JP2887529B2 - Casing with heat dissipation function - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a casing having a heat radiating function used as a casing for covering a heat-generating portion such as a transmission section or an engine section of an automobile.

[0002]

2. Description of the Related Art Conventionally, a casing for covering a heat-generating portion such as a transmission portion and an engine portion of an automobile, for example, has a small heat transfer area by itself and does not sufficiently dissipate oil. It cannot be reduced. If the temperature of the oil in the casing is high, the lubrication performance of the oil decreases, the amount of supplied oil increases, and if the oil temperature rises excessively, the performance of the transmission unit or the engine unit deteriorates. Therefore, conventionally, the oil was cooled using a heat exchanger different from the casing of the transmission portion of the vehicle, and the engine portion of the vehicle was equipped with a large-capacity radiator to cool the oil. .

[0003]

However, according to such a conventional method, the use of a heat exchanger separate from the casing and the use of a large-capacity radiator increase the production cost of automobiles and the like. In addition, the conventional casing has a problem in that the casing, including the side cover and the oil pan, is entirely made of steel, so that the weight is large.

[0004] When the heat transfer area of a casing such as a transmission portion or an engine portion of an automobile is insufficient, for example, it is conceivable to enlarge a plate (panel) constituting the casing or attach fins to an outer surface of the casing. However, if the component plate of the casing is made large, the casing itself becomes large, and it is not compact, the weight becomes large, and the cost becomes high. In order to attach the fins to the outer surface of the casing, the fins are usually manufactured by a separate process, and the fins are attached by mechanical joining or metal joining (brazing). Of these, the former is based on the mechanical joining. For example, the contact resistance increases, resulting in a shortage of heat transfer performance, and the latter metal joining (brazing) complicates the manufacturing process, increases the cost, and heats the casing to form the casing. There is a problem that the material is softened and the product strength is reduced.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems of the prior art, and to provide a large heat dissipation area and an excellent heat dissipation function for the casing itself. Can be quickly discharged to the outside of the casing, so that the oil temperature in the casing is quickly lowered, the temperature rise of the transmission section or the engine section is suppressed, the performance is improved, and the oil is cooled. Requires no separate heat exchanger at all, or at least requires only a small capacity heat exchanger (including a radiator), is very light and compact, and is easy to manufacture. Another object of the present invention is to provide a casing having a heat radiation function that does not reduce the product strength.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a casing for covering a heat-generating portion such as a transmission portion or an engine portion of an automobile by pressing two aluminum plates together. It has a wall portion made of an aluminum roll bond material having a tubular hollow portion of the pattern, and the outer aluminum plate portion of the tubular hollow portion of the wall portion is cut and raised in the longitudinal direction of the hollow portion, so that it is formed on the outer surface of the casing. The gist of the present invention is a casing having a heat-dissipating function, on which heat-dissipating fins are formed.

[0007] In the above, the aluminum roll-bonding material is a material in which a pressure-resistant material is printed in a predetermined shape on one of two aluminum plates, the other plate is pressed on this surface, and then the fluid pressure is applied. Is introduced into a non-adhesive portion and expanded into a tubular shape, and is formed by a so-called roll bonding method.

[0008]

Since the casing having the heat radiation function is formed by cutting and raising the radiation fins on the wall made of the aluminum roll-bonded material, the heat radiation area of the casing is greatly increased and the wall and the wall are formed. Since the fins are made of the same member, the heat transfer characteristics are excellent, and the casing itself has an excellent heat dissipation function. Therefore, for example, heat generated in the transmission section or the engine section of the automobile can be quickly released to the outside of the casing via the casing wall and the radiation fins. As a result, the temperature of the oil in the casing can be quickly lowered, and a decrease in the lubrication performance of the oil can be prevented, so that the amount of supplied oil can be reduced. Further, since an excessive rise in the oil temperature can be prevented, a rise in the temperature of the transmission unit or the engine unit is suppressed, and the performance is improved. Also, for cooling the oil, there is no need to use a separate heat exchanger for the transmission part of the car from its casing, or at least to use a heat exchanger with a small capacity. Only the radiator with a small capacity needs to be equipped for the engine part. Further, for example, the side wall of the casing of the transmission section of the automobile and the casing wall such as the oil pan at the bottom of the casing of the engine section of the automobile are made of an aluminum roll bond material having radiating fins. It is compact.

[0009]

Next, an embodiment of the present invention will be described with reference to the drawings.

The embodiment shows a case where the casing of the present invention is applied to a casing of a transmission section of an automobile.

In FIGS. 1 and 2, the casing (1) of the transmission portion of the automobile is filled with oil for smooth operation of the transmission gear, and the casing (1) is rubbed by friction. Heat is generated. An opening of the casing (1) is covered with a side cover (lid) (2). The side cover (2) is formed by pressing two aluminum plates (11) and (12) and forming an aluminum roll bond material (1) having a tubular hollow portion (13) in a required pattern.
0), the outer aluminum plate portion (11a) of the tubular hollow portion (13) of the side cover (2) is cut in the longitudinal direction of the hollow portion (13) to form a slit (14). Radiating fins on the outer surface of the side cover (2)
(3) is formed.

The manufacturing process of the side cover (2) is shown in FIGS.

That is, first, the aluminum roll-bonding material (10) is printed on one of the two aluminum plates (11) and (12) with the anti-pressing material (14) in a predetermined shape. ,
After the other plate (12) is crimped to this surface (see FIG. 3A), fluid pressure is introduced into the non-crimped portion (14) between the two plates (11) and (12) to cause it to swell, A hollow portion (13) is formed (see FIG. 3B),
It is made by the so-called roll bonding method.

The outer aluminum plate portion (11a) of the tubular hollow portion (13) of the roll bond material (10) is so-called half-cut by a press blade (15) to form a longitudinal slit (16). (See FIGS. 3 and 4), the cut-and-raised mandrel (17) is inserted in such a way as to expand the tube, and the outer aluminum plate portion (11a) is cut and raised on both sides to form the side cover (2). Band-shaped heat radiation fins (3) are formed on the outer surface (see FIGS. 3 and 5).

FIGS. 6 and 7 show a second embodiment of the present invention. Here, the difference from the first embodiment is that the outer aluminum plate portion (11a) of the tubular hollow portion (13) of the aluminum roll bond material (10) constituting the side cover (2) is cut by a cutter. After cutting, not only the notch (16a) in the length direction of the outer aluminum plate portion (11a) but also the notch (16b) in the same width direction is formed (FIG. 6).
) And raised using a mandrel, so that a large number of strip-shaped radiating fins are formed on the outer surface of the side cover (2).
(3) is formed (see FIG. 7).

The other points of the second embodiment are the same as those of the first embodiment.

In each of the above embodiments, the side cover of the casing (1) of the transmission portion of the automobile is used.
(2) is made of an aluminum roll bond material (10) having radiating fins (3), but the present invention also provides an oil pan forming a bottom of a casing of an automobile engine. However, in some cases, the casing is made of an aluminum roll bond material (10) also having heat dissipating fins (3). It is applicable that the casing (1) is formed by pressing an aluminum roll bond material (1) by pressing two aluminum plates (11) and (12) and having a tubular hollow portion (13) in a required pattern.
It would be good if it had a 0) wall (2).

[0018]

According to the present invention, as described above, a casing for covering a heat-generating portion such as a transmission portion or an engine portion of an automobile is formed by pressing two aluminum plates together and having a tubular hollow portion having a required pattern. A wall portion made of a roll bond material is provided, and a radiation fin is formed on an outer surface of the casing by cutting and raising the outer aluminum plate portion of the tubular hollow portion of the wall in the length direction of the hollow portion. Therefore, the heat radiation area of the casing is greatly increased, and since the wall and the fin are made of the same member, the heat transfer characteristics are excellent, and the casing itself has an excellent heat radiation function. Heat generated in the transmission or engine of the automobile is transferred to the outside of the casing through the casing wall and the radiation fins. Can be released rapidly, thus rapidly lowering the oil temperature in the casing, and it is possible to prevent deterioration of the lubricating performance of the oil, it is possible to reduce the supply amount of oil.

Further, since an excessive rise in oil temperature can be prevented, a rise in the temperature of the transmission section or the engine section can be suppressed, the performance can be improved, and a separate heat exchanger can be used for cooling the oil. There is no need to do this, or at least use of low capacity heat exchangers (including radiators).

Further, since the casing is provided with a wall portion made of an aluminum-roll bond material, the casing is very lightweight as compared with a conventional steel casing, and fins are integrally formed on the roll bond material wall portion. Because it is formed, it is compact.

Further, it is not necessary to fabricate the fins by a separate processing as in the conventional case and use them by mechanical joining or metallic joining (brazing). There is an effect that the material is not softened by the heat and the product strength is not reduced.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a main part of a casing having a heat radiation function, showing a first embodiment of the present invention.

FIG. 2 is an enlarged sectional view of a side cover of the casing of FIG.

FIG. 3 is a partial enlarged cross-sectional view for explaining a manufacturing process of the side cover in order, in which two aluminum plates are pressure-bonded except a portion where a pressure-blocking prevention material is applied. FIG.
2B is a partially enlarged cross-sectional view of a roll bond material having a tubular hollow portion. FIG. 3C is a partially enlarged cross-sectional view of the roll bond material obtained by cutting the outer aluminum plate portion of the tubular hollow portion. FIG. 3D is a schematic perspective view showing a state where the outer aluminum plate portion of the cut tubular hollow portion of the roll bond material is raised.

FIG. 4 is a partial perspective view of a roll bond material in which an outer aluminum plate portion of a tubular hollow portion in FIG. 3C is cut.

FIG. 5 is an enlarged perspective view of a main part of the side cover of FIG. 1;

FIG. 6 is a partial perspective view of a roll bond material obtained by cutting an outer aluminum plate portion of a tubular hollow portion in a second embodiment of the present invention.

FIG. 7 is an enlarged perspective view of a main part of a side cover of a casing in the second embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Casing 2 Side cover (wall part made of roll bond material) 3 Radiation fin 10 Roll bond material 11 Aluminum plate 11a Outside aluminum plate part 12 Aluminum plate 13 Tubular hollow part

Claims (1)

(57) [Claims] A casing (1) for covering a heat-generating portion such as a transmission portion or an engine portion of an automobile,
A wall (2) made of an aluminum roll bond material (10) having two tubular aluminum plates (11) and (12) crimped thereon and having a tubular hollow portion (13) in a required pattern is provided. The outer aluminum plate part (11a) of the tubular hollow part (13) of (2) is
3) A casing having a heat dissipation function, wherein a heat dissipation fin (3) is formed on the outer surface of the casing by being cut and raised in the length direction.