JP3212006B2 - Core part of housingless oil cooler - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a core portion of an oil cooler, and more particularly to a core portion of a housingless oil cooler formed by laminating plate members.

[0002]

2. Description of the Related Art Conventionally, as a housingless oil cooler formed by laminating plate members, those disclosed in Japanese Utility Model Laid-Open No. 1-88165, Japanese Utility Model Laid-Open No. 2-28971, and the like are known. ing.

FIG. 7 shows a housing-less type oil cooler of this type.
Is a method in which a first plate 13 and a second plate 15 made of aluminum are laminated, and these plates 13 and 15 are laminated.
The cooling water chambers 17 and the oil chambers 19 are alternately formed therebetween.

[0004] Adjacent oil chambers 19 are communicated by a pair of oil passages 23 formed symmetrically with respect to an oil return pipe 21 arranged at the center.
Further, an inner fin 25 is accommodated in the oil chamber 19, and an oil passage hole 27 is formed at a position corresponding to the oil passage 23 of the inner fin 25.

[0005] In this oil cooler, a part of the oil passage 23 is closed by predetermined closing plates 13A and 15A. This housingless oil cooler is used by being attached to an auto transmission case. After the oil from the auto transmission case flows into the core portion 11 as shown by the arrow in the figure, the oil is cooled by the closing plates 13A and 15A. After passing through the oil chamber 19 of the core part 11 while turning at the portion, heat exchange with the cooling water in the cooling water chamber 17 is performed, and then the oil is returned from the oil return pipe 21 to the auto transmission case.

In this housingless oil cooler, the oil is turned by the closing plates 13A and 15A to flow therethrough, so that the flow velocity of the oil becomes large and the flow becomes turbulent. Thus, the efficiency of heat exchange with the cooling water flowing through the cooling water chamber 17 can be improved.

[0007]

However, in such a conventional housingless oil cooler, the inner fin 25 accommodated in the oil chamber 19 is located at a position corresponding to the oil passage 23 as shown in FIG. Since the oil passage hole 27 is formed, the closing plate 13A, the closing plate 13A,
A repetitive force acts on the closing portions 13a and 15a of the 15A,
There has been a problem that cracks and the like may occur near the brazing portions of the closing portions 13a and 15a with the inner fin 25.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and provides a core portion of a housingless oil cooler capable of reliably preventing a crack or the like from occurring in a closing portion of a closing plate. With the goal.

[0009]

The core part of the housingless oil cooler of the present invention has a plurality of plates alternately laminated, and a cooling water chamber and an oil chamber are alternately formed between these plates. A plurality of oil passages connecting the adjacent oil chambers, forming an oil passage hole at a position corresponding to the oil passage of an inner fin accommodated in the oil chamber, and further defining a part of the oil passage at a predetermined position. In the core portion of the housingless oil cooler closed by the closing plate, an oil passage hole formed in an inner fin located adjacent to at least one side of the closing plate corresponds to the closed oil passage. The closed oil passage hole is closed , and the closed portion is brazed to the closing plate.

[0010]

In the core part of the housingless oil cooler of the present invention, the oil passage hole corresponding to the closed oil passage among the oil passage holes formed in the inner fin located adjacent to at least one side of the closing plate. The closed state
And brazed the obstruction to the obstruction plate ,
This ensures that the closing portion and intensity of the vicinity of the closing plate is increased.

[0011]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of the present invention; 1 and 2 show a housingless oil cooler provided with an embodiment of a core part of a housingless oil cooler of the present invention. In these figures, reference numeral 31 denotes a core part. I have.

Above and below the core 31, upper and lower casings 33 and 35 made of aluminum are arranged.
The upper casing 33 is covered with a cover member 37, and an oil outlet tank 39 is formed between the upper casing 33 and the cover member 37.

The oil outlet tank 39 includes a core 31
Is connected to an oil return pipe 41 disposed at the center of the oil return pipe. At the lower end of the lower casing 35 of the core portion 31, a mounting member 43 for attaching to an automatic transmission case is disposed. The lower casing 35 and the mounting member 43 are formed with oil inlets 35a, 43a.

As shown in FIG. 2, the upper casing 33 and the cover member 37 are provided with a cooling water inflow pipe 45 for flowing cooling water and a cooling water outflow pipe 4 for flowing cooling water.
7 is open.

In this embodiment, the core portion 31 is formed by alternately stacking first plates 51 and second plates 53 made of aluminum clad with a brazing material.
The cooling water chamber 5 is located between the plates 51 and 53.
5 and the oil chamber 57 are formed alternately.

As shown in FIG. 1, the adjacent oil chambers 57 are communicated by a pair of oil passages 59 formed symmetrically with respect to the oil return pipe 41 disposed at the center.

Further, an inner fin 61 is accommodated in the oil chamber 57, and an oil passage hole 63 is formed at a position corresponding to the oil passage 59 of the inner fin 61.

On the other hand, as shown in FIG. 2, adjacent cooling water chambers 55 communicate with each other by a pair of cooling water passages 65 formed at symmetric positions with respect to the oil return pipe 41 disposed at the center. I have.

In this oil cooler, a part of the oil passage 59 is closed by predetermined closing plates 51A and 53A. That is, as shown in FIG. 3, the core portion 31 is configured by arranging the inner fins 61 between the first plate 51 and the second plate 53 and laminating them. 51 and the second plate 5
In the predetermined closing plates 51A and 53A in 3, a part of the oil passage 59 is closed, and plate-side closing portions 51a and 53a are formed.

The oil passage holes 63 formed in the inner fins 61A located on both sides of the closing plates 51A, 53A correspond to the plate-side closing portions 51a, 53a, ie, the normal oil passage holes 63. The portion where is formed is closed to form an inner fin side closing portion 61a.

In this embodiment, the inner fins 61 are made of aluminum, and the inner fins 61A located on both sides of the closing plates 51A and 53A are brazed to the closing plates 51A and 53A.

In the above-mentioned housingless oil cooler, a non-corrosive flux is applied to each part in advance, dried and then assembled, and then heated in a furnace to braze each part. Manufactured at this time,
The inner fins 61A located on both sides of the closing plates 51A, 53A are brazed to the plate-side closing portions 51a, 53a together with the closing plates 51A, 53A.

In the above-described housingless oil cooler, the oil flows into the core portion 31 from the auto transmission case side through the oil inlets 43a and 35a below the core portion 31, as shown in FIG. After that, the flow is turned by the first closing plates 51A and 53A, and the oil chamber 57 is closed by the oil inlets 43a and 35a.
Flows to the opposite side, and then the next closing plate 51A, 5
3A, the flow is turned through the oil chamber 57 to the oil inlets 43a, 35a, and the upper casing 3
3, after the flow is turned by the oil inlet 43a,
The oil flows into the oil outlet tank 39 from the side opposite to the 35a side,
Thereafter, the oil is circulated through the oil return pipe 41 to the automatic transmission case side.

On the other hand, as shown in FIG. 5, the cooling water flows into the core portion 31 from the cooling water inflow pipe 45 above the core portion 31, and then flows through the cooling water passages 65 of the first plate 51 and the second plate 53. After the cooling water chambers 55 are filled, heat is exchanged with the oil in the oil chamber 57 and the cooling water outflow pipe 47 is filled.
Spill out of.

In the core portion of the above-mentioned housingless oil cooler, as shown in FIG. 6, the inner fins 61 located on both sides of the closing plates 51A and 53A are provided.
When A is brazed to the closing plates 51A and 53A, the plate-side closing portions 51a of the closing plates 51A and 53A,
The inner fin-side closing portions 61a of the inner fins 61A are brazed to both sides of the 53a, whereby the plate-side closing portions 51a, 53 of the closing plates 51A, 53A are brazed.
a and the strength in the vicinity thereof are increased, and the possibility that cracks or the like may occur in the plate-side closing portions 51a, 53a can be reliably eliminated.

In the above-described embodiment, an example in which the inner fins 61A are brazed to the closing plates 51A and 53A has been described. However, the present invention is not limited to such an embodiment, and one of the closing plates may be used. Only brazing may be used.

In the embodiment described above, the inner fins 6 disposed on both sides of the closing plates 51A and 53A are provided.
Although the example in which the inner fin-side closing portion 61a is formed only in 1A has been described, the present invention is not limited to such an embodiment, and the inner fin-side closing portion 61a may be formed in all the inner fins. good.

[0028]

As described above, in the core portion of the housingless oil cooler according to the present invention, the oil passage hole formed in the inner fin located adjacent to at least one side of the closing plate is closed. an oil passage hole corresponding to the oil passage in the closed state, since the brazed its occlusion in closing plate, by this, closed portion and intensity of the vicinity of the closure plate is increased, as a result,
There is an advantage that cracks and the like can be reliably prevented from being generated in the closing portion of the closing plate.

[Brief description of the drawings]

FIG. 1 is a sectional view taken along line II of FIG. 2 showing a housingless oil cooler having an embodiment of a core part of the housingless oil cooler of the present invention.

FIG. 2 is a sectional view taken along line II-II in FIG.

FIG. 3 is an exploded perspective view showing an arrangement state of a plate and an inner fin of a core part of FIG. 1;

FIG. 4 is a sectional view showing an oil flow of the housingless oil cooler of FIG. 1;

FIG. 5 is a sectional view showing a flow of cooling water of the housingless oil cooler of FIG. 1;

FIG. 6 is a sectional view showing details of a main part of the housingless oil cooler of FIG. 1;

FIG. 7 is a sectional view showing a core portion of a conventional housingless oil cooler.

FIG. 8 is a sectional view showing details of a main part of FIG. 7;

[Explanation of symbols]

 31 core portion 51 first plate 51A closing plate 51a plate side closing portion 53 second plate 53A closing plate 53a plate side closing portion 55 cooling water chamber 57 oil chamber 59 oil passage 61 inner fin 61a inner fin side closing portion 63 oil passage hole 65 Cooling water passage

Claims (1)

(57) [Claims] 1. A plurality of plates (51, 53) are alternately laminated, and a cooling water chamber (55) and an oil chamber (57) are alternately formed between these plates (51, 53). The adjacent oil chamber (57) communicates with a plurality of oil passages (59), and an oil passage is provided at a position corresponding to the oil passage (59) of the inner fin (61) housed in the oil chamber (57). A hole (63) is formed, and a part of the oil passage (59) is closed by a predetermined closing plate (51A, 53A). Oh corresponding to the occluded oil passage of the inner fin (oil passage holes formed in 61A) (63) (59) located adjacent to at least one side of 53A) Le passage hole closed shape (63)
And put the closing part (61a) in the closing plate (5).
1A, 53A). A core part of a housingless oil cooler characterized by being brazed to 1A, 53A).