JP2001272195A - Radiator incorporating oil cooler and method of manufacturing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a radiator incorporating an oil cooler contained in the tank of the radiator and a method of manufacturing the same, in which each component of the oil cooler is brazed surely under a state where the oil cooler is contained in the tank of the radiator. SOLUTION: A core section 19 is formed between long tanks 11, 13 disposed oppositely at an interval and a long oil cooler 25 is contained in the tanks 11, 13. In such a radiator incorporating an oil cooler, the tanks 11, 13, the core section 19 and the oil cooler 25 are formed of aluminum and the outer surface at the body section 27 of the oil cooler 25 touches the inner surface of the tank 13.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radiator with a built-in oil cooler in which an oil cooler is housed in a radiator tank, and a method for manufacturing the same.

[0002]

2. Description of the Related Art Conventionally, a radiator with a built-in oil cooler in which an oil cooler is accommodated in a radiator tank is known. On the other hand, recently, a radiator made of aluminum, in which a radiator tank and a core portion are formed of aluminum, has been developed. In such a radiator,
The aluminum oil cooler is housed in the aluminum tank.

[0003]

However, in such a radiator with a built-in oil cooler, the oil cooler is heat-treated together with the radiator in a state where the oil cooler is accommodated in a tank of the radiator, and each part of the oil cooler is brazed. There was a problem that it was difficult.

That is, since the oil cooler is accommodated in the tank, even when the radiator reaches the heat treatment temperature for brazing in the heat treatment furnace, the oil cooler does not rise to the heat treatment temperature for brazing. It was difficult to securely braze each part of the oil cooler.

The present invention has been made to solve such a conventional problem, and has a built-in oil cooler that can securely braze each component of the oil cooler in a state where the oil cooler is housed in a tank of a radiator. It is an object to provide a radiator and a method for manufacturing the radiator.

[0006]

According to a first aspect of the present invention, there is provided a radiator with a built-in oil cooler, wherein a core portion is formed between long tanks opposed to each other at a predetermined interval, and the long radiator is provided in the tank. In the oil cooler built-in radiator accommodating the oil cooler, the tank, the core portion and the oil cooler are formed of aluminum, and the outer surface of the main body of the oil cooler is in contact with the inner surface of the tank. And

A radiator with a built-in oil cooler according to a second aspect is the radiator with a built-in oil cooler according to the first aspect, wherein the main body of the oil cooler is in contact with an inner surface of the tank along a longitudinal direction thereof. And The radiator with a built-in oil cooler according to claim 3 is the radiator with a built-in oil cooler according to claim 1 or 2, wherein the main body of the oil cooler is in contact with an inner surface of the tank, and And an inner cylindrical member inserted therein, and an inner fin is disposed between the outer cylindrical member and the inner cylindrical member.

A radiator with a built-in oil cooler according to a fourth aspect is the radiator with a built-in oil cooler according to any one of the first to third aspects, wherein pipe members are mounted on both sides of the main body of the oil cooler. A seat portion is formed, and the seat portion is held in the tank by a holding member. In the method for manufacturing a radiator with a built-in oil cooler according to claim 5, a core portion is formed between long tanks that are arranged facing each other at a predetermined interval,
In the method for manufacturing a radiator with a built-in oil cooler in which a long oil cooler is housed in the tank, the tank, the core portion, and the oil cooler are formed of aluminum, and the outer surface of a main body of the oil cooler is When the tank is in contact with the inner surface of the tank,
The core and the oil cooler are assembled, and thereafter, the tank, the core and the oil cooler are integrally brazed.

(Operation) In the radiator with a built-in oil cooler according to the first aspect, the tank, the core portion and the oil cooler of the radiator are integrally brazed in the heat treatment furnace. During this heat treatment, the outer surface of the main body of the oil cooler is in contact with the inner surface of the tank, so that heat from the tank is transmitted to the main body of the oil cooler through the contact portion with the tank, and Is surely heated.

In the radiator with a built-in oil cooler according to the second aspect, the main body of the oil cooler is brought into contact with the inner surface of the tank along the longitudinal direction, thereby increasing the contact area with the tank. In the radiator with a built-in oil cooler according to the third aspect, the inner fin is disposed between the outer cylinder member and the inner cylinder member.

[0011] Then, the heat from the outer cylinder member that comes into contact with the inner surface of the tank is transmitted to the inner fin, and the inner fin is brazed. In the radiator with a built-in oil cooler according to the fourth aspect, the protrusions of the sheet portions formed on both sides of the main body of the oil cooler are held in the tank by the holding member. Then, by this holding, the main body of the oil cooler comes into contact with the inner surface of the tank.

According to a fifth aspect of the present invention, the tank, the core, and the oil cooler are assembled such that the outer surface of the main body of the oil cooler is in contact with the inner surface of the tank.

Thereafter, the tank, the core and the oil cooler are integrally brazed in the heat treatment furnace.

[0014]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows details of a main part of the present invention, and FIG. 2 shows a first embodiment of a radiator with a built-in oil cooler of the present invention. In the radiator with a built-in oil cooler shown in FIG. 2, a pair of long tanks 11 and 13 are provided.
Are arranged at predetermined intervals in the vertical direction. The pair of tanks 11 and 13 are made of aluminum and have a rectangular cross section.

A large number of aluminum tubes 15 and corrugated fins 17 are alternately arranged between the pair of tanks 11 and 13 to form a core 19. A coolant inlet pipe 21 is opened in the upper tank 11, and a coolant outlet pipe 23 is opened in the lower tank 13. A long oil cooler 25 is accommodated in the lower tank 13.

FIG. 3 shows the details of the oil cooler 25. The oil cooler 25 is formed by forming seat portions 29 on both sides of a main body 27. In the seat portion 29, a pipe member 31 for inflow or outflow of oil is arranged. The main body 27 has a cylindrical outer tube member 33 and a cylindrical inner tube member 35 inserted into the outer tube member 33.

The outer cylinder member 33 and the inner cylinder member 35 are formed of aluminum. And the outer cylinder member 33
An inner fin 37 made of aluminum is arranged between the inner fin member 35 and the inner cylinder member 35.

The seat portion 29 is formed by a cylindrical sheet member 41 made of aluminum. A fitting part 41a is formed on the body part 27 side of the sheet member 41,
The fitting portion 41a is fitted on the inner circumference of the outer cylinder member 33. On the opposite side of the main body 27 of the sheet member 41, an inner flange portion 41b is formed.
The end of the inner cylinder member 35 is fitted into b.

On the pipe member 31 side of the sheet member 41,
A flat seat portion 41c that is in contact with the inner surface of the tank 13 is integrally formed. At the center of the seat 41c, as shown in FIG. 4, a protrusion 41d is formed to be inserted into a through hole 13a formed in the tank 13. This projection 4
1d is a large-diameter portion 41e located in the through hole 13a of the tank 13, and a male screw portion 4 formed at the tip of the protruding portion 41d.
1f.

The through hole 1 formed in the tank 13
With the protrusion 41d inserted into the 3a, the washer member 43 is attached to the protrusion 41d from the outside of the tank 13 and the nut 45 serving as a holding member is screwed to the male screw portion 41f. Are fixed to the tank 13. The nut 45 and the washer member 43 are made of aluminum.
A brazing material layer is formed.

A recess 41h is formed at the center of the projection 41d, and one end of the pipe member 31 is fitted into the recess 41h. FIG. 1 shows the details of the mounting structure of the oil cooler 25 to the lower tank 13. The outer cylinder member 33 that constitutes the main body 27 of the oil cooler 25 is
It is in contact with the inner surface of the tank 13 along its longitudinal direction.

In the state shown in FIG. 1, the seat portion 29 of the oil cooler 25 is fixed to the through hole 13a of the tank 13 as shown in FIG. The above-described radiator with a built-in oil cooler is provided in the lower tank 13,
After incorporating the oil cooler 25 as shown in FIG.
The upper tank 13 and the lower tank 13 are assembled on both sides of the core portion 19.

In this state, the tank 13, the core 19, and the oil cooler 25 are integrally brazed by heat treatment in a heat treatment furnace. At the time of this heat treatment, since the outer surface of the outer cylinder member 33 of the main body 27 of the oil cooler 25 is in contact with the inner surface of the tank 13, heat from the tank 13 is transferred to the oil through the contact portion to the tank 13. Outer cylinder member 33 of main body 27 of cooler 25
And the outer cylinder member 33 is reliably heated.

Then, the heat of the outer cylinder member 33 is transmitted to the inner inner fins 37, the inner fins 37 rise in temperature, and the inner fins 37 are connected to the outer cylinder member 33 and the inner cylinder member 35.
Be sure to be brazed between. In the above-described radiator with a built-in oil cooler, since the outer surface of the outer cylindrical member 33 of the main body 27 of the oil cooler 25 contacts the inner surface of the tank 13, the oil cooler 25 is accommodated in the tank 13 of the radiator. Can be reliably brazed.

That is, conventionally, when the oil cooler 25 is housed in the tank 13, even when the radiator reaches the heat treatment temperature for brazing in the heat treatment furnace, the oil cooler 25 does not rise to the heat treatment temperature for brazing. It has been difficult to reliably braze each part of the oil cooler 25. However, in the above-described radiator with a built-in oil cooler, heat from the tank 13 is transferred to the main body of the oil cooler 25 through a contact portion with the tank 13. Since the power is transmitted to the outer cylindrical member 33 of the portion 27, components such as the inner fin 37 can be securely brazed.

In the above-described radiator with a built-in oil cooler, the main body 27 of the oil cooler 25 comes into contact with the inner surface of the tank 13 along its longitudinal direction.
The contact area with the oil cooler 25 can be increased, and the amount of heat transmitted from the tank 13 to the oil cooler 25 can be further increased. Further, in the above-described radiator with a built-in oil cooler, the seat portion 29 of the oil cooler 25 inserted into the through hole 13a formed in the tank 13 is fixed to the nut 45 serving as a holding member.
Therefore, the main body 27 of the oil cooler 25 can reliably contact the inner surface of the tank 13.

In the above-described method of manufacturing the radiator with a built-in oil cooler, the outer surface of the main body 27 of the oil cooler 25 is brought into contact with the inner surface of the tank 13 while the tank 1
3, the core 19 and the oil cooler 25 are assembled, and thereafter, the tank 13, the core 19 and the oil cooler 25 are assembled.
Are integrally brazed, so that the components of the oil cooler 25 can be reliably brazed while the oil cooler 25 is housed in the radiator tank 13.

FIG. 5 shows a main part of a radiator with a built-in oil cooler according to a second embodiment of the present invention. In this embodiment, the oil is located at a position offset from the center of the tank 13 to the side opposite to the tube 15. A cooler 25 is provided. The outer surface of the oil cooler 25 on the side of the seat 41 c of the outer cylinder member 33 and the outer surface of the outer cylinder member 33 located at an angle of 90 degrees from this outer surface are in contact with the inner surface of the tank 13.

In this embodiment, the same members as those in the first embodiment are denoted by the same reference numerals, and detailed description is omitted. In this embodiment, the attachment of the oil cooler 25 to the tank 13 is performed as described below. That is, first, as shown in FIG. 6A, the oil cooler 25 is inserted into the through hole 13a formed in the tank 13.
The oil cooler 25 is inserted into the tank 13 such that the seat 41c of the oil cooler 25 is located.

Next, as shown in (b), the oil cooler 25 is slightly rotated so that the projecting portion 41d of the oil cooler 25 does not interfere with the vicinity of the through hole 13a of the tank 13, and the oil cooler 25 projects The portion 41d is inserted into the through hole 13a. Next, as shown in (c), the washer member 43 is attached to the protrusion 41d of the oil cooler 25,
The nut 45 is screwed into the male screw part 41f of the protruding part 41d.

Then, by tightening the nut 45, the outer surface of the oil cooler 25 on the side of the seat 41c of the outer cylindrical member 33 and the outer surface of the outer cylindrical member 33 located at an angle of 90 degrees from the outer surface become the tank 13 Contact the inner surface of the
Next, as shown in (d), the pipe member 31 is fitted into a recess formed in the protrusion 41d of the oil cooler 25,
The attachment of the oil cooler 25 to the tank 13 is completed.

In this embodiment, two portions of the outer surface of the outer cylinder member 33 of the oil cooler 25 on the seat 41c side and the outer surface of the outer cylinder member 33 located at an angle of 90 degrees from the outer surface are connected to the tank 13 Since the contact is made with the inner surface, the contact area with the tank 13 can be increased, and the heat transfer to the oil cooler 25 can be increased. FIG. 7 shows a main part of a third embodiment of a radiator with a built-in oil cooler according to the present invention.
The oil cooler 25 is located at a position
Is arranged.

The outer cylinder member 33 of the oil cooler 25
Only the inner surface opposite to the tube 15 is in contact with the inner surface of the tank 13. That is, in this embodiment, as shown in FIG. 8, the seat member 41 of the oil cooler 25 is formed integrally with the second seat portion 41j above the seat portion 41c. Then, as shown in FIG.
j is brought into contact with the inner surface of the tank 13, and a gap 47 is provided between the inner surface of the tank 13 and the outer cylinder member 33 of the oil cooler 25.
Are formed.

In this embodiment, the same members as those in the first embodiment are denoted by the same reference numerals, and detailed description is omitted. In this embodiment, the inner surface of the tank 13 and the outer cylindrical member 3 of the oil cooler 25 are provided by the second seat portion 41j.
3, the flow of the cooling liquid can be improved.

FIG. 9 shows a main part of a fourth embodiment of a radiator with a built-in oil cooler according to the present invention. In this embodiment, a seat 41c of an outer cylinder member 33 of an oil cooler 25 is shown.
The outer surface on the opposite side is in contact with the inner surface of the tank 13. That is, in this embodiment, the oil cooler 25
Has a nut member 51 arranged above the seat 41c, as shown in FIG.

The nut member 51 is made of aluminum, and has a brazing material layer formed on both surfaces thereof. In this embodiment, a head 53 is provided at the tip of the pipe member 31.
A screw member 53 having a and a male screw portion 53b is fixed. The tip of the pipe member 31 is connected to the screw member 5.
3 protrudes.

In this embodiment, the same members as those of the first embodiment are denoted by the same reference numerals, and the detailed description is omitted. In this embodiment, the attachment of the oil cooler 25 to the tank 13 is performed as described below. That is, first, as shown in FIG. 11A, the oil cooler 2 is inserted into the through hole 13a formed in the tank 13.
5 so that the seat portion 41c of the nut member 51 is positioned.
At the same time, the oil cooler 25 is inserted into the tank 13.

Next, as shown in FIG.
1 is inserted into the tank 13 through the through hole 13a, and the male screw portion 53b of the screw member 53 is inserted.
Is screwed to the nut member 51. By rotating the head 53a of the screw member 53 while preventing the rotation of the nut member 51 with a jig (not shown), the nut member 51 moves toward the through hole 13a, and the edge of the through hole 13a The head member 53a of the screw member 53 and the nut member 51 are sandwiched and tightened.

At the same time, as shown in (d), the tip of the pipe member 31 is inserted into the concave portion 41k formed in the seat portion 41c of the seat member 41, and the oil cooler 25 is inserted by the tip of the pipe member 31. The outer surface opposite to the seat portion 41c is pressed against and contacts the inner surface of the tank 13. In this embodiment, the outer surface of the oil cooler 25 on the side opposite to the seat 41 c is pressed against the inner surface of the tank 13 by the tip of the pipe member 31. It can reliably contact the inner surface.

FIG. 12 shows a main part of a fifth embodiment of a radiator with a built-in oil cooler of the present invention. In this embodiment, a seat 41 of an outer cylinder member 33 of an oil cooler 25 is shown.
The outer surface opposite to c and the outer surface of the outer cylinder member 33 located at an angle of 90 degrees from this outer surface are in contact with the inner surface of the tank 13. In this embodiment, the same members as those of the fourth embodiment are denoted by the same reference numerals, and detailed description is omitted.

In this embodiment, since two portions of the outer cylinder member 33 of the oil cooler 25 are in contact with the inner surface of the tank 13, the area of contact with the tank 13 can be increased, and heat transfer to the oil cooler 25 side can be achieved. Can be increased.
FIG. 13 shows a sixth embodiment of the radiator with a built-in oil cooler of the present invention.
In this embodiment, an oil cooler 25A is provided with a connector 5 on both sides of a main body 55.
7 are arranged and formed.

That is, in this oil cooler 25A,
An inner cylinder member 61 made of aluminum is inserted into an outer cylinder member 59 made of aluminum. The enlarged diameter portions 61 a are formed on both sides of the inner cylinder member 61, and the enlarged diameter portions 61 a are brazed to the inner surface of the outer cylinder member 59. An inner fin 37 made of aluminum is arranged between the outer cylinder member 59 and the inner cylinder member 61.

A through hole 59a is formed on both sides of the outer cylinder member 59, and a connector 57 is arranged to cover the through hole 59a. The connector 57 is made of aluminum and spot-welded to the outer cylinder member 59. As shown in FIG. 14, the connector 57 has a seat portion 57a that is in contact with the outer surface of the outer cylinder member 59, and a projecting portion 57b formed to project from the seat portion 57a.

A male screw portion 57c to which the nut 45 is screwed is formed at the tip of the projecting portion 57b. Further, a hole 57d into which the pipe member 31 is inserted is formed in the protrusion 57b.
Are formed. The oil cooler 25A is located at a position deviated from the center of the tank 13 to the side opposite to the tube 15.
Is disposed, and the outer surface of the outer cylinder member 59 is
Is in contact with the inner surface of the other side of the tube 15.

In this embodiment, the same members as those of the first embodiment are denoted by the same reference numerals, and the detailed description is omitted. In this embodiment, the same effects as in the third embodiment can be obtained, but in this embodiment, the sheet member 41 can be eliminated. In the above-described radiator with a built-in oil cooler, an example in which the nut 45 is used as the holding member has been described. However, the present invention is not limited to this embodiment. For example, as shown in FIG. The annular groove 41
p, and a C-ring 6 to be mounted in the annular groove 41p.
3, the protrusion 41d may be held.

Then, with this configuration,
The projection 41d can be easily supported, and the projection 41d can be made compact. In the radiator with a built-in oil cooler,
Although the example in which the inner fin 37 is disposed between the outer cylinder member 33 and the inner cylinder member 35 of the oil cooler 25 has been described, the present invention is not limited to this embodiment. May be formed, and this projection may be brazed to the inner cylindrical member.

[0048]

As described above, in the radiator with built-in oil cooler according to the first aspect, the outer surface of the main body of the oil cooler is in contact with the inner surface of the tank, so that the oil cooler is stored in the tank of the radiator. Each part of the oil cooler can be securely brazed.

According to the radiator with built-in oil cooler of the present invention, since the main body of the oil cooler contacts the inner surface of the tank along the longitudinal direction, the contact area with the tank increases, and the oil is transmitted from the tank to the oil cooler. The amount of heat generated can be further increased. In the radiator with a built-in oil cooler according to the third aspect, the inner fin disposed between the outer cylinder member and the inner cylinder member can be securely brazed.

According to the radiator with built-in oil cooler of the fourth aspect, since the seat portion of the oil cooler is held by the holding member, the main body of the oil cooler can be reliably brought into contact with the inner surface of the tank. In the method for manufacturing a radiator with a built-in oil cooler, the tank, the core, and the oil cooler are assembled with the outer surface of the body of the oil cooler in contact with the inner surface of the tank. Since the cooler is integrally brazed, each part of the oil cooler can be reliably brazed in a state where the oil cooler is stored in the tank of the radiator.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing details of a main part of a radiator with a built-in oil cooler of FIG. 2;

FIG. 2 is a front view showing a first embodiment of a radiator with a built-in oil cooler of the present invention.

FIG. 3 is an explanatory view showing the oil cooler of FIG. 1;

FIG. 4 is a sectional view showing details of a main part of the oil cooler of FIG. 1;

FIG. 5 is an explanatory view showing a main part of a second embodiment of the radiator with a built-in oil cooler of the present invention.

FIG. 6 is an explanatory diagram showing a method of assembling an oil cooler in a tank in FIG.

FIG. 7 is an explanatory diagram showing a main part of a third embodiment of a radiator with a built-in oil cooler of the present invention.

FIG. 8 is an explanatory diagram showing the oil cooler of FIG. 7;

FIG. 9 is an explanatory view showing a main part of a fourth embodiment of a radiator with a built-in oil cooler of the present invention.

FIG. 10 is an explanatory view showing the oil cooler of FIG. 9;

FIG. 11 is an explanatory view showing a method of assembling an oil cooler in the tank in FIG.

FIG. 12 shows a fifth radiator with a built-in oil cooler of the present invention.
It is explanatory drawing which shows the principal part of embodiment.

FIG. 13 is a sixth radiator with a built-in oil cooler according to the present invention;
It is explanatory drawing which shows the principal part of embodiment.

FIG. 14 is an explanatory view showing the connector of FIG.

FIG. 15 is an explanatory view showing a main part of an example in which a C-ring is used in the radiator with a built-in oil cooler of the present invention.

[Explanation of symbols]

 11, 13 Tank 13a Through hole 19 Core part 25 Oil cooler 27 Main body part 29 Seat part 31 Pipe member 33 Outer cylinder member 35 Inner cylinder member 37 Inner fin 45 Nut

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3G013 DA02 DA16 3L065 AA06 FA13 FA19 3L103 AA01 AA06 AA13 BB15 BB39 CC02 CC08 DD03 DD10 DD33 DD34 DD38 DD42 DD85 DD97

Claims (5)

[Claims] A core (19) is formed between long tanks (11, 13) opposed to each other at a predetermined interval, and a long oil is provided in the tanks (11, 13). A radiator with a built-in oil cooler containing a cooler (25), wherein the tanks (11, 13), the core part (19) and the oil cooler (25) are formed of aluminum, and a main body part of the oil cooler (25) is provided. A radiator with a built-in oil cooler, wherein the outer surface of (27) is in contact with the inner surface of the tank (13). 2. The radiator with a built-in oil cooler according to claim 1, wherein a main body (27) of the oil cooler (25) is in contact with an inner surface of the tank (13) along a longitudinal direction thereof. Radiator with built-in oil cooler. 3. The radiator with built-in oil cooler according to claim 1, wherein the main body (27) of the oil cooler (25) is in contact with an inner surface of the tank (13). )When,
An inner cylinder member (35) inserted into the outer cylinder member (33)
A radiator with a built-in oil cooler, wherein an inner fin (37) is disposed between the outer cylinder member (33) and the inner cylinder member (35). 4. The radiator with a built-in oil cooler according to claim 1, wherein a pipe member (31) is mounted on both sides of a main body (27) of the oil cooler (25). Seat part (29)
Is formed, and the sheet portion (29) is held by the holding member (4).
A radiator with a built-in oil cooler, which is held in the tank (13) according to 5). 5. A core portion (19) is formed between long tanks (11, 13) arranged facing each other at a predetermined interval, and a long oil tank is formed in said tanks (11, 13). In a method of manufacturing a radiator with a built-in oil cooler containing a cooler (25), the tank (11, 13), the core (19) and the oil cooler (25) are formed of aluminum, and the oil cooler (25) is formed. The tank (11, 13), the core (19) and the oil cooler (25) are assembled in such a manner that the outer surface of the main body (27) is in contact with the inner surface of the tank (13). (11,
13) A method of manufacturing a radiator with a built-in oil cooler, comprising brazing the core part (19) and the oil cooler (25) integrally.