JP2001041042A - Cleaning property improving structure of cooler and cleaning property improving method of cooler - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve a cleaning property of a cooler of a radiator for engine cooling, an oil cooler for cooling working oil, an intercooler for a supercharger, etc., to be loaded on construction machinery, agricultural machinery, working machinery, etc., concerning a cleaning property improving structure of the cooler and a cleaning property improving method of the cooler and improve cleaning efficiency. SOLUTION: An oil cooler 28 for construction machinery working oil is arranged in front of a radiator 18 for engine cooling, an intercooler 30 for a supercharger is arranged in front of the oil cooler 28, first and second rotating mechanisms to rotate the oil cooler 28 and the intercooler 30 to the front side relative to the radiator 18 are arranged, and the intercooler 30, the oil cooler 28 and the radiator 18 are efficiently cleaned by rotationally displacing the intercooler 30 and the oil cooler 28 to the front of the radiator 18 by the first and second rotating mechanisms.

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 improving the cleanability of a cooler such as a radiator for cooling an engine, an oil cooler for cooling hydraulic oil, and an intercooler for a supercharger, and a method for improving the cleanability of a cooler.

[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.

As is well known, the construction machine has a structure in which an oil cooler for the working oil of the construction machine is provided in front of a radiator for cooling the engine, which is disposed above an upper swing body of the construction machine. It is disposed above the upper revolving superstructure. A cooling fan driven by the engine is provided behind the radiator, and the cooling fan sucks cooling air from the outside of the machine to the inside to cool the oil cooler and the radiator.

Therefore, since the construction machine operates at the above-mentioned work site or the like, dust mixed in the air used for the cooling air adheres to the surfaces of the radiator and the oil cooler. Since it is easily soiled, the work of removing the attached dust or the like may need to be performed frequently. As a conventional technique for facilitating the cleaning of the oil cooler and the radiator, FIG.
The lower end of the oil cooler 02 is connected to the hinge 06 as shown in FIG.
The upper portion of the oil cooler 02 can be tilted freely with respect to the radiator 01, or the lower end portion of the oil cooler 02 can be pivotally supported with a hinge 06 as shown in FIG. In some cases, only the lower end of the oil cooler 02 can be moved forward from the front side of the radiator 01 to increase the distance between the oil cooler 02 and the radiator 01.

[0005] In the structure of the prior art, as shown in FIG. 10, first, as shown in FIG. 10, the engine hood 010 is opened, and the oil cooler 02 is tilted via the hinge 06 to make a space between the oil cooler 02 and the radiator 01. For example, high-pressure air or high-pressure water is blown onto the cooling cores of the oil cooler 02 and the radiator 01 from above the body of the construction machine by an air gun 011 to remove dust adhering to the cooling cores, thereby performing a cleaning operation.

[0006] In addition to the above, other conventional techniques include the oil cooler and the radiator, and the oil cooler is tilted outward and leftward and rightward with respect to the radiator. Technology (Japanese Unexamined Patent Publication No.
552). Also, in order to improve the performance of the engine mounted on the construction machine, and when the exhaust gas regulations of the engine become stricter than at present, one of the measures is to install a supercharger on the engine to improve the engine performance. At least, it is conceivable to reduce the exhaust gas by adopting the smallest engine as possible. In this case, however, the excess of the engine is provided in front of an oil cooler 02 disposed in front of the radiator 01. The feeder intercooler is superimposed and fixed to the body frame side.

[0007]

However, FIG.
In the structure shown in FIG. 9, although the oil cooler 02 is tilted, the opening width between the oil cooler 02 and the radiator 01 is narrow because the distance from the oil cooler 02 to the side portion 03 of the construction machine is not sufficient. Since the lower end of the oil cooler 02 projects more toward the side portion 03, the oil cooler 02 becomes even narrower than that of FIG. 8).

In particular, if the clearance from the side part 03 to the oil cooler 02 is small, the opening width becomes narrower and it is not only difficult to clean, but also the space between them cannot be utilized, so that the storage space for various auxiliary equipments Is limited. Further, as shown in FIG. 10, the cleaning operation is performed from the upper part of the machine body. However, it is expected that the upper surface of the machine body will be wet by high-pressure water or the like, and it will be difficult to perform the cleaning operation.

Further, a radiator 01, an oil cooler 02,
When the intercooler is superimposed and fixed to the upper rotating body, the cleaning work becomes particularly difficult,
It will take time. Since the radiator 01, the oil cooler 02, and the intercooler are arranged in a three-fold manner, a total of six radiators 01, the oil cooler 02, and the intercooler are connected to the inlet and outlet of the cooling medium. Pipes for supplying and discharging the cooling medium for each of the books must be provided, and these pipes are arranged to bend appropriately in a narrow space, but for example, each is arranged as linearly as possible to the target site. At least, it is necessary to prevent the fluid pressure of the cooling medium from increasing.

The above-mentioned other conventional examples are disclosed in JP-A-9-32.
The technique described in Japanese Patent Application Publication No. 552 is merely an improvement of the radiator and the oil cooler when the oil cooler is disposed in front of the radiator. SUMMARY OF THE INVENTION The present invention has been made in view of such problems, and has a structure for improving the cleanability of a cooler such as a radiator, an oil cooler, and an intercooler. The purpose is to provide a method for improving the performance.

[0011]

According to a first aspect of the present invention, there is provided a cooling device for improving the cleanability of a cooling machine, comprising: a radiator for cooling an engine mounted on a construction machine for operating the construction machine; An oil cooler for construction machine hydraulic oil disposed in front of the radiator, an intercooler for an engine supercharger disposed in front of the oil cooler, and the intercooler and the oil cooler on the outer side with respect to the radiator. And a rotation mechanism for causing the rotation.

According to a second aspect of the present invention, there is provided a structure for improving cleanability of a cooler according to the first aspect, wherein the rotating mechanism rotates the intercooler outward with respect to the radiator. And a second rotation mechanism for rotating the oil cooler outward with respect to the radiator. According to a third aspect of the present invention, in the structure of the second aspect, the supercharged fluid of the intercooler is provided on or near the rotation axis of the first rotation mechanism of the intercooler. Are provided, and a pipe for supplying and discharging the supercharging fluid is connected to the inlet and the outlet of the supercharging fluid.

According to a fourth aspect of the present invention, in the structure for improving the cleanability of a cooler according to the second or third aspect, on the rotation axis of the second rotation mechanism of the oil cooler or in the vicinity of the rotation axis. A pipe for supplying and discharging the hydraulic oil is connected to an inlet and an outlet of the hydraulic oil of the oil cooler via a rotary pipe joint provided in the oil cooler.

According to a fifth aspect of the present invention, there is provided a structure for improving cleanability of a cooler according to any one of the second to fourth aspects, wherein the intercooler is provided on an outer side with respect to the oil cooler. A first rotation mechanism for rotating the oil cooler in any one of a direction, a downward direction, a left direction, and a right direction;
And a second rotation mechanism for rotating the intercooler in one of a downward direction, a leftward direction, and a rightward direction, which is different from the rotation direction of the intercooler.

According to a sixth aspect of the present invention, there is provided a structure for improving cleanability of a cooler according to any one of the second to fourth aspects, wherein the intercooler is provided on an outer side with respect to the oil cooler. A first rotating mechanism for rotating the oil cooler in any one of the following directions: downward, leftward, rightward, and the oil cooler is opposed to the radiator in a direction opposite to the rotational direction of the intercooler on the outer side. The above-mentioned second rotation mechanism for rotating is provided.

According to a seventh aspect of the present invention, in the structure for improving cleanability of a cooler according to any one of the second to fourth aspects, the intercooler is provided on an outer side with respect to the oil cooler. A first rotation mechanism for rotating the oil cooler in any one of the following directions: downward, leftward, rightward, and second direction for rotating the oil cooler with respect to the radiator in the same direction as the rotational direction of the intercooler. And a rotation mechanism.

According to an eighth aspect of the present invention, there is provided a structure for improving the cleanability of a cooler according to any one of the first to seventh aspects, wherein the air cleaner connected to the intercooler for the engine supercharger is provided. The construction machine is characterized in that at least a part thereof is housed in a recess provided in a counter weight of the construction machine. According to a ninth aspect of the present invention, in the structure of the eighth aspect, the air cleaner is rotatably supported by a pivot shaft provided in a recess of the counterweight. Is characterized in that at least a part of the air cleaner is housed in the recess, and is rotated around the pivot shaft to be exposed to the engine room side during inspection and maintenance so that the element of the air cleaner can be inserted and removed. .

According to a tenth aspect of the present invention, there is provided a method for improving the cleanability of a cooler, wherein a radiator for cooling the engine for operating the construction machine mounted on the construction machine is provided in front of the radiator. An oil cooler for construction machine hydraulic oil, an intercooler for an engine supercharger disposed in front of the oil cooler, a first rotation mechanism for rotating the intercooler outward with respect to the radiator,
A second rotation mechanism for rotating the oil cooler outward with respect to the radiator; and providing the intercooler with any one of upward, downward, leftward, and rightward outwards relative to the radiator. After the core of the intercooler is cleaned by being rotated by the first rotating mechanism in any direction, the oil cooler is moved outward with respect to the radiator in the upward, downward, leftward, or rightward direction. In the direction different from the rotation direction of the intercooler, the second
The oil cooler and the radiator core are cleaned by being rotated by a rotation mechanism.

According to an eleventh aspect of the present invention, there is provided a method for improving the cleaning property of a cooling machine according to the tenth aspect, wherein the intercooler is arranged such that the intercooler is located upward, downward, leftward, and rightward on the outer side with respect to the radiator. After rotating the core of the intercooler in one of the directions by the first rotating mechanism and cleaning the core of the intercooler, the oil cooler is moved in the same direction as the rotation direction of the intercooler on the outer side with respect to the radiator. The oil cooler and the core of the radiator are rotated by a two-rotation mechanism to clean the core.

According to a twelfth aspect of the present invention, there is provided a method for improving the cleanability of a cooler according to the tenth or eleventh aspect.
An inlet and an outlet for a cooling fluid provided on each of the coolers of the intercooler and the oil cooler on or near the rotation axis of each of the first and second rotation mechanisms; And a pipe for the respective cooling fluid connected to the inflow port and the outflow port of the cooling device. After the cooling device is rotated outward with respect to the radiator by the first and second rotation mechanisms, It is characterized in that the intercooler, oil cooler and radiator are cleaned. Cleaning improvement method.

[0021]

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 a schematic explanatory view in a case where a structure for improving cleanability of a cooler of the present invention is applied to a hydraulic shovel, and FIG. 1 (A) is a cooler mounted on a hydraulic shovel. FIG. 1B is a schematic explanatory view showing a surrounding arrangement portion, FIG. 1B is a schematic explanatory view showing an intercooler portion in FIG. 1A, and FIG. 2 is a modification of a cooling fluid outflow / inlet piping structure of the intercooler in FIG. FIG. 3 is a schematic explanatory view showing an example, FIG. 3 is a schematic plan view showing a disposition position of a cooler mounted on a rear portion of the hydraulic excavator shown in FIG.
FIG. 4 is a schematic explanatory view showing a main part of the arrow Y in FIG.
FIG. 6 is a schematic explanatory view showing a plane of a relevant portion of the cooler shown in FIG. 3, FIG. 6 is a schematic explanatory view in which the hinge and the rotary pipe joint shown in FIG. 4 are arranged on the same rotation axis, and FIG. FIG. 7 is a schematic explanatory view showing a modification of the arrangement position of the hinge and the rotary pipe joint shown in FIG. 6.

The structure for improving the cleanability of the cooler according to this embodiment is as follows.
As shown in FIG. 3, between the operator room 4 provided in front of the upper swing body 2 of the hydraulic shovel as the construction machine and the counter weight 6 provided in the rear part of the upper swing body 2, An engine 8 is provided horizontally on the front side, and the left side portion 10 of the hydraulic excavator is attached to a rear wall 14 and a rear portion of the operator room 4 via right and left doors 10L and 10R via hinges 12. The door 10R is connected to the rear wall 1 on the front side of the counterweight 6.
4 and are provided to be openable and closable in the left-right direction.

A cooling fan 1 driven by the engine 8 is provided in front of the engine 8 as shown in FIGS.
6 is provided, and a radiator 18 for cooling the engine is provided in front of the cooling fan 16 on a radiator mounting frame 20 provided on the upper swing body 2 with bolts 22 and nuts 22a.
It is attached by. In addition, an oil cooler 28 described later is disposed in front of the radiator 18.

Further, an air-cooled intercooler 30 for a supercharger is disposed in front of the oil cooler 28,
The intercooler 30 is provided with a bracket BK at a position substantially in front of the upper tank 18a of the radiator 18 as shown in FIG. 1A, and is provided on the bracket BK as shown by a two-dot chain line in FIG. 1B. First of the rotating mechanism
An inlet 31A and an outlet 31B for the supercharged fluid of the intercooler are provided near the rotation axis L1 of the hinge 32, which is the rotation mechanism K1.

The supercharging fluid inlet 31A is connected to the supercharging fluid flexible pipe 36a, and the supercharging fluid outlet 31B is connected to the supercharging fluid flexible pipe 36b. The flexible pipes 36a and 36b can follow and smoothly rotate even when the hinge 32 rotates about the substantially rotation axis L1 of the hinge 32. Further, in the above embodiment, the inlet 31A and the outlet 31B of the supercharged fluid of the intercooler 30 are provided near the substantially rotation axis L1 of the hinge 32 which is the first rotation mechanism K1, but the invention is not limited to this. As shown in FIG. 2, for example, the hinge 3 of the intercooler 30 is used.
A supercharged fluid inlet 31A and an outlet 31B of the intercooler 30 are provided substantially coaxially with the second rotation axis L1, and flexible pipes 36a and 36b are connected to the supercharged fluid inlet 31A and the outlet 31B. By doing so, the movement of the pipes 36a and 36b caused by the rotation of the intercooler 30 can be suppressed. 1A, the intercooler 30 may be attached to a hinge 32a provided on a lower frame of the upper revolving unit so that the intercooler can be opened forward and downward.

Further, as shown in FIG. 2, the outer circumferences of the inlet 31A and outlet 31B of the supercharging fluid and the pipes 36a and 36b
When the recesses O1 and O2 are provided on the inner periphery of the tube and the two are fitted together, an O-ring OR having a sealing property is interposed in the groove formed by the recess 01 and the recess O2 so that the pipes 36a and 36b If the rotary pipe joints 50A and 50B are configured to be rotatable with respect to the inlet 31A and the outlet 31B of the supply fluid, the rotation of the intercooler 30 can be performed smoothly. Further, as shown by a two-dot chain line in FIG. 1A, the intercooler 30 is mounted via a hinge 32a provided on a lower frame of the upper revolving unit so that the intercooler 30 can be opened downward in the front side. Is also good.

As shown in FIGS. 1A and 3, the radiator 18, the oil cooler 28, the intercooler 3
The intake air sucked from an air cleaner 34 provided between the cooler 200 such as 0 and the operator room 4 through a pipe 34a and compressed by a supercharger 36 is shown in FIGS.
As shown in (1), the supercharged fluid outlet 3 is supplied from the supercharged fluid inlet 31A of the intercooler 30 to the upper tank 30a of the intercooler 30 via the pipe 36a, cooled by the core 30c of the intercooler 30, and passed through the lower tank 30b.
1B is supplied to the intake side of the engine 8 via a pipe 36b.

In the above embodiment, the air cleaner 34 is used.
Is provided between the operator room 4 and the cooler 200, but is not limited to this. For example, as shown in FIG. 3, a concave portion 6a is provided in the counter weight 6, and a two-dot chain line S1 is shown in FIG. When the air cleaner 34 is disposed so that the front side 34c of the air cleaner 34 faces the front side of the cooler 200, and the element 34d of the air cleaner 34 is disposed so that it can be inserted and removed in the arrow Q direction, as shown in FIG. By arranging the pipe 34a in the counterweight 6, it is possible to arrange the pipe from the air cleaner 34 to the supercharger almost linearly without bending as much as possible. Therefore, an increase in fluid resistance is prevented and the performance of the engine is reduced. There is no.

The air cleaner 34 and its piping 34a
It is not necessary to provide the disposing space in the main part on the upper swing body 2, so that the accommodation space of the main part on the upper swing body 2 can be expanded. Then, as shown in FIG. 3, the air cleaner 34 is provided with a pivot shaft 34e in the recess 6a of the counterweight 6, and the pivot shaft 34e
4 is rotatably mounted, and is normally disposed at a position shown by a solid line S2 in FIG. 3, and at the time of maintenance and inspection such as replacement of the above-mentioned element 34d, the position shown by a two-dot chain line S1 in FIG. If the maintenance inspection is performed by rotating, the maintenance inspection becomes easy, and the intake of the cooling air of the cooler 200 is not hindered, and the cooling air suction efficiency can be improved. , The pivot 3 of the air cooler 34
The rotation means by 4e is provided as needed,
3 may be mounted so as not to rotate at the position indicated by the two-dot chain line S1 so as not to hinder the intake of cooling air into the cooler 200.

Although not shown, a rotating mechanism substantially similar to the above-described first rotating mechanism K1 may be provided on both left and right sides of the intercooler 30 so that the intercooler 30 can be rotated to either the left or right. As shown in FIGS. 4 and 5, the oil cooler 28 is provided behind the intercooler 30 with a space in front of the radiator 18 for cooling the engine, and is supported by the upper revolving unit 2 at an upright position. 38, which are provided on substantially coaxial lines above and below 38 and constitute a rotation mechanism rotatable leftward.
Two hinges 40 serving as a rotation mechanism K2 are provided, and are configured to be able to rotate leftward on the outer side of the radiator 18.

In the above-described embodiment, the second rotating mechanism K
2 is provided on a support frame 38 provided on the left side so as to be able to rotate in the left direction. However, the support frame 38 is provided on the right side of the cooler 200 shown in FIG. You may make it rotatable rightward. In the case of the present embodiment, the above hinge 4
The oil cooler 28 is disposed so as to open to the left in front of the excavator with the center at 0. After the oil cooler 28 is opened to the left, the radiator 18 and the oil cooler 28 are moved to the side of the excavator. , High-pressure air or high-pressure water can be blown out from the core to quickly remove the dust accumulated on both cores, thereby cleaning the core.

In the above embodiment, the oil cooler 28 is configured to be rotatable, preferably in the left or right direction, by the second rotation mechanism K2. However, although not shown, for example, the support frame 38 is connected to the upper tank of the radiator 18 by an upper tank. 1
The oil cooler 28 is provided at a height near 8a so as to extend in the front-rear direction of the excavator, and the oil cooler 28 is mounted via hinges 40 provided on the left and right of the support frame 38 which is disposed substantially horizontally. The radiator 18 may be configured to be rotatable in an upward direction, and the support frame 38 (not shown) may be attached to the lower tank 18 of the radiator 18.
b, the hydraulic excavator is disposed substantially horizontally so as to extend in the front-rear direction of the hydraulic excavator, and an oil cooler 28 is attached via hinges 40 provided on the left and right sides of the support frame 38. Even if it is made to be able to rotate in the downward direction, the radiator 18 and the oil cooler 28 are sprayed with the high-pressure air or high-pressure water from the side of the hydraulic shovel in a manner similar to the above, so that the dust deposited on the cores of both the radiator 18 and the oil cooler 28 quickly It can be removed and cleaned.

As shown in FIG. 3 and FIG. 4, the hydraulic oil which has returned to a high temperature by running the hydraulic excavator or operating the working device is controlled by the control valve 46 and the pipe 46a.
In this embodiment, the hinge 40 is configured to rotate substantially coaxially with the rotation axis L2 of the hinge 40 or to rotate in the vicinity of the rotation axis L2. Is supplied from the inlet 44A of the oil cooler 28 to the upper tank 28a via a rotary joint 50A that rotates coaxially with the rotation axis L2 of the oil cooler 28, and is cooled by the cooling core 28c of the oil cooler 28 and the lower tank 28b.
From the outlet 44B of the oil cooler 28 to the hinge 40
Rotary joint 5 provided coaxially with the rotation axis L2 of
Rotary joint 50B having substantially the same configuration as the rotary joint 50B.
The hydraulic oil is discharged to a hydraulic oil tank via a hydraulic pump, and the hydraulic oil is circulated to a hydraulic circuit of the hydraulic shovel by a hydraulic pump (not shown).

Accordingly, the oil cooler 28 rotates about substantially the same rotation axis of the hinge 40 and the rotary pipe joints 50A and 50B as the second rotation mechanism K2.
Displacement such as torsion of the hydraulic oil pipes 46a and 46b caused by the rotation of the rotation of the hydraulic fluid 8 can be minimized. In addition, the oil cooler 28 of the present invention is provided with rotary pipe joints 50A and 50B for supplying the hydraulic oil and a second rotation mechanism K2, respectively, and the rotation of the oil cooler 28 is reliably and firmly controlled by the second rotation mechanism K2. Keep rotating pipe joints 50A, 5
0B guides so as to follow the fluctuations of the pipes 46a and 46b caused by the rotation of the oil cooler 28 by the second rotation mechanism K2.

The structure in which the hinge 40 and the rotary joints 50A and 50B, which are the second rotary mechanism K2 of the oil cooler 28, are rotated on the same rotation axis, for example, as shown in FIG. A ring groove 50R is provided on the outer circumferential surface of a cylindrical support frame 38 that integrally supports the upper and lower parts 50B so as to have the same rotation axis L2 as the rotary joints 50A and 50B. Since hinges 40 rotatably fitted to 50R and having the other end attached to oil cooler 28 are provided above and below support frame 38, pipes 46a and 46b generated with rotation of oil cooler 28 are provided. The displacement of the oil cooler 28 can be performed smoothly with a minimum displacement.

A support frame 38 for supporting the rotary pipe joints 50A and 50B is mounted on the frame side of the fuselage, and has a concave portion O1 provided on the outer peripheral surface of the inflow port 44A and the outflow port 44B, and pipes 46a and 46b. An O-ring O having a sealing property disposed in a groove formed by the concave portion O2 provided on the inner peripheral surfaces of the rotary fittings 50A and 50B to be fitted.
If the pipes 46a and 46b are configured to be rotatable via R, the rotation of the oil cooler 28 can be further smoothly performed, and deformation of the pipes 46a and 46b and leakage of hydraulic oil can be prevented. it can.

The above-mentioned modified example is different from the first embodiment in that the rotary pipe joints 50A and 50B and the hinges 4 are provided on the upper and lower sides as shown in FIG.
0 is provided integrally with the support frame 38 on substantially the same rotation axis, but is not limited thereto.
As shown in FIG. 7, the rotary joints 50A and 50B and the hinge 40 are disposed on substantially the same rotation axis without the support frame 38, but the rotary joints 50A and 50B and the hinge 40 are separately provided on the upper part. The revolving unit 2 may be attached to the frame F side.

If the rotary pipe joints 50A and 50B and the pipes 46a and 46b are attached to the frame F side of the upper revolving unit 2 by an elastic member or a slidable suspension means, the above rotation of the oil cooler 28 is achieved. In addition to the smooth operation, the vibration and the change in the mounting position during the operation of the construction machine can be absorbed by the elastic member and the suspension means, and damage to the pipes 46a and 46b can be prevented.

Further, in the case of the other modified example shown in FIG.
The rotation axis L2 of 0A and 50B and the rotation axis 40L of the hinge 40 provided vertically are not on the same axis, and the rotation axis L2 of the rotary joints 50A and 50B is near the rotation axis 40L of the hinge 40 provided vertically. In such a case, the displacement generated by the rotation of the oil cooler 28 can be absorbed by the elastic member or the suspension means, and the rotation can be performed smoothly. Vibration during operation and fluctuations in the mounting position can be absorbed by the above-mentioned elastic members and suspension means.
a, 46b etc. can be prevented from being damaged.

Since the present embodiment is formed as described above, the door 10R on the right side of the excavator is first opened as shown in FIG. 3 when the cooling machine 200 is cleaned. However, as shown by the two-dot chain line in FIG. 3, both the left and right doors 10L and 10R are opened as necessary, and the front surface of the intercooler 30 is cleaned with high-pressure air or high-pressure water.

Then, as shown by a two-dot chain line in FIG. 1A, the intercooler 30 is rotated upward about the hinge 32 as a center of rotation, and the side portion of the intercooler 30 is engaged with the engaging portion M1 of the upper cover 2uc of the body. Engaging part M2 provided in
The back of the intercooler 30 and the oil cooler 2
8 is cleaned by blowing high-pressure air or high-pressure water, the oil cooler 28 is connected to the support frame 3 shown in FIGS.
8 is rotated to the left with the hinge 40 as the center of rotation to be in an open state, and is held by appropriately known locking means such as the engaging portions M1 and M2. Blow the back side with high-pressure air or high-pressure water to clean it.

Since the front of the radiator 18 is open and the oil cooler 28 and the intercooler 30 can be opened in the front-rear direction as described above, the rotation of the intercooler 30 and the oil cooler 28 each time it rotates. It is possible to easily perform a cleaning operation in which a cleaner of a cleaning operation stands on the ground beside the excavator and blows high-pressure air or high-pressure water to dust accumulated in each core of the cooler 200 to remove the dust. It is possible to improve the efficiency of the cleaning operation.

In the cleaning operation, as described above, first, the right door 10R is opened as shown in FIG. 3, the intercooler 30 is opened upward, and then the oil cooler 28 is moved in the left and right direction. It is considered that it is preferable from the viewpoint of workability to hold the motor in the open state rotated in one of the directions described above. However, the present invention is not limited to this, and the oil cooler 28 and the intercooler 30 may be upwardly, downwardly, respectively. With the combination of the left and right rotations, substantially the same functions and effects as in the above embodiment can be obtained.

Since the supercharger 36 of the engine 8 is often provided above the engine 8, the intercooler 30 is rotated upward or to the side of the intercooler 30, and the supercooler 36 of the intercooler 30 is moved upward as much as possible. The supply fluid inlet 31A and the outlet 31B are provided, and the pipes connected to the inlet 31A and the outlet 31B are arranged as short as possible and as substantially linearly as possible.
It is desirable that the rotation does not cause deformation or breakage, and that the fluid resistance does not increase as much as possible.

That is, for example, the oil cooler 28 is rotated in the left or right direction by the first rotation mechanism K1 of the intercooler 30 and held in the open state, and then the oil cooler 28 is rotated upward or downward by the second rotation mechanism K2. The cleaning operation may be performed by holding the intercooler 30 and the oil cooler 28 in the vertical direction or the left and right direction, respectively, while holding the intercooler 30 and the oil cooler 28 by the appropriate locking means. The above cleaning work may be performed.

Further, the intercooler 30 and the oil cooler 28 may be rotated in the same direction. In this case, for example, the intercooler 30 is rotated to the left to open, and the rotated intercooler 30 is compressed with high-pressure air or the like. The high-pressure water is blown to remove the dust accumulated on the cooling core 30c as described above. At this time, high-pressure air or high-pressure water is blown to the front of the oil cooler 28 that has not yet been rotated, so that the front side of the oil cooler 28 After cleaning the oil cooler 28, the oil cooler 28 is rotated to the left, an appropriate locking member is provided on the side of the intercooler 30 that has been rotated and opened, and high-pressure air or the like is applied to the back side of the oil cooler 28 and the radiator 18. If the cleaning operation is performed by spraying high-pressure water to remove the dust accumulated on both cores, It is possible to achieve the substantially the same effects of the condition.

If there is a space (not shown), if there is a space, the intercooler 30 and the oil cooler 28 are integrally rotated to one side outside the radiator 18 as shown in FIG. Engagement is performed by appropriate engagement means such as engagement portions M1 and M2, and the front surface of the intercooler 30, the rear surface of the oil cooler 28, the intercooler 30 and the oil cooler 28
From between, the back surface of the intercooler 30 and the front surface of the oil cooler 28 may be cleaned by blowing the high-pressure air or high-pressure water.

After the cleaning of the intercooler 30, the oil cooler 28, and the radiator 18 is completed as described above, the oil cooler 28 and the intercooler 30 are returned to their original positions as shown in FIG. The flange RF2 of the frame provided on the side of the oil cooler 28 is brought into contact with the flange RF of the frame on the 18 side, and the flange IF of the frame of the intercooler 30 is brought into contact with the flange OF1 of the frame of the oil cooler 30. ,
In the present embodiment, the respective abutting portions are attached by wing bolts WB and fastening members such as wing nuts and commonly used bolts and nuts.

If the air cleaner 34 is accommodated in the recess 6a of the counterweight 6 as shown in FIG. 2, the pipe from the air cleaner 34 to the supercharger 34 is less bent. It is possible to prevent the performance of the engine from deteriorating by increasing the fluid resistance by piping substantially linearly, and it is possible to increase the mounting space above the revolving superstructure 2 of the excavator, Not only can the size of the entire hydraulic excavator be made compact, but also the intake of air into the cooler 200 and the air cleaner 34 can be smoothly increased.

[0050]

As described in detail above, according to the structure for improving the cleanability of a cooling machine according to the first, second, third, and fourth aspects of the present invention, the above-mentioned structure mounted on a construction machine is provided. An engine for operating a construction machine, an oil cooler for hydraulic oil disposed in front of a radiator for cooling the engine, and an intercooler for a supercharger for the engine disposed in front of the oil cooler By rotating the oil cooler and the intercooler outward with respect to the radiator by a rotation mechanism, the intercooler, the oil cooler, and the radiator can be easily cleaned.

Further, the first and second members constituting the rotation mechanism
The cooling fluid inlet and outlet of the intercooler and the oil cooler are provided on or near the same rotation axis as the rotation axis of the rotation mechanism, and the cooling fluid inlet and outlet are provided at the cooling fluid inlet and outlet. Since the pipe for the cooling fluid is connected, the rotation of the intercooler and the oil cooler can be performed smoothly, and the pipe is displaced following the displacement generated by the rotation, thereby preventing damage to the pipe. In addition to the above, the efficiency of the cleaning operation can be improved.

The pipe connected to the inflow port and the outflow port of the intercooler is rotated substantially coaxially with the rotation axis of the rotation mechanism, or is rotated near the rotation axis of the rotation mechanism of the oil cooler. Since the rotation is performed through the rotating pipe joint, the pipes of the intercooler and the oil cooler can be prevented from being twisted or damaged at the inflow port and the outflow port.

According to a fifth aspect of the present invention, there is provided the structure for improving the cleanability of a cooler according to any one of the second to fourth aspects, wherein the intercooler is provided on an outer side with respect to the oil cooler. A first rotation mechanism for rotating the oil cooler in any one of a right direction, a left direction, and a right direction. Since it has the second rotation mechanism for rotating in any direction different from the rotation direction, in addition to the effects of any of claims 2 to 4, the intercooler and the oil cooler can be easily rotated. In addition, the cooling cores of the intercooler, oil cooler, and radiator can be easily cleaned, and the cleaning effect and the efficiency of the cleaning operation can be improved.

According to the sixth aspect of the present invention, in the structure for improving cleanability of a cooler according to any one of the second to fourth aspects, the intercooler is disposed on an outer side with respect to the oil cooler. A first rotating mechanism for rotating the oil cooler in any one of the following directions: downward, leftward, rightward, and the oil cooler is opposed to the radiator in a direction opposite to the rotational direction of the intercooler on the outer side. Since the above-described second rotation mechanism is provided, the intercooler and the oil cooler can be easily rotated, and the intercooler, the oil cooler, and the oil cooler can be easily rotated. Each cooling core of the radiator can be easily cleaned, and the above-mentioned cleaning effect and the efficiency of the cleaning operation can be improved.

According to the seventh aspect of the present invention, in the structure for improving cleanability of a cooler according to any one of the second to fourth aspects, the intercooler is disposed on an outer side with respect to the oil cooler. A first rotation mechanism for rotating the oil cooler in any one of the following directions: downward, leftward, rightward, and a second rotation for rotating the oil cooler relative to the radiator in the same direction as the rotational direction of the intercooler. Since the mechanism is provided, in addition to the effects of any of claims 2 to 4, first, the intercooler can be cleaned, and the oil cooler can be rotated to clean the oil cooler and the radiator. The above cleaning work can be easily and easily performed.

According to an eighth aspect of the present invention, there is provided an air cleaner connected to an intercooler for a supercharger of the engine in the structure according to any one of the first to seventh aspects. Is configured so that at least a part thereof is accommodated in a concave portion provided in a counter weight provided in the construction machine. In addition to the effects of any one of claims 1 to 7, the upper turning of the construction machine The mounting space on the upper part of the body can be increased, and not only the size of the entire construction machine can be reduced, but also the intake of air into the cooler and the air cleaner can be smoothly increased.

According to the ninth aspect of the present invention, in the structure of the eighth aspect, the air cleaner is rotatably pivoted on a pivot shaft provided in a recess of the counterweight. It is supported, and at least a part is normally accommodated in the concave portion, and at the time of inspection and maintenance, the pivot shaft is rotated about a rotation center to be exposed to the engine room side so that the element of the air cleaner can be inserted and removed. Therefore, in addition to the effect of the eighth aspect, it is possible to improve the inspection and maintenance of the air cleaner without hindering the introduction of the cooling air into the engine.

According to the tenth aspect of the present invention, a radiator for cooling an engine for operating the construction machine mounted on the construction machine is provided in front of the radiator. An oil cooler for construction machine working oil, an intercooler for an engine supercharger disposed in front of the oil cooler, and a first rotating mechanism for rotating the intercooler outward with respect to the radiator. A second rotation mechanism for rotating the oil cooler outwardly with respect to the radiator, wherein the intercooler is disposed on the outer side with respect to the radiator in an upward, downward, leftward, or rightward direction. The first in either direction
After the core of the intercooler is cleaned by being rotated by a rotating mechanism, the oil cooler is different from the rotation direction of the intercooler among the upward, downward, leftward, and rightward directions on the outer side with respect to the radiator. Since the oil cooler and the radiator core are cleaned by being rotated by the second rotation mechanism in any direction, the intercooler, the oil cooler, and the radiator can be separately cleaned, and easily and efficiently. The above cleaning work can be performed.

According to the eleventh aspect of the present invention, in the configuration of the tenth aspect, the intercooler is arranged such that the intercooler is located outward, upward, downward, and leftward with respect to the radiator. After rotating the intercooler core in one of the right and left directions by the first rotating mechanism to clean the core of the intercooler, the oil cooler is rotated in the same direction as the rotation direction of the intercooler on the outer side with respect to the radiator. The second cooler is rotated by the second rotating mechanism to clean the core of the oil cooler and the radiator. Therefore, in addition to the effect of the tenth aspect, even if the rotational directions of the intercooler and the oil cooler are the same, The above-described intercooler, oil cooler, and radiator can be easily and efficiently cleaned.

According to a twelfth aspect of the present invention, there is provided a method for improving cleanability of a cooler according to the tenth or eleventh aspect, wherein each of the first and second rotation mechanisms is substantially coaxial with the rotation axis. Or the cooling fluid inlets and outlets provided in the intercooler and the oil cooler in the vicinity of the rotation axis, respectively, and the respective cooling fluids connected to the respective inlets and outlets After the cooling device is rotated outward with respect to the radiator by the first and second rotating mechanisms, the intercooler, the oil cooler, and the radiator are cleaned. In addition to the effect of item 10 or 11,
It is possible to reduce the risk of twisting or breakage in the pipes of the intercooler and the oil cooler.

[Brief description of the drawings]

FIG. 1 shows one embodiment of the present invention, and is a schematic explanatory view in a case where a structure for improving cleanability of a cooler of the present invention is applied to a hydraulic shovel, and FIG. FIG. 1B is a schematic explanatory view showing an arrangement part around the machine, and FIG. 1B is a schematic explanatory view showing an intercooler part in FIG.

FIG. 2 is a schematic explanatory view showing a modified example of the piping structure of the cooling fluid outflow / inflow port of the intercooler of FIG. 1 (B).

FIG. 3 is a schematic plan view showing a disposition position of a cooler mounted on a rear portion of the hydraulic excavator shown in FIG.

FIG. 4 is a schematic explanatory view showing a main part of an arrow Y in FIG. 3;

FIG. 5 is a schematic explanatory view showing a plane of a relevant portion of the cooler shown in FIG. 3;

FIG. 6 is a schematic explanatory view in which the hinge and the rotary pipe joint shown in FIG. 4 are arranged on the same rotation axis.

FIG. 7 is a schematic explanatory view showing a modification of the arrangement position of the hinge and the rotary pipe joint shown in FIG.

FIG. 8 is a schematic explanatory view showing a conventional oil cooler tilting mechanism.

FIG. 9 is a schematic explanatory view showing another conventional oil cooler tilting mechanism.

FIG. 10 is a schematic explanatory view showing a cleaning operation in the conventional oil cooler tilting mechanism of FIGS. 5 and 6;

[Explanation of symbols]

 2 Upper revolving unit 4 Operator room 6 Counter weight 8 Engine 10 Opening / closing door 10L, 10R Opening / closing door 12 Hinge 16 Cooling fan 18 Radiator 20 Frame 28 Oil cooler 30 Intercooler 31A Inlet of supercharged fluid of intercooler 31B Inlet of supercharged fluid of intercooler Outlet 32 Hinge 32a Hinge 34 Air cleaner 34d Element 34e Pivot shaft 38 Support frame 40 Hinge 40L Rotation axis 40R Ring 44A Oil cooler hydraulic oil inlet 44B Oil cooler hydraulic oil outlet 50A, 50B Rotary pipe joint 50R Ring groove BK Bracket K1 First rotation mechanism K2 Second rotation mechanism L1, L2 Rotation axis O1, O2 Recess M1, M2 Engagement section

Claims (12)

[Claims] An engine cooling radiator mounted on a construction machine for operating the construction machine, an oil cooler for construction machine working oil disposed in front of the radiator, and disposed in front of the oil cooler. An intercooler for an engine supercharger, and a rotation mechanism for rotating the intercooler and the oil cooler outward with respect to the radiator. 2. A rotating mechanism for rotating the intercooler outward with respect to the radiator, and a second rotating mechanism for rotating the oil cooler outward with respect to the radiator. The structure for improving cleanability of a cooler according to claim 1, further comprising: 3. An inlet and an outlet for a supercharging fluid of the intercooler are provided on or near a rotation axis of a first rotation mechanism of the intercooler, and the inlet and the outlet of the supercharging fluid are provided at the inlet and the outlet of the supercharging fluid. The structure for improving cleanability of a cooling machine according to claim 2, wherein a pipe for supplying and discharging the supercharging fluid is connected. 4. An oil cooler according to claim 1, wherein said hydraulic oil is supplied to an inlet and an outlet of a hydraulic oil of said oil cooler via a rotary pipe joint provided on or near a rotary axis of said second rotary mechanism of said oil cooler. The structure for improving the cleanability of a cooler according to claim 2 or 3, wherein a pipe for supplying and discharging air is connected. 5. The first rotation mechanism for rotating the intercooler in any one of upward, downward, leftward, and rightward directions outward of the oil cooler;
A second rotation mechanism configured to rotate the oil cooler in any one of an upward direction, a downward direction, a left direction, and a right direction on an outer side with respect to the radiator, which is different from a rotation direction of the intercooler. The cleaning property improving structure for a cooler according to any one of claims 2 to 4, characterized in that: 6. A first rotation mechanism for rotating the intercooler in one of upward, downward, leftward, and rightward directions outward of the oil cooler, and the oil cooler includes: 5. The cooling device according to claim 2, further comprising: the second rotation mechanism configured to rotate the radiator in a direction opposite to a rotation direction of the intercooler on an outer side. 6. Machine cleanability improvement structure. 7. A first rotating mechanism for rotating the intercooler in any one of upward, downward, leftward, and rightward directions on the outer side with respect to the oil cooler, and the oil cooler includes: 5. The improvement of the cleanability of the cooler according to claim 2, further comprising the second rotation mechanism configured to rotate the radiator in the same direction as the rotation direction of the intercooler. 6. Construction. 8. An air cleaner connected to the intercooler for the engine supercharger, wherein at least a part of the air cleaner is housed in a recess provided in a counterweight of the construction machine. Item 8. The structure for improving cleanability of a cooler according to any one of Items 1 to 7. 9. The air cleaner is rotatably supported by a pivot shaft provided in a concave portion of the counterweight, and is normally housed at least partially in the concave portion. 9. The structure for improving the cleanability of a cooler according to claim 8, wherein the air cleaner element is rotated around a rotation center and exposed to the engine room side so that the element of the air cleaner can be inserted and removed. 10. A radiator for engine cooling for operating the construction machine mounted on the construction machine, an oil cooler for construction machine working oil disposed in front of the radiator, and a front of the oil cooler. An intercooler for an engine supercharger, a first rotating mechanism for rotating the intercooler outward with respect to the radiator, and a second rotating mechanism for rotating the oil cooler outward with respect to the radiator. A two-rotation mechanism, and the intercooler is mounted on the outer side of the radiator in an upward direction, a downward direction,
After the core of the intercooler is cleaned by being rotated by the first rotating mechanism in one of the left direction and the right direction, the oil cooler is moved upward, downward and outward with respect to the radiator. The oil cooler and the core of the radiator are cleaned by being rotated by the second rotation mechanism in one of a left direction and a right direction different from the rotation direction of the intercooler. How to improve the cleanability of the cooler. 11. The intercooler is rotated by the first rotating mechanism in any one of upward, downward, leftward, and rightward directions outward of the radiator to clean the core of the intercooler. Then, the oil cooler is rotated by the second rotation mechanism in the same direction as the rotation direction of the intercooler on the outer side with respect to the radiator to clean the oil cooler and the core of the radiator. The method for improving cleanability of a cooler according to claim 10, wherein: 12. An inlet and a flow of a cooling fluid provided in each of the coolers of the intercooler and the oil cooler substantially on or near the rotation axis of each of the first and second rotation mechanisms. An outlet, and a pipe for the respective cooling fluid connected to the respective inlet and outlet. The cooler is moved outward with respect to the radiator by the first and second rotating mechanisms. After rotating,
12. The apparatus according to claim 10, wherein the intercooler, the oil cooler, and the radiator are cleaned.
The method for improving the cleanability of a cooler as described in the above.