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 section using ventilation from a cooling fan. An oil cooler for cooling hydraulic oil is fixedly attached to the engine bonnet, located at a location where the outside air passes through. The engine bonnet is configured to be substantially box-shaped to cover the entire driving unit, with a driver's seat supported on the upper part. When performing maintenance work on the driving unit, the entire engine bonnet is rotated around a longitudinal axis to open the upper part of the driving unit. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2011-244785 A Summary of the Invention [Problem to be solved by the invention]

[0004] In the above conventional configuration, the cooling device (oil cooler, etc.) is fixedly attached to the engine bonnet. Therefore, when performing maintenance work such as removing dust or repairing or inspecting the cooling device, it is necessary to rotate the engine bonnet to expose the cooling device to the outside. Also, in order to clean the front and back surfaces of the cooling device, the cooling device must be removed from the engine bonnet, which is a hassle. Incidentally, when the cooling device is fixedly attached to the engine bonnet, it is firmly attached by connecting it at multiple points (at least four or more), so the work of removing the cooling device from the engine bonnet is a hassle.

[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 a work vehicle for achieving the above-mentioned objective comprises a radiator, a fan that blows air to the radiator, a radiator frame that supports the radiator, a dustproof section that is supported on the radiator frame in a state that allows it to swing open and close and that removes dust from the air sent to the radiator, a first cooling device that is positioned between the radiator and the dustproof section, and a frame that supports the first cooling device, wherein the frame is supported on the radiator frame in a state that allows it to swing open and close and is detachable from the radiator frame at the hinge section.

[0007] According to the above-mentioned characteristic configuration, it is possible to move the first cooling device by swinging the frame, and also possible to move the first cooling device by detaching the frame from the radiator frame, which makes it easy to perform maintenance work on the first cooling device.

[0008] In the present invention, it is preferable that the frame is supported on the radiator frame via one of the hinge portions.

[0009] According to the above characteristic configuration, the frame can be easily detached from the radiator frame, which makes it easier to perform maintenance work on the first cooling device.

[0010] In the present invention, it is preferable that a hose is provided that is connected to the first cooling device, the hose extending from the first cooling device toward the hinge portion along the extension direction of the frame and passing near the hinge portion.

[0011] According to the above-mentioned characteristic configuration, since the hose is passed near the hinge portion, the hose is unlikely to get in the way when the frame is swung. Also, when the frame is detached from the radiator frame, the hose and the frame can be moved together, which makes it possible to prevent excessive load from being applied to the hose.

[0012] In the present invention, it is preferable to include a second cooling device arranged between the radiator and the first cooling device so as to overlap with the frame when viewed in the left-right direction of the aircraft body.

[0013] According to the above-mentioned characteristic configuration, the frame and the first cooling device can be swung or detached to facilitate maintenance of the second cooling device. In addition, multiple cooling devices can be arranged in a limited space, improving space efficiency.

[0014] In the present invention, it is preferable that, in a state in which the frame is detached from the radiator frame, the second cooling device is movable so as to protrude outward in the left-right direction of the aircraft beyond the radiator frame.

[0015] According to the above characteristic configuration, the first cooling device can be detached from the radiator frame for easy maintenance, and the second cooling device can be protruded from the radiator frame for easy maintenance. In other words, maintenance work for the first cooling device and the second cooling device can be easily performed.

[0016] In the present invention, it is preferable to include a third cooling device arranged between the first cooling device and the dust prevention section so as to overlap with the first cooling device when viewed in the left-right direction of the aircraft body.

[0017] According to the above characteristic configuration, a plurality of cooling devices can be arranged in a limited space, thereby improving space efficiency.

[0018] In the present invention, it is preferable that the third cooling device be capable of swinging about an axis extending in a direction intersecting an extension direction of the swing axis of the hinge portion.

[0019] According to the above characteristic configuration, the third cooling device swings in a direction that does not impede the swinging of the first cooling device, so that maintenance of both the first cooling device and the third cooling device can be easily performed.

[0020] In the present invention, the radiator frame has a through hole through which a secondary hose connected to the third cooling device passes, and a fixing member that presses and fixes the secondary hose, and it is preferable that the third cooling device is in a swingable state when the fixing member is removed from the radiator frame.

[0021] According to the above characteristic configuration, it is possible to realize fixing of the secondary hose and swinging of the third cooling device with a simple configuration. [Brief description of the drawings]

[0022] [Figure 1] FIG. [Diagram 2] FIG. [Diagram 3] FIG. 4 is a right side view showing the arrangement of a condenser, an oil cooler, and an intercooler. [Figure 4] FIG. [Diagram 5] FIG. [Figure 6] FIG. 4 is a plan view showing a state in which the capacitor and the frame are fixed. [Figure 7] FIG. 13 is a plan view showing a state in which the capacitor and the frame are swung. [Figure 8] 13 is a plan view showing a state in which the condenser and the frame have been detached from the radiator frame. FIG. [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] FIG. 2 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). [Figure 12] A right side view showing the state in which the fixing member is attached to the upper frame-shaped portion. [Figure 13] 13 is a right side view showing the state in which the fixing member has been removed from the upper frame-shaped portion. FIG. [Figure 14] 14 is a cross-sectional view taken along the line XIV-XIV of 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 through-portion of an upper hydraulic oil pipe. [Figure 17] FIG. 4 is a rear view showing the shape of a penetration portion of an upper hydraulic oil pipe. [Figure 18] FIG. 4 is a vertical cross-sectional view showing the shape of a through-portion of a lower hydraulic oil pipe. [Figure 19] FIG. 4 is a rear view showing the shape of a penetration portion of a lower hydraulic oil pipe. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[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] A normal type combine is shown in Figures 1 and 2. The traveling body of this combine is equipped with a machine frame 1 and a crawler traveling device 2. A harvesting section 3 that harvests planted culms in a field is provided in front of the traveling body. The harvesting section 3 is equipped with a raking reel 4 that raks 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 up, and sends them out rearward.

[0026] A 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 grains obtained by threshing is provided behind the driving unit 7. A threshing device 10 for threshing the entire culms of the harvested culms is provided side by side with the grain tank 9. A feeder 11 for transporting the entire culms of the harvested culms toward 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 Figures 1, 2, 4, and 5, the driving unit 15 is equipped with an engine 16, a radiator 17 for cooling the engine, a cooling fan 18 (an example of a fan) that draws in outside air and blows it into the radiator 17 for cooling, and a fan shroud 19 that guides outside air from the radiator 17 to the cooling fan 18.

[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 on the outer side of the engine 16. The cooling fan 18 is provided in the engine room 20 on the inner side of the radiator 17.

[0029] The lateral outer side of the engine room 20 is covered by a dustproof case 22 (one example of a dustproof part) located on the outer side of the aircraft with respect to the radiator 17. The lateral outer surface of the dustproof case 22 is provided with a dustproof net 23 (FIG. 1) that allows ventilation and prevents dust from passing through. That is, the dustproof case 22 removes dust from the wind sent 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 close 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) that covers the outside of the engine room 20 and an open position (phantom line in FIG. 2) that exposes the outside of the engine room 20.

[0031] The cooling fan 18 draws in outside air through the dustproof case 22 in the closed position 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 efficiently through the radiator 17. The fan shroud 19 is provided across the cooling fan 18 and the radiator 17 in a state in which it surrounds the outer periphery of the air 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 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 the 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 frame-shaped portion 26a at the bottom, a front frame-shaped portion 26b at the front bottom, an oblique frame-shaped portion 26c at the front top, an upper frame-shaped portion 26d at the top, and a rear frame-shaped portion 26e at the rear, 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 (an example of a first cooling device), an oil cooler 60 (an example of a second cooling device), and an intercooler 80 (an example of a third cooling device) are arranged in the space (intake space) between the radiator 17 and the dustproof case 22.

[0034] [Condenser (first cooling device)] The condenser 40 cools the refrigerant of an air conditioner (not shown) arranged in the driving unit 7, and condenses the refrigerant. A frame 41 is provided to support an upper end portion of the condenser 40. The condenser 40 is supported by the frame 41 via front and rear support portions 41a. The lower end portion 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 along the front-rear 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 Figs. 3 to 8. The front end of the frame 41 is supported by the front frame portion 26b of the radiator frame 26 via a bracket 42. In more detail, 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 frame 41 is secured to the front frame portion 26b by the bolt 42a. The front end of the frame 41 is attached to the rear end of the bracket 42 in a state in which the frame 41 can swing about a 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 on 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 bolts 43a. The rear end of the bracket 43 is attached to the rear frame portion 26e of the radiator frame 26 by bolts 43b and the like.

[0038] The swing of the frame 41 and the condenser 40 will be described. The frame 41 and the condenser 40 can swing forward around the vertical axis Y2 from the fixed state shown in Fig. 3 and Fig. 6 to the swing state shown in Fig. 7. For the 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 part 40a is released, and the lower end of the condenser 40 is detached from the radiator frame 26 (lower frame part 26a). Then, the frame 41 and the condenser 40 can be swung forward around the vertical axis Y2. The bolt 42a and the bracket 42 form a hinge part A that realizes the swinging of the frame 41 around the vertical axis Y2.

[0039] The detachment of the frame 41 and the condenser 40 will be described. The frame 41 and the condenser 40 can change from the fixed state shown in Fig. 3 and Fig. 6 to the detached state shown in Fig. 8. When detaching, first, the fixation by the bolt 43a is released in the same manner as the above-mentioned swinging to detach the rear end of the frame 41 from the bracket 43, and the fixation by the support part 40a is released to detach the lower end of the condenser 40 from the radiator frame 26 (lower frame part 26a). Then, the fixation of the bracket 42 to the radiator frame 26 (front frame part 26b) by the three bolts 42b is released. Then, as shown in Fig. 8, the condenser 40, the frame 41, and the bracket 42 can be detached from the radiator frame 26 in an integrated state.

[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 the connection part to the condenser 40 along the longitudinal direction of the machine body, passes near the bolt 42a, and extends outside the intake space through a through hole (not shown) of the front frame part 26b of the radiator frame 26. That is, the upper refrigerant pipe 44 extends toward the hinge part A along the extension direction of the frame 41 and passes near the hinge part. The lower refrigerant pipe 45 extends upward from the connection part to the condenser 40, extends forward along the longitudinal direction of the machine body, passes near the bolt 42a in a plan view, and extends outside the intake space through a through hole (not shown) of the front frame part 26b of the radiator frame 26. 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] In a state in which 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, and the frame 41 and the condenser 40 can be moved to any position, facilitating maintenance of the condenser 40. In addition, the upper refrigerant pipe 44 and the lower refrigerant pipe 45 can be pulled out from a through hole (not shown) in the front frame-shaped portion 26b of the radiator frame 26 to expand the movable range of the frame 41 and the condenser 40.

[0042] [Oil cooler (second 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.

[0043] The oil cooler 60 is detachably attached to frames 61, 62 by four mounting parts 60a at the front, rear, top and bottom using bolts. The frames 61, 62 are plate-shaped members extending in the vertical direction, and their lower ends are fixed to the lower frame part 26a of the radiator frame 26. The upper end of the frame 61 is fixed to the diagonal frame part 26c of the radiator frame 26. The upper end of the frame 62 is fixed to the upper frame part 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 driving unit 7. The upper hydraulic oil pipe 63 extends forward from a connection portion to the oil cooler 60 along the longitudinal direction of the aircraft, and extends outside the intake space through a through hole 26f (FIG. 9) of the diagonal frame portion 26c of the radiator frame 26. The lower hydraulic oil pipe 64 extends forward from a connection portion to the oil cooler 60 along the longitudinal direction of the aircraft, and extends outside the intake space through a through hole (not shown) of the front frame portion 26b of the radiator frame 26.

[0045] As shown in FIG. 10, in a state where the frame 41 and the condenser 40 are detached from the radiator frame 26 (FIG. 8), the oil cooler 60 can move 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. When detaching, the oil cooler 60 is detached from the frames 61 and 62 by releasing the fixation by the four mounting parts 60a. The upper hydraulic oil pipe 63 and the lower hydraulic oil pipe 64 are flexible, and the oil cooler 60 can 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 side) of the oil cooler 60 protrudes outward in the left-right direction of the aircraft from the radiator frame 26 (FIG. 10).

[0046] [Intercooler (third cooling device)] Intercooler 80 utilizes 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 a lower portion thereof overlapping with 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 upper mounting portions 80a at the front and rear using bolts. A lower portion of the intercooler 80 is detachably attached to the frame 41 by two lower mounting portions 80b at the front and rear using bolts.

[0048] A front air pipe 81 (an example of a secondary hose) and a rear air pipe 82 (an example of a secondary hose), which are hoses through which combustion air (fluid) flows, are connected to the upper end of the intercooler 80. The front air pipe 81 and the rear air pipe 82 are connected to the engine 16 (a 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 extend outside the intake space through the through hole 26g of the upper frame-shaped portion 26d of the radiator frame 26.

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

[0050] In a state where the fixing member 27 is attached to the upper frame portion 26d of the radiator frame 26 (solid line 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 to fix the front air pipe 81 and the rear air pipe 82. In a state where the fixing member 27 is removed from the upper frame portion 26d of the radiator frame 26 (phantom line in FIG. 11, FIG. 13), the front air pipe 81 and the rear air pipe 82 are flexible, so that the intercooler 80 can swing upward (phantom line in FIG. 11). More specifically, as shown by the virtual line in FIG. 11, the intercooler 80 can swing around 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 part 26e of the radiator frame 26 by four mounting parts 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 part 26d of the radiator frame 26 and its lower end is fixed to the lower frame part 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 connections 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-shaped portion 26c is composed of an opening 26k formed in the oblique frame-shaped portion 26c and a plate-shaped member 95. The plate-shaped member 95 is detachably attached to the oblique frame-shaped portion 26c by a bolt.

[0056] The oblique frame portion 26c has recesses 26m and 26n at an end thereof facing the opening 26k. The plate-shaped member 95 has recesses 95a and 95b at an end thereof. The recesses 26m and 95a are combined to form a through hole through which the upper hydraulic oil pipe 63 of the 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-shaped 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 of the radiator frame 26. 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 to the intake space through the openings 26k of the diagonal frame portion 26c. This increases the 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 the outside of the intake space (front side of the diagonal frame-shaped portion 26c) to the inside of the intake space (rear side of the diagonal frame-shaped portion 26c). This ensures that the upper hydraulic oil pipe 63 is fixed to the diagonal frame-shaped 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 a bolt.

[0060] The joint member 96 includes a plate-shaped portion 96a and tubular portions 96b and 96c. As shown in Fig. 18, when the joint member 96 is attached to the front frame portion 26b, the plate-shaped portion 96a is fixed to the front frame portion 26b by 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 out of 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 joint member 96 to the front frame portion 26b of the radiator frame 26. When the joint 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 freedom of movement of the oil cooler 60 when releasing the fixation of the oil cooler 60 for maintenance, making maintenance even easier.

[0062] The configuration of the through-hole D is similar to 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 combine's power unit 15 may be provided with three cooling devices: a condenser 40, an oil cooler 60, and an intercooler 80, or it may be provided with four cooling devices including a sub-oil cooler 90, or it may be provided 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 machines. [Explanation of symbols]

[0068] 17: Radiator 18: Cooling fan (fan) 22: Dustproof case (dustproof part) 26: Radiator frame 26g:Through hole 27: Fixing member 40: Condenser (first cooling device) 41: Frame 60: Oil cooler (secondary cooling device) 80: Intercooler (third cooling device) A: Hinge part Y3: Axial center

Claims

[Claim 1] A radiator, A fan that blows air to the radiator; a radiator frame supporting the radiator; a dustproof part for removing dust from the wind blown to the radiator; A cooling device disposed between the radiator and the dustproof portion; A work vehicle comprising: a frame supporting the cooling device.

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