Combine

Abstract

To inhibit entry of dust into an exhaust gas purification device.SOLUTION: A combine 1 includes: a threshing part 4 provided at one side in a lateral direction; a storage part 6 provided at the other side in the lateral 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 which covers the upper side and the left and right sides of the exhaust gas purification device 32. The shielding member 51 and the threshing part 4 are overlapped in a plan view.SELECTED DRAWING: Figure 3

Description

Technical Field

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

Background Art

[0002] As one form of a combine harvester, there is known one having a cutting unit provided at the front part of a machine body frame, and a threshing unit and a storage unit provided behind the cutting unit. The threshing unit and the storage unit are provided adjacent to each other on the left and right, and an operation unit is provided between the cutting unit and the storage unit. An engine is provided below the operation unit, and the exhaust gas generated from the engine is discharged rearward through an exhaust pipe passing between the threshing unit and the storage unit.

[0003] An exhaust gas purification device equipped with a filter or the like for removing particulate matter contained in the exhaust gas is provided in the exhaust pipe. However, since 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, when dust scattered from the cereal straws conveyed from the cutting unit to the threshing unit accumulates on the exhaust gas purification device or in its vicinity, great care is required for the work of removing the dust, which increases the burden on the operator.

[0004] Therefore, conventionally, techniques for suppressing the adhesion of dust to the exhaust gas purification device have been studied. For example, in Patent Document 1, it has been proposed to cover the exhaust gas purification device with a cover member (shielding member). For the sake of both safety and air permeability, 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 unit side of the exhaust gas purification device.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Summary of the Invention

Problems 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 opening and the second opening and adhere to the exhaust gas purification device. To remove the adhered dust, work from below the shielding member or work to remove the shielding member is required, which is more laborious than before.

[0007] An object of the present invention is to provide a combine that can suppress the entry of dust into an exhaust gas purification device in view of the above circumstances.

Means for Solving the Problems

[0008] To solve the above problems, a combine according to the present invention includes a threshing unit provided on one side in the left-right direction, a storage unit 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, and a shielding member that covers the upper and left and right sides of the exhaust gas purification device, and the shielding member and the threshing unit overlap in plan view.

[0009] A portion of the shielding member that covers the side on the threshing unit side may be joined to the outer surface of the threshing unit.

[0010] The combine includes a tail pipe connected to the rear end of the exhaust gas purification device, and the shielding member may cover at least the upper part of the tail pipe.

[0011] The tail pipe is supported by the threshing unit, and a portion of the shielding member that covers the tail pipe may be supported by the tail pipe.

[0012] The shielding member may include an outer shielding member that covers at least the upper part of the exhaust gas purification device and the tail pipe, and an inner shielding member provided inside the outer shielding member and covering at least the upper part of the tail pipe.

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

[0014] The combine is provided between the storage unit and the tail pipe, and includes a grain conveying device that conveys grains from the threshing unit to the storage unit. A portion of the shielding member facing the grain conveying device may be notched.

[0015] The combine may include a sensor that detects pressure or temperature, and a sensor holding member that is supported by the threshing unit and holds the sensor at a position where it does not contact the exhaust gas purification device.

Advantages of the Invention

[0016] According to the present invention, the entry of dust into the exhaust gas purification device can be suppressed.

Brief Description of the Drawings

[0017]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Figure 13

Figure 14

Figure 15

Figure 16

Embodiments for Carrying Out the Invention

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

[0019] [Overview of the Combine] First, the overview of the combine 1 will be described. FIG. 1 is a left side view showing the appearance of the combine 1. FIG. 2 is a plan view showing the appearance of the combine 1. FIG. 3 is a plan view showing the exhaust gas purification device 32, the engine 27, the threshing unit 4, and the storage unit 6. FIG. 4 is a perspective view showing the exhaust gas purification device 32, the engine 27, and the threshing unit 4. FIG. 5 is a perspective view showing the storage unit 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) includes a traveling unit 2, a cutting unit 3, a threshing unit 4, a sorting unit 5, a storage unit 6, a power unit 8, and a control unit 9. While traveling by the traveling unit 2, the combine harvester 1 threshes the cereal straw cut by the cutting unit 3 with the threshing unit 4, sorts the grains with the sorting unit 5, and stores them in the storage unit 6. The combine harvester 1 drives the traveling unit 2, the cutting unit 3, the threshing unit 4, the sorting unit 5, and the storage unit 6 with the power supplied from the power unit 8. In this embodiment, an example of a conventional combine harvester is used for explanation, but the present invention may be applied to a self-threshing combine harvester.

[0021] The traveling unit 2 is provided below the body frame 10. The cutting unit 3 is provided in front of the body frame 10. The threshing unit 4, the sorting unit 5, the storage unit 6, the power unit 8, and the control unit 9 are provided above the body frame 10.

[0022] The traveling unit 2 includes a pair of left and right crawler-type traveling devices 11 provided below the body frame 10. The crawler-type traveling devices 11 are rotated by the power generated by the power unit 8. By independently controlling the rotational drive of the left and right crawler-type traveling devices 11, the combine harvester moves forward, backward, and turns.

[0023] The cutting unit 3 (see FIG. 1) is provided in front of the traveling unit 2. The cutting unit 3 includes a reel 13, a cutter 14, an auger 15, and a conveyor 16. The reel 13 guides the cereal straw in the field to the cutter 14 by rotating. The cutter 14 cuts the cereal straw guided by the reel 13. The auger 15 gathers the cereal straw cut by the cutter 14 onto the conveyor 16. The conveyor 16 conveys the cereal straw gathered by the auger 15 to the threshing unit 4.

[0024] The threshing unit 4 (see FIGS. 2 and 3) is disposed behind the cutting unit 3 and on one side in the left-right direction (the left side in this embodiment). The threshing unit 4 (see FIG. 4) includes a threshing machine frame 81 and a rotor cover 82. The threshing machine frame 81 has a box shape with an open upper portion. The threshing machine frame 81 houses the handling cylinder 19 and the receiving net 20 (see FIG. 1). The rotor cover 82 has a trapezoidal cross section when viewed from the front-rear direction. The rotor cover 82 closes the upper portion of the threshing machine frame 81. The handling cylinder 19 rotates to convey the cereal straw rearward while threshing it. The receiving net 20 supports the cereal straw conveyed by the handling cylinder 19 and drops the threshed material onto the sorting unit 5.

[0025] At the lower right portion of the rotor cover 82 (see FIG. 4), a stepped portion 83 and a lip portion 84 are provided. The stepped portion 83 includes a horizontal portion protruding rightward from the lower end portion of the right inclined surface of the rotor cover 82 and a vertical portion protruding downward from the right end portion of the horizontal portion. In this example, two stepped portions 83 are provided, but one or three or more stepped portions 83 may be provided. The lip portion 84 protrudes rightward from the lower end portion of the stepped portion 83.

[0026] The sorting unit 5 (see FIG. 1) is provided below the threshing unit 4. The sorting unit 5 includes a rocking sorting device 21 and a wind sorting device 22. The rocking sorting device 21 includes a rocking sieve and sorts the threshed material dropped from the threshing unit 4 into grains and chaff. The wind sorting device 22 blows off impurities such as chaff contained in the threshed material sorted by the rocking sorting device 21. The impurities are discharged to the outside through a discharge port (not shown) provided behind the sorting unit 5.

[0027] The storage unit 6 (see FIGS. 1 to 3 and 5) is provided to the right of the threshing unit 4. The storage unit 6 includes a grain conveying device 91, a grain tank 24, and a discharging device 25. The grain conveying device 91 conveys the grains sorted by the rocking sorting device 21 and the wind sorting device 22 to the grain tank 24. The grain tank 24 stores the grains conveyed by the grain conveying device 91. The discharging device 25 discharges the grains stored in the grain tank 24 to an arbitrary location.

[0028] The grain conveying device 91 (see FIG. 5) includes a conveyor (not shown) such as a screw type or a bucket type, and a casing 92 that houses the conveyor. The casing 92 has a cylindrical shape with the vertical direction as the longitudinal direction, and its lower end is connected to the sorting unit 5, and its upper end is connected to the grain tank 24. In the present embodiment, in order to show an example where the conveyor is of the screw type, the casing 92 is cylindrical. When the conveyor is of the bucket type, the casing 92 has a rectangular parallelepiped shape.

[0029] The discharging device 25 (see FIGS. 1 and 2) includes a vertical cylindrical portion 251 with the vertical direction as the longitudinal direction and a horizontal cylindrical portion 252 with the horizontal direction as the longitudinal direction. The lower end of the vertical cylindrical portion 251 is connected to the grain tank 24. One end of the horizontal cylindrical portion 252 is connected to the upper end of the vertical cylindrical portion 251. An auger (not shown) is provided inside the vertical cylindrical portion 251 and the horizontal cylindrical portion 252. The discharging device 25 is rotatable about the vertical cylindrical portion 251. Further, as shown by the two-dot chain line in FIG. 2, the grain tank 24 is rotatable in the left-right direction about the vertical cylindrical portion 251. 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 side 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 cutting 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 having a touch panel, and a plurality of operation units (not shown). The terminal serves as both a display unit that displays images and the like and an operation unit that receives operations on the combine 1. The plurality of operation units are operated by an operator seated in the driver's seat, and include a steering wheel for operating the steering of the combine 1, an accelerator for adjusting the rotational speed of the engine 27 (the traveling speed of the combine 1), a lift switch for raising and lowering the cutting 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 obtained by removing the shielding member 51 from FIG. 6. 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 unit 4. FIG. 10 is a perspective view obtained by removing the outer shielding members (the threshing unit side shielding member 52 and the storage unit side shielding member 53) and the front shielding member 56 from FIG. 9. FIG. 11 is a perspective view obtained by removing the inner shielding member 57 from FIG. 10. 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 unit 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.

[0033] The combine 1 includes a threshing unit 4 provided on one side in the left-right direction, a storage unit 6 provided on the other side in the left-right direction, an engine 27 provided in front of the storage unit 6, an exhaust gas purification device 32 provided between the threshing unit 4 and the storage unit 6, and a shielding member 51 that covers the upper and left and right sides of the exhaust gas purification device 32. Specifically, it is as follows. Note that the threshing unit 4 and the storage unit 6 are as described above. Hereinafter, mainly, the engine 27, the exhaust gas purification device 32, and the shielding member 51 will be 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 the exhaust gas generated from the engine 27 to the exhaust gas purification device 32. An engine room frame 37 is provided between the engine 27 and the storage unit 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 members such as columns, beams, and plates. The engine room frame 37 has a function of separating the engine 27 and the storage unit 6, and also has a function of supporting 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 unit 4 and the storage unit 6 in the left - right direction. Also, the exhaust gas purification device 32 is provided between the engine 27 and the grain conveying device 91 in the front - rear direction. Further, 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 arranged with its longitudinal direction in the front - rear direction. A flange portion 34 that protrudes radially over the entire circumference from the outer peripheral surface of the housing 33 is provided at the rear portion 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 portion of the housing 33.

[0037] The exhaust gas generated from the engine 27 is guided to the exhaust gas purification device 32 by the exhaust pipe 31. The DPF purifies the exhaust gas by collecting the particulate matter contained in the exhaust gas. The purified exhaust gas is discharged into the atmosphere by the tail pipe 41.

[0038] A housing rear support member 36 (Figs. 9, 10, 11, 13) is coupled to the flange portion 34 using bolts. The housing rear support member 36 is coupled to the threshing machine frame 81 by a first connecting member 71. Also, the front end portion of the housing 33 is coupled 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, 8). That is, 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 portion 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 portion of the horizontal portion. The left end portion of the first connecting member 71 is coupled to the threshing machine frame 81 by welding. The horizontal portion of the housing rear support member 36 is coupled to the horizontal portion of the first connecting member 71 using bolts.

[0040] The housing front first support member 35 and the housing front second support member 38 are plate-like members having a vertical portion perpendicular to the front-rear direction and a horizontal portion bent forward from the lower end portion of the vertical portion. The vertical portion of the housing front first support member 35 is coupled to the front end face 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 coupled using bolts (not shown). The horizontal portion of the housing front second support member 38 is coupled 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 portion of the inner pipe 45 protrudes forward from the front end portion of the outer pipe 42. The inner pipe 45 is connected to an exhaust port 33E (see Fig. 16) provided at the rear end portion 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 exhausting the exhaust gas, outside air is introduced from 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 includes a straight pipe portion extending along the front-rear direction and a curved portion curved upward and leftward from the rear end portion of the straight pipe portion. A tail pipe front support member 43 that supports the front portion of the straight pipe portion and a tail pipe rear support member 44 that supports the rear portion of the straight pipe portion are welded to the lower portion of the straight pipe portion. The tail pipe front support member 43 is connected to the threshing machine frame 81 by a first connecting member 71. The tail pipe rear support member 44 is connected to the threshing machine frame 81 by a second connecting member 72. That is, the tail pipe 41 is supported by the threshing unit 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 end portions 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 using bolts.

[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 end portions of the vertical portion, and a horizontal portion bent rearward from the lower end portion 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 end portions of the horizontal portion 73. The left end portion of the horizontal portion 73 of the second connecting member 72 is bolted to the lip portion 84 of the rotor cover 82. The horizontal portion of the tail pipe rear support member 44 is bolted to the horizontal portion 73 of the second connecting member 72.

[0045] At the right end of the horizontal portion 73 of the second connecting member 72, there is a notch 77 that is cut out in an arc shape along the outer peripheral surface of the casing 92 of the grain conveying device 91. When the storage portion 6 is in the position of the solid line in FIG. 2, the casing 92 is accommodated in the notch 77.

[0046] On the left end side of the horizontal portion 73 of the second connecting member 72, there is a long hole 75 with the longitudinal direction in the front - rear direction. The second connecting member 72 is connected to the lip portion 84 via the long hole 75 using bolts. Therefore, the second connecting member 72 can be adjusted in position in the front - rear direction with respect to the lip portion 84.

[0047] In the central portion of the horizontal portion 73 of the second connecting member 72, there is a long hole 76 with the longitudinal direction in the front - rear direction. 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 bolts. Therefore, the second connecting member 72 can be adjusted in position in the front - rear direction with respect to the tail pipe rear support member 44.

[0048] In this way, since the second connecting member 72 can be adjusted in position in the front - rear direction with respect to the lip portion 84 and the tail pipe rear support member 44, it is possible to prevent an excessive load from acting on the casing 92 and the tail pipe 41. Also, even when the positional relationship between the threshing portion 4 and the storage portion 6 is relatively displaced due to aging or the like, the casing 92 and the tail pipe 41 can be protected by adjusting the position of the second connecting member 72 in the front - rear direction.

[0049] [Shielding member] The shielding member 51 (see FIGS. 6 to 11, 13, 16) includes a threshing - portion - side shielding member 52, a storage - portion - side shielding member 53, a front shielding member 56, and an inner shielding member 57. The threshing - portion - side shielding member 52 and the storage - portion - side shielding member 53 are examples of outer shielding members. The shielding member 51 is formed using a member such as a plate - shaped metal or resin.

[0050] The threshing unit side shielding member 52 covers the side and the upper part on the threshing unit 4 side of the exhaust gas purification device 32. The threshing unit side shielding member 52 is not provided with an opening. The threshing unit side shielding member 52 has a side part perpendicular to the left - right direction and an inclined part inclined upward and to the upper - right from the upper - end part of the side part. The upper - end part of the inclined part reaches directly above the housing 33. The threshing unit side shielding member 52 is provided in a range from the front - end part of the housing 33 to the straight - pipe part of the tail pipe 41. The lower - end part of the side part of the threshing unit side shielding member 52 is joined to the stepped part 83 of the rotor cover 82 (see Fig. 16). That is, the threshing unit side shielding member 52 is supported by the threshing unit 4. There is no gap through which dust can enter between the lower - end part of the side part of the threshing unit side shielding member 52 and the stepped part 83 of the rotor cover 82. Since dust accumulates in the trough - shaped space formed by the rotor cover 82 and the threshing unit side shielding member 52, it can be easily removed. Note that the lower - end part of the side part of the threshing unit side shielding member 52 may be joined to the lip part 84 of the rotor cover 82.

[0051] The storage unit side shielding member 53 covers the side and the upper part on the storage unit 6 side of the exhaust gas purification device 32. The storage unit side shielding member 53 has a side part perpendicular to the left - right direction and an inclined part inclined upward and to the upper - left from the upper - end part of the side part. The upper - end part of the inclined part reaches directly above the housing 33. The storage unit side shielding member 53 is provided in a range from the front - end part of the housing 33 to the rear - end part. In other words, the shielding member 51 has a part 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 strip-shaped members having a shape along 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 coupled to the first housing front support member 35. The lower end of the rear frame 55 is coupled 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 coupled to the inclined portion of the threshing section side shielding member 52. Accordingly, 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 portion of the front shielding member 56 is coupled to the first housing front support member 35. That is, the front shielding member 56 is supported by the engine room frame 37. A heat shield 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 shield plate 561. The storage section side front shielding member 563 has a shape along 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 members (threshing unit side shielding member 52, storage unit side shielding member 53) near the connection to reduce the heat transfer to the outer shielding members (see FIGS. 7, 10, 15, and 16). The inner shielding member 57 is a plate-shaped member that curves 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. The front end portion of the inner shielding member 57 is preferably located in front of the rear end portion of the housing 33. The rear end portion of the inner shielding member 57 is preferably located behind the front end portion of the outer pipe 42 of the tail pipe 41.

[0055] The inner shielding member 57 (see FIG. 16) is provided at least in a range corresponding to the outer shielding member in the circumferential direction. In other words, the inner shielding member 57 is provided in a wider range than the outer shielding member in the circumferential direction. Specifically, on the threshing unit 4 side, the lower end portion of the inner shielding member 57 is located below the lower end portion of the threshing unit side shielding member 52. On the storage unit 6 side, the lower end portion of the inner shielding member 57 is located below the lower end portion of the storage unit side shielding member 53.

[0056] The inner shielding member 57 is provided with stays 58 that project 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 when viewed from the center of the tail pipe 41. The tail pipe 41 (see FIG. 14) is provided with stays 46 that project 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 bolted to the stays 46 of the tail pipe 41. The inner shielding member 57 is arranged so as not to contact the surface of the housing 33. A predetermined range of gap is ensured 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 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 portion of the sensor holding member 63 is coupled to the stepped portion 83 of the rotor cover 82. The sensor holding member 63 does not contact the threshing section side shielding member 52 and the housing 33. The upper end portion of the sensor holding member 63 is coupled to the upper portion of the rear frame 55 via a plate-shaped stay connection portion 64. That is, the sensor holding member 63 and the rear frame 55 have an arch-shaped structure as a whole.

[0058] A plate-shaped sensor plate 62 is provided on the upper portion of the sensor holding member 63. A sensor 61 is attached to the sensor plate 62. The housing 33 is provided with a detection element (not shown) for detecting the pressure, temperature, etc. of the DPF. The sensor 61 and the detection element are connected by a signal line (not shown). The detection element outputs a signal representing 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 do not contact the housing 33, the threshing section side shielding member 52, and the storage section side shielding member 53.

[0059] According to the combine 1 according to the present embodiment described above, 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 are provided. According to this configuration, the entry of dust into the exhaust gas purification device 32 can be suppressed as compared with the case where the shielding member 51 has an opening on the side of the threshing section 4.

[0060] Further, according to the combine 1 according to the present embodiment, the portion covering the side of the threshing unit 4 side of the shielding member 51 is joined to the outer surface of the threshing unit 4. According to this configuration, it is possible to suppress the entry of dust from the gap between the shielding member 51 and the threshing unit 4. Further, since dust accumulates between the shielding member 51 and the threshing unit 4, the dust can be easily removed.

[0061] Further, according to the combine 1 according to the present embodiment, a tail pipe 41 connected to the rear end portion of the exhaust gas purification device 32 is provided, and the shielding member 51 covers at least the upper portion of the tail pipe 41. According to this configuration, it is possible to suppress the adhesion of dust to the tail pipe 41 and the entry of dust into the exhaust gas purification device 32 from the rear.

[0062] Further, according to the combine 1 according to the present embodiment, the tail pipe 41 is supported by the threshing unit 4, and the portion (inner shielding member 57) of the shielding member 51 that covers the tail pipe 41 is supported by the tail pipe 41. According to 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] Further, according to the combine 1 according to the present embodiment, the shielding member 51 includes an outer shielding member (threshing unit side shielding member 52, storage unit side shielding member 53) that covers at least the upper portion of the exhaust gas purification device 32 and the tail pipe 41, and an inner shielding member 57 provided inside the outer shielding member and covering at least the upper portion of the tail pipe 41. According to this configuration, it is possible to make it difficult for heat to be transmitted from the tail pipe 41 to the outer shielding member. Further, it is possible to further suppress the entry of dust from the rear of the exhaust gas purification device 32.

[0064] Further, according to the combine 1 according to the present embodiment, the tail pipe 41 is supported by the threshing unit 4, and the inner shielding member 57 is supported by the tail pipe 41. According to 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.

[0065] Further, according to the combine 1 according to the present embodiment, a grain conveying device 91 is provided between the storage unit 6 and the tail pipe 41, and conveys grains from the threshing unit 4 to the storage unit 6. A portion of the shielding member 51 facing the grain conveying device 91 is cut out. According to this configuration, interference between the shielding member 51 and the grain conveying device 91 can be avoided, so that the width of the combine 1 in the left-right direction can be suppressed.

[0066] Further, according to the combine 1 according to the present embodiment, a sensor 61 for detecting pressure or temperature, and a sensor holding member 63 supported by the threshing unit 4 and holding the sensor 61 at a position not in contact with the exhaust gas purification device 32 are provided. According to this configuration, compared with the case where 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 that a decrease in the accuracy of the sensor 61 due to heat is suppressed. Conventionally, an opening was provided in the shielding member 51 to introduce outside air to suppress the temperature rise of the sensor 61. However, in the present embodiment, since it is not necessary to provide an opening in the shielding member 51, the entry of dust into the inside of the shielding member 51 can be suppressed.

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

[0068] In the above embodiment, an example is shown in which the threshing unit side shielding member 52 is provided in a range from the front end portion of the housing 33 to the straight pipe portion of the tail pipe 41. However, the threshing unit side shielding member 52 may be provided in a range from the front end portion of the housing 33 to the entire tail pipe 41. According to this configuration, the adhesion of dust to the tail pipe 41 and the entry of dust into the exhaust gas purification device 32 from the rear can be further suppressed.

[0069] In the above embodiment, an example in which the inner shielding member 57 is provided is shown. However, the inner shielding member 57 may not be provided. In that case, the portion of the outer shielding member covering the tail pipe 41 may be supported by the tail pipe 41. Even 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.

[0070] In the above embodiment, an example in which the threshing unit side shielding member 52 and the front shielding member 56 do not have an opening has been shown. However, either one of the threshing unit side shielding member 52 and the front shielding member 56 may have an opening. Even with this configuration, compared with the case where the shielding member 51 has openings in the front and the side on the threshing unit 4 side, entry of dust into the exhaust gas purification device 32 can be suppressed.

Explanation of Signs

[0071] 1 Combine 4 Threshing unit 6 Storage unit 27 Engine 32 Exhaust gas purification device 41 Tail pipe 51 Shielding member 52 Threshing unit side shielding member (outer shielding member) 53 Storage unit side shielding member (outer shielding member) 57 Inner shielding member 61 Sensor 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 shielding member and the threshing section overlap in a planar view.

2. A combine harvester as described in claim 1, 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.

3. A tail pipe is connected to a rear end of the exhaust gas purification device, The combine harvester according to claim 1 or 2, wherein the shielding member covers at least an upper portion of the tail pipe.

4. The tail pipe is supported by the threshing section, The combine harvester according to claim 3, wherein a portion of the shielding member covering the tail pipe is supported by the tail pipe.

5. 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 3 or 4, further comprising: an inner shielding member provided inside the outer shielding member and covering at least an upper portion of the tail pipe.

6. The tail pipe is supported by the threshing section, The combine harvester according to claim 5, wherein the inner shielding member is supported by the tail pipe.

7. 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 3 to 6, characterized in that a portion of the shielding member facing the grain conveying device is cut out.

8. A sensor for detecting pressure or temperature; A combine harvester as described in any one of claims 1 to 7, 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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