JP7658926B2 - combine - Google Patents

Description

The present invention relates to a combine harvester.

One type of combine harvester known in the art has a cutting section at the front of the machine frame, and a threshing section and storage section behind the cutting section. The threshing section and storage section are located adjacent to each other on the left and right, and a control section is provided between the cutting section and storage section. An engine is located below the control section, and exhaust gases generated by the engine are discharged to the rear through an exhaust pipe that runs between the threshing section and storage section.

The exhaust pipe is fitted with an exhaust gas purification device equipped with a filter that removes particulate matter contained in the exhaust gas, but because high-temperature exhaust gas flows through the inside of the exhaust gas purification device, the surface temperature of the exhaust gas purification device also becomes as high as several hundred degrees Celsius. Therefore, if dust scattered from the stalks transported from the harvesting section to the threshing section accumulates on or near the exhaust gas purification device, it becomes necessary to take great care in removing the dust, which places a heavy burden on the worker.

Therefore, technologies to suppress the adhesion of dust to the exhaust gas purification device have been studied. For example, Patent Document 1 proposes covering the exhaust gas purification device with a cover member (shielding member). To achieve both safety and breathability, the cover member has a first opening provided on the front side of the exhaust gas purification device and a second opening provided on the threshing section side of the exhaust gas purification device.

JP 2019-217793 A

However, in the configuration described in Patent Document 1, dust can get inside the shielding member through the first and second openings and adhere to the exhaust gas purification device. Removing the adhered dust requires work from below the shielding member or removing the shielding member, which is more time-consuming than conventional methods.

Taking the above circumstances into consideration, the present invention aims to provide a combine harvester that can prevent dust from entering the exhaust gas purification device.

To solve the above problems, the combine harvester of the present invention is equipped with a threshing section provided on one side in the left-right direction, a storage section provided on the other side in the left-right direction, an engine provided in front of the storage section, an exhaust gas purification device provided between the threshing section and the storage section, and a shielding member that covers the upper side and the left and right sides of the exhaust gas purification device.

The portion of the shielding member that covers the side of the threshing unit may be joined to the outer surface of the threshing unit.

The combine may include a tailpipe connected to the rear end of the exhaust gas purification device, and the shielding member may cover at least the upper part of the tailpipe.

The tail pipe may be supported by the threshing unit, and the portion of the shielding member that covers the tail pipe may be supported by the tail pipe.

The shielding member may include an outer shielding member that covers the exhaust gas purification device and at least the upper part of the tail pipe, and an inner shielding member that is provided inside the outer shielding member and covers at least the upper part of the tail pipe.

The tail pipe may be supported by the threshing section, and the inner shielding member may be supported by the tail pipe.

The combine harvester may be provided with a grain conveying device disposed between the storage section and the tail pipe, which conveys grains from the threshing section to the storage section, and the portion of the shielding member facing the grain conveying device may be cut out.

The combine may be equipped with a sensor that detects pressure or temperature, and a sensor holding member that is supported by the threshing section and holds the sensor in a position that does not contact the exhaust gas purification device.

The present invention makes it possible to prevent dust from entering the exhaust gas purification device.

FIG. 1 is a left side view showing the appearance of a combine harvester according to one embodiment of the present invention. 1 is a plan view showing the appearance of a combine harvester according to one embodiment of the present invention. FIG. 1 is a plan view showing an exhaust gas purification device, an engine, a threshing section, and a storage section according to an embodiment of the present invention. 1 is a perspective view showing an exhaust gas purification device, an engine, and a threshing unit according to an embodiment of the present invention. FIG. 2 is a perspective view showing a storage section according to an embodiment of the present invention. 1 is a perspective view showing an exhaust gas purification device provided with a shielding member; FIG. 7 is a perspective view of FIG. 6 with the shielding member removed. FIG. An oblique view showing an exhaust gas purification device and a shielding member supported in the threshing section. This is an oblique view of Figure 9 with the outer shielding members (threshing section side shielding member, storage section side shielding member) and the front shielding member removed. FIG. 11 is a perspective view of FIG. 10 with the inner shielding member removed. FIG. 4 is a perspective view showing a second connecting member. An oblique view showing an exhaust gas purification device and a shielding member supported in the threshing section. FIG. FIG. 4 is a perspective view showing an inner shielding member. 4 is a rear view showing an exhaust gas purification device provided with a shielding member. FIG.

Below, we will explain a combine harvester 1 according to one embodiment of the present invention with reference to the drawings.

[Overview of the Combine]
First, an overview of the combine harvester 1 will be described. Fig. 1 is a left side view showing the exterior of the combine harvester 1. Fig. 2 is a plan view showing the exterior of the combine harvester 1. Fig. 3 is a plan view showing the exhaust gas purification device 32, the engine 27, the threshing section 4, and the storage section 6. Fig. 4 is a perspective view showing the exhaust gas purification device 32, the engine 27, and the threshing section 4. Fig. 5 is a perspective view showing the storage section 6. In each figure, U, Lo, L, R, Fr, and Rr indicate up, down, left, right, front, and rear, respectively.

The combine harvester 1 (see Figs. 1 and 2) comprises a travel section 2, a reaping section 3, a threshing section 4, a sorting section 5, a storage section 6, a power section 8, and a steering section 9. While traveling on the travel section 2, the combine harvester 1 threshes the stalks harvested by the reaping section 3 in the threshing section 4, sorts the grains in the sorting section 5, and stores them in the storage section 6. The combine harvester 1 drives the travel section 2, the reaping section 3, the threshing section 4, the sorting section 5, and the storage section 6 by the power supplied from the power section 8. Note that, in this embodiment, an example of a normal type combine harvester will be described, but the present invention may also be applied to a head-feeding type combine harvester.

The running section 2 is provided below the machine frame 10. The harvesting section 3 is provided in front of the machine frame 10. The threshing section 4, sorting section 5, storage section 6, power section 8, and steering section 9 are provided above the machine frame 10.

The traveling section 2 is equipped with a pair of left and right crawler-type traveling devices 11 provided below the machine frame 10. The crawler-type traveling devices 11 rotate by the power generated by the power section 8. The rotational drive of the left and right crawler-type traveling devices 11 is independently controlled to move forward, backward, and turn.

The reaping unit 3 (see Figure 1) is provided in front of the traveling unit 2. The reaping unit 3 has a reel 13, a cutter 14, an auger 15, and a conveyor 16. The reel 13 rotates to guide the culms in the field to the cutter 14. The cutter 14 cuts the culms guided by the reel 13. The auger 15 collects the culms cut by the cutter 14 on the conveyor 16. The conveyor 16 transports the culms collected by the auger 15 to the threshing unit 4.

The threshing section 4 (see Figures 2 and 3) is located behind the reaping section 3 and on one side in the left-right direction (the left side in this embodiment). The threshing section 4 (see Figure 4) includes a threshing machine frame 81 and a rotor cover 82. The threshing machine frame 81 is box-shaped with an open top. The threshing machine frame 81 houses a threshing drum 19 and a receiving net 20 (see Figure 1). The rotor cover 82 has a trapezoidal cross section when viewed from the front-to-rear direction. The rotor cover 82 covers the top of the threshing machine frame 81. The threshing drum 19 rotates to transport the stalks backward while threshing them. The receiving net 20 supports the stalks transported by the threshing drum 19 and drops the threshed material into the sorting section 5.

A step 83 and a lip 84 are provided on the lower right side of the rotor cover 82 (see FIG. 4). The step 83 has a horizontal portion that protrudes to the right from the lower end of the slope on the right side of the rotor cover 82, and a vertical portion that protrudes downward from the right end of the horizontal portion. In this example, two step portions 83 are provided, but one or three or more step portions 83 may be provided. The lip 84 protrudes to the right from the lower end of the step 83.

The sorting section 5 (see FIG. 1) is provided below the threshing section 4. The sorting section 5 includes a oscillating sorting device 21 and a wind sorting device 22. The oscillating sorting device 21 includes a oscillating sieve and separates the threshed grains that have fallen from the threshing section 4 into grains and straw chips. The wind sorting device 22 blows away impurities such as straw chips contained in the threshed grains that have been sorted by the oscillating sorting device 21. The impurities are discharged to the outside from a discharge outlet (not shown) provided behind the sorting section 5.

The storage section 6 (see Figures 1 to 3 and 5) is provided to the right of the threshing section 4. The storage section 6 is equipped with a grain transport device 91, a grain tank 24, and a discharge device 25. The grain transport device 91 transports the grains sorted by the vibration sorting device 21 and the wind sorting device 22 to the grain tank 24. The grain tank 24 stores the grains transported by the grain transport device 91. The discharge device 25 discharges the grains stored in the grain tank 24 to any desired location.

The grain conveying device 91 (see FIG. 5) includes a screw-type, bucket-type, or other conveyor (not shown), and a casing 92 that houses the conveyor. The casing 92 is cylindrical with the vertical direction as the longitudinal direction, and is connected at its lower end to the sorting section 5 and at its upper end to the grain tank 24. In this embodiment, the casing 92 is cylindrical in shape to show an example in which the conveyor is of the screw type. If the conveyor is of the bucket type, the casing 92 is rectangular.

The discharge device 25 (see Figs. 1 and 2) comprises a vertical tube section 251 whose longitudinal direction is the up-down direction, and a horizontal tube section 252 whose longitudinal direction is the horizontal direction. The lower end of the vertical tube section 251 is connected to the grain tank 24. One end of the horizontal tube section 252 is connected to the upper end of the vertical tube section 251. An auger (not shown) is provided inside the vertical tube section 251 and the horizontal tube section 252. The discharge device 25 can rotate around the vertical tube section 251 as an axis. In addition, the grain tank 24 can rotate left and right around the vertical tube section 251 as shown by the two-dot chain line in Fig. 2. Rotating the grain tank 24 to the right improves the workability of maintenance.

The power unit 8 (see Figures 1 and 3) is provided above the front of the traveling unit 2 and in front of the storage unit 6. The power unit 8 has an engine 27 that generates power. The engine 27 is, for example, a diesel engine. The power unit 8 transmits the power generated by the engine 27 to the traveling unit 2, the reaping unit 3, the threshing unit 4, the sorting unit 5, and the storage unit 6.

The control unit 9 (see Figures 1 and 2) is provided above the power unit 8. The control unit 9 includes a driver's seat, a terminal equipped with a touch panel, and multiple operation units (not shown). The terminal serves as both a display unit that displays images, etc., and an operation unit that accepts operations for the combine harvester 1. The multiple operation units are operated by an operator seated in the driver's seat, and include a handle that controls the steering of the combine harvester 1, an accelerator that adjusts the rotation speed of the engine 27 (the running speed of the combine harvester 1), a lift switch that raises and lowers the harvesting unit 3, etc.

Next, the exhaust gas purification device 32 and the shielding member 51 will be described (see Figs. 3 to 16). Fig. 6 is a perspective view showing the exhaust gas purification device 32 provided with the shielding member 51. Fig. 7 is a perspective view showing Fig. 6 without the shielding member 51. Fig. 8 is an exploded view showing the shielding member 51. Fig. 9 is a perspective view showing the exhaust gas purification device 32 and the shielding member 51 supported by the threshing section 4. Fig. 10 is a perspective view showing Fig. 9 without the outer shielding member (threshing section side shielding member 52, storage section side shielding member 53) and the front shielding member 56. Fig. 11 is a perspective view showing Fig. 10 without the inner shielding member 57. Fig. 12 is a perspective view showing the second connecting member 72. Fig. 13 is a perspective view showing the exhaust gas purification device 32 and the shielding member 51 supported by the threshing section 4. Fig. 14 is a perspective view showing the tail pipe 41. Fig. 15 is a perspective view showing the inner shielding member 57. FIG. 16 is a rear view showing the exhaust gas purification device 32 equipped with a shielding member 51.

The combine harvester 1 is equipped with a threshing section 4 provided on one side in the left-right direction, a storage section 6 provided on the other side in the left-right direction, an engine 27 provided in front of the storage section 6, an exhaust gas purification device 32 provided between the threshing section 4 and the storage section 6, and a shielding member 51 that covers the top and both left and right sides of the exhaust gas purification device 32. The details are as follows. The threshing section 4 and the storage section 6 are as described above. The following mainly describes the engine 27, the exhaust gas purification device 32, and the shielding member 51.

[engine]
The engine 27 (see FIG. 4 ) includes a crankcase 27C, a cylinder block 27B, a cylinder head 27H, and an exhaust manifold 27E. An exhaust pipe 31 is connected to the exhaust manifold 27E. The exhaust pipe 31 guides exhaust gas generated by the engine 27 to an exhaust gas purification device 32. An engine room frame 37 is provided between the engine 27 and the storage section 6. The engine room frame 37 is a part of the engine room that houses the engine 27. The engine room frame 37 is formed by combining columnar, beam, plate, and other members. The engine room frame 37 functions as a partition wall that separates the engine 27 from the storage section 6, and also functions to support the exhaust gas purification device 32 and the shielding member 51.

[Exhaust gas purification device]
The exhaust gas purification device 32 (see Figs. 3 and 4) is provided between the threshing section 4 and the storage section 6 in the left-right direction. In addition, the exhaust gas purification device 32 is provided between the engine 27 and the grain conveying device 91 in the front-rear direction. In addition, the exhaust gas purification device 32 is provided above the engine 27 in the up-down direction.

The exhaust gas purification device 32 (see Figures 7 and 11) has a cylindrical housing 33 that houses a DPF (Diesel Particulate Filter, not shown). The housing 33 is arranged with its longitudinal direction in the front-to-rear direction. A flange portion 34 that protrudes radially from the outer periphery of the housing 33 over the entire circumference is provided at the rear of the housing 33. An exhaust pipe 31 is connected to the bottom of the front side of the housing 33. A tail pipe 41 is connected to the rear end of the housing 33.

Exhaust gas generated by the engine 27 is guided to the exhaust gas purification device 32 via the exhaust pipe 31. The DPF purifies the exhaust gas by collecting particulate matter contained in the exhaust gas. The purified exhaust gas is discharged into the atmosphere via the tail pipe 41.

The housing rear support member 36 (Figs. 9, 10, 11, 13) is connected to the flange portion 34 using bolts. The housing rear support member 36 is connected to the thresher frame 81 by a first connecting member 71. The front end of the housing 33 is connected to the engine room frame 37 (see Fig. 4) by the housing front first support member 35 and the housing front second support member 38 (see Figs. 6 and 8). In other words, the housing 33 is supported by the thresher frame 81 and the engine room frame 37.

The housing rear support member 36 is a plate-like member having a vertical portion perpendicular to the front-to-rear direction and a horizontal portion bent rearward from the lower end of the vertical portion. The first connecting member 71 is a plate-like member having a horizontal portion and a vertical portion bent upward from the rear end of the horizontal portion. The left end of the first connecting member 71 is connected to the threshing machine frame 81 by welding. The horizontal portion of the housing rear support member 36 is connected to the horizontal portion of the first connecting member 71 using a bolt.

The housing front first support member 35 and the housing front second support member 38 are plate-shaped members having a vertical portion perpendicular to the front-to-rear direction and a horizontal portion bent forward from the lower end of the vertical portion. The vertical portion of the housing front first support member 35 is connected to the front end surface of the housing 33 using bolts (not shown). The horizontal portion of the housing front first support member 35 and the horizontal portion of the housing front second support member 38 are connected to the engine room frame 37 using bolts (not shown).

The tail pipe 41 (see FIG. 14) includes an outer pipe 42 and an inner pipe 45 having a smaller diameter than the outer pipe 42. The inner pipe 45 is housed inside the outer pipe 42. The front end of the inner pipe 45 protrudes forward from the front end of the outer pipe 42. The inner pipe 45 is connected to an exhaust port 33E (see FIG. 16) provided at the rear end of the housing 33. A gap is provided between the outer peripheral surface of the inner pipe 45 and the inner peripheral surface of the outer pipe 42. When exhaust gas is discharged, outside air is introduced through the gap between the inner pipe 45 and the outer pipe 42 to cool the exhaust gas and the tail pipe 41.

The outer pipe 42 of the tail pipe 41 has a straight pipe section along the front-rear direction and a curved section that curves from the rear end of the straight pipe section to the upper left. A tail pipe front support member 43 that supports the front part of the straight pipe section and a tail pipe rear support member 44 that supports the rear part of the straight pipe section are welded to the lower part of the straight pipe section. The tail pipe front support member 43 is connected to the thresher frame 81 by a first connecting member 71. The tail pipe rear support member 44 is connected to the thresher frame 81 by a second connecting member 72. In other words, the tail pipe 41 is supported by the thresher section 4.

The tailpipe front support member 43 is a plate-shaped member having a vertical portion perpendicular to the front-rear direction and side portions bent rearward from the left and right ends of the vertical portion. The vertical portion of the tailpipe front support member 43 is connected to the vertical portion of the first connecting member 71 using a bolt.

The tail pipe rear support member 44 is a plate-like member having a vertical portion perpendicular to the front-rear direction, side portions bent rearward from the left and right ends of the vertical portion, and a horizontal portion bent rearward from the lower end of the vertical portion. The second connecting member 72 (see FIG. 12) is a plate-like member having a horizontal portion 73 and a vertical portion 74 bent upward from the front and rear ends of the horizontal portion 73. The left end of the horizontal portion 73 of the second connecting member 72 is connected to the lip portion 84 of the rotor cover 82 using a bolt. The horizontal portion of the tail pipe rear support member 44 is connected to the horizontal portion 73 of the second connecting member 72 using a bolt.

The right end of the horizontal portion 73 of the second connecting member 72 is provided with a notch 77 that is cut in an arc shape along the outer circumferential surface of the casing 92 of the grain conveying device 91. When the storage section 6 is in the position shown by the solid line in Figure 2, the casing 92 is accommodated in the notch 77.

A long hole 75 with its longitudinal direction extending in the front-to-rear direction is provided on the left end side of the horizontal portion 73 of the second connecting member 72. The second connecting member 72 is connected to the lip portion 84 via the long hole 75 using a bolt. Therefore, the position of the second connecting member 72 can be adjusted in the front-to-rear direction relative to the lip portion 84.

A long hole 76 with its longitudinal direction extending in the front-rear direction is provided in the center of the horizontal portion 73 of the second connecting member 72. The horizontal portion of the tail pipe rear support member 44 is connected to the horizontal portion 73 of the second connecting member 72 via the long hole 76 using a bolt. Therefore, the position of the second connecting member 72 can be adjusted in the front-rear direction relative to the tail pipe rear support member 44.

In this way, the position of the second connecting member 72 can be adjusted in the fore-aft direction relative to the lip portion 84 and the tail pipe rear support member 44, so that unnecessary loads are not applied to the casing 92 or the tail pipe 41. Even if the relative positional relationship between the threshing section 4 and the storage section 6 shifts due to aging or other reasons, the casing 92 and the tail pipe 41 can be protected by adjusting the fore-aft position of the second connecting member 72.

[Shielding member]
The shielding member 51 (see Figs. 6 to 11, 13, and 16) includes a threshing section side shielding member 52, a storage section side shielding member 53, a front shielding member 56, and an inner shielding member 57. The threshing section side shielding member 52 and the storage section side shielding member 53 are examples of outer shielding members. The shielding member 51 is formed using a plate-shaped member such as metal or resin.

The threshing section side shielding member 52 covers the side and the upper side of the threshing section 4 of the exhaust gas purification device 32. The threshing section side shielding member 52 does not have an opening. The threshing section side shielding member 52 has a side portion perpendicular to the left-right direction and an inclined portion inclined from the upper end of the side portion to the upper right. The upper end of the inclined portion reaches directly above the housing 33. The threshing section side shielding member 52 is provided in a range from the front end of the housing 33 to the straight pipe portion of the tail pipe 41. The lower end of the side portion of the threshing section side shielding member 52 is joined to the step portion 83 of the rotor cover 82 (see FIG. 16). In other words, the threshing section side shielding member 52 is supported by the threshing section 4. There is no gap through which dust can enter between the lower end of the side portion of the threshing section side shielding member 52 and the step portion 83 of the rotor cover 82. Dust accumulates in the valley-shaped space formed by the rotor cover 82 and the threshing section side shielding member 52, so it can be easily removed. The lower end of the side of the threshing section side shielding member 52 may be joined to the lip portion 84 of the rotor cover 82.

The storage unit side shielding member 53 covers the sides and the top of the storage unit 6 side of the exhaust gas purification device 32. The storage unit side shielding member 53 has a side portion perpendicular to the left-right direction and an inclined portion inclined from the upper end of the side portion to the upper left. The upper end of the inclined portion reaches directly above the housing 33. The storage unit side shielding member 53 is provided in a range from the front end to the rear end of the housing 33. In other words, the shielding member 51 has a cutout in the portion facing the grain conveying device 91. Therefore, the shielding member 51 does not interfere with the grain conveying device 91.

The storage section side shielding member 53 is supported by a front frame 54 and a rear frame 55. The front frame 54 and the rear frame 55 are belt-shaped members that are shaped to fit the inner surface of the storage section side shielding member 53. The front frame 54 and the rear frame 55 are integrated with the storage section side shielding member 53 by welding. The lower end of the front frame 54 is connected to the housing front first support member 35. The lower end of the rear frame 55 is connected to the flange portion 34 of the housing 33. That is, the storage section side shielding member 53 is supported by the engine room frame 37 and the threshing section 4. The upper end of the front frame 54 and the upper end of the rear frame 55 are connected to the inclined portion of the threshing section side shielding member 52. Therefore, the threshing section side shielding member 52 and the storage section side shielding member 53 have an arch-shaped structure as a whole.

The front shielding member 56 (see FIG. 8) covers the front of the exhaust gas purification device 32. The front shielding member 56 faces the front end surface of the housing 33. The front shielding member 56 does not have an opening. The lower part of the front shielding member 56 is connected to the housing front first support member 35. In other words, the front shielding member 56 is supported by the engine room frame 37. A heat shielding plate 561 is provided between the front shielding member 56 and the housing 33. A heat insulating material 562 is provided between the front shielding member 56 and the heat shielding plate 561. The storage section side front shielding member 563 has a shape that follows the front shielding member 56 and the storage section side shielding member 53, and covers the joint between the front shielding member 56 and the storage section side shielding member 53.

The temperature is highest near the connection between the tail pipe 41 and the housing 33, so in order to reduce the transfer of heat to the outer shielding members (threshing section side shielding member 52, storage section side shielding member 53) near the connection, an inner shielding member 57 is provided inside the outer shielding member (see Figures 7, 10, 15, and 16). The inner shielding member 57 is a plate-shaped member curved concentrically with the housing 33. The inner diameter of the inner shielding member 57 is slightly larger than the outer diameter of the housing 33. It is desirable that the front end of the inner shielding member 57 is located forward of the rear end of the housing 33. It is desirable that the rear end of the inner shielding member 57 is located rearward of the front end of the outer tube 42 of the tail pipe 41.

The inner shielding member 57 (see FIG. 16) is provided in a range corresponding to at least the outer shielding member in the circumferential direction. In other words, the inner shielding member 57 is provided in a wider range in the circumferential direction than the outer shielding member. Specifically, on the threshing section 4 side, the lower end of the inner shielding member 57 is located lower than the lower end of the threshing section side shielding member 52. On the storage section 6 side, the lower end of the inner shielding member 57 is located lower than the lower end of the storage section side shielding member 53.

The inner shielding member 57 is provided with stays 58 protruding from the inner surface of the inner shielding member 57. In this example, the stays 58 are provided in three locations, above, to the left, and to the right when viewed from the center of the tail pipe 41. The tail pipe 41 (see FIG. 14) is provided with stays 46 protruding from the outer surface of the inner pipe 45 at positions corresponding to the stays 58 of the inner shielding member 57. The stays 58 of the inner shielding member 57 are connected to the stays 46 of the tail pipe 41 using bolts. The inner shielding member 57 is positioned so as not to come into contact with the surface of the housing 33. A predetermined range of gap is secured between the inner shielding member 57 and the surface of the housing 33.

[sensor]
The sensor holding member 63 is a rod-shaped member having a shape that fits along the inner surface of the threshing section side shielding member 52. The sensor holding member 63 is provided at a position corresponding to the rear frame 55 in the front-rear direction. The lower end of the sensor holding member 63 is connected to the step portion 83 of the rotor cover 82. The sensor holding member 63 is not in contact with the threshing section side shielding member 52 and the housing 33. The upper end of the sensor holding member 63 is connected to the upper part of the rear frame 55 via a plate-shaped stay connection portion 64. In other words, the sensor holding member 63 and the rear frame 55 have an arch-shaped structure as a whole.

A plate-shaped sensor plate 62 is provided on the upper part of the sensor holding member 63. A sensor 61 is attached to the sensor plate 62. A detection element (not shown) that detects the pressure, temperature, etc. of the DPF is provided in the housing 33. The sensor 61 and the detection element are connected by a signal line (not shown). The detection element outputs a signal indicating the detected pressure, temperature, etc. to the sensor 61. The sensor 61 amplifies the signal output by the detection element and transmits it to an ECU (Engine Control Unit, not shown). The sensor 61 and the sensor plate 62 are not in contact with the housing 33, the threshing section side shielding member 52, and the storage section side shielding member 53.

The combine harvester 1 according to the present embodiment described above includes a threshing section 4 provided on one side in the left-right direction, a storage section 6 provided on the other side in the left-right direction, an engine 27 provided in front of the storage section 6, an exhaust gas purification device 32 provided between the threshing section 4 and the storage section 6, and a shielding member 51 that covers the top and left and right sides of the exhaust gas purification device 32. With this configuration, it is possible to prevent dust from entering the exhaust gas purification device 32, compared to a case in which the shielding member 51 has an opening on the side on the threshing section 4 side.

In addition, in the combine harvester 1 according to this embodiment, the portion of the shielding member 51 that covers the side of the threshing section 4 is joined to the outer surface of the threshing section 4. This configuration makes it possible to prevent dust from entering through the gap between the shielding member 51 and the threshing section 4. In addition, since dust accumulates between the shielding member 51 and the threshing section 4, it can be easily removed.

The combine harvester 1 according to this embodiment is equipped with a tail pipe 41 connected to the rear end of the exhaust gas purification device 32, and the shielding member 51 covers at least the upper part of the tail pipe 41. This configuration can prevent dust from adhering to the tail pipe 41 and from entering the exhaust gas purification device 32 from the rear.

In addition, in the combine harvester 1 according to this embodiment, the tail pipe 41 is supported by the threshing section 4, and the portion of the shielding member 51 that covers the tail pipe 41 (the inner shielding member 57) is supported by the tail pipe 41. With this configuration, the distance between the tail pipe 41 and the exhaust gas purification device 32 and the shielding member 51 can be appropriately maintained.

In addition, in the combine harvester 1 according to this embodiment, the shielding member 51 includes an outer shielding member (threshing section side shielding member 52, storage section side shielding member 53) that covers the exhaust gas purification device 32 and at least the upper part of the tail pipe 41, and an inner shielding member 57 that is provided inside the outer shielding member and covers at least the upper part of the tail pipe 41. This configuration makes it difficult for heat to be transmitted from the tail pipe 41 to the outer shielding member. In addition, the intrusion of dust from behind the exhaust gas purification device 32 can be further suppressed.

In addition, in the combine harvester 1 according to this embodiment, the tail pipe 41 is supported by the threshing section 4, and the inner shielding member 57 is supported by the tail pipe 41. With this configuration, the distance between the tail pipe 41 and the exhaust gas purification device 32 and the inner shielding member 57 can be appropriately maintained.

The combine harvester 1 according to this embodiment is provided with a grain transport device 91 that is provided between the storage section 6 and the tail pipe 41 and transports grains from the threshing section 4 to the storage section 6, and the portion of the shielding member 51 that faces the grain transport device 91 is cut out. With this configuration, interference between the shielding member 51 and the grain transport device 91 is avoided, so the width of the combine harvester 1 in the left-right direction can be reduced.

The combine harvester 1 according to this embodiment is equipped with a sensor 61 that detects pressure or temperature, and a sensor holding member 63 that is supported by the threshing section 4 and holds the sensor 61 in a position that does not contact the exhaust gas purification device 32. With this configuration, compared to when the sensor 61 is in contact with the exhaust gas purification device 32, the heat of the exhaust gas purification device 32 is less likely to be transmitted to the sensor 61, so the deterioration of the accuracy of the sensor 61 due to heat is suppressed. Conventionally, an opening is provided in the shielding member 51 to introduce outside air to suppress the temperature rise of the sensor 61, but in this embodiment, there is no need to provide an opening in the shielding member 51, so it is possible to suppress the intrusion of dust into the inside of the shielding member 51.

The above embodiment may be modified as follows:

In the above embodiment, an example is shown in which the threshing section side shielding member 52 is provided in the range from the front end of the housing 33 to the straight pipe section of the tail pipe 41, but the threshing section side shielding member 52 may be provided in the range from the front end of the housing 33 to the entire tail pipe 41. With this configuration, it is possible to further suppress adhesion of dust to the tail pipe 41 and entry of dust into the exhaust gas purification device 32 from the rear.

In the above embodiment, an example in which the inner shielding member 57 is provided is shown, but the inner shielding member 57 does not have to be provided. In that case, the part of the outer shielding member that covers the tail pipe 41 may be supported by the tail pipe 41. With this configuration, the distance between the tail pipe 41 and the exhaust gas purification device 32 and the shielding member 51 can be appropriately maintained.

In the above embodiment, an example was shown in which the threshing section side shielding member 52 and the front shielding member 56 do not have an opening, but either the threshing section side shielding member 52 or the front shielding member 56 may have an opening. Even with this configuration, it is possible to prevent dust from entering the exhaust gas purification device 32 compared to when the shielding member 51 has openings in the front and on the side of the threshing section 4.

1 Combine harvester 4 Threshing section 6 Storage section 27 Engine 32 Exhaust gas purification device 41 Tail pipe 51 Shielding member 52 Threshing section side shielding member (outer shielding member)
53 Storage section side shielding member (outer shielding member)
57 Inner shielding member 61 Sensor 63 Sensor holding member 91 Grain conveying device

Claims (7)

A threshing section provided on one side in the left-right direction;
A storage section provided on the other side in the left-right direction;
An engine provided in front of the storage section;
An exhaust gas purification device provided between the threshing unit and the storage unit;
a shielding member that covers an upper portion and left and right sides of the exhaust gas purification device ,
A combine harvester characterized in that the portion of the shielding member covering the side of the threshing section is joined to the outer surface of the threshing section . A tail pipe is connected to a rear end of the exhaust gas purification device,
The combine harvester according to claim 1 , wherein the shielding member covers at least an upper portion of the tail pipe. The tail pipe is supported by the threshing section,
3. The combine harvester according to claim 2 , wherein a portion of the shielding member covering the tail pipe is supported by the tail pipe. The shielding member is
an outer shielding member that covers the exhaust gas purification device and at least an upper portion of the tail pipe;
The combine harvester according to claim 2 or 3 , further comprising: an inner shielding member provided inside the outer shielding member and covering at least an upper portion of the tail pipe. The tail pipe is supported by the threshing section,
The combine harvester according to claim 4 , wherein the inner shielding member is supported by the tail pipe. A grain conveying device is provided between the storage section and the tail pipe and conveys grains from the threshing section to the storage section,
The combine harvester according to any one of claims 2 to 5 , wherein a portion of the shielding member facing the grain transporting device is cut out. A sensor for detecting pressure or temperature;
A combine harvester as described in any one of claims 1 to 6 , characterized in that it is provided with a sensor holding member supported by the threshing section and holding the sensor in a position not in contact with the exhaust gas purification device.

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