JPH06281385A - Heat exchanger with mounting bracket - Google Patents

Abstract

PURPOSE:To obtain a brazing strength of a tank to a mounting bracket and to so form a flat part formed with a cutout for inserting a bolt and a mounting surface of a vehicle body side that the flat part is brought into contact with the mounting surface. CONSTITUTION:A connecting part 16 of a mounting bracket 21 is brought into contact only with an outer peripheral surface of a tank 5 from an outside to a rear back side. Bent parts 19, 19 bent to the rear back are provided at both upper and lower edges of a mounting 17. A contact plate 22 provided between both the parts 19 and 19 has a flat part 23 and the rear surface of the flat part 23 is disposed in plane with the edges of the parts 19, 19.

Description

Detailed Description of the Invention

[0001]

The heat exchanger with a mounting bracket according to the present invention can be used as a radiator for radiating cooling water of an automobile engine or as a condenser for radiating refrigerant of an air conditioner.

[0002]

2. Description of the Related Art As a radiator and a condenser, a heat exchanger made of aluminum or an aluminum alloy (in the present specification, these are collectively referred to as "aluminum material") is widely used. Such an aluminum heat exchanger needs to be supported on the vehicle body of an automobile through a mounting bracket. Therefore, conventionally, the heat exchanger has been mounted on the vehicle body by the mounting bracket 1 as shown in FIGS. First, this conventional structure will be described.

A tank 5 is provided at an end of a core portion 4 composed of a large number of heat transfer tubes 2, 2 and fins 3, 3. Inside the tank 5, the ends of the heat transfer tubes 2, 2 are arranged. It is in communication. Side supports 6 are provided on both sides of the core portion 4,
Both ends of each side support 6 are joined to the tank 5 to reinforce the core portion 4. The mounting bracket 1 is fixed to the outer surface of the tank 5 by brazing.

The mounting bracket 1 has a joining portion 8 for joining the mounting bracket 1 to the outer peripheral surface of the tank 5.
And a mounting portion 9 for mounting the mounting bracket 1 on the vehicle body. The joint portion 8 therein includes a pair of upper and lower front side contact portions 10 and 10, which are in contact with each other from the front surface to the outer side surface of the tank 5, and the front side contact portions 10 and 10.
The tank 5 is provided in a state of being sandwiched between the tank 5 and a rear contact portion 11 which contacts the outer surface from the rear surface of the tank 5.

Such a joint portion 8 is brazed and fixed to the upper outer surface portion of the tank 5. This brazing operation is carried out at the same time as brazing the constituent members of the heat exchanger, that is, the heat transfer tubes 2, 2, the fins 3, 3 and the tank 5. During the brazing work, the above-mentioned members are temporarily fixed by a jig as described in Japanese Utility Model Laid-Open No. 4-94159. Prior to the brazing work, the front edges of the front and rear contact portions 10, 11 and the tank 5 and the outer peripheral surface are temporarily fixed by spot welding.

The one mounting portion 9 has a pair of upper and lower bending portions 12, 12 formed by bending a plate portion constituting the mounting portion 9 to the front side. The bent portions 12, 12 are necessary for ensuring the rigidity of the mounting portion 9. The portion sandwiched between the two bent portions 12, 12 is an abutting plate portion 13 that abuts on a mounting surface provided on the vehicle body side. Further, a purse-shaped notch 7 is formed on the outer edge of the contact plate portion 13. A mounting bolt is inserted into the notch 7.

When the mounting bracket 1 constructed as described above is brazed and fixed to the outer surface of the tank 5 and the heat exchanger with the mounting bracket is supported on the vehicle body, it is formed on the contact plate portion 13. The bolt inserted into the cutout 7 is screwed into a screw hole provided in the mounting surface on the vehicle body side and further tightened. A cushioning material may be interposed between the abutment plate portion 13 of the mounting bracket 1 and the mounting surface to prevent vibration from being transmitted from the vehicle body to the heat exchanger.

[0008]

However, when the mounting bracket 1 having the above-described shape is brazed and fixed to one side surface portion of the tank 5, each front side is often exaggerated as shown in FIG. A gap 14 is formed between the inner peripheral surface 10a of the abutting portion 10 and the outer peripheral surface 5a of the tank 5, and both peripheral surfaces 1
Brazing between 0a and 5a becomes defective. In this state, the mounting bracket 1 and the tank 5 are brazed to the tank 5 only at the inner peripheral surface 11a of the rear contact portion 11.

When the present inventor studied the cause of such a problem, it was found that one of the causes was the sagging of the mounting bracket 1 due to the heat during the heat brazing. That is, at the time of heating brazing, it is necessary to melt the brazing material made of an aluminum alloy containing a large amount of silicon (Si). Therefore, the mounting bracket 1 made of aluminum is also
Although it does not melt, it is unavoidable that it softens and its rigidity decreases. On the other hand, since a connector or the like is brazed to the rear rear surface of the tank 5, it is necessary to perform the brazing operation with the rear rear surface facing up, as shown in FIGS.

As described above, when the brazing work is performed with the rear rear surface of the tank 5 facing upward and the mounting portion 9 of the mounting bracket 1 protruding horizontally from the outer surface of the tank 5, the rigidity is softened and the rigidity is reduced. The mounting bracket 1 is lowered by its own weight due to the lowered sagging of the rear contact portion 13. The front edge of each front contact portion 10, 10 and the outer peripheral surface 5a of the tank 5 are
Although temporary fixing is performed by spot welding, the strength of the temporary fixing is extremely reduced when the parts 10, 5 are softened due to the temperature rise due to heating. 8 and the gap 14 is formed between the inner peripheral surface 10a of each front contact portion 10 and the outer peripheral surface 5a of the tank 5, as shown in FIG.

For example, as apparent from the description of FIG. 5,
The area of the inner peripheral surface 11a of the rear contact portion 11 is small, and it is difficult to obtain sufficient brazing strength by brazing the mounting bracket 1 and the tank 5 only with this inner peripheral surface 11a portion. For this reason, the heat exchanger with the mounting bracket in which the brazing failure as shown in FIG. 8 has occurred must be discarded as a defective product, which causes the yield to deteriorate.

In view of such circumstances, the present inventor has considered a mounting bracket 15 as shown in FIGS. 9 to 11 (not yet applied) before completing the present invention. This mounting bracket 15
Like the above-mentioned conventional mounting bracket 1, has a joint portion 16 for joining to the outer peripheral surface of the tank 5 and a mounting portion 17 for attaching to the vehicle body. The joint portion 16 in this portion contacts the outer peripheral surface 5a of the tank 5 only from the outer portion of the tank 5 to the rear portion thereof. A small circular hole 18 is formed at the center of the joint portion 16, and the joint portion 16 and the tank 5 can be spot-welded at the inner peripheral edge portion of the small circular hole 18. The mounting portion 17 has a pair of upper and lower bent portions 19 and 1 formed by bending both upper and lower edge portions toward the rear side.
9 is formed to ensure the rigidity of the mounting portion 17.

Mounting bracket 1 having a shape as described above
In the case of No. 5, even if the mounting bracket 15 is softened by heating for brazing, the adhesion between the inner peripheral surface 16a of the joint portion 16 and the outer peripheral surface 5a of the tank 5 is secured. Therefore, the brazing strength between the mounting bracket 15 and the tank 5 is secured, but a new inconvenience as described below occurs.

That is, the mounting bracket 15 needs to be supported and fixed to a mounting surface provided on the rear side of the mounting bracket 15, but in the case of the mounting bracket 15 having a shape as shown in FIGS. The tip edges of the bent portions 19, 19 abut the mounting surface, and the flat portion 20 having the notch 7 for inserting the bolt is separated from the mounting surface. If the bolts are tightened in this state, the bent portions 19 and 19 and the flat portion 20 are deformed, and the desired mounting strength cannot be obtained.

The heat exchanger with a mounting bracket of the present invention was invented in view of the above-mentioned circumstances.

[0016]

The heat exchanger with a mounting bracket according to the present invention comprises a large number of heat transfer tubes and fins each made of an aluminum material, like the heat exchanger with a mounting bracket described above. Aluminum having a tank made of an aluminum material and having a circular cross section, which communicates the core portion and the end of each heat transfer tube, a joining portion for joining to the outer peripheral surface of this tank, and an attaching portion for attaching to the vehicle body. It consists of a mounting bracket made of wood.

In particular, in the heat exchanger with the mounting bracket of the present invention, the joint portion of the mounting bracket is in contact with the outer peripheral surface of the tank only from the outer side of the tank to the rear side. The mounting portion has a pair of upper and lower bent portions formed by bending both upper and lower edge portions toward the rear side, and a portion sandwiched between the folded portions bulges toward the rear side and has a flat portion at least in the vertical direction. It is characterized in that it is provided with the formed contact plate portion and the mounting member insertion portion formed in this contact plate portion.

[0018]

In the heat exchanger with the mounting bracket of the present invention configured as described above, even if the mounting bracket is softened by heating for brazing, a sufficient contact area between the joint and the tank is ensured. As a result, sufficient brazing strength between the tank and the mounting bracket can be secured. Further, the flat portion of the contact plate portion can come into contact with the mounting surface on the vehicle body side. Therefore, even if the flat member is strongly pressed toward the mounting surface by the mounting member inserted through the mounting member insertion portion, the mounting bracket does not deform.

[0019]

1 to 3 show an embodiment of the present invention.
The feature of the present invention lies in the shape of the mounting bracket 21 for brazing and fixing to the outer surface of the tank 5 to support and fix the tank 5 to the vehicle body. This mounting bracket 2
The structure of the heat exchanger to which 1 is brazed and fixed is the same as that of the above-mentioned conventional heat exchanger with a mounting bracket. Therefore, redundant description will be omitted, and the mounting bracket 21 will be described below.

The mounting bracket 21 has a joint portion 16 for joining to the outer peripheral surface of the tank 5 and a mounting portion 17 for attaching to the vehicle body. The joint portion 16 in this portion contacts the outer peripheral surface 5a of the tank 5 only from the outer portion of the tank 5 to the rear portion thereof. A small circular hole 18 is formed at the center of the joint portion 16, and the joint portion 16 and the tank 5 can be spot-welded at the inner peripheral edge portion of the small circular hole 18. Further, the mounting portion 17 has a pair of upper and lower bent portions 19 formed by bending both upper and lower edge portions toward the rear side to secure the rigidity of the mounting portion 17. In the case of the illustrated embodiment, the bent portions 19 and 19 are the same as the mounting portion 1 described above.
It is formed over the entire length of 7 and the base half of the joint 16.

Further, the portion sandwiched between the both bent portions 19 and 19 bulges rearward to form a contact plate portion 22. The abutting plate portion 22 has a flat portion 23 over its entire width.
I am trying. Then, the rear surface of the flat portion 23 and the leading edges of the bent portions 19, 19 are located on substantially the same plane. The flat portion 23 has a purse-like notch 7
Is formed as a mounting member insertion portion.

In the case of the heat exchanger with a mounting bracket of the present invention configured as described above, even if the mounting bracket 21 is softened by heating for brazing, the inner peripheral surface 16a of the joint portion 16 and the tank 5 are A sufficient contact area with the outer peripheral surface 5a can be ensured, and a sufficient brazing strength between the tank 5 and the mounting bracket 21 can be ensured.

That is, even when the mounting bracket 21 is softened, the weight of the mounting bracket 21 is
The inner peripheral surface 16a of the joint portion 16 and the outer peripheral surface 5a of the tank 5
The force in the direction away from and does not act, but rather both peripheral surfaces 16a,
5a tend to be close to each other. As a result, as described above,
A sufficient contact area between the inner peripheral surface 16a of the joint portion 16 and the outer peripheral surface 5a of the tank 5 is ensured, and sufficient brazing strength between the tank 5 and the mounting bracket 21 is ensured.

Further, since the rear surface of the flat portion 23 provided on the abutting plate portion 22 is located on substantially the same plane as the tip edges of the both bent portions 19, 19, the rigidity of the mounting portion 17 can be secured sufficiently. The flat portion 23 and the mounting surface on the vehicle body side can come into contact with each other. Therefore, even if the flat portion 23 is strongly pressed toward the mounting surface by tightening the mounting member such as the bolt inserted through the notch 7, the mounting bracket 21 will not be deformed.

[0025]

The heat exchanger with the mounting bracket of the present invention is
Since it is configured and operates as described above, it is possible to improve the brazing property between the tank and the mounting bracket, prevent the generation of defective products due to defective brazing, and improve the product yield.

[Brief description of drawings]

FIG. 1 is a front view of a mounting bracket showing an embodiment of the present invention.

FIG. 2 is a plan view of the same.

FIG. 3 is a right side view of the same.

FIG. 4 is a front view of a main part showing a first example of a conventional structure.

FIG. 5 is a front view showing a conventional mounting bracket.

FIG. 6 is a plan view of the same.

FIG. 7 is a right side view of the same.

FIG. 8 is a plan view showing a state where a conventional mounting bracket is deformed by heating during brazing.

FIG. 9 is a front view of a mounting bracket considered prior to the present invention.

FIG. 10 is a plan view of the same.

FIG. 11 is a right side view of the same.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Mounting bracket 2 Heat transfer tube 3 Fin 4 Core part 5 Tank 5a Outer peripheral surface 6 Side support 7 Notch 8 Joint part 9 Mounting part 10 Front side contact part 10a Inner surface 11 Rear side contact part 11a Inner surface 12 Bent part 13 Contact plate part 14 Gap 15 Mounting bracket 16 Joining part 16a Inner peripheral surface 17 Mounting part 18 Small circular hole 19 Bending part 20 Flat part 21 Mounting bracket 22 Contact plate part 23 Flat part

Claims (1)

[Claims] 1. A tank made of an aluminum material and having a circular cross section, in which a core portion composed of a large number of heat transfer tubes and fins each made of an aluminum material communicates with an end portion of each heat transfer tube, and a tank of this tank In a heat exchanger with a mounting bracket, which comprises a mounting bracket made of an aluminum material, having a bonding portion for bonding to the outer peripheral surface and a mounting portion for mounting on the vehicle body, the bonding portion of the mounting bracket is the outer periphery of the tank. The surface of the tank is abutted only from the outer side of the tank to the rear part of the tank, and the mounting part has a pair of upper and lower bent parts formed by bending both upper and lower end edges to the rear part of the tank, and both the bent parts. A contact plate portion that bulges a sandwiched portion to the rear side and a flat portion is formed at least in the vertical middle portion; and a mounting member insertion portion formed in the contact plate portion. Mounting Heat exchanger with bracket.