Mobile vehicle

Abstract

To provide a mobile vehicle capable of performing easily a maintenance work of a cooling device.SOLUTION: A mobile vehicle includes a radiator, a fan for blowing to the radiator, a radiator frame 26 for supporting the radiator, a dust-proof section for removing dust from wind sent to the radiator, a cooling device 40 arranged between the radiator and the dust-proof section, and a frame 41 for supporting the cooling device 40.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a work vehicle. [Background technology]

[0002] The combine harvester described in Patent Document 1 is configured to cool the radiator by drawing in outside air through a dustproof case equipped with a porous air intake using ventilation from a cooling fan. An oil cooler that cools the hydraulic oil is fixedly attached to the engine bonnet, positioned where the intake outside air passes. The engine bonnet is configured to be roughly box-shaped and cover the entire power plant, with the driver's seat supported on top. When performing maintenance work on the power plant, the entire engine bonnet is configured to rotate around a longitudinal axis to open the area above the power plant. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2011-244785 Summary of the Invention [Problem to be solved by the invention]

[0004] In the conventional configuration described above, the cooling device (e.g., oil cooler) is fixedly attached to the engine bonnet. Therefore, when performing maintenance work on the cooling device, such as removing dust or repairing or inspecting it, the engine bonnet must be rotated to expose the cooling device. Furthermore, cleaning the front and back surfaces of the cooling device requires removing the cooling device from the engine bonnet, which is a cumbersome and time-consuming process. Incidentally, when the cooling device is fixedly attached to the engine bonnet, it is firmly attached by connecting it to multiple locations (at least four or more), making the process of removing the cooling device from the engine bonnet cumbersome.

[0005] An object of the present invention is to provide a work vehicle that makes it possible to easily perform maintenance work on a cooling device. [Means for solving the problem]

[0006] The characteristic configuration of the work vehicle to achieve the above-mentioned objective is that it is equipped with a radiator provided on the running body, a dustproof section located outside the running body relative to the radiator and which removes dust from the wind sent to the radiator, and a cooling device provided between the radiator and the dustproof section, and the cooling device is configured to be switchable between a usage state in close proximity to the radiator and a maintenance state away from the radiator.

[0007] In the present invention, it is preferable that the dustproof section be configured to be switchable between a use state in the vicinity of the cooling device and a maintenance state away from the cooling device.

[0008] In the present invention, it is preferable that the dustproof portion be switched between the use state and the maintenance state by moving in a predetermined direction.

[0009] In the present invention, it is preferable that the cooling device is switched between the usage state and the maintenance state with a portion of it being supported by the running body, and that the dustproof part is switched between the usage state and the maintenance state with a portion of it being supported by the running body.

[0010] In the present invention, it is preferable that the cooling device be switched between the use state and the maintenance state by swinging.

[0011] In the present invention, it is preferable that the cooling device be switched between the use state and the maintenance state by swinging about a swing axis extending along the up-and-down direction of the traveling machine body.

[0012] In the present invention, it is preferable that the cooling device is fixed to the traveling machine body in the use state.

[0013] In the present invention, the cooling device is provided with a first cooling device, which is the cooling device, and a second cooling device, which is also the cooling device and is provided between the first cooling device and the dustproof part, and it is preferable that the first cooling device is switched from the usage state to the maintenance state by moving in a first direction, and the second cooling device is switched from the usage state to the maintenance state by moving in a second direction different from the first direction.

[0014] In the present invention, it is preferable that the cooling device includes a third cooling device provided between the radiator and the first cooling device.

[0015] In the present invention, it is preferable that the third cooling device is configured to be swingable within a horizontal plane.

[0016] In the present invention, it is preferable that the third cooling device overlaps at least a portion of the first cooling device and at least a portion of the second cooling device when viewed in the left-right direction of the traveling machine body.

[0017]

[0018]

[0019]

[0020]

[0021] [Brief explanation of the drawings]

[0022] [Figure 1] FIG. 1 is an overall side view of a combine harvester. [Figure 2] FIG. 1 is an overall plan view of a combine harvester. [Figure 3] FIG. 2 is a right side view showing the arrangement of a condenser, an oil cooler, and an intercooler. [Figure 4] FIG. [Figure 5] FIG. [Figure 6] FIG. 10 is a plan view showing a state in which the capacitor and the frame are fixed. [Figure 7] FIG. 10 is a plan view showing a state in which the capacitor and the frame are swung. [Figure 8] FIG. 10 is a plan view showing a state in which the condenser and the frame are detached from the radiator frame. [Figure 9] FIG. 4 is a plan view showing a state in which the oil cooler is fixed. [Figure 10] FIG. 4 is a plan view showing a state in which the oil cooler is swung. [Figure 11] 10 is a rear view showing a state in which the intercooler is fixed (solid lines) and a state in which the intercooler is swung (phantom lines). FIG. [Figure 12] FIG. 10 is a right side view showing the state in which the fixing member is attached to the upper frame-shaped portion. [Figure 13] FIG. 10 is a right side view showing the state in which the fixing member has been removed from the upper frame-shaped portion. [Figure 14] 14 is a cross-sectional view taken along the line XIV-XIV in FIG. 12. [Figure 15] FIG. 4 is a right side view showing the arrangement of the sub-oil cooler. [Figure 16] FIG. 4 is a vertical cross-sectional view showing the shape of a penetration portion of an upper hydraulic oil pipe. [Figure 17] FIG. 10 is a rear view showing the shape of the penetration portion of the upper hydraulic oil pipe. [Figure 18] FIG. 4 is a vertical cross-sectional view showing the shape of a penetration portion of a lower hydraulic oil pipe. [Figure 19] FIG. 10 is a rear view showing the shape of the penetration portion of the lower hydraulic oil pipe. DETAILED DESCRIPTION OF THE INVENTION

[0023] Hereinafter, an embodiment of a work vehicle according to the present invention will be described with reference to the drawings, in which the work vehicle is applied to a standard combine harvester as an example of the work vehicle.

[0024] In this embodiment, the direction indicated by the symbol (F) in each figure is the front of the aircraft, the direction indicated by the symbol (B) is the rear of the aircraft, the direction indicated by the symbol (L) is the left side of the aircraft, and the direction indicated by the symbol (R) is the right side of the aircraft.

[0025] [Overall structure] Figures 1 and 2 show a conventional combine harvester. The traveling body of this combine harvester is equipped with a machine frame 1 and a crawler traveling device 2. A harvesting section 3 that harvests planted culms in the field is provided in front of the traveling body. The harvesting section 3 is equipped with a raking reel 4 that rakes in the planted culms, a cutting blade 5 that cuts the planted culms, and an auger 6 that feeds the harvested culms laterally in the cutting width direction, gathers them, and sends them rearward.

[0026] The driving unit 7 is provided behind the harvesting unit 3. The driving unit 7 is covered by a cabin 8. A grain tank 9 for storing grain obtained through threshing is provided behind the driving unit 7. A threshing device 10 for threshing the entire culm of the harvested grain is provided alongside the grain tank 9. A feeder 11 for transporting the entire culm of the harvested grain towards the threshing device 10 is provided between the harvesting unit 3 and the threshing device 10. The driving unit 7 is provided with a driver's seat 12 and an operation panel 13 equipped with various operating tools. A motor unit 15 is provided below the driving unit 7.

[0027] [Motor unit] As shown in FIGS. 1, 2, 4, and 5, the driving unit 15 includes an engine 16, a radiator 17 for cooling the engine, and a cooling fan 18 for drawing in outside air and blowing it to the radiator 17 for cooling. 8、 A fan shroud 19 that guides outside air from the radiator 17 to the cooling fan 18 is provided.

[0028] As shown in Fig. 2, an engine room bonnet 21 is provided, which covers the engine 16 from above to form an engine room 20. The engine room bonnet 21 supports the driver's seat 12 from below and is open laterally outward. The radiator 17 is provided in the engine room 20, laterally outward of the engine 16. The cooling fan 18 is provided in the engine room 20, laterally inward of the radiator 17.

[0029] The outer lateral side of the engine compartment 20 is covered by a dustproof case 22 (an example of a dustproof portion) located on the outer lateral side of the aircraft relative to the radiator 17. A dustproof mesh 23 (FIG. 1) that allows ventilation while preventing the passage of dust is provided on the outer lateral side of the dustproof case 22. In other words, the dustproof case 22 removes dust from the wind blown to the radiator 17.

[0030] The dustproof case 22 is supported by the radiator frame 26 in a state in which it can swing open and closed about a vertical axis Y1. By swinging about the vertical axis Y1, the dustproof case 22 can swing between a closed position (solid line in FIG. 2) in which the dustproof case 22 covers the outside of the engine compartment 20 and an open position (phantom line in FIG. 2) in which the dustproof case 22 exposes the outside of the engine compartment 20.

[0031] The cooling fan 18 draws in outside air through the closed dustproof case 22 to cool the radiator 17. A fan shroud 19 is provided between the radiator 17 and the cooling fan 18 to guide the cooling air from the cooling fan 18 so that it passes through the radiator 17 efficiently. The fan shroud 19 is provided across the cooling fan 18 and the radiator 17, surrounding the outer periphery of the intake space between the cooling fan 18 and the radiator 17.

[0032] The radiator 17 is supported by a radiator frame 26. The radiator frame 26 covers the air intake space between the radiator 17 and the dustproof case 22 and is formed in a frame shape along the outer periphery of the radiator 17 so that outside air that has passed through the dustproof case 22 is guided to the radiator 17. That is, as shown in FIG. 3 etc., the radiator frame 26 has a lower lower frame portion 26a, a front lower front frame portion 26b, a front upper diagonal frame portion 26c, an upper upper frame portion 26d, and a rear lower rear frame portion 26e, and is provided along the outer periphery of the radiator 17. The bottom of the radiator frame 26 is supported by the aircraft frame 1.

[0033] A condenser 40 ( Cooling equipment and an example of a first cooling device) and an oil cooler 60 ( Cooling equipment and No. 3 An example of a cooling device) and an intercooler 80 ( Cooling equipment and No. 2 An example of a cooling device is provided.

[0034] [Condenser (first cooling device)] The condenser 40 cools the refrigerant of an air conditioner (not shown) arranged in the driving section 7 and condenses the refrigerant. A frame 41 is provided to support the upper end of the condenser 40. The condenser 40 is supported by the frame 41 via front and rear support portions 41a. The lower end of the condenser 40 is detachably attached to the lower frame portion 26a of the radiator frame 26 via the front and rear support portions 40a.

[0035] The frame 41 is a plate-like member extending in the longitudinal direction of the vehicle body. The frame 41 is supported by the radiator frame 26 via one hinge portion A in a swingable state, and is detachable from the radiator frame 26 at the hinge portion A.

[0036] The frame 41 will be further described with reference to Figures 3 to 8. The front end of the frame 41 is supported by the front frame-shaped portion b of the radiator frame via a bracket . More specifically, a bolt 42a is inserted through a through-hole (not shown) in the front end of the frame 41 and a through-hole (not shown) in the rear end of the bracket 42. The front end of the frame 41 is attached to the rear end of the bracket 42 by the bolt 42a in a state in which the frame 41 can swing around the vertical axis Y2 relative to the bracket 42. The front end of the bracket 42 is detachably attached to the front frame-shaped portion 26b of the radiator frame 26 by three bolts 42b.

[0037] The rear end of the frame 41 is supported by the rear frame portion 26e of the radiator frame 26 via a bracket 43. More specifically, the rear end of the frame 41 is detachably attached to the front end of the bracket 43 by a bolt 43a. The rear end of the bracket 43 is attached to the rear frame portion 26e of the radiator frame 26 by a bolt 43b or the like.

[0038] The swing of the frame 41 and the condenser 40 will now be described. The frame 41 and the condenser 40 can swing forward around the vertical axis Y2 from the fixed state shown in FIGS. 3 and 6 to the swing state shown in FIG. 7. To swing, first, the fastening by the bolt 43a is released, and the rear end of the frame 41 is detached from the bracket 43. Then, the fastening by the support portion 40a is released, and the lower end of the condenser 40 is detached from the radiator frame 26 (lower frame portion 26a). This allows the frame 41 and the condenser 40 to swing forward around the vertical axis Y2. The bolt 42a and the bracket 42 form a hinge portion A that enables the swinging of the frame 41 about the vertical axis Y2.

[0039] The detachment of the frame 41 and the condenser 40 will now be described. The frame 41 and the condenser 40 can change state from the fixed state shown in FIGS. 3 and 6 to the detached state shown in FIG. 8. To detach them, first, the bolt 43a is released to detach the rear end of the frame 41 from the bracket 43, as in the swinging motion described above, and then the support portion 40a is released to detach the lower end of the condenser 40 from the radiator frame 26 (lower frame portion 26a). Then, the three bolts 42b are released to detach the bracket 42 from the radiator frame 26 (front frame portion 26b). This allows the condenser 40, frame 41, and bracket 42 to be detached as a unit from the radiator frame 26, as shown in FIG. 8.

[0040] An upper refrigerant pipe 44 and a lower refrigerant pipe 45, which are hoses through which a refrigerant (fluid) flows, are connected to the front end of the condenser 40. The upper refrigerant pipe 44 and the lower refrigerant pipe 45 are connected to an air conditioner (a device to be cooled, not shown) provided in the driving unit 7. The upper refrigerant pipe 44 extends forward from its connection to the condenser 40 in the fore-and-aft direction of the aircraft, passes near the bolt 42a, and extends through a through-hole (not shown) in the front frame portion 26b of the radiator frame 26 to the outside of the intake space. That is, the upper refrigerant pipe 44 extends toward the hinge portion A in the extension direction of the frame 41 and passes near the hinge portion. The lower refrigerant pipe 45 extends upward from its connection to the condenser 40, extends forward in the fore-and-aft direction of the aircraft, passes near the bolt 42a in a plan view, and extends through a through-hole (not shown) in the front frame portion 26b of the radiator frame 26 to the outside of the intake space. That is, the lower refrigerant pipe 45 extends toward the hinge portion A along the extending direction of the frame 41, and passes through the vicinity of the hinge portion.

[0041] When the frame 41 and the condenser 40 are detached from the radiator frame 26 (FIG. 8), the upper refrigerant pipe 44 and the lower refrigerant pipe 45 support the frame 41 and the condenser 40. The upper refrigerant pipe 44 and the lower refrigerant pipe 45 are flexible, allowing the frame 41 and the condenser 40 to be moved to any desired position, facilitating maintenance of the condenser 40. Furthermore, the upper refrigerant pipe 44 and the lower refrigerant pipe 45 can be pulled out from through holes (not shown) in the front frame portion 26b of the radiator frame 26, thereby expanding the range of movement of the frame 41 and the condenser 40.

[0042] [Oil cooler (second 3 cooling device)] The oil cooler 60 cools the hydraulic oil of the transmission (not shown). As shown in Fig. 3, the oil cooler 60 is disposed between the radiator 17 and the condenser 40, with the lower part of the oil cooler 60 overlapping with the frame 41 when viewed in the left-right direction of the aircraft body.

[0043] The oil cooler 60 is detachably attached to frames 61 and 62 by four mounting portions 60a at the front, rear, top and bottom using bolts. The frames 61 and 62 are plate-shaped members extending in the vertical direction, and their lower ends are fixed to the lower frame portion 26a of the radiator frame 26. The upper end of the frame 61 is fixed to the diagonal frame portion 26c of the radiator frame 26. The upper end of the frame 62 is fixed to the upper frame portion 26d of the radiator frame 26.

[0044] An upper hydraulic oil pipe 63 and a lower hydraulic oil pipe 64, which are hoses through which hydraulic oil (fluid) flows, are connected to the front end of the oil cooler 60. The upper hydraulic oil pipe 63 and the lower hydraulic oil pipe 64 are connected to a transmission (a device to be cooled, not shown) provided below the driver's unit 7. The upper hydraulic oil pipe 63 extends forward from its connection to the oil cooler 60 in the fore-and-aft direction of the aircraft, and passes through a through-hole 26f (FIG. 9) in the diagonal frame portion 26c of the radiator frame 26 to the outside of the intake space. The lower hydraulic oil pipe 64 extends forward from its connection to the oil cooler 60 in the fore-and-aft direction of the aircraft, and passes through a through-hole (not shown) in the front frame portion 26b of the radiator frame 26 to the outside of the intake space.

[0045] As shown in FIG. 10, when the frame 41 and the condenser 40 are detached from the radiator frame 26 (FIG. 8), the oil cooler 60 can be moved so as to protrude outward in the left-right direction of the aircraft from the radiator frame 26. That is, the oil cooler 60 can change state from the fixed state shown in FIG. 9 to the detached state shown in FIG. 10. To detach the oil cooler 60, the four mounting portions 60a are released to detach the oil cooler 60 from the frames 61 and 62. The upper hydraulic oil pipe 63 and the lower hydraulic oil pipe 64 are flexible, allowing the oil cooler 60 to be moved to any position. In particular, the oil cooler 60 can be swung forward of the aircraft while bending the upper hydraulic oil pipe 63 and the lower hydraulic oil pipe 64 so that the rear end (free end) of the oil cooler 60 protrudes outward in the left-right direction of the aircraft from the radiator frame 26 (FIG. 10).

[0046] [Intercooler (second 2 cooling device)] Intercooler 80 uses cooling air to cool the combustion air supplied to engine 16. As shown in FIG. 3, intercooler 80 is disposed between condenser 40 and dustproof case 22 with its lower portion overlapping condenser 40 when viewed in the left-right direction of the aircraft.

[0047] An upper portion of the intercooler 80 is detachably attached to the upper frame portion 26d of the radiator frame 26 by two front and rear upper mounting portions 80a using bolts. A lower portion of the intercooler 80 is detachably attached to the frame 41 by two front and rear lower mounting portions 80b using bolts.

[0048] At the upper end of the intercooler 80, a front air pipe 8 is provided, which is a hose through which combustion air (fluid) flows. 1、 and rear air tube 8 2 is The front air pipe 81 and the rear air pipe 82 are connected to the engine 16 (the device to be cooled). The front air pipe 81 and the rear air pipe 82 extend upward from the connection portion to the intercooler 80, then extend to the right, and pass through the through hole 26g in the upper frame-shaped portion 26d of the radiator frame 26 to extend outside the intake space.

[0049] The upper frame portion 26d of the radiator frame 26 is provided with a through hole 26g and a fixing member 27 that presses and fixes the front air pipe 81 and the rear air pipe 82. As shown in FIG. 12, the fixing member 27 is a plate-shaped member that is detachably attached to the upper frame portion 26d with bolts. A recess 27a formed in the lower end of the fixing member 27 and a recess 26h formed in the upper frame portion 26d are combined to form the through hole 26g. The front air pipe 81 and the rear air pipe 82, which are connected to the intercooler 80, pass through the through hole 26g. A gasket 27b is provided in the recess 27a of the fixing member 27. A gasket 26j is provided in the recess 26h of the upper frame portion 26d.

[0050] When the fixing member 27 is attached to the upper frame portion 26d of the radiator frame 26 (solid lines in FIG. 11, FIG. 12), the fixing member 27 presses the front air pipe 81 and the rear air pipe 82 against the upper end of the upper frame portion 26d, fixing the front air pipe 81 and the rear air pipe 82. When the fixing member 27 is detached from the upper frame portion 26d of the radiator frame 26 (phantom lines in FIG. 11, FIG. 13), the front air pipe 81 and the rear air pipe 82 are flexible, allowing the intercooler 80 to swing upward (phantom lines in FIG. 11). More specifically, as shown by the virtual lines in FIG. 11, the intercooler 80 can swing about an axis Y3 extending in the fore-and-aft direction of the aircraft (a direction intersecting the direction in which the vertical axis Y2, which is the swing axis of the hinge portion A, extends).

[0051] Other Embodiments (1) In this embodiment, as shown in Fig. 15, a sub-oil cooler 90 is disposed behind the oil cooler 60. The sub-oil cooler 90 cools the hydraulic oil of the transmission (a device to be cooled, not shown) in the same manner as the oil cooler 60. The sub-oil cooler 90 is disposed between the radiator 17 and the condenser 40.

[0052] The sub-oil cooler 90 is detachably attached to the frame 91 and the rear frame portion 26e of the radiator frame 26 by four mounting portions 90a at the front, rear, top and bottom using bolts. The frame 91 is a plate-shaped member extending in the vertical direction, and its upper end is fixed to the upper frame portion 26d of the radiator frame 26 and its lower end is fixed to the lower frame portion 26a of the radiator frame 26.

[0053] An upper hydraulic oil pipe 93 and a lower hydraulic oil pipe 94, which are hoses through which hydraulic oil (fluid) flows, are connected to the front end of the sub-oil cooler 90. The upper hydraulic oil pipe 93 and the lower hydraulic oil pipe 94 are connected to a transmission (not shown) provided below the driver's unit 7. The upper hydraulic oil pipe 93 and the lower hydraulic oil pipe 94 extend forward from their connection points to the sub-oil cooler 90 in the fore-and-aft direction of the aircraft.

[0054] In this embodiment, the upper hydraulic oil pipe 63 of the oil cooler 60 and the upper hydraulic oil pipe 93 of the sub-oil cooler 90 extend to the outside of the intake space through a penetration B provided in the diagonal frame portion 26c of the radiator frame 26. The lower hydraulic oil pipe 64 of the oil cooler 60 extends to the outside of the intake space through a penetration C provided in the front frame portion 26b of the radiator frame 26. The lower hydraulic oil pipe 94 of the sub-oil cooler 90 extends to the outside of the intake space through a penetration D provided in the front frame portion 26b of the radiator frame 26.

[0055] [Penetrating part B] 16 and 17, the through-hole B of the oblique frame portion 26c is composed of an opening 26k formed in the oblique frame portion 26c and a plate-like member 95. The plate-like member 95 is detachably attached to the oblique frame portion 26c with bolts.

[0056] Recesses 26m and 26n are formed at the end of oblique frame portion 26c facing opening 26k. Recesses 95a and 95b are formed at the end of plate-shaped member 95. Recess 26m and recess 95a are combined to form a through hole through which upper hydraulic oil pipe 63 of oil cooler 60 passes. Recess 26n and recess 95b are combined to form a through hole through which upper hydraulic oil pipe 93 of sub-oil cooler 90 passes. In oblique frame portion 26c, packing 26p is provided in recess 26m, and packing 26q is provided in recess 26n. In plate-shaped member 95, packing 95c is provided in recess 95a, and packing 95d is provided in recess 95b.

[0057] The upper hydraulic oil pipes 63 and 93 are fixed to the diagonal frame portion 26c by attaching the plate-like member 95 to the diagonal frame portion 26c. When the plate-like member 95 is removed from the diagonal frame portion 26c, the upper hydraulic oil pipes 63 and 93 are released from the diagonal frame portion 26c, and the upper hydraulic oil pipes 63 and 93 can be pulled out into the intake space through the openings 26k of the diagonal frame portion 26c. This increases the degree of freedom of movement of the oil cooler 60 and the sub-oil cooler 90 when releasing the fixation of the oil cooler 60 and the sub-oil cooler 90 for maintenance, making maintenance even easier.

[0058] As shown in Fig. 16, the upper hydraulic oil pipe 63 of the oil cooler 60 includes a flexible pipe 63a and a rigid pipe 63b. The tip of the rigid pipe 63b is inserted into the flexible pipe 63a, and the tip of the rigid pipe 63b extends from outside the intake space (forward of the diagonal frame portion 26c) to inside the intake space (rearward of the diagonal frame portion 26c). This ensures that the upper hydraulic oil pipe 63 is securely fixed to the diagonal frame portion 26c and prevents excessive load from being applied to the flexible pipe 63a of the upper hydraulic oil pipe 63 when the oil cooler 60 is swung (Fig. 10).

[0059] [Penetrating part C] 18 and 19, the through-hole C of the front frame portion 26b is composed of an opening 26r formed in the front frame portion 26b and a joint member 96. The joint member 96 is detachably attached to the front frame portion 26b with bolts.

[0060] The coupling member 96 includes a plate-shaped portion 96a and tubular portions 96b and 96c. As shown in Fig. 18, when the coupling member 96 is attached to the front frame portion 26b, the plate-shaped portion 96a is fixed to the front frame portion 26b with bolts in a position along the rear surface (the surface on the side of the intake space) of the front frame portion 26b. The tubular portion 96b protrudes into the intake space and is connected to the inner portion 64a of the lower hydraulic oil pipe 64. The tubular portion 96c protrudes outside the intake space and is connected to the outer portion 64b of the lower hydraulic oil pipe 64.

[0061] The lower hydraulic oil pipe 64 is fixed to the front frame portion 26b by attaching the coupling member 96 to the front frame portion 26b. When the coupling member 96 is removed from the front frame portion 26b, the lower hydraulic oil pipe 64 is released from the front frame portion 26b, and the lower hydraulic oil pipe 64 can be pulled out into the intake space through the opening 26r of the front frame portion 26b. This increases the degree of freedom of movement of the oil cooler 60 when releasing the oil cooler 60 for maintenance, making maintenance even easier.

[0062] The configuration of the through-hole D is the same as that of the through-hole C, and therefore a description thereof will be omitted.

[0063] (2) In the above embodiment, an example was described in which the condenser 40 is supported on a frame 41 that is swingable and detachable from the radiator frame 26. However, it is also possible to have other cooling devices (e.g., an oil cooler, an intercooler, etc.) supported on a frame that is swingable and detachable from the radiator frame 26.

[0064] (3) The frame 41 may be supported on the radiator frame 26 via two or more hinge portions.

[0065] (4) The power unit 15 of the combine may be equipped with three cooling devices: a condenser 40, an oil cooler 60, and an intercooler 80; or may be equipped with four cooling devices including a secondary oil cooler 90; or may be equipped with five or more cooling devices.

[0066] (5) The transmission of the combine (work vehicle) may be equipped with an HST (hydrostatic continuously variable transmission), and the oil cooler 60 (and / or the sub-oil cooler 90) may be configured to cool the hydraulic oil of the HST. [Industrial Applicability]

[0067] The present invention can be applied to harvesters such as normal combine harvesters and head-feeding combine harvesters, as well as agricultural work vehicles such as tractors and rice transplanters, and can be applied not only to agricultural work vehicles but also to work vehicles such as construction machinery. [Explanation of symbols]

[0068] 17: Radiator 22: Dustproof case (dustproof part) 40: Capacitor ( cooling device, 1st cooling device) 60: Oil cooler ( cooling device, No. 3 cooling device) 80: Intercooler ( cooling device, No. 2 cooling device) Y 2 :Axis core

Claims

1. A radiator provided on a running machine body; A dustproof unit that is located outside the traveling body with respect to the radiator and removes dust from the wind sent to the radiator; a cooling device provided between the radiator and the dustproof portion, The cooling device is configured to be switchable between a use state in which the cooling device is close to the radiator and a maintenance state in which the cooling device is spaced apart from the radiator.

2. A work vehicle as described in Claim 1, wherein the dustproof section is configured to be switchable between a usage state in close proximity to the cooling device and a maintenance state away from the cooling device.

3. A work vehicle as described in Claim 2, wherein the dustproof part can be switched between the usage state and the maintenance state by moving in a predetermined direction.

4. The cooling device is switched between the use state and the maintenance state with a portion of the cooling device supported on the running body, The work vehicle according to claim 2 or 3, wherein the dustproof section is switched between the use state and the maintenance state with a portion of the dustproof section being supported by the traveling machine body.

5. A work vehicle as described in claim 1, wherein the cooling device can be switched between the usage state and the maintenance state by swinging.

6. A work vehicle as described in Claim 5, wherein the cooling device can be switched between the usage state and the maintenance state by oscillating around an oscillating axis extending in the vertical direction of the running body.

7. A work vehicle as described in Claim 1, wherein the cooling device is fixed to the running body in the usage state.

8. A first cooling device which is the cooling device; a second cooling device that is the cooling device and is provided between the first cooling device and the dustproof unit, the first cooling device is switched from the use state to the maintenance state by moving in a first direction; The work vehicle according to claim 1 , wherein the second cooling device is switched from the use state to the maintenance state by moving in a second direction different from the first direction.

9. A work vehicle as described in Claim 8, which is equipped with a third cooling device as the cooling device, which is arranged between the radiator and the first cooling device.

10. A work vehicle as described in Claim 9, wherein the third cooling device is configured to be able to swing in a horizontal plane.

11. A work vehicle as described in claim 9 or 10, wherein the third cooling device overlaps with at least a portion of the first cooling device and at least a portion of the second cooling device when viewed from the left and right of the running body.

Images