JP2003011679A - Cooling device for construction machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve cooling efficiency in a cooling device for a construction machine such as a hydraulic shovel, a self loader, a bulldozer, a wheel loader and a crawler loader. SOLUTION: An air cleaner 32 for combustion air for an engine 8 is provided to be inclined in a direction away from a front surface of a cooling core of the cooling device R such as a radiator 18, an oil cool 22 for hydraulic fluid and an intercooler IC mounted on the construction machine.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooling device for construction machines such as hydraulic excavators, self-loaders, bulldozers, wheel loaders, crawler loaders and the like, agricultural machines and the like (hereinafter simply referred to as construction machines). .

[0002]

2. Description of the Related Art Construction machines such as hydraulic excavators, self-loaders, bulldozers, wheel loaders, crawler loaders, etc.
As is well known, it is used for excavating rocks such as dams, tunnels, rivers and roads in mountainous areas, and for demolition of buildings and buildings. In the construction of the construction machine, for example, in a hydraulic excavator, as shown in FIG. 12, a lower traveling body 1, an upper revolving body 2 rotatably arranged above the lower traveling body 1, and an upper revolving body are provided. And a working device 6 for performing various works.

The upper revolving structure 2 is composed of 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 described above, and covers the outer peripheral side portion of the upper revolving structure 2. It is composed of a side cover 2sc, an upper cover 2uc that covers the upper outer periphery of the upper revolving structure 2, an engine hood 17, and the like. Further, the lower traveling body 1 is composed of a car body, a track roller frame, a traveling device and a foot suspension device (not shown), and the working device 6 further operates a boom and an arm for supporting a bucket (not shown) and the boom and arm. Composed of various hydraulic cylinders and link rods,
Further, it is composed of the above-described turning device, traveling device, and the like.
On the other hand, the air cleaner 32 for intake to the engine 8 is used.
Is determined by the size of the engine 8 and the design specifications of the construction machine, but its shape is considerably large.

For example, the above-mentioned air cleaner 32 is inserted substantially coaxially with a cylindrical casing 34 and a casing 34 forming an outside air layer 36 for taking in outside air at a distance from the inner peripheral surface of the casing 34. One end is connected to the element 38 of the cylindrical air cleaner 32 arranged so as to be detachable, and the intake layer 40 of the cooling air obtained by filtering the outside air by the element 38, and the other end is connected to the intake pipe of the engine 8. It is composed of an intake hose 42.

The casing 34, which is 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 thereof is about 350 mm, for example. Such an air cleaner 32 is used in the engine 8
If it is provided at the upper part of the hydraulic excavator, it is necessary to climb up to the upper cover 2uc of the hydraulic excavator at the time of maintenance such as replacement of the element 38, and it is not easy to work at a high place with poor footing.

Therefore, the arrangement position of the air cleaner 32 of the conventional apparatus is, for example, as shown in FIG. 12, a diameter of about 350 mm between the radiator 18 and the oil cooler 22.
The casing 34 is provided with a space V1 in which the casing 34 can be attached and detached, and is provided at a position of the eye level assuming a mechanic of average height. Further, as shown in FIG. 12, the hinge 4 is provided on the operator room 10 side and the counter weight 14 side.
The side cover 2s on the left side of the hydraulic excavator is pivotally supported via 6 and 48 so as to be opened and closed in a double-door manner.
c is composed of doors D1 and D2.

At the time of the above-mentioned maintenance and inspection, the mechanic makes a door D
1, D2 are opened and the ground is provided between the side lid 50 of the air cleaner 32 and the casing 34. Although not shown in detail in the drawings, the clip 35 is configured to be engageable and disengageable. The side lid 50 is removed from 34, and the element 40 can be easily replaced in the direction of arrow P shown in FIG.

[0008]

However, in order to reduce the emission of nitrogen oxides and the like because the noise of the construction machine and the exhaust gas regulation of the engine 8 become stricter, for example, if the combustion temperature of the engine 8 is lowered, the combustion process Since the exhaust temperature rises to the latter half, the cooling loss of the engine increases and the temperature of the cooling water of the engine 8 rises as compared with the conventional case. Therefore, in order to lower the temperature of this cooling water, the radiator 1
It is necessary to improve the cooling performance of No. 8.

Therefore, in order to make the radiator 18 large, the air cleaner 32 becomes an obstacle, so that a large radiator 18 cannot be arranged. That is, when the large radiator 18 and the air cleaner 32 and the oil cooler 22 are arranged as described above, the length of the upper revolving structure 2 in the front-rear direction becomes long, so that the turning radius becomes long and the work at a narrow construction site can be performed. It becomes impossible and the work area is restricted.

Further, when the radiator 18 is extended downward, the ground height of the hydraulic excavator becomes too low, and when the building dismantling site is approached, the remains of steel frames of reinforced concrete and the remains of rocks and large trees at construction sites such as tunnels and dams are above the hydraulic pressure. It cannot be extended downwards as it may push the shovel floor up. Further, if the radiator 18 is extended upward, the visibility of the rear side is deteriorated and the center of gravity of the hydraulic excavator may become high, which may cause instability.

On the other hand, if the core layer of the radiator 18 is made thicker to increase the amount of cooling water, not only the circulation resistance of the cooling air increases but also the length in the vehicle width direction increases, which violates the regulations of the Road Traffic Law. As a result, it becomes impossible to mount the hydraulic excavator on a truck and drive it on a general road for transportation. The present invention was made in view of these problems, and is arranged so as to be inclined in a direction away from the front surface of a cooling core of a cooling device such as a radiator mounted on a construction machine, an oil cool for hydraulic oil, and an intercooler. An object of the present invention is to provide a cooling device for a construction machine having an air cleaner for installed combustion air of an engine.

[0012]

Therefore, a cooling device for a construction machine according to the present invention according to claim 1 cools the cooling device comprising a plurality of heat exchangers mounted on the construction machine, and the cooling device. A cooling device for a construction machine, comprising: a cooling fan; a driving means for operating the cooling fan; and an engine housed in an engine room for operating the construction machine, wherein the cooling device is inclined in a direction away from a front surface of a cooling core of the cooling device. As described above, the air cleaner disposed on the upper revolving structure side of the construction machine on the front side of the cooling core, and the air cleaner.
And an intake pipe connecting the engine and the air cleaner for supplying the cooling air cleaned by the engine to the engine, and a cooling air intake for introducing the cooling air provided in the cover of the construction machine. It is characterized by having and.

According to a second aspect of the present invention, there is provided a cooling device for a construction machine according to the first aspect, wherein the engine ruler
Is a rear partition wall provided between the engine and a hydraulic pump connected to the engine, and one first side connecting one side portion of the cooling device and one side portion of the rear partition wall. It is characterized by being configured by a partial partition wall and the other side partition wall that connects the other side portion of the cooling device and the other side portion of the rear partition wall.

A cooling device for a construction machine according to a third aspect of the present invention is the cooling device for a construction machine according to the first or second aspect, wherein the first cooling device comprises at least one of the plurality of heat exchangers. And a second cooling device composed of the rest of the plurality of heat exchangers are arranged in parallel. According to a fourth aspect of the present invention, there is provided a cooling device for a construction machine according to the third aspect, wherein the cooling device includes a first cooling device and a second cooling device, and the first cooling device and the first cooling device. A cooling fan for cooling the device, a driving means for driving the first cooling fan, a first space portion in which the engine is arranged, the second cooling device, a second cooling fan for cooling the second cooling device, It is characterized in that the first side partition wall that restricts the flow of the cooling air that partitions the second space portion in which the drive means for driving the second cooling fan is arranged is provided.

According to a fifth aspect of the present invention, there is provided a cooling device for a construction machine according to the second or fourth aspect, wherein the first side partition wall is at least one of both sides of an axis of a crankshaft of the engine. An expansion side portion which is provided on one side and is inclined in a direction away from the axis line in a direction intersecting with the axis line so as to increase a space between the one side of the engine and the first side partition wall. It is characterized by having a partition wall.

According to a sixth aspect of the present invention, there is provided a cooling device for a construction machine according to any one of the first to fifth aspects, wherein the intake pipe is provided on the outer periphery of the cooling device.
The first side partition wall and the other side partition wall, and is supported by a mounting member on at least one of the first side partition wall and the other side partition wall. It is characterized by being.

According to a seventh aspect of the present invention, there is provided a cooling device for a construction machine according to the fourth aspect, wherein the first side partition wall and the other side are disposed on both left and right sides of an axis of a crank shaft of the engine. The first space portion is configured by the side partition wall and the rear partition wall that separates the hydraulic pump connected to the engine from the engine.

According to an eighth aspect of the present invention, there is provided a cooling device for a construction machine according to any one of the first to seventh aspects, wherein the cooling device is directed between a cooling core of the cooling device and the air cleaner. The cooling air intake is provided in the upper cover or the side cover of the upper swing body of the construction machine so that the cooling air is supplied.

A cooling device for a construction machine according to a ninth aspect of the present invention is the cooling device for a construction machine according to any one of the first, fourth and seventh aspects, wherein cooling air is provided at a distance from the first side partition wall. And a second side partition wall which is arranged so as to form the flow port and which surrounds the rear partition wall and constitutes the hydraulic pump chamber. A cooling device for a construction machine according to a tenth aspect of the present invention is the cooling device for a construction machine according to the ninth aspect, wherein a cooling air from the second cooling fan is introduced through the flow port to a partition wall surrounding the hydraulic pump chamber. It is characterized in that it is configured to be discharged from a discharge port provided.

The cooling device for a construction machine according to an eleventh aspect of the present invention is the cooling device for a construction machine according to any one of the fourth to tenth aspects, wherein the cooling device is provided on the front side of the cooling core and has one space. And an intake duct that guides the flow of the cooling air to the second space portion. A cooling device for a construction machine according to claim 12 of the present invention is
The structure according to any one of claims 4 to 11,
It is characterized in that the third side partition wall at the front portion that partitions the first space portion and the second space portion of the suction duct is configured integrally with or separately from the first side partition wall.

According to a thirteenth aspect of the present invention, there is provided the cooling device for a construction machine according to the twelfth aspect, in which the third side partition wall of the front portion is spaced from the first side partition wall which is set according to design specifications. It is characterized by being installed. A cooling device for a construction machine according to claim 14 of the present invention is
The structure according to claim 12 or 13 is characterized in that the third side partition wall of the front portion is provided with an auxiliary side partition wall whose length is adjustable.

A cooling device for a construction machine according to a fifteenth aspect of the present invention is the cooling device for a construction machine according to any one of the fourth, eleventh, twelve, thirteenth and fourteenth aspects, wherein at least the intake duct of the second space portion is A guide member for guiding the cooling air is provided downstream of the second cooling device of the construction machine. A cooling device for a construction machine according to a sixteenth aspect of the present invention is an operator room arranged at one side of a front end portion of the construction machine in the front-rear direction, a counterweight provided at a rear part of the construction machine, and the operator. Of the engine horizontally disposed between the chamber and the hydraulic pump connected thereto, and the radiator for cooling water of the engine disposed in front of the engine and the oil cooler for hydraulic oil of the construction machine One of the first cooling devices, a first cooling fan that cools the one first cooling device, a driving unit that drives the first cooling fan, and the first cooling device on the front side of the one cooling device. An air cleaner disposed on the side of the upper revolving structure of the construction machine on the front side of the cooling core so as to be inclined in a direction away from the front of the cooling core of the cooling device, and cleaned by the air cleaner. Was done An intake pipe connecting the engine and the air cleaner for supplying the rejected air to the engine; and a cooling air inlet for introducing cooling air provided in the cover of the construction machine. It has a feature.

A cooling device for a construction machine according to a seventeenth aspect of the present invention is the cooling device for a construction machine according to the sixteenth aspect, wherein the cooling device is arranged at a rear portion of the operator room between the one first cooling device and the operator room. And a second cooling fan for cooling the other second cooling device of the radiator and the oil cooler, a second cooling fan for cooling the other second cooling device, and a drive means for driving the second cooling fan. Is characterized by.

According to an eighteenth aspect of the present invention, there is provided a cooling device for a construction machine according to the sixteenth or seventeenth aspect, wherein an intake hose connected from the air cleaner to the engine has the first cooling device and the second cooling device. It is characterized in that it is provided so as to pass between the device and the upper part of the cooling device. A cooling device for a construction machine according to a nineteenth aspect of the present invention is the cooling device for a construction machine according to any one of the first, eighth, sixteenth, and eighteenth aspects, wherein the cooling device is attached to an upper cover side of an upper swing body of the construction machine. The feature is that the air cleaner is attached through the bracket.

A cooling device for a construction machine according to a twentieth aspect of the present invention is the cooling device for a construction machine according to any one of the second to tenth aspects, wherein the cooling air for cooling the first example casing device is used for the engine. After cooling, the cooling air discharged from a cooling air outlet provided above the engine room and cooling the second cooling device is at least one of the front side and the upper side of the construction machine. It is characterized in that it is configured to be discharged to.

According to a twenty-first aspect of the present invention, there is provided a cooling device for a construction machine according to any one of the fourth to fifteenth and sixteenth aspects, wherein either the first space portion or the second space portion is formed. An intercooler provided independently of the plurality of other cooling devices is provided. A cooling device for a construction machine according to a twenty-second aspect of the present invention,
The construction described in any one of 4, 9, 10, 12, 13, 14, and 16 is characterized in that the intercooler is attached substantially horizontally to the upper swing body of the construction machine.

According to a twenty-third aspect of the present invention, there is provided a cooling device for a construction machine according to the sixteenth aspect, wherein the one side portion is behind the operator room or the other side portion is opposite to the one side portion. The surface shape of at least one of the fuel tank and the hydraulic oil tank disposed on the side of the tank and the side of the one tank facing the flow of the cooling air that has cooled the second cooling device. At least one of the upper side and the front side of the machine is provided with a guiding means for guiding the cooling air.

According to the cooling device for a construction machine of the present invention as set forth in claim 24, in the constitution of any one of claims 1, 4, 6, 16, 22, 24, the front surface of the cooling core of the cooling device. An air cleaner for air for combustion of the engine disposed on the side, an intake pipe connecting the air cleaner and the engine, and an intake device in which the intake pipe is supported by a side partition wall of the engine room. It is characterized by

[0029]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to the drawings, in which parts that are substantially the same as those in the conventional example are designated by the same reference numerals. FIG. 1 shows an embodiment of the present invention in which a cooling device for a construction machine according to the present invention is applied to a hydraulic excavator, and a plurality of cooling devices mounted on the hydraulic excavator are arranged in parallel. 2 is a schematic explanatory view showing a main part of FIG. 1 viewed from the arrow 2Y, FIG. 3 is a schematic detailed explanatory view showing the same state as FIG. 2, and FIG. 4 is a radiator of FIG. 1 with an intercooler. 6 is a schematic explanatory view showing a state similar to that of FIG. 1 in the case where they are arranged so as to be superposed in series, FIG. 5 is a schematic explanatory view seen from diagonally above with the first side partition wall of FIG. 4 removed, and FIG. 4 is a schematic explanatory view showing a cross section taken along line 6a-6A in FIG. 4, FIG. 7 is a schematic explanatory view showing a cross section taken along line 7A-7A in FIG. 4, and FIG. 8 is a diagram showing cooling air for the radiator and the oil cooler shown in FIG. 1 is a schematic perspective view of a hydraulic excavator showing a flow, FIG. 9 is a schematic explanatory view showing a modification of FIG. 8, and FIG.
11 is a schematic perspective view showing a state in which the intercooler is horizontally arranged on the upper revolving structure, and FIG. 11 is a relationship between the first side partition wall shown in FIG. 1 and an auxiliary third side partition wall provided in the intake duct. It is the schematic diagram which showed.

The cooling device for a construction machine according to the present invention may be equipped with a cooling device R in which a plurality of heat exchangers are arranged in series or the plurality of heat exchangers are arranged in parallel. In the case of the embodiment, a case where the plurality of heat exchangers are arranged in parallel will be described. As shown in FIG. 1, the hydraulic excavator described above has a lower traveling body 1 and an upper traveling body 2
Is rotatably mounted, and high-pressure hydraulic oil from a hydraulic pump 16 driven by an engine 8 equipped with the hydraulic excavator is supplied to a lower traveling body 1 of the hydraulic excavator 1.
An oil cooler 22 that cools the high-temperature working oil that has returned to the upper revolving structure 2, the working device 6 and the like and is returned.
A cooling device for the hydraulic excavator, which includes a radiator 18 for cooling the cooling water of the engine 8, is provided.

A first cooling device (radiator) 18 comprising at least one of the plurality of heat exchangers described above.
And a second cooling device (oil cooler) 22 composed of the rest of the plurality of heat exchangers are arranged in parallel. The first cooling fan 20 for cooling the first cooling device, the driving means 21 for operating the first cooling fan 20, and the engine 8 housed in the engine room ER for operating the construction machine are provided. First cooling device 18
Of the cooling core 18K, the air cleaner 32 is provided on the front side of the cooling core 18K so as to be inclined in a direction away from the front surface of the cooling core 18K, and the cooling cleaned by the air cleaner 32. An intake pipe 42 connecting the engine 8 and the engine cleaner 32 to supply air to the engine 8.
And as shown in FIGS. 1 and 8, the cover-2 of the construction machine described above.
Cooling air inlet 64 for introducing cooling air provided in C
a to 64e.

The cover 2C is an upper cover 2uc for covering the upper part of the engine room ER, the control valve 28, etc., excluding the operator room 10, the fuel tank 31, and the hydraulic oil tank 30, and a side cover 2 for covering the outer surface of the upper swing body 2.
It is composed of sc. And engine room ER
The engine hood 17 is provided in place of the upper cover 2uc in the upper opening portion of the engine hood 17 as necessary, but in the case of the present embodiment, the engine hood 17 is provided.

The engine room RM includes a rear partition wall Wc provided so as to isolate the engine 8 and the hydraulic pump 16 connected to the engine 8 from each other, and the first cooling device (radiator 18). One side partition wall connecting the partition plate W4 on one side and the rear partition Wc on one side
(Front first side partition wall) Wfb and the first cooling device 18
Of the rear partition wall Wc and the other side wall of the rear partition wall Wc (first rear side partition wall) Wrb.

The first cooling device (radiator) 18,
A first cooling fan 20 for cooling the first cooling device 18,
The driving means 21 for driving the first cooling fan 20, the first space 81 in which the engine 8 is arranged, the second cooling device 24 for cooling the second cooling device 22, and the second cooling device, the second cooling The front first side partition wall Wfb that restricts the flow of the cooling air that partitions the second space portion 82 in which the driving unit 26 that drives the fan 24 is disposed is provided.

The front first side partition wall Wfb is provided on at least one of the left and right sides of the axis of the crankshaft of the engine 8 and extends in a direction away from the axis in a direction intersecting the axis. An expanded first side partition wall Wfb2 is provided that is inclined and bent from the upper portion of the first side partition wall Wfb1 of the base so as to increase the space between one side of the engine 8 and the first partition wall Wfb. However, this may be configured such that the entire first side partition Wfb1 of the base is inclined as described above so that the space is increased.

The intake pipe 42 is a seal cover K provided on the outer periphery of the first cooling device (radiator) 18.
3 is disposed inside the expanded first side partition wall Wfb2 and is supported by the expanded first side partition wall Wfb2 by a bracket BK and a bolt BT. Further, as shown in FIG. 1, the front first side wall Wfb arranged on both left and right sides of the axis SC of the crankshaft of the engine 8 and the hydraulic pump 16 and the engine 8 connected to the engine 8 are isolated from each other. Rear partition W
The first space portion 81 is configured by c.

Further, the cooling core 18k of the first cooling device described above.
The upper cover 2uc, which is the cover 2C of the upper revolving unit 2 or the side cover 2sc, is provided so that the cooling air is supplied in the direction between the air cleaner 32 and the air cleaner 32, as shown in FIG. Cooling air intake 64a-64
It has c. Also, the above-mentioned front first side partition wall Wfb
And a rear second side partition wall Wfb3 that is disposed so as to form a cooling air circulation port PSM and is surrounded by the rear partition wall Wc to form the hydraulic pump chamber PR. Shows the case where it is also used as the side surface of the hydraulic oil tank 30, but it may be constructed separately from the independent hydraulic oil tack 30.

Further, the flow port PSM between the second side partition Wfb3 at the rear portion of the hydraulic pump 16 and the partition member Wc.
The cooling air from the second cooling fan 24 is introduced through the exhaust port 4 provided in the partition wall surrounding the hydraulic pump chamber PR.
It is configured to be discharged from at least one of 6a and 46b. Further, the first space 81 and the second space 82 are provided on the front side of the cooling core of the cooling device R.
Intake duct 1 for guiding the flow of the cooling air to and
00 is the rear surface 10a of the operator room 10, the front surface 14a of the counterweight 14, the upper cover 2uc, and the upper swing body 2.
And the floor.

Further, the third side partition wall Wf at the front part for partitioning the space between the first space 81 and the second space 82 of the suction duct 100.
When b4 is provided, the front third side partition wall Wfb is provided.
4 is a front third side partition Wfb4 as shown in FIG.
Is the front third side partition Wfb4 and the first side partition W
It may be configured integrally with or separately from fb, and in this case, the amount of intake air of the intake duct 100 is set to the first and second spaces 81 and 82, and air is supplied.

Also, as shown in FIG. 11, the third part of the front part is used.
The side partition wall Wfb4 may be disposed at a distance LS from the first side partition wall Wfb set according to the design specifications. In this case, as shown in FIG. 1, for example, the first cooling fan 20 is large. In that case, if the space LS is set according to the design specifications without changing the design to increase the volume of the flow rate of the cooling air, the fluid pressure difference between the first and second space portions 81 and 82 may be obtained. The desired cooling air can be supplied to each.

The front third side partition Wfb4 is an auxiliary third partition Wfbx whose length is adjustable.
11 is provided as shown in FIG. 11, the bolt BT is tightened by appropriately matching the bolt holes H provided in each of them, and the interval LS is adjusted. Cooling air can be supplied to each. Further, when the first side partition Wfb and the auxiliary third side partition Wfbx are separated from each other, the size is smaller and the assembling and disassembling are easier, and the cost is lower than the case of the integrally large size. The strength can be increased.

Further, since the intake duct of the second space portion 82 is provided with at least the guide member G for guiding the cooling air provided on the downstream side of the second cooling device 22 of the construction machine, the flow of the cooling air is smooth. Can be Then, as shown in FIG. 1, an operator room 10 disposed on one side of the front end portion 1a in the front-rear direction of the hydraulic excavator,
An engine 8 horizontally disposed between a counterweight 14 provided at a rear portion of the hydraulic excavator and an operator room 10 and connected to a hydraulic pump 16, and a front side of a crankshaft of the engine 8 in a direction of an axis SC. One of the cooling devices R of the radiator 18 for cooling water of the installed engine 8 and the cooling device R of the oil cooler 22 for the hydraulic oil of the hydraulic excavator is provided. In the present embodiment, the radiator 18, the oil A cooler 22 is provided.

In the above embodiment, the case where the engine 8 is placed horizontally is shown. However, the present invention is not limited to this. The engine 8 extends in the longitudinal direction of the hydraulic excavator along the axis SC of the crankshaft of the engine 8. The same effect can be obtained in the case of the vertical arrangement. A first cooling fan 20 that cools the radiator 18 and a driving unit 21 that includes any one of the hydraulic motor, the electric motor, and the engine 8 that drives the first cooling fan 20 are provided. In this embodiment, it is configured to be driven by the engine 8.

Further, between the rear portion of the operator room 10 and the radiator 18 or the first cooling fan 20, an oil cooler 22 which is the other cooling device of the above cooling device, and a second cooling fan 24 which cools the oil cooler 22 are provided. , And drive means 26 configured in the same manner as the drive means 21 for driving the second cooling fan 24. Further, the intercooler IC for the supercharger arranged in the engine 8 is installed in the radiator 1 described above.
8 and the oil cooler 22 may be provided together, but in the case of the present embodiment, as shown by the chain double-dashed line in FIG. 1, the intercooler I is provided in front of the oil cooler 50.
C is provided, and the intercooler I is provided with the oil cooler 22.
C can be efficiently cooled.

Further, as shown in FIG. 1, an air cleaner 32 for intake of the engine 8 is provided on the front side of the radiator 18, which is the one cooling device, along the longitudinal direction of the hydraulic excavator. Element 38
Is configured to be attachable / detachable in the Q direction substantially coaxially with the casing 34. Further, the air cleaner 32 may be provided so as to be separated from the front surface of the cooling core of at least one of the both cooling devices.

The intake hose 42 from the air cleaner 32 to the intake side of the engine 8 has a seal cover K3 provided in the gap between the oil cooler 22 and the front first side partition Wfb as shown in FIG. It is provided to penetrate. Further, seal covers K2 and K5 are provided in a gap between the radiator 18 and the front surface of the counterweight 14 and a gap between the rear portion of the operator chamber 10 and the oil cooler 22.

Further, the intake hose 42 of the air cleaner 32
Is a prior art, which penetrates the partition 22D of the oil cooler 22 as shown in FIG.
Although it is arranged so as to pass through the side partition wall Wfb and make a detour, in the present embodiment, the space between one side of the engine 8 and the first side partition wall Wfb is increased as described above. Since it is arranged directly on the expanded first side partition Wfb2,
The intake efficiency can be improved.

Further, seal covers K3 and K4 are provided between the front first side partition Wfb and the oil cooler 22 via partition plates W3 and W4. The seal covers K1 to K5 have a sealing effect for preventing hot air discharged to the downstream side of the radiator 18 and the oil cooler 22 through the gaps from rewinding to the upstream side of the cooling device. It is made of a heat-resistant and flexible elastic material having a high sealing effect, such as urethane foam, sponge, and rubber.

Further, since the air cleaner 32 is disposed on the front side of the radiator 18, the radiator 18 and the oil cooler 2 are provided.
The gap between the two is reduced from the length of the diameter of the air cleaner 32 to the length of the diameter of the air hose 42. For example, the width of the radiator 18 having a height of about 1000 mm is increased by the length reduced as described above for effective cooling. The surface area can be increased.

Although this increased effective cooling surface area is reduced by the area where the air cleaner 32 overlaps with the front surface of the radiator 18, the effect of improving maintenance such as replacement of the element 38 of the air cleaner 32 described later can be obtained. It is what is done. Moreover, not only is the effective cooling surface area increased to improve the cooling efficiency of the radiator 18, but the air cleaner 32 is also used to cool the radiator 18.
By arranging so as to incline in a direction away from K, the doors D1 and D2 on the side of the upper swing body 2 are appropriately opened,
For example, the side cover 50 is opened by the opening / closing means 35 of the clip 35, which is usually used in this type of device using a clip 35, a thumbscrew (not shown), etc. When the element 38 is housed, the element 38 can be easily mounted in the casing 34 of the air cooler 32 by reversing the above procedure when the element 38 is stored.

Further, as shown in FIG. 3, the air cleaner 32
The bracket BK is attached to the reinforcing member ST of the upper cover 2uc above the radiator 18 by a bolt BT or the like, and the attachment flange 32F of the casing 34 of the air cleaner 32 is attached to the attachment surface BTF facing downward by the bolt BT. If a plurality of bolt holes are provided on the mounting surface STF as shown in FIG. 3 and a bellows-shaped movable hose UJ is provided between the air cleaner 32 and the intake hose 42 as shown in FIG. By changing the mounting position of the air cleaner 32, the performance can be improved and the efficiency of maintenance can be improved.

Further, as shown in FIG. 3, in the space on the front side of the cooling core 18K of the radiator 18, the air cleaner 32, the relay box ERK, the battery BTT, etc. are centrally arranged, and the oil is In the space on the front side of the cooling core of the cooler 22, an air conditioner ARD,
The wash tank WT, the fuel filter FF, the reservoir tank RRT for storing the water separated by the fuel / water separator, etc. are centrally arranged to facilitate maintenance such as maintenance and inspection from the ground level.

In addition, in the above embodiment, FIG.
As shown in FIG. 1, if an intercooler IC is provided in series so as to overlap with the radiator 18 of the first space 81 shown in FIG. 1, the seal cover is provided in the same manner as the intake hose 42 shown in FIGS. First side partition wall W of the above base that penetrates K3
As shown in FIG. 6, it can be supported by the bolt BT through the bracket BK directly arranged in the fb1 and the expanded first side partition wall Wfb2.

Alternatively, since the intake hose 42, the supercharger TB, and the hoses TPa, TPb can be arranged in a compact arrangement, the cooling air and the combustion of the engine 8 which flow effectively along the first side partition wall Wfb can be obtained. Air for use can be efficiently supplied. Further, as shown in FIG. 7, the space between the expanded first side partition wall Wfb2 and the engine 8 is widened, and maintenance of the engine 8 and the like cannot be performed. With this structure, the strength of the side partition Wfb can be improved.

Further, although the case where the oil cooler 22 is arranged between the operator room 10 and the radiator 18 has been shown in the above embodiment, the hydraulic oil tank 30 or the fuel tank 31 is arranged in place of the oil cooler 22. In the case where the engine 8 is installed in the right-left direction, the same operational effect as that of the above-described embodiment can be obtained. In the present embodiment, the fuel tank 31 and the hydraulic oil tank 30 are arranged on the other side b opposite to the one side 1a in the front-rear direction of the hydraulic excavator.

Further, as shown in FIG. 1, a rear partition wall Wc for separating the engine 8 from the hydraulic pump 16 is provided.
Partition walls W1 and W2 extending in the front-rear direction are provided from both sides of the radiator 18 in the front-rear direction of the hydraulic excavator. Further, the partition walls W1 and W2 provided on the side surfaces of the radiator 18 and the front first side partition Wfb extending from the side surface of the rear partition Wc in the front direction of the construction machine to the partition plate W1 and the construction described above. An engine room ER that surrounds the first cooling fan 20 and the engine 8 by the other side partition wall Wrb and the rear partition wall Wc that are provided at the rear side of the rear partition wall Wc in the rearward direction of the machine and extend to the partition plate W2. Is provided, and the radiator 18 and the first cooling fan 2 are provided.
0, high heat and noise from the engine 8 can be blocked as much as possible.

In the case of this embodiment, the other side partition Wrb also serves as the front surface 14a of the counterweight 14. Further, as shown by the solid line in FIG. 1, between the oil cooler 22 and one of the hydraulic oil tank 30 and the fuel tank 31, in the present embodiment, the oil cooler 22 and the hydraulic oil tank 30 are connected. Engine room E between
The control valve 28 for hydraulic oil is provided on the front side of the front first side partition Wfb of R.

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 as shown in FIGS. 1, 4, 5, 8 and 9. A cooling air outlet 60 through which cooling air sucked by the cooling fan 20 and cooling the radiator 18 and the engine 8 is discharged is provided, and an exhaust pipe 62 protruding from a muffler M for exhausting the engine 8 is provided.

Further, the radiator 18 of the upper cover 2uc of the upper swing body 2 and the cooling core 18K of the oil cooler 22,
On the front side of 22K, as shown in FIG. 8, cooling air inlets 64a, 6 for taking in cooling air from above are respectively provided.
4b is provided, and if necessary, the engine hood 1
A cooling air intake 64c is provided on the left side portion 17a of the vehicle 7.

Further, the radiator 18 and the oil cooler 22
A space SP common to the radiator 18 and the oil cooler 22 is provided below the cooling air intakes 64a and 64b of the upper cover 2uc. Further, as shown in FIGS. 8 and 9, an upper cover 2uc for covering the oil cooler 22, the second cooling fan 24, and the second driving means 26 and an upper part of the central portion so as to bridge the upper part of the hydraulic oil tank 30. Cover 2uc
Is provided.

The side cover 2sc on the left side of the hydraulic excavator has a door D1, which is provided on the rear side of the operator room 10 and the front side of the counterweight 14 so as to be openable and closable via hinges 46 and 48, respectively. D2 is provided. Then, as shown in FIG. 10, the doors D1 and D
Similarly to the above, the door D3 is also provided in the pump chamber PR on the opposite side of 2 via hinges 46 and 48 as shown in FIG.

As shown in FIGS. 8 and 9, when the hydraulic excavator operates, cooling air enters from at least one of the cooling air inlets 64a and 64c and passes through the common space SP. Arrow Z1 and arrow Z
After the radiator 18 and the engine 8 are cooled as shown in FIG. 2, the radiator 18 and the engine 8 are discharged from the cooling air outlet 60 as indicated by an arrow Z3.

Cooling air enters from the cooling air inlet 64b from the upper side to the lower side as indicated by arrow Z4 to cool the oil cooler 22 and then flows forward and rightward of the hydraulic excavator as indicated by arrow Z5. The oil tank 31 and the fuel tank 30 are discharged while being cooled. Also, pump room P
If R has outlets 46a and 46b, pump chamber PR
In addition, the circulation air flows from the second cooling fan 24 through the gap PS, cools the pump chamber PR, and the discharge port 46.
It is discharged from a and 46b.

Further, at least one of the fuel tank 31 and the hydraulic oil tank 30 disposed on the other side portion 1b opposite to the one side portion 1a, and the oil cooler 2
The surface shape of the one tank on the side opposite to the flow of the cooling air that has cooled 2 is the upper side or the front side in the right direction of the construction machine as shown by the guide surfaces indicated by the two-dot chain lines R1 and R2 in FIG. At least one of the two sides is provided with guide means RR for guiding the cooling air to improve the discharge efficiency of the cooling air.

That is, the guiding means RR of this embodiment is shown in FIG.
As shown in FIG. 5, the hydraulic oil tank 30 is formed of the guide surface R1 inclined upward from the lower portion, and the fuel tank 31 is formed of the guide surface R2 inclined forward from the rear portion.
It is not limited to this, and for example, the guide surfaces R1, R2
May be provided in both of the above tanks, or the guide surface R
1, R2 may be formed in a shape in which the guide surfaces R1 and R2 are superposed on one surface of the tank.

At this time, the side cover 2sc and the upper cover 2uc of the hydraulic pump chamber PR on the right rear side of the hydraulic excavator are provided.
When there is no opening in the pump chamber PR, which is closed by the side cover 2sc, the upper cover 2uc, and the counterweight 14, the pump chamber PR is removed.
The atmosphere fluid inside has cooled the oil cooler 22, arrow Z
The cooling air fluid flowing in the direction 5 causes the outlet P of the gap PS between the hydraulic oil tank 30 and the front side partition Wfb.
Since it is sucked out by the venturi effect via SM, exhausted, and ventilated, the temperature rise in the pump chamber PR is prevented.

Since the pump chamber PR is at least substantially sealed, it is possible to block the noise of the operation of the hydraulic pump 16. Further, if the cooling air outlet 60a is provided in the central upper cover 2uc and the cooling air is discharged in the direction of arrow Z6 as in the modification shown in FIG. 9, 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 shown.
If cooling air intakes 64d and 64e are provided in 1, D2,
Furthermore, the cooling effect can be improved. Further, even if the intercooler IC, the oil cooler 22 and the radiator 18 are arranged in series in the first space 81 shown in FIG. 4 and the air cleaner 32 is provided so as to be inclined away from the front surface of the cooling core as described above. The same effect as that of the embodiment shown in FIG. 4 can be obtained.

[0069]

As described above in detail, according to the cooling device for a construction machine of the present invention as defined in claim 1, a cooling device comprising a plurality of heat exchangers mounted on the construction machine, cooling the cooling device. A cooling fan, a driving means for operating the cooling fan, and an engine housed in an engine room for operating the construction machine, in a direction away from a front surface of a cooling core of the cooling device. An air cleaner disposed so as to incline toward the upper revolving structure side of the construction machine on the front side of the cooling core; and the air cleaner.
Provided in the cover of the construction machine in front of the intake pipe connecting the engine and the air cleaner for supplying the cooling air cleaned by the engine to the engine and the cooling core of the cooling device. Since the cooling air inlet for introducing the cooling air is provided, the cooling air can be easily and efficiently taken in from between the cooling core and the air cleaner.

According to a second aspect of the cooling apparatus for a construction machine of the present invention, in the configuration according to the first aspect, the engine room is provided between the engine and a hydraulic pump connected to the engine. A rear partition wall provided, one first side partition wall connecting one side part of the cooling device and one side part of the rear partition wall, and the other side part of the cooling device and the other of the rear partition walls. The cooling air can be smoothly supplied to the engine room, in addition to the effect of the first aspect, since the cooling air is connected to the other side partition wall.

According to a third aspect of the cooling apparatus for a construction machine of the present invention, in the configuration according to the first or second aspect, at least one of the plurality of heat exchangers is a first heat exchanger. Since the cooling device and the second cooling device composed of the remaining heat exchanger among the plurality of heat exchangers are arranged in parallel, in addition to the effect of claim 1 or 2, the first cooling device and It is possible to disperse the cooling devices and the cooling fans in the second cooling device so as to reduce the size of the cooling device and the cooling fan, and to improve the intake efficiency of both cooling devices.

According to a fourth aspect of the cooling apparatus for a construction machine of the present invention, in the configuration according to the third aspect, the cooling apparatus includes a first cooling apparatus and a second cooling apparatus, and the first cooling apparatus.
A cooling device, a cooling fan for cooling the first cooling device, a driving means for driving the first cooling fan, a first space portion in which the engine is arranged, the second cooling device, the second
The first side partition wall that restricts the flow of the cooling air that partitions between the second cooling fan that cools the cooling device and the second space where the drive unit that drives the second cooling fan is disposed is provided. Therefore, in addition to the effect of the third aspect, it is possible to prevent the cooling air from mixing between the first space portion and the second space portion, improve the intake efficiency, and cool the air.

According to a fifth aspect of the cooling apparatus for a construction machine of the present invention, in the configuration according to the second or fourth aspect, the first side partition wall is at least on both sides of the axis of the crankshaft of the engine. An expansion that is provided on either side and that is inclined in a direction that intersects with the axis away from the axis and that is configured to increase the space between one side of the engine and the first side partition wall Since the side partition wall is provided, in addition to the effect of claim 2 or 4, the pipe arranged on the front side of the cooling core of the cooling device can be arranged in the expansion side partition wall. The intake air for combustion of the engine can be improved, and the cooling air flow in the second space can be improved to improve the cooling effect of the hydraulic pump chamber.

According to a sixth aspect of the cooling apparatus for a construction machine of the present invention, in the structure according to any one of the first to fifth aspects, the intake pipe is provided on the outer periphery of the cooling apparatus. A penetrating through the cover and disposed in the first side partition wall and the other side partition wall and attached to at least one of the first side partition wall and the other side partition wall by a mounting member. Since it is supported, in addition to the effect of any one of claims 1 to 5, the piping around the engine can be simplified and made compact, and the cooling effect can be improved.

According to a seventh aspect of the cooling apparatus for a construction machine of the present invention, in the structure according to the fourth aspect, the first arrangement is provided on both left and right sides of the axis of the crankshaft of the engine.
The first space portion is configured by the side partition wall and the other side partition wall, and the rear partition wall that separates the hydraulic pump connected to the engine from the engine. In addition, the engine room and the pump room are isolated from each other and cooled separately, and noise leakage can be reduced.

According to the eighth aspect of the cooling apparatus for a construction machine of the present invention, in the configuration according to any one of the first to seventh aspects, the direction is between the cooling core of the cooling apparatus and the air cleaner. Since the cooling air intake is provided on the upper cover or the side cover of the upper swing body of the construction machine so that the cooling air is supplied toward
In addition to the effect according to any one of claims 1 to 7, from an intake port provided in an upper cover or a side cover of the upper revolving structure toward a direction between a cooling core of the cooling device and the air cleaner. The cooling air can be supplied to improve the cooling effect.

According to a ninth aspect of the cooling apparatus for a construction machine of the present invention, in the configuration according to any one of the first, fourth and seventh aspects, there is a space from the first side partition wall. The second side partition wall, which is arranged so as to form a cooling air circulation port and is surrounded by the rear partition wall and constitutes the hydraulic pump chamber, is provided. In addition to the effect, the presence of the circulation port can improve the cooling of the hydraulic pump chamber.

According to the cooling device for a construction machine of the present invention described in claim 10, in the structure described in claim 9, the cooling air from the second cooling fan is introduced through the flow port and the hydraulic pump chamber. The hydraulic pump chamber can be effectively cooled in addition to the effect of the ninth aspect, because it is configured to be discharged from the discharge port provided in the partition wall surrounding the.

According to an eleventh aspect of the cooling device for a construction machine of the present invention, in the configuration according to any one of the fourth to tenth aspects, the cooling device is provided on the front side of the cooling core of the cooling device, Since the air intake duct for guiding the circulation of the cooling air to the first space portion and the second space portion is provided, in addition to the effect of any one of claims 4 to 10, it is introduced more effectively by the air intake duct. can do.

According to the cooling apparatus for a construction machine of the present invention as defined in claim 12, in the structure as defined in any one of claims 4 through 11, the first space portion and the second space portion of the suction duct are provided.
5. The front third side partition wall for partitioning the space portion is configured integrally with or separately from the first side partition wall.
In addition to any one of the effects 1 to 11, in the case of the above-mentioned integrated body, there is an advantage that the assembly and disassembly work can be performed in a single operation, and in the case of a separate body, handling during the assembly and disassembly work. Will be easier.

According to a thirteenth aspect of the cooling apparatus for a construction machine of the present invention, in the configuration according to the twelfth aspect, the first side partition wall of the front portion is set according to design specifications.
Since it is arranged with a space from the side partition wall,
In addition to the effect of (2), the amount of fluid can be adjusted by the pressure difference of the fluid flowing through the first and second spaces, and the distribution to both spaces can be easily performed without making a large design.

According to the cooling device for a construction machine of the present invention as set forth in claim 14, in the structure of claim 12 or 13, the third side partition wall of the front part is an auxiliary side partition wall of which the length can be adjusted. Since it is provided, in addition to the effect of claim 12 or 13, the amount of fluid can be adjusted by the fluid pressure difference between the first and second spaces, and the space for both spaces can be adjusted without a large design. Allocation can be done easily.

According to the cooling apparatus for a construction machine of the present invention described in claim 15, in the structure described in any one of claims 4, 11, 12, 13, 14, the intake duct of the second space portion. Comprises at least a guide member for guiding the cooling air provided downstream of the second cooling device of the construction machine.
In addition to the effect of any one of 4 above, cooling air can be guided to the guide member in a desired direction.

According to the cooling apparatus for a construction machine of the sixteenth aspect of the present invention, the operator room is provided at one side of the front end of the construction machine in the front-rear direction, and the operator room is provided at the rear of the construction machine. An engine horizontally disposed between the counterweight and the operator room, to which the hydraulic pump is connected, a radiator for cooling water of the engine, which is disposed in front of the engine, and hydraulic oil for the construction machine. One of the oil coolers, a first cooling fan that cools the one first cooling device, a driving unit that drives the first cooling fan, and the one first cooling device. An air cleaner disposed on the front side of the apparatus so as to incline in a direction away from the front surface of the cooling core of the first cooling device, on the side of the upper revolving structure of the construction machine on the front side of the cooling core; Above air Li - the engine for supplying cooling air cleaned with Na to the engine and the air cleaner -
Since it is provided with an intake pipe that connects the cooling air and a cooling air intake port that is provided in the cover of the construction machine, the cooling air intake port is easily provided even between the cooling core and the air cleaner. Cooling air can be taken in efficiently.

According to a seventeenth aspect of the cooling apparatus for a construction machine of the present invention, in the configuration according to the sixteenth aspect, the cooling apparatus is arranged at a rear portion of the operator room between the one first cooling apparatus and the operator room. A second cooling device for cooling the other second cooling device of the radiator and the oil cooler, and a second cooling fan for cooling the other second cooling device;
Since the driving means for driving the cooling fan is provided, the radiator and the oil cooler can be efficiently cooled in addition to the effect of claim 16.

According to the eighteenth aspect of the cooling apparatus for a construction machine of the present invention, in the configuration of the sixteenth or seventeenth aspect, the intake hose connected from the air cleaner to the engine is the first cooling apparatus and the first cooling apparatus. Since it is provided so as to pass between the two cooling devices or the upper part of the cooling device, in addition to the effect of claim 16 or 17, the intake hose from the air cleaner to the intake side on the engine side is connected to the radiator. It is provided so as to pass through between the oil cooler and the radiator, and the radiator surface area can be replaced with an enlarged one, so that the cooling performance of the radiator can be improved.

According to the cooling device for a construction machine of the present invention as defined in claim 19, any one of claims 1, 8, 16 and 18 is applicable.
In the structure according to the paragraph (1), the air cleaner is attached through a bracket attached to the upper cover side of the upper swing body of the construction machine.
In addition to the effect of any of 6 and 18, maintenance of the air cleaner can be facilitated from the ground surface, and maintainability can be improved.

According to the cooling apparatus for a construction machine of the present invention as set forth in claim 20, in the structure as set forth in any one of claims 2 to 10, the cooling air for cooling the first cooling device is used for cooling the engine. After cooling, the cooling air discharged from a cooling air outlet provided above the engine room and cooling the second cooling device is at least one of the front side and the upper side of the construction machine. Since it is configured to be discharged to the engine, the engine room can be efficiently cooled in addition to the effect according to any one of claims 2 to 10.

According to the cooling device for a construction machine of the present invention described in claim 21, in the structure described in any one of claims 4 to 15, 16, any one of the first space portion and the second space portion is provided. The crab includes the intercooler provided independently of the plurality of other cooling devices.
In addition to the effect of any one of the items 5 and 16, the intercooler can be effectively cooled.

According to the cooling device for a construction machine of the present invention described in claim 22, claims 1, 4, 9, 10, 12, 13,
The construction according to any one of claims 14 and 16, wherein the intercooler is attached to the upper swing body of the construction machine in a substantially horizontal direction.
In addition to the effect of any one of 13, 14, and 16, the intercooler and other cooling devices are in a state of being separated from each other with a large gap, so that suction efficiency can be increased and cleaning can be performed efficiently. You can

According to the cooling apparatus for a construction machine of the present invention as set forth in claim 23, in the structure as set forth in claim 16, the one side of the operator room is at the rear side or the other side of the operator room. A surface shape of at least one of the fuel tank and the hydraulic oil tank disposed on the side portion and the surface of the one tank on the side facing the flow of the cooling air that has cooled the second cooling device is The guide means for guiding the cooling air is provided on at least one of the upper side and the front side of the construction machine.
In addition to the effect of 6, the cooling air can be easily and efficiently taken in from between the cooling core and the air cleaner.

According to the cooling device for a construction machine of the present invention as defined in claim 24, any one of claims 1, 4, 9, 10, 12, 13,
In the configuration according to any one of 14 and 16, an air cleaner for the engine combustion air, which is disposed on the front side of the cooling core of the cooling device, and an intake pipe connecting the air cleaner and the engine. An intake device having the intake pipe supported on a side partition wall of the engine room is provided, so that the intake pipe is provided.
In addition to the effect of any one of the items 3, 14, and 16, the intake hose of the air cleaner temporarily penetrates the lower partition on the downstream side of the oil cooler, which is shown in the related art, and further extends to the front of the engine room. Although it is arranged so as to pass through the first side partition wall and detour so as to enter the engine room, in the present embodiment, as described above, between one side of the engine and the first side partition wall. It is possible to improve the intake efficiency by being provided so as to directly penetrate into the space, and to effectively utilize the limited space in the cover of the upper revolving structure without waste. Further, if the intake pipes are directly arranged in the expanded first side partition wall having the increased space in the same arrangement as described above, the flow of the cooling air is improved and the combustion air is also cooled to improve the intake efficiency. be able to.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention, in which the cooling device for a construction machine of the present invention is applied to a hydraulic excavator, and a plurality of cooling devices mounted on the hydraulic excavator are arranged in parallel. It is a schematic plan view which shows a case.

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

FIG. 3 is a schematic detailed explanatory view showing a state similar to FIG.

FIG. 4 is a schematic explanatory view showing a state similar to that of FIG. 1 when an intercooler is arranged in series in the radiator of FIG.

FIG. 5 is a schematic explanatory view seen from diagonally above with the first side partition wall of FIG. 4 removed.

6 is a schematic explanatory diagram showing a cross section taken along line 6a-6A of FIG. 4. FIG.

FIG. 7 is a schematic explanatory diagram showing a cross section taken along line 7A-7A in FIG.

FIG. 8 is a schematic perspective view of a hydraulic excavator showing the flow of cooling air for the radiator and the oil cooler of FIG.

FIG. 9 is a schematic explanatory diagram showing a modification of FIG.

FIG. 10 is a schematic perspective view showing a state in which the intercooler is horizontally arranged on the upper swing body.

FIG. 11 is a schematic diagram showing the relationship between the first side partition wall shown in FIG. 1 and an auxiliary third side partition wall provided in the intake duct.

FIG. 12 is a schematic explanatory view showing a plane of a conventional hydraulic excavator.

[Explanation of symbols]

1 Undercarriage 2 Upper revolving structure 2sc side cover 2uc top 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 Drive means 22 Oil cooler 24 Second cooling fan 28 Control valve 30 hydraulic oil tank 31 Fuel tank 32 air cleaner 34 elements 35 clips 36 Outside air layer 38 elements 40 Intake layer 46,48 hinges 50 side lid 60, 60a Cooling air outlet 64a-64c Cooling air intake 64d, 64e Cooling air intake K1 to K5 seal cover M muffler R guidance means W partition W1-W5 partition plate Wa front partition Wfb first side partition Wfb2 Extended side partition Wrb Other side partition Wc rear bulkhead IC intercooler

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Akitoshi Nishikawa             4-10-1, Yoga, Setagaya-ku, Tokyo             Within Mitsubishi Corporation (72) Inventor Yoshihiko Hayashi             4-10-1, Yoga, Setagaya-ku, Tokyo             Within Mitsubishi Corporation F-term (reference) 2D015 CA02                 3D038 AA10 AB09 AC03 AC21 BA12                       BB09 BC03 BC14

Claims (24)

[Claims] 1. A cooling device comprising a plurality of heat exchangers mounted on a construction machine, a cooling fan for cooling the cooling device, driving means for operating the cooling fan, and the construction machine housed in an engine room to operate the construction machine. In a cooling device for a construction machine including an engine, the cooling device is arranged on the upper revolving structure side of the construction machine on the front side of the cooling core so as to incline in a direction away from the front surface of the cooling core of the cooling device. An air cleaner, an intake pipe connecting the engine and the air cleaner for supplying cooling air cleaned by the air cleaner to the engine, and cooling provided in a cover of the construction machine. A cooling device for a construction machine, comprising: a cooling air intake for introducing air. 2. The engine room includes a rear partition provided between the engine and a hydraulic pump connected to the engine, one side of the cooling device, and one side of the rear partition. One first side partition wall connecting the
The cooling device for a construction machine according to claim 1, wherein the cooling device is configured by the other side partition wall that connects the other side portion of the cooling device and the other side portion of the rear partition wall. 3. A first cooling device including at least one heat exchanger among the plurality of heat exchangers, and a second cooling device including the remaining heat exchangers among the plurality of heat exchangers. The cooling device for a construction machine according to claim 1 or 2, wherein and are arranged in parallel. 4. The cooling device comprises a first cooling device and a second cooling device, the first cooling device, a cooling fan for cooling the first cooling device, a driving means for driving the first cooling fan, A second space in which a first space portion in which the engine is arranged, the second cooling device, a second cooling fan that cools the second cooling device, and a drive unit that drives the second cooling fan are arranged The first side partition wall that regulates the flow of the cooling air that partitions the space between
The cooling device for a construction machine according to claim 3. 5. The first side partition is provided on at least one of both sides of an axis of a crankshaft of the engine, and is inclined in a direction intersecting with the axis and away from the axis. The cooling device for a construction machine according to claim 2 or 4, further comprising an expansion side partition wall configured to increase a space between one side of the first side partition wall and the first side partition wall. 6. The intake pipe penetrates a seal cover provided on the outer periphery of the cooling device and is disposed in the first side partition wall and the other side partition wall, and the first side partition wall and the other side partition wall. The cooling device for a construction machine according to claim 1, wherein the cooling device is supported by at least one of the other side partition walls by a mounting member. 7. The first side partition wall and the other side partition wall, which are arranged on both the left and right sides of the axis of the crankshaft of the engine, separate the hydraulic pump connected to the engine from the engine. The cooling device for a construction machine according to claim 4, wherein the first partition is constituted by the rear partition wall. 8. The cooling air provided on an upper cover or a side cover of the upper revolving structure so that the cooling air is supplied in a direction between a cooling core of the cooling device and the air cleaner. The cooling device for a construction machine according to claim 1, further comprising an intake port. 9. A second side partition wall, which is arranged so as to form a cooling air flow opening at a distance from the first side partition wall and is surrounded by the rear partition wall and constitutes the hydraulic pump chamber. It is provided with any one of Claim 1, 4, 7 characterized by the above-mentioned.
The cooling device for a construction machine according to the item. 10. The cooling air from the second cooling fan is introduced through the flow port and is discharged from a discharge port provided in a partition wall surrounding the hydraulic pump chamber. The cooling device for a construction machine according to claim 9. 11. An air intake duct provided on the front side of a cooling core of the cooling device, the air intake duct guiding the circulation of the cooling air to the first space portion and the second space portion. A cooling device for a construction machine according to any one of claims 4 to 10. 12. The front third side partition wall for partitioning between the first space and the second space of the suction duct is the first partition.
The cooling device for a construction machine according to any one of claims 4 to 11, wherein the cooling device is constructed integrally with or separately from the side partition wall. 13. The construction according to claim 12, wherein the third side partition wall of the front portion is arranged with a gap from the first side partition wall set according to design specifications. Mechanical cooling system. 14. The cooling device for a construction machine according to claim 12, wherein the third side partition wall of the front portion is provided with an auxiliary side partition wall whose length is adjustable. 15. The intake duct of the second space portion is provided with a guide member for guiding the cooling air, which is provided at least on the downstream side of the second cooling device of the construction machine. , 11, 12, 13, 14 is a cooling device for a construction machine. 16. An operator's room arranged on one side of a front end portion of the construction machine in the front-rear direction, and a transverse arrangement between a counterweight provided on the rear part of the construction machine and the operator's room. And an engine to which the hydraulic pump is connected, and a first cooling device which is arranged on the front side of the engine and which is one of a radiator for cooling water of the engine and an oil cooler for hydraulic oil of the construction machine, A first cooling fan for cooling the one first cooling device, driving means for driving the first cooling fan, and a front side of the cooling core of the cooling device on the front side of the one first cooling device. An air cleaner disposed in the upper revolving structure of the construction machine on the front side of the cooling core so as to be inclined in a direction away from the cooling core, and the cooling air cleaned by the air cleaner is supplied to the engine. A cooling device for a construction machine, comprising: an intake pipe connecting an engine and the air cleaner; and a cooling air intake port for introducing cooling air provided in a cover of the construction machine. . 17. A second cooling device of the other one of the radiator and the oil cooler, which is arranged at a rear portion of the operator chamber, between the one first cooling device and the operator chamber, and the other one of the radiator and the oil cooler. Second cooling the second cooling device of
The cooling device for a construction machine according to claim 16, further comprising a cooling fan and a driving unit that drives the second cooling fan. 18. An intake hose connected from the air cleaner to the engine is provided so as to pass between the first cooling device and the second cooling device or pass above the cooling device. The cooling device for a construction machine according to claim 16 or 17. 19. The air cleaner is attached via a bracket attached to the upper cover side of the upper revolving structure of the construction machine.
The cooling device for a construction machine according to any one of 6 and 18. 20. The cooling air that has cooled the first cooling device 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 cooling device is the above-mentioned. The construction machine according to any one of claims 2 to 10, wherein the construction machine is configured to be discharged to at least one of a front side and a lateral upper side of the construction machine. Cooling system. 21. An intercooler provided independently of the plurality of other cooling devices is provided in either the first space portion or the second space portion. The cooling device for a construction machine according to claim 1. 22. The intercooler is attached to the upper revolving structure of the construction machine substantially horizontally, and the intercooler is substantially horizontal.
The cooling device for a construction machine according to any one of 6 above. 23. At least one of a fuel tank and a hydraulic oil tank disposed behind the operator chamber on one side or on the other side opposite to the one side. And the surface shape of the one tank on the side facing the flow of the cooling air that has cooled the second cooling device, the cooling air being provided on at least one of the lateral upper side and the front side of the construction machine. The cooling device for a construction machine according to claim 16, further comprising a guiding means for guiding. 24. An air cleaner for the engine combustion air, which is arranged on a front side of a cooling core of the cooling device, and an intake pipe connecting the air cleaner and the engine, wherein the intake pipe is the engine. The cooling device for a construction machine according to any one of claims 1, 4, 6, 16, 22, and 24, comprising an intake device supported on a side partition wall of the room.