JP2003193840A - Construction machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a construction machine capable of organically and effectively introducing cooling air for cooling a cooling device to cool an engine room, an engine, etc., effectively and to miniaturize the construction machine. <P>SOLUTION: This construction machine P is provided with a flow-in side pipe 43 and a flow-out side pipe 45 connected with an outer part in the backward direction in the construction machine P of the cooling device R, an air cleaner 41 arranged so as to be stored in a counterweight 10, and a pipe storage part 60 provided in the counterweight 10 to store the flow-in side pipe 43, the flow-out side pipe 45, and a pipe 41A of the air cleaner 41. The cooling air for effectively cooling the cooling device R arranged on either of sides in the left and right directions of the engine 32 is organically and effectively introduced to cool the engine room 13, the engine 32, a supercharger 40, etc., effectively and miniaturize the construction machine P. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wheel loader having a cooling device such as a radiator, an oil cooler, an aftercooler, a condenser, a hydraulic crane, a bulldozer, a hydraulic excavator, and other construction machines.

[0002]

2. Description of the Related Art Construction machines include, for example, dams, tunnels,
There is a hydraulic excavator for excavating earth and sand such as roads and water and sewers, and dismantling constructions. The hydraulic excavator is composed of a lower traveling body, an upper revolving body pivotably supported on the lower traveling body, and a work device provided in front of the upper revolving body.

A cab for an operator room of a working machine is usually provided on the above-mentioned upper swing body, but there are some mini hydraulic excavators which have no cab and only seats on which an operator is seated. Furthermore, on the frame of the upper revolving structure,
An engine, hydraulic pump, cooling device, battery, control valve, fuel tank, hydraulic oil tank, etc. are provided.

The construction machine performs work such as traveling by the lower traveling body, revolving by the upper revolving body, excavation by the working device, etc. Done. Further, the hydraulic pump operated by the engine supplies hydraulic pressure to the actuator.

Further, the cooling device is located near the engine and includes a radiator for cooling the cooling water from the engine, an undercarriage, an oil cooler for cooling the working oil for operating the working device, and the like. A first cooling device and a second cooling device such as an aftercooler, which is arranged upstream of the first cooling device so as to overlap with each other and cools compressed air from a supercharger installed in the engine, are provided. There is. An inflow pipe and an outflow pipe are connected to the first cooling device and the second cooling device, respectively, and these pipes are provided around the cooling device and the engine.

[0006]

However, in the hydraulic excavator which is the conventional construction machine described above, since a plurality of cooling devices are arranged, many of the inflow pipes, the outflow pipes and the like connected to the cooling device are often used. Since the pipes are arranged around the cooling device, the engine and the like, a space for arranging the pipes is required around the engine and the like.

Therefore, it is conceivable to move the counterweight rearward to widen the space around the engine, but the upper revolving superstructure rotates by the amount of the rearward movement of the counterweight. At this time, the radius of gyration (turning radius) increases and the work performance decreases. As described above, since the hydraulic excavator is configured so that the turning radius is as small as possible, there is a limit to the space that can be secured around the engine.

Therefore, in order to dispose the above-mentioned piping, it is necessary to change the arrangement of other equipment and downsize the other equipment, which leads to a decrease in assembly workability and maintenance workability and an increase in cost. I will let you. The present invention was devised in view of the above problems, and is mounted on a frame provided with a working device on the front side of a construction machine, and horizontally mounted on the rear side of the construction machine on the frame in the left-right direction. An engine, a counterweight attached to the rear end of the frame to balance with the working device, a cooling device provided on one side of the engine in the left-right direction, and a cooling device of the cooling device. The inflow side pipe and the outflow side pipe connected to the rearward outer side of the construction machine, the air cleaner arranged to be housed in the counterweight, the inflow side pipe, the outflow side pipe, and the above A construction machine provided with a pipe accommodating portion provided in the counterweight for accommodating air cleaner pipes,
Cooling air that effectively cools the cooling device disposed on one of the left and right sides of the engine is organically and effectively introduced to the engine room, the engine,
An object of the present invention is to provide a construction machine in which the function of the construction machine is organically and generally improved by effectively cooling the supercharger and reducing the size of the construction machine.

[0009]

Therefore, the construction machine of the present invention according to claim 1 has a frame provided with a working device on the front side of the construction machine and a left-right direction on the rear side of the construction machine of the frame. And an engine mounted horizontally that extends to
A counterweight attached to a rear end portion of the frame to balance with the working device, a cooling device provided on one side of the engine in the left-right direction, and the cooling device in the construction machine. The inflow side pipe and the outflow side pipe connected to the outer side in the rearward direction, the air cleaner arranged so as to be housed in the counterweight, the inflow side pipe, the outflow side pipe and the air cleaner pipe. It is characterized in that it is provided with a pipe accommodating portion provided on the counterweight for accommodating.

According to a second aspect of the present invention, in the construction machine of the first aspect, the pipe of the intake air cleaner of the engine and the inflow pipe and the outflow pipe are arranged in parallel in the vertical direction of the construction machine. It is characterized in that it is arranged as follows. A construction machine according to a third aspect of the present invention is the construction machine according to the first or second aspect, wherein the first and second pipe accommodating portions that are provided on the counterweights corresponding to the cooling devices and accommodate the respective pipes are provided. It is characterized in that at least one of the shielding members is attached.

A construction machine according to a fourth aspect of the present invention is the construction machine according to the first or second aspect, wherein the inflow side pipe and the outflow side pipe are aftercooler pipes. A construction machine according to a fifth aspect of the present invention is a construction machine according to the first aspect.
In the configuration according to any one of 3 above, a first cooling device provided on one side of the engine in the left-right direction of the construction machine and the first cooling device overlap in the left-right direction. The second cooling device provided in the second cooling device and the second cooling device through the outer side of the first cooling device in the rear direction of the construction machine.
It is characterized by including the inflow side pipe and the outflow side pipe connected to a cooling device.

A construction machine according to a sixth aspect of the present invention is the construction machine according to any one of the first to fifth aspects, in which any two heat exchangers among a plurality of heat exchangers are provided on the left and right. A first cooling device arranged in parallel, at least one of the two heat exchangers of the first cooling device, and at least one of the remaining heat exchangers of the plurality of heat exchangers. And a cooling device arranged so as to overlap with each other, and is connected to the second cooling device through an outer portion of the first cooling device in the rear direction of the construction machine. In addition, the inflow side pipe and the outflow side pipe are provided.

According to a seventh aspect of the present invention, in the construction machine according to any one of the first to sixth aspects, the construction machine is disposed between the rear side of the construction machine of the cooling device and the counterweight. It is characterized in that at least a part of the inflow side pipe and the outflow side pipe to be installed is constituted by a flat pipe. The construction machine of the present invention according to claim 8 is claim 2
Or the shielding member for preventing the fluid from flowing back to the pipe accommodating portion, which is arranged between the inflow pipe, the outflow pipe and the air cleaner pipe and the pipe accommodating portion of the counterweight. It is characterized by having.

According to a ninth aspect of the construction machine of the present invention, in the structure according to any one of the first to eighth aspects, the outer peripheral side wall of the cooling device faces the engine cover or the outer peripheral side wall. It is characterized in that a shielding member attached to at least one of the upper revolving structure side member is provided. A construction machine according to a tenth aspect of the present invention is the construction according to any one of the first to seventh aspects, in which the first shielding part member provided on the outer peripheral side of the cooling device and the pipe housing of the counterweight are housed. It is characterized in that it is formed separately from the second shielding member provided in the section.

A construction machine according to an eleventh aspect of the present invention is the construction machine according to any one of the first to seventh aspects, in which the engine and the cooling device including a plurality of cooling devices are mounted. , At least one of the plurality of cooling devices is arranged so as to be polymerized in series, and a pipe for a fluid to be cooled for supplying / discharging to / from any one of the cooling devices to be polymerized is provided. An arranging portion arranged so as to straddle the side wall of the other cooling device to be overlapped or an arranging portion arranged between the cooling device and the counterweight is provided, and the arranging portion passing through the arranging portion is provided. At least a part of the flat part in which at least a part of the pipe is formed in a flat shape, the inflow side pipe, the outflow side pipe, and the air cleaner pipe is arranged in the pipe accommodating portion. Iruko It is characterized in.

A construction machine according to a twelfth aspect of the present invention is the construction according to any one of the first to ninth aspects, wherein the inflow pipe and the outflow pipe are formed in a flat shape of the air cleaner pipe. It is characterized in that at least a part of the flat portion is arranged between the outer peripheral side wall of the cooling device and the counterweight.

A construction machine according to a thirteenth aspect of the present invention is the construction machine according to any one of the first, second, fifth and eleventh aspects, wherein the fluid pipe is penetrated and the two members are shielded from each other. In the member, there are 2 through holes through which the above-mentioned piping passes.
It is characterized by comprising a first shielding member which is divided and attached to one of the two members, and a second shielding member which is attached to the other divided member.

According to a fourteenth aspect of the present invention, in the construction machine of the thirteenth aspect, the construction machine is characterized in that a plurality of through holes of the pipe penetrating the shielding member are provided. A construction machine according to a fifteenth aspect of the present invention is the construction according to the thirteenth or fourteenth aspect, further including a pipe accommodating portion which is provided in at least one of the two members and accommodates the pipe, At least one of the first and second shielding members is attached to the inside of the pipe housing.

A construction machine according to a sixteenth aspect of the present invention is the construction machine according to any one of the thirteenth to fifteenth aspects.
The first portion having a notch attached to the one member and having a free end facing the other member, into which the pipe can be inserted.
A shield member; and a second shield member attached to the other member and having a notch into which the pipe can be inserted at a free end facing the one member, the first and second shield members passing through the shield member. The feature is that they are arranged so as to overlap each other in the direction.

A construction machine according to a seventeenth aspect of the present invention is the construction machine according to the fifth or sixth aspect, wherein the first cooling device comprises a plurality of heat exchangers having a heat radiating portion between the upper tank and the lower tank. It is composed of a composite heat exchanger that is connected so as to be superposed in series along the flow of the cooling air flowing to the heat radiating section and through which the same fluid to be cooled flows, and connects the upper tank of each heat exchanger of the composite heat exchanger. At least one of an inflow connection pipe and an outflow connection pipe connecting the lower tanks of the heat exchangers of the composite heat exchangers is provided.

In the construction machine of the present invention according to claim 18, in the structure according to claim 17, at least one connecting member of any one of the upper tank and the lower tank of the composite heat exchanger flows into the inflowing part. It is characterized in that it is configured to be used as at least one of the connection pipe and the outflow connection pipe. The construction machine of the present invention according to claim 19 is the construction machine according to claim 17 or 18.
In the configuration described above, the inflow connection pipe and the outflow connection pipe are such that the upper tank and the lower tank of each of the composite heat exchangers are provided at substantially central portions of the upper tank and the lower tank in the flow direction of the cooling air. It is characterized by being arranged.

A construction machine according to a twentieth aspect of the present invention is a frame provided with a working device on a front side of the construction machine,
A counterweight attached to the rear end of the frame for balancing with the working device, an engine mounted on the construction machine, and one of the two longitudinal ends of the crankshaft of the engine. A plurality of heat exchangers having a heat radiating portion between the upper tank and the lower tank is installed in the heat radiating portion. A composite heat exchanger connected so as to be superposed in series along the flow of the flowing cooling air, and configured so that the same cooled fluid flows, and an inflow connection pipe connecting each upper tank of the composite heat exchanger. At least one of the outflow connecting pipes connecting the lower tanks of the composite heat exchanger, the upper tank, and the lower tank. At least 1 on either side of
It is characterized by having individual connecting members.

A construction machine according to a twenty-first aspect of the present invention is the construction machine according to any one of the seventeenth to twentieth aspects.
The composite heat exchanger is characterized by being configured by an oil cooler.

[0024]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. 1 shows a case where the construction machine of the present invention is applied to a hydraulic excavator, and is a schematic side view showing a side surface of the hydraulic excavator, and FIG. 2 is a schematic explanatory view showing a cross section taken along the line 2A-2A of FIG. 3 is a schematic explanatory view showing a plan view of arrow 3A of FIG. 2, FIG. 4 is a schematic explanatory view showing a cross section taken along the line 4A-4A of FIG. 3, and FIG. 5 is a side view of arrow 5A of FIG. 6 is a schematic enlarged explanatory view of the main parts showing the piping state of the inflow side pipe and the outflow side pipe of FIG. 3, and FIG. 7 is the inflow side pipe, the outflow side pipe and the pipe housing part of FIG. FIG. 8 is a schematic explanatory view showing mutual positions, and FIG. 8 is a perspective view of an arrow 8A in FIG. 3. The inflow side pipe and the outflow side pipe attached to the radiator side surface of the first cooling device are partially constituted by flat tubes. FIG. 9 is a schematic explanatory view showing a state, FIG. 9 is a schematic explanatory view showing a disassembled state of the flat tube of FIG. 8, and FIG. It shows a shielding member applied to various parts of the construction machine of the embodiment, (A) is a schematic explanatory view showing a shielding member having a through hole penetrating a flow pipe attached between the two members, FIG. 1B is a schematic explanatory view showing a modified example of the shielding member of FIG.
1 is a schematic explanatory view showing another modified example of FIG. 10, FIG.
Is a schematic explanatory view showing a perspective view of the counterweight of the construction machine, FIG. 13 is a schematic explanatory view showing a side view of an arrow 13YA of FIG. 12, and FIG. 14 is a sectional view taken along the line 14YA-14YA of FIG. FIG. 15 is a schematic perspective view of the partial shielding member shown in FIG. 14, and FIG. 16 shows a composite heat exchanger of a modified example of the first cooling device of the embodiment of the present invention, which is for an oil cooler. 17 is a schematic explanatory view showing a plan view of the composite heat exchanger when the two heat exchangers are connected, and FIG. 17 is a schematic explanatory view showing a side view of an arrow 17A of FIG.

As shown in FIG. 1, a construction machine, for example, a hydraulic excavator P is composed of an upper revolving structure 2, a lower traveling structure 4, and a working device 6. Above upper revolving structure 2
A cab 8 for an operator room is provided at a front end portion of the above, a counterweight 10 is provided at a rear end portion thereof, and a hydraulic excavator is provided on a frame of the upper swing body 2 as shown in FIGS. A cooling device room CR and an engine room 13 are provided on the front side of the P counterweight 10.

As shown in FIGS. 1 to 3, the upper revolving structure 2 includes a revolving frame 5 which is a component, and a cabin 8 which is disposed on the front left side of the revolving frame 5 in the construction machine. The counterweight 10 attached to the rear side of the center frame 12 constitutes a main component, and the working device 6 for performing excavation work is disposed on the front side of the revolving structure 2. The swing frame 5 includes left and right center frames 12, which are arranged substantially parallel to the front-rear direction of the hydraulic excavator P, as shown in FIG.
12, side frames 14 and 14 disposed outside the center frames 12 and 12 in the left-right direction, and a plurality of beams 16 connecting the center frames 12 and the side frames 14 and the like. There is. The underside of the engine cover covers the lower side of the revolving frame 5.

Further, the rear ends of the center frames 12 and 12 project to the rear of the hydraulic excavator P as shown in FIG. 3 and FIG. 4 to form a mounting portion 12a of the counterweight 10 for supporting the counterweight 10. Has become. Further, as shown in FIGS. 2 and 3, the cover 1 for partitioning the machine room, the engine room 13 and the like provided on the swivel frame 5
Reference numeral 00 denotes side covers 24, 24 extending in the front-rear direction along the side frames 14, 14 and arranged upward.
And an upper cover 26 extending in a substantially horizontal direction so as to cover the upper end side of each side cover 24 and having an opening 27A formed in the center, and an opening 27A of the upper cover 26 so as to cover the opening 27A. An engine cover 28 provided on the upper cover 26 so as to be openable and closable constitutes a main component. The side cover 24 and the upper cover 26 are provided with air circulation ports 24a and 26a, each of which is composed of a plurality of slits.

Further, as shown in FIGS. 2 and 3, a prime mover mounted laterally on the rear side of each center frame 12 and extending in the above-mentioned left-right direction, for example, a cooling fan 34 on the left side of the engine 32. A hydraulic pump 36, which is driven by the engine 32 and supplies hydraulic oil to the actuators provided on the lower traveling body 4, the working device 6 and the like, is mounted on the right side as shown in FIG. There is.

Further, the engine 32 is provided with a turbocharger 40, and the turbocharger 40 has a drive-side turbine chamber connected to an engine exhaust pipe EP on the muffler M side via an exhaust manifold and a pipe 39. ing. And
The cooling fan 34 is rotationally driven by the engine 32, and the inside of the cover 100 is provided with the intake ports 24a,
The outside air is sucked in through 6a and the like, and the outside air is used as cooling air for the aftercooler 44, the oil cooler 46, and the radiator 48.
To be supplied to.

Further, the radiator 48, which is the cooling device R provided in the cover 100, is positioned adjacent to the left side of the hydraulic excavator P of the cooling fan 34, as shown in FIG. Bolt BT on 16
It has been stopped. In the radiator 48, the upper tank 48a and the lower tank 48b are connected to the water jacket of the engine 32 via the pipe RT, whereby the heat radiating portion H of the engine cooling water that circulates between the engine 32 and the engine 32.
At T, heat is exchanged and discharged into the cooling air to cool the engine cooling water.

Further, as shown in FIGS. 2 and 3, the first cooling device R1 is constituted by the radiator 48 and the oil cooler 46 arranged in parallel in the front-rear direction of the construction machine P. This oil cooler 46
As shown in FIGS. 3 and 5, the upper tank 46a is connected to the return pipe 46U of each actuator of the lower traveling body 4, the working device 6 and the like, and the lower tank 46b controls the operation of the hydraulic excavator P by the pipe 46L. It is connected to a hydraulic oil tank via a valve CV. As a result, the oil cooler 46 radiates the heat of the hydraulic oil at the heat dissipation portion HT to cool the hydraulic oil.

Further, the radiator 48 and the oil cooler 46
In the construction machine P of the first cooling device R1 consisting of
The aftercooler 44 as the second cooling device R2 provided on the left side is provided with the inflow side tank 43T located below the rear side (counterweight 10 side) of the construction machine P and the upper side, as shown in FIG. Outflow side tank 45T
And a heat radiating portion HT which is provided between the tanks and includes a plurality of thin tubes and heat radiating fins. Further, an inflow pipe 43a extends to the engine 32 side through an inflow hose 43h and is connected to the turbocharger 40 in the inflow side tank 43T. Furthermore, in the outflow side tank 45T,
The outflow pipe 45a is connected to the intake manifold of the engine 32 via an outflow hose 45h.

The inflow-side pipe 43 and the outflow-side pipe 45 of the aftercooler 44 are provided with a pipe accommodating portion 60 capable of accommodating at least a part of the above-mentioned pipe in the counterweight 10. The inflow side and outflow side pipes 43, 45 are arranged in parallel in the vertical direction in the construction machine P, and the inflow side and outflow side pipes 43, 45 are arranged in parallel in the front-back direction of the conventional construction machine P. The diameter length of at least one pipe can be shortened as compared with the case where the pipes are arranged, and the diameter length of two pipes when the pipes 43 and 45 are housed can be eliminated. Therefore, the swing radius of the upper swing body 2 is shortened, and the construction machine P can be made compact.

Further, an air cleaner 41 for intake of the engine 32 is arranged in the counterweight 10 of the construction machine P as shown in FIG. 3, and the inflow side and outflow side pipes 43,
The pipe 41A passing above 45 and connected to the turbocharger 40, the inflow side pipe 43, and the outflow side pipe 45
3 is arranged in the vertical direction of the construction machine P as shown in FIG.
5. Compared with the case where the air cleaner pipes 41A are arranged in parallel in the front-rear direction of the construction machine P, the length can be approximately 1/3, and the radius of gyration of the upper swing body 2 can be reduced.

Further, as shown in FIGS. 3 to 5, a pipe accommodating portion 60 for accommodating the above various pipes formed in the concave shape provided in the counterweight 10 and a small amount of the pipe accommodating portion 60. An air cleaner 41 for intake of the engine 32 is provided so that a part of the air cleaner 41 can be inserted therein, and the element 41E of the air cleaner 41 can be inserted into and removed from the pipe housing portion 60.

Further, the air cleaner 41 is provided with a pipe accommodating portion 60.
The air cleaner 41 is configured to be able to come in and out or be detachable so that the air cleaner 41 does not block the cooling air passage (introduction passage) of the cooling air of the cooling device R during normal use so that the flow resistance of the cooling air does not increase. Has been done. Further, in the present embodiment, as shown in FIGS. 3, 6 and 7, the counter weight 10 of the hydraulic excavator P is configured, and the air cleaner 41 is disposed in the pipe accommodating portion 60 provided in the counter weight 10. There is.

Next, the mounting structure of the above-mentioned air cleaner 41 in the pipe accommodating portion 60 provided in the counterweight 10 will be described.
As shown in FIG. 7, movable means H for moving the air cleaner 41 is provided, and this movable means H is pivotally supported by a shaft 74 in the pipe accommodating portion 60 of the counterweight 10 and inside the pipe accommodating portion 60. A moving plate 76 configured to be able to move in and out is provided, and the air cleaner 41 is attached to the moving plate 76 by an appropriate fixing means (not shown).

During normal use, the movable plate H is arranged so as to rotate the movable plate 76 about the shaft 74 so that at least a part of the air cleaner 41 enters the pipe accommodating portion 60. At the time of maintenance and inspection, the element 41E of the air cleaner 41 is configured so that the insertion / removal opening of the element 41E can be easily replaced, for example, by moving at least the above-mentioned element 41E to a position where it can be easily extracted.

The movable means H is not always necessary. If the element 41 can be inserted and removed while the air cleaner 41 is accommodated in the pipe accommodating portion 60, it is necessary to provide the movable means H. Disappear. Then, from the air cleaner 41 arranged as described above to the engine 3
If the pipe 41A of the air cleaner 41, which is an intake hose connected to the air conditioner 2, is arranged in the counterweight 10 so as not to become the flow resistance of the cooling air, the cooling efficiency can be further improved.

The aftercooler 44 is formed to be longer than the length of the oil cooler 46 and the radiator 48 in the front-rear direction of the hydraulic excavator P, and the inflow pipe 43a of the inflow side tank 43T and the outflow pipe 45a of the outflow side tank 45T. Is arranged outside of the oil cooler 46 and the radiator 48 in the rearward direction, so that the inflow pipe 4
3a and the outflow pipe 45a may be connected to the inflow tank 43T and the outflow tank 45T on the surface of the aftercooler 44 on the cooling air flow side, and may be attached to the hydraulic shovel P in the left-right direction. With this configuration, in the inflow pipe 43a and the outflow pipe 45a, at least the portions projecting on the rear side of the aftercooler 44 are reduced, so that the turning radius of the upper revolving structure 2 can be reduced. Further, as shown in FIG. 5, the aftercooler 44 includes brackets 43b and 45 provided on the inflow side and outflow side tanks 43T and 45T.
A bolt BT is fastened to the radiator 48 and the oil cooler 46 via b.

The aftercooler 44 is the engine 32.
The air compressed by the turbocharger 40 is introduced into the inflow side tank 43T through the inflow hose 43h and circulates in the heat radiating portion HT to cool the compressed air, and the outflow hose from the outflow side tank 45T. It is supplied to the intake manifold of the engine 32 via 45h.

In the above-described embodiment shown in FIG. 2, the case in which the pipe accommodating portion 60 is provided has been described, but the pipe 43 is provided on the front side of the normal counterweight 10 in which the counterweight 10 is not provided with the pipe accommodating portion 60. , 45, and the air cleaner pipe 41A may be provided. That is, the inflow hose 43h that connects the turbocharger 40 of the engine 32 and the aftercooler 44 has one end connected to the driven turbine chamber of the turbocharger 40 and the other end connected to the inflow tank 43.
It is connected to the T inflow pipe 43a. The inflow hose 43h is arranged so as to pass through the radiator 48 and the oil cooler 46 on the rear outside of the hydraulic excavator P.
At least a part thereof is housed in a hose housing portion 60 which is a pipe housing portion 60 formed in the counterweight 10.

The outflow hose 45h, which is the outflow pipe 45 connecting the aftercooler 44 and the engine 32, has one end connected to the outflow pipe 45a of the outflow side tank 45T and the other end connected to the intake manifold of the engine 32. There is. The outflow hose 45h is located on the same side of the inflow hose 43h, and is arranged so as to pass through the rear outside of the hydraulic excavator P of the radiator 48.

The inflow hose 43h and the outflow hose 4
5h and the air cleaner pipe 41A are connected to the radiator 48.
Since the radiator 48 and the oil cooler 46 of the conventional device are configured to pass through the outer side in the front-rear direction,
Since the members such as the inflow hose 43h and the outflow hose 45h disposed on the upper side of the radiator are removed, the radiator 4
Since the height of the entire cooling device R including the oil cooler 46, the aftercooler 44, etc. can be lowered, and as shown in FIG. 2, the air cleaner 41 and the pipe 4 thereof.
1A is configured so as to pass through a space (a portion having a height difference) between the upper portion of the aftercooler 44 and the upper portion of the radiator 48, and the shapes of the radiator 48 and the oil cooler 46 on the upper side are shown in FIG. The engine cover 28 may have a simple shape like a substantially flat plate-shaped engine cover 28.

Further, as shown in FIG. 2, the radiator 4 is used.
8, the outer peripheral side wall of the cooling device R1 of at least one of the oil coolers 46, and the engine cover 2
8 or at least one of the constituent members of the upper revolving structure 2 facing the side wall on the outer peripheral side (the structural members such as the frame standing up from the floor member of the upper revolving structure and the counterweight 10). A shield member GS on one side is provided so that the cooling fluid that has passed through the cooling device R does not flow back to the upstream side. Further, as shown in FIG. 8, for example, it is arranged between a rear outer peripheral side wall which is one of the outer peripheral side walls of the cooling device R and a constituent member of the upper swing body 2, for example, the front surface of the counterweight 10. Upper shield member G
The S is attached by an attaching means FS such as an adhesive material, a double-sided adhesive member, or a bolt.

The upper shield member GS provided on the inner surface of the engine cover 28 is removed from the upper side of the radiator 48 as shown in FIG.
It is formed in a flat plate shape having a simple shape on the lower side of the engine cover 28. As a result, the engine cover 28
The upper shield member GS when the radiator 4 is opened or closed.
The cooling air can be effectively prevented from being recirculated to the upstream side by adhering along 8 and the durability against damage due to contact or the like can be improved.

The shielding member GS is shown in FIGS.
As described with reference to FIG. 15, the same effects can be obtained by applying the above-described embodiment shown in FIG. 3 as well. Further, in the case of the present embodiment, the counterweight 10 attached to the rear end portion of the hydraulic excavator P of the revolving frame 5 has a hollow weight cover 33 and a hose as shown in FIG. The hose accommodating box 31 forming the accommodating portion 60 and the weight adjusting material 49 filled in the weight cover 33. or,
A weight cover 33 which is an outer shell of the counterweight 10.
As shown in FIG. 4, the curved rear surface portion 33A, upper surface portion 33B, lower surface portion 33C, left side surface portion 33D, right side surface portion 3
Box body 31 formed on the box opened to the front by 3E
The cover plate 37 welded to the box body 31 forms a main structure so as to close the front side opening.

A pair of center frame fitting boxes 12c, 12c are welded over the lower surface 33C of the box body 31 and the cover plate 37 so as to be separated from each other on the right and left sides of the weight cover 33.
Defines a rectangular parallelepiped space that opens toward the front and the bottom of the hydraulic excavator P. The weight mounting portion 12 of the center frame 12 is placed in the rectangular parallelepiped space formed by the center frame fitting boxes 12c, 12c.
a is fitted and is bolted BT integrally.

Further, the hose housing box 31a provided from the intermediate height position of the lid plate 37 to the upper side is composed of a rear surface 28A, a lower surface 28C, a left side surface 28D, a right side surface 28E and an upper side surface 28B. Each of the openings 37a is welded to form a hose storage box 31a. As a result, the hose housing box 31a constitutes a hose housing part 60 as a horizontally long pipe housing part which is opened toward the front side between the hose housing box 31a and the box body 31 and extends in the left-right direction.

The hose accommodating portion 60 is connected to the engine 3
Inflow hose 43h, outflow hose 45h, and inflow pipe 43 connecting the turbocharger 40 of 2 and the aftercooler 44
a, the outflow pipe 45a, and at least a part of the air cleaner pipe 41A and the like, the inflow hose 43h can be moved to the rear side of the radiator 48 and the oil cooler 46 without moving the counterweight 10 rearward in the hydraulic excavator P. It is possible to install it outside the direction. The weight adjusting material 49 filled in the weight cover 33 is made of, for example, iron scrap, concrete, battery, etc.
It is appropriately set according to the model and the like.

The shielding member GS will be described. For example, as shown in FIG. 10, the two members are bolted to one member 102 and the other member 104 so as to come into contact with each other. A first shielding member GS1 and a second shielding member GS2 attached by BT are provided. The shielding member is arranged so that the through hole 110 of the distribution pipe is divided into two and sandwiches the pipe serving as the distribution pipe.

In the shielding member GS which penetrates the pipe which is the distribution pipe and shields between the two members, the through hole 110 which penetrates the distribution pipe is divided into two and the two members 10 are connected.
Since the first shielding member GS1 attached to either one of the members 2 and 104 and the second shielding member GS2 attached to the other member divided in two are provided, the above-mentioned two members 102, 104. After attaching one of the first and second shielding members GS1 and GS2 and the flow pipe to one of the members, the other shielding member GS attached to the other member can be easily attached. It is possible to improve the shielding performance.

A plurality of through holes 110 of the pipe (circulation pipe) penetrating the shielding member GS may be provided, and the shielding member GS can position the circulation pipe and can be assembled or disassembled. It becomes easier and the maintainability can be improved. Further, there is provided a pipe accommodating portion 60 which is provided in at least one of the two members 102 and 104 and accommodates a pipe which is a distribution pipe.
Since at least one of the first and second shielding members GS1 and GS2 can be attached to the position 0, the flow pipe can be positioned, assembly and disassembly are facilitated, and serviceability is improved. be able to.

Further, the other modified example shown in FIG.
Notch 1 that can be inserted into the free end 106 that is attached to the one member 102 and that faces the other member, and through which the flow pipe is inserted
And a second shield member GS2 having a notch 108a into which the flow pipe can be inserted at a free end 108 that is attached to the other member 104 and faces the one member. And above first
If the second shielding members GS1 and GS2 are arranged so as to overlap each other in the penetrating direction, the shielding performance can be further strengthened by the overlapping of the shielding members GS1 and GS2.

The case where the partial shielding member GSP shown in FIG. 12 is applied to the counterweight 10, as shown in FIG.
The counterweight 10 shown in FIG. 13 is attached to the pipe accommodating portion 60 formed in the concave shape by an attaching means FS such as an adhesive, a double-sided tape, or a bolt. 14 and 15
As shown in FIG. 5, the partial shielding member GSP has a trapezoidal outer shape and is attached to the corresponding portion by the attaching means FS.

Further, as shown in FIGS. 8 and 9, the flat portion is provided at another portion different from the above, and even if it is used in the pipe of the condenser 71 shown in FIG. Although it can be played, the piping of the aftercooler 44 will be described below. That is, the piping 4 of the aftercooler 44
3P and 45P, as shown in FIGS. 8 and 9, the above-mentioned pipes 43P and 45P of the aftercooler 44 are provided with elastic shielding members GS such as urethane rubber and glass wool as shown in FIGS. The pipe 43P, which passes through the arrangement portion PL provided on the side portion of the cooling device R that penetrates through and extends from the upstream side to the downstream side of the cooling device R,
A part of 45P is configured as a flat portion PL. As shown in FIGS. 8 and 9, the flat portion has a flat tube 55 (flat tube portion 5).
5a, 55b), and the thickness of the outer dimension of the flat pipe 55 is set to the circular inflow and outflow pipes 43a, 43a,
The diameter is smaller than the diameter D of 45a.

The flat tube 55 shown in FIGS. 8 and 9 is
A second shielding member, which is the shielding member GS, is disposed in the vicinity of the side surface of the radiator 48, and in the present embodiment, is disposed in the side portion of the radiator 48 or in the disposing portion PL provided in the pipe accommodating portion 60 of the counterweight 10. The radiator 4 is mounted by the mounting means FS composed of GS2, bolt BK1 and nut BK2.
It is attached to the side of 8.

The front side of the construction machine P of the first cooling device R1 is the front partition ERF of the engine room 13, the under cover 18, the engine cover 28, and the cooling device R.
The shielding member GS described above is disposed between and. Further, the first shielding member GS1 and the second shielding member GS2 may be integrally configured, and may be of a two-divided type, and one half of them may be provided in the hose accommodating portion 60 provided in the counterweight 10, for example. You may make it arrange | position by the attachment means FS as mentioned above.

Further, as shown in FIG. 9, a flat pipe joint 57 fitted to each of the flat pipe portions 55a and 55b at the ends of the divided pipes to connect the both flat pipe portions 55a and 55b is formed. It is provided. In addition, the above flat tube portions 55
The deformed joints 5a and 55b have one end fitted to the tubular ends of the divided cylindrical pipes 43P and 45P and the other end formed into the flat pipe shape.
It may be configured as 5A and 55B. Flat tube 55
The a and 55b may be composed of an inflow pipe 43a, an outflow pipe 45a or an inflow hose 43h, an outflow hose 45h.

Then, at least one of the rear side portion of the flat pipe 55 in the construction machine P of any of the plurality of cooling devices and the above-mentioned constituent member of the upper swing body of the hydraulic excavator, such as the counterweight 10, is selected. On the other hand,
As shown in FIGS. 8 and 9, it is detachably attached via detachable attachment means FS. Therefore, in the above embodiment, as shown in FIG. 9, the deformed joints 55A and 55B are formed.
The dead space can be reduced from the size h1 to the size h2 because the substantially circular pipes 43P and 45P are connected to each other via the. In the case of FIG. 2, since the pipes 43P and 45P are arranged only on one side of the radiator 18, the dead space is half the length of the case where they are arranged on both sides, that is, h2 / 2. Can be reduced. Further, the pipes 43P and 45P may also be configured by the flat pipes.

Since the hydraulic excavator P of this embodiment is constructed as described above, by driving the hydraulic pump 36 by the engine 32, the hydraulic pump 36 presses the actuators of the undercarriage 4 and the working device 6. Oil is supplied, the lower traveling body 4 is caused to travel, and the work device 6 is operated to excavate earth and sand. On the other hand, when the engine 32 is operating, the cooling fan 3 is driven by the engine 32.
4 is driven to rotate and slits 24a of the intake ports 24, 26,
External air is sucked into the cover 100 as cooling air from 26a, and this cooling air is supplied to the aftercooler 44, the oil cooler 46, and the radiator 48 to cool the intake air, the hydraulic oil, and the engine cooling water, and the upper cover 26, the undercooler. It is discharged from the discharge ports 18c and 26b of the cover 18.

The cooling air which has passed through the radiator 48 and has a high temperature has a part thereof on the upper and lower sides of the radiator 48.
Although it tries to wrap around to the upstream side through the left right side, the shielding member GS prevents the high temperature cooling air from wrapping around. At this time, since the upper shield member GS is in close contact with the upper side of the radiator 48, it is possible to effectively prevent the cooling air from flowing back and being recirculated.

As described above, according to this embodiment, the inflow hose 4 connecting the engine 32 and the aftercooler 44 is connected.
3h, the outflow hose 45h is disposed through the radiator 48 and the oil cooler 46 in the rearward direction outside the hydraulic excavator P, so that the inflow that is disposed above the radiator 48 and the oil cooler 46 of the conventional device is performed. And the outflow hose can be removed.

As a result, the height of the entire cooling device can be reduced, and the engine cover 28 of the cover 100 covering the cooling device can be lowered, so that the rear view from the cabin 8 can be improved. It is possible to improve workability. Further, since the shape of the upper shield member GS provided in the engine cover 28 corresponding to the radiator 48 can be made simple, the upper shield member GS can be closely attached along the radiator 48. The cooling air recirculation can be effectively and surely prevented, and the cooling efficiency by the radiator 48, the oil cooler 46, and the aftercooler 44 can be improved, and the upper shield member G
By making S a simple shape, the manufacturing cost can be reduced and the durability against damage and the like can be improved.

On the other hand, since the inflow hose 43h and the outflow hose 45h connecting the engine 32 and the aftercooler 44 are arranged through the radiator 48 and the oil cooler 46 on the outer side in the rearward direction, the inflow hose 43h and the outflow hose 4 are provided.
5h projects from the radiator 48 and the oil cooler 46 in the front-back direction. However, in the present embodiment, the pipes 41A of the inflow hose 43h, the outflow hose 45h, or the like protruding to the rear side or the pipe 41A of the air cleaner are provided in the hose accommodating portion 60 which is a pipe accommodating portion formed in the counterweight 10. Since it can be accommodated, a space for arranging the inflow hose 43h can be secured without moving the counterweight 10 rearward, and the inflow hose 43h, the outflow hose 45h or the air cleaner pipe 4 can be provided.
1A can be piped with a margin.

As a result, it is possible to prevent the turning radius from increasing due to the backward movement of the counterweight 10, and it is possible to improve the working performance of the hydraulic excavator P. Further, since other devices can be laid out with a margin, the assembling workability and the maintenance workability can be improved, and the manufacturing cost can be reduced. In the above embodiment, the aftercooler 44 as the second cooling device R2 has been described as an example, but the present invention is not limited to this, and may be, for example, the second cooler.
A condenser 71 or the like of the air conditioner may be applied as the exchanger R2.

Further, in this embodiment, the counterweight 1
Reference numeral 0 is composed of a weight cover 33 having a hollow closed structure, a weight adjusting material 49 filled in the weight cover 33, and the like.
Although the case where the hose accommodating portion 60 is formed by welding 1 has been described as an example, the present invention is not limited to this. For example, when the counterweight 10 is a one-piece formed by casting, The hose accommodating portion 60 may be provided at the stage.

Further, in the above embodiment, the inflow hose 4 is used.
Hose accommodating 60 with 3h formed on the counterweight 10
Although it is described that the engine 32 is housed inside, the same operation and effect as described above can be obtained even when the engine 32 is arranged so that the left and right directions are opposite to each other. Further, in the above-described embodiment, as shown in FIG. 2, the construction machine P of the engine 32 laterally arranged in front of the counterweight 10 is installed.
Of the radiator 48 and the oil cooler 46, which are provided in the left and right direction and are juxtaposed in the front-rear direction, and the separated oil cooler 46 is separated from the cab 8 and the radiator 4 described above.
8 and the cooling fan for the oil cooler so as to be superposed on the oil cooler 46, the construction machine P is compact as in the above embodiment.
Can be made.

Further, the oil cooler 46 of the first cooling device R1 according to the above-described embodiment of the present invention is not limited to the above, and for example, as shown in the modified examples shown in FIGS.
And connecting the second heat exchangers 461, 462 to the connecting pipe 46U.
It may be configured by a composite heat exchanger 460 connected by P and 46LP. That is, first, the above-mentioned modified example is shown in FIGS.
7, the composite heat exchanger according to the present invention has a plurality of cooling devices such as a radiator, an oil cooler, and
This is a composite heat exchanger when used in combination with an aftercooler.

This composite heat exchanger 460 is shown in FIGS.
As shown in FIG. 7, various combinations of the radiator 48, the oil cooler 46, the aftercooler 46, etc. mounted on the construction machine, or each of them alone is used as the cooling device. Then, for example, the composite heat exchanger 460 includes the first oil cooler 461 and the second oil cooler 4 of the two oil coolers 46, which are two heat exchangers.
It is composed of 62.

The upper tanks of the first and second oil coolers 461 and 462 of the composite heat exchanger 460,
The lower tanks 46UT and 46LT are welded to each other at approximately the center by an inflow connecting pipe and an outflow connecting pipe 46UP and 46LP.
A control valve CV is provided which is connected by connecting means such as brazing, riveting, and bolting, and which controls the hydraulic pressure for operating the construction machine P via a pipe.

That is, the composite heat exchanger 460 shown in FIG.
6, as shown in FIG. 17, a plurality of, in the present modification, two first and second heat exchangers 461 each having a heat radiating portion HT between the upper tank 46UT and the lower tank 46LT.
462 are arranged so as to be connected so as to be superposed in series along the flow of the cooling air flowing through the heat radiating portion HT. The upper tank 46 of each of the composite heat exchangers 460
The inflow connection pipe 46UP connecting the UT and the outflow connection pipe 46LP connecting the respective lower tanks 46LT of the composite heat exchanger 460 may be provided with at least one of the connection pipes. Figure 1
6, in the case shown in FIG. 17, the inflow connecting pipe 46UP,
Combined heat exchanger 46 in which the outflow connection pipe 46LP is arranged
It is 0.

Further, in addition to the inflow connecting pipe 46UP and the outflow connecting pipe LP provided in each of the upper tank 46UT and the lower tank 46LT, at least one connecting member JT is provided, and the first connecting member JT is provided. The rigid composite heat exchanger 460 may be configured so that the second heat exchangers 461 and 462 do not have a cantilever support structure.

Further, at least one is provided in each of the upper tank 46UT and the lower tank 46LT.
If the connecting member JT is configured to be used as either one of the inflow connecting pipe 46UP and the outflow connecting pipe 46LP, only the connecting pipe is required on the upper tank side, and the connecting member JT is saved to reduce the cost. can do.

The upper tanks 46UT and the lower tanks 46LT of the composite heat exchanger 460 are the same as the upper tanks 46UT and the lower tanks 46L.
The connecting member JT is disposed at a substantially central portion of T in the flow direction of the cooling air so as to also serve as the connecting member JT, and the cost is reduced so that the upper tank side does not serve as a cantilever support for the heat exchanger. I am trying.

In the modification, for example, the composite heat exchanger 460 is composed of the oil cooler 46, and the inflow connecting pipe 46UP and the outflow connecting pipe 46LP are provided in the substantially central portion CT of the composite heat exchanger 460. It is configured so that it can be short-circuited to a control valve CV that controls the hydraulic pressure for operating the construction machine P by means of a connected pipe. That is, the working oil supplied by an oil pump (not shown) is worked by various actuators as shown in FIGS. 16 and 17, and the working oil whose temperature has risen passes through the pipe P1 and the control valve CV. It is connected to the pipe 46U and the inflow connection pipe 46UP, is supplied to the upper tanks 46UT of the first and second heat exchangers 461 and 462, and is cooled by the cooling air in the heat radiating portion HT of the first and second heat exchangers 461 and 462. It is configured to flow to the lower tank LT and return to the hydraulic oil tank HTK via the control valve CV, the pipe SE, and the oil pump OP by the outflow pipe 46LP via the outflow connecting pipe 46LP, and the above process is repeated to perform the above work.

Therefore, since the above-described modified example is constructed as described above, the upper tank 4 of each of the first and second oil coolers 461 and 462 of the composite heat exchanger 460 described above is constructed.
6U, the lower tank, and the approximately central portion CT of 46LT are connected by the inflow connecting pipe 46UP and the outflow connecting pipe 46LP, or are connected together with the inflow connecting pipe 46UP, the outflow connecting pipe 46LP and the connecting member JT. The HT, the upper tank 46UT, and the lower tank 46LT do not have a cantilever support but have a strong support structure, and the durability is improved, and the cost of connecting the control valve CV as close as possible can be reduced.

[0078]

As described above in detail, according to the construction machine of the present invention as set forth in claim 1, a frame provided with a working device on the front side of the construction machine and a rear side of the construction machine of the frame. A horizontally mounted engine extending in the left-right direction, a counterweight attached to the rear end of the frame to balance with the working device, and provided on one side of the engine in the left-right direction. A cooling device, an inflow side pipe and an outflow side pipe connected to a rearward outer side portion of the construction machine of the cooling device, an air cleaner arranged to be housed in the counterweight, and The counterweight is provided with a pipe accommodating portion provided in the counterweight for accommodating the inflow side pipe, the outflow side pipe, and the intake pipe of the air cleaner. Without Hohe movement, it can be disposed with a margin of the pipe.

As a result, it is possible to prevent the turning radius from increasing due to the backward movement of the counterweight, and it is possible to improve the working performance of the hydraulic excavator. Moreover, since other devices can be laid out with a margin, the assembling workability and the maintenance workability can be improved, and the manufacturing cost can be reduced. According to the second aspect of the construction machine of the present invention, in the configuration of the first aspect, the pipe of the air cleaner for intake of the engine and the inflow pipe and the outflow pipe are arranged in parallel in the vertical direction of the construction machine. In addition to the effect of the first aspect, it is possible to prevent the turning radius from increasing due to the backward movement of the counterweight, and it is possible to improve the work performance of the hydraulic excavator. Moreover, since other devices can be laid out with a margin, the assembling workability and the maintenance workability can be improved, and the manufacturing cost can be reduced. The length of the radius of gyration of the upper swing body of the construction machine is reduced, which facilitates work in a narrow construction site.

According to the third aspect of the construction machine of the present invention, in the structure of the first or second aspect, the counterweight corresponding to the cooling device is provided in the pipe accommodating portion for accommodating each of the pipes. 2. Since at least one of the first and second shielding members is attached,
Alternatively, in addition to the effect of 2, it is possible to improve the positioning of the pipe, the piping work, and the shielding performance. Further, this pipe can be arranged with a margin without moving the counterweight to the rear.

According to the fourth aspect of the construction machine of the present invention, in the configuration of the first or third aspect, the inflow side pipe and the outflow side pipe are aftercooler pipes.
In addition to the effect of claim 1 or 3, the cooling efficiency of the aftercooler can be improved. According to the construction machine of the present invention, in the structure according to any one of claims 1 to 3, the present invention according to claim 5 is provided at one side of the engine in the left-right direction of the construction machine. A first cooling device,
The second cooling device is provided in the first cooling device so as to be overlapped in the left-right direction, and the second cooling device is passed through either of the rearward outer sides of the construction machine of the first cooling device. Since the inflow side pipe and the outflow side pipe connected to each other are provided, in addition to the effect according to any one of claims 1 to 3, a first cooling device such as the radiator or oil cooler,
By circulating the cooling air through the second cooling device such as an aftercooler, these cooling devices can be cooled.

According to the construction machine of the present invention, in the structure described in any one of claims 1 to 5, the heat exchanger of any two of the plurality of heat exchangers is used. Cooling device having left and right heat exchangers arranged in parallel, at least one of the two heat exchangers of the first cooling device, and at least one of the remaining ones of the plurality of heat exchangers. A second cooling device composed of two heat exchangers, and a cooling device arranged so as to overlap with each other, and the second cooling device is passed through respective outer side portions of the first cooling device in the rear direction of the construction machine. Since the inflow side pipe and the outflow side pipe connected to the apparatus are provided, in addition to the effect according to any one of claims 1 to 5, the radiator, the oil cooler or the like first cooling device, the aftercooler, the condenser The cooling air should be circulated by the second cooling device such as a water cooler. Accordingly, it is possible to cool the cooling device.

Since the counterweight can be accommodated in the pipe accommodating portion provided in the counterweight, the pipe can be arranged with a margin without moving the counterweight backward. As a result, it is possible to prevent the turning radius from increasing due to the backward movement of the counterweight, and it is possible to improve the work performance of the hydraulic excavator. Further, since other devices can be laid out with a margin, the assembling workability and the maintenance workability can be improved, and the manufacturing cost can be reduced.

According to the construction machine of the present invention, in the construction described in any one of Claims 1 to 6, the present invention according to claim 7 provides the rear side of the construction machine of the cooling device and the counterweight. Since at least a part of the inflow side pipe and the outflow side pipe arranged between the two is constituted by a flat pipe, in addition to the effect of any one of claims 1 to 6, the turning radius increases due to the retraction of the counterweight. Can be prevented, and the work performance of this hydraulic excavator can be improved. Further, since the length of the construction machine in the front-rear direction can be shortened by the amount of the flat pipes as the inflow pipe and the outflow pipe, the manufacturing can be made compact, so that the cost can be reduced.

According to the construction machine of the invention described in claim 8, in the construction of claim 2 or 7, the inflow side pipe, the outflow side pipe, the air cleaner pipe and the counterweight pipe accommodating portion are provided. And a shielding member for preventing the fluid from flowing back to the pipe containing portion, the cooling device is cooled to a high temperature in addition to the effect of claim 2 or 7. Since the cooling air is prevented from flowing back to the upstream side by the shielding member of the pipe housing portion, effective cooling can be performed.

According to the construction machine of the present invention, in the construction according to any one of claims 1 to 8, the outer peripheral side wall of the cooling device and the engine cover or the outer peripheral side wall are described. Since the shielding member attached to at least one of the upper revolving structure side member facing the above is provided, in addition to the effect of any one of claims 1 to 8, the cooling device is cooled to a high temperature. Since the cooling air is prevented from flowing back to the upstream side by the shielding member of the pipe housing portion, effective cooling can be performed.

According to the tenth aspect of the construction machine of the present invention, in the configuration according to any one of the first to seventh aspects, the first shield member provided on the outer peripheral side of the cooling device and the counter are provided. The weight is formed separately from the second shielding member provided in the pipe housing portion.
In addition to any one of the effects 1 to 7, if necessary, the shielding member is separately formed to increase the cooling effect, and the shielding member is easily attached and detached to improve the adjustment of the sealing performance and the sealing condition. be able to.

According to the construction machine of the present invention, in the construction described in any one of claims 1 to 7, the invention described in claim 11 is equipped with the engine and a cooling device including a plurality of cooling devices. In the construction machine described above, at least any one of the plurality of cooling devices is arranged so as to be polymerized in series, and the fluid to be cooled is supplied to or discharged from any one of the cooling devices to be polymerized. A pipe for use is provided so as to straddle the side wall of the other cooling device to be overlapped, or a provision part provided between the cooling device and the counterweight is provided. At least a part of the flat portion in which at least a part of the pipe passing through is formed in a flat shape and the inflow side pipe, the outflow side pipe, and the air cleaner pipe are arranged in the pipe accommodating portion. Has been Since, in addition to the effects of any one of claims 1 to 7, can be reduced installation space of the cooling device by the flat portion diameter of the pipe is reduced in the cooling device,
The construction machine can be configured compactly.

According to the construction machine of the present invention, in the construction described in any one of claims 1 to 9, at least a part of the flat portion of the inflow pipe and the outflow pipe is provided. Since it is configured to be arranged between the outer peripheral side wall of the cooling device and the counterweight,
In addition to the effect of any one of claims 1 to 9, it is possible to prevent the turning radius from increasing due to the backward movement of the counterweight, and it is possible to improve the work performance of the hydraulic excavator. Also, because other devices can be laid out with a margin,
Assembling workability and maintenance workability can be improved, and manufacturing cost can be reduced.

According to the construction machine of the present invention as set forth in claim 13, in the structure as set forth in any one of claims 1, 2, 5, 11, the construction is provided on the counterweight corresponding to the cooling device. Since at least one of the first and second shielding members is installed in the pipe accommodating portion for accommodating each of the pipes, the first shielding member and the first shielding member and the second shielding member are provided. 2 The above 2 by the shielding member
It is possible to easily attach and disassemble members, pipes, and shielding members and maintain them, so that the shielding effect can be improved.

According to the construction machine of the present invention described in claim 14, in the structure described in claim 13, since there are a plurality of through holes of the pipe penetrating the shielding member, 13. The structure according to claim 13, wherein
In addition to the effect of 3, the distance between the pipes can be maintained,
Positioning is possible, shielding performance is improved, and the work of arranging the pipes can be made more efficient.

According to the construction machine of the fifteenth aspect of the present invention, in the construction of the thirteenth or fourteenth aspect, a pipe accommodating portion which is provided in at least one of the two members and accommodates the pipe. Since at least one of the first and second shielding members is attached to the inside of the pipe containing portion, the workability and the shielding effect are further improved in addition to the effect of claim 13 or 14. be able to.

According to a sixteenth aspect of the construction machine of the present invention, in the construction of the fifth or sixth aspect, a cut end which is attached to the one member and is capable of inserting the pipe at a free end facing the other member. The first shielding member having a notch,
The second member having a notch attached to the other member and having a free end facing the one member, into which the pipe can be inserted.
Since the first and second shielding members are arranged so that the penetrating directions of the first and second shielding members overlap with each other, in addition to the effect of claim 5 or 6, By overlapping the penetrating directions with each other, the positioning of the pipe can be further improved, and the shielding performance can be strongly improved.

According to the construction machine of the present invention as set forth in claim 17, in the construction as set forth in claim 5 or 6, the plurality of heat exchangers in which the first cooling device has a heat radiating portion between the upper tank and the lower tank. Is composed of a composite heat exchanger in which the same fluid to be cooled is connected so as to be superposed in series along the flow of the cooling air flowing to the heat radiating portion, and the upper tank of each heat exchanger of the composite heat exchanger is And the at least one of the outflow connecting pipes connecting the lower tanks of the composite heat exchanger, and therefore the plurality of the plurality of heat exchangers according to claim 5 or 6, are provided. The heat exchanger has a strong support structure that is connected by the inflow connection pipe and the outflow connection pipe, and the durability is improved.

Further, since the composite heat exchanger is composed of a plurality of heat exchangers, the size of the surface shape seen from the heat radiating portion is compared with the size of the surface shape of the single heat exchanger. It can be made small and can be made compact.
Therefore, the degree of freedom in design can be expanded when the composite heat exchanger is arranged. According to the construction machine of the present invention described in claim 18, in the structure described in claim 17, at least one connecting member of any one of the upper tank and the lower tank of the composite heat exchanger is the inflow connecting pipe. , In addition to the effect of claim 17, the inflow connection pipe and the outflow connection pipe are also used as the connection member, and the connection member is connected. The members can be saved and the cost can be reduced.

According to the construction machine of the present invention as set forth in claim 19, in the construction as set forth in claim 17 or 18, the inflow connecting pipe and the outflow connecting pipe contain the cooling air for the upper tank and the lower tank, respectively. Since it is arranged at a position substantially in the center with respect to the flow direction, in addition to the effect of claim 17 or 18, the upper tank and the lower tank of each of the plurality of heat exchangers of the composite heat exchanger can be omitted. The central portion is connected by an inflow connecting pipe and an outflow connecting pipe, and substantially the central portions of the upper tank and the lower tank are supported by both of the connecting pipes, and the upper tank and the lower tank are cantilevered. Instead, a strong support structure is provided, durability can be improved, and cost can be reduced.

According to the twentieth aspect of the construction machine of the present invention, a frame provided with a working device on the front side of the construction machine and a counter attached to the rear end of the frame for balancing the working device. A weight, an engine mounted on the construction machine, a plurality of cooling devices provided on either side of both ends in the longitudinal direction of the crankshaft of the engine, and the plurality of cooling devices One of the cooling devices is connected to a plurality of heat exchangers having a heat radiating portion between the upper tank and the lower tank so as to be superposed in series along the flow of the cooling air flowing to the heat radiating portion, and the same cooled object. A composite heat exchanger configured to allow a fluid to flow therethrough, an inflow connection pipe connecting each upper tank of the composite heat exchanger, and a lower portion of each of the composite heat exchangers. Since at least one of the outflow connecting pipes for connecting the tanks and at least one connecting member for at least one of the upper tank and the lower tank have the above-mentioned plurality of heat exchangers. A strong support structure is formed in which one of the inflow connecting pipe and the outflow connecting pipe is connected to improve durability. Further, by adopting the composite heat exchanger, the length of the construction machine in the front-rear direction can be shortened, and the radius of gyration of the upper-part turning body can be reduced without retracting the counterweight.

According to the construction machine of the present invention as set forth in claim 21, in the structure as set forth in claim 17 or 20, the composite heat exchanger is composed of an oil cooler. In addition to the effect of Item 17 or 20, the working oil of the construction machine is effectively cooled, smooth work can be performed, and work efficiency can be improved.

[Brief description of drawings]

FIG. 1 is a schematic side view showing a side surface of a hydraulic excavator when a construction machine of the present invention is applied to the hydraulic excavator.

FIG. 2 is a schematic explanatory view showing a cross section taken along the line 2A-2A in FIG.

FIG. 3 is a schematic explanatory view showing a plan view of an arrow 3A in FIG.

FIG. 4 is a schematic explanatory view showing a cross section taken along line 4A-4A in FIG.

5 is a schematic explanatory view showing a side view of an arrow 5A in FIG. 3. FIG.

6 is a schematic enlarged explanatory view of a main part showing a piping state of an inflow side pipe and an outflow side pipe of FIG.

FIG. 7 is a schematic explanatory view showing the mutual positions of the inflow side pipe, the outflow side pipe and the pipe housing portion of FIG.

8 is a schematic explanatory view showing a state in which the inflow side pipe and the outflow side pipe attached to the radiator side surface of the first cooling device showing the perspective view of the arrow 8A in FIG. 3 are partially configured by flat tubes. .

9 is a schematic explanatory diagram showing a disassembled state of the flat tube of FIG. 8. FIG.

FIG. 10 shows a shielding member of the present invention, in which (A) is 2
FIG. 11 is a schematic explanatory view showing a shielding member having a through hole penetrating a flow pipe attached between members, and FIG. 10B is a schematic explanatory view showing a modified example of the shielding member of FIG.

FIG. 11 is a schematic explanatory view showing another modification of FIG.

FIG. 12 is a schematic explanatory view showing a perspective view of a counterweight of a construction machine.

13 is a schematic explanatory diagram showing a side view of an arrow 13YA in FIG.

FIG. 14 is a schematic explanatory view showing a cross-sectional view taken along the line 14YA-14YA in FIG.

FIG. 15 is a schematic perspective view of the partial shielding member shown in FIG.

FIG. 16 shows a composite heat exchanger of a modified example of the first cooling device of the embodiment of the present invention, and is a plan view of the composite heat exchanger when two heat exchangers for an oil cooler are connected to each other. It is a schematic explanatory drawing shown.

FIG. 17 is a schematic explanatory view showing a side view of an arrow 17A of FIG.

[Explanation of symbols]

2 Upper revolving structure 4 Undercarriage 5 swivel frames 6 Working device 8 cabins 10 counterweight 12 center frame 12a mounting part 14 Side frame 16 beams 24 side cover 26 Top cover 28 Engine cover 31 box 31a hose storage box 32 engine 33 weight cover 34 Cooling fan 36 hydraulic pump 37 Lid plate 37a opening 40 turbocharger 41 air cleaner 41A Air Cleaner Element 43 Inflow side piping 43a Inflow pipe 43h Inflow hose 43T Inflow side tank 44 Aftercooler 45 Outflow side piping 45a outflow pipe 45h outflow hose 45T Outflow side tank 46 oil cooler 46a Oil cooler upper tank 46b Oil cooler lower tank 48 radiator 48a radiator upper tank 48b radiator lower tank 49 Weight adjuster 55 Flat tube 60 Piping housing (hose housing) 71 condenser 100 cover 102 one member 104 The other member 106 Free end 106a cutout 108a Notch 108 Free end 110 through holes CR cooling device room FS mounting means GS shielding member GS1 first shielding member GS2 second shielding member HT heat sink P construction machinery R cooling device R1 first cooling device R2 Second cooling device

Claims (21)

[Claims] 1. A frame provided with a working device on the front side of a construction machine, an engine mounted horizontally on the rear side of the construction machine on the rear side of the construction machine, and a work device for balancing the work device. Connected to a counterweight attached to the rear end of the frame, a cooling device provided on one side of the engine in the left-right direction, and an outer portion of the cooling device in the rearward direction of the construction machine. The inflow side pipe and the outflow side pipe, the air cleaner arranged so as to be housed in the counterweight, and the counterweight for accommodating the inflow side pipe, the outflow side pipe and the air cleaner pipe. A construction machine, comprising: a pipe housing provided. 2. The pipe of the air cleaner for intake of the engine and the inflow pipe and the outflow pipe are arranged in parallel in the vertical direction of the construction machine. Construction machinery. 3. At least one of a first and a second shielding member is mounted in a pipe accommodating portion provided in the counterweight corresponding to the cooling device and accommodating each of the pipes. The construction machine according to claim 1 or 2. 4. The construction machine according to claim 1, wherein the inflow side pipe and the outflow side pipe are aftercooler pipes. 5. A first cooling device provided on one side of the engine in the left-right direction of the construction machine, and a second cooling device provided in the first cooling device so as to overlap in the left-right direction. A device, and the inflow side pipe and the outflow side pipe connected to the second cooling device through the outer side of the first cooling device in the rearward direction of the construction machine. The construction machine according to any one of 1 to 3. 6. A first cooling device in which any two heat exchangers of a plurality of heat exchangers are arranged in parallel on the left and right, and at least one of the two heat exchangers of the first cooling device. One of the plurality of heat exchangers, and a second cooling device composed of at least one of the remaining heat exchangers, the cooling device being disposed so as to overlap with each other; The inflow-side pipe and the outflow-side pipe connected to the second cooling device through the rear outer sides of the construction machine of the cooling device, respectively.
The construction machine according to claim 1. 7. The at least part of the inflow side pipe and the outflow side pipe arranged between the rear side of the construction machine of the cooling device and the counterweight is constituted by a flat pipe. , Any one of claims 1 to 6
The construction machine according to the item. 8. A shielding member is provided between the inflow pipe, the outflow pipe, the air cleaner pipe, and the pipe housing portion of the counterweight to prevent a fluid from flowing back to the pipe housing portion. The construction machine according to claim 2 or 7, characterized in that. 9. A shielding member attached to at least one of an outer peripheral side wall of the cooling device and the engine cover or the upper revolving structure side member facing the outer peripheral side wall. The construction machine according to any one of claims 1 to 8. 10. The first shield member provided on the outer peripheral side of the cooling device and the second shield member provided on the pipe accommodation portion of the counterweight are separately formed. The construction machine according to any one of claims 1 to 7. 11. A construction machine equipped with the engine and a cooling device including a plurality of cooling devices, wherein at least one of the plurality of cooling devices is arranged so as to be polymerized in series, and the polymerization is performed. An arrangement portion in which the pipe for the cooled fluid to be supplied to and discharged from one of the cooling devices is arranged so as to straddle the side wall of the other cooling device to be overlapped, or the cooling device and the counter. A flat portion in which an arrangement portion is provided between the weight and at least a part of the pipe passing through the arrangement portion is formed in a flat shape, the inflow side pipe, the outflow side pipe, and the air cleaner. Characterized in that at least a part of the pipe of the above is configured to be arranged in the pipe accommodating portion,
The construction machine according to any one of claims 1 to 7. 12. The inflow pipe, the outflow pipe, at least a part of the flat portion formed in a flat shape of the air cleaner pipe is arranged between an outer peripheral side wall of the cooling device and the counterweight. The construction machine according to any one of claims 1 to 9, which is configured as follows. 13. A shielding member for penetrating a pipe for fluid and shielding between two members, wherein a through hole penetrating the pipe has two parts and has one of the two parts. A first shield member attached to one member, and a second shield member having the other of the two divided parts and attached to the other member of the above members. The construction machine according to any one of claims 1, 2, 5, and 11. 14. The construction machine according to claim 13, wherein the pipe has a plurality of through holes penetrating the shielding member. 15. A pipe accommodating portion provided in at least one of the two members for accommodating the pipe, and at least one of the first and second shielding members in the pipe accommodating portion. 15. The construction machine according to claim 13 or 14, characterized in that either one is attached. 16. The first shield member, which is attached to the one member and has a notch into which the pipe can be inserted, at a free end facing the other member; and the one member attached to the other member, A second shielding member having a notch into which the pipe can be inserted at opposing free ends, wherein the first and second shielding members are arranged so as to overlap each other in the penetrating direction. The construction machine according to any one of claims 13 to 15. 17. The first cooling device is connected to a plurality of heat exchangers having a heat radiating portion between an upper tank and a lower tank so as to be superposed in series along a flow of cooling air flowing to the heat radiating portion. At least one of an inflow connecting pipe connecting each upper tank of the composite heat exchanger and an outflow connecting pipe connecting each lower tank of the composite heat exchanger. The construction machine according to claim 5 or 6, characterized by comprising either one of them. 18. The composite heat exchanger, wherein at least one connecting member of any one of the upper tank and the lower tank is also used as at least one of the inflow connecting pipe and the outflow connecting pipe. The construction machine according to claim 17, wherein the construction machine is configured as follows. 19. The inflow connecting pipe and the outflow connecting pipe are the upper tank and the lower tank of the composite heat exchanger, wherein the upper tank and the lower tank are substantially central portions of the upper tank and the lower tank in a flow direction of the cooling air. The construction machine according to claim 17, wherein the construction machine is arranged in 20. A frame in which a work device is provided on the front side of the construction machine, a counterweight attached to a rear end portion of the frame for balancing the work device, and an engine mounted on the construction machine. A plurality of cooling devices provided on either side of both ends in the longitudinal direction of the crankshaft of the engine,
Any one of the plurality of cooling devices may have a plurality of heat exchangers having a heat radiating portion between an upper tank and a lower tank, which are superposed in series along a flow of cooling air flowing through the heat radiating portion. Combined heat exchanger configured to allow the same cooled fluid to flow through, an inflow connection pipe connecting each upper tank of the composite heat exchanger, and an outflow connecting each lower tank of the composite heat exchanger. A construction machine comprising at least one of the connection pipes and at least one connection member in one of the upper tank and the lower tank. 21. The construction machine according to claim 17, wherein the composite heat exchanger comprises an oil cooler.