JPH018871Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to an air-cooled laminated oil cooler that is mainly attached to motorcycles and the like, and which has excellent vibration resistance and aesthetics.

[Technical background of the invention and its problems]

As an example, there are conventional air-cooled laminated oil coolers mounted on motorcycles, as shown in FIGS. 6 to 10, manufactured by the present applicant. That is, it has a so-called drawn cup type elongated element 3, and a plurality of elements are stacked to form an oil cooler body. This element 3 is composed of a pair of thin metal plates, the peripheral edge of which is slightly raised, and oil inlet/outlet holes 1 are formed at both ends in the longitudinal direction. In the middle part, diagonal waves are formed to stir the oil. Then, a pair of thin metal plates are stacked in opposite directions so that the ridge lines of the corrugations intersect with each other (Fig. 10), and the oil is formed to flow in a zigzag pattern between the two metal plates 2. This is what I did. The thin metal plates constituting each element are all made of clad material whose both surfaces are coated with brazing filler metal in advance. A support plate 5 made of a flat plate having the same planar shape as each element is placed on each of the outermost elements 3, and a boss portion 6 for oil entry and exit and a bracket 7 for mounting a cooler are attached to the support plate 5. The parts between each element, the boss portion, and the bracket are brazed to each other, so that the structure is as shown in FIGS. 6 and 7.

However, when such an oil cooler is installed in a motorcycle that experiences particularly strong vibrations, cracks often occur in the outermost element. That is, when external force is repeatedly applied to the base of the boss portion 6 due to vibration, the support plate 5 itself becomes distorted.
A relatively large repeated load is applied to the thin metal plate 2 joined thereto. As a result, cracks occur in the thin metal plate 2 at point A near the boss portion 6 or point B near the bracket, causing oil leakage.

Furthermore, in the laminated oil cooler, the inner and outer surfaces of each element are coated with a brazing material in advance, which is melted in a furnace and joined together to complete the oil cooler. However, the brazing filler metal melted in the furnace often flows out onto the outer surface of the support plate 5, resulting in an unsightly appearance.

[Summary of the idea]

Therefore, the present invention aims to provide an oil cooler that eliminates the above-mentioned problems, and its gist is as follows.

That is, each element 3 consists of a pair of elongated thin metal plates whose both sides are coated with brazing material in advance, and the peripheral edges of the two are joined to each other by the brazing material, forming a flow path between them, and the ends thereof An oil inlet/outlet hole 1 is formed in the. A stacked oil cooler is constructed by stacking a plurality of such elements. Here, the present invention is particularly characterized by the following configuration.

First, the support plate 5 is formed to have substantially the same planar shape as the thin metal plate 2, and a slight hanging edge 4 is formed on its outer periphery. Then, this support plate 5 is laminated on the outermost element, and is positioned so that its hanging edge 4 faces the element side. A boss portion 6 for oil entry and exit is located at the end of the outer surface of the support plate 5. The thin metal plate whose both sides are coated with cladding material in advance, the support plate 5 whose outer surface is not coated with brazing material, and the boss portion 6 are fixed by brazing. It is characterized by

Therefore, according to the oil cooler, since the hanging edge 4 is formed on the outer peripheral edge of the support plate 5, its section modulus becomes large with respect to the bending moment applied to the boss portion 6. Therefore, excessive distortion does not occur in the thin metal plate 2 joined to the support plate 5, and the occurrence of cracks can be prevented and oil leakage can be eliminated. Further, the presence of the hanging edge 4 prevents the brazing material from flowing out onto the outer surface of the support plate 5 during brazing, thereby providing a good-looking oil cooler.

[Example of idea]

Next, embodiments of the present invention will be described based on the drawings.

1 to 3 show a first embodiment of the present invention,
FIG. 1 is a schematic elevation view thereof, FIG. 2 is a cross-sectional view of the support plate 5, and FIG. 3 is a side view of the first embodiment.

Particularly in this oil cooler, the supporting plate 5 has a hanging edge 4 formed around its entire periphery as shown in FIGS. 1 and 2. The depth of this hanging edge 4 is the same for each thin metal plate 2.
It is formed smaller than the height of. Note that the support plate 5 is generally thicker than the thin metal plate 2. The planar shape of the support plate 5 is approximately the same as the planar shape of each thin metal plate 2, and similar holes (not shown) are bored at positions that align with the oil inlet/outlet holes 1 of each metal plate 2. Note that this support plate 5 is not coated with a brazing material. Thin metal plates whose inner and outer surfaces are respectively coated with a brazing material are stacked as shown in FIGS. 1 and 3, and the support plate 5 is fitted onto the upper end thereof. Then, they are stacked so that the hanging edges 4 are positioned downward in the figure. Further, a brazing foil is interposed between the bracket 7 and the support plate 5 and between the hole edge of the boss portion 6 and the support plate 5, or a metal plate clad with a brazing material is interposed as appropriate. Hold with a jig. and,
In this state, it is placed in a vacuum furnace or an inert gas-filled furnace to melt the brazing material and complete the oil cooler. In this way, in the completed oil cooler, the hanging edge 4 of the support plate 5 is connected to the top element 3.
For example, even if there is a flow trace of molten wax on the outer surface of the thin metal plate 2, it is hardly visible from the outside. In addition, in this embodiment, since there is a slight distance between the hanging edge 4 and the flange of the thin metal plate 2, there is no risk of water or the like accumulating between the two, and cooling air is also kept between them. is distributed. In this embodiment, as is clear from FIG. 3, the support plate 5 located at the lower end is completely formed into a flat plate, but this support plate 5 is also constructed in the same manner as the support plate located at the upper end. Good too. Next,
4 and 5 show a second embodiment of the present invention,
In this embodiment, the depth of the support plate 5 is formed to be approximately equal to the height of the thin metal plate 2, and the outer surface of the metal plate 2 and the inner surface of the support plate 5 are joined, and the lower surface of the hanging edge 4 and the thin metal plate 2 are connected to each other. The flange portion of the metal plate 2 is integrally joined. Therefore, it is possible to obtain an oil cooler with superior rigidity. Note that in this embodiment, the hanging edge 4
Water drain holes 8 are bored at appropriate positions to prevent rainwater from accumulating inside the support plate 5.

[Effect of idea]

As is clear from the above description, the stacked oil cooler of the present invention has the following configuration.

That is, each element 3 consists of a pair of elongated thin metal plates whose both sides are coated with brazing material in advance, and the peripheral edges of the two are joined to each other by the brazing material to form a flow path between them, and the ends thereof An oil inlet/outlet hole 1 is formed in the. A stacked oil cooler is constructed by stacking a plurality of such elements. Here, the present invention is particularly characterized by the following configuration.

First, the support plate 5 is formed to have substantially the same planar shape as the thin metal plate 2, and a hanging edge 4 having a slight width is formed on its outer periphery. Then, this support plate 5 is laminated on the outermost element, and is positioned so that its hanging edge 4 faces the element side. A boss portion 6 for oil entry and exit is located at the end of the outer surface of the support plate 5. The thin metal plate whose both sides are coated with a cladding material in advance, the support plate 5 whose outer surface is not coated with a brazing material, and the boss portion 6 are fixed by brazing. It is characterized by

The oil cooler of the present invention has the above structure and has the following effects.

(1) The support plate 5 of this oil cooler has a hanging edge 4 of a slight width formed on its outer periphery.
Since the section modulus against the bending load is large, the support plate 5 is hardly deformed even if an external force is applied to the oil inlet/outlet boss portion 6.
Therefore, excessive strain is not applied to the thin metal plate 2 brazed to the inner surface of the support plate 5. Therefore, cracks are prevented from forming in the outermost element of the oil cooler,
This has the effect of providing an oil cooler with excellent vibration resistance.

(2) In addition, in the oil cooler, both sides of the thin metal plate 2 are coated with brazing material in advance, which is melted in a furnace and brazed to the support plate 5. Since at least the outer surface is not coated with the brazing material, the outermost outer surface of the oil cooler can be a good-looking outer surface without any traces of melting of the brazing material. At the same time, the traces of the melted brazing material on the surface of the thin metal plate 2 and the inner surface of the support plate 5 are covered by the hanging edge 4 formed on the outer periphery of the support plate 5, making them difficult to see.
Overall, this has the effect of providing a stacked oil cooler with an extremely good appearance. Furthermore, the molten brazing material is held by the hanging edge 4,
This prevents brazing filler metal from dripping and makes the oil cooler more attractive.

[Brief explanation of the drawing]

1 to 3 show a first embodiment of the present invention,
Fig. 1 is a schematic elevation view of this embodiment, Fig. 2 is a cross-sectional view of the support plate 5 used in the same embodiment, Fig. 3 is a side view of the same embodiment, and Fig. 4 is an elevation view of the second embodiment of the present invention. 5 is a schematic side view of the same side, FIG. 6 is a schematic elevational view of a conventional oil cooler made by the applicant, FIG. 7 is a side view of the same, and FIG. 8 is a plan view of elements constituting the present oil cooler. FIG. 9 is a longitudinal sectional view of the same element, and FIG. 10 is a broken explanatory view showing a part of the same element. 1...Oil inlet/outlet hole, 2...Thin metal plate, 3
... Element, 4... Hanging edge, 5... Support plate, 6
...boss part, 7...bracket, 8...water drain hole.

Claims (1)

[Scope of utility model registration request] A pair of elongated thin metal plates 2, 2 having an oil inlet/outlet hole 1 at the end, both sides of which are coated with a brazing material in advance, and whose peripheral edges are joined to each other by the brazing material.
In a laminated oil cooler in which a plurality of elements 3 are stacked with a flow path formed between them to form an element 3, a hanging edge 4 with a slight width is formed on the outer periphery, and a brazing material is formed on at least the outer surface side. A support plate 5 which is not covered and whose planar shape is approximately the same as the metal plate 2 is laminated on the outermost element 3 with the hanging edge 4 facing the element 3, and the support plate 5 is A laminated oil cooler characterized in that a boss part 6 for oil inlet and outlet is located on the outer surface of the end part, and the space between each boss part 6 is fixed by brazing.