JP7239442B2 - work vehicle - Google Patents

Description

The present invention relates to work vehicles.

The combine disclosed in Patent Document 1 is configured to cool the radiator by sucking outside air through a dust-proof case provided with a porous air intake portion by a cooling fan. An oil cooler that cools the hydraulic oil is fixedly attached to the engine bonnet so as to be positioned at a point through which outside air is drawn. The engine bonnet is provided in a substantially box-like shape that covers the entire driving unit, and has a configuration in which the driver's seat is supported on the top. When performing maintenance work on the driving portion, the entire engine bonnet is rotated around the front-rear axis to open the upper portion of the driving portion.

JP 2011-244785 A

In the conventional configuration described above, the cooling device (such as an oil cooler) is attached to the engine bonnet in a fixed state. Therefore, when carrying out maintenance work such as removing dust from the cooling device or repairing and inspecting the cooling device, it is necessary to rotate the engine bonnet to expose the cooling device to the outside. In addition, 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 disadvantage in that it is troublesome and time-consuming. Incidentally, when the cooling device is attached to the engine bonnet in a fixed state, the cooling device must be firmly attached by being connected at a number of at least four locations, so the work of removing the cooling device from the engine bonnet is troublesome. .

SUMMARY OF THE INVENTION It is an object of the present invention to provide a work vehicle that facilitates maintenance work for a cooling device.

A working vehicle for achieving the above object is characterized by a radiator, a fan for blowing air to the radiator, a radiator frame for supporting the radiator, and a a dust-proof part that removes dust from the wind sent to the radiator; a first cooling device that is arranged between the radiator and the dust-proof part; and a frame that supports the first cooling device, wherein the frame is 2, it is swingably supported by the radiator frame through a hinge portion, and is attachable to and detachable from the radiator frame at the hinge portion.

According to the above characteristic configuration, it is possible to move the first cooling device by swinging the frame, and to move the first cooling device by detaching the frame from the radiator frame. Therefore, maintenance work for the first cooling device can be easily performed.

In the present invention, it is preferable that the frame is supported by the radiator frame through only one hinge portion.

According to the above characteristic configuration, the frame can be easily detached from the radiator frame. Therefore, maintenance work for the first cooling device can be performed more easily.

In the present invention, a hose connected to the first cooling device is provided, the hose extends from the first cooling device toward the hinge portion along the direction in which the frame extends, and extends in the vicinity of the hinge portion. It is preferable that it is passed through.

According to the above characteristic configuration, since the hose is passed near the hinge portion, the hose is less likely to be an obstacle when swinging the frame. Also, when the frame is detached from the radiator frame, the hose and the frame can be moved integrally, and excessive load on the hose can be suppressed.

In the present invention, it is preferable to provide a second cooling device arranged between the radiator and the first cooling device so as to overlap the frame when viewed in the lateral direction of the aircraft body.

According to the above characteristic configuration, maintenance of the second cooling device can be facilitated by swinging or separating the frame and the first cooling device. In addition, a plurality of cooling devices can be arranged in a limited space, and space efficiency can be improved.

In the present invention, it is preferable that the second cooling device is movable so as to protrude outward from the radiator frame in the left-right direction of the vehicle body when the frame is detached from the radiator frame.

According to the above characteristic configuration, the first cooling device can be detached from the radiator frame to facilitate maintenance, and the second cooling device can be protruded from the radiator frame for maintenance. That is, maintenance work for the first cooling device and the second cooling device can be easily performed.

In the present invention, it is preferable to provide a third cooling device arranged between the first cooling device and the dust-proof part in a state overlapping with the first cooling device when viewed in the lateral direction of the aircraft body.

According to the above characteristic configuration, a plurality of cooling devices can be arranged in a limited space, and space efficiency can be improved.

In the present invention, it is preferable that the third cooling device is capable of swinging around an axis extending in a direction intersecting the extending direction of the swing axis of the hinge portion.

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

In the present invention, the radiator frame includes a through hole through which a sub-hose connected to the third cooling device passes, and a fixing member that presses and fixes the sub-hose. It is preferable that the third cooling device is in a swingable state when removed from the cooling device.

According to the above characteristic configuration, it is possible to fix the sub hose and swing the third cooling device with a simple configuration.

It is the whole combine side view. It is the whole combine top view. It is a right side view showing arrangement of a condenser, an oil cooler, and an intercooler. FIG. 4 is a plan view of a driving portion; It is a rear view of a motor part. FIG. 4 is a plan view showing a state in which a capacitor and a frame are fixed; FIG. 4 is a plan view showing a state in which the capacitor and the frame are rocked; FIG. 4 is a plan view showing a state in which the capacitor and the frame are detached from the radiator frame; FIG. 4 is a plan view showing a state in which the oil cooler is fixed; FIG. 4 is a plan view showing a state in which the oil cooler is swung; It is a rear view showing a state where the intercooler is fixed (solid line) and a state where the intercooler is swung (virtual line). It is a right view which shows the state by which the fixing member was attached to the upper frame-shaped part. It is a right view which shows the state from which the fixing member was removed from the upper frame-shaped part. 13 is a cross-sectional view taken along line XIV-XIV of FIG. 12; FIG. It is a right view which shows arrangement|positioning of a sub oil cooler. FIG. 4 is a vertical cross-sectional view showing the shape of a penetrating portion of an upper hydraulic oil pipe; FIG. 5 is a rear view showing the shape of the penetrating portion of the upper hydraulic oil pipe; FIG. 4 is a vertical cross-sectional view showing the shape of a penetrating portion of a lower hydraulic oil pipe; FIG. 4 is a rear view showing the shape of the penetrating portion of the lower hydraulic oil pipe;

DESCRIPTION OF THE PREFERRED EMBODIMENTS A case where an embodiment of a work vehicle according to the present invention is applied to a common combine harvester as an example of a work vehicle will be described below with reference to the drawings.

In this embodiment, the direction indicated by the symbol (F) is the front side of the aircraft, the direction indicated by the symbol (B) is the rear side 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 left side of the aircraft. right side of the fuselage.

〔overall structure〕
1 and 2 show a conventional combine harvester. A traveling machine body of this combine is provided with a machine body frame 1 and a crawler traveling device 2. - 特許庁A harvesting section 3 for harvesting planted grain culms in a field is provided in front of the traveling machine body. The harvesting unit 3 includes a raking reel 4 for raking the planted grain culms, a cutting blade 5 for cutting the planted grain culms, and an auger for laterally feeding the harvested grain culms in the cutting width direction, gathering them together, and sending them backward. 6 and are provided.

An operating section 7 is provided behind the harvesting section 3 . The operating part 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 all the culms of harvested grain culms is provided side by side with the grain tank 9 . A feeder 11 is provided across the harvesting unit 3 and the threshing device 10 to convey all the culms of harvested grain culms toward the threshing device 10 . The operation section 7 includes a driver's seat 12 and an operation panel 13 having various operation tools. A driving unit 15 is provided below the driving unit 7 .

[Motor part]
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 (an example of a fan) that draws in outside air and blows it to the radiator 17 to cool it. ), a fan shroud 19 for guiding the outside air from the radiator 17 to the cooling fan 18, and the like.

As shown in FIG. 2, an engine room bonnet 21 that covers the upper side of the engine 16 and forms an engine room 20 is provided. The engine room bonnet 21 supports the driver's seat 12 from below and opens laterally outward. The radiator 17 is provided laterally outside the engine 16 in the engine room 20 . The cooling fan 18 is provided laterally inside the radiator 17 in the engine room 20 .

The lateral outer side of the engine room 20 is covered with a dustproof case 22 (an example of a dustproof portion) located on the outer side of the radiator 17 . A dust-proof net 23 (FIG. 1) is provided on the lateral outer surface of the dust-proof case 22 to allow ventilation and block the passage of dust. That is, the dustproof case 22 removes dust from the wind sent to the radiator 17 .

The dustproof case 22 is supported by the radiator frame 26 so as to be swingable and openable around the vertical axis Y1. The dust-proof case 22 swings about the vertical axis Y1 to take a closed posture (solid line in FIG. 2) covering the engine room 20 outside the fuselage and an open posture (shown in FIG. 2) opening the engine room 20 outside the fuselage. virtual line).

The cooling fan 18 cools the radiator 17 by drawing outside air through the dustproof case 22 in the closed posture. 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 as to efficiently pass through the radiator 17 . The fan shroud 19 is provided so as to cover the cooling fan 18 and the radiator 17 while surrounding the outer periphery of the intake space between the cooling fan 18 and the radiator 17 .

Radiator 17 is supported by radiator frame 26 . The radiator frame 26 is formed in a frame-like shape along the outer periphery of the radiator 17 so as to cover the air intake space between the radiator 17 and the dustproof case 22 and guide the outside air passing through the dustproof case 22 to the radiator 17 . there is That is, as shown in FIG. 3 and the like, the radiator frame 26 includes a lower frame-shaped portion 26a, a front lower front frame-shaped portion 26b, an upper front oblique frame-shaped portion 26c, an upper upper frame-shaped portion 26d, and a rear portion. It has a rear frame-shaped portion 26e and is provided along the outer periphery of the radiator 17. As shown in FIG. A bottom portion of the radiator frame 26 is supported by the body frame 1 .

In the space (air intake space) between the radiator 17 and the dustproof case 22, a condenser 40 (an example of a first cooling device), an oil cooler 60 (an example of a second cooling device), an intercooler 80 (a third cooling device) An example of a device) and are arranged.

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

The frame 41 is a plate-shaped member extending along the longitudinal direction of the aircraft body. The frame 41 is swingably supported by the radiator frame 26 via one hinge portion A, and is attachable to and detachable from the radiator frame 26 at the hinge portion A. As shown in FIG.

The frame 41 will be further described with reference to FIGS. 3-8. A front end portion of the frame 41 is supported by the front frame portion 26 b of the radiator frame 26 via a bracket 42 . Specifically, the bolt 42 a is inserted through a through hole (not shown) at the front end of the frame 41 and a through hole (not shown) at the rear end of the bracket 42 . The front end portion of the frame 41 is attached to the rear end portion of the bracket 42 with the bolt 42a such that the frame 41 can swing relative to the bracket 42 about the vertical axis Y2. The front end portion of the bracket 42 is detachably attached to the front frame portion 26b of the radiator frame 26 with three bolts 42b.

A rear end portion of the frame 41 is supported by a rear frame portion 26 e of the radiator frame 26 via a bracket 43 . Specifically, the rear end of the frame 41 is detachably attached to the front end of the bracket 43 with a bolt 43a. The rear end portion of the bracket 43 is attached to the rear frame portion 26e of the radiator frame 26 with bolts 43b and the like.

Swinging of the frame 41 and the capacitor 40 will be described. The frame 41 and the capacitor 40 are capable of swinging about the vertical axis Y2 forward from the fixed state shown in FIGS. 3 and 6 to the swinging state shown in FIG. When swinging, first, the fixing by the bolt 43 a is released, and the rear end portion of the frame 41 is separated from the bracket 43 . Then, the fixing by the support portion 40a is released, and the lower end portion of the capacitor 40 is separated from the radiator frame 26 (lower frame portion 26a). Then, the frame 41 and the capacitor 40 can be swung forward about the vertical axis Y2. The bolt 42a and the bracket 42 constitute a hinge portion A that allows the frame 41 to swing around the vertical axis Y2.

Detachment of the frame 41 and the capacitor 40 will be described. The frame 41 and the capacitor 40 can be changed from the fixed state shown in FIGS. 3 and 6 to the detached state shown in FIG. At the time of detachment, first, similar to the rocking motion described above, the fixing by the bolt 43a is released to detach the rear end of the frame 41 from the bracket 43, and the lower end of the capacitor 40 is released by releasing the fixation by the support portion 40a. is detached from the radiator frame 26 (lower frame-shaped portion 26a). Then, the fixing of the bracket 42 to the radiator frame 26 (the front frame portion 26b) by the three bolts 42b is released. Then, as shown in FIG. 8, the capacitor 40, the frame 41, and the bracket 42 can be detached from the radiator frame 26 in an integrated state.

An upper refrigerant pipe 44 and a lower refrigerant pipe 45, which are hoses through which 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 (device to be cooled, not shown) provided in the operating section 7 . The upper refrigerant pipe 44 extends forward along the longitudinal direction of the fuselage from the connecting portion to the condenser 40, passes near the bolt 42a, passes through a through hole (not shown) in the front frame portion 26b of the radiator frame 26, and inhales air. extending outside the working space. That is, the upper refrigerant pipe 44 extends toward the hinge portion A along the extending direction of the frame 41 and passes through the vicinity of the hinge portion. The lower refrigerant pipe 45 extends upward from the connecting portion to the condenser 40, extends forward along the longitudinal direction of the fuselage, passes near the bolt 42a in a plan view, and passes through a through hole ( (not shown) to the outside of the air 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.

When the frame 41 and the condenser 40 are separated 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 . Since 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 arbitrary positions, maintenance of the condenser 40 can be easily performed. Further, the upper refrigerant pipe 44 and the lower refrigerant pipe 45 can be pulled out from through holes (not shown) of the front frame portion 26b of the radiator frame 26 to expand the movable range of the frame 41 and the condenser 40. FIG.

[Oil cooler (second cooling device)]
The oil cooler 60 cools hydraulic oil for a transmission (not shown). As shown in FIG. 3, the oil cooler 60 is arranged between the radiator 17 and the condenser 40 such that the lower portion of the oil cooler 60 overlaps the frame 41 when viewed in the lateral direction of the vehicle body.

The oil cooler 60 is detachably attached to the frames 61 and 62 by means of four attachment portions 60a, front, back, 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-shaped portion 26 a of the radiator frame 26 . The upper end of the frame 61 is fixed to the slanted frame portion 26 c of the radiator frame 26 . The upper end of the frame 62 is fixed to the upper frame portion 26 d of the radiator frame 26 .

A front end portion of the oil cooler 60 is connected to an upper hydraulic oil pipe 63 and a lower hydraulic oil pipe 64, which are hoses through which hydraulic oil (fluid) flows. The upper hydraulic oil pipe 63 and the lower hydraulic oil pipe 64 are connected to a transmission (device to be cooled, not shown) provided below the operating section 7 . The upper hydraulic oil pipe 63 extends forward along the longitudinal direction of the fuselage from the connecting portion to the oil cooler 60, passes through the through hole 26f (FIG. 9) of the slanted frame portion 26c of the radiator frame 26, and exits the air intake space. extended. The lower hydraulic oil pipe 64 extends forward along the longitudinal direction of the fuselage from a connecting portion to the oil cooler 60, passes through a through hole (not shown) in the front frame portion 26b of the radiator frame 26, and extends out of the air intake space. ing.

As shown in FIG. 10, the oil cooler 60 is movable so as to protrude outward from the radiator frame 26 in the lateral direction of the fuselage when the frame 41 and the condenser 40 are detached from the radiator frame 26 (FIG. 8). is. That is, the oil cooler 60 can change its state from the fixed state shown in FIG. 9 to the detached state shown in FIG. When detaching, the oil cooler 60 is detached from the frames 61 and 62 by releasing the fixing by the four mounting portions 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 is bent while bending the upper hydraulic oil pipe 63 and the lower hydraulic oil pipe 64 so that the rear end portion (free end side) of the oil cooler 60 protrudes further outward in the lateral direction of the machine body than the radiator frame 26 (FIG. 10). It can swing forward.

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

The 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 attachment portions 80a using bolts. The lower portion of the intercooler 80 is detachably attached to the frame 41 by two front and rear lower attachment portions 80b using bolts.

A front air pipe 81 (an example of a sub hose) and a rear air pipe 82 (an example of a sub 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 (equipment to be cooled). The front air pipe 81 and the rear air pipe 82 extend upward from the connecting portion to the intercooler 80, then extend rightward, pass through the through hole 26g of the upper frame portion 26d of the radiator frame 26, and pass through the air intake space. extends to

The upper frame-shaped portion 26d of the radiator frame 26 has 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. As shown in FIG. 12, the fixing member 27 is a plate-like member and 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-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 concave portion 27a of the fixing member 27. As shown in FIG. A packing 26j is provided in the concave portion 26h of the upper frame-shaped portion 26d.

When the fixing member 27 is attached to the upper frame-shaped portion 26d of the radiator frame 26 (solid line in FIG. 11, FIG. 12), the fixing member 27 connects the front air pipe 81 and the rear air pipe 82 to the upper end of the upper frame-shaped portion 26d. The front air pipe 81 and the rear air pipe 82 are fixed by pressing against the part. When 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 flexibility of the front air pipe 81 and the rear air pipe 82 allows the intercooler 80 becomes capable of swinging upward (virtual line in FIG. 11). Specifically, as shown by a phantom line in FIG. 11, the intercooler 80 has an axis Y3 extending in the longitudinal direction of the fuselage (a direction intersecting with the direction in which the vertical axis Y2, which is the swing axis of the hinge portion A) extends. It can swing around.

[Other embodiments]
(1) In this embodiment, as shown in FIG. 15, a secondary oil cooler 90 is arranged behind the oil cooler 60 . The secondary oil cooler 90 cools hydraulic oil for a transmission (a device to be cooled, not shown) in the same manner as the oil cooler 60 . A secondary oil cooler 90 is arranged between the radiator 17 and the condenser 40 .

The sub oil cooler 90 is detachably attached to the frame 91 and the rear frame portion 26e of the radiator frame 26 by means of four attachment portions 90a using bolts. The frame 91 is a plate-shaped member extending in the vertical direction. ing.

A front end portion of the secondary oil cooler 90 is connected to an upper hydraulic oil pipe 93 and a lower hydraulic oil pipe 94, which are hoses through which hydraulic oil (fluid) flows. The upper hydraulic oil pipe 93 and the lower hydraulic oil pipe 94 are connected to a transmission (not shown) provided below the operation section 7 . The upper hydraulic oil pipe 93 and the lower hydraulic oil pipe 94 extend forward along the longitudinal direction of the fuselage from the connecting portion to the secondary oil cooler 90 .

In this embodiment, the upper working oil pipe 63 of the oil cooler 60 and the upper working oil pipe 93 of the sub oil cooler 90 pass through the through portion B provided in the slanted frame portion 26c of the radiator frame 26 to the outside of the air intake space. extends to A lower hydraulic oil pipe 64 of the oil cooler 60 extends outside the air intake space through a through portion C provided in the front frame portion 26 b of the radiator frame 26 . A lower hydraulic oil pipe 94 of the secondary oil cooler 90 extends outside the air intake space through a penetration portion D provided in the front frame-shaped portion 26 b of the radiator frame 26 .

[Penetration part B]
The penetrating portion 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, as shown in FIGS. The plate member 95 is detachably attached to the slanted frame portion 26c by bolts.

Concave portions 26m and 26n are formed at the ends of the oblique frame portion 26c facing the opening 26k. Concave portions 95 a and 95 b are formed at the ends of the plate-like member 95 . The recess 26m and the recess 95a are combined to form a through hole through which the upper hydraulic oil pipe 63 of the oil cooler 60 passes. The recessed portion 26n and the recessed portion 95b are combined to form a through hole through which the upper hydraulic oil pipe 93 of the sub oil cooler 90 passes. In the oblique frame portion 26c, the recess 26m is provided with the packing 26p, and the recess 26n is provided with the packing 26q. In the plate member 95, a packing 95c is provided in the recess 95a, and a packing 95d is provided in the recess 95b.

By attaching the plate member 95 to the slanted frame portion 26c of the radiator frame 26, the upper hydraulic oil pipe 63 and the upper hydraulic oil pipe 93 are fixed to the slanted frame portion 26c. When the plate-like member 95 is removed from the slanted frame portion 26c, the upper hydraulic oil pipe 63 and the upper hydraulic oil pipe 93 are released from the slanted frame portion 26c, and the upper hydraulic oil pipe 63 and the upper hydraulic oil pipe 93 are opened through the opening 26k of the slanted frame portion 26c. It becomes possible to pull out the hydraulic oil pipe 93 to the air intake space. As a result, when the oil cooler 60 and the sub oil cooler 90 are unlocked and maintenance is performed, the degree of freedom of movement of the oil cooler 60 and the sub oil cooler 90 is increased, and maintenance is further facilitated.

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 tube 63b is inserted into the flexible tube 63a, and the tip of the rigid tube 63b extends from the outside of the air intake space (the front side of the oblique frame portion 26c) to the inside of the air intake space (the oblique frame shape). rear side of the portion 26c). As a result, the upper hydraulic oil pipe 63 is securely fixed to the oblique frame portion 26c, and an excessive load is applied to the flexible pipe 63a of the upper hydraulic oil pipe 63 when the oil cooler 60 is swung (FIG. 10). is suppressed.

[Penetration part C]
The penetrating portion C of the front frame-shaped portion 26b is composed of an opening 26r formed in the front frame-shaped portion 26b and a joint member 96, as shown in FIGS. The joint member 96 is detachably attached to the front frame portion 26b with bolts.

The joint member 96 includes a plate-like portion 96a and tubular portions 96b and 96c. As shown in FIG. 18, in a state where the joint member 96 is attached to the front frame-shaped portion 26b, the plate-shaped portion 96a is positioned along the rear surface of the front frame-shaped portion 26b (the surface on the intake space side). are fixed to the front frame-shaped portion 26b by bolts. The tubular portion 96b protrudes into the intake space and is connected to the inner portion 64a of the lower hydraulic oil pipe 64. As shown in FIG. The tubular portion 96c protrudes to the outside of the intake space, and is connected to the outer portion 64b of the lower hydraulic oil pipe 64. As shown in FIG.

By attaching the joint member 96 to the front frame-shaped portion 26b of the radiator frame 26, the lower hydraulic oil pipe 64 is fixed to the front frame-shaped portion 26b. When the joint member 96 is removed from the front frame-shaped portion 26b, the fixing of the lower hydraulic oil pipe 64 to the front frame-shaped portion 26b is released, and the lower hydraulic oil pipe 64 can be pulled out to the intake space through the opening 26r of the front frame-shaped portion 26b. It becomes possible. This increases the degree of freedom of movement of the oil cooler 60 when maintenance is performed with the oil cooler 60 being unlocked, making maintenance even easier.

Since the configuration of the penetrating portion D is the same as that of the penetrating portion C, the description thereof is omitted.

(2) In the above embodiment, an example in which the condenser 40 is supported by the frame 41 that can swing and is detachable from the radiator frame 26 has been described. However, it is also possible to adopt a form in which it is supported by a frame that is swingable and removable from the radiator frame 26 .

(3) The frame 41 may be supported by the radiator frame 26 via two or more hinges.

(4) The drive section 15 of the combine may be provided with three cooling devices, the condenser 40, the oil cooler 60, and the intercooler 80, or may be provided with four cooling devices including the secondary oil cooler 90. However, five or more cooling devices may be provided.

(5) Even if the transmission of the combine (work vehicle) is equipped with an HST (hydrostatic continuously variable transmission mechanism), and the oil cooler 60 (and/or the secondary oil cooler 90) is configured to cool the hydraulic oil of the HST. good.

INDUSTRIAL APPLICABILITY The present invention can be applied to harvesters such as ordinary combine harvesters and self-throwing combine harvesters, agricultural vehicles such as tractors and rice transplanters, and can be applied not only to agricultural vehicles but also to construction machinery and other work vehicles.

17: radiator 18: cooling fan (fan)
22: Dust-proof case (dust-proof part)
26: Radiator frame 26g: Through hole 27: Fixing member 40: Condenser (first cooling device)
41: Frame 60: Oil cooler (second cooling device)
80: intercooler (third cooling device)
A: Hinge Y3: Axial center

Claims (8)

a radiator;
a fan that blows air to the radiator;
a radiator frame supporting the radiator;
a dustproof part supported by the radiator frame in a swingable and openable state and removing dust from the wind sent to the radiator;
a first cooling device arranged between the radiator and the dust-proof part;
a frame that supports the first cooling device;
The work vehicle, wherein the frame is swingably supported by the radiator frame via a hinge portion, and is attachable to and detachable from the radiator frame at the hinge portion. The work vehicle according to claim 1, wherein the frame is supported by the radiator frame through only one hinge portion. A hose connected to the first cooling device,
3. The work vehicle according to claim 1, wherein the hose extends from the first cooling device toward the hinge along the direction in which the frame extends, and passes near the hinge. The work vehicle according to any one of claims 1 to 3, further comprising a second cooling device arranged between the radiator and the first cooling device so as to overlap with the frame when viewed in the lateral direction of the machine body. 5. The work vehicle according to claim 4, wherein the second cooling device is movable so as to protrude outward in the lateral direction of the machine body from the radiator frame in a state in which the frame is detached from the radiator frame. The working vehicle according to claim 4 or 5, further comprising a third cooling device arranged between the first cooling device and the dustproof section in a state overlapping with the first cooling device when viewed in the left-right direction of the machine body. 7. The work vehicle according to claim 6, wherein the third cooling device is swingable about an axis extending in a direction intersecting with an extending direction of a swing axis of the hinge portion. The radiator frame includes a through hole through which a sub-hose connected to the third cooling device passes, and a fixing member that presses and fixes the sub-hose. The work vehicle according to claim 7, wherein the third cooling device is in a swingable state.

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