combine

Abstract

To suppress dust intrusion into an exhaust gas purification device.SOLUTION: A combine 1 includes a threshing part 4 provided on one side in the longitudinal direction, a storage part 6 provided on the other side in the longitudinal direction, an engine 27 provided in front of the storage part 6, an exhaust gas purification device 32 provided between the threshing part 4 and the storage part 6, and a shielding member 51 for covering the upper side and right and left lateral sides of the exhaust gas purification device 32. A part for covering the lateral side of the threshing part 4 of the shielding member 51 is bonded to the outer surface of the threshing part 4.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to a combine harvester. [Background technology]

[0002] One type of combine harvester is known to have a cutting section at the front of the machine frame, and a threshing section and a storage section behind the cutting section. The threshing section and the storage section are located adjacent to each other on the left and right, and a control section is provided between the cutting section and the storage section. An engine is provided below the control section, and exhaust gas generated by the engine is discharged to the rear through an exhaust pipe that passes between the threshing section and the storage section.

[0003] The exhaust pipe is equipped 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 inside 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 reaping section to the threshing section accumulates on or near the exhaust gas purification device, it becomes necessary to pay close attention to the work of removing the dust, which places a heavy burden on the worker.

[0004] Therefore, conventionally, techniques for suppressing adhesion of dust to the exhaust gas purification device have been considered. For example, Patent Document 1 proposes covering the exhaust gas purification device with a cover member (shielding member). In order 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. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2019-217793 A Summary of the Invention [Problem to be solved by the invention]

[0006] However, in the configuration described in Patent Document 1, dust may enter the inside of 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 by removing the shielding member, which is more time-consuming than conventional methods.

[0007] In consideration of the above circumstances, the present invention has an object to provide a combine harvester that can suppress the intrusion of dust into an exhaust gas purification device. [Means for solving the problem]

[0008] In order to solve the above problems, the combine of the present invention comprises 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 covering the top and the left and right sides of the exhaust gas purification device.

[0009] The portion of the shielding member covering the side facing the threshing unit may be joined to the outer surface of the threshing unit.

[0010] The combine may include a tailpipe connected to a rear end of the exhaust gas purification device, and the shielding member may cover at least an upper portion of the tailpipe.

[0011] The tail pipe may be supported by the threshing section, and the portion of the shielding member covering the tail pipe may be supported by the tail pipe.

[0012] 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.

[0013] The tail pipe may be supported by the threshing section, and the inner shielding member may be supported by the tail pipe.

[0014] The combine may be provided with a grain conveying device arranged between the storage section and the tail pipe for transporting grains from the threshing section to the storage section, and a portion of the shielding member facing the grain conveying device may be cut out.

[0015] 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. Effect of the Invention

[0016] According to the present invention, it is possible to suppress the intrusion of dust into the exhaust gas purification device. [Brief description of the drawings]

[0017] [Figure 1] FIG. 1 is a left side view showing the appearance of a combine harvester according to one embodiment of the present invention. [Diagram 2] 1 is a plan view showing the appearance of a combine harvester according to one embodiment of the present invention. FIG. [Diagram 3] 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. [Figure 4] 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. [Diagram 5] FIG. 2 is a perspective view showing a storage section according to an embodiment of the present invention. [Figure 6] 1 is a perspective view showing an exhaust gas purification device provided with a shielding member; [Figure 7] FIG. 7 is a perspective view of FIG. 6 with the shielding member removed. [Figure 8] FIG. [Figure 9] An oblique view showing an exhaust gas purification device and a shielding member supported in the threshing section. [Figure 10] FIG. 10 is a perspective view of FIG. 9 from which the outer shielding members (threshing section side shielding member, storage section side shielding member) and the front shielding member are removed. [Figure 11] FIG. 11 is a perspective view of FIG. 10 with an inner shielding member removed. [Figure 12] FIG. 4 is a perspective view showing a second connecting member. [Figure 13] An oblique view showing an exhaust gas purification device and a shielding member supported in the threshing section. [Figure 14] FIG. [Figure 15] FIG. 4 is a perspective view showing an inner shielding member. [Figure 16] 4 is a rear view showing an exhaust gas purification device provided with a shielding member. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0018] Hereinafter, a combine harvester 1 according to one embodiment of the present invention will be described with reference to the drawings.

[0019] [Combine Overview] 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.

[0020] The combine harvester 1 (see Figs. 1 and 2) comprises a traveling 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 traveling 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 traveling section 2, the reaping section 3, the threshing section 4, the sorting section 5, and the storage section 6 by 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.

[0021] The traveling section 2 is provided below the machine frame 10. The reaping section 3 is provided in front of the machine frame 10. The threshing section 4, the sorting section 5, the storage section 6, the power section 8 and the steering section 9 are provided above the machine frame 10.

[0022] 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 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.

[0023] The reaping unit 3 (see FIG. 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 guides the culms in the field to the cutter 14 by rotating. 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.

[0024] The threshing section 4 (see Figures 2 and 3) is disposed behind the reaping section 3 and on one side in the left-right direction (on 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-rear direction. The rotor cover 82 covers the top of the threshing machine frame 81. The threshing drum 19 rotates to transport the stalks rearward 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.

[0025] A step portion 83 and a lip portion 84 are provided at the lower right portion of the rotor cover 82 (see FIG. 4). The step portion 83 has a horizontal portion protruding rightward from the lower end of the slope on the right side of the rotor cover 82, and a vertical portion protruding 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 portion 84 protrudes rightward from the lower end of the step portion 83.

[0026] 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, straw chips, etc. The wind sorting device 22 blows away impurities such as straw chips contained in the threshed grains 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.

[0027] The storage section 6 (see Figures 1 to 3, 5) is provided to the right of the threshing section 4. The storage section 6 is equipped with a grain conveying device 91, a grain tank 24, and a discharge device 25. The grain conveying device 91 conveys 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 conveying device 91. The discharge device 25 discharges the grains stored in the grain tank 24 to any desired location.

[0028] 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 tubular 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. In the case in which the conveyor is of the bucket type, the casing 92 is rectangular parallelepiped in shape.

[0029] The discharge device 25 (see Figs. 1 and 2) includes a vertical cylinder portion 251 whose longitudinal direction is the up-down direction, and a horizontal cylinder portion 252 whose longitudinal direction is the horizontal direction. The lower end of the vertical cylinder portion 251 is connected to the grain tank 24. One end of the horizontal cylinder portion 252 is connected to the upper end of the vertical cylinder portion 251. An auger (not shown) is provided inside the vertical cylinder portion 251 and the horizontal cylinder portion 252. The discharge device 25 can rotate around the vertical cylinder portion 251 as an axis. In addition, the grain tank 24 can rotate left and right around the vertical cylinder portion 251 as shown by the two-dot chain line in Fig. 2. By rotating the grain tank 24 to the right, the workability of maintenance is improved.

[0030] The power unit 8 (see Figs. 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 includes 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.

[0031] The control unit 9 (see Figs. 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 and the like, and an operation unit that accepts operations for the combine 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 1, an accelerator that adjusts the rotation speed of the engine 27 (the running speed of the combine 1), a lift switch that raises and lowers the harvesting unit 3, and the like.

[0032] 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 provided with the shielding member 51. As shown in FIG.

[0033] The combine harvester 1 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 upper part and the 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. Below, the engine 27, the exhaust gas purification device 32, and the shielding member 51 will be mainly described.

[0034] [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.

[0035] [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.

[0036] The exhaust gas purification device 32 (see Figs. 7 and 11) includes a cylindrical housing 33 that houses a DPF (Diesel Particulate Filter, not shown). The housing 33 is disposed with its longitudinal direction extending in the front-to-rear direction. A flange portion 34 that protrudes radially from the outer circumferential surface of the housing 33 over the entire circumference is provided at the rear of the housing 33. The 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.

[0037] Exhaust gas generated by the engine 27 is guided to an exhaust gas purification device 32 through an 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 through a tail pipe 41.

[0038] A 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 threshing machine 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 a housing front first support member 35 and a housing front second support member 38 (see Figs. 6 and 8). In other words, the housing 33 is supported by the threshing machine frame 81 and the engine room frame 37.

[0039] The housing rear support member 36 is a plate-like member having a vertical portion perpendicular to the front-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 joined to the threshing machine frame 81 by welding. The horizontal portion of the housing rear support member 36 is joined to the horizontal portion of the first connecting member 71 by using a bolt.

[0040] 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-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).

[0041] 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 beyond 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, thereby cooling the exhaust gas and the tail pipe 41.

[0042] 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 threshing section 4.

[0043] The tail pipe front support member 43 is a plate-like 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 tail pipe front support member 43 is connected to the vertical portion of the first connecting member 71 by using a bolt.

[0044] 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 vertical portions 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 by 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 by using a bolt.

[0045] A notch 77 is provided at the right end of the horizontal portion 73 of the second connecting member 72, which is cut out in an arc shape along the outer circumferential surface of a casing 92 of the grain conveying device 91. When the storage section 6 is in the position shown by the solid line in FIG. 2, the casing 92 is housed in the notch 77.

[0046] A long hole 75 with its longitudinal direction extending in the front-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 with respect to the lip portion 84 can be adjusted in the front-rear direction.

[0047] A long hole 76 with its longitudinal direction extending in the front-rear direction is provided in the center of the horizontal part 73 of the second connecting member 72. The horizontal part of the tailpipe rear support member 44 is connected to the horizontal part 73 of the second connecting member 72 via the long hole 76 using a bolt. Therefore, the position of the second connecting member 72 with respect to the tailpipe rear support member 44 can be adjusted in the front-rear direction.

[0048] In this way, since 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, it is possible to prevent unnecessary load from being applied to the casing 92 and the tail pipe 41. Furthermore, even if the relative positional relationship between the threshing section 4 and the storage section 6 shifts due to aging or the like, the casing 92 and the tail pipe 41 can be protected by adjusting the fore-aft position of the second connecting member 72.

[0049] [Shielding material] The shielding member 51 (see Figs. 6 to 11, 13, 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.

[0050] The threshing section side shielding member 52 covers the side and the upper side of the exhaust gas purification device 32 on the threshing section 4 side. 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 can be easily removed because it accumulates in the valley-shaped space formed by the rotor cover 82 and the threshing section side shielding member 52. 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.

[0051] The storage section side shielding member 53 covers the sides and the top of the exhaust gas purification device 32 on the storage section 6 side. The storage section 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 section side shielding member 53 is provided in a range extending from the front end to the rear end of the housing 33. In other words, the shielding member 51 has a portion facing the grain conveying device 91 cut out. Therefore, the shielding member 51 does not interfere with the grain conveying device 91.

[0052] 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 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.

[0053] 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 joined to the housing front first support member 35. That is, 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.

[0054] Since the temperature is highest near the connection between the tail pipe 41 and the housing 33, an inner shielding member 57 is provided inside the outer shielding member (threshing section side shielding member 52, storage section side shielding member 53) near the connection (see Figs. 7, 10, 15, 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.

[0055] The inner shielding member 57 (see FIG. 16) is provided in a range in the circumferential direction that corresponds at least to the outer shielding member. 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.

[0056] 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 at three locations, above, to the left, and to the right, as 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 joined to the stays 46 of the tail pipe 41 using bolts. The inner shielding member 57 is disposed 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.

[0057] [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 overall.

[0058] 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.

[0059] The combine harvester 1 according to the present embodiment described above includes the threshing section 4 provided on one side in the left-right direction, the storage section 6 provided on the other side in the left-right direction, the engine 27 provided in front of the storage section 6, the 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 the left and right sides of the exhaust gas purification device 32. With this configuration, it is possible to suppress the intrusion of dust into 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.

[0060] Furthermore, in the combine harvester 1 according to this embodiment, the portion of the shielding member 51 covering the side facing the threshing unit 4 is joined to the outer surface of the threshing unit 4. This configuration makes it possible to prevent dust from entering through the gap between the shielding member 51 and the threshing unit 4. Furthermore, since dust accumulates between the shielding member 51 and the threshing unit 4, the dust can be easily removed.

[0061] Furthermore, the combine harvester 1 according to this embodiment includes 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.

[0062] Furthermore, 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.

[0063] 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 can make it difficult for heat to be transmitted from the tail pipe 41 to the outer shielding member. Also, the intrusion of dust from behind the exhaust gas purification device 32 can be further suppressed.

[0064] 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. This configuration makes it possible to properly maintain the distance between the tail pipe 41 and the exhaust gas purification device 32 and the inner shielding member 57.

[0065] Furthermore, 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 that the width of the combine harvester 1 in the left-right direction can be reduced.

[0066] Moreover, the combine harvester 1 according to this embodiment includes a sensor 61 for detecting pressure or temperature, and a sensor holding member 63 that is supported by the threshing section 4 and holds the sensor 61 at 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, heat from the exhaust gas purification device 32 is less likely to be transmitted to the sensor 61, so that deterioration in 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 a rise in temperature of the sensor 61, but in this embodiment, there is no need to provide an opening in the shielding member 51, so that it is possible to suppress the intrusion of dust into the inside of the shielding member 51.

[0067] The above embodiment may be modified as follows.

[0068] In the above embodiment, an example was 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 intrusion of dust into the exhaust gas purification device 32 from the rear.

[0069] In the above embodiment, an example in which the inner shielding member 57 is provided has been shown, but the inner shielding member 57 may not be provided. In that case, the portion of the outer shielding member that covers the tail pipe 41 may be supported by the tail pipe 41. With this configuration as well, the distance between the tail pipe 41 and the exhaust gas purification device 32 and the shielding member 51 can be appropriately maintained.

[0070] 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 suppress the intrusion of dust into the exhaust gas purification device 32 compared to the case in which the shielding member 51 has openings in the front and on the side of the threshing section 4 side. [Explanation of symbols]

[0071] 1. Combine Harvester 4. Threshing Department 6. Storage section 27 Engine 32 Exhaust gas purification equipment 41 Tailpipe 51 Shielding material 52 Threshing section side shielding member (outer shielding member) 53 Storage section side shielding member (outer shielding member) 57 Inner shielding member 61 Sensors 63 Sensor holding member 91 Grain conveying device

Claims

1. 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 unit; 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.

2. 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.

3. 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.

4. 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.

5. 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.

6. 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.

7. 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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