other side in the left-right direction (the right side in this embodiment). The storage device 5 is disposed 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 grains transported from the sorting device 4 via the first conveyor 143 and the grain lifting device 7. The grain lifting device 7 is disposed between the threshing device 3 and the grain tank 51. The grain tank 51 is supported rotatably with respect to the machine frame 10 around the vertical axis 51p at its rear end. A discharge auger 52 is used to discharge grains from the grain tank 51. The discharge auger 52 is configured to be rotatable in the up-down and left-right directions, and can discharge grains to any desired location.

The power unit 6 is provided below the driving section 13 and in front of the storage device 5. The power unit 6 is composed of an engine 61. In this embodiment, the engine 61 is a diesel engine that converts thermal energy obtained by burning fuel into kinetic energy. More specifically, the engine 61 converts thermal energy obtained by burning fuel into power that drives each section, 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.

The driver's section 13 is located on the right front part of the vehicle frame 10, in front of the grain tank 51. The driver's section 13 is covered by a cabin 14, behind which the grain tank 51 is located. Although not shown in the drawing, inside the cabin 14 are a driver's seat where the operator sits, a steering wheel located in front of the driver's seat, and various operating tools such as a gear shift lever, clutch lever, and switches are arranged around these. As shown in Figure 4, an engine 61 is located below the driver's section 13.

The engine 61 is connected to a precleaner 62 that filters the air supplied to the engine 61 while drawing in the air, and an air cleaner 63 that removes impurities from the drawn-in air. Both the precleaner 62 and the air cleaner 63 are located above the engine 61. The precleaner 62 is located behind the air cleaner 63 and on one side in the left-right direction of the cabin 14. The air cleaner 63 is biased toward the other side in the left-right direction in the gap formed between the engine 61 and the rear of the cabin 14. The precleaner 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 precleaner 62, and the lower end of the intake pipe 69 is connected to an opening provided at the rear of the air cleaner 63 on the one side in the left-right direction.

[Threshing device]
Next, the threshing device 3 will be described. As shown in FIG. 5, the threshing device 3 has a threshing chamber 30, a threshing drum 31, a receiving net 32, and a front rotor 33. The threshing chamber 30 is partitioned by the receiving net 32 and a machine frame 300. The machine frame 300 is fitted with an upper cover 301 arranged above the threshing drum 31, a front wall member 302 arranged in front of the threshing drum 31, and a rear wall member 303 arranged behind the threshing drum 31. The stalks transported by the transport conveyor 24 are sent into the threshing chamber 30 by the front rotor 33. The front rotor 33 not only transports the stalks, but also has the function of performing preliminary threshing (pre-threshing).

The threshing drum 31 has a threshing drum shaft 311 extending in the front-rear direction, a raking screw 312, and a tooth bar (threshing tooth support member) 313. The threshing drum 31 rotates around the threshing drum shaft 311. The threshing drum shaft 311 is supported rotatably by the front wall member 302 and the rear wall member 303. Rotational power is transmitted to the threshing drum shaft 311 from the engine 61. The threshing drum shaft 311 is a linearly formed structure, and supports the raking screw 312 and multiple tooth bars 313.

The raking screw 312 is disposed at the front of the threshing drum 31. The raking screw 312 is a structure in which a spiral impeller (raking blade) 312b is formed so as to be detachable. The raking screw 312 raks in the stalks sent in by the front rotor 33. In other words, by rotating, the raking screw 312 takes in the stalks sent in by the front rotor 33 and sends them out to the rear. The raking screw 312 is not limited to a structure in which a spiral impeller 312b is formed, and may be a structure in which multiple blades are formed.

A plurality of tooth bars 313 are arranged behind the threshing drum shaft 311. The tooth bar 313 is a structure in which a plurality of threshing teeth 313t are arranged parallel to each other at a predetermined interval. The tooth bar 313 threshes the stalks sent out by the threshing screw 312. In other words, the tooth bar 313 rotates to knead the stalks sent out by the threshing screw 312 and strike them to drop the threshed grain. The tooth bar 313 is not limited to a structure having a plurality of threshing teeth 313t, and may have a structure having a spiral blade. In this embodiment, the plurality of tooth bars 313 and the plurality of plate members 314 provided between each tooth bar 313 form a cylindrical rotating body as a whole, separating the internal space of the threshing drum 31 from the external space of the threshing drum 31, but instead, a cylindrical rotating body with a plurality of threshing teeth 313t may be used.

The receiving net 32 is provided along the lower outer peripheral surface of the threshing drum 31 and is formed in a roughly U-shape when viewed from the front-rear direction. In this embodiment, the receiving net 32 is arranged so as to cover the lower part of the rotating body formed by the multiple tooth bars 313. The receiving net 32 supports the stalks that are kneaded by the tooth bars 313. The receiving net 32 is mainly composed of 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 material that has been threshed by the threshing drum 31 to leak through the gaps in the net body 321. The stalks that do not leak through the receiving net 32 are discharged as waste stalks from the rear end of the receiving net 32.

The lifting device 7 is disposed behind the cabin 14, between the threshing device 3 and the grain tank 51. That is, the lifting device 7 is disposed to the right of the threshing device 3 and to the left of the grain tank 51. The lifting device 7 transports the threshed material (first processed material) processed by the threshing device 3 to the grain tank 51. As shown in FIG. 1, the lifting device 7 includes a bucket conveyor 71 and a lifting case 72 that houses the bucket conveyor 71 therein. The bucket conveyor 71 is provided with a pair of sprockets 711, 712 that are disposed at a distance in the vertical direction.

an endless chain 713 wound between them, and a plurality of buckets 714 attached to the chain 713.

[Sorting device]
Next, the sorting device 4 will be described. As shown in Fig. 5, the sorting device 4 includes a vibration sorting device 41 and a blower device 42. The vibration sorting device 41 sorts grains by sieving the threshed material. The blower device 42 blows away impurities such as straw dust contained in the threshed material to sort the grains.

The oscillating sorting device 41 has a feed pan 411, a chaff sieve 412, and a straw rack 413. The chaff sieve 412 is arranged at the lower rear of the feed pan 411, and the straw rack 413 is arranged behind the chaff sieve 412. The feed pan 411 is a wide, flat structure. The feed pan 411 receives the threshed material that has fallen from the receiving net 32. The feed pan 411 oscillates back and forth, moving the threshed material on the feed pan 411 to the rear while leveling it. At this time, the threshed material is spread evenly in the left and right directions by the diagonally attached fins 411f.

The chaff sieve 412 has a number of sieve plates 412p arranged parallel to each other at a predetermined interval. The number of sieve plates 412p are arranged in parallel in the front-rear direction while extending in the left-right direction. The angle of the sieve plates 412p can be adjusted according to the amount of threshed material. The chaff sieve 412 swings back and forth to sieve the threshed material sent from the feed pan 411, lifting up the mixed impurities and separating them from the grains. The threshed material selected by the chaff sieve 412 (the "first processed material" consisting of only grains) passes through the sieve net 416, is guided by the first grain flow plate 431, falls into the first trough 43, and is sent to the first conveyor 143. The threshed material remaining on the chaff sieve 412 moves backward and is sent to the straw rack 413.

The straw rack 413 has multiple rack plates 413p arranged parallel to each other at a specified interval. The straw rack 413 oscillates back and forth to sieve the threshed material sent from the chaff sieve 412, supporting the relatively large impurities mixed in and separating them from the grains. The threshed material sorted by the straw rack 413 (the "second processed material" consisting of grains and a few small impurities) is guided by the second grain flow plate 441 and falls into the second trough 44, and is sent by the second conveyor 144 and conveyed back to the front end of the sorting device 4 for further sorting. The threshed material remaining on the straw rack 413 is moved backward and discharged to the outside.

The blower 42 is disposed below the front of the oscillating sorting device 41 and supplies sorting air toward the oscillating sorting device 41. The blower 42 has a fan 421 and a fan case 422. In this 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 blow out air, thereby blowing away impurities placed on the chaff sieve 412 and the straw rack 413, as well as impurities that have fallen from them. 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 blown out by the fan 421 in a predetermined direction.

[Rear part of cabin]
As described above, the combine harvester 100 of this embodiment includes the grain tank 51 provided behind the cabin 14, the threshing device 3 provided adjacent to the grain tank 51 on one side in the left-right direction (on the left side in this embodiment), and the precleaner 62 arranged behind the cabin 14 and on one side in the left-right direction. Furthermore, as shown in Figs. 6 and 7, the combine harvester 100 includes an exhaust gas purifying device 9 provided between the grain tank 51 and the threshing device 3 and arranged below the precleaner 62. The exhaust gas purifying 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). The exhaust gas purifying device 9 may include a selective catalytic reduction (SCR) instead of or in addition to the DPF. When the exhaust gas purifying device 9 includes both the DPF and the SCR, they can be arranged in a left-right parallel arrangement, or in a vertical parallel arrangement, or in a front-to-rear series arrangement, with both facing the front-to-rear direction.

The left window 15 of the cabin 14 is supported via a hinge 15a so as to be freely rotatable up and down. An operator can open the left window 15 and lean backward from the driver's section 13 to perform maintenance such as cleaning on the rear part of the cabin 14. Both the precleaner 62 and the exhaust gas purification device 9 are located on one side of the left and right direction (i.e., the left side) at the rear of the cabin 14, and are also located above and below, so that they can be easily accessed at the same time. Therefore, work can be performed efficiently without changing the working posture, and the maintainability of the rear part of the cabin 14 is improved. In this embodiment, the exhaust gas purification device 9 is located directly below the precleaner 62 as shown in FIG. 6, and they are in an overlapping positional relationship in a plan view, which greatly improves the maintainability.

The combine harvester 100 of this embodiment is equipped with an outside air inlet 16w for introducing outside air into the air conditioning device 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 the wall portion 14L on one side of the cabin 14 in the left-right direction, and more specifically, is formed in the inclined surface 14a constituting the rear part of the wall portion 14L. Since the outside air inlet 16w is provided on the same left side as the precleaner 62 and the exhaust gas purification device 9, the collection filter 16f attached to the outside air inlet 16w can be easily accessed, further improving maintainability. In this embodiment, the precleaner 62 is arranged opposite the outside air inlet 16w, which greatly improves maintainability.

The air conditioning unit 16 is installed under the outer roof 14r that constitutes the upper outer surface of the cabin 14. The collection filter 16f is a mesh member for collecting dust contained in the outside air introduced through the outside air inlet 16w, and is made of, for example, punched metal. The outside of the outside air inlet 16w is covered with an introduction amount control plate 16p as shown in FIG. 4 (FIG. 7 shows the state in which the introduction amount control plate 16p has been removed). The introduction amount control plate 16p is attached to the wall portion 14L (the inclined surface 14a) so that there are gaps above and below. This allows outside air to flow in through the gaps above and below, and while increasing the area of the outside air inlet 16w, clogging of the collection filter 16f can be suppressed.

As shown in FIG. 8, the exhaust gas purification device 9 is covered with a cover member 90 to protect the exhaust gas purification device 9 from dust. However, on the other hand, since there is a concern that the exhaust gas purification device 9 may overheat, an opening is provided on the side of the cover member 90 to ensure ventilation. In this embodiment, the cover member 90 has a first opening 91 provided on the front side of the exhaust gas purification device 9 (i.e., the cabin 14 side) and a second opening 92 provided on one side of the exhaust gas purification device 9 in the left-right direction (i.e., the threshing device 3 side), and the former is formed smaller than the latter. Since the worker usually accesses the exhaust gas purification device 9 from the cabin 14 side and not from the threshing device 3 side, this allows both safety and ventilation to be achieved.

The cover member 90 has an upper surface portion 90u located above the exhaust gas purification device 9, a front side portion 90f located in front, and a right side portion 90r (see FIG. 6) located on the right side, and a number of first openings 91 are formed in the front side portion 90f. In FIG. 8, the first openings 91 are formed only in a partial area of the front side portion 90f, but in reality they are formed over almost the entire area of the front side portion 90f. The first openings 91 are preferably small holes large enough that a person's hand or fingers cannot enter.

As shown in FIG. 9, the cover member 90 has a third opening 93 provided on the other side in the left-right direction of the exhaust gas purification device 9 (i.e., the grain tank 51 side). The third opening 93 is formed smaller than the second opening 92. This improves safety when rotating the grain tank 51 laterally outward around the vertical axis 51p to open the right side of the threshing device 3 to perform maintenance work. A large number of third openings 93 are formed on the right side surface portion 90r of the cover member 90. In FIG. 9, the third openings 93 are formed only in a part of the right side surface portion 90r, but in reality, they are formed over almost the entire area of the right side surface portion 90r. It is preferable that the third openings 93 are small holes large enough that a person's hand or finger cannot enter.

The cover member 90 does not have a side surface that is located on the left side of the exhaust gas purification device 9, and the left side of the exhaust gas purification device 9 is entirely open via the second opening 92. This maximizes ventilation and allows heat to be dissipated efficiently. For the same reason, the cover member 90 does not have a side surface that is located behind the exhaust gas purification device 9, and the rear side of the exhaust gas purification device 9 is entirely open (see Figures 9 and 10). However, this is not limited to this, and for example, it is also possible to place the side surface of the cover member 90 on the left side of the exhaust gas purification device 9 and form a second opening larger than the first opening 91 on that side surface.

The exhaust gas purification device 9 has a tail pipe 94 that guides the exhaust gas that has passed through the exhaust gas purification device 9 to the outside of the machine. As shown in FIG. 10, the rear end 94b of the tail pipe 94 is supported in a position tilted to the left and is configured to guide the exhaust gas toward the upper part of the threshing device 3. This makes it possible to prevent the exhaust gas from being blown onto the threshing device 7 while maintaining the vertical distance from the discharge auger 52. The threshing device 7, which is 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 94b of the tail pipe 94 is supported by the connecting member 78. Furthermore, the rear end 94b of the tail pipe 94 is supported by the connecting member 78 via a support member 95.

The connecting member 78 is fixed to the threshing device 3 on one side in the left-right direction (i.e., the left side) with a bolt 78b, and is welded to the lifting case 72 on the other side in the left-right direction (i.e., the right side). Because the rear end 94b of the tail pipe 94 is supported by the connecting member 78, the large vibrations of the threshing device 3 caused by the rotation of the threshing drum 31 are not directly transmitted to the tail pipe 94, and the tail pipe 94 can be firmly supported. In addition, by supporting the tail pipe 94 with the connecting member 78 rather than directly with the lifting device 7, there is no need to worry about the fixing devices (e.g., bolts and nuts) used for the support interfering with the bucket conveyor 71 in the lifting case 72.

As shown in FIG. 6, a bulging portion 51s is formed at the rear of the grain tank 51, bulging toward one side in the left-right direction. For convenience of illustration, the bulging portion 51s is shown in transparency in FIG. 10. The bulging portion 51s is disposed behind the grain lifting device 7. The rear end 94e of the tail pipe 94 is disposed rearward of the rear end 7e of the grain lifting device 7 and forward of the most bulging portion 51e of the bulging portion 51s. This configuration is advantageous in preventing exhaust gas that has passed through the exhaust gas purification device 9 from being blown toward the grain lifting device 7 while improving the capacity of the grain tank 51.

[Power transmission mechanism]
11 to 13, the combine harvester 100 includes a power transmission mechanism 170 that transmits rotational power from the engine 61 to the drive shaft 17a of the compressor 17 of the air conditioning device 16. The power transmission mechanism 170 is a belt transmission mechanism that transmits the rotational power via a transmission belt 170b. The transmission belt 170b is stretched between the output shaft 61a of the engine 61 and the drive shaft 17a of the compressor 17. A tension roller 171 maintains the tension of the transmission belt 170b. A cooling fan 64 to which the rotational power is transmitted via a belt 64b is disposed above the output shaft 61a.

The combine harvester 100 further includes a power transmission mechanism 510 that transmits 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 input shaft 511. The rotational power from the engine 61 is transmitted from the output shaft 61a to the grain input 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 the lateral feed auger 57 that transports grains in the grain tank 51 horizontally.

The lower end of the vertical conveyor shaft 54 is interlocked to the rear end of the lower conveyor shaft 53 via a bevel gear mechanism 513. The rear end of the horizontal conveyor shaft 55 is interlocked to the upper end of the vertical conveyor shaft 54 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 feed auger 58 that transports the grains in the grain tank 51 upward, and the horizontal conveyor shaft 55 is the drive shaft of the discharge auger 52.

As shown in Figures 12 and 13, the compressor 17 is supported by an engine lateral frame 65 that extends in the left-right direction behind the engine 61. The compressor 17 is supported at its upper and lower parts, with the upper part of the compressor 17 fixed to an upper fixing member 66 welded to the engine lateral frame 65, and the lower part of the compressor 17 fixed to a lower fixing member 67 welded to the engine lateral frame 65. In addition, the rear end 172a of an arm 172 that supports a 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.

Between the output shaft 61a of the engine 61 and the Glenn input shaft 511, a Glenn clutch 56 is provided. The driving section 13 is provided with a Glenn clutch lever 18 for switching the Glenn clutch 56 (see FIG. 3). The Glenn 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 Glenn clutch lever 18 is connected to the rear end 562a of the arm 562 via a spring 563. The pivot point 562b of the arm 562 is supported by the engine vertical frame 68 that extends vertically at the right rear of the engine 61.

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 stretched is located outside (on the right side of the machine body) the pulley 510p around which the transmission belt 510b is stretched. Therefore, even if a problem such as the transmission belt 510b breaking occurs when driving the discharge auger 52 to discharge the grains in the grain tank 51, the belt parts can be easily replaced.

In this embodiment, an example of a normal combine harvester is shown, but this is not limited to this, and the present invention may also be applied to a head-feeding combine harvester.

The present invention is not limited to the above-described embodiment, and various improvements and modifications can be made without departing from the spirit and scope of the present invention.

Reference Signs List 3 Threshing device 7 Grain lifting device 9 Exhaust gas purification device 13 Driving section 14 Cabin 16 Air conditioning device 16f Collection filter 16w Outside air inlet 51 Grain tank 51e Most bulging portion 51s Bulging portion 61 Engine 62 Precleaner 78 Connecting member 90 Cover member 91 First opening 92 Second opening 93 Third opening 94 Tail pipe 94b Rear end portion 100 Combine harvester

Claims (5)

A grain tank is installed behind the control unit,
A precleaner arranged behind the steering unit and on one side in the left-right direction;
an exhaust gas purification device disposed behind the steering unit at a position overlapping with the precleaner and not overlapping with the grain tank in a plan view;
A combine harvester equipped with The combine harvester according to claim 1, further comprising a threshing device provided adjacent to the grain tank on one of the left and right sides, and the exhaust gas purification device is provided between the grain tank and the threshing device. The combine harvester according to claim 2, wherein a lifting device disposed between the grain tank and the threshing device is connected to the threshing device via a connecting member. The combine harvester according to claim 3, wherein the rear end of a tail pipe that guides exhaust gas that has passed through the exhaust gas purification device to the outside of the machine is supported by the connecting member. The combine harvester according to claim 4, wherein the rear end of the tail pipe is disposed rearward of the rear end of the grain lifting device.