JP6523865B2 - Combine - Google Patents

Description

  The present invention relates to a combine.

  In the conventional combine, there has been one in which the engine bonnet is configured to be switchable between a retracted position where the engine bonnet is located on the inboard side and an extended position where the engine bonnet protrudes outward in the lateral side of the body. That is, a support for rotatably supporting the engine bonnet is erected from the machine body frame, and the support is formed long in the vertical direction, and a small diameter shaft portion is formed at the upper end. A cylindrical rotation fulcrum member is provided on the engine bonnet side, and a lower end portion of the rotation fulcrum member is rotatably fitted and supported on a shaft portion formed on an upper portion of a support, and an upper end portion of the rotation fulcrum member is threshed It was rotatably supported by a support member connected to the device (see, for example, Patent Document 1).

JP, 2010-75118, A

  In the above-described conventional configuration, the rotation support member on the engine bonnet side is rotatably supported at the upper end and the lower end respectively by the support column and the support member connected to the threshing device. Can be stably supported. And there is an advantage that it becomes possible to use a long support column in the vertical direction as a support frame for supporting other devices provided in the drive unit. However, the conventional configuration described above has the following disadvantages, and there is still room for improvement.

  The portion where the rotation fulcrum member is fitted and supported to the fixed side member (the support and the support member) has a predetermined dimensional tolerance, and a slight rattling may occur. It is not possible to null the dimensional tolerance at such a point of being fitted and supported. And in the above-mentioned conventional composition, since the fulcrum length along the up-and-down direction of a rotation fulcrum member, ie, the up-and-down interval between the upper end and the lower end is short, it was caused by the dimensional tolerance in the above-mentioned fitting support location When the rattle is switched to the overhanging posture, the entire engine bonnet may tilt downward. In particular, in the case where the entire driving unit including the cabin is configured to be able to switch its posture integrally with the engine bonnet, there is a risk that the amount of inclination may become large.

  When the entire engine bonnet inclines downward when switching to the overhanging posture, when switching the engine bonnet from the overhanging posture to the retracted posture, it is necessary to rotate the entire engine bonnet upward while pivoting to the retracted posture, There is a disadvantage that the labor burden when performing the posture switching operation is increased.

  Therefore, there has been a demand for a combine which can reduce the burden of labor when performing the posture switching operation, in which the posture of the engine bonnet can be switched.

The characteristic configuration of the combine according to the present invention is
An engine, an engine bonnet that covers the upper side of the engine , a support member that is erected from the machine body frame and has a cylindrical shape, and is integrally connected to the engine bonnet and extends along the vertical direction And a fulcrum member,
The engine bonnet is rotatably supported about the vertical axis in a state in which the pivoting fulcrum member is inserted from above into the support member, whereby the retracting posture in which the engine bonnet is positioned on the inward side of the machine and the lateral side of the machine been made attitude can be switched to configuration over the overhang attitude projecting towards,
Inside the cylinder of the support member, there is provided a bearing portion rotatably receiving and supporting the rotation fulcrum member while restricting the position in the axial direction,
A reduced diameter portion having an inner diameter smaller than the inner diameter at the upper side than the position is formed at an upper and lower position in the inside of the support member,
The lower end portion of the rotation fulcrum member is received and supported by the step portion above the reduced diameter portion, and the reduced diameter portion is configured to function as the bearing portion .

  According to the present invention, a cylindrical support member is provided upright on the airframe side from the airframe. The bonnet is provided with a pivot fulcrum member integrally connected to the engine bonnet and extending in the vertical direction. Then, in a state where the rotation fulcrum member is inserted from above into the support member, it is rotatably supported around the vertical axis.

  Since the pivoting fulcrum member is inserted and inserted from above into the cylindrical support member, the pivoting fulcrum member is moved up and down compared to the conventional one by deepening the insertion and insertion depth into the support member. It is possible to form in a long time. And in the structure by which each of the upper end part and lower end part of a rotation fulcrum member is rotatably supported, the space | interval of the upper end part and lower end part of a rotation fulcrum member becomes larger than before.

  As a result, since the vertical distance between the upper end portion and the lower end portion of the pivoting fulcrum member rotatably supported by the stationary side member becomes larger than that of the conventional one, the pivoting fulcrum member is relative to the stationary side member Even if a predetermined dimensional tolerance exists in the supported portion and rattling occurs, the vertical distance between the upper end portion and the lower end portion rotatably supported by the fixed side member in the rotation supporting member is long As a result, when switching to the overhanging posture, the amount of inclination of the entire engine bonnet downwards is small.

Therefore, when switching to retire posture from the posture overhanging the error down Jin bonnet, it is not necessary to lift large entire engine hood upwardly, it is possible to reduce the labor burden when performing posture switching operations.

Further, according to the present invention, the rotation fulcrum member which is inserted from above into the support member is rotatably received and supported by the bearing portion provided inside the cylinder of the support member. The bearing portion is provided inside the cylinder of the support member, and can be provided at any position in the axial direction of the support member.

  Since the insertion depth of the rotation fulcrum member into the support member is determined by the position of the bearing portion, the insertion depth of the rotation fulcrum member into the support member can be determined by setting the position along the axial direction of the support member of the bearing portion. It can be set to an appropriate value.

Furthermore, according to the present invention , the lower end portion of the rotation fulcrum member inserted and inserted into the support member is received by the upper level difference portion of the reduced diameter portion formed at the middle position in the vertical direction inside the support member. Be supported. And it is slidably guided by the sliding part provided in the diameter reduction part or its neighborhood, and is supported rotatably around the vertical axis.

  Therefore, the pivoting fulcrum member can be rotatably received and supported with a simple configuration in which the diameter reducing portion is formed in the supporting member.

  In the present invention, the pivot shaft portion is provided in a state of projecting downward from the lower end portion of the pivot point member, and the sliding shaft portion slides between the outer circumferential portion of the pivot shaft portion and the inner circumferential portion of the reduced diameter portion. Preferably, a moving part is provided.

  According to this configuration, the pivot shaft projecting downward from the lower end of the pivot point member fits into the inner periphery of the reduced diameter portion, and the outer periphery of the pivot shaft and the inner periphery of the reduced diameter portion The pivoting fulcrum member is rotatably supported about the vertical axis by sliding relative to the part.

  Therefore, by using the configuration in which the rotation fulcrum member is slide-guided by effectively using the inner peripheral portion of the reduced diameter portion, the sliding portion can be made compact and the structure can be simplified with less labor for processing. .

  In the present invention, the support member is a cylindrical inner cylindrical member positioned radially inward and downward, and a cylindrical outer member positioned radially outward and upward of the inner cylindrical member. A cylindrical member is provided, and they are coupled in a state of being partially fitted, and the reduced diameter portion is formed at the upper end portion of the inner cylindrical member, and the inner cylindrical member and the outer cylindrical member Is preferably configured to be able to be disconnected.

  According to this configuration, when the inner cylinder member is positioned on the lower side and the outer cylinder member is positioned on the upper side, the inner cylinder member and the outer cylinder member having a cylindrical shape are partially fitted with each other. To form a support member.

  The upper end portion of the inner cylinder member is located inside the cylinder of the outer cylinder member, and the upper end portion of the inner cylinder member forms a diameter-reduced portion, and corresponds to an intermediate position in the inside of the support member It becomes. The outer cylinder member exists above the upper end of the inner cylinder member, and the inner cylinder member exists below the upper end of the inner cylinder member, so the inner diameter of the inner cylinder member below the upper end Is smaller than the inner diameter on the upper side of the upper end of the inner cylindrical member.

  Since the inner cylinder member and the outer cylinder member can be disconnected and released, when the connection of the inner cylinder member and the outer cylinder member is released and the outer cylinder member is removed, the upper end portion of the inner cylinder member is released outward. The processing operation for rotatably supporting the rotation fulcrum member can be easily performed on the upper end portion of the inner cylindrical member.

In the present invention, it is preferable that the exhaust gas processing device for purifying the exhaust gas of the engine is supported by the outer peripheral portion of the outer cylinder member.

  According to this configuration, the exhaust gas treatment device is supported by the outer peripheral portion of the outer cylindrical member provided radially outward among the support members. Since the rotation fulcrum member is inserted and inserted in a state where the inside of the outer cylinder member is inserted, the exhaust gas processing device does not affect the mounting of the rotation fulcrum member.

  Therefore, while being able to support a rotation fulcrum member in a stable state with few inclinations, an exhaust gas processing apparatus can be supported favorably.

It is a whole side view of a combine. It is a whole top view of a combine. It is a transverse top view of a combine front. It is a vertical rear view which shows the positional relationship of a threshing apparatus and an exhaust pipe. It is a right view of a combine front. It is a left view of a driving part. It is a vertical side view which shows a rotation support structure. It is a rear view of a grain tank. It is a top view of a grain tank. It is a perspective view of a grain tank. It is a perspective view of a grain tank. It is a vertical front view of an exhaust pipe. It is a perspective view of a thermal insulation cover. It is a cross-sectional top view of a thermal insulation cover.

  Hereinafter, the case where an embodiment of the present invention is applied to a self-removing type combine will be described based on the drawings.

〔overall structure〕
As shown in FIG. 1 and FIG. 2, the combine according to the present invention is provided with a reaper 2 for reaping a crop in the front of a traveling machine body self-propelled by a pair of left and right crawler traveling devices 1, 1 . A threshing device 5 is provided with an operation unit 4 whose periphery is covered with a cabin 3 on the front right side of the traveling vehicle, and a threshing device 5 for threshing the grain scraped off by the reaper 2 at the rear of the traveling vehicle; A grain tank 6 for storing grains obtained by the treatment is provided side by side in the lateral direction. The motive power unit 8 is provided below the driver's seat 7 in the driving unit 4 of the traveling machine body, and the unloader 9 is provided for discharging the grains stored in the grain tank 6 to the outside of the machine.

  In this embodiment, when defining the longitudinal direction of the vehicle, it is defined along the traveling direction of the vehicle in the working state, and when defining the left-right direction of the vehicle, left and right are defined in the state viewed in the traveling direction of the vehicle. . That is, the direction shown by the code (F) in FIGS. 1 and 2 is the machine front side, and the direction shown by the code (B) in FIGS. 1 and 2 is the machine rear side. The direction indicated by the symbol (L) in FIG. 2 is the left side of the machine, and the direction indicated by the symbol (R) in FIG. 2 is the right side of the machine.

  The reaper 2 has a branching implement 10 for drafting the stock origin of the planted rice straw to be harvested, a plurality of inducing devices 11 for causing the planted cereals in the vertical position to be in the vertical posture, and an induced Hair clipper-type reaper 12 which cuts stock origin of planted rice straw, and vertically transported from the vertical posture to the rear while carrying out posture change so that it will gradually fall sideways from the vertical posture The apparatus 13 is provided.

  The threshing device 5 supplies the tip side to the processing chamber 14 and carries out threshing processing while holding the stock origin side of the supplied harvesting grain gutter with the threshing feed chain 5a and the holding rail 5b and conveying it toward the rear of the machine. . The throttling chamber 14 is formed by being divided by the lateral side walls 15, the top plate 16, the front wall 17, and the rear wall 18 on the left and right sides of the threshing device 5. A threshing drum 19 rotatably supported across the front wall 17 and the rear wall 18 and rotatably driven about its longitudinal axis in the interior of the chamber 14, a circle in a longitudinal direction along the outer periphery on the lower side thereof An arc-shaped receiving net 20 (see FIG. 4) or the like is provided, and the threshing end is treated with a threshing drum 19 and the receiving net 20 to perform threshing processing.

  The processed material after being subjected to the threshing treatment is sorted into grains, straw and the like by the sorting section 21 below. The grains are carried out to the right lateral side outward of the threshing device 5 by a first-piece conveying screw (not shown), and are then fed by the grain conveyor 22 and conveyed to the inside of the grain tank 6. The grain tank 6 stores grains fed from the threshing device 5. Thereafter, the grain stored in the grain tank 6 is unloaded by the unloader 9 to the outside.

  As shown in FIG. 4, the sorting unit 21 performs differential gravity sorting while swinging and transferring the threshed processed material by a swing sorting device (not shown), and blows off scraps and the like by the sorting air generated by the bales 23. The dust is discharged to the outside from a dust outlet (not shown) formed at the rear end of the threshing device 5. The red mulberry 23 is provided at the front lower side position of the threshing device 5. The Karasu 23 has a plurality of blades 25 integrally rotatable on an outer peripheral portion of a drive shaft 24 extending in the left-right direction of the machine body. As shown in FIG.4 and FIG.5, the inlet port 26 is formed in the lateral side wall 15 of the right-and-left both sides of the threshing apparatus 5 of the location provided with the bales 23. While the suction rod 23 sucks external air from the left and right air inlets 26 as the drive shaft 24 is rotationally driven and the blade 25 rotates, the suctioned air is directed toward the sorting unit 21 and is blown as sorting air. Do.

  The threshing device 5 integrally opens the top plate 16 and the threshing cylinder 19 and the like upward to remove the clogged grain adhering to the receiving net 20, and maintenance work such as inspection and repair after the work is completed. Can be done easily.

  As shown in FIGS. 2 and 4, the upper structure 27 provided with the front wall 17, the rear wall 18, the threshing cylinder 19, the top plate 16 and the like in the throttling chamber 14 integrally with the support arm 28. The lower frame body 29 is rotatably supported around a longitudinal axis X located on the right side (grain tank side) of the airframe. A hydraulic cylinder 30 is provided between the upper structure 27 and the lower frame body 29. By expanding and contracting the hydraulic cylinder 30, the upper structural body 27 is moved upward as it approaches the lower frame body 29 and the top plate 16 is closed, and the top plate 16, the threshing drum 19 and the like are opened. It is provided so as to be able to open and close in the open position for maintenance (the position shown by an imaginary line in FIG. 4).

[Open and close structure around the driver's part]
As shown in FIG. 3, the driver 4 includes a driver's seat 7, a front panel 31 located in front of the driver's seat 7, a floor 32 located between the front panel 31 and the driver's seat 7, and the driver's seat 7. On the other hand, a side panel 33 and the like positioned on the inner side (left side) in the left-right direction of the machine are provided. The upper side of the driving unit 4 is covered by the cabin 3. The driver's seat 7 is supported on the top of an engine bonnet 35 that covers the upper side of a diesel-type engine 34 provided in the motive power unit 8.

  As shown in FIG. 5, the engine bonnet 35 is connected to the front plate 35a located on the front side of the engine 34, the upper surface 35b located on the upper side of the engine 34, and the rear of the upper surface 35b. The engine room is formed by including an air supply chamber forming portion 35 c and the like formed at the rear of the engine compartment 7.

  As shown in FIGS. 2 and 3, the engine bonnet 35, the front panel 31, the side panels 33, the floor 32, the driver seat 7, the cabin 3 and the like are integrally connected to form an operating unit structure 36. . As shown in FIGS. 2 and 5 to 7, the driving unit structure 36 is supported by the body frame 37 so as to be rotatable around the vertical axis Y1 on the left rear side of the driver's seat 7.

Next, the pivot support structure of the driver structure 36 will be described in detail.
As shown in FIGS. 3 and 5 to 7, a cylindrical support member 38 is provided upright from the machine body frame 37 at the left rear side of the drive unit 4. On the other hand, a pivot point member 40 extending in the vertical direction is integrally connected to the left side of the back portion of the driving unit structure 36 via an arm 39. The rotation fulcrum member 40 is inserted into the support member 38 from above and is supported so as to be rotatable around the vertical axis Y1. Therefore, the attitude of the driver structure 36 is configured to be switchable between the retracted attitude where the driver structure 36 is located on the inboard side and the overhanging attitude where the driver section structure 36 protrudes outward in the lateral direction of the machine.

  To add description, as shown in FIG. 7, the support member 38 includes an inner cylindrical member 41 positioned radially inward and an outer cylindrical member 42 positioned radially outward. The inner cylindrical member 41 is located on the lower side, the outer cylindrical member 42 is located on the upper side, and the inner cylindrical member 41 and the outer cylindrical member 42 are connected by bolts 43 in a state of being partially fitted. By externally connecting the lower portion of the inner cylindrical member 41 to the fixing pin 44 welded and fixed to the body frame 37, the flange portion 45 integrally formed at the lower end is bolted to the body frame 37. The inner cylindrical member 41 is fixed to the machine frame 37. The vertical length of the outer cylindrical member 42 is longer than the vertical length of the inner cylindrical member 41.

  Inside the support member 38, there is provided a bearing portion 46 which rotatably supports and supports the rotation fulcrum member 40 while restricting the position in the axial direction. That is, as shown in FIG. 7, in the inside of the support member 38, the reduced diameter portion 47 is formed by the upper end portion of the inner cylindrical member 41. The inner diameter of the lower portion of the reduced diameter portion 47 is smaller than the inner diameter of the upper portion of the reduced diameter portion 47.

  As shown in FIG. 7, a bush 48 for sliding and guiding is provided on the inner peripheral portion of the reduced diameter portion 47. The lower end portion of the pivot fulcrum member 40 is provided with a pivot shaft 49 having a diameter smaller than the outer diameter of the pivot fulcrum member 40 so as to project downward. The lower end portion of the rotation fulcrum member 40 is received and supported by the upper end surface of the inner cylindrical member 41, and the rotation shaft 49 is fitted to the bush 48 provided on the inner peripheral portion of the reduced diameter portion 47 The support member 38 is rotatably supported around the vertical axis Y1. The rotation shaft formed at the lower end of the rotation fulcrum member 40 is fitted into the bush 48, and the lower end surface of the rotation fulcrum member 40 is brought into contact with the upper end surface 41a of the inner cylindrical member 41 and supported. The inner cylinder member 41 is rotatably supported by and supported by the inner cylinder member 41.

  Accordingly, the upper end portion of the inner cylindrical member 41 functions as the bearing portion 46, and the sliding portion 53 is configured between the pivot shaft portion 49 and the bush 48 provided on the inner peripheral portion of the reduced diameter portion 47. There is. The upper end portion of the rotation fulcrum member 40 is rotatably supported around the vertical axis Y1 by a bracket 50 connected to the side wall 15 of the threshing apparatus 5.

  The inner cylindrical member 41 and the outer cylindrical member 42 are connected by bolts along the radial direction at a plurality of places spaced in the circumferential direction at the places where they fit together. When the bolt connection is released, the inner cylindrical member 41 and the outer cylindrical member 42 can be separated. When the connection between the inner cylindrical member 41 and the outer cylindrical member 42 is released and the outer cylindrical member 42 is removed from the inner cylindrical member 41, the upper end portion of the inner cylindrical member 41 is in the state of being opened outward. Thus, the bush 48 can be easily replaced in a state where the upper end portion of the inner cylindrical member 41 is opened outward.

  With the above configuration, the driving unit structure 36 is rotatably supported by the support member 38 around the vertical axis Y1 via the rotation fulcrum member 40. The driving unit structure 36 having the engine bonnet 35 is supported by the body frame 37 so as to be rotatable about the vertical axis Y1, and the driving unit structure 36 is a part of the driving unit 8 as shown by the solid line in FIG. The attitude is switched between a retracted attitude located on the inner side of the vehicle so as to cover the upper side, and an extended attitude extended outward of the outer body so as to open the upper side of the driving unit 8 as shown by the two-dot chain line in FIG. It is free. By switching the driving unit structure 36 to the overhanging posture, the upper side of the driving unit 8 is largely opened, so maintenance work of the driving unit 8 can be easily performed.

[Grain tank]
As shown in FIG. 8, the bottom of the grain tank 6 is formed in a substantially V-shaped lower taper in a front view, and the lowermost end of the grain tank 6 is a rear part of the stored grain. A transport screw 51 for transporting the side outward is provided. The grain conveyed outward by the conveyance screw 51 to the rear side of the machine body is conveyed by the unloader 9 (see FIGS. 1 and 2) and discharged outside the machine.

  As shown in FIG. 1, the unloader 9 is connected to a longitudinal feed screw conveyor 9A for vertically feeding and conveying grains conveyed by the transport screw 51 upward, and to the upper portion of the longitudinal feed screw conveyor 9A. , And a crossfeed screw conveyor 9B which transports the grain laterally to the discharge port 52 at the tip end.

  As shown in FIG. 10, the grain tank 6 is formed in a downwardly tapered shape in a front view of the machine body, and in a substantially rectangular shape in plan view on the front side of the body in the downwardly inclined bottom inclined surface 6a. In addition, the first concave portion Q1 having a substantially rhombic shape is formed in a front view of the airframe. The first recessed portion Q1 has an inner back vertical surface 6b in a posture along the vertical direction and a posture along the longitudinal direction, and a rear vertical surface 6c in a posture along the vertical direction and along the lateral direction And the upper side 6 d located on the upper side is a recess surrounded by the respective surfaces.

  As shown in FIG. 11, on the upper side of the first recessed portion Q1, there is a front left side surface 6e in a posture along the longitudinal direction positioned close to the right lateral sidewall 15 of the threshing apparatus 5, and its front part An upper slope 6f extending diagonally upward to the left from the upper end of the left side 6e to the upper side of the threshing device 5, and an extending longitudinal surface 6g along a longitudinal direction extending upward from the upper end of the upper slope 6f A bulging portion 6A is formed by a front surface 6h located on the front side and a rear surface 6i located on the rear side. Thus, the grain storage amount is increased by forming the bulging portion 6A that bulges upward of the threshing device 5.

  As shown in FIGS. 10 and 11, a second concave portion Q2 is formed as a concave groove which is continuous with the rear side of the first concave portion Q1 and is positioned higher toward the rear side of the body. The second concave portion Q2 is formed on the inner back side vertical surface 6k formed in a state in which the tank is inward from the right side vertical surface 6j formed vertically from the upper end of the bottom inclined surface 6a, It is formed in the shape of a groove surrounded by respective surfaces of a bottom surface 6l in an oblique posture positioned above and an upper surface 6m in a diagonal posture positioned closer to the rear side of the machine body. An exhaust pipe 75 described later is disposed in the second recessed portion Q2 in a state in which the exhaust pipe 75 is inserted.

  A third concave portion Q3 which is continuous with the rear side of the second concave portion Q2 and extends in the vertical direction is formed. The third recessed portion Q3 is formed in the right side of the grain tank 6 so as to be vertically elongated from the bottom inclined surface 6a to the upper end of the tank and to be recessed on the tank inner side (right side of the machine) ing. The third concave portion Q3 has a rear surface 6i of the bulging portion 6A, a rear vertical surface 6n in an inclined posture located on the rear side and a rear side of the vehicle as it is on the left side, and a width located on the innermost side. It is surrounded and formed by the narrow inner back side vertical surface 6o. The grain conveyor 22 is disposed in the third recessed portion Q3 in a state where the grain conveyor 22 enters.

  The lower end of the corner between the rear vertical surface 6n of the third recess Q3 and the left side 6p of the rear is cut away, the third recess Q3 continues to the rear of the machine, and it is approximately in plan view A fourth recess Q4 of a rhombus (see FIG. 9) is formed. The fourth recessed portion Q4 is a vertical posture, an inner vertical surface 6q in a longitudinal posture, and a vertical posture, and a rear longitudinal of an inclined posture that is positioned closer to the front of the machine from the front end of the inner longitudinal surface 6q The recess 6 is surrounded by the surfaces 6r and the upper side surface 6s in a diagonal posture substantially parallel to the bottom inclined surface 6a. A second reducing device (not shown) for reducing a second object such as a branch with a brow or the like generated in the sorting unit of the threshing device 5 is disposed in the fourth recessed portion Q4 in a state of entering into the fourth recessed portion Q4. .

  At the rear left portion of the grain tank 6, a fifth recessed portion Q5 for allowing passage of a waste straw conveying device (not shown) is formed. As shown in FIG. 11, the fifth concave portion Q5 is provided with an inclined surface 6u in an inclined posture that is positioned on the right side of the machine body toward the rear side of the machine body across the left side face 6p on the rear side and the rear face 6t located on the rear side. It is formed.

  The front left surface 6e and the rear left surface 6p are provided at substantially the same position in the left-right direction of the machine, and the extension side vertical surface 6g of the bulging portion 6A is the front left surface 6e and the rear left surface 6p. It is provided in the position which protrudes in the aircraft right direction rather than. The inner back vertical surface 6k of the second recess Q2 and the inner vertical surface 6q of the fourth recess Q4 are provided at substantially the same position in the left-right direction of the machine.

  As shown in FIG. 2, the grain tank 6 is supported by the body frame 37 so as to be rotatable about the vertical axis Y2, which is the axis of rotation of the vertical feed screw conveyor 9A, and is normally retracted to the inboard side. It is provided so as to be changeable in posture between a posture (a state shown by a solid line in FIG. 2) and an overhanging posture (a state shown by a two-dot chain line in FIG. 2) protruding outward on the side of the machine body. When switching the driving unit structure 36 to the overhanging posture, it is necessary to switch the grain tank 6 to the overhanging posture in advance.

[Drive part]
As shown in FIGS. 3 and 5, the driving unit 8 includes an engine 34, an air cleaner 54, a radiator 55 for cooling the engine, a cooling fan 56, and the like. The air cleaner 54 is provided in the air supply chamber forming portion 35c of the engine bonnet 35, and the precleaner 54a is provided at the rear right side of the roof of the cabin 3, as shown in FIGS. 1 and 2. Then, as shown in FIG. 3, FIG. 5 and FIG. 6, after the first exhaust gas processing device 57 for reducing particulate matter contained in the exhaust gas of the engine 34 and after being processed by the first exhaust gas processing device 57 And a second exhaust gas processing device 58 (corresponding to the exhaust gas processing operation in the present invention) for reducing nitrogen oxides contained in the exhaust gas.

  The first exhaust gas processing device 57 includes a diesel particulate filter (DPF) (not shown), which is a known technique for collecting diesel particulates contained in exhaust gas, and reduces the diesel particulates by passing the exhaust gas.

The second exhaust gas processing device 58 purifies the exhaust gas using selective catalytic reduction (SCR) which is a known technique. Specifically, urea water, which is an example of a reducing agent, is injected into the exhaust gas and hydrolyzed to form ammonia, and the ammonia (NH ₃ ) and nitrogen oxides (NOx) contained in the exhaust gas are chemically reacted The nitrogen oxides contained in the exhaust gas are reduced by reducing them to nitrogen (N ₂ ) and water (H ₂ O).

  As shown in FIGS. 3 and 6, the first exhaust gas processing device 57 is disposed inside the engine bonnet 35. That is, in a state of being biased to the left side of the vehicle than the driver's seat 7, the longitudinal direction is disposed along the longitudinal direction of the machine below the side panel 33 and at the inward position in the lateral direction of the machine above the engine 34. . The first exhaust gas processing device 57 is connected to and supported by the engine 34 by a pair of support portions 59 and 60 on the front and rear sides of the airframe.

  As shown in FIG. 6, an exhaust gas inlet 61 is provided at a lower portion on the front side of the first exhaust gas processing device 57, and the exhaust gas inlet 61 is connected to an exhaust pipe 63 on the engine 34 side. As shown in FIG. 3, an exhaust gas outlet 62 is provided on the right side of the first exhaust gas processing device 57 on the rear side of the airframe.

  As shown in FIGS. 3 and 6, the second exhaust gas processing device 58 is provided outside the engine bonnet 35 and positioned on the rear side of the operation unit 4 in plan view. The second exhaust gas processing device 58 is disposed below the front of the grain tank 6 and is disposed so as to overlap the grain tank 6 in plan view.

  As described above, the grain tank 6 is formed in a downward tapered shape in a front view, and the first concave portion Q1 in which the first inclined portion 6a in the downward tapered shape is recessed toward the inside of the tank is formed. It is formed. And as shown also in FIG. 8, the 2nd exhaust gas processing apparatus 58 is arrange | positioned in the state which entraps in the 1st recessed part Q1.

  As shown in FIGS. 5 and 6, the second exhaust gas processing device 58 includes a cylindrical dosing portion 64 in which urea water is injected and supplied to the exhaust gas supplied from the first exhaust gas processing device 57, and a dosing portion 64. A main body processing unit 65 which has a cylindrical shape having a larger diameter than that and performs reduction processing is provided. The dosing unit 64 and the main processing unit 65 are integrally connected at their lower portions, and are in communication with each other so that the exhaust gas to which urea water is injected and supplied by the dosing unit 64 is supplied to the main processing unit 65. The cylindrical dosing portion 64 and the main body processing portion 65 are each formed to be elongated along a direction along the central axis of the cylindrical shape.

  The main body processing unit 65 is disposed in a posture in which the direction along the central axis of the cylindrical shape follows the vertical direction of the machine. The cylindrical dosing section 64 is disposed on the right side of the main body processing section 65 with respect to the main body processing unit and arranged parallel to the main body processing section 65, with a direction along the central axis of the cylindrical shape following the vertical direction It is done.

  Therefore, the second exhaust gas processing device 58 is disposed in a vertically placed posture with the direction along the central axis of the cylindrical main body processing portion 65 and the dosing portion 64, that is, the longitudinal direction along the vertical direction.

  As shown in FIGS. 3 and 6, the second exhaust gas processing device 58 is a support member that rotatably supports the driver structure 36 by the upper connection support 66 and the lower connection support 67. 38 is supported by the outer cylinder member 42. That is, in each of the upper connection support portion 66 and the lower connection support portion 67, the L-shaped connection bracket 68 in a side view is integrally fixed to the outer peripheral portion of the outer cylindrical member 42. A lateral support 69 is fixed to the outer peripheral portion of the main body processing unit 65 of the second exhaust gas processing device 58 at a position corresponding to the connection brackets 68 on both the upper and lower sides. The second exhaust gas processing device 58 is supported by the outer cylindrical member 42 by connecting the horizontally oriented supports 69 on the upper and lower sides to the connection brackets 68 on the upper and lower sides with bolts.

  As shown in FIG. 3, an exhaust gas outlet portion 62 is formed on the right side (outward side in the widthwise direction of the body) of the first exhaust gas processing device 57 on the rear side of the body. As shown in FIGS. 3 and 5, in the second exhaust gas processing apparatus 58, an exhaust gas supply unit 70 is formed at an upper side portion of the dosing unit 64 located on the right side of the main body processing unit 65 with respect to the main body processing unit.

  As shown in FIG. 3, the exhaust gas outlet portion 62 of the first exhaust gas processing device 57 and the exhaust gas supply portion 70 of the second exhaust gas processing device 58 are communicatively connected via a communication connection pipe 71 as a connection member. The communication connection pipe 71 is flange-connected to the exhaust gas outlet portion 62 of the first exhaust gas processing device 57, and is flange-connected to the exhaust gas supply portion 70 of the second exhaust gas processing device 58.

  The communication connection pipe 71 includes a flexible bellows pipe 71A, and is configured to be able to be bent and deformed. By providing the bellows tube 71A, the vibration of the engine 34 supported by the airframe frame 37 is prevented from being transmitted to the second exhaust gas processing device 58 via the rubber mount, and the second exhaust gas processing device 58 is stabilized. I support it.

  As shown in FIGS. 3 and 5, a urea water tank 72 storing urea water as a reducing agent to be supplied to the second exhaust gas processing device 58 is provided below the floor 32 of the operation unit 4. The urea water tank 72 is supported by the airframe frame 37. Although not described in detail, the urea water in the urea water tank 72 is configured to be supplied to the second exhaust gas processing device 58 through a pipe by a pump. The urea water remaining without being injected is returned to the urea water tank 72.

  As shown in FIG. 6, an exhaust gas outflow pipe 73 is provided on the upper side of the main body processing unit 65 in the second exhaust gas processing device 58 and on the rear side of the airframe. The exhaust gas discharge pipe 73 has a proximal end side 73a extending horizontally or substantially horizontally from the exhaust gas outlet portion 74 of the second exhaust gas processing device 58 toward the rear side of the machine, and an extension end of the proximal end side 73a. And a bent tip side 73b that extends from the rear side of the airframe to the upper side of the airframe. An exhaust pipe 75 is provided for exhausting the exhaust gas which is processed by the first exhaust gas processing device 57 and the second exhaust gas processing device 58 and discharged through the exhaust gas outflow pipe 73 to the outside. The exhaust pipe 75 will be described later.

[Heat shield cover]
As shown in FIG. 3, FIG. 6, FIG. 8, FIG. 13 and FIG. 14, a heat shield cover located between the grain tank 6 and the second exhaust gas treatment device 58 to block the heat of the second exhaust gas treatment device 58 76 are provided. The heat shield cover 76 is provided in a state of covering the upper portion, the portion corresponding to the opposite side to the threshing device 5, and the portion corresponding to the rear portion among the surroundings of the second exhaust gas processing device 58 It is done. To add the description, the heat shield cover 76 covers and shields the portions facing the inner back vertical surface 6b, the rear vertical surface 6c, and the upper side surface 6d in the first recessed portion Q1 of the grain tank 6, respectively. It is provided as.

  The upper side surface 6d of the first recessed portion Q1 of the grain tank 6 is formed in an oblique posture substantially parallel to the bottom inclined surface 6a. That is, the upper side surface 6d has an inclined posture in which the end on the right side (opposite side to the threshing device) connected to the inner back side vertical surface 6b is at the lowest position and the higher toward the left side (tressing device side) Is formed.

  As shown in FIG. 13, the upper surface 77 covering the portion of the heat shield cover 76 facing the upper side surface 6 d of the grain tank 6 is directed toward the threshing device 5 along the upper side surface 6 d of the grain tank 6. It is provided in the inclined posture which becomes a high position. By thus setting the upper surface 77 in the inclined posture, the space on the upper side of the second exhaust gas processing device 58 can be widened, and the heat generated by the second exhaust gas processing device 58 flows into a narrow space. Prevents heat dissipation.

  The upper surface 77 of the heat shield cover 76 in the inclined posture is divided into a proximal end portion 77 a and an extension side portion 77 b connected thereto. The proximal end portion 77a is integrally formed with an inner back surface 78 facing the inner back vertical surface 6b of the grain tank 6 and a rear side surface 79 facing the rear vertical surface 6c of the grain tank 6 . The lower end portion of the extension-side portion 77 b of the upper surface 77 is fixed to the proximal end portion 77 a of the upper surface 77 by connecting a plurality of places with bolts. By releasing the bolt connection, the extension side portion 77b can be removed.

  As shown in FIG. 13 and FIG. 14, the rear side surface 79 of the heat shield cover 76 covering the portion facing the rear vertical surface 6 c of the grain tank 6 has an inclined surface portion 79 a along the rear vertical surface 6 c A laterally extending surface portion 79b extending in the left-right direction, and an upper extending surface portion 79c positioned between the laterally extending surface portion 79b and the extending portion 77b of the upper surface 77 A portion facing the side vertical surface 6c covers substantially the entire area. The insertion part 80 which the waste gas discharge pipe 73 penetrates is formed in the upper-side location of the laterally extending surface part 79b. The upper extension surface portion 79c is provided with a porous member 81 as a vent. The porous member 81 is formed of a net. The porous member 81 is not limited to a mesh, and may be a porous plate or the like in which a large number of holes are bored.

  A porous member 82 serving as a ventilation portion is provided on the inner back surface 78 (corresponding to the side opposite to the threshing device 5 side) of the heat shield cover 76 that covers the part facing the inner back vertical surface 6 b of the grain tank 6. Is equipped. The porous member 82 is formed of a net. The porous member 82 is not limited to a mesh, and may be a porous plate or the like in which a large number of holes are bored.

  A recessed portion 83 recessed toward the threshing device 5 side is formed on the lower side of the inner front surface 78 on the front side of the machine body. By forming the recessed portion 83, a working space for the operator to insert a hand into the driving portion 8 is secured in a state where the grain tank 6 is switched to the overhanging posture.

  As shown in FIG. 14, the left lateral side portion of the second exhaust gas processing device 58 facing the threshing device 5 is open without being covered with the heat shield cover 76. The open portion overlaps with the air intake 26 of the sorted wind of the Chinese apricot 23 in the threshing device 5 in a side view. The rotary valve 23 sucks the air around the second exhaust gas processing device 58 when suctioning the outside air through the air inlet 26 by rotating.

  The air around the second exhaust gas processing device 58 has a high temperature due to the heat generated by the second exhaust gas processing device 58. During the reaping operation in which the bales 23 are in operation, such high temperature air is sucked by the bales 23 and passed through the threshing device 5 and then discharged out of the machine. At this time, as the air around the second exhaust gas processing device 58 is drawn by the chimney 23, the air in the motive power unit 8 is also drawn together. Furthermore, since the low-temperature air outside is sucked through the porous members 82 of the inner back surface 78, the temperature of the air around the second exhaust gas processing device 58 is lowered.

  As in the case of traveling on the road, the air around the second exhaust gas processing device 58 is not sucked by the Karasushi 23 in the state where the Karasmus 23 is not operating, but the air around the second exhaust gas processing device 58 is Since the heat is discharged outward through the porous member 82 of the surface 78, heat does not transfer to the narrow space inside the heat shield cover 76.

  The heat shield cover 76 is fixedly supported by bolting at a plurality of locations to a support (not shown) on the airframe side. When the grain tank 6 is switched to the overhanging posture, the heat shield cover 76 remains on the airframe side. After switching the grain tank 6 to the overhanging posture, when performing the maintenance work by switching the operating part structure 36 to the overhanging posture, the extension side portion 77b and the upper side extension of the upper surface 77 of the heat shield cover 76 Remove the surface portion 79c. Thus, interference with the heat shield cover 76 can be avoided as the driver structure 36 rotates. The upper side extending surface portion 79c is integrally connected to the extending side portion 77b of the upper surface 77 and is easy to handle.

  Thus, the heat shield cover 76 is provided with a space between the second exhaust gas processing device 58 and the grain tank 6 to form a heat insulating layer with air to perform the second exhaust gas treatment. Heat from the device 58 is less likely to be transmitted to the grain tank 6.

  Of the periphery of the second exhaust gas processing device 58, the front side portion facing the motive power unit 8 is open without being covered with the heat shield cover 76. The communication connection pipe 71 for connecting the first exhaust gas processing device 57 and the second exhaust gas processing device 58 provided in the motive power unit 8 can be favorably disposed without interference with the heat shield cover 76.

〔Exhaust pipe〕
The exhaust pipe 75 extends upward between the threshing device 5 and the grain tank 6 so that the exhaust port 84 is positioned above the upper end of the threshing device 5. An exhaust port 84 is formed at the upper end of the exhaust pipe 75, and the upper end of the exhaust pipe 75 extends toward the threshing device 5 side.

  As shown in FIGS. 4 and 12, the exhaust pipe 75 has a first exhaust pipe 75A as a vertically extending pipe located on the second exhaust gas processing device 58 side and an upper end of the exhaust pipe 75 located on the exhaust port 84 side. And a second exhaust pipe 75B as a part. The first exhaust pipe 75A is extended from the location corresponding to the exhaust gas outlet portion 74 of the second exhaust gas processing device 58 along the up and down direction in a backward and upward inclined posture. The second exhaust pipe 75B is curved with respect to the first exhaust pipe 75A and extends toward the threshing device side.

  The first exhaust pipe 75 </ b> A extends from the outlet of the exhaust gas discharge pipe 73 to a position corresponding to the upper end of the threshing device 5. As shown in FIG. 12, the first exhaust pipe 75A has a double pipe structure of a cylindrical inner pipe 85 located inside and a cylindrical outer pipe 86 located outside, and further, A cover member 87 having a substantially U-shaped cross section is provided to cover the second recessed portion Q 2 side of the grain tank 6 in the outer tube 86. In this manner, the heat of the exhaust gas flowing through the inside of the inner pipe 85 is prevented from being transmitted outward.

  The inner pipe 85 is fixed to the outer pipe 86 in a state of being inserted into the outer pipe 86 and protrudes upward from the end of the outer pipe 86. An airframe front side portion of the outer tube 86 is supported on the right side wall of the threshing device 5 via a mounting bracket 88. The rear portion of the outer tube 86 is supported by a connecting member 89 for supporting the grain conveyor 22 on the right side wall of the threshing apparatus 5. The cover member 87 is fixed to a mounting bracket 90 provided on the outer pipe 86 by bolt connection.

  As shown in FIG. 12, the second exhaust pipe 75B is provided larger in diameter than the inner pipe 85 of the first exhaust pipe 75A, and the exhaust flow direction of the second exhaust pipe 75B in the exhaust flow direction and the exhaust flow of the inner pipe 85. A downstream portion of the direction overlaps with the exhaust flow direction, and a gap is formed between them in the radial direction. The exhaust gas can be cooled by sucking outside air from the gap into the interior by the ejector action accompanying the flow of the exhaust gas.

  An exhaust port is formed in the second exhaust pipe 75B, and the second exhaust pipe 75B is curved with respect to the first exhaust pipe 75A and directed to the threshing device 5 side. The second exhaust pipe 75B is formed of a cylindrical body having a substantially circular cross section, and the threshing device 5 in a curved shape so as to bend in a substantially arc shape toward the threshing device 5 as it goes upward in the longitudinal direction of the machine body. It extends to the side. And the exhaust port 84 is formed in the end surface of the front-end | tip part of 2nd exhaust pipe 75B. The exhaust port 84 is formed in such a shape that the upper edge protrudes to the side away from the grain tank 6, that is, to the left side of the machine than the lower edge. The exhaust port 84 is formed in a linear shape in a front-rear direction as viewed from the front and back in an inclined posture in which the upper side is positioned more outward than the lower side.

  And as shown in FIG. 4, the lower edge of the exhaust port 84 is upper so that the upper structural body 27 of the threshing device 5 is allowed to swing to the open position, as the exhaust port 84 of the second exhaust pipe 75B. It is formed in the inclined shape which retires to the grain tank 6 side rather than the edge.

  The end of the exhaust pipe 75 is located below the upper end of the grain tank 6, and the end of the exhaust pipe 75 is located below the transverse feed screw conveyor 9B of the unloader 9 in the storage position. ing. Therefore, the exhaust pipe 75 may not interfere with the crossfeed screw conveyor 9B not only when the crossfeed screw conveyor 9B is stored in the storage position but also when the crossfeed screw conveyor 9B is removed from the storage position due to machine vibration or the like.

  The exhaust gas discharged from the engine 34 is subjected to a purification treatment for reducing diesel particulates in the first exhaust gas treatment device 57, and a purification treatment for reducing nitrogen oxides contained in the exhaust gas in the second exhaust gas treatment device 58. The exhaust gas after the purification treatment is discharged to the outside of the machine through the exhaust pipe 75.

[Another embodiment]
(1) In the above embodiment, the support member is configured to include the cylindrical inner cylindrical member and the cylindrical outer cylindrical member, but instead of this configuration, the inside of one cylindrical body may be inside the cylinder. Alternatively, the diameter reducing portion may be formed by molding.

(2) In the above embodiment, in the inside of the support member, the rotation fulcrum member is received and supported by the step portion at the top of the reduced diameter portion, but instead of this configuration, the inside of the support member is exclusively used It is good also as composition provided separately with a bearing member.

(3) In the above embodiment, the pivot shaft 49 is provided in a state of projecting downward from the lower end of the pivot fulcrum member 40, and the outer periphery of the pivot shaft 49 and the inner periphery of the reduced diameter portion 47 However, instead of this configuration, the lower end portion of the pivoting fulcrum member has a flat shape, and the stepped portion of the reduced diameter portion receives the pivoting fulcrum member, The sliding portion may be provided between the inner peripheral portion of the cylindrical member and the outer peripheral portion of the rotation fulcrum member.

(4) In the above embodiment, the second exhaust gas processing device 58 for reducing nitrogen oxides contained in the exhaust gas is provided as the exhaust gas processing device, but particulate matter contained in the exhaust gas of the engine 34 is reduced. The first exhaust gas processing apparatus 57 may be another type of exhaust gas processing apparatus.

(5) In the above-mentioned embodiment, although what was applied to a self-release type combine was shown, the present invention is applicable also to a common type combine.

  The present invention can be applied to a combine in which the engine bonnet is configured to be switchable between a retracted position where the engine bonnet is located on the inboard side and an extended position where the engine bonnet protrudes outward in the lateral direction of the vehicle.

34 engine 35 engine bonnet 37 body frame 38 support member 40 rotation fulcrum member 41 inner cylinder member 41a upper end portion 42 outer cylinder member 46 bearing portion 47 reduced diameter portion 49 rotation shaft portion 53 sliding portion 58 second exhaust gas processing device ( Exhaust gas treatment equipment)
Y1 vertical axis

Claims (4)

An engine, an engine bonnet that covers the upper side of the engine , a support member that is erected from the machine body frame and has a cylindrical shape, and is integrally connected to the engine bonnet and extends along the vertical direction And a fulcrum member,
The engine bonnet is rotatably supported about the vertical axis in a state in which the pivoting fulcrum member is inserted from above into the support member, whereby the retracting posture in which the engine bonnet is positioned on the inward side of the machine and the lateral side of the machine been made attitude can be switched to configuration over the overhang attitude projecting towards,
Inside the cylinder of the support member, there is provided a bearing portion rotatably receiving and supporting the rotation fulcrum member while restricting the position in the axial direction,
A reduced diameter portion having an inner diameter smaller than the inner diameter at the upper side than the position is formed at an upper and lower position in the inside of the support member,
A combine according to which a lower end portion of the rotation fulcrum member is received and supported by a step portion above the reduced diameter portion, and the reduced diameter portion functions as the bearing portion . The pivot shaft portion is provided in a state of projecting downward from the lower end portion of the pivot fulcrum member,
The combine according to claim 1 , wherein a sliding portion is provided between an outer peripheral portion of the rotating shaft portion and an inner peripheral portion of the reduced diameter portion. The support member includes a cylindrical inner cylindrical member positioned radially inward and downward and a cylindrical outer cylindrical member positioned radially outward and upward of the inner cylindrical member. , Are connected in a state of fitting them partially,
The combine according to claim 1 or 2 , wherein the diameter reducing portion is formed at an upper end portion of the inner cylindrical member, and the inner cylindrical member and the outer cylindrical member are configured to be releasable from each other. The combine according to claim 3 , wherein an exhaust gas processing device for purifying the exhaust gas of the engine is supported on an outer peripheral portion of the outer cylinder member.

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