JP2001064996A - Cooling structure of construction machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the cooling performance of an engine and improve the maintenance by facilitating the attachment and detachment of the element of the air suction cleaner of the engine of a construction machine, an agriculture or the like (hereafter, simply referred to as a construction machine) such as a hydraulic shovel, a self loader, a bulldozer, a wheel loader and a crawler loader in relation to the cooling structure of the construction machine. SOLUTION: The element 38 of an air cleaner 32 for an engine 8 provided frontward of at least any one cooler of a radiator 18 and an oil cooler 22 for working oil provided in the front side of the engine 8 mounted on an construction machine is provided so as to easily exchange it. A partition wall 4a partitioned between the radiator 18 and the oil cooler 22 is provided in the intake side of the cooling air of the front side of the radiator 18 and the oil cooler 22, and the intake of the cooling air can be facilitated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooling structure for a construction machine such as a hydraulic shovel, a self-loader, a bulldozer, a wheel loader, a crawler-type loader, an agricultural machine, and the like (hereinafter, simply referred to as a construction machine). .

[0002]

2. Description of the Related Art Construction machines such as hydraulic excavators, self-loaders, bulldozers, wheel loaders, and track-type loaders are known as:
As is well known, it is used for excavating rocks such as dams, tunnels, rivers, and roads in mountainous areas, and breaking down buildings and buildings. The structure of the construction machine includes, for example, a hydraulic excavator including a lower traveling body 1 and upper revolving bodies 2 and 2 that are pivotally disposed above the lower traveling body 1 as shown in FIG. 3 of the working devices 6 provided to perform various works
It consists of two parts.

The revolving superstructure 2 comprises an engine 8, a hydraulic device (not shown), a revolving device, an operator room 10 and the like in addition to the working device 6, and covers the outer peripheral side of the revolving superstructure 2. It is composed of a side cover 2sc, an upper cover 2uc that covers the outer periphery of the upper swing body 2, an engine hood 17, and the like. The lower traveling body 1 is composed of a car body, a track roller frame, a traveling device, and a suspension device (not shown), and the working device 6 further operates a boom and an arm for supporting a bucket (not shown). Composed of various hydraulic cylinders and link rods,
And it is comprised of the above-mentioned turning device, traveling device and the like.

An engine 8 having a hydraulic pump 16 connected to the front side of the counterweight 14 is disposed horizontally between a counterweight 14 provided at the rear of the excavator and the operator room 10. A first cooling fan 20 driven by the engine 8 for cooling the radiator 18 is connected to a front side of the engine 8. Also, FIG.
As shown in FIG. 0, an oil cooler 22 for cooling hydraulic oil of the hydraulic excavator between the counter weight 14 and the operator room 10, a second cooling fan 24 for cooling the oil cooler 22, and a second cooling. A hydraulic motor that drives the fan 24 is provided.

[0005] A partition wall W4d for separating the radiator 18 and the oil cooler 22 is provided, and the radiator 18 and the oil cooler 22 are provided with first and second cooling fans, respectively. The operation of the hydraulic excavator is performed by the lower traveling body 1, the upper revolving superstructure 2, and the working device 6, and the power transmission is performed by converting the power of the engine 8 into hydraulic pressure by the hydraulic pump 16.

Then, for example, about 200 to 350 kg discharged by the hydraulic pump 16 driven by the engine 8
/ Cm hydraulic fluid is supplied to the control valve 28
And is transmitted to each of the above-described devices to become low-pressure oil, returns to the hydraulic oil tank 30 again via the control valve 28, and is circulated again by the hydraulic pump 16 to perform the operation of the hydraulic shovel.

On the other hand, the air cleaner 32 for intake to the engine 8 is determined by the size of the engine 8 and the design specifications of the construction machine, but has a considerably large shape. For example, the above air cleaner 32
Is a cylinder disposed so as to be able to be inserted and removed substantially coaxially with a casing 34 constituting a cylindrical casing 34 and an outer air layer 36 for taking in outside air with an interval from the inner peripheral surface of the casing 34. Element 38 of the air cleaner 32 in a shape of
And an intake hose 42 having one end connected to the intake layer 40 of the cooling air obtained by filtering the outside air by the element 38 and the other end connected to the intake pipe of the engine 8.

The casing 34 serving as the main body of the air cleaner 32 is formed in a cylindrical shape having a length of about 400 to 500 mm when the diameter is about 350 mm, for example. Such an air cleaner 32 is connected to the engine 8
Is provided on the upper part of the hydraulic excavator when the maintenance and inspection such as replacement of the element 38 are performed.
It is not easy to work in high places where the footing is poor.

Therefore, the position of the air cleaner 32 of the conventional device is provided, for example, as shown in FIG. 10, by providing a space V1 between the radiator 18 and the oil cooler 22 where a casing 34 having a diameter of about 350 mm can be disposed. In addition, it is provided so as to be at an eye height position assuming a mechanic of average height. Further, as shown in FIG. 10, hinges 4 are provided on the operator room 10 side and the counter weight 14 side.
6 and 48, the left side cover 2s of the excavator is pivotally supported so that each can be opened and closed in a double door.
c is constituted by doors D1 and D2.

At the time of the above maintenance check, the technician
1, D2 is opened and the casing is provided by engaging / disengaging means 35 such as clips and thumb screws, which are provided between the side lid 50 of the air cleaner 32 and the casing 34 from the ground and which are not shown in detail but which can be detached. The side cover 50 is detached from the main body 34 so that the element 38 can be easily replaced in the direction of the arrow P shown in FIG.

[0011]

However, in order to reduce the noise of the construction machine and the emission control of the engine 8, the emission of nitrogen oxides and the like is reduced. Since the exhaust gas temperature rises until the later stage, the cooling loss of the engine increases and the temperature of the cooling water of the engine 8 rises as compared with the related art, so that the radiator 18 It is necessary to improve the cooling performance.

In order to increase the size of the radiator 18, the above-described air cleaner 32 hinders the installation of the large radiator 18. That is, when the large radiator 18 as described above is disposed, and the air cleaner 32 and the oil cooler 22 are disposed, the length of the upper revolving unit 2 in the front-rear direction becomes longer, so that the turning radius becomes longer and work on a narrow construction site is performed. And the work area is restricted.

If the radiator 18 is extended downward, the ground height of the hydraulic excavator becomes too low, and the debris of reinforced concrete steel frames and rocks and large trees at the construction sites such as tunnels and dams when the building is dismantled enter the hydraulic excavator. The shovel cannot be easily extended downwards, as it could lift the floor. Further, if the radiator 18 is extended upward, the rear view becomes poor, and the center of gravity of the hydraulic excavator may become unstable and unstable.

On the other hand, when the core layer of the radiator 18 is made thick to increase the amount of cooling water, not only the flow resistance of the cooling air increases, but also the length in the vehicle width direction increases, and the vehicle width regulation according to the Road Traffic Act is required. This would be a violation, and the truck would not be able to carry the hydraulic excavator on ordinary roads for transportation. The present invention has been made in view of these problems, and is provided in front of one of a radiator and an oil cooler for hydraulic oil disposed in front of an engine mounted on a construction machine. An object of the present invention is to provide a cooling structure for a construction machine configured so that an element of an air cleaner can be easily replaced.

[0015]

According to a first aspect of the present invention, there is provided a cooling structure for a construction machine according to the present invention, comprising: an operator room disposed on one side of a front end of the construction machine in the front-rear direction; An engine to which a hydraulic pump disposed between a counter weight provided at the rear of the machine and the operator room is connected, an engine room for accommodating the engine so as to be surrounded, and an engine room connected to the engine A first pump of a hydraulic pump chamber of the hydraulic pump, at least one of a radiator for cooling water of the engine and a cooler of an oil cooler for hydraulic oil of the construction machine, and the first cooler Cooling fan for cooling the first cooling fan, first driving means for driving the first cooling fan, and cooling of the radiator and the oil cooler arranged in parallel with the first cooling machine. A second cooling device for cooling at least one of the second cooling device, a second cooling fan for cooling the second cooling device, a second driving unit for driving the second cooling fan, the first cooling device, A partition wall provided between the first cooler and the second cooler provided on a cooling air intake side in front of the second cooler, and at least one of the first and second coolers; The air cleaner is provided with an air cleaner for intake of the engine, which is provided on a front side of one of the coolers and is provided so that an element of the air cleaner can be inserted and removed.

According to a second aspect of the present invention, there is provided a cooling structure for a construction machine according to the present invention, comprising: an operator room disposed on one side of a front end of the construction machine in a front-rear direction; and a counterweight provided at a rear portion of the construction machine. An engine to which a hydraulic pump horizontally disposed between the engine room and the engine room is connected, an engine room for accommodating the engine so as to be surrounded, and a hydraulic pump of the hydraulic pump connected to the engine A first chiller of a chamber, at least one of a radiator for cooling water of the engine and a cooler of an oil cooler for hydraulic oil of the construction machine, and a first cooling unit for cooling the first cooling machine A fan, first driving means for driving the first cooling fan, and at least one of the radiator and oil cooler coolers arranged in parallel with the first cooler. A second cooling device of the other one also,
A second cooling fan for cooling the second cooler;
Second drive means for driving a cooling fan; and a partition for separating between the first and second coolers provided on the cooling air intake side in front of the first and second coolers. A wall, and the air cleaner for intake of the engine, which is provided on a front side of at least one of the first and second coolers and is provided so that an element of the air cleaner can be inserted and removed. A configuration in which heated air in the hydraulic pump chamber is ventilated to air outside the hydraulic pump chamber by a fluid flow of cooling air taken in by the second cooling fan and cooling the second cooler. Features.

According to a third aspect of the present invention, there is provided a cooling structure for a construction machine, comprising: an operator room disposed at one side of a front end of the construction machine in a front-rear direction; and a counterweight provided at a rear portion of the construction machine. An engine to which a hydraulic pump horizontally disposed between the engine room and the engine room is connected, an engine room for accommodating the engine so as to be surrounded, and a hydraulic pump of the hydraulic pump connected to the engine At least one of a fuel tank and a hydraulic oil tank arranged on the other side of the chamber opposite to the one side and arranged at an interval on the opening side of the hydraulic pump chamber. A radiator for cooling water of the engine and / or a cooler for an oil cooler for hydraulic oil of the construction machine. A cooling device, a first cooling fan for cooling the first cooling device, first driving means for driving the first cooling fan, and the cooling device disposed between the first cooling device and the operator room. A second cooler of at least one of the radiator and the oil cooler cooler, a second cooling fan that cools the second cooler, and a second drive unit that drives the second cooling fan; The first of the above
A partition wall provided between the first cooler and the second cooler, which is provided on a cooling air intake side in front of the cooler and the second cooler; and a partition wall of the first and second coolers. An air cleaner provided at the front side of at least one of the coolers and provided to allow an element of the air cleaner to be inserted and removed, and an air cleaner for intake of the engine, the second cooler being taken in by the second cooling fan. The apparatus is characterized in that heated air in the hydraulic pump chamber is ventilated to air outside the hydraulic pump chamber by a fluid flow of cooled cooling air.

According to a fourth aspect of the present invention, there is provided a cooling structure for a construction machine according to any one of the first to third aspects, wherein the cooling structure includes a concave portion provided on a load mounted on the construction machine. An air cleaner for intake of the engine arranged so as to at least partially enter the recess, wherein an element of the air cleaner can be inserted and removed from the recess.

According to a fifth aspect of the present invention, there is provided a cooling structure for a construction machine, wherein
At least a part of the air cleaner is provided in the recess, and a movable means provided so that an insertion opening of an element of the air cleaner can be moved at least to a position where the element can be inserted and removed at the time of maintenance, so that insertion and removal of the element can be facilitated. It is characterized by being constituted.

According to a sixth aspect of the present invention, in the construction machine cooling structure according to the fourth or fifth aspect, the air cleaner is divided into a plurality of air cleaners, and at least one of the plurality of divided air cleaners is provided. It is characterized in that one of them is arranged in the concave portion of the load. According to a seventh aspect of the present invention, there is provided a cooling structure for a construction machine according to any one of the first to third and sixth aspects, wherein at least a part of the air cleaner is provided with the first cooler and the first cooler during normal use. The first cooler and the second cooler are disposed at a position below a lower portion of at least one of the coolers or at a position adjacent to the first cooler and the second cooler. The air cleaner has a movable means provided so that an insertion opening of the element of the air cleaner can move at least into the cooling air passage, so that insertion and removal of the element are facilitated.

According to an eighth aspect of the present invention, there is provided a cooling structure for a construction machine according to any one of the first through third and seventh aspects, wherein the intake hose from the air cleaner to the intake side on the engine side is connected to the intake hose. Is provided so as to pass between the first cooler and the second cooler. The cooling structure for a construction machine according to the ninth aspect of the present invention is the first aspect.
In the configuration according to any one of (1) to (3), the intake air of the engine provided along the front-rear direction on the front side of at least one of the first cooler and the second cooler. Air cleaner, and an air cleaner provided under the at least one of the first cooler and the second cooler, and connected from the air cleaner to an intake side on the engine side. And an intake hose, wherein the element of the air cleaner can be inserted and removed.

According to a tenth aspect of the present invention, there is provided a cooling structure for a construction machine according to any one of the second, third, fourth, sixth, seventh and ninth aspects, wherein the first cooler is cooled. The cooling air is discharged from a cooling air outlet provided above the engine room after cooling the engine, and the cooling air that has cooled the second cooler is provided on a front side or a side upper side of the construction machine. It is characterized in that it is configured to be discharged to at least one side.

According to an eleventh aspect of the present invention, there is provided a cooling structure for a construction machine according to any one of the first to fourth and tenth aspects, wherein the intercooler for a supercharger provided in the engine is provided with the intercooler. The first cooling device and the second cooling device are provided together with one of the first cooling device and the second cooling device. The cooling structure for a construction machine according to the present invention according to claim 12,
The configuration according to any one of claims 3, 4, 5, 10, and 11, wherein the one side is disposed behind the operator room or the other side opposite to the one side. The construction machine is mounted on at least one of the fuel tank and the hydraulic oil tank and at least one of the tanks facing the flow of cooling air that has cooled the second cooler. And a guiding means for guiding the cooling air to at least one of the upper side and the front side of the side.

[0024]

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 plan view showing a case where a cooling structure of a construction machine according to the present invention is applied to a hydraulic shovel. FIG. FIG. 3 is a schematic explanatory view showing an application example of FIG. 1, FIG. 4 is a side view of FIG. 3, and FIG.
FIG. 4B is a schematic explanatory view showing a main part of arrow 4Y of FIG.
FIG. 5A is a schematic explanatory view showing a modification of FIG. 1, FIG. 5 is a schematic explanatory view showing another application example of FIG. 1, FIG. 6 is a side view of FIG. 5, and FIG. FIG. 6B is a schematic explanatory view showing a main part of 6Y, FIG. 7B is a schematic explanatory view showing a modification of FIG. 6A, FIG. 7 is a schematic explanatory view showing a cross section taken along line 7A-7A in FIG.
FIG. 8 is a schematic perspective view of a hydraulic shovel showing a flow of cooling air of the radiator and the oil cooler of FIG. 1, and FIG. 9 is a schematic explanatory view showing a modification of FIG.

In the above-described hydraulic excavator, as shown in FIG. 1, an upper traveling body 2 is rotatably mounted on a lower traveling body 1, and a hydraulic pump driven by an engine 8 having the hydraulic excavator mounted thereon. High pressure hydraulic fluid from 16
An oil cooler 22 that transmits the hydraulic excavator to the lower traveling unit 1, the upper revolving unit 2, and the working device 6 and cools the returned high-temperature hydraulic oil and a radiator 18 that cools the cooling water of the engine 8 And a cooling device for the hydraulic shovel comprising:

An operator room 10 is provided at one side of the front end 1a of the excavator in the front-rear direction, and is provided between a counter weight 14 provided at the rear of the excavator and the operator room 10. The engine 8 is disposed horizontally and connected to a hydraulic pump 16. Further, a first chiller of one of a radiator 18 for cooling water of the engine 8 and a cooler of an oil cooler 22 for hydraulic oil of the hydraulic shovel is provided on a front side of the engine 8. A radiator 18 is provided.

A first cooling fan 20 for cooling the radiator 18 and a first driving means 21 constituted by any one of a hydraulic motor, an electric motor, and the engine for driving the first cooling fan 20 are provided. However, in the present embodiment, it is configured to be driven by the engine 8. In addition, between the rear part of the operator room 10 and the radiator 18 or the first cooling fan 20, an oil cooler 22 which is the other of the radiator 18 and the oil cooler 22, and an oil cooler 22. A second cooling fan 24 for cooling the cooler 22; a second driving means 2 including any one of a hydraulic motor, an electric motor, and the engine for driving the second cooling fan 24;
6, and is driven by a hydraulic motor in this embodiment.

Also, as shown in FIG.
A seal cover K5 is provided between a rear portion of the oil cooler 22 and a side portion of the oil cooler 22 via a partition plate W5.
Seal covers K3 and K4 are provided between the R and the side of the oil cooler 22 via partition plates W3 and W4, and the partition plate W4 extends to the side cover 2sc of the hydraulic shovel. A partition W4a between the oil cooler 22 and the oil cooler 22 is formed.

Further, seal covers K1 and K2 are provided between the front side partition Wfb and the rear side partition Wrb and both sides of the radiator 18 in the longitudinal direction of the construction machine, as shown in FIG. Partition wall W4a is radiator 18
And a duct member for taking in the cooling air that separates the cooling air inlet at the front side of the oil cooler 22.

By dividing the cooling air passage s of the radiator 18 and the oil cooler 22 by the partition wall W4a and forming the respective cooling air passages, the amount of cooling air to each of the radiator 18 and the oil cooler 22 is influenced by each other. It can be secured without hurting,
The cooling of each of the radiator 18 and the oil cooler 22 can be performed freely by changing the respective capacities of the radiator 18 and the oil cooler 22 effectively.

Further, the partition wall W4a, the seal cover K
1 to K5 have a sealing effect for preventing hot air discharged to the downstream side of the radiator 18 and the oil cooler 22 from being rewinded to the upstream side through the gap between the above members, For example, it is formed of a heat-resistant flexible elastic material having a high sealing effect, such as urethane foam, sponge, and rubber.

Also, as shown in FIG. 1, a concave portion 80 provided on a load to be described later, which is disposed on the hydraulic excavator near the radiator 18 which is one of the coolers, and has a small number of concave portions. And an air cleaner 32 for intake of the engine 8 which is arranged so as to partially enter the air cleaner 32, and the element 38 of the air cleaner 32 can be inserted and removed from the recess 80.

Further, the air cleaner 32 is constructed so as to be able to enter and exit the recess 80 or to be detachable, so as to block the cooling air passage (introduction passage) s of the cooler during normal use so that the flow resistance does not increase. I am. In this embodiment, as shown in FIGS. 1 and 2, the load is constituted by the counterweight 14 of the hydraulic shovel, and the air cleaner 32 is disposed in a recess 80 provided in the counterweight 14. .

The load is not limited to the counterweight 14, but as shown in FIGS. 1 and 2, for example, a fuel tank 31, a hydraulic oil tank 30, an operator room 10, Alternatively, a dead space that can be formed by the arrangement structure of the excavator, for example, a frame or a floor plate of the floor structure of the excavator can be applied, and the concave portion 80 is provided in any of the above-mentioned mounted articles. Thus, even if the air cleaner 32 is provided as described above, the same operation and effect as described above can be obtained.

Next, the structure for mounting the air cleaner 32 in the recess 80 provided in the counterweight 14 will be described. In the recess 80, the air cleaner 32 is moved as shown in FIGS. The movable means H is provided with a movable plate 76 pivotally supported by a shaft 74 in the recess 80 of the counterweight 14 and configured to be able to enter and exit the recess 80, and is not shown. The air cleaner 32 is attached to the moving plate 76 by appropriate fixing means.

In normal use, the movable plate H is rotated by the movable means H about the shaft 74 so that at least a part of the air cleaner 32 is disposed in the recess 80, and maintenance such as replacement of the element 38 is performed. At the time of inspection, the insertion and removal opening of the element 38 of the air cleaner 32 is, for example, at least the element 38 in the cooling air passage s.
It is configured so that it can be easily replaced by moving it to a site where it can be easily extracted.

The movable means H is not always necessary. If the element 38 can be inserted and removed with the air cleaner 32 housed in the recess 80,
It is not necessary to provide the movable means H. Then, the intake hose 42 connected from the air cleaner 32 arranged as described above to the engine 8 is arranged in the counter weight 14 so that the flow resistance of the cooling air is not reduced.
Further, the cooling efficiency can be improved.

In addition, the above-mentioned air cleaner 32 is
For example, the counter weight 14 may be divided into two parts and arranged in two stages in the vertical direction in the counter weight 14 as shown in FIG.
The divided air cleaners 32 may be disposed at both ends of the counter weight 14 in the vehicle width direction as shown in FIG.

One of the divided air cleaners 32 is disposed in the recess 80 of the counterweight 14 as described above, and the other divided air cleaner 32 is provided as shown in FIGS. In this embodiment, at least one of the two coolers may be provided on the front side of the radiator 18 in the front-rear direction of the upper hydraulic excavator.

The intake hose 42 connecting the divided air cleaner 32 disposed on the front side of the first cooler and the intake side of the engine 8 is connected to the oil cooler 22 as shown in FIGS. And a seal cover K3 provided in a gap between the front cover Wfb and the front side partition wall Wfb described later. In this case, the gap between the radiator 18 and the oil cooler 22 only needs to have a width capable of penetrating the intake hose 42. For example, the gap of the conventional structure described with reference to FIG. About 3
Since the length of the diameter of the intake hose 42 of the divided and miniaturized air cleaner 32 becomes smaller than 50 mm, for example, it is sufficient that the diameter is about 120 to 150 mm, the width of the radiator 18 can be increased by about 200 to 230 mm. And cooling efficiency can be improved.

As shown in FIG. 4 (B), a hinge 74 is provided on a floor, a reinforcing member or the like below the space between the side skirt 70 and the radiator support 72 for supporting the lower part of the radiator 18 so as to be vertically movable. Movable plate 7 mounted via
6, an air cleaner 32 can be provided. At this time, at the time of normal use, if at least a part of the air cleaner 32 is disposed at a position of the dead space below the lower tank 18a of the radiator 18, the radiator 18 and the air cleaner 32 are less likely to be superimposed.
The effective cooling surface area of the radiator 18 which has been increased can be effectively used without reducing the effective cooling surface area of the radiator 18, and the cooling performance can be improved.

Also, at the time of maintenance and inspection such as replacement of the element 38, the movable plate 7 as shown by a two-dot chain line in FIG.
6 is pivoted upward about a hinge 74 so that the element 3
8 can be inserted and removed in the direction of arrow Q and can be easily replaced, so that maintainability can be improved. Furthermore, if the intake hose 42 of the other divided air cleaner 32 disposed on the front side of the radiator 18 as described above is disposed so as to penetrate, for example, the radiator support 72 that supports the lower portion of the radiator 18, As shown in FIG. 5 to FIG. 7, the gap between the oil cooler 22 and the radiator 18 can be further narrowed.
8, the effective cooling surface area can be further increased, so that the cooling effect can be further improved in combination with one of the divided air cleaners 32 arranged on the counterweight 14.

As described with reference to FIGS. 3 and 5, not only is the effective cooling surface area increased to improve the cooling efficiency of the radiator 18, but also the air cleaner 32 is mounted on the radiator 1.
8, the doors D1 and D2 on the side of the upper revolving unit 2 are appropriately opened by being disposed substantially horizontally in the front-rear direction of the hydraulic excavator, and this type of device is usually provided with a clip, a thumb screw or the like. The side cover 50 is opened by the used opening / closing means 35, and the element 38 of the air cleaner 32 is easily inserted and removed in the direction of arrow Q in FIG. 1 to easily perform replacement. The element 38 can be easily inserted into and removed from the casing 34 of the air cooler 32 by the procedure.

As shown in FIG. 6B, the floor below the space (recess 80) between the side skirt 70 and the radiator support 72 for supporting the lower part of the radiator 18,
Even when the air cleaner 32 is attached to the movable plate 76 which is attached to a reinforcing member or the like via the hinge 74 so as to be able to move up and down, the same operation and effect as the above embodiment can be obtained.

At this time, during normal use, the air cleaner 3
If at least a portion of the radiator 18 is disposed below the upper portion of the lower tank 18a of the radiator 18, polymerization of the radiator 18 and the air cleaner 32 is reduced, so that the effective cooling surface area of the radiator 18 is not reduced. All of the increased surface area can be used effectively, and the radiator 18 is expanded in the width direction by an amount corresponding to the reduction in the gap between the radiator 18 and the oil cooler 22, thereby reducing the cooling capacity of the cooler. As a result, the cooling performance can be improved.

During maintenance and inspection such as replacement of the element 38, the movable plate 7 is provided as shown by a two-dot chain line in FIG.
Since the element 6 can be rotated upward about the hinge 74 as shown by the arrow V, the element 40 can be inserted and removed in the direction of arrow Q and can be easily replaced, so that there is an advantage that the maintainability is extremely improved. Further, as shown by a two-dot chain line in FIG. 6B, the air cleaner 32 is disposed at a position adjacent to the radiator 18 and the oil cooler 22 so as to straddle the oil cooler 22 and the radiator 18. The cooler 22 and the radiator 18 may be arranged so that the effective cooling surface area is not reduced as much as possible.

In the above embodiment, the radiator 18 as the first cooling machine is disposed in front of the engine 8 and the oil cooler 22 is disposed between the operator room 10 and the radiator 18. However, the present invention is not limited to this.
The oil cooler 22 is disposed in front of the
The radiator 18 may be disposed between the oil cooler 22 and the oil cooler 22.

In the above embodiment, the case where the oil cooler 22 is disposed between the operator room 10 and the radiator 18 has been described. However, instead of the oil cooler 22, a hydraulic oil tank 30 or a fuel tank 31 is disposed. Even in such a case, even when the engine 8 is disposed in the opposite direction to the left and right, substantially the same operation and effect as the above embodiment can be obtained. A fuel tank 31 and a hydraulic oil tank 3 are arranged on the other side b opposite to the one side 1a in the front-rear direction of the excavator.
0 is provided.

Also, as shown in FIGS. 1, 3, and 5, a rear partition Wc for isolating between the engine 8 and the hydraulic pump 16 is provided.
And a partition plate W extending in the front-rear direction from both sides of the radiator 18 in the front-rear direction of the hydraulic excavator.
1, W2 are provided. Also, a front side partition Wf extending from the side of the front rear partition Wc in the front direction of the construction machine to the partition plate W1 attached to the side of the radiator 18.
b, the rear side partition Wrb and the rear partition Wc extending from the side surface of the rear partition Wc to the partition plate W2 attached to the side of the radiator 18 to form the first cooling fan 2.
0, an engine room ER surrounding the engine 8 is provided, and the engine room ER is configured to block high heat and noise from the radiator 18, the first cooling fan 20, and the engine 8 as much as possible.

In the case of the present embodiment, the rear side partition Wrb also serves as the front surface of the counterweight 14.
As shown by the solid line in FIGS. 1, 3, and 5, the oil cooler 22 is disposed between the oil cooler 22 and at least one of the hydraulic oil tank 30 and the fuel tank 31 in the present embodiment. The control valve 28 for hydraulic oil is provided on the front side of the front side partition wall Wfb of the engine room ER between the fuel tank 22 and the hydraulic oil tank 30.

An engine hood 17 is provided on the upper side of the engine room ER, and the right side of the engine hood 17 is provided with a first hood 17 as shown in FIGS. 1, 3, 5, 8, and 9. A cooling air outlet 60 is provided for discharging the cooling air sucked by the cooling fan 20 and cooling the radiator 18 and the engine 8, and an exhaust pipe 62 projecting from an exhaust muffler M of the engine 8 is provided.

The radiator 18 and the oil cooler 22 of the upper cover 2uc of the upper revolving unit 2 are located on the front side of FIG.
As shown in FIGS. 3, 5, 8, and 9, the cooling air intakes 64a, 64 for taking in cooling air from above, respectively.
4b, and if necessary, a cooling air inlet 64c is provided on the left side 17a of the engine hood 17 as shown in FIGS.

As shown in FIGS. 8 and 9, the upper cover 2 uc covering the upper part of the oil cooler 22, the second cooling fan 24, and the second driving means 26 and the upper part of the hydraulic oil tank 30 are bridged. If the center upper cover 2uc is provided, and the center upper cover 2uc is provided with a cooling air outlet 60a as shown in FIG. 9 and the cooling air is discharged as shown by an arrow Z6, the above cooling is further achieved. The effect can be improved.

When the hydraulic excavator operates as shown in FIGS. 8 and 9, the cooling air inlet 64b partitioned by the partition wall W4 efficiently operates without being affected by the suction force of the second cooling fan. Cooling air enters, arrow Z1 and arrow Z2
After cooling the radiator 18 and the engine 8 as shown in FIG.
The cooling air enters from the independent cooling air inlet 64a partitioned by the partition wall W4a from above to below as shown by arrow Z4, cools the oil cooler 22, and then cools down by the arrow Z4.
5, Z6 flows forward of the hydraulic excavator and is discharged while cooling the hydraulic oil tank 31 and the fuel tank 30.

As shown in FIG. 1, a rear partition Wc separating the engine 8 from the hydraulic pump 16, a right side portion 2sc of the upper swing body 2 of the hydraulic excavator and a rear partition Wc.
, A lower cover 2rc for closing a lower opening between the rear partition Wc and the right side 2sc, and a hydraulic pump surrounded by a front surface of the counterweight 14. A room PR is provided adjacent to the engine room ER.

Also, as shown in FIG. 1, at least one of the fuel tank 31 and the hydraulic oil tank 30 disposed on the other side 1b opposite to the one side 1a is connected to the other side. Is provided so as to oppose the flow of cooling air that has cooled the oil cooler 22 as the second cooler. As shown in FIGS. 1, 3, 5, 8, and 9, the right side 2sc of the hydraulic pump chamber PR, the rear partition Wc, the upper cover 2uc, and the lower cover 2rc are provided. ,
The hydraulic oil tank 3 disposed at an opening corresponding to the hydraulic oil tank 30 formed by being surrounded by the front surface of the counter weight 14 with a gap set by design specifications.
The hydraulic pump chamber PR is formed by disposing, for example, a hydraulic oil tank 30, which is one of the tanks 0 and the fuel tank 31.

Then, a second cooling fan 24 for cooling the oil cooler 22 provided outside the engine room ER
The cooling air flow that cools the oil cooler 22 and that is taken in by the cooling air ventilates the heated air in the hydraulic pump chamber PR with the air outside the hydraulic pump chamber to be cooled. That is, as shown in FIG. 1, the hydraulic pump chamber PR is provided on the right side cover 2sc and the upper cover 2uc of the hydraulic shovel to discharge the hydraulic pump chamber PR of the conventional example shown in FIG. Exit opening 4
Since there is no zero, the hydraulic pump 16 is substantially sealed by the outer wall of the upper revolving unit 2 by the cooperation of the right side cover 2sc, the upper cover 2uc, the front surface of the counterweight 14, and the like. The atmosphere fluid in the inside is filled with an opening 6 provided in the upper cover 2uc as shown in FIGS.
The cooling air is taken in from arrows 4a and 64b as shown by arrows Z1 and Z2, cools the radiator 18, the engine 8 and the engine room ER, and flows from the cooling air outlet 60 of the engine room ER as shown by arrow Z3.

The cooling air pressure of the cooling air that has cooled the oil cooler 22 hits at least one of the hydraulic oil tank 30 and the fuel tank 31 and flows in the front or side direction of the hydraulic excavator. 30,
A part of the cooling air enters the hydraulic pump chamber PR and the heated air in the hydraulic pump chamber PR is ventilated with the air outside the hydraulic pump chamber PR by the cooling air.

That is, outside air enters through a gap that can be naturally formed in the configuration of the hydraulic pump chamber PR, and the hydraulic pump chamber PR
The cooling air heated in the inside is ventilated with the outside air through the naturally formed gap. Further, at least one of the side walls of the hydraulic pump chamber PR is opened, and in the present embodiment, the front side wall is opened, and the gap P between the opened front side wall and the hydraulic oil tank 30 is opened.
By S, the cooling air heated in the hydraulic pump chamber is ventilated to the outside air to cool the hydraulic pump chamber PR.

Further, at least one of the fuel tank 31 and the hydraulic oil tank 30 provided on the other side 1b opposite to the one side 1a, and the oil cooler 2
The surface shape of the one tank on the side facing the flow of the cooling air that has cooled the cooling tank 2 is shown by a two-dot chain line in FIG.
A guiding means R for guiding the cooling air to at least one of the upper side and the front side of the construction machine, such as R1, R2, is provided to improve the efficiency of discharging the cooling air. You can do it.

That is, as shown in FIG. 8, the guiding means R of the present embodiment is constituted by a guiding surface R1 inclined upward from the lower part in the hydraulic oil tank 30, and a guiding surface R1 inclined forward from the rear in the fuel tank 31. Although it is constituted by the surface R2, the present invention is not limited to this. For example, the guide surfaces R1 and R2 may be appropriately provided in both the tanks, or the guide surfaces R1 and R2 may be provided.
R2 may be formed in a shape in which the guiding surfaces R1 and R2 are superimposed on one surface of the tank.

Further, even if the guide surfaces G1 and G2 are formed as separate members separately from the surface portion on the side of the tank, the same function and effect as described above can be obtained. At this time, as shown in FIGS. 1, 3 and 5, since there is no opening in the right rear side cover 2sc and the upper cover 2uc of the excavator, the side cover 2sc, the upper cover 2uc, and the lower cover 2rc. A hydraulic pump chamber PR is formed so as to be surrounded by a hydraulic pump 16 configured such that the front side of the hydraulic shovel is opened by cooperation of the front surface of the counter weight 14 and the hydraulic fluid in the hydraulic pump chamber PR. Cools the oil cooler 22, and as shown in FIGS.
5, the cooling air fluid flowing in the direction of Z6, through the gap PS between the hydraulic oil tank 30 and the front side partition Wfb, is also actively sucked and discharged by the so-called Venturi action, and the ventilation is performed. , Hydraulic pump room P
The rise in the temperature of R can be prevented.

Since the hydraulic pump chamber PR has at least the outer wall of the hydraulic excavator substantially sealed, the noise of the operation of the hydraulic pump 16 can be cut off. or,
If the cooling air outlet 60a is provided in the center upper cover 2uc as in the modification shown in FIG. 9 and the cooling air is discharged in the direction of arrow Z6, the cooling effect can be improved.

When the cooling air is insufficient, as shown in FIG. 9, the side cover 2sc and the door AD of the hydraulic excavator are used.
If cooling air inlets 64d and 64e are provided in D1 and D2,
Although the noise increases, the cooling effect can be further improved. In addition, the intake structure of the engine of the present invention is not limited to the above-described embodiment, regardless of the presence or absence of the engine room ER, as shown in FIGS. Further, even in the above-described various types of arrangement of the cooler, the air cleaner 32 is arranged so that at least a part thereof enters a dead space such as the concave portion 80 provided in the mounted object, thereby obtaining the engine room. The ER and the mounting area of the construction machine can be increased to reduce the overall size of the construction machine, and the cooling machine and the air cleaner 32 can be disposed so as not to overlap as much as possible. The cooling performance of the machine can be improved.

The element 3 of the air cleaner 32
8 can be easily attached and detached, and the above-described effects such as maintainability can be obtained. Further, in the above-described embodiment, the case where the engine is disposed horizontally in front of the counter weight 14 of the construction machine has been described. An effect can be achieved.

In the embodiment shown in FIG. 1, the radiator 18 and the oil cooler 22 are arranged between the operator room 10 and the engine 8 on the one side 1a. A fuel tank 31 and a hydraulic oil tank 3 are arranged on the other side 1b on the opposite side in the front-rear direction of the excavator.
0 is disposed, but the present invention is not limited to this. The radiator 18 and the oil cooler 22 are disposed on the other side 1b of the construction machine, and the operator room 1 shown in FIG.
0, a radiator 18 and an oil cooler 22
Even when the hydraulic oil tank 30 or the fuel tank 31 is disposed instead of the above, or when the engine 8 is disposed in the left and right opposite directions, substantially the same operation and effect as the above embodiment can be obtained.

Further, as shown in FIGS. 3 and 5, in the above embodiment, the case where the divided air cleaner 32 is disposed in front of the radiator 18 and the oil cooler 22 is shown.
Even if the undivided air cleaner 32 is disposed on the front side of the radiator 18 or the oil cooler 22 as shown in FIGS.

[0068]

As described above in detail, according to the construction machine cooling structure of the first aspect of the present invention, the operator room disposed on one side of the front end in the front-rear direction of the construction machine, An engine to which a hydraulic pump disposed between the counterweight provided at the rear of the construction machine and the operator room is connected, an engine room for accommodating the engine so as to be surrounded, and an engine room connected to the engine. A first pump of at least one of a hydraulic pump chamber of the hydraulic pump, a radiator for cooling water of the engine, and a cooler of an oil cooler for hydraulic oil of the construction machine; A first cooling fan for cooling the cooling machine, first driving means for driving the first cooling fan, and cooling of the radiator and the oil cooler arranged in parallel with the first cooling machine. A second cooling device for cooling at least one of the second cooling device, a second cooling fan for cooling the second cooling device, a second driving unit for driving the second cooling fan, the first cooling device, A partition wall provided between the first cooler and the second cooler provided on a cooling air intake side in front of the second cooler, and at least one of the first and second coolers; An air cleaner for intake of the engine, which is provided on the front side of one of the coolers and is provided so that an element of the air cleaner can be inserted thereinto and removed therefrom, so that the cooling air intake side partitioned by the partition wall has a first position. The cooling fan and the second cooling fan can efficiently enter the cooling air without being influenced by the suction force of the other cooling fan, and can cool the first and second cooling machines.

Further, the cooling air can enter from the cooling air intake side of the independent second cooling machine divided by the partition wall from the upper side to the lower side to cool the second cooling machine. In addition, the cooling performance can be improved by increasing the surface area of at least one of the first and second coolers, and the element of the air cleaner can be easily replaced, and maintenance and inspection can be easily performed. Can do it.

According to the construction machine cooling structure of the present invention, the operator room is provided on one side of the front end of the construction machine in the front-rear direction, and is provided at the rear of the construction machine. An engine to which a hydraulic pump disposed horizontally between the counterweight and the operator room is connected, an engine room for accommodating the engine so as to be surrounded, and a hydraulic pump connected to the engine. A hydraulic pump chamber; a first chiller of at least one of a radiator for cooling water of the engine and a cooler of an oil cooler for hydraulic oil of the construction machine;
A first cooling fan that cools a cooler, a first driving unit that drives the first cooling fan, and a radiator and an oil cooler that are arranged in parallel with the first cooler. A second cooling device for cooling the second cooling device, a second driving device for driving the second cooling fan, and a second driving device for driving the second cooling fan.
A partition wall provided between the first cooler and the second cooler, which is provided on a cooling air intake side in front of the cooler and the second cooler; and a partition wall of the first and second coolers. An air cleaner for air intake of the engine, which is provided on the front side of at least one of the coolers and is provided so that an element of the air cleaner can be inserted and removed, and the second cooler taken in by the second cooling fan. Since the heated air in the hydraulic pump chamber is ventilated to the air outside the hydraulic pump chamber by the fluid flow of the cooled cooling air, the second cooling air intake side divided by the partition wall receives the second air from the cooling air intake side. The cooling air can efficiently enter without being influenced by the suction force of the cooling fan, and the first and second coolers can be cooled.

Further, cooling air can enter from the cooling air intake side of the independent second cooling machine partitioned by the partition wall from the upper side to the lower side to cool the second cooling machine. In addition, the cooling performance can be improved by increasing the surface area of at least one of the first and second coolers, and the element of the air cleaner can be easily replaced, and maintenance and inspection can be easily performed. Can do it.

Further, the heated air in the hydraulic pump chamber can be effectively ventilated by the fluid flow of the cooling air that has cooled the second cooler. According to the cooling structure for a construction machine according to the third aspect of the present invention, an operator room disposed on one side of the front end in the front-rear direction of the construction machine, and a counter weight provided at a rear portion of the construction machine. An engine to which a hydraulic pump disposed horizontally between the operator room is connected, an engine room for accommodating the engine so as to be surrounded, and a hydraulic pump room for the hydraulic pump connected to the engine And at least one of a fuel tank and a hydraulic oil tank arranged on the other side opposite to the one side and arranged at intervals on the opening side of the hydraulic pump chamber. A first cooling unit disposed on the front side of the engine, at least one of a tank and a radiator for cooling water of the engine and a cooler for an oil cooler for hydraulic oil of the construction machine; When a first cooling fan for cooling the first cooling device, a first driving means for driving said first cooling fan, the first
A second cooling fan for cooling at least one of the radiator and the oil cooler disposed between the cooling device and the operator room; and a second cooling fan for cooling the second cooling device. A second driving means for driving the second cooling fan, and a first cooling device and a second cooling device provided on the cooling air intake side in front of the first cooling device and the second cooling device. A partition wall for partitioning the air cleaner, and an air cleaner for intake of the engine provided in front of at least one of the first and second coolers so that an element of the air cleaner can be inserted and removed. And the second cooling fan
Since the configuration is such that the heated air in the hydraulic pump chamber is ventilated to the air outside the hydraulic pump chamber by the fluid flow of the cooling air that has cooled the cooler, from the cooling air intake side partitioned by the partition wall. In addition, the cooling air can efficiently enter without being affected by the suction force of the second cooling fan, and the first and second coolers can be cooled.

Further, the cooling air can enter from the cooling air intake side of the independent second cooling machine divided by the partition wall from the upper side to the lower side to cool the second cooling machine. In addition, the cooling performance can be improved by increasing the surface area of at least one of the first and second coolers, and the element of the air cleaner can be easily replaced, and maintenance and inspection can be easily performed. Can do it.

Further, the heated air in the hydraulic pump chamber can be effectively ventilated by the fluid flow of the cooling air that has cooled the second cooler. According to the cooling structure for a construction machine of the present invention described in claim 4, in the configuration according to any one of claims 1 to 3, the concave portion provided on a load mounted on the construction machine, and the concave portion An air cleaner for intake of the engine, which is arranged so that at least a part of the air cleaner enters, and wherein the element of the air cleaner is configured to be able to be inserted and removed from the concave portion. In addition to the effects of the above, by disposing the air cleaner in the recess, the length in the width direction of at least one of the first and second coolers is increased to increase the surface area. In addition to improving the cooling performance, the elements of the air cleaner can be easily replaced, and maintenance and inspection can be easily performed.

For example, by effectively utilizing the dead space of the counterweight, it is possible to replace the radiator with an increased surface area, thereby improving the cooling performance of the radiator. According to the cooling structure for a construction machine according to the present invention, at least a part of the air cleaner is disposed in the recess during normal use, and the element of the air cleaner is disposed during maintenance. A movable means is provided so that the insertion opening can be moved at least to a position where it can be inserted and removed, so that the insertion and removal of the element is facilitated. The air cleaner is housed outside the flow passage, and the air cleaner can be moved to a site where maintenance is easy at the time of maintenance, so that the man-hour and labor for replacement and inspection can be reduced.

According to a sixth aspect of the present invention, in the construction of the fourth or fifth aspect, the air cleaner is divided into a plurality of air cleaners and at least one of the plurality of divided air cleaners. Since one of the air cleaners is disposed in the concave portion of the load, in addition to the effect of claim 4 or 5, each of the divided air cleaners has a smaller outer shape,
At the time of normal use, it can be easily stored by utilizing the dead space outside the cooling air flow path, and even if the divided air cleaners stored at the time of the maintenance are drawn out to the cooling air flow path, The shape of the air cleaner is small, so that the air cleaner can be easily replaced.

Even if the divided air cleaner enters the cooling air flow passage, its shape is small. Therefore, even if the divided air cleaner is disposed in the cooling air flow passage, the fluid resistance can be reduced to increase the cooling effect. it can. According to the construction machine cooling structure of the present invention described in claim 7, in the configuration according to any one of claims 1 to 3, at least a portion of the air cleaner includes the first cooling device and the first cooling device during normal use. The first cooler and the second cooler are disposed at a position below a lower portion of at least one of the coolers or at a position adjacent to the first cooler and the second cooler. The air cleaner according to any one of claims 1 to 3, further comprising movable means provided so that an insertion opening of an element of the air cleaner can be moved at least into the cooling air passage so as to easily insert and remove the element. In addition to any of the effects, at least one of the first and second coolers has a large surface area to improve the cooling performance, and the air can be improved. You can easily replace the Lena element of, maintenance, it is possible to easily perform the inspection.

According to an eighth aspect of the present invention, in the engine intake structure according to any one of the first to third aspects, the intake hose on the engine side from the air cleaner is connected to the intake hose. Since it is provided so as to pass between the first cooler and the second cooler, claims 1 to 3 and 7 are provided.
In addition to the effect of any one of the above, it is possible to replace the first or second cooling unit with an increased surface area of at least one of the cooling units, thereby improving the cooling performance of the cooling unit. it can.

According to the ninth aspect of the present invention, in the engine intake structure according to any one of the first to third and eighth aspects, at least one of the first cooler and the second cooler is provided. An air cleaner for intake of the engine provided on the front side of one of the coolers along the front-rear direction; and a lower side of at least one of the first and second coolers. An intake hose connected to the intake side of the engine from the air cleaner so as to pass therethrough, so that the element of the air cleaner can be inserted and removed.
In addition to the effect of any one of the items 3 and 8, the surface area of at least one of the first and second cooling units can be replaced with an increased surface area to improve the cooling performance of the cooling unit. I can do it.

According to the structure for cooling a construction machine according to the present invention, the first cooler is cooled in the structure according to any one of the second, third, fourth, sixth, seventh and ninth aspects. The cooling air is discharged from a cooling air outlet provided above the engine room after cooling the engine, and
The cooling air that has cooled the cooler is configured to be discharged to at least one of the front side and the side upper side of the construction machine.
In addition to the effects of any one of 6, 7, and 9, the engine and the engine room are efficiently cooled, and the cooling air that has cooled the second cooler is provided on the front or side of the construction machine. It is discharged to the upper side, and the heated air in the hydraulic pump chamber can be smoothly ventilated.

According to the construction machine cooling structure of the present invention, the intercooler for a supercharger provided in the engine is provided in the structure of any one of the first to fourth and tenth aspects. Since it is arranged together with either one of the first cooler and the second cooler,
In addition to the effects of any of the fourth and tenth aspects, the intercooler can be arranged compactly and inexpensively, and the intercooler can be efficiently cooled together with the first and second coolers.

According to the cooling structure for a construction machine according to the present invention, in the structure according to any one of the third, fourth, fifth, and eleventh aspects, the rear side of the operator room on one side is provided. At least one of the fuel tank and the hydraulic oil tank disposed on the side or on the other side opposite to the one side, and the cooling air that has cooled the second cooler. A guiding means for guiding the cooling air to at least one of the upper side and the front side of the construction machine at least on the surface side of the one tank facing the flow; , Claim 3,
In addition to the effects of any one of 4, 5, 10, and 11, the cooling air of the second cooler cooled by the guiding means is more smoothly and promptly discharged, thereby improving the cooling of the related parts of the construction machine. Can be done.

Further, the heated air in the hydraulic pump chamber can be effectively ventilated by the fluid flow of the cooling air that has cooled the second cooler. Further, the cooling air can enter from the cooling air intake side of the independent second cooling machine divided by the partition wall from the upper side downward to cool the second cooling machine. In addition, the cooling performance can be improved by increasing the surface area of at least one of the first and second coolers, and the element of the air cleaner can be easily replaced, and maintenance and inspection can be easily performed. Can do it.

[Brief description of the drawings]

FIG. 1 is a schematic plan view showing one embodiment of the present invention and showing a case where a cooling structure of a construction machine of the present invention is applied to a hydraulic shovel.

FIG. 2 is a schematic explanatory view showing a main part of FIG. 1 as viewed in the direction of arrow 2Y.

FIG. 3 is a schematic explanatory view showing an application example of FIG. 1;

4A and 4B show side views of FIG. 3, wherein FIG. 4A is a schematic explanatory view showing a main part taken along arrow 4Y in FIG. 3, and FIG. 4B is a schematic explanatory view showing a modification of FIG. It is.

FIG. 5 is a schematic explanatory view showing another application example of FIG. 1;

6A and 6B are side views of FIG. 5, wherein FIG. 6A is a schematic explanatory view showing a main part taken along arrow 6Y of FIG. 5, and FIG. 6B is a schematic explanatory view showing a modification of FIG. 6A. It is.

FIG. 7 is a schematic explanatory view showing a cross section along the line 7A-7A in FIG. 5;

FIG. 8 is a schematic perspective view of a hydraulic excavator showing a flow of cooling air of a radiator and an oil cooler of FIG. 1;

FIG. 9 is a schematic explanatory view showing a modification of FIG. 8;

FIG. 10 is a schematic explanatory view showing a plane of a conventional hydraulic excavator.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Lower traveling body 2 Upper revolving superstructure 2sc Side cover 2uc Upper cover 6 Working device 8 Engine 10 Operator room 14 Counter weight 16 Hydraulic pump 17 Engine hood 18 Radiator 20 First cooling fan 21, 26 Driving means 22 Oil cooler 24 Second Cooling fan 28 Control valve 30 Hydraulic oil tank 31 Fuel tank 32 Air cleaner 34 Casing 36 Outside air layer 35 Opening / closing means 38 Element 40 Intake layer 46,48 Hinge 60,60a Cooling air outlet 64a-64c Cooling air inlet 64d, 64e Cooling air intake Inlet 76 Movable plate D1, D2 Door K1 to K5 Seal cover H Movable means M Muffler R Guiding means PS Gap W Partition wall W1 to W5 Partition plate W4a Partition wall Wa Front partition Wfb Front side partition Wrb Rear side partition Wc rear partition walls IC intercooler

Claims (12)

[Claims] 1. An operator room disposed on one side of a front end of a construction machine in a front-rear direction, a hydraulic pressure disposed between a counter weight provided on a rear portion of the construction machine and the operator room. An engine to which a pump is connected, an engine room for accommodating the engine so as to be surrounded, a hydraulic pump chamber for the hydraulic pump connected to the engine, a radiator for cooling water of the engine, and A first cooler of at least one of a cooler of an oil cooler for hydraulic oil, a first cooling fan for cooling the first cooler, and a first drive unit for driving the first cooler fan; A second cooler of at least one of the radiator and the cooler of the oil cooler arranged in parallel with the first cooler;
A second cooling fan for cooling the second cooler;
A second drive unit for driving a cooling fan; and a partition for separating between the first and second coolers provided on a cooling air intake side in front of the first and second coolers. A wall, and an air cleaner for intake of the engine provided on a front side of at least one of the first and second coolers so that an element of the air cleaner can be inserted and removed. A cooling structure for construction machinery. 2. An operator room disposed at one side of a front end of the construction machine in the front-rear direction, and horizontally disposed between a counter weight provided at a rear portion of the construction machine and the operator room. Engine with the connected hydraulic pump,
An engine room for accommodating the engine so as to be enclosed, a hydraulic pump room of the hydraulic pump connected to the engine, a radiator for cooling water of the engine, and cooling of an oil cooler for hydraulic oil of the construction machine; A first cooling device for cooling at least one of the first cooling device, a first cooling fan for cooling the first cooling device, a first driving unit for driving the first cooling fan, and a parallel connection with the first cooling device. And a second cooling fan of at least one of the radiator and the oil cooler arranged to perform cooling, a second cooling fan that cools the second cooler, and the second cooling fan. A second driving means for driving; a partition wall provided between the first and second coolers and provided on a cooling air intake side in front of the first and second coolers; the above An air cleaner for intake of the engine, which is provided in front of at least one of the first and second coolers so that an element of the air cleaner can be inserted and removed, and the second cooling fan Construction machine, wherein the heated air in the hydraulic pump chamber is ventilated to the air outside the hydraulic pump chamber with a fluid flow of cooling air taken in by the cooling device and cooling the second cooler. Cooling structure. 3. An operator room disposed on one side of a front end in the front-rear direction of the construction machine, and horizontally disposed between a counter weight provided on a rear portion of the construction machine and the operator room. Engine with the connected hydraulic pump,
An engine room for accommodating the engine so as to be surrounded, a hydraulic pump room for the hydraulic pump connected to the engine, and a hydraulic pump room disposed on the other side opposite to the one side. At least one of a fuel tank and a hydraulic oil tank arranged at intervals on the opening side of the engine, a radiator for cooling water of the engine, and an oil cooler for hydraulic oil of the construction machine. A first cooler disposed in front of the engine of at least one of the coolers, a first cooling fan for cooling the first cooler, and a first drive for driving the first cooling fan Means, a second chiller of at least one of the radiator and the oil cooler disposed between the first chiller and the operator room, and the second chiller; A second cooling fan for cooling the 却機,
A second driving unit for driving the second cooling fan, and a first cooling unit and a second cooling unit, which are provided on a cooling air intake side in front of the first cooling unit and the second cooling unit. A partition wall for partitioning the air cleaner, and an air cleaner for intake of the engine provided on a front side of at least one of the first and second coolers so that an element of the air cleaner can be inserted and removed. And configured to ventilate heated air in the hydraulic pump chamber to air outside the hydraulic pump chamber with a fluid flow of cooling air taken in by the second cooling fan and cooling the second cooler. A cooling structure for construction machinery, characterized in that: 4. The air cleaner according to claim 1, further comprising a concave portion provided on a load provided on the construction machine, and an air cleaner for intake of the engine disposed so as to at least partially enter the concave portion. The cooling structure for a construction machine according to any one of claims 1 to 3, wherein the element is configured to be inserted and removed from the recess. 5. A movable means provided at least a part of the air cleaner in the concave portion during normal use, and provided so that an insertion / removal opening of an element of the air cleaner can be moved to at least a position where it can be inserted / removed during maintenance. The cooling structure for a construction machine according to claim 4, wherein the cooling structure is configured to facilitate insertion and removal of the element. 6. The air cleaner according to claim 4, wherein said air cleaner is divided into a plurality of parts, and at least one of said plurality of divided air cleaners is disposed in a concave portion of said mount. Or a cooling structure for a construction machine according to 5. 7. In normal use, at least a portion of the air cleaner is located below a lower portion of at least one of the first and second coolers or the first and second coolers. Movable means provided so as to be located at a position adjacent to the second cooler, and provided so that an insertion / removal opening of the element of the air cleaner can be moved at least into the cooling air passage during maintenance,
The cooling structure for a construction machine according to any one of claims 1 to 3, wherein the element is configured to be easily inserted and removed. 8. An intake hose from an air cleaner to an intake side on an engine side is provided so as to pass between the first cooler and the second cooler.
The cooling structure for a construction machine according to claim 1. 9. An air cleaner for intake of the engine, which is provided along the front-rear direction on a front side of at least one of the first and second coolers, and the first cooling device. An intake hose connected to a lower side of at least one of the cooling unit and the second cooling unit and connected to the intake side on the engine side from the air cleaner, wherein an element of the air cleaner is provided. The cooling structure for a construction machine according to any one of claims 1 to 3, wherein the cooling structure is configured to be able to be inserted and removed. 10. The cooling air that has cooled the first cooler is discharged from a cooling air outlet provided above the engine room after cooling the engine, and the cooling air that has cooled the second cooler is used for the construction. 4. The machine according to claim 2, wherein the machine is configured to be discharged to at least one of a front side and a side upper side of the machine.
10. The cooling structure for a construction machine according to any one of 4, 6, 7, and 9. 11. An intercooler for a supercharger provided in the engine is provided together with one of the first cooler and the second cooler. 11. The cooling structure for a construction machine according to any one of items 4 to 10. 12. The fuel tank and / or the hydraulic oil tank disposed on the rear side of the operator room on one side or on the other side opposite to the one side. Tank, and the surface of at least one of the tanks on the side facing the flow of the cooling air that has cooled the second cooler, and The cooling structure for a construction machine according to any one of claims 3, 4, 5, 10, and 11, further comprising a guiding unit for guiding cooling air.