JP2001041043A - Cleaning facilitating structure for cooler - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve a cleaning property of a cooler such as a radiator for engine cooling and an oil cooler for cooling working oil to be mounted on construction machinery, agricultural machinery, working machinery, etc., and improve cleaning efficiency concerning a cleaning facilitating structure of the cooler. SOLUTION: An oil cooler 28 for working oil of construction machinery loaded on a machine body 2 of the construction machinery and arranged on the front side of a radiator 18 at an angle α set in accordance with designing specifications relative to an upper part front surface of the radiator 18 for cooling an engine of the construction machinery is provided, a a hinge 32 to rotate the oil cooler 28 to the front relative to the radiator 18 and to support on the side of the machine body 2 is provided, a clearance is secured between itself and a structure 34 to approach by arranging the oil cooler 28 by inclining it relative to the front surface of the radiator 28, cleaning work of the oil cooler 28 and the radiator 18 is facilitated, and cooling performance is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is mounted on construction machines such as hydraulic excavators, self-loaders, bulldozers, wheel loaders, crawler-type loaders, agricultural machines, working machines and the like (hereinafter simply referred to as construction machines). The present invention relates to a structure for facilitating cleaning of a cooling machine such as a radiator for cooling an engine and an oil cooler for cooling hydraulic oil.

[0002]

2. Description of the Related Art Among construction machines, agricultural machines, working machines and the like, the construction machines such as a hydraulic shovel, a self-loader, a bulldozer, a wheel loader, and a crawler-type loader are well known in the art. It is used for excavating rocks such as tunnels, rivers, roads, etc. and for breaking down buildings and buildings.

[0003] The structure of the hydraulic excavator as the construction machine is provided with an upper rotating body 2 as a body of the hydraulic excavator rotatably provided above a lower traveling body 1 as shown in FIG. I have. An oil cooler 28 for the construction machine working oil is arranged in front of the engine cooling radiator 18 arranged on the upper swing body 2.

Further, a cooling fan 16 driven by the engine 8 is provided behind the radiator 18, and the cooling fan 16 sucks cooling air from the outside of the body to the inside to cool the oil cooler 28 and the radiator 18. Has become. Therefore, since the hydraulic excavator operates in the above-described work site or the like, dust mixed in the air used for the cooling air adheres to the surfaces of the radiator 18 and the oil cooler 28, and the dust easily adheres to the surface. ,
In some cases, the work of removing the attached dust or the like must be frequently performed.

[0005] Coolers 200 such as the oil cooler 28 and the radiator 18 of the hydraulic excavator of the construction machine are arranged such that the radiator 18 and the oil cooler 28 are arranged in front and rear. Further, in order to facilitate the cleaning of the cooling cores of the oil cooler 28 and the radiator 18, the oil cooler 28 installed on the front side can be rotated on the left side of the radiator 18 as shown in FIG. It is conceivable to open and close horizontally by the hinge 32 that is connected to the oil cooler 28. However, at the time of opening and closing the above horizontal opening, the lower end of the oil cooler 28 interferes with a structure close to the oil cooler 28, for example, the skirt portion 34 of the body. And so forth, the lower part of the oil cooler 28 cannot be lowered so much.

In other words, when the oil cooler 28 is to be opened and closed laterally as described above, the length below the oil cooler 28 is shortened like the lower part 24 of the oil cooler 28 shown by a two-dot chain line in FIG. It must be small. It is considered that if the height of the skirt portion 34 of the body of the hydraulic excavator is reduced, the length below the oil cooler 28 may not be reduced, but the height of the skirt portion 34 may be reduced. Due to the structure of the body of the above-mentioned hydraulic excavator, it cannot be reduced so much because of the need for strength.

[0007]

However, in the conventional structure shown in FIG. 8, since the oil cooler 28 can be opened and closed laterally as described above, the height of the skirt portion 34 is reduced due to the above-mentioned restrictions. Therefore, it is necessary to shorten the lower part of the oil cooler 28 to make the oil cooler 28 small.
8. Even if the cleaning work of the radiator 18 is facilitated, the cooling performance of the oil cooler 28 is reduced.

In order to prevent the cooling performance of the oil cooler 28 from deteriorating, the length of the oil cooler 28 in the width direction is increased while the lower portion of the oil cooler 28 is shortened to reduce the effective front surface area of the cooling core. If it increases, the length of the oil cooler 8 in the width direction increases, and a space for accommodating the upper revolving unit 2 as the machine body is required, so that the entire hydraulic excavator is increased in size and the cost is increased.

In order to prevent the cooling performance of the oil cooler 28 from deteriorating, the surface area of the cooling core on the front side of the oil cooler 28 is not changed while the lower portion of the oil cooler 28 is shortened as described above. When the cooling core is configured so as to be double or triple parallel in the front-back direction of the cooling core to increase the cooling capacity, the air resistance of the cooling air passing through the polymerization cooling core increases. As a result, the cooling efficiency is reduced.

The present invention has been made in view of such problems, and has an angle set in accordance with design specifications with respect to an upper front surface of a radiator for cooling an engine of the construction machine, which is mounted on the body of the construction machine. An oil cooler for construction machine hydraulic oil disposed in front of the radiator, a hinge for rotating the oil cooler forward with respect to the radiator and supporting the oil cooler on the machine body side, and Can be disposed at an angle with respect to the front of the radiator to secure a gap between adjacent structures, to facilitate the cleaning work of the oil cooler and the radiator, and to improve the cooling performance. It is an object of the present invention to provide a structure for facilitating cleaning of a cooler which is improved.

[0011]

According to a first aspect of the present invention, there is provided a structure for facilitating cleaning of a cooling machine according to the present invention, comprising a radiator for cooling an engine mounted on a body of a construction machine and operating the construction machine. An oil cooler for construction machine hydraulic oil disposed at the radiator front side at an angle set by design specifications with respect to the upper front surface of the radiator,
A hinge for rotating the oil cooler forward with respect to the radiator and supporting the oil cooler on the machine body side.

According to a second aspect of the present invention, there is provided a structure for facilitating cleaning of a cooler according to the first aspect, wherein the hinge is disposed substantially on an axis of rotation of the hinge disposed on one side of the oil cooler. An inlet and an outlet for the operating oil of the oil cooler are provided near the rotation axis, and a pipe for the operating oil is connected to the inlet and the outlet for the operating oil.

According to a third aspect of the present invention, in the structure for facilitating the cleaning of the cooler according to the first or second aspect, the hinge moves the oil cooler forward and leftward and rightward with respect to the radiator. , And upwardly. According to a fourth aspect of the present invention, in the structure for facilitating cleaning of the cooler according to the second or third aspect, the inflow and the inflow of the hydraulic oil to the inlet and the outlet of the hydraulic oil via a rotary pipe joint are provided. It is characterized in that the above-mentioned pipe for outflow is connected.

According to a fifth aspect of the present invention, in the structure for facilitating the cleaning of the cooler, the piping connected to the rotary pipe joint and the inlet and outlet of the hydraulic oil in the configuration of the fourth aspect is provided. And at least one of the elastic member and the slide member is displaceably attached to the body side.

According to a sixth aspect of the present invention, in the structure for facilitating cleaning of the cooler according to the first aspect of the present invention, one side of the construction machine is provided so as to be openable and closable. It is characterized by having a door provided on the one side part, and the oil cooler and the radiator provided so as to overlap with the rear of the door.

[0016]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an embodiment of the present invention, and is an overall explanatory view showing a case where a structure for facilitating cleaning of a cooler according to the present invention is applied to a hydraulic shovel. FIG.
FIG. 3 is a schematic explanatory view of a main part showing a cross section along the line A, FIG. 3 is a schematic enlarged explanatory view schematically showing a portion where a radiator and an oil cooler are arranged in FIG. 2, and FIG. FIG. 5 is a schematic explanatory view schematically showing a main part of an arrow Y5 in FIG. 2, FIG. 6 is a schematic explanatory view showing a modification of the embodiment in FIG. 3, and FIG. 7 is a schematic explanatory view showing a modification of the hinge of FIG.

The structure for facilitating the cleaning of the cooler of the present embodiment is as follows.
An upper revolving structure 2 which is a body of a hydraulic shovel provided rotatably on a lower traveling structure 1 indicated by a two-dot chain line in FIG. 2 is provided. As shown in FIG. 1, between an operator room 4 provided in front of the upper swing body 2 and a counter weight 6 provided in a rear portion of the upper swing body 2, a horizontal position is provided in front of the counter weight 6. An engine 8 is provided. As shown in FIG. 1, on the left side portion 10 of the excavator, the left and right doors 10L and 10R which are divided into two parts are connected via hinges 12 to the rear wall 14 and the operator room 4 as shown in FIG. It is attached to the rear part and can be opened and closed in the left-right direction.

As shown in FIG. 2, a cooling fan 16 driven by the engine 8 is provided in front of the engine 8, and a radiator 18 for cooling the engine is provided on the upper rotating body 2 in front of the cooling fan 16. It is mounted on the radiator mounting frame 20 by bolts 22 and nuts 22a. The hydraulic oil supplied from the hydraulic pump 9 driven by the engine 8 is supplied to the control valve, the pipe 36a, and the rotary pipe joint 40a provided on the rotation axis L1 of the hinge 32 as shown in FIG. The oil is supplied from the inlet 28A of the working oil of the oil cooler 28 to the upper tank 28a of the oil cooler 28, cooled by the cooling core 28c and flows to the lower tank 28b, and further from the outlet 28B provided at the upper part of the oil cooler 28. The oil flows to the left side of the oil cooler 28 where the hydraulic oil inlet 28A is provided, and is circulated to the hydraulic oil tank via a rotary pipe joint 40b and a pipe 36b provided on the rotation axis L1 of the hinge 32. It is configured to:

In the above embodiment, the oil cooler 28
The hydraulic oil which has flowed out of the lower tank 28b and cooled is supplied to the above-mentioned outlet 2 extending to the upper side of the oil cooler 28.
8B, it is configured to be circulated to the hydraulic oil tank via the rotary pipe joint portion 40b, but is not limited to this. For example, as shown by a two-dot chain line in FIG. The same function and effect as described above can be obtained even when the oil is circulated to the hydraulic oil tank via the outlet 28B of the oil cooler 28 provided on the lower side and the rotary joint 40b.

As shown in FIG. 2, an angle .alpha. Is set to the front surface of the radiator 18 according to the design specifications.
The oil cooler mounting plate 30 is mounted on the left and right sides of the radiator 18 as shown in FIG. As shown in FIG. 2, the oil cooler 28 is attached to the front end of the oil cooler mounting plate 30 at the angle α by a hinge 32 so as to be able to open sideways via the hinge 32, and the rotation axis L1 of the hinge 32 at the angle α Because it can be easily opened and closed with the rotation center as
The wing bolt W provided on the mounting plate 30 of the oil cooler 28 on the side where the hinge 32 is not mounted by the mechanic.
B, the oil cooler 28 is opened, and the oil cooler 28 and the radiator 18 are placed on the ground on the side of the hydraulic excavator, and high-pressure air or high-pressure water from a high-pressure injector or the like is blown to the oil cooler 28 very easily. Can perform cleaning work.

As shown in FIGS. 2 and 5, the oil cooler 28 in this embodiment is configured so as to be able to open laterally about the rotation axis L1 of the hinge 32 to the left in front of the radiator 18 in the left direction. Therefore, the lower portion of the oil cooler 28 is not shortened, and does not interfere with a structure adjacent to the front of the oil cooler 28, for example, the skirt portion 34 of the upper revolving unit 2 or a device mounted on the upper revolving unit 2. The oil cooler 28 can be easily rotated, the size of the oil cooler 28 conventionally used can be secured, and required cooling performance can be maintained.

As shown by the two-dot chain line in FIGS. 2 and 3, in the above-described embodiment, the opening and closing direction of the oil cooler 28 is such that it opens and closes laterally to the left with respect to the front surface of the radiator 18. However, the present invention is not limited to this, and even if the radiator 18 opens and closes laterally to the right with respect to the front surface, the opening and closing can be easily performed without interfering with the adjacent structure 34.

The radiator 18 and the oil cooler 28
Left and right oil cooler mounting plates 30 provided at both left and right ends
The upper plate 30a that bridges the upper part of the lower plate 30 and the lower plate 30 that bridges the lower part
The oil cooler mounting plate 30, the upper plate 30a, and the lower plate 30b constitute a shroud for taking in the cooling air of the radiator 18, and as shown in FIG. The oil cooler is connected to the upper part of the cooler 28 via the hinge 32 and can be opened and closed by rotating the hinge 32 around the rotation axis L2 in the upward direction in front of the radiator 18 in the same manner as in the above embodiment. The rotation of the oil cooler 28 can be performed smoothly without interfering with the skirt portion 34 or the like, which is a structure close to the oil cooler 28.

As shown in FIGS. 2, 3, and 6, the hinge 32 for opening and closing the oil cooler 28 has the rotation axis L1 or L1.
2 is provided with an inlet 28A and an outlet 28B of the working oil of the oil cooler 28, and the hinge 32 of the oil cooler 28 is provided.
The pipes 36a and 36b are connected to the hydraulic oil inflow port 28A and the outflow port 28B through rotary pipe joints 40a and 40b provided on the substantially rotation axis L1 or L2 of the above.

The above-mentioned rotary pipe joints 40a, 40b
Is an inlet 2 for each hydraulic oil as shown in FIGS.
The recesses O1 and O2 are provided on the outer periphery of the outlet 8B and the outlet 28B and on the inner periphery of the pipes 36a and 36b. Thus, the pipes 36a and 36b are configured to be rotatable with respect to the inlet 28A and the outlet 28B of the working oil.

Since the rotary pipe joints 40a and 40b are provided, the rotation axis L1 or L2 of the hinge 32 described above is provided.
When the oil cooler 28 rotates around the center, the inlet 28A and the outlet 28B of the oil cooler 28 rotate at the O-ring OR portion of the rotary pipe joints 40a and 40b, and the pipe 36
a, 36b, the rotational force of the oil cooler 28 is not transmitted,
Deformation due to rotational displacement of the oil cooler 28 can be prevented, and the oil cooler 28 can be easily opened and closed.

In the above embodiment, the hinge 32 and the rotation axis L1 or L2 of the rotary pipe joints 40a and 40b are arranged on the same axis, but the present invention is not limited to this. That is, an inlet 28A and an outlet 28B of the hydraulic oil of the oil cooler are provided so that the rotation axis of the hinge 32 for opening and closing the oil cooler 28 is near the rotation axis of the rotary fittings 40a, 40b. Inlet 28A and outlet 28
If the flexible pipes 36a and 36b are connected to B, the flexible pipes 36a and 36b follow the oil cooler 28 even if the oil cooler 28 rotates about the substantially rotation axis L1 or L2 of the hinge 32. Piping 36a, 36b generated by rotation
And can smoothly rotate by absorbing the displacement.

Further, the oil cooler 2 shown in FIGS.
8 is rotated by the hinge 32 and the rotary fittings 40a, 40b.
Is not limited to the above-described embodiment, and is, for example, shown in FIG.
In the case of the modification shown in (1), the hinge 32 is rotatable around a cylindrical portion 38h attached to the upper swing body 2 side of the hydraulic excavator and an outer circumferential portion of the cylindrical portion 38h. And an arm portion 38j disposed in the arm.

As shown in FIG. 7, the hinge 32 is provided with a ring groove 32R on the outer peripheral surface of the cylindrical portion 38h.
0a, 40b so as to be on the above-mentioned rotation axis L1 or L2, so that the ring portion 32a at one end is rotatably fitted into the ring groove 32R and the other end 32b is attached to the oil cooler 28 by the bolt B. It is configured. Arm 3
8j includes a pair of arm members 32A and 32B,
The ring part 32a at one end is composed of an arm member 32A and an arm member 32B.
Are connected rotatably by bolts B, and the other ends 32b of the two are connected to the oil cooler 28 by bolts B.

Also, as shown in FIG. 7, the rotary pipe joints 40a, 40b are at least substantially coaxial with the rotary axis L2 and the rotary axis of the ring 32a at one end of the hinge 32, for example. By providing the hinges 32 above and below the cylindrical portion 38h, the displacement of the pipes 36a and 36b generated with the rotation of the oil cooler 28 can be minimized and the rotation of the oil cooler 28 can be performed smoothly. Good.

In the above modification, as shown in FIG. 7, the rotating pipe joints 40a and 40b provided on the upper and lower sides are on the same rotation axis as the cylindrical part 38h of the hinge 32 provided on the upper rotating body 2 side. Although provided integrally, the present invention is not limited to this. For example, the cylindrical portion 38h and the rotary fittings 40a and 40b shown in FIG. 7 are provided on the same rotation axis L2. The hinges 40a, 40b are not connected to the hinges 32, but are attached independently to the frame 2F of the upper swing body 2 as shown by a two-dot chain line in FIG. It can also be attached to 2F.

Also, if necessary, the rotary pipe joint 40a,
The frame 40 of the upper revolving unit 2 is made of an elastic member, a slidable slide member, or the like.
If the oil cooler 28 is mounted on the F side or the oil cooler 28 side, the rotation of the oil cooler 28 can be performed smoothly, and the elasticity can be maintained even when the hydraulic excavator is operated or the mounting portion fluctuates during operation. It can be absorbed by a member or a slide member, and deformation and breakage of the pipes 36a and 36b can be prevented.

Further, as described in the above embodiment and modified examples, the rotation axes of the above-mentioned rotating pipe joints 40a and 40b and the rotation axes of the two hinges 32 provided above and below are on the same axis. , Rotating pipe joints 40a, 40b
Even if the above-described rotation axis L1 or L2 is disposed near the rotation axis of the hinge 32, the elastic member or the flexible pipe for absorbing the displacement generated by the rotation of the oil cooler 28 can be used. By providing 36a, 36b, the displacement can be absorbed by at least one of them, the rotation can be performed smoothly, and the vibration and the mounting portion of the construction machine during operation can be reduced. Fluctuations can be absorbed, and damage to the pipes 36a, 36b and the like can be prevented.

As shown by a two-dot chain line in FIGS. 1 and 2, when cleaning the excavator cooler 200, first, the doors 10R and 10L provided on the side of the excavator are opened, As shown in FIG. 5, the oil cooler 28 is opened to the left front, and the oil cooler 28 and the radiator 18 can be cleaned effectively and easily by blowing high-pressure air or high-pressure water from a high-pressure injector.

[0035]

As described above in detail, according to the structure for facilitating the cleaning of a cooling machine according to the first aspect of the present invention, an engine cooling system mounted on the body of a construction machine for operating the construction machine is provided. A radiator, an oil cooler for construction machine hydraulic oil disposed at the front side of the radiator at an angle set by design specifications with respect to the upper front surface of the radiator, and the oil cooler forward with respect to the radiator. A hinge that rotates and is supported on the fuselage side, so that the oil cooler is disposed at an angle with respect to the radiator front surface so that the oil cooler does not interfere with a structure adjacent to the oil cooler. By rotating the oil cooler forward of the radiator via the hinge, the oil cooler and the radiator can be cleaned effectively and easily. It is possible, it can be secured above the oil cooler, the cooling performance of the radiator.

According to the structure for facilitating the cleaning of the cooler according to the second aspect of the present invention, in the structure of the first aspect, the hinge is disposed on one side of the oil cooler and substantially on the rotation axis of the hinge. The hydraulic oil inlet and outlet of the oil cooler are provided near the rotary axis, and the hydraulic oil piping is connected to the hydraulic oil inlet and outlet. In addition to the effect, the rotation of the oil cooler can be performed smoothly, and the displacement of the pipe is absorbed in accordance with the displacement generated with the rotation of the oil cooler, and the twist, deformation and breakage of the pipe are reduced. In addition to the above, the efficiency of the cleaning operation can be improved.

According to the structure for facilitating the cleaning of the cooler according to the third aspect of the present invention, in the structure of the first or second aspect,
3. The effect according to claim 1, wherein the hinge is configured to rotate the oil cooler in one of leftward, rightward, and upward directions on the front side with respect to the radiator. In addition, the oil cooler is rotated in any one of the left, right, and upward directions, so that the oil cooler and the radiator can be efficiently and easily cleaned.

According to the structure for facilitating cleaning of the cooler of the present invention described in claim 4, in the structure of claim 2 or 3,
Since the piping for inflow and outflow of the hydraulic oil was connected to the inlet and outlet of the hydraulic oil via a rotary pipe joint,
In addition to the effects of the second and third aspects, the displacement of the inlet and the outlet of the hydraulic oil generated by the rotation of the oil cooler can be prevented from affecting the piping as much as possible.

According to the fifth aspect of the present invention, in the structure for facilitating cleaning of the cooler according to the fourth aspect of the present invention, in the configuration of the fourth aspect, the rotary pipe joint and the hydraulic oil are connected to the inlet and the outlet. 6. The oil cooler according to claim 5, wherein at least one of the pipes is displaceably attached to the body by at least one of an elastic member and a slide member. The oil cooler is firmly supported on the side of the airframe, the inlet and outlet of the oil cooler are guided and rotated by the rotary fitting portion, and further, the rotary fitting and the piping can be displaced. Can be smoothly rotated.

According to a sixth aspect of the present invention, in the structure for facilitating cleaning of a cooler according to any one of the first to fifth aspects, one side of the construction machine is provided so as to be openable and closable. The door provided on the one side and the oil cooler and the radiator provided so as to be superimposed on the rear of the door, so that in addition to the effect of any one of claims 1 to 6, By opening the door in front of the oil cooler, a space for the rotation of the oil cooler is secured, and the oil cooler is widely opened, so that the oil cooler and the radiator can be easily cleaned. .

[Brief description of the drawings]

FIG. 1 shows one embodiment of the present invention, and is an overall explanatory view showing a case where a structure for facilitating cleaning of a cooler of the present invention is applied to a hydraulic shovel.

FIG. 2 is a schematic explanatory view of a main part showing a cross section along line 2A─2A in FIG. 1;

FIG. 3 is a schematic enlarged explanatory view schematically showing a related arrangement portion of a radiator and an oil cooler in FIG. 2;

FIG. 4 is a schematic explanatory view of a main part taken along arrow Y4 in FIG. 2;

FIG. 5 is a schematic explanatory view schematically showing a main part of an arrow Y5 in FIG. 2;

FIG. 6 is a schematic explanatory view showing a modification of the embodiment of FIG. 3;

FIG. 7 is a schematic explanatory view showing a modified example of the hinge of FIGS. 4 and 6;

FIG. 8 is a schematic explanatory view showing a related arrangement portion of an oil cooler and a radiator of a conventional hydraulic excavator.

[Explanation of symbols]

 Reference Signs List 2 Upper revolving unit 2F Airframe side frame 4 Operator room 6 Counter weight 8 Engine 10 Door 10L, 10R Door 12 Hinge 16 Cooling fan 18 Radiator 28 Oil cooler 28A Inlet of hydraulic oil for oil cooler 28B Flow of hydraulic oil for oil cooler Outlet 30 Oil cooler mounting plate 30a Upper plate 30b Lower plate 32 Hinge 32a Ring portion 32A Arm member 32B Arm member 32R J-ring groove 36a Piping 36b Piping 38h Hinged cylindrical portion 38j Hinged arm 40a, 40b Rotary pipe joint O1 , O2 recess OR O-ring L1, L2 axis of rotation

Claims (6)

[Claims] An engine cooling radiator mounted on a body of a construction machine for operating the construction machine, and an radiator arranged in front of the radiator at an angle set by a design specification with respect to an upper front surface of the radiator. An oil cooler for hydraulic oil for construction machinery to be provided, and a hinge for rotating the oil cooler forward with respect to the radiator and supporting the oil cooler on the machine body side, wherein the structure for facilitating cleaning of the cooler is provided. . 2. An inflow port and an outflow port of hydraulic oil for the oil cooler are provided on or near the rotation axis of the hinge disposed on one side of the oil cooler,
The structure for facilitating cleaning of a cooling machine according to claim 1, wherein a piping for the hydraulic oil is connected to an inlet and an outlet for the hydraulic oil. 3. The hinge is configured to rotate the oil cooler in one of leftward, rightward, and upward directions on the front side with respect to the radiator, The structure for facilitating cleaning of a cooler according to claim 1 or 2. 4. The cooling machine according to claim 2, wherein the pipe for flowing in and out of the hydraulic oil is connected to an inlet and an outlet of the hydraulic oil via a rotary pipe joint. Cleanability improvement structure. 5. The apparatus according to claim 1, wherein at least one of the pipes connected to the rotary pipe joint and the inlet and outlet of the hydraulic fluid is displaceable by one of an elastic member and a slide member. 5. The structure for facilitating cleaning of a cooler according to claim 4, wherein the structure is attached to the body side. 6. A door provided on the one side of the construction machine so as to open and close one side of the construction machine, and the oil cooler and the radiator provided so as to be overlapped behind the door. The structure for facilitating cleaning of a cooler according to any one of claims 1 to 5, characterized in that: