JPH10220232A - Cleaning package for construction machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily clean a cooler such as a radiator, an oil cooler, and the like without being interfered by an intercooler by installing the intercooler in an air pipe passage slidably. SOLUTION: When a cooler of a cleaning package 10 is cleaned, an upper cover 9a and/or a side door 9b of an engine chamber 9 is (are) opened. A bolt 38 for installing on the engine chamber 9 of a lower end part of an intercooler 16 is removed, the intercooler 16 is lifted up in a driving direction shown by an arrow 23, and is fixed by a proper means. An oil cooler 14 is inclined to a space formed by moving the intercooler 16. A space which is sufficiently for cleaning is ensured between a radiator 12, the oil cooler 14, and the intercooler 16 respectively. After cleaning work is completed by means such that high pressure air is sprayed to a cooling core by an air nozzle, the oil cooler 14 and the intercooler 16 are returned to an original position.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooling package for a construction machine, and more particularly to a mounting structure for an intercooler in a cooling package having a plurality of coolers.

[0002]

2. Description of the Related Art In construction machines such as hydraulic excavators and wheel loaders, engines equipped with an intercooler are increasing for the purpose of low fuel consumption, reduction of exhaust gas NOx concentration, improvement of output, and the like. As is well known, an intercooler is a cooler for supercharging air supplied to an engine, and is provided between a compressor outlet of a turbocharger and a suction pipe of an engine main body, and increases the temperature rise and density of the intake air due to turbocharging. Reduce the decrease. In a standard cooling package without an intercooler, a radiator of engine cooling water and an oil cooler of working machine hydraulic oil are arranged as a cooler so that cooling air generated by an engine fan passes sequentially. Have been. When the intercooler is mounted, the intercooler is arranged alongside the radiator and the oil cooler so that the cooling air passes in sequence.

[0003] Since this kind of construction machine is used under severe operating conditions with large load fluctuations, the engine and other equipment generate a large amount of heat. They are often used in high-temperature environments. For these reasons, a plurality of large-sized and large-capacity coolers are arranged to occupy a large space in the engine room. In addition, since construction machinery is used at construction sites, foreign matter such as dust, dust, dead leaves, etc. flows with the cooling wind,
They are caught and deposited on the fins of the cooling core of a cooler such as a radiator, an oil cooler, or an intercooler, and clog the cooler, thereby reducing the cooling capacity of the cooler. Therefore, it is essential to clean the cooler periodically or frequently in a dusty site. As a general cleaning method, a method of blowing high-pressure air to a cooling fin with an air nozzle to blow off and remove attached foreign matters is efficient and used. If the frequency of cleaning is high, one of the coolers is attached via hinge means so that the space between the coolers can be widened at the time of cleaning so that it is easy to clean. Some devices are tilted around the means.

[0004]

The conventional cooling package of a construction machine including the intercooler has the following problems to be solved. That is, if an intercooler is added to the arrangement of the radiator and the oil cooler and, for example, three are arranged in the order of the intercooler, the oil cooler, and the radiator, the cleaning of the oil cooler and the radiator is obstructed by the intercooler, and the air of the intercooler is also prevented. It is extremely difficult to tilt and move the intercooler because the pipe has a large diameter and lacks flexibility.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned circumstances, and has a technical problem that, even in a state where an intercooler is mounted, a cooler such as a radiator or an oil cooler can be easily cleaned without being obstructed by the intercooler. To provide a cooling package for construction machinery.

[0006]

According to the present invention, in order to solve the above-mentioned technical problems, an intercooler is mounted so as to be swingable with respect to an air line in which the intercooler is provided.

That is, according to the present invention, as a cooling package for a construction machine which solves the above technical problems,
A construction machine including a plurality of coolers arranged so that cooling air passes in sequence, the plurality of coolers including an intercooler provided in an air line between a turbocharger and an engine body; In the cooling package of (1), the intercooler is provided so as to be swingable in the air pipeline, and a cooling package for a construction machine is provided.

In a preferred embodiment, the intercooler includes an inlet tank, a cooling core, and an outlet tank, wherein each of the inlet tank and the outlet tank has a respective one of the inlet tank and the outlet tank. A swing joint mounted to be swingable and connected to the air line,
The swing center axes of the swing joints are disposed substantially on the same axis. The intercooler is disposed so as to be vertically swingable about the swing center axis.

In the cooling package for construction equipment according to the present invention, the intercooler is swingably provided in the air duct, so that when cleaning the radiator, the oil cooler, etc., the intercooler is swung to a position where it does not hinder the cleaning. Can be moved. Therefore, it is possible to easily clean the radiator, the oil cooler, and the like.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of a cooling package for a construction machine constructed in accordance with the present invention will be described below in more detail with reference to the accompanying drawings.

Referring to FIG. 1, a hydraulic excavator, which is a typical construction machine and to which the cooling package of the present invention is applied, which is generally designated by the reference numeral 2, comprises a lower traveling body 4,
An upper revolving unit 6 is mounted on the lower traveling unit 4 so as to be pivotable. A driver's cab 7, a work implement 8 in front of the driver's cab 7, and an engine room 9 behind the driver's cab 7 are arranged on the upper revolving unit 6. A cooling package 10 is provided in the engine room 9.

Referring to FIG. 2, a cooling package generally designated by reference numeral 10 will be described. The cooling package 10 includes a plurality of coolers, that is, a radiator 12, an oil cooler 14, and an intercooler 16.
The radiator 12, the oil cooler 14 and the intercooler 16 are provided with cooling cores (not shown) having cooling fins, which are known per se, with arrows 22 generated by a fan 20 driven and rotated by the engine body 18. The cooling air shown is arranged so as to sequentially pass through the cooling cores of the intercooler 16, the oil cooler 14, and the radiator 12. The intercooler 16 is provided in an air line 26 that sends the supercharged air sent from the turbocharger 24 to the engine body 18.
It has an air line 26a connecting the compressor outlet of the turbocharger 24 and the inlet of the intercooler 16, and an air line 26b connecting the outlet of the intercooler 16 and the suction pipe of the engine body 18. Cooling air indicated by an arrow 22 generated by the outside air being sucked in by the fan 20 sequentially passes through respective cooling cores of the intercooler 16, the oil cooler 14, and the radiator 12, and the supercharged air, the hydraulic oil, Then, the engine cooling water is cooled respectively.

Referring to FIG. 3, the intercooler 16 and the air line 26 will be further described. The intercooler 16 includes an inlet tank 28, a cooling core 30, and an outlet tank 32. The inlet tank 28 includes the inlet tank 2
8 is swingably attached to the upper end of the air line 26a.
A swing joint 34 connected to the outlet tank 32 is provided.
Is provided with a swing joint 36 which is swingably attached to the upper end of the outlet tank 32 and is connected to the air pipe 26b. The intercooler 16 is configured such that the supercharged air from the turbocharger 24 introduced into the swing joint 34 passes through the inlet tank 28, the cooling core 30, and the outlet tank 32,
It is configured to be cooled and sent out from the swing joint 36 to the engine body 18. Swing joint 34 and swing joint 3
6 are formed substantially identically, and each swing center axis 34a
And 36a are disposed substantially on the same axis (the swing joint 34 and the swing joint 36 will be described later in detail).

The attachment of the intercooler 16 to the engine compartment will be described with reference to FIG. 2 in conjunction with FIG. 3. The upper part of the intercooler 16 is formed by the swing center axes 34 a and 36 a of the swing joints 34 and 36 at the upper end of the intercooler 16. Are arranged horizontally (in the direction perpendicular to the paper surface in FIG. 2), and are arranged to be swingable in the vertical direction indicated by the arrow 23 around the swing center axes 34a and 36a. Air lines 26a and 26 to which swing joints 34 and 36 are connected, respectively.
b is held in the engine room 9 itself, but the swing joints 34 and 36 may be held directly in the engine room 9 if necessary. The lower part of the intercooler 16 is a bracket 2 provided at the lower end of the inlet tank 28.
8a and a bracket 32a provided at the lower end of the outlet tank 32 are fixed to the engine compartment 9 by mounting bolts 38, respectively.

The swing joint 34 and the swing joint 36 may be substantially the same, as can be clearly seen from FIG.
Therefore, one swing joint 34 will be described. The swing joint 34 has a shaft member 34b, which is inserted through a through-sliding hole 28c formed in the inlet tank 28 in a swingable manner. I have. An air flow path 34c is formed in the shaft member 34b in the direction of the swing axis 34a. One end of the air flow path 34c is connected to a joint 34d projecting from the shaft member 34b and connected to the air pipe 26a, and the other end. Are connected to openings 34e communicating with the inlet tank 28, respectively. An opening 34 is provided in a sliding portion between the shaft member 34b and the through sliding hole 28c.
A pair of annular seals 36, which can be made of synthetic rubber, are attached to the annular groove of the shaft member 34b on both sides with respect to e. The pair of annular seals 36 prevents air from leaking to the outside through a sliding portion between the shaft member 34b and the through sliding hole 28c. Snap rings 35 are respectively provided on the shaft members 34b protruding from the opening portions on both sides of the through-sliding holes 28c.
The movement of c in the axial direction is restricted. The air line 26a is fixed to the joint 34d by a clamp 26c. An air pipe 26b is fixed to a joint 36d similarly provided on the swing joint 36 of the outlet tank 32 by a clamp 26c.

The cleaning of the cooler of the cooling package 10 will be described with reference to FIGS. 2 and 3. (1) The upper cover 9a provided in the engine compartment 9 and / or
Alternatively, the side door 9b is opened, and the cleaning operation is performed from the opening. (2) The bolts 38 for attaching the lower end of the intercooler 16 to the engine compartment 9 are removed, and the intercooler 16 is lifted upward in the swing direction indicated by the arrow 23 as indicated by a two-dot chain line. Intercooler 1 by appropriate means if necessary
Fix 6 in the raised position. (3) As shown by the two-dot chain line,
The intercooler 16 moves and tilts into the empty space. Thus, the radiator 12, the oil cooler 14,
A sufficient space for cleaning is secured between each of the intercoolers 16. (4) After the high-pressure air is blown to the cooling core by the air nozzle or the cleaning operation is completed by other appropriate means, the oil cooler 14 and the intercooler 16 are returned to their original positions. The intercooler 16 is attached to the original position of the engine room 9 by the attachment bolt 38. (5) Thus, by swinging the intercooler 16 upward and lifting it up, even when the intercooler 16 is mounted, the oil cooler 14 and the radiator 12 are not obstructed by the intercooler 16, and the cooling core can be easily cleaned. I can do it. Further, since the intercooler 16 is swung upward to bring the intercooler 16 into a substantially horizontal state, foreign matters adhering and accumulating on the cooling core of the intercooler 16 are easily dropped by blowing high-pressure air from above or below. Can be removed.

As described above, the present invention has been described in detail based on the embodiments. However, the present invention is not limited to the above-described embodiments, and can be variously modified or modified within the scope of the present invention. It is. For example, (1) Instead of the swing joints 34 and 36 of the intercooler 16, as shown in FIG. 4, the swing center axes 34 a of the swing joints 34 and 36 are provided at the upper end portions of the inlet tank 28 and the outlet tank 32. The pipe joint 40 is provided so as to protrude and fixed on an axis 40a corresponding to 36a, and the air pipe 26a can be attached via a right-angle elbow 46 and a rubber hose 42. The rubber hose 42 is fixed to the right-angle elbow 46 and the pipe joint 40 by a clamp 43. According to this configuration, by loosening the clamp 43, the intercooler 16 can swing with respect to the air conduit 26 about the axis 40a. This configuration is effective when the cost is low and the frequency of cleaning is relatively low. (2) In the embodiment of the present invention, the arrangement position of the intercooler is located at the upstream end of the cooling air of the plurality of coolers, but is located at the downstream end of the cooling air, or of the plurality of coolers. It goes without saying that it may be in the middle. (3) In the embodiment of the present invention, the swing center axis of the intercooler is provided at the upper end of the intercooler, but may be the lower end of the intercooler. The position of the swing center axis in the engine room can be appropriately selected depending on the relationship with an adjacent structure or an air pipe, such as horizontally below the engine room or vertically to the side. (4) In the above embodiment, the swing joint is formed by swingably inserting a shaft member into a through-sliding hole provided in a tank of an intercooler. Fittings may be attached to the inlet and outlet tanks.

[0018]

According to the cooling package for a construction machine constructed in accordance with the present invention, there is provided a cooling package for a construction machine capable of easily cleaning a radiator, an oil cooler and other coolers even when an intercooler is mounted. You. Further, since the piping of the intercooler can be substantially the same as the conventional one, the increase in cost can be suppressed, and there is no need to enlarge the engine room due to the air pipe occupying a large space.

[Brief description of the drawings]

FIG. 1 is a side view of a hydraulic excavator including a cooling package of a construction machine configured according to the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a sectional view taken along line BB of FIG. 2;

FIG. 4 is a side view showing another embodiment of the swing joint.

[Explanation of symbols]

 2: hydraulic excavator 10: cooling package 12: radiator (cooler) 14: oil cooler (cooler) 16: intercooler (cooler) 18: engine body 24: turbocharger 26: air line 28: inlet tank 32: outlet Tank 34, 36: Swing joint 34a, 36a: Swing center axis

Claims (3)

[Claims] 1. A cooling device comprising: a plurality of coolers arranged so that cooling air passes through the coolers sequentially; and the plurality of coolers are provided in an air line between a turbocharger and an engine body. A cooling package for a construction machine including an intercooler, wherein the intercooler is swingably provided in the air duct. 2. The intercooler includes an inlet tank,
A cooling core and an outlet tank, wherein each of the inlet tank and the outlet tank is swingably attached to each of the inlet tank and the outlet tank and connected to the air line. The cooling package for a construction machine according to claim 1, wherein a dynamic coupling is provided, and a pivot center axis of each of the pivot joints is disposed substantially on the same axis. 3. The cooling package for a construction machine according to claim 2, wherein the intercooler is disposed so as to be vertically swingable about the swing center axis.