JP3802340B2 - Oil cooler device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an oil cooler device, and more particularly to an oil cooler device that is installed in a wind guide passage for a radiator provided in a tractor or the like so as to cross the passage.
[0002]
[Prior art]
An oil cooler that is equipped with an oil cooler element that crosses this passage in the air guide passage for the radiator provided in the tractor, etc., and cools the oil by dissipating heat when the wind that flows through the air guide passage contacts The apparatus is known.
As the oil cooler element, a cooling pipe (steel pipe) bent in a meandering manner on a plane and a radiator-type heat radiation member formed on a honeycomb core are generally employed.
[0003]
[Problems to be solved by the invention]
In field crop tractors, there is a demand for higher engine power, and accordingly, the cooling capacity of the oil cooler must also be increased.
In the meandering cooler element described above, the configuration is simple but the cooling ability tends to be insufficient.
For this reason, if the number of meanders is increased, the area occupied by the cooler element in the engine room increases, which hinders the incorporation of an air cleaner, a battery and the like equipped with the cooler element.
[0004]
On the other hand, although the cooling capacity can be improved by the honeycomb-shaped cooler element, the structure is complicated and expensive, and the resistance of the wind flowing through the air guide passage to the radiator is large, and the cooler element is installed on the leeward side of the cooler element. The function of the radiator used may be deteriorated.
Accordingly, an object of the present invention is to provide an oil cooler device that has an improved meandering cooler element to improve the cooling performance without causing any trouble in assembling with other equipment and less impairing the function of the radiator. It is.
[0005]
[Means for Solving the Problems]
In order to achieve the above-mentioned object, the present invention is an oil cooler apparatus in which an oil cooler element 22 formed by bending a cooling pipe 21 in a meandering manner on a plane is provided in an air guide passage 18 for a radiator 12. The following technical measures are taken.
That is, the oil cooler device according to claim 1 is characterized in that a net-like heat sink 23 is stuck on the plane of the oil cooler element 22.
By adopting such a configuration, the air (outside air) flowing through the air guide passage 18 with respect to the radiator 12 contacts the oil cooler element 22 and receives a heat exchanging action by heat radiation, and also contacts the net-like heat sink 23. As a result, the oil is cooled by the heat exchange action.
[0006]
Here, since it is the net-like heat sink 23, the structure is simple and easy to make compared to a honeycomb core or the like, and the resistance to air flow is less increased, so that the leeward radiator There is little damage to the 12 functions.
Therefore, it is not necessary to increase the number of meanders of the cooling pipe 21, the cooler element 22 can be made compact, and the occupied area when incorporated in the engine room together with other equipment (such as an air cleaner) is not increased, and the engine 4 is made high. Ensuring sufficient cooling capacity even with horsepower.
[0007]
The cooling pipe 21 may be formed of a copper pipe and the heat sink 23 may be formed of a strip of copper or steel, but the cooling pipe 21 is a steel pipe and the heat sink 23 may be an extended metal or punching. It is recommended that it be metal (claim 2).
Moreover, it is recommended that the heat sink 23 is stuck on the windward side of the oil cooler element 22 or on both sides of the windward side and the leeward side (Claim 3).
Further, the heat radiating plate 23 can be attached to the entire surface of the oil cooler element 22, but a mounting plate 24 of the element 22 is fixed to a central portion in the left-right direction of the oil cooler element 22. It is recommended that the heat sink 23 having a symmetrical shape with the plate 24 as the axis of symmetry is affixed to the plane of the oil cooler element 22 as being symmetrical (Claim 4).
[0008]
According to this, it is possible to reduce the part management cost by making the heat radiating plate 23 symmetrical to the left and right, and it is possible to perform partial replacement, facilitating repair and maintenance.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 shows a two-shaft four-wheel tractor 1 as an example of a traveling work vehicle equipped with an oil cooler device according to the present invention. The tractor 1 has left and right front wheels 2 and left and right rear wheels 3. At least the front wheel 2 is a steering wheel.
Of course, it is also possible to adopt a four-wheel drive type in which both the front wheel 2 and the rear wheel 3 are driven. The tractor 1 is equipped with an engine 4 with high horsepower, and a cast clutch housing 6 is connected to the engine 4 via a sheet metal end plate 5 via bolt fastening means (not shown). A cast case 7 is also connected to the rear surface of the housing 6 via bolt fastening means, and forms an integral tractor vehicle body 8.
[0010]
The clutch housing 6 includes a main clutch, a main transmission using gears, and the like. The transmission case 7 includes a sub-transmission device, a differential device, and the like. A fuel tank is provided on the outer surface of the clutch housing 6. 9 is equipped.
The tractor 1 includes a steering operation device including a steering handle and a driver's seat, and this device is surrounded by a cabin 10 having a door 10A that can be freely opened and closed. But it ’s okay.
The engine 4 is surrounded by an openable / closable bonnet 11, and an engine room in the bonnet 11 is equipped with an oil cooler device 16 according to the present invention together with a radiator device 12, a condenser 13 for a cabin, an intercooler 14, and an air cleaner 15. ing.
[0011]
The radiator device 12 and the like are attached to a front axle frame 17 that extends forward from the engine 4. When the fan 12 </ b> A of the radiator device 12 is activated, outside air is discharged from the front grille portion 11 </ b> A of the bonnet 11. Therefore, as shown in FIG. 2, an air guide passage 18 is formed in the engine room in front of the radiator device 12, and in order to secure the air guide passage 18, the battery 19 is connected to the front axle. It is interiorly located in front of the frame 17. The intake of outside air into the radiator device 12 does not hinder the introduction from the front lower side by configuring the bottom plate 20 or the like with a punching metal plate or the like as shown in FIG. 2 as well as the grill portion 11A.
[0012]
The oil cooler device 16 according to the present invention is supported by the front axle frame 17 through the bottom plate 20 and the like as shown in FIG. 2 and is erected in front of the capacitor 13 in the figure, but the device 16 and the capacitor The arrangement of 13 may be reversed.
The details of the oil cooler device 16 according to the present invention will be described with reference to FIGS. 1 (1), (2), (3), and (4).
1 (1), (2), (3), and (4), an oil cooler device 16 includes an oil cooler element 22 formed by bending a cooling pipe 21 in a meandering manner on a plane, and an oil cooler element 22 attached on the plane of the element 22. It comprises a net-like heat sink 23 attached and a mounting plate 24 for mounting these on the air guide passage 18 for the radiator device (radiator) 12.
[0013]
The cooling pipe 21 is made of a metal material such as copper or steel pipe. In this embodiment, the cooling pipe 21 is made of STKM11A-ST having a thickness of 1.6 mm and a diameter of 12 mm. The joint 21A is joined oil-tightly by welding or the like.
The cooler element 22 has joint portions 22A and 22B for oil inlet / outlet at each end thereof, and the joint portions 22A and 22B have sleeve nuts 25A and 25B, and the joint portions 22A and 22B are joined to each other. Sleeve nuts 25 </ b> A and 25 </ b> B are oil-tightly joined, and the nuts 25 </ b> A and 25 </ b> B are positioned in front of the cooler element 22.
[0014]
The heat radiating plate 23 is composed of expanded metal, perforated plate (punching metal), etc., but in the illustrated form, it is made of expanded metal having a large number of rhomboid holes 23A having a height H of 4 mm and a width L of 8 mm in a grid arrangement. The material is EXP-1, the thickness is 0.5 mm, and it is attached to the surface of the pipe 21, that is, the windward side (front side) of the cooler element 22 by welding or the like.
The mounting plate 24 is formed in a strip shape with SS400 having a plate thickness of 3 mm and a plate width of 30 mm. By welding seven locations on the windward side of the cooler element 22 to the pipe, The mounting plate 24 has mounting holes 24A and 24B at both ends thereof (left and right in FIG. 1 (1) but upper and lower when mounted), respectively, and the mounting holes 24A and 24B are provided through the mounting holes 24A and 24B. 2, the upper and lower support members 26 are detachably attached with bolts or the like.
[0015]
Here, the cooler element 22 is mounted in front of the radiator 12 so as to cross the air guide passage 18 in a vertical plane.
Accordingly, when the fan 12 </ b> A of the radiator 12 is activated, the outside air (air) flowing through the air guide passage 18 is heat-exchanged by contacting the cooler element 22 and the heat radiating plate 23, so that the cooler element 22, that is, the cooling pipe 21. The oil that circulates is cooled.
The heat radiating plate 23 can be attached to the entire surface of the cooler element 22, but a symmetric heat radiating plate 23 having the mounting plate 24 as the axis of symmetry is attached.
[0016]
Moreover, although the heat sink 23 can be stuck on the leeward side of the cooler element 22, it is difficult to eliminate this when dust mixed in outside air adheres by sticking on the leeward side. For this reason, it is desirable to stick it on the windward side of the cooler element 22.
Further, in order to improve the cooling performance, the heat radiating plate 23 can be attached in a form of sandwiching so-called cooler elements 22 on both the windward side and the leeward side. When sticking to both surfaces, the form of the heat sink 23, in particular, the shape and number of the holes 23A may be different in the front and rear (both sides).
[0017]
【The invention's effect】
As described above in detail, according to the oil cooler device of the present invention, the cooling performance can be greatly improved with a compact design.
[Brief description of the drawings]
FIG. 1 shows an oil cooler device according to the present invention, wherein (1) is a front view, (2) is a plan view, (3) is a side view, and (4) is an enlarged view of a main part.
FIG. 2 is a side view of an engine room.
FIG. 3 is a side view of the tractor.
[Explanation of symbols]
12 Radiator 16 Oil cooler device 21 Cooling pipe 22 Oil cooler element 23 Heat sink 24 Mounting plate

Claims (4)

In the oil cooler device in which the oil cooler element (22) formed by bending the cooling pipe (21) in a meandering manner on a plane is provided in the air guide passage (18) for the radiator (12),
An oil cooler device, characterized in that a net-like heat sink (23) is stuck on the plane of the oil cooler element (22). The oil cooler device according to claim 1, wherein the cooling pipe (21) is a steel pipe and the heat radiating plate (23) is an extended metal or a punching metal. The oil cooler device according to claim 1 or 2, wherein a heat radiating plate (23) is attached to the windward side of the oil cooler element (22) or both sides of the windward side and the leeward side. A mounting plate (24) of this element (22) is fixed to the center portion in the left-right direction of the oil cooler element (22), and a heat radiating plate (23) having a symmetrical shape with the mounting plate (24) as the axis of symmetry. The oil cooler device according to any one of claims 1 to 3, wherein the oil cooler element is affixed symmetrically on the plane of the oil cooler element (22).

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