Harvester

Abstract

To facilitate the maintenance work of a cooling fan in a harvesting machine provided with the cooling fan and a fan shroud between an engine and a radiator.SOLUTION: A fan shroud is divided into a first divided fan shroud 30A containing a first marginal part 37a forming a machine body anteroposterior one side part 31r of a fan opening 31 where a cooling fan 27 is positioned, and a second divided fan shroud 30B containing a second marginal part 37b forming the machine body anteroposterior other side part 31f of the fan opening 31. The first divided fan shroud 30A is made of a resin, and the second divided fan shroud 30B is made of a sheet metal.SELECTED DRAWING: Figure 7

Description

[Technical Field]

[0001] The present invention relates to a harvester provided with a prime mover having an engine. [Background technology]

[0002] Among the above-mentioned harvesters, there is one, such as the harvester (combine) shown in Patent Document 1, in which the driving part has a radiator for cooling the engine that is located laterally outside the body of the machine than the engine, a cooling fan that is rotatably located between the engine and the radiator and introduces cooling air into the radiator, and a fan shroud that is located between the engine and the radiator and has a fan opening in which the cooling fan is located. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2019-116256 Summary of the Invention [Problem to be solved by the invention]

[0004] In the above-described harvester, when performing maintenance work such as cleaning the cooling fan, if the fan shroud is difficult to handle, the fan shroud will be difficult to remove, and the maintenance work will be more time-consuming.

[0005] The present invention provides a harvester in which maintenance work on the cooling fan can be easily performed. [Means for solving the problem]

[0006] The harvester according to the present invention comprises: The aircraft is provided with a driving unit including an engine, a radiator for engine cooling that is located laterally outboard of the engine, a cooling fan that is rotatably located between the engine and the radiator and introduces cooling air into the radiator, and a fan shroud that is located between the engine and the radiator and has a circular fan opening in which the cooling fan is located, the fan shroud being divided into a first divided fan shroud that includes a first edge that forms one side of the fan opening in the fore-and-aft direction of the aircraft, and a second divided fan shroud that includes a second edge that forms the other side of the fan opening in the fore-and-aft direction of the aircraft, the first divided fan shroud being made of resin and the second divided fan shroud being made of sheet metal.

[0007] According to this configuration, the fan shroud is made less susceptible to deformation due to heat and other factors by the second divided fan shroud made of sheet metal, while the fan shroud is made lighter and easier to handle by the first divided fan shroud made of resin, so that the fan shroud can be easily removed to clean the cooling fan and maintenance work on the cooling fan can be easily performed.

[0008] In the present invention, It is preferable that the first fan shroud segment is provided with a plurality of ribs arranged radially around the rotation axis of the cooling fan when viewed in a direction along the rotation axis.

[0009] According to this configuration, the first separate fan shroud is reinforced by the plurality of ribs and is less susceptible to deformation due to heat or the like, thereby providing rigidity to the fan shroud.

[0010] In the present invention, It is preferable that the area of ​​the first divided fan shroud as viewed in a direction along the rotational axis of the cooling fan is larger than the area of ​​the second divided fan shroud as viewed in a direction along the rotational axis.

[0011] According to this configuration, the area of ​​the resin portion of the fan shroud is larger than the area of ​​the sheet metal portion, making the fan shroud lighter and easier to handle.

[0012] In the present invention, It is preferable that the first divided fan shroud is supported by the radiator, and the second divided fan shroud is supported by the first divided fan shroud.

[0013] According to this configuration, the second split fan shroud can be removed while the first split fan shroud remains supported by the radiator, so the second split fan shroud can be easily removed without the need to take the time to hold the first split fan shroud in place.

[0014] In the present invention, The fan shroud is formed in a rectangular shape when viewed in a direction along the rotational axis of the cooling fan, and the first split fan shroud includes the first edge portion, a first upper edge portion extending horizontally from an upper end of the first edge portion to the edge portion of the fan shroud on the other side in the fore-and-aft direction of the aircraft, and a first lower edge portion extending horizontally from a lower end of the first edge portion to the edge portion of the fan shroud on the other side in the fore-and-aft direction of the aircraft, and is formed in a U-shape including corners of the rectangular shape, and the second split fan shroud includes the second edge portion, a second upper edge portion opposite to the first upper edge portion, and a second lower edge portion opposite to the first lower edge portion, and it is preferable that the fan opening is formed by the first edge portion and the second edge portion by filling the area between the first upper edge portion and the first lower edge portion of the first split fan shroud with the second split fan shroud.

[0015] According to this configuration, the fan shroud can be constructed by combining the first and second divided fan shrouds by filling the area between the first upper edge portion and the first lower edge portion of the first divided fan shroud, making it easy to assemble the fan shroud.

[0016] In the present invention, The farm equipment is provided with an operating unit, a harvesting unit that harvests crops planted in the field, a threshing unit that threshes the crops harvested by the harvesting unit, and a storage unit that stores the threshed grains obtained by the threshing unit, and the motor unit is provided below the operating unit, and the storage unit is provided behind the operating unit and is supported so as to be swingable between a closed position for work located behind the operating unit and an open position for maintenance that extends out laterally to the outside of the traveling body, with a vertical axis provided at the rear of the storage unit in the vertical direction of the machine body as a swing fulcrum, and the first edge portion is configured to form the rear part of the fan opening in the fore-and-aft direction of the machine body, and the second edge portion is configured to form the front part of the fan opening in the fore-and-aft direction of the machine body, and it is preferable that the first split fan shroud can be pulled out toward the rear of the machine body when the storage unit is in the open position.

[0017] According to this configuration, the storage section can be set in the open position to create a working space behind the operating section, and the first split fan shroud can be removed from the driving section into this working space.Furthermore, since the first split fan shroud is made of resin and is lightweight, it is easy to remove the first split fan shroud from the driving section. [Brief explanation of the drawings]

[0018] [Figure 1] FIG. 1 is a side view showing the entirety of a normal combine harvester. [Figure 2] FIG. 1 is a plan view showing the entirety of a normal combine harvester. [Figure 3] FIG. [Figure 4] FIG. [Figure 5] FIG. 2 is a plan view showing the radiator, the fan shroud, and the cooling fan. [Figure 6] FIG. 2 is a rear view showing the radiator, the fan shroud, and the cooling fan. [Figure 7] FIG. 4 is a side view showing the fan shroud as viewed from the side opposite to the radiator side. [Figure 8] FIG. 2 is a side view showing the fan shroud in a state where the first fan shroud segment and the second fan shroud segment are separated. [Figure 9] FIG. 4 is a side view showing a fan shroud according to a first alternative embodiment. [Figure 10] FIG. 10 is a side view showing a fan shroud according to a second alternative embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0019] Hereinafter, an embodiment of a conventional combine harvester, which is an example of a harvester according to the present invention, will be described with reference to the drawings.

[0020] [Overall structure] 1 and 2 show a conventional combine harvester for harvesting crops such as rice and wheat. This combine harvester has a traveling body V equipped with a pair of left and right crawler-type traveling devices 2 attached to the lower part of a machine frame 1. A harvesting and transporting unit 3, which harvests planted stalks as the crop to be harvested and transports them rearward, is connected to the front of the traveling body V in a manner that allows it to be raised and lowered and swingable. The traveling body V is further equipped on the machine frame 1 with a threshing unit 4 that threshers the harvested stalks transported from the harvesting and transporting unit 3 and separates the threshed material into grain and straw, a grain tank 5 that serves as a storage unit for storing the grain obtained by the threshing unit 4, a grain discharge device 6 that discharges the grain stored in the grain tank 5 outside the machine, and a driving unit 7 that an operator rides on to operate the combine harvester. This combine is configured as a whole-culm input type that cuts the base of planted culms, harvests them, and then feeds all of the harvested culms into the threshing section 4.

[0021] The driving unit 7 is located on the right side of the front of the machine body, and the grain tank 5 is provided behind the driving unit 7. Furthermore, the threshing unit 4 is located on the left side, and the grain tank 5 is located on the right side, with the threshing unit 4 and the grain tank 5 lined up in the left-right direction. And, below the driving unit 7, a motor unit 20 having an engine 21 for driving is provided.

[0022] In this embodiment, the longitudinal direction of the machine body is defined along the direction of travel of the machine body in the working state, and the left-right direction of the machine body is defined as viewed from the direction of travel of the machine body. That is, the direction indicated by the symbol (F) in Figures 1 and 2 is the front side of the machine body, and the direction indicated by the symbol (B) in Figures 1 and 2 is the rear side of the machine body. The direction indicated by the symbol (L) in Figure 2 is the left side of the machine body, and the direction indicated by the symbol (R) in Figure 2 is the right side of the machine body. Therefore, the left-right direction of the machine body corresponds to the width direction of the machine body.

[0023] The harvesting and conveying section 3 comprises a harvesting section 9 that harvests the planted stalks as the machine moves, and a feeder 10 that conveys the harvested stalks harvested by the harvesting section 9 toward the threshing section 4 at the rear of the machine.The harvesting and conveying section 3 is supported so that it can be freely raised and lowered and swung around a horizontal axis located at the rear end of the feeder 10 by the extension and contraction of a hydraulic cylinder (not shown) for raising and lowering the stalks, which is installed across the machine frame 1 and the feeder 10.

[0024] The harvesting section 9 is equipped with a cutting frame 12 as a framework that supports the entire harvesting section 9, a pair of left and right dividers 13 that separate the planted grain culms to be cut from those to be not, a rotating reel 14 that rakes the planted grain culms to be harvested rearward, a clipper-shaped cutting blade 15 that cuts and cuts the base side of the planted grain culms to be harvested, and an auger 16 that sends the cut cut grain culms laterally to the middle side in the left-right direction, gathers them up, and sends them rearward.

[0025] The grain tank 5 is supported on the machine frame 1 via a connection case 17 provided at the rear of the grain tank 5. The grain discharge device 6 is connected to the connection case 17. The connection case 17 is located on the same axis as the screw axis of the vertical screw conveying section 6a of the grain discharge device 6, and is supported on the machine frame 1 in a state in which it can swing around a vertical axis Y that runs along the up-and-down direction of the machine body as a swing fulcrum. The grain tank 5 is supported on the machine frame 1 in a state in which it can swing around the vertical axis Y as a swing fulcrum between a closed position for work that is located behind the driving section 7 along the fore-and-aft direction of the machine body, and an open position for maintenance that protrudes out to the side of the traveling machine body.

[0026] [Motor unit] 1 and 2, the motor unit 20 is provided below the driver's unit 7. As shown in FIGS. 3 and 4, the motor unit 20 has an engine room 23 formed by a seat support base 22 to which the driver's seat 8 is attached. The seat support base 22 has a top panel portion 22a to which the driver's seat 8 is attached, and a front wall portion (not shown) that extends downward from the front of the top panel portion 22a and covers the engine 21 from the front.

[0027] As shown in FIGS. 1, 2, 3, and 4, an engine 21 is provided in an engine compartment 23. The engine 21 is provided with a crankshaft (not shown) aligned in the width direction of the aircraft. A radiator 25 for cooling the engine is provided laterally outward of the engine 21. The radiator 25 is supported by a support frame 26 erected on the aircraft frame 1. A cooling fan 27 and a fan shroud 30 are provided between the radiator 25 and the engine 21. The fan shroud 30 is supported by the radiator 25. An intercooler 28 for cooling the combustion air supplied to the engine 21 and a condenser assembly (not shown) for air conditioning are provided on the opposite side of the radiator 25 from the side where the engine 21 is located. A dustproof case 29 is provided laterally outward of the radiator 25. For convenience, the radiator 25 is omitted from FIG. 1, and the cooling fan 27 is omitted from FIG. 3.

[0028] 3, 4, 5, and 6, cooling fan 27 is rotatably supported by support portion 21a of engine 21 while being located in fan opening 31 (see FIG. 7) provided in fan shroud 30. Cooling fan 27 is driven by engine 21 via endless rotating belt 21c wound around a pulley portion of cooling fan 27 and output pulley 21b of engine 21, and is configured to draw outside air from engine compartment 23 into engine compartment 23 through intake opening 29a (see FIG. 1) equipped with three upper and lower stages of dust removal members provided in dustproof case 29, generate cooling air, and introduce the generated cooling air into radiator 25.

[0029] The dustproof case 29 is supported by the support frame 26 via a hinge portion 29b (see FIGS. 1 and 3) provided at the rear of the dustproof case 29. The dustproof case 29 is supported by the support frame 26 in a swingable state between a closed state in which the engine room 23 is covered from the outside of the side of the machine body, and an open state in which the engine room 23 is uncovered, with the opening and closing axis of the hinge portion 29b extending in the up-down direction of the machine body as a swing fulcrum.

[0030] [Fan shroud] As shown in Figures 3, 4, 5, and 6, the fan shroud 30 is arranged between the engine 21 and the radiator 25, with a circular fan opening 31 (see Figure 7) in which the cooling fan 27 is located, and is configured to be supported by the radiator 25.

[0031] As shown in FIGS. 7 and 8 , the edge 37 of the fan shroud 30 that defines the fan opening 31 is divided into a first edge 37a that defines the rearward portion 31r of the fan opening 31 and a second edge 37b that defines the forward portion 31f of the fan opening 31. The fan shroud 30 is divided into a first divided fan shroud 30A that includes the first edge 37a and a second divided fan shroud 30B that includes the second edge 37b. The first divided fan shroud 30A is made by molding a resin material, i.e., made of resin. The second divided fan shroud 30B is made by molding a metal sheet, i.e., made of sheet metal. The second divided fan shroud 30B, made of sheet metal, provides the fan shroud 30 with a property that is resistant to deformation due to heat and the like, and the first divided fan shroud 30A, made of resin, provides a property that is light in weight.

[0032] 7 and 8, the first divided fan shroud 30A is provided with a plurality of ribs 40 arranged radially around the rotation axis Z when viewed in a direction along the rotation axis Z of the cooling fan 27. The first divided fan shroud 30A is reinforced by the plurality of ribs 40. In this embodiment, the plurality of ribs 40 are provided on the side surface of the first divided fan shroud 30A opposite the radiator side, but the ribs 40 can also be provided on the side surface of the first divided fan shroud 30A facing the radiator.

[0033] As shown in Figures 7 and 8, the fan shroud 30 is configured so that the area of ​​the first divided fan shroud 30A when viewed in a direction along the rotation axis Z is larger than the area of ​​the second divided fan shroud 30B when viewed in a direction along the rotation axis Z.

[0034] As shown in Fig. 7, the fan shroud 30 is formed in a quadrangular shape in the direction along the rotation axis Z. As shown in Fig. 8, the first divided fan shroud 30A includes a first edge portion 37a, as well as a first upper side portion 72 extending horizontally from an upper end portion 70 of the first edge portion 37a to an edge portion 71 of the fan shroud on the front side of the airframe, and a first lower side portion 74 extending horizontally from a lower end portion 73 of the first edge portion 37a to an edge portion 71 of the fan shroud 30 on the front side of the airframe, and is formed in a U-shape including quadrangular corners.

[0035] 7 and 8 , the second divided fan shroud 30B includes a second edge portion 37b, a second upper edge portion 75 that faces the first upper edge portion 72 of the first divided fan shroud 30A, and a second lower edge portion 76 that faces the first lower edge portion 74 of the first divided fan shroud 30A, and is configured so that the fan opening 31 is defined by the first edge portion 37a and the second edge portion 37b by filling the area between the first upper edge portion 72 and the first lower edge portion 74 of the first divided fan shroud 30A with the second divided fan shroud 30B. By filling the area between the first upper edge portion 72 and the first lower edge portion 74 of the first divided fan shroud 30A with the second divided fan shroud 30B, the first divided fan shroud 30A and the second divided fan shroud 30B can be combined to form the fan shroud 30.

[0036] FIG. 7 is a side view of the fan shroud 30 as seen in the direction along the rotation axis Z from the side opposite to the radiator side.

[0037] 5, 6, and 7, the fan shroud 30 is formed in a rectangular shape when viewed in a direction along the rotation axis Z. The fan shroud 30 is provided with a vertical plate portion 32 having a circular fan opening 31. The vertical plate portion 32 is formed in a rectangular shape in a direction along the rotation axis Z. An upper wall plate portion 33 extends from an upper horizontal side portion 32a of the vertical plate portion 32 obliquely upward toward the radiator 25 and outward to the right of the aircraft. A lower wall plate portion 34 extends from a lower horizontal side portion 32b of the vertical plate portion 32 obliquely downward toward the radiator 25 and outward to the right of the aircraft. A front wall plate portion 35 extends from a front vertical side portion 32c of the vertical plate portion 32 obliquely forward toward the radiator 25 and outward to the right of the aircraft. A rear wall plate 36 extends from the rear vertical side portion 32d of the vertical plate portion 32 diagonally rearward toward the radiator 25, outwardly to the right of the aircraft. The fan shroud 30 is configured in a trumpet shape that widens toward the radiator, with the distance between the upper wall plate 33 and the lower wall plate 34 and the distance between the front wall plate 35 and the rear wall plate 36 both widening toward the radiator. Flanges 33a, 34a, 35a, 36a that face the radiator 25 are provided at the radiator-side ends of the upper wall plate 33, the lower wall plate 34, the front wall plate 35, and the rear wall plate 36, respectively.

[0038] The first divided fan shroud 30A includes a portion 32e of the vertical plate portion 32 that is located around the first edge portion 37a, the upper wall plate portion 33, the lower wall plate portion 34, the rear wall plate portion 36, and a lower portion 35b of the front wall plate portion 35. The portion of the upper wall plate portion 33 that is on the front side of the aircraft body is included in the first upper edge portion 72, and the portion of the lower wall plate portion 34 that is on the front side of the aircraft body is included in the first lower edge portion 74.

[0039] The second divided fan shroud 30B includes a portion 32f of the vertical plate portion 32 that is located around the second edge portion 37b, and an upper portion 35c of the front wall plate portion 35.

[0040] The fan shroud 30 is supported on the radiator 25 by the first fan shroud segment 30A being supported on the radiator 25 and the second fan shroud segment 30B being supported on the first fan shroud segment 30A.

[0041] Specifically, as shown in Figures 7 and 8, mounting portions 41 are provided at four corners of the outer periphery of first split fan shroud 30A. As shown in Figures 5, 6, and 7, each of the four mounting portions 41 has a connecting hole 41a, and connecting bolts 42 are passed through connecting holes 41a from the side opposite to the radiator side and engage with supports 25a provided on radiator 25, thereby connecting first split fan shroud 30A to radiator 25.

[0042] As shown in FIG. 8 , the first split fan shroud 30A is provided with a threaded hole member 49 embedded in the upper end 70 of the first edge portion 37a, a connecting hole 39 drilled in the lower end 73 of the first edge portion 37a, and threaded hole members 50 provided at the end of the first upper side portion 72 opposite the side where the upper end 70 is located and at the end of the first lower side portion 74 opposite the side where the lower end 73 is located. The threaded hole of the threaded hole member 49 opens in the fore-and-aft direction of the aircraft. The threaded hole member 50 opens in the lateral direction of the aircraft. The upper end 43 of the second edge portion 37b of the second split fan shroud 30B has a connecting hole 43a, and is configured to be connected to the upper end 70 of the first edge portion 37a by engaging a connecting bolt 47 passing through the connecting hole 43a from the front side of the aircraft with the threaded hole member 49. Lower end 44 of second edge portion 37b of second split fan shroud 30B has connecting bolt 45 attached to lower end 44 by welding, and connecting bolt 45 is inserted into connecting hole 39 of first edge portion 37a and tightened with threaded hole member 51 to connect to lower end 73 of first edge portion 37a. The flange portion of flange portion 35a provided on front wall plate 35 located on second split fan shroud 30B has connecting holes 46 provided at each of the upper and lower ends of this flange portion, and connecting bolt 52 passed through connecting hole 46 at the upper end engages with threaded hole member 50 of first upper side portion 72, and connecting bolt 52 passed through connecting hole 46 at the lower end engages with threaded hole member 50 of first lower side portion 74, thereby connecting first upper side portion 72 and first lower side portion 74.

[0043] 5 and 7 , protruding ribs 53 protruding from flange portion 33a, flange portion 34a, flange portion 35a, and flange portion 36a of fan shroud 30 toward radiator 25 are provided between the radiator 25 and each of flange portions 33a, 34a, 35a, and 36a, and sealing members 54 pressed against radiator 25 by ribs 53. Protruding ribs 53 protruding from flange portion 35a toward radiator 25 are provided between flange portion 35a of fan shroud 30 and radiator 25, and sealing members 54 pressed against radiator 25 by ribs 53. A seal is formed between fan shroud 30 and radiator 25 by ribs 53 and sealing members 54.

[0044] When performing maintenance such as cleaning and inspection of the cooling fan 27, at least the first divided fan shroud 30A can be removed from the engine compartment .

[0045] That is, the grain tank 5 is moved to the open position to ensure a working space behind the power plant 20. Tools or the like are inserted into the engine room 23 through an openable working opening 55 (see FIG. 4) provided in the front wall of the seat support base 22 to remove the connecting bolts 47 and 52, and tools or the like are inserted into the engine room 23 from the working space behind the power plant 20 through an opening 24 (see FIG. 3) in the engine room 23 facing the rear of the machine body to remove the screw hole member 51, and the second split fan shroud 30B is removed from the first split fan shroud 30A. Next, the two connecting bolts 42 on the front side of the aircraft of the four connecting bolts 42 on the first split fan shroud 30A are removed through the work opening 55 of the seat support base 22, and tools or the like are inserted into the engine room 23 from the work space behind the power plant 20 through the rearward opening 24 of the engine room 23, and the two connecting bolts 42 on the rear side of the aircraft of the four connecting bolts 42 on the first split fan shroud 30A are removed, thereby allowing the first split fan shroud 30A to be removed from the radiator 25 and extracted from the engine room 23 to the rear of the power plant 20 through the rearward opening 24 of the engine room 23.

[0046] [Another embodiment] (1) In the above embodiment, an example was shown in which the edge forming the rearward portion of fan opening 31 was set as first edge 37a and the divided fan shroud including first edge 37a was made of resin as first divided fan shroud 30A, and the edge forming the forward portion 31f of fan opening 31 was set as second edge 37b and the divided fan shroud including second edge 37b was made of sheet metal as second divided fan shroud 30B, but this is not limited to this. That is, the portion forming the forward portion 31f of fan opening 31 may be set as the first edge and the divided fan shroud including this first edge may be made of resin as first divided fan shroud, and the edge forming the rearward portion 31r of fan opening 31 may be set as the second edge and the divided fan shroud including this second edge may be made of sheet metal as second divided fan shroud.

[0047] (2) Figure 9 is a side view of a fan shroud 30 according to a first alternative embodiment. The fan shroud 30 according to the first alternative embodiment is divided into a first separate fan shroud 30A made of resin and a second separate fan shroud 30B made of sheet metal by a division point 60 that runs along the vertical direction of the aircraft and passes through the rotational axis Z of the cooling fan 27. The area of ​​the first separate fan shroud 30A in the direction along the rotational axis Z is the same as the area of ​​the second separate fan shroud 30B in the direction along the rotational axis Z.

[0048] (3) Figure 10 is a side view of a fan shroud 30 according to a second alternative embodiment. The fan shroud 30 according to the second alternative embodiment is divided into a first separate fan shroud 30A made of resin and a second separate fan shroud 30B made of sheet metal by a division point 60 that runs along the vertical direction of the aircraft and passes through rotational axis Z of cooling fan 27, and the first separate fan shroud 30A is divided into an upper first separate fan shroud 30A1 and a lower first separate fan shroud 30A2 by a division point 61 that runs along the fore-aft direction of the aircraft and passes through rotational axis Z of cooling fan 27.

[0049] (3) In the above embodiment, an example in which the ribs 40 are provided is shown, but the ribs 40 may not be provided.

[0050] (4) In the above embodiment, an example is shown in which the first divided fan shroud 30A is supported by the radiator 25 and the second divided fan shroud 30B is supported by the first divided fan shroud 30A, but this is not limited to this. The second divided fan shroud 30B may be supported by the radiator 25 and the first divided fan shroud 30A may be supported by the second divided fan shroud 30B, or the first divided fan shroud 30A and the second divided fan shroud 30B may be supported separately by the radiator 25.

[0051] (5) In the above embodiment, an example was shown in which a grain tank was provided as the storage unit, but a bagging hopper can also be used as the storage unit. [Industrial Applicability]

[0052] The present invention is applicable to conventional combine harvesters and head-feeding combine harvesters, and is also applicable to harvesters that harvest various crops such as rice, wheat, corn, and carrots. [Explanation of symbols]

[0053] 4. Threshing Department 7. Driving Department 9. Harvesting Section 20 Power Plant 21 Engine 23 Radiator 27 Cooling fan 30 Fan shroud 30A 1st division fan shroud 30B Second split fan shroud 31 Fan opening 31r The rear part of the fan opening (one side of the aircraft in the fore-and-aft direction) 31f The front part of the fan opening (the other side of the aircraft in the fore-and-aft direction) 37a 1st edge 37b 2nd edge 40 Ribs 70 Upper end 71 Edge 72 First upper edge 73 Lower end 74 First bottom part 75 Second upper edge 76 Second bottom part Y vertical axis Z rotation axis

Claims

1. a driving unit including an engine, a radiator for cooling the engine that is provided laterally outward of the engine, a cooling fan that is rotatably provided between the engine and the radiator and that introduces cooling air into the radiator, and a fan shroud that is provided between the engine and the radiator and has a circular fan opening in which the cooling fan is located, the fan shroud is divided into a first divided fan shroud including a first edge portion that forms one side portion of the fan opening in the longitudinal direction of the airframe, and a second divided fan shroud that includes a second edge portion that forms the other side portion of the fan opening in the longitudinal direction of the airframe, the first split fan shroud is made of resin, The harvester, wherein the second split fan shroud is made of sheet metal.

2. The harvester according to claim 1 , wherein the first divided fan shroud is provided with a plurality of ribs arranged radially around the rotation axis of the cooling fan when viewed in a direction along the rotation axis.

3. The harvester according to claim 1 , wherein an area of ​​the first divided fan shroud when viewed in a direction along the rotation axis of the cooling fan is larger than an area of ​​the second divided fan shroud when viewed in a direction along the rotation axis.

4. the first split fan shroud is supported by the radiator; 2. The harvester of claim 1, wherein said second split fan shroud is supported by said first split fan shroud.

5. the fan shroud is formed in a quadrangular shape when viewed in a direction along a rotation axis of the cooling fan, the first split fan shroud includes the first edge portion, a first upper side portion extending horizontally from an upper end portion of the first edge portion to an edge portion of the fan shroud on the other side in the longitudinal direction of the airframe, and a first lower side portion extending horizontally from a lower end portion of the first edge portion to the edge portion of the fan shroud on the other side in the longitudinal direction of the airframe, and is formed into a U-shape including corners of the quadrangular shape, the second divided fan shroud includes the second edge portion, a second upper side portion opposite to the first upper side portion, and a second lower side portion opposite to the first lower side portion, A harvester as described in any one of claims 1 to 4, wherein the fan opening is formed by the first edge portion and the second edge portion by filling the area between the first upper edge portion and the first lower edge portion of the first divided fan shroud with the second divided fan shroud.

6. The farm is provided with an operating unit, a harvesting unit that harvests crops planted in a field, a threshing unit that threshes the crops harvested by the harvesting unit, and a storage unit that stores the threshed grains obtained by the threshing unit, The driving unit is provided below the driving unit, The storage section is provided behind the driving section, and is supported so as to be swingable between a closed position for work located behind the driving section and an open position for maintenance that protrudes laterally outward from the traveling body, with a vertical axis provided at the rear of the storage section along the vertical direction of the machine body as a swing fulcrum, the first edge portion defines a rear portion of the fan opening in the longitudinal direction of the aircraft, and the second edge portion defines a front portion of the fan opening in the longitudinal direction of the aircraft, The harvester according to any one of claims 1 to 4, wherein the first split fan shroud is removable toward the rear of the vehicle body when the storage section is in the open position.

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