JP2000310119A - Cooling system of working machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate the cleaning work of a radiation core by arranging a cavity member for forming a path for cooling air between a pair of radiation cores for successively passing the cooling air, forming at least one opening part on the circumferential wall of the cavity member, and mounting an openable and closable cover member on the opening part. SOLUTION: A cooling system 2 arranged within the engine room of a working machine is formed of a pair of radiation cores arranged so as to successively pass cooling air, or an oil cooler 8 and a radiator 9, and a cavity member 10 for forming a cooling air passage is arranged between the radiation cores 8, 9. The cavity body 18 of the cooling member 10 is formed by mutually bonding plate members into a square tubular shape, and opening parts 20, 24 are formed on the upper and lower parts of the cavity body 18. Upper and lower covers 22, 26 are attachably and detachably mounted on the opening parts 20, 24, respectively. The oil cooler 8 is rockably supported on the lower part of the cavity member 10 through a pair of hinge brackets 8a, 8b provided on the lower end of the support frame of the oil cooler 8.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooling device for a working machine, and more particularly, to an arrangement structure of a radiator, an oil cooler, and the like, which are radiating cores of the cooling device for a working machine.

[0002]

2. Description of the Related Art A typical working machine, for example, a construction machine, an agricultural machine, etc., is provided with many devices and devices such as an engine, a working device and a traveling device, and a cooling water heated by these devices and devices. In order to cool hydraulic oil and the like, a radiator, an oil cooler, and the like, which are radiation cores, are provided. The heat radiation core is provided with a large number of heating fluid flow paths and heat radiation fins at a fine pitch, and cooling air generated by the cooling fan is passed between the heat radiation fins,
The heated fluid is cooled by heat exchange. These heat radiating cores are arranged close to each other so that the cooling air sequentially and effectively passes.

On the other hand, many foreign substances such as dust, dirt, earth and sand, and dead grass are present on construction sites, farms, and the like, which are operating sites of working machines. These foreign substances reach the radiator core along with the flow of the cooling air, and are caught and deposited on the radiator fins, causing clogging of the radiator core and reducing the cooling capacity of the cooling device. Therefore, cleaning work for removing these foreign substances from the heat radiation core such as a radiator and an oil cooler is frequently performed regularly in a dusty site.

In the cleaning operation, since the heat radiating cores are arranged side by side close to each other and the space therebetween is narrow, cleaning of the close portion of the heat radiating core and removal of dust accumulated between the heat radiating core and the heat radiating core are performed. Is difficult. Therefore, in a working machine that requires frequent cleaning work, a hinge means is attached to one end of the heat radiating core so that the space between the heat radiating core and the heat radiating core can be widened at the time of the cleaning work, Are tilted and moved about the hinge means so that the space between the heat radiating cores can be widened without removing the heat radiating core.

FIG. 4 shows a typical example, in which one of the pair of radiating cores 50a (for example, an oil cooler) and 50b (for example, a radiator) has a lower end connected to a hinge means 5.
1 and the other heat dissipation core 5 by bolt 52
0b. The hinge means 51 forms an oscillating axis 53 extending in the width direction of the heat radiating core 50a (the direction perpendicular to the plane of FIG. 4). When the heat radiation core 50a is detached from the heat radiation core 50b indicated by an arrow 54 (indicated by a two-dot chain line) by removing the bolt 52 and tilting the upper end of the heat radiation core 50a around the swing axis 53 (indicated by a two-dot chain line), the heat radiation core 50a A V-shaped space is formed between them. Using this space, for example, the hood 56 above the heat radiation cores 50a and 50b is opened to perform a cleaning operation.

[0006]

The conventional cooling device for a working machine of the above-described type has the following problems to be solved.

(1) Cleaning space: In the above-described embodiment having the hinge means 51, the swing center 53 of the hinge means 51
Since the gap X between the heat radiating core 50a and the heat radiating core 50b in this portion is small, it is not possible to sufficiently discharge dust passing through this portion, for example, below the work machine and to clean the portion.

(2) Heat radiation core pipes: Each of the heat radiation cores 50a and 50b is connected to at least two pipes (omitted in FIG. 4) of an inlet pipe and an outlet pipe of a fluid to be cooled. I have. This pipe has a relatively large diameter formed of a rubber hose, a steel pipe, or the like. Therefore, when tilting the heat radiation core for cleaning, the pipes must be bent together with the heat radiation core 50a and fall down. However, since these pipes do not bend freely, the heat radiation core 50a cannot be sufficiently tilted. Heat dissipation core 50a
Can be tilted without disturbing the piping, requiring complex and expensive swivel piping joints.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned circumstances, and a technical problem of the present invention is that it is possible to easily perform a cleaning operation of heat radiation cores of cooling devices arranged side by side so that cooling air passes sequentially. It is to provide a cooling device for a work machine.

[0010]

According to the present invention, as a cooling device for a working machine which solves the above technical problem, a cooling device for a cooling machine is provided between a pair of radiating cores arranged so that cooling air passes sequentially. Arranging a hollow member that forms an air passage, forming at least one or more openings on a peripheral wall of the hollow member,
A cooling device for a working machine, wherein a cover member that can be opened and closed is attached to the opening.

By providing a hollow member between the heat radiating cores, the cooling air can pass through the heat radiating cores appropriately and sequentially, and the space between the heat radiating cores is widened so that the opening portion of the hollow member is opened. To perform the cleaning work of the heat radiation core.

In a preferred embodiment, the opening is
When the hollow member is mounted on the work machine, the hollow member is provided above and below the hollow member.

The foreign matter deposited on the heat radiating core is opened by, for example, opening the hood of the engine room above the work machine located above the heat radiating core, and also opening the engine room below the working machine located below the heat radiating core. Open the bottom plate and clean,
Dust is discharged out of the work machine through the opening in the bottom plate.

[0014] In a preferred embodiment, at least one of the heat radiating cores is tiltably attached to the hollow member.

Further, since the heat radiation core can be tilted, the space for the cleaning operation can be increased even with a relatively small inclination without giving special consideration to the piping.

In a preferred embodiment, the pair of heat radiating cores are attached to the hollow member.

[0017] By forming the heat radiating core and the hollow member as an integral unit, the unit can be attached to and detached from the working machine, thereby facilitating the manufacture, assembly and maintenance of the working machine.

[0018]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a cooling device for a working machine constructed in accordance with the present invention;

Referring to FIG. 1 to FIG. 3, a cooling device, generally designated by the reference numeral 2, is disposed in an engine room 4 of a working machine, and is arranged in a pair such that cooling air 6 is sequentially passed therethrough. A hollow member 10 forming an air passage of the cooling air 6 is disposed between the heat radiation cores 8 and 9. Cooling air 6 is engine 1
2 generated by a cooling fan 14 driven by the cooling fan 2. In the present embodiment, the heat radiating core 8 is an oil cooler for cooling the working oil of the working machine, and the heat radiating core 9 is a radiator for cooling the cooling water of the engine 12.
As described later in detail, the oil cooler 8 and the radiator 9
Is mounted on the hollow member 10, and the hollow member 10 is mounted on the frame 4 a of the engine room 4. In FIG. 1, the upper side is above the work machine, and the reverse is below the work machine.

Since the oil cooler 8 and the radiator 9 are basically well known, they are simply illustrated. Each of the oil cooler 8 and the radiator 9 includes a core body having a large number of fluid channels and radiating fins at a fine pitch, a support frame for supporting the core body, an inlet for a fluid to be cooled into the core body, and a core body. And an outlet for fluid.

A pair of hinge brackets 8a, 8a are formed at the lower end of the support frame of the oil cooler 8 so as to form a swing axis 16 extending in the width direction of the oil cooler 8 by hinge pin holes 8b provided respectively. Have been. A pair of L-shaped brackets 8c, 8c are attached to the upper end of the support frame at intervals in the width direction of the oil cooler 8. A bolt insertion hole 8d is formed in the bracket 8c. The radiator 9 is formed with two screw holes 9a at four locations on the side of the cavity member 10 for attaching to the cavity member 10.

The hollow member 10 is formed so as to form a square cylindrical shape, and forms an air passage of the cooling air 6. Hollow member 10
A hollow body 18 integrally formed by joining plate members to each other, and an opening portion 20 formed at an upper portion of the hollow body 18.
An upper cover 22 is provided as a cover member attached to the lower body, and a lower cover 26 is provided as a cover member attached to an opening 24 formed in a lower portion of the hollow body 18.

The hollow body 18 is disposed on a side of the radiator 9 between a pair of rectangular side plates 18a, 18a forming a part of the rectangular cylindrical peripheral wall and one end (upper end) of the side plates 18a, 18a. A support plate 18b having an L-shaped cross section, a side plate 18a,
An L-shaped support plate 18c disposed on the radiator 9 side between the other ends (lower ends) of the 18a, and a rectangular support plate 1 disposed on the oil cooler 8 side between the lower ends of the side plates 18a, 18a.
8d, rectangular support plates 18e, 18e disposed on the radiator 9 side of each of the side plates 18a, 18a;
d, the hinge bracket 8 of the oil cooler 8
a, a pair of hinge brackets 18 combined with 8a
f, 18f. Each side plate 18a has one screw hole 18g at the top and two screw holes at the bottom, and each of the support plates 18b and 18c has two screw holes 18h. A hinge pin hole 18j is provided in the hinge brackets 18f, 18f, and the swing axis 16 is formed by the hinge pin hole 18j. Four bolt insertion holes 18k are formed in each of the mounting plates 18e, 18e. The upper opening 20 of the peripheral wall of the hollow body 18 is
The lower opening 24 is formed by the side plates 18a, 18a, the support plate 18c, and the support plate 18d, respectively.

The upper cover 22 and the lower cover 26 are substantially the same. The upper cover 22 has an L-shaped cross section,
On one surface thereof, two bolt insertion holes 22a are formed so as to be aligned with the screw holes 18h of the support plate 18b and the bolt insertion holes 8d of the bracket 8c of the orcooler 8, respectively. The other surface of the upper cover 22 is
It is formed in a size that closes. The upper cover 22 is fastened together by the mounting bolts 28 when mounting the orcooler 8 to the hollow member 10 (the mounting of the oil cooler 8 will be described in detail later). And the upper cover 22
Thereby, the opening portion 20 is closed. The lower cover 26 has an L-shaped cross section, and has a bolt insertion hole 26a formed on one surface thereof.
Each is formed so as to be aligned with the screw hole 18h of the support plate 18c. The other surface of the lower cover 26 is sized to close the opening 24. The opening 24 is closed by attaching the lower cover 26 to the support plate 18c with bolts 30.

The oil cooler 8 is attached to the hollow member 10 so as to be tiltable. That is, the hinge pin holes 8b of the pair of hinge brackets 8a, 8a at the lower end of the oil cooler 8 are connected to the hinge brackets 18f, 18f of the hollow member 10.
And the cotter pin 33 is attached to the end of the inserted pin 32 so as not to come out. Thus, the oil cooler 8 is attached to the hollow member 10 so as to be tiltable about the swing axis 16. The bolt insertion holes 8d of the pair of brackets 8c, 8c on the upper part of the oil cooler 8 are aligned with the bolt insertion holes 22a of the upper cover 22 and the screw holes 18h of the support plate 18b. The upper cover 22 is fastened and fixed together. The attachment bolt 28 is provided with a hand-operated slide handle on the head. The radiator 9 is mounted on the hollow member 10.
The screw holes 9a are aligned with the bolt insertion holes 18k of the mounting plates 18e, 18e of the hollow member 10, and are mounted by bolts.

The hollow member 10 integrated as described above,
The oil cooler 8 and the radiator 9 are attached to the frame 4a of the engine room 4 by a pair of brackets 36a and 36b on both lower sides of the hollow member 10 and by a pair of support bars 40a and 40b on both upper sides of the hollow member 10. Have been. Brackets 36a and 36b
Are attached by bolts 38 attached to the screw holes 18g of the hollow member 10, and the support bars 40a and 40b are attached by bolts 42 attached to the screw holes 18g of the hollow member 10 and the screw holes (not shown) of the frame 4a, respectively. ing.

The operation of the working machine cooling device 2 as described above will be described with reference to FIGS.

(1) Cleaning of the heat radiation core: When cleaning the oil cooler 8 and the radiator 9, the hood 4b at the upper part of the engine room 4 or the opening provided in the hood 4b is opened, and the oil cooler 8 and the upper cover are opened. 22 is the hollow member 1
The oil cooler 8 is tilted in a direction away from the hollow member 10 indicated by an arrow 17 about the swing axis 16 as shown by a two-dot chain line in FIG. In this state, an opening is formed in the upper part of the oil cooler 8 and the radiator 9 between the oil cooler 8 and the opening part 20 therebetween. Further, the bottom plate 4c of the engine room 4 or an opening provided in the bottom plate 4c is opened. Then, the lower cover 26 attached to the lower part of the hollow member 10 is removed by removing the bolt 30, and the opening portion 24 opening between the oil cooler 8 and the radiator 9 is opened. Thus, a wide cleaning space is formed between the oil cooler 8 and the radiator 9 and extends from the side of the hood 4b of the engine room 4 to the side of the bottom plate 4c. With this space, dust adhering and accumulating on the oil cooler 8 and the radiator 9 and dust accumulated between them are cleaned using a brush, tap water, compressed air, steam or other appropriate means, and the bottom plate 4c is removed. From the work machine. As described above, the space between the oil cooler 8 and the radiator 9 is not a narrow V-shaped space as in the related art, but is formed to extend widely from above to below, so that dust is sufficiently easily cleaned and discharged. be able to. After the cleaning is completed, the upper cover 22 and the lower cover 26 are attached to the opening 20 and the opening 24 of the hollow member 10 by returning the inclined oil cooler 8 to the original position in the reverse order.

(2) Piping of the radiation core: Since the opening 20 is formed by the hollow member 10 above the oil cooler 8 and the radiator 9, the oil cooler 8 does not need to be largely inclined. Therefore, there is no need for an expensive and complicated swivel joint for piping connected to the heat dissipation core, which was conventionally required to make a large inclination. In addition, piping is easy because the amount of tilt is small.

(3) Assembly of Unit: Since the oil cooler 8 and the radiator 9 are integrally mounted on the hollow member 10, the unit assembled in this state in advance can be attached to and detached from the frame 4a of the engine room 4. Therefore, manufacturing, assembly and maintenance of the working machine are facilitated.

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.

(1) Radiator core: In the embodiment of the present invention, a radiator and an oil cooler are shown as examples of the radiator core. However, the radiator core is not limited to the radiator and the oil cooler. The combination is not limited to a pair. For example, a heat radiation core such as an intercooler for supercharging air to the engine can be installed,
A plurality of various heat radiating cores may be arranged in pairs, and a hollow member may be appropriately disposed between each pair.

(2) Opening portion of the hollow member: In the embodiment of the present invention, the opening portion of the hollow member is provided at two locations, an upper portion and a lower portion. For example, one or two or more openings may be provided depending on the condition, the form of the engine compartment, the degree of dust accumulation on the heat dissipation core, the access to the heat dissipation core, and the like.
Also, it may be formed on the side surface of the hollow member.

(3) Opening Cover Member: In the embodiment of the present invention, the openable and closable cover member of the opening of the hollow member is detachably attached by bolts, but is one-touch by a spring hinge or the like. It may be attached so that it can be opened and closed.

(4) Tilt of Heat Dissipating Core: In the embodiment of the present invention, one oil cooler 8 of a pair of heat radiating cores attached to the hollow member 10 is tiltably attached. It may be fixed and attached so that it cannot tilt. Alternatively, both the oil cooler 8 and the radiator 9 may be attached to be tiltable.

(5) Cavity member and heat radiation core: In the embodiment of the present invention, the pair of heat radiation cores have substantially the same rectangular size in a front view (FIG. 2). When the members are used, their sizes do not need to be the same, and when the sizes are different, the shape may be adjusted by appropriately changing the shape of the connection portion of the hollow member.

[0037]

According to the cooling device for a working machine constructed in accordance with the present invention, the working machine for easily cleaning the heat radiation cores of the cooling devices arranged side by side so that the cooling air passes sequentially. Is provided.

[Brief description of the drawings]

FIG. 1 is a side view of a cooling device for a working machine configured according to the present invention.

FIG. 2 is a front view of the cooling device of the working machine as viewed in the direction of arrows AA in FIG. 1;

FIG. 3 is a perspective view showing a state before main components of the cooling device shown in FIGS. 1 and 2 are attached to each other.

FIG. 4 is an explanatory side view of a conventional cooling device.

[Explanation of symbols]

 2: Cooling device 4: Engine room 8: Oil cooler (radiation core) 9: Radiator (radiation core) 10: Cavity member 20: Opening portion 22: Upper cover (Cover member) 24: Opening portion 26: Lower cover (Cover member) )

Claims (4)

[Claims] 1. A hollow member forming an air passage of the cooling air is disposed between a pair of heat radiating cores arranged so that the cooling air passes sequentially, and at least one or more hollow members are formed on a peripheral wall of the hollow member. A cooling device for a working machine, wherein an opening is formed and a cover member that can be opened and closed is attached to the opening. 2. The cooling device for a work machine according to claim 1, wherein the opening is provided at an upper portion and a lower portion of the hollow member when the hollow member is mounted on the work machine. 3. The heat radiation core according to claim 1, wherein at least one of the heat radiation cores is tiltably attached to the hollow member.
A cooling device for the working machine according to the above. 4. The cooling device for a working machine according to claim 1, wherein said pair of heat radiating cores are attached to said hollow member.