JP2001073406A - Separate cooling structure of engine and cooler - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the cooling performance of an engine of construction machinery and agricultural machinery such as a hydraulic shovel, a self-loader, a bulldozer, a wheel loader, a crawler-type loader (hereinafter, referred to as construction machinery), and to improve the maintenance thereof while facilitating fixing and unfixing of elements of an intake air cleaner in the separate cooling structure of an engine and cooler. SOLUTION: A cab 10 is provided at a front end 1a of construction machinery in the fore-and-aft direction thereof, and a cooler 100 for operation of the construction machinery is provided between an engine 8 arranged in the rear of the cab 10. An intake air cleaner 22 of the engine 8 is provided in a recessed part 15 provided in a loading material 14 of the engine 8 arranged in the rear of the construction machinery so that at least one part thereof is housed therein, and an element 38 of an air cleaner 32 can be easily exchanged.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a separate cooling system for an engine / cooler for construction machines such as hydraulic shovels, self-loaders, bulldozers, wheel loaders, crawler-type loaders, agricultural machines, etc. (hereinafter simply referred to as construction machines). Regarding the structure.

[0002]

2. Description of the Related Art Construction machines such as hydraulic excavators, self-loaders, bulldozers, wheel loaders, and crawler-type loaders are known.
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, an upper revolving body 2 rotatably disposed above the lower traveling body 1 as shown in FIG. 3 with a working device 6 provided for performing various tasks
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.

Further, 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 hydraulic excavator and the operator room 10. A radiator 18, an engine 8 for cooling the radiator 18, a hydraulic motor, or an electric motor,
1 is connected to the first cooling fan 20 driven by
In the present embodiment, it is driven by the engine 8.

As shown in FIG. 6, an oil cooler 22 for cooling hydraulic oil of the hydraulic shovel is provided between the counterweight 14 and the operator room 10, and a second cooling system for cooling the oil cooler 22. Driving means 26 for driving the fan 24 and the second cooling fan 24 is provided.
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 ² hydraulic oil is supplied to control valve 2
8 to be transmitted to the above-described devices to be converted into low-pressure oil.
And the work is again performed by the hydraulic shovel circulated by the hydraulic pump 16.

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 filtered from 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
It is necessary to climb up to the upper cover 2uc of the excavator at the time of maintenance and inspection such as replacement of the element 38, and it is not easy to work at a high place where the scaffold is poor.

In view of the above, the arrangement position of the air cleaner 32 of the conventional device is, for example, as shown in FIG. 6, provided with 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 attached and detached. And it is provided so that it may be located at the height of the eyes assuming a mechanic of average height. Further, as shown in FIG. 6, hinges 46, 4 are provided on the operator room 10 side and the counter weight 14 side.
The left side cover 2sc of the hydraulic excavator is constituted by doors D1 and D2 so that they can be pivotally supported and opened and closed in a double-opening manner via the doors 8 through 8.

At the time of the above maintenance and inspection, the maintenance person opens the doors D1 and D2 and opens the side cover 5 of the air cleaner 32 from the ground.
0 and the casing 34, the opening / closing means 35 such as a clip or a thumb screw, which is not shown in detail but is detachable, is provided between the casing 34 and the side cover 50.
And the element 40 can be easily replaced in the direction of the arrow P shown in FIG.

[0011]

However, the current arrangement of the above-described conventional hydraulic excavator is the radiator 1
8. Since the oil cooler 22 is disposed separately in the front-rear direction of the vehicle, it is necessary to change the specification to, for example, an ultra-small turning machine (a working machine capable of turning even in a narrow place by eliminating the protrusion at the rear of the vehicle body). In this case, it is difficult to reduce the turning radius of the rear end and the length of the vehicle width of the construction machine.

If the size of the engine is reduced, the performance is affected. Moving the air cleaner 32 to another place may cause a maintenance problem (access from the ground or the like). In addition, in order to reduce the operation noise of the construction machine and the emission control of the engine 8 strictly, and to reduce the emission of nitrogen oxides, for example, when the combustion temperature of the engine 8 is lowered, the exhaust temperature is increased until the latter stage of the combustion stroke. Therefore, the cooling loss of the engine is increased and the temperature of the cooling water of the engine 8 is increased as compared with the related art. Therefore, it is necessary to increase the cooling performance of the radiator 18 in order to lower the temperature of the cooling water. .

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 and the length in the vehicle width direction become longer, so that the turning radius becomes longer and narrower. The work on the construction site cannot be performed, and the work area is restricted.

If the radiator 18 is extended downward, the ground height of the hydraulic excavator becomes too low. At the entrance of the building demolition site, debris of reinforced concrete steel and rocks and large trees at construction sites such as tunnels and dams are damaged by the hydraulic pressure. The shovel cannot be extended downward because it may push up the floor. Also, if the radiator 18 is extended upward, the rear view becomes poor, and the center of gravity of the hydraulic excavator may become high and unstable, so that the hydraulic shovel cannot be made too high.

On the other hand, when the core layer of the radiator 18 is made thick to increase the amount of cooling water, not only does the flow resistance of the cooling air increase, but also the length in the vehicle width direction increases, violating the regulations of the Road Traffic Law. As a result, it becomes impossible to transport the vehicle by traveling on a general road with the hydraulic excavator mounted on a truck. In the prior art shown in FIG. 6, since the outlet opening 3 of the right side cover 2sc is provided, the operating noise of the engine 8, the hydraulic motor 16 and the like is transmitted to the outside and causes noise. ing.

The present invention has been made in view of these problems. An operator room is provided at the front end of the construction machine in the front-rear direction, and the construction machine is disposed between the operator room and an engine disposed behind the operator room. An operation air cooler is provided, and an intake air cleaner for the engine is provided so that at least a part of the recess is provided in a mount provided on a rear part of the construction machine of the engine, and an element of the air cleaner is provided. It is an object of the present invention to provide a separate cooling structure for an engine / cooler that allows easy replacement of the engine.

[0017]

Therefore, the engine / cooler separate cooling structure according to the first aspect of the present invention includes an operator room disposed at a front end in the front-rear direction of the construction machine, and an operator room provided at the front end of the operator room. An engine disposed rearward, a cooler for operating the construction machine disposed between the engine and the operator room, a cooling fan for cooling the cooler, and driving the cooling fan A driving unit, a mounted component disposed on the rear side of the engine of the construction machine, and an air cleaner for intake of the engine disposed at least partially in a recess provided in the mounted component. Wherein the air cleaner element is configured to be inserted and removed from the recess.

According to a second aspect of the present invention, there is provided an engine / cooler separate cooling structure according to the present invention, wherein an operator room disposed on one side of a front end portion of the construction machine in the front-rear direction and a rear side of the operator room. An engine connected to a hydraulic pump, a cooling machine for operating the construction machine disposed between the engine and the operator room, a cooling fan for cooling the cooling machine, Drive means for driving a fan, a load disposed behind the engine of the construction machine, and intake air of the engine disposed at least partially in a recess provided in the load. And an air cleaner for the air cleaner, wherein an element of the air cleaner provided in the concave portion can be inserted and removed.

According to a third aspect of the present invention, there is provided an engine / cooler separate cooling structure according to the first or second aspect, wherein the recess is provided on the front side of the engine and provided on the load. The air cleaner is provided so that at least a part of the air cleaner enters the air cleaner. According to a fourth aspect of the present invention, in the engine / cooler separate cooling structure according to any one of the first to third aspects, the cooler operates the intercooler, the radiator of the engine and the construction machine. It is characterized in that it is at least one of the coolers of an oil cooler for oil.

According to a fifth aspect of the present invention, there is provided an engine / cooler separate cooling structure according to any one of the first to fourth aspects, which is disposed between the engine and the operator room. And at least one of the coolers of the intercooler, radiator, and oil cooler, wherein at least one of the coolers extends to the front side of the engine to be effective. It is characterized in that the cooling area can be enlarged.

According to the sixth aspect of the present invention, there is provided an engine / cooler separate cooling structure according to the first, second, fourth and fifth aspects.
In the configuration according to any one of the above, the load is constituted by a counterweight of the construction machine. The engine of the present invention according to claim 7.
The separate cooling structure of the cooler is described in claims 1 to 3 and 6.
In the configuration according to any one of the above, an engine room surrounding the engine with a partition wall, an exhaust outlet end of an exhaust pipe of the engine disposed in the engine room, and at least the exhaust outlet end And a suction pipe provided in a partition of the engine room and protruding longer than the end of the exhaust outlet at an interval, and heated air in the engine room using the exhaust pressure of the engine. Is sucked and discharged to the outside.

According to an eighth aspect of the present invention, there is provided an engine / cooler separate cooling structure according to the seventh aspect, further comprising an intake port provided in at least one of the partition walls of the engine room. It is characterized by having. According to a ninth aspect of the present invention, there is provided the engine / cooler separate cooling structure according to the seventh or eighth aspect, wherein the engine room surrounding the periphery of the engine by a partition wall and the cooling air that cools the engine are formed by the cooling air. Cooling air discharged from a cooling air outlet provided above the engine room and cooling the cooler is discharged to at least one of a front side and a side upper side of the construction machine. It is characterized by being constituted.

According to a tenth aspect of the present invention, there is provided an engine / cooler separate cooling structure according to any one of the second, seventh and ninth aspects, wherein the one side portion of the operator room has a rear side or a rear side. At least one of a fuel tank and a hydraulic oil tank disposed on the other side opposite to the one side, and the tank on the side facing the flow of cooling air that has cooled the cooler. And a guiding means for guiding the cooling air to at least one of the side upper side and the front side of the construction machine, the surface being configured by at least one of the tanks. It is characterized by:

According to the eleventh aspect of the present invention, there is provided an engine / cooler separate cooling structure according to the first, second, tenth, and tenth aspects.
In the configuration according to any one of the above, a hydraulic pump for hydraulic oil connected to the engine is provided, and any part of a side wall of a hydraulic pump chamber provided to accommodate the hydraulic pump is opened. A cooling fan for cooling a cooler in which at least one of the coolers is disposed outside an engine room surrounding the engine with a partition wall, and cooling the cooler from the cooling fan It is characterized in that the heated air in the hydraulic pump chamber is discharged out of the hydraulic pump chamber through the opened portion of the side wall of the hydraulic pump chamber by the cooling air flow.

[0025]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows an embodiment of the present invention. FIG. 1 is a schematic plan view showing a case where an engine / cooler separate cooling structure of the present invention is applied to a hydraulic shovel. FIG. FIG. 3 is a schematic perspective view of a hydraulic shovel showing a flow of cooling air of a radiator and an oil cooler of FIG. 1, and FIG. 4 is a schematic explanatory view showing a main part of a cross section taken along line 4A-4A of FIG. , FIG.
FIG. 4 is a schematic explanatory view showing a state similar to FIG. 3, showing another embodiment of the present invention.

In the above-described hydraulic excavator, as shown in FIG. 1, an upper revolving unit 2 is rotatably mounted on a lower traveling unit 1, and a hydraulic pump 16 driven by an engine 8 having the hydraulic excavator mounted thereon. The high-pressure hydraulic oil from the hydraulic excavator is transmitted to the lower traveling unit 1, the upper revolving unit 2, the working device 6, etc. of the hydraulic excavator, and is connected to an oil cooler 22 for cooling the returned high-temperature hydraulic oil. I have.

The oil cooler 22 and radiator hoses 18a, 18 for cooling the cooling water of the engine 8 are provided.
The cooling machine 100 for operating the construction machine is provided with a radiator 18 connected by b and an intercooler IC for a supercharger provided as needed. In the present embodiment, an operator room 10 is provided at one side 1a of the front end of the construction machine in the front-rear direction, and a space between the counter weight 14 provided at the rear of the construction machine and the operator room 10 is provided. The engine 8 is provided horizontally and is connected to a hydraulic pump 16.

Further, an intercooler IC for a supercharger of the engine 8 disposed between the engine 8 and the operator room 10,
The cooling machine 100 includes at least one of the cooling water radiator 18 and the oil cooler 22 for operating oil of the construction machine. The cooling machine 100, a cooling fan 24 for cooling the cooling machine 100, and a cooling fan And a driving means 26 for driving the motor 24.

Further, in this embodiment, a counterweight 14 provided at the rear of the construction machine, which is mounted on the rear side of the construction machine near the front side of the engine 8.
Is provided with a concave portion 15. The concave portion 15 is provided with an air cleaner 32 for intake of the engine 8, and is configured such that an element 38 of the air cleaner 32 can be inserted and removed.

In the present embodiment, the front side of the engine 8 refers to one end of the crankshaft of the engine 8 and is not the front side of the construction machine but the front side of the engine 8 itself. In the horizontal engine as in the present embodiment, the front side of the engine 8 corresponds to the side of the construction machine.

The driving means for driving the cooling fan 24 is constituted by any one of a hydraulic motor, an electric motor and the engine 8. In the present embodiment, the driving means is driven by a hydraulic motor (not shown). Have been. The load is disposed in front of the engine 8 and is disposed in the recess 15 on the front side of the engine 8 such that at least a part of the load is disposed in the recess 15 provided in the counterweight 14. The intake air cleaner 32 provided is provided, and the element 38 of the air cleaner 32 provided in the recess 15 can be easily inserted and removed in the direction of arrow Q shown in FIG.

Further, the recess 15 is not limited to the portion shown in FIG. 1, and for example, as shown by a two-dot chain line in FIG. The air cleaner 32 is provided with the concave portion 15 configured as described above, and the door D is attached to the right side cover 2sc.
Even if 1 and D2 are provided, substantially the same operation and effect as the above embodiment can be achieved.

In addition to the above-mentioned counterweight 14, the above-mentioned load is placed in a recess 15 provided in a water tank or the like mounted at the rear of a wall treatment machine which is one of working machines such as the above-mentioned construction machines. Even when the element 38 of the air cleaner 32 can be inserted and removed as described above, the same operation and effect as described above can be achieved. Further, the air cleaner 32 is inserted into a part of the concave portion 15 of the counter weight 14 and is mounted by appropriate fixing means such as a bolt or a clip, but is not limited to this, and is shown in FIG. When cooling air is taken in from the front of the engine 8 as in the case of other embodiments, as shown by a two-dot chain line in FIG.
5 is mounted so as to be rotatable around a pivot shaft 34a provided at 5 to the position indicated by the solid line shown in FIG.

In the normal state of the construction machine, the recess 1 is used as much as possible, like the air cleaner 32a shown by the dotted line in FIG.
5 so as not to hinder the intake of the cooling air, and at the time of maintenance, inspection, etc., the air cleaner 32 is connected to the recess 15 through the pivot shaft 34a as shown by the solid line in FIG.
, And the element 38 can be inserted and removed in the Q direction, so that the above maintenance and inspection can be easily performed.

As shown in FIGS. 1 to 3, an intake hose 42 from the air cleaner 32 to the intake side of the engine 8 side.
As shown by a solid line and a dotted line in FIGS. 1 and 2, it is provided so as to penetrate the rear partition Wrb via a seal cover K4 described later, and is connected to the intake port of the engine 8. or,
A seal cover K3 is provided in a gap between the radiator 18 and the oil cooler 22, an intercooler IC provided as required, and a rear portion of the operator room 10.

Further, between the cooler 100 having at least one of the intercooler IC for the supercharger, the radiator 18 and the oil cooler 22 and the front side partition Wfb, there are seal covers K1 and K2. The partition wall plate W1 is provided, and the partition wall plate W1 is further provided with a partition wall plate W1a extending to the left side cover 2sc.
And W1a, an intercooler IC, a radiator 18,
A cooling air passage s of the oil cooler 22 is formed.

The above-mentioned partition plates W1 and W1a and the seal covers K1 to K3 allow the hot air discharged to the downstream side of the intercooler IC, the radiator 18 and the oil cooler 22 via the gaps of the above-described parts to flow upstream of the cooler 100. It has a sealing effect to prevent it from rewinding, for example, a high sealing effect such as urethane foam, sponge, rubber, etc.
It is formed of a heat-resistant flexible elastic material.

The engine 8 and the operator room 10
And at least one of the coolers 100 of the intercooler IC, the radiator 18 and the oil cooler 22 disposed between the cooler 100 and at least one of the coolers 100. As shown by the two-dot chain line in FIG. 1, the cooler 100 is extended along the front-rear direction of the construction machine in front of the engine 8 to increase the effective cooling area, thereby improving the cooling performance. Although it can be improved, in this case, the arrangement of the cooling fan 26 must be appropriately moved to the approximate center of the core of the cooler 100 (not shown) so that the cooling performance is not impaired.

The cooling effect can be increased by appropriately extending the cooling air inlets 64a, 64d along the cooling machine 100. Further, since the air cleaner 32 is disposed on the front side of the engine 8 and the air hose 42 passes through the rear side partition Wrb as described above, for example, the height shown in the conventional example shown in FIG.
By increasing the width of the radiator 18 by 0 mm by the length of the diameter of the air hose 42, the effective cooling area can be increased.

In addition to increasing the effective cooling area to improve the cooling efficiency of the radiator 18, the oil cooler 22, and the intercooler IC, the air cleaner 32 is mounted on the above-mentioned mounted object such as the counterweight 14 near the front side of the engine 8. By arranging in the recess provided, the doors D1 and D2 on the side of the upper revolving unit 2 are appropriately opened, and this type of clip, thumb screw, elastic force of the outer peripheral edge of the side lid 50, and the like are used. The side cover 50 can be attached and detached by the opening / closing means 35 normally used in the apparatus.

The element 3 of the air cleaner 32
1 can be inserted and removed in the direction of arrow Q in FIG. 1 for easy replacement, and when the element 38 is stored, the element 38 can be easily mounted in the casing 34 of the air cooler 32 in the reverse procedure to that described above. . In the above embodiment, the radiator 18, the oil cooler 22, and the intercooler IC are arranged on one side 1a between the operator room 10 and the engine 8, but the radiator 18, the oil cooler 22, and the intercooler IC are connected to the above. A radiator 18, an oil cooler 22, and an intercooler I disposed on the other side 1b of the construction machine and disposed behind the operator room 10 shown in FIG.
Even when the hydraulic oil tank 30 or the fuel tank 31 is provided in place of C, or when the engine 8 is provided in a left-right opposite direction, substantially the same operation and effect as the above embodiment can be obtained.

In the embodiment shown in FIG. 1, the fuel tank 31 and the hydraulic oil tank 30 are arranged on the other side 1b opposite to the one side 1a in the longitudinal direction of the excavator.
Are provided. The radiator 18, the oil cooler 22, and the surface shape of at least one of the fuel tank 31 and the hydraulic oil tank 30 on the side facing the cooling airflow that has cooled the cooler 100 of the intercooler IC. FIG. 3 shows two-dot chain lines G1 and G
Since the guiding means G for guiding the cooling air is provided on at least one of the right upper side Z6 and the front side Z5 of the construction machine like the guiding surface shown by 2, the cooling is performed. The air discharging efficiency can be improved.

That is, as shown in FIG. 3, the guiding means G of the present embodiment comprises a guiding surface G1 inclined upward from the lower part (slightly upward from the vertical plane) in the hydraulic oil tank 30.
The fuel tank 31 has a guiding surface G2 that is inclined forward from the rear (slightly forward with respect to the front-rear direction of the construction machine), but is not limited to this. The surfaces G1 and G2 may be appropriately provided in both the tanks, or the guide surfaces G1 and G2 may be formed in a shape in which the guide surfaces G1 and G2 are superimposed on one surface of the tank.

As shown in FIGS. 1 and 3, the engine 8
Partition wall Wc which is a partition wall separating the hydraulic pump 16 and the hydraulic pump 16
An upper cover 2uc that closes an upper opening formed between the right side cover 2sc of the upper swing body 2 of the hydraulic excavator and the rear partition Wc, and a rear partition Wc and the right side cover 2sc. The hydraulic pump chamber PR surrounded by the lower cover 2rc closing the lower opening formed therebetween and the front wall of the counterweight 14 is provided in the engine room E.
It is provided adjacent to R.

The right side 2sc of the hydraulic pump chamber PR, the rear partition Wc, and the upper cover 2uc
A gap PS set by design specifications between a hydraulic pump chamber PR formed by the lower cover 2rc and the front surface of the counterweight 14, and a hydraulic oil tank 30 between a side wall on the open front side of the construction machine and the hydraulic oil tank 30. It is configured to be able to.

Then, the heated atmospheric fluid in the hydraulic pump chamber PR is pushed out by the cooling air pressure that has cooled the radiator 18, the oil cooler 22, and the intercooler IC, and the outside air is released from a gap naturally formed in the configuration of the hydraulic pump chamber PR. Penetrates, and the heated cooling air in the hydraulic pump chamber PR is ventilated. Further, as shown in FIG. 3, while the atmospheric fluid of the heated cooling air in the hydraulic pump chamber PR flows to the arrows Z5 and Z6 of the cooling air that has cooled the cooler 100 by the above-described guide surfaces G1 and G2 and the like. Through the gap PS between the hydraulic oil tank 30 and the open side wall of the hydraulic pump chamber PR and the front side partition wall Wfb by the cooling air flow flowing in at least one of the directions described above. Since the air is sucked, discharged, and ventilated, the temperature of the hydraulic pump chamber PR can be prevented from rising.

That is, as shown in FIG. 1, the hydraulic pump chamber PR is provided with the right side cover 2sc,
The upper cover 2uc has no outlet opening 3 provided in the side cover 2sc for discharging the cooling airflow that has cooled the engine 8 and the hydraulic pump 16 of the conventional example shown in FIG. Since the outer wall side of the hydraulic pump chamber PR is substantially sealed by the cooperation of the unit cover 2sc, the upper cover 2uc, and the front surface of the counterweight 14, the hydraulic pump 1
6. Leakage of noise due to the operation of 6, etc. to the outside can be significantly reduced, and a low-noise construction machine can be obtained.

In the case of the present embodiment shown in FIGS. 1 and 4, the engine 8 is formed as a so-called enclosure in which the entire six sides of the engine 8 are surrounded by a partition wall W. In addition, the configuration is such that the operating noise of the engine 8 and the noise of the cooling air leak to the outside as little as possible. That is, as shown in FIG. 1, FIG. 3, and FIG.
a, the rear partition Wc, the front partition Wfb and the rear partition Wrb which are disposed so as to be bridged between the front partition Wa and the rear partition Wc (or can also be used as the counter weight 14). It consists of.

In the case of the engine room ER of the above-mentioned enclosure, for example, as shown in FIG. 4, a front partition Wa, a front partition Wfb, a rear partition Wrb, a rear partition Wc, and a bottom partition Wd. , The upper partition We (or the engine hood 17) and the like. Then, a turbocharger 102 is provided above the engine 8 as shown in FIG. 4, and the intercooler IC shown in FIG.
And the supercharged fluid cooled by the intercooler IC is supercharged to the engine 8.

Further, in addition to the above, in the exhaust system of the engine 8 as shown in FIG.
A muffler M is disposed in the engine room ER by using the engine exhaust pressure discharged to the outside in a part of the upper partition wall We of the engine room ER in which the outlet of the muffler M is disposed.
If an ejector EJ composed of an outer pipe and an inner pipe for sucking heated air inside and discharging it to the outside is provided, the engine room ER,
The engine 8 and the like can be cooled more effectively, and the cooling efficiency can be improved.

The ejector EJ includes an exhaust outlet end M1 of an exhaust pipe 8a extending from the muffler M as an inner pipe protruding from the muffler M, and an exhaust outlet end M1.
Pipe M2 as an outer pipe protruding from the engine room ER longer than the exhaust outlet end M1 with a space around
And a suction gap M3 formed between the exhaust outlet end M1 and the suction pipe M2 to suck air in the engine room ER.

If necessary, the above-mentioned ejector EJ
If a number of slit-shaped intake ports R1 are provided in the bottom partition wall Wd of the engine room ER located on the opposite side via the cooling air passage EY in the engine room to promote ventilation in the engine room ER, Cooling efficiency can be improved. The intake port R1 is provided in the engine room ER.
Noise suppression means N for suppressing leakage of engine noise to the outside
Each louver R is provided as S, and these louvers R are formed by being cut and raised from the respective air ports R1.

Further, although not shown, the noise suppressing means NS has a sound-absorbing effect at the intake port R1 formed in, for example, a box shape, and the engine noise and the intake noise leaking from the intake port R1 to the outside of the engine room ER. May be suppressed. Therefore, a negative pressure is generated around the engine exhaust flow ejected from the exhaust outlet end M1 of the exhaust pipe 8a provided in the engine 8, and the suction gap M3 is also negative. The air in the room ER can be sucked together with the heat and forcibly discharged to the outside.

When the above-mentioned ejector EJ alone is not sufficient, a small cooling fan 20 is placed at an appropriate place in the engine room ER as shown by a two-dot chain line in FIG.
May be provided. As described above, in each of the above-described embodiments of the present invention, as a method of reducing the rear end turning radius and the vehicle width of the construction machine, as described above, the cooler disposed on the front side of the engine 8, such as the radiator 18, The cooling fan 24 for the oil cooler 22 is arranged so as to share the cooling fan 24, and the air cleaner 32 is provided in the recess 15 provided in the counter weight 14 on the front side of the engine 8. The thickness of the core of the oil cooler 22 (the thickness in the vehicle width direction in FIG. 1) is reduced, and the radiator 18 and the oil cooler 2 are reduced.
2. The length in the width direction (the length in the front-rear direction of the vehicle in FIG. 1) of the intercooler IC provided as needed is increased.

Therefore, according to each of the above embodiments of the present invention, the number of cooling fans on the engine 8 side or a small-sized cooling fan can be used to turn the upper part of the conventional construction machine without significantly changing the specifications. Since the turning radius of the rear end of the body 2 and the vehicle width can be reduced, workability in a narrow space can be improved without increasing the cost.

Also, the side opening of the element 38 of the air cleaner 32 is directed in the vehicle width direction so that the side cover 50 is opened.
In addition to improving the maintainability such as attachment and detachment of the element 38 and replacement of the element 38, the air cleaner 32 is arranged so as to be at least partially inserted into the recess 15 of the counterweight 14, thereby creating a space in front of the engine 8. It is possible to reduce the length in the vehicle width direction and to reduce the size of the construction machine without increasing the outer shape of the construction machine, thereby increasing the effective cooling area of the cooler 100 and improving the cooling effect.

Next, another embodiment of the present invention will be described with reference to FIG. 5. The same parts as those in the above-described embodiment are denoted by the same reference numerals, and different points will be described. According to another embodiment of the present invention, as shown in FIG. 5, an engine room ER is provided, and a cooling air outlet 60 is provided in the engine hood 17 in place of the Ejuekta EJ of the engine room ER of the embodiment of FIG. .

As shown in FIG. 5, an engine hood 17 is provided on the upper side of the engine room ER, and on the right side of the engine hood 17 is a partition wall around the engine 8 as shown in FIG. Engine room ER surrounded by
The engine is sucked from a cooling air inlet 60c provided at at least one portion of the partition wall for taking in cooling air from above and a cooling air inlet 60b taken from above the upper cover 2uc downward. An outlet 60 for discharging the cooling air that has cooled the cooling air 8 is provided.

An exhaust pipe 62 projecting from an exhaust muffler M of the engine 8 is provided. As shown by a two-dot chain line in FIG. 1, a small cooling fan 20 is provided on the front side of the engine 8 provided as needed. or,
In the present embodiment, the intake of the cooling air in the engine room ER is provided in the cooling air intake 64c below the front partition Wa of the engine room ER and the bottom partition Wd of the engine room ER shown in FIG. At least one of the intake ports R1 is provided, and a cooling air inlet 64c is provided on the left side 17a of the engine hood 17 as necessary.

As shown in FIG. 5, a cooling air inlet 64a for taking in cooling air from above is provided on the front side of the radiator 18, the oil cooler 22, and the intercooler IC of the upper cover 2uc of the upper rotating body 2. Is provided. Also, as shown in FIGS. 1 and 5, the radiator 18,
Oil cooler 22, intercooler IC, cooling fan 2
4, an upper cover 2uc at the center of the construction machine is provided so as to cover an upper portion between a cooling device such as the driving means 26 and the like and the hydraulic oil tank 30 and to bridge between the two.

The left side cover 2sc of the hydraulic excavator is opened and closed via hinges 46 and 48 to open and close double doors D1 and D2 similarly to the above embodiment.
Are arranged.

As shown in FIG. 5, when the hydraulic excavator operates, cooling air flows from at least one of the cooling air inlet 64c and the cooling air inlet R1 via the cooling air inlet 64b. After the engine 8 is cooled down from below and enters the direction of arrows Z1 and Z2 to cool the engine 8, it is discharged from the cooling air outlet 60 as shown by the arrow Z3.

The cooling air from the cooling air inlets 64a and 64d enters the radiator 18, the oil cooler 22, and the intercooler I from the upper side to the lower side as shown by the arrow Z4.
After cooling C, the hydraulic fluid flows upward and forward of the hydraulic excavator as indicated by arrows Z5 and Z6, and is discharged while cooling the hydraulic oil tank 31 and the fuel tank 30. Also, one side 1a
The upper part of at least one of the fuel tank 31 and the hydraulic oil tank 30 arranged on the other side part 1b on the opposite side to the radiator 18, the oil cooler 22, and the upper part of the intercooler IC are bridged. The cooling air outlet 60a may be provided on the upper cover 2uc provided as shown in FIG. 5 as required by a dotted line to improve the cooling effect.

The radiator 18 and the oil cooler 2
2. The right side of the construction machine, as shown by the two-dot chain line in FIG. 5, the guiding surfaces G1 and G2 formed by the surface shape of the one tank on the side where the flow of the cooling air that has cooled the intercooler IC is opposite. A guiding means G for guiding the cooling air is provided on at least one of the front side Z5 and the upper side Z6 in the direction, so that the cooling is performed in the same manner as in the embodiment shown in FIGS. It improves the air discharge efficiency.

At this time, as in the above embodiment, the right rear side cover 2sc and the upper cover 2u of the hydraulic shovel are used.
Since there is no opening in c, a pump chamber PR in which at least the outer wall side of the hydraulic pump 16 is substantially sealed is formed by cooperation of the side cover 2sc, the upper cover 2uc, and the front surface of the counterweight 14, but the pump chamber PR The atmosphere fluid in the inside cools the cooler 100, and flows between the hydraulic oil tank 30 and the open side wall and the front side partition Wfb of the hydraulic pump chamber ER by the cooling air fluid flowing in the directions of arrows Z5 and Z6. Since the air is sucked, discharged, and ventilated via the gap PS between them, the temperature of the pump chamber PR can be prevented from rising.

Since at least the outer wall of the hydraulic pump chamber PR is substantially sealed, the noise of the operation of the hydraulic pump 16 can be cut off. When the cooling air is insufficient, as shown in FIG. 5, the cooling air inlets 64d and 64d are provided to the side cover 2sc and the doors AD1 and D2 of the excavator.
By providing 4e, the cooling effect can be further improved.

Although the hydraulic pump chamber PR described above has a substantially sealed configuration, the side cover 2sc and the upper cover 2uc of the hydraulic pump chamber PR as shown by a two-dot chain line in FIG.
Even if the cooling air outlet opening 3 is appropriately provided, the noise caused by the operation of the hydraulic pump 16 and the like cannot be reduced, but other effects such as improvement of the maintenance property of the air cleaner 32 are different from those of the above embodiment. Approximately the same function and effect can be obtained.

[0068]

As described in detail above, according to the engine / cooler separate cooling structure of the first aspect of the present invention, the operator room disposed at the front end in the front-rear direction of the construction machine, and the operator room , A cooling machine for operating the construction machine provided between the engine and the operator room, a cooling fan for cooling the cooling machine, and driving the cooling fan Driving means, a load disposed on the rear side of the engine of the construction machine, and a suction device for the engine disposed at least partially in a recess provided in the load. An air cleaner is provided, and the air cleaner element is configured to be able to be inserted into and removed from the recess.
By reducing the cooling fan for the radiator on the engine side, by arranging the cooling machine on the front side of the engine and arranging the air cleaner in the recess,
The turning radius of the rear end of the upper revolving structure of the construction machine and the vehicle width can be reduced, thereby improving workability in a narrow land without increasing the cost significantly.

That is, since the turning radius and the vehicle width of the rear end of the construction machine can be reduced, the construction machine can be used even in a narrow work site such as a tunnel or a residential area, which is a work site in the narrow space. In addition, by disposing the air cleaner in a recess provided in the load in front of the engine, the elements of the air cleaner can be easily replaced, and maintenance and inspection can be easily performed.

According to the engine / cooler separate cooling structure of the second 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 and the operator room disposed behind the operator room. An engine that is disposed horizontally and to which a hydraulic pump is connected, and a cooling machine for operating the construction machine that is disposed between the engine and the operator room;
A cooling fan that cools the cooler, a driving unit that drives the cooling fan, a load disposed behind the engine of the construction machine, and at least a part of a recess provided in the load. And an air cleaner for intake of the engine arranged so as to be able to fit therein, and the element of the air cleaner arranged in the recess can be inserted and removed, so that the cooling fan on the engine side is reduced. As a result, the turning radius of the rear end of the upper revolving structure and the vehicle width can be reduced, so that workability in a confined area can be improved without a large increase in cost.

Further, by directing the outlet of the air cleaner provided in the concave portion to the width direction of the vehicle, it is possible to improve the maintainability such as attaching and detaching the side cover of the air cleaner and replacing the element. According to a third aspect of the present invention, in the engine / cooler separate cooling structure according to the first or second aspect, the recessed portion provided on the front side of the engine and provided on the load is provided. Since the air cleaner is provided so that at least a part thereof enters, in addition to the effects of claim 1 or 2, the space for arranging the air cleaner is reduced, and the construction machine in the front-rear direction and the vehicle width direction is reduced. By reducing the length, the turning radius of the rear end of the upper revolving structure can be reduced, and the workability in a confined area can be improved without significantly increasing the cost.

According to the engine / cooler separate cooling structure of the present invention described in claim 4, in the configuration according to any one of claims 1 to 3, the cooler is provided with an intercooler, a radiator and the construction of the engine. Since it is at least one of the coolers of the oil cooler for the working oil of the machine, in addition to the effect of any one of claims 1 to 3, at least one of the coolers may be provided as necessary. One can be disposed between the operator and the engine, so that the length of the construction machine in the vehicle width direction can be reduced.

According to a fifth aspect of the present invention, in the engine / cooler separate cooling structure of the present invention, in the structure of any one of the first to fourth aspects, the engine / cooler is disposed between the engine and the operator room. And at least one of the coolers of the intercooler, radiator, and oil cooler, wherein at least one of the coolers extends to the front side of the engine to be effective. Since the cooling area is configured to be enlarged, in addition to the effects of any one of claims 1 to 4, it is possible to increase the effective cooling area of at least one of the cooling machines as necessary. The cooling capacity can be improved.

According to the separate cooling structure of the engine / cooler according to the sixth aspect of the present invention,
In the configuration according to any one of claims 4 and 5, the load is constituted by the counterweight of the construction machine. Air cleaner can be arranged compactly together with the counterweight.

According to the engine / cooler separate cooling structure of the present invention described in claim 7, claims 1 to 3,
6. The configuration according to any one of 6, wherein an engine room surrounding the engine with a partition wall, an exhaust outlet end of an exhaust pipe of the engine disposed in the engine room, and at least the exhaust outlet end. An ejector comprising a suction pipe provided in a partition of the engine room and protruding longer than the end of the exhaust outlet at intervals, and using the exhaust pressure of the engine to heat heated air in the engine room. Since it is configured to be sucked and discharged to the outside, in addition to the effects of any one of claims 1 to 3, each part in the engine room can be effectively cooled and the engine can be cooled. And the noise of the cooling fan can be reduced.

According to an eighth aspect of the present invention, in the engine / cooler separate cooling structure according to the seventh aspect of the present invention, in the configuration of the seventh aspect, an intake port provided in at least one of the partition walls of the engine room. Therefore, in addition to the effect of the seventh aspect, outside air can be taken in from the intake port to cool each part in the engine room more effectively.

According to the ninth aspect of the present invention, in the engine / cooler separate cooling structure according to the ninth aspect, in the configuration according to the seventh or eighth aspect, an engine room surrounding the engine by a partition wall, and cooling the engine is provided. Cooling air is discharged from a cooling air outlet provided above the engine room, and the cooling air that has cooled the cooler is at least one of a front side and a side upper side of the construction machine. The cooling air that cools the engine is effectively discharged from the cooling air outlet above the engine room. The cooling air that has cooled the cooler is discharged to the front side or the upper side of the construction machine, so that the cooling efficiency can be improved.

According to the separate cooling structure for the engine / cooler of the present invention described in claim 10, claim 2 is provided.
7. The fuel tank and the hydraulic oil tank according to claim 7, wherein the fuel tank and the hydraulic oil tank are arranged behind the operator room on one side or on the other side opposite to the one side. At least one of the tanks and the upper side of the construction machine, which is constituted by the surface shape of at least one of the tanks on the side facing the flow of the cooling air that has cooled the cooler, and 10. An inductive means for inducing the cooling air on at least one of the front sides, so that the cooling means is provided by the inducing means in addition to the effects of any of claims 2, 7, and 9. The cooling air that has been cooled can be discharged more smoothly and promptly, and the cooling of the relevant parts of the construction machine can be improved.

According to the eleventh aspect of the present invention, there is provided an engine / cooler separate cooling structure according to the first aspect.
In the configuration according to any one of Items 2 and 10, a hydraulic pump for hydraulic oil connected to the engine is provided, and any part of a side wall of a hydraulic pump chamber provided to accommodate the hydraulic pump is opened. In the meantime, a cooling fan for cooling a cooler provided with at least one of the coolers is provided outside an engine room surrounding the engine with a partition wall, and the cooler from the cooling fan is provided. The heated air in the hydraulic pump chamber is discharged to the outside of the hydraulic pump chamber through the opened portion of the side wall of the hydraulic pump chamber by the cooled cooling air flow. In addition to the effects of any one of the above items, the air is discharged by the cooling air pressure of the cooling air that has cooled the above-described cooler, and is naturally formed on the structure of the hydraulic pump chamber. More outside air intrudes can allowed to ventilate the heated cooling air in the hydraulic pump chamber.

[Brief description of the drawings]

FIG. 1 shows one embodiment of the present invention, and is a schematic plan view showing a case where an engine / cooler separate cooling structure 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 perspective view of a hydraulic shovel illustrating a flow of cooling air of a radiator and an oil cooler of FIG. 1;

FIG. 4 is a schematic explanatory view showing a main part of a cross section taken along line 4A-4A in FIG. 1;

FIG. 5 is a schematic explanatory view showing a state similar to FIG. 3, showing another embodiment of the present invention.

FIG. 6 is a schematic explanatory view showing a plane of a conventional hydraulic shovel.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Lower traveling body 2 Upper revolving superstructure 2sc Side cover 2uc Upper cover 2rc Lower cover 6 Working device 8 Engine 10 Operator room 14 Counter weight 16 Hydraulic pump 17 Engine hood 18 Radiator 20 Cooling fan 22 Oil cooler 24 Cooling fan 26 Drive means 30 Hydraulic oil tank 31 Fuel tank 32 Air cleaner 34 Element 35 Opening / closing means 36 Outside air layer 38 Element 40 Intake layer 46, 48 Hinge 50 Side cover 60, 60a Cooling air outlets 64a to 64c Cooling air inlets 64d, 64e Cooling air inlet ER Engine room K1 to K4 Seal cover M Muffler G Guiding means PR Hydraulic pump room W Partition wall W1 Partition plate W1a Partition plate Wa Front partition Wfb Front side partition Wrb Rear side partition Wc Rear partition Wd Bottom Partition walls We upper partition wall IC intercooler

Claims (11)

[Claims] 1. An operator room disposed at a front end of a construction machine in the front-rear direction, an engine disposed behind the operator room, and the engine disposed between the engine and the operator room. A cooling machine for operating the construction machine, a cooling fan that cools the cooling machine, a driving unit that drives the cooling fan, a load disposed on a rear side of the engine of the construction machine, An air cleaner for intake of the engine, which is arranged so that at least a part of the air cleaner is provided in a recess provided in the mounted object, wherein an element of the air cleaner can be inserted into and removed from the recess. The engine / cooler separate cooling structure. 2. An engine room disposed on one side of a front end in the front-rear direction of the construction machine, an engine horizontally disposed behind the operator room and connected to a hydraulic pump,
A cooling machine for operating the construction machine disposed between the engine and the operator room, a cooling fan for cooling the cooler, a driving unit for driving the cooling fan, A load disposed behind the engine, and an air cleaner for intake of the engine disposed so as to at least partially enter a recess provided in the load, and disposed in the recess. A separate cooling structure for an engine / cooler, wherein the element of the air cleaner is configured to be inserted and removed. 3. The air cleaner according to claim 1, further comprising: an air cleaner disposed on a front side of the engine and disposed so as to at least partially enter a recess provided in the load. Or the engine / cooler separate cooling structure according to 2. 4. The cooling device according to claim 1, wherein the cooling device is at least one of an intercooler, a radiator of the engine, and a cooling device of an oil cooler for hydraulic oil of the construction machine. The engine / cooler separate cooling structure according to any one of the above. 5. The apparatus according to claim 5, further comprising at least one of the intercooler, the radiator, and the oil cooler disposed between the engine and the operator room. The engine according to any one of claims 1 to 4, wherein at least one of the coolers is extended to the front side of the engine so that an effective cooling area can be enlarged. Cooler separate cooling structure. 6. The construction machine according to claim 1, wherein the load comprises a counterweight of the construction machine.
The engine / cooler separate cooling structure according to any one of 2, 4, and 5. 7. An engine room surrounding the periphery of the engine with a partition, an exhaust outlet end of an exhaust pipe of the engine disposed in the engine room, and at least a gap from the exhaust outlet end. An ejector that protrudes longer than the exhaust outlet end and that is provided with a suction pipe provided in a partition of the engine room, uses the exhaust pressure of the engine to suck heated air in the engine room and discharge the heated air to the outside The engine / cooler separate cooling structure according to any one of claims 1 to 3, wherein the engine / cooler separate cooling structure is configured to perform the following. 8. The engine / cooler separate cooling structure according to claim 7, further comprising an intake port provided at least in any part of said partition in said engine room. 9. An engine room surrounding the engine with a partition wall, and cooling air for cooling the engine is discharged from a cooling air outlet provided above the engine room to cool the cooling machine. 9. The engine / cooler separate according to claim 7, wherein air is discharged to at least one of a front side and a side upper side of the construction machine. Cooling structure. 10. A fuel tank and / or a hydraulic oil tank disposed at a rear side of the operator room on one side or on another side opposite to the one side. A surface shape of at least one of the tanks on the side facing the flow of the cooling air that has cooled the cooler, and at least one of a lateral upper side and a front side of the construction machine The engine / cooler separate cooling structure according to any one of claims 2, 7, and 9, further comprising a guiding means for guiding the cooling air on one side. 11. A hydraulic pump for operating oil connected to the engine is provided, and any part of a side wall of a hydraulic pump chamber provided to accommodate the hydraulic pump is opened, and the periphery of the engine is opened. A cooling fan that cools a cooler in which at least one of the coolers is disposed outside the engine room surrounded by the partition is provided, and a cooling air flow that cools the cooler from the cooling fan provides the cooling fan. 11. The hydraulic pump according to claim 1, wherein the heated air in the hydraulic pump chamber is discharged to the outside of the hydraulic pump chamber through an opened portion of the side wall of the hydraulic pump chamber. A cooling structure for a construction machine according to any one of the preceding claims.