JP2005061708A - Bracket installing structure to header tank of heat exchanger - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a highly reliable bracket installing structure to a header tank of a heat exchanger, for securing sufficient joining strength, by closely and temporarily fixing and brazing a bracket into close contact to the header tank. <P>SOLUTION: This bracket installing structure is formed by installing the bracket 5 on the header tank of the heat exchanger. The bracket 5 is formed into a structure having a close contact part 12 brazed in close contact to the header tank 4, and a positioning claw part 14 inserted into a positioning hole part 10, and projecting in the header tank 4, without contacting with the positioning hole part 10 formed in the header tank 4, and installed in the header tank 4 by fixing the positioning claw part 14 in an opening peripheral edge part of the positioning hole part 10 in an inside surface 4b of the header tank 4. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a bracket mounting structure to a header tank of a heat exchanger, and more particularly to a bracket mounting structure to a header tank of a heat exchanger that can be attached in close contact with the header tank.

  For example, a bracket for attaching a heat exchanger to a vehicle is attached to a header tank of a heat exchanger such as a car cooler condenser. FIG. 12 shows an example of a mounting structure of the bracket to the header tank of the heat exchanger. In this bracket mounting structure, the bracket 104 is mounted by spot welding to a header tank 103 in which the tube end portion of the core formed by alternately laminating the cooling fins 101 and the tubes 102 is inserted and fixed. Specifically, when the header tank 103 is attached to the core, the bracket 104 is set on a positioning jig and a temporary holding jig, and the bracket 104 is temporarily attached by spot welding such as argon, and then integrated in a heating furnace. Are joined together.

  However, this attachment method requires expensive equipment such as a positioning jig and a welding machine, which increases costs. Further, since the welding work is a human skill work, there are many variations and it is one of the factors affecting the quality.

  In order to solve this problem, there has been proposed a bracket mounting structure in which a notch is formed in the header tank and temporarily fixed by fitting a protrusion formed on the bracket into the notch (for example, Patent Document 1). Etc.)

  As shown in FIG. 13, this bracket mounting structure has a hook claw formed on a bracket 104 with respect to a header tank 103 that inserts and fixes the tube end of a core formed by alternately laminating cooling fins 101 and tubes 102. 105 is engaged with the indented portion 106 of the header tank 103, and the convex portion 107 formed on the bracket 104 is inserted and fitted into the notch portion 108 of the header tank 103, whereby the bracket 103 is temporarily fixed to the header tank 103. I am letting.

  However, with this mounting method, notches and claws are located at multiple locations. Due to variations in component accuracy, problems such as inability to assemble and poor connection (leakage) to the notch fittings become a problem. A big influence.

In view of this, a bracket mounting structure has been proposed in which assemblability is improved by providing one protrusion and one hole fitted therein (see, for example, Patent Document 2). As shown in FIGS. 14 and 15, this bracket mounting structure is provided by providing a small protrusion 109 on the bracket 104 and fitting the small protrusion 109 into a fitting hole 110 formed in the header tank 103 to temporarily fix it. Yes.
JP-A-9-178387 (pages 3 and 4 and FIG. 1) Japanese Patent Laid-Open No. 11-281286 (pages 3 and 4 and FIG. 1)

  Incidentally, as shown in FIG. 16 (a), when the base portion 109a of the small protrusion 109 has an R shape, the bracket 104 is lifted from the header tank 103 and brazed as shown in FIG. 16 (b). The strength between the bracket 104 and the header tank 103 cannot be ensured. For this reason, it is conceivable to use the root portion 109a of the small protrusion 109 as an edge, but doing so increases the part processing cost. In addition, when the edge processing is performed, the crystal of the protrusion material is remarkably broken, and the brazing material is significantly eroded by brazing heating, which may result in a through hole, which causes liquid leakage.

  For this reason, as shown in FIG. 5C, it may be possible to prevent the bracket 104 from being lifted by providing a tapered portion 111 at the peripheral edge of the opening of the fitting hole 110. Since the brazing area is reduced, the holding power is insufficient until brazing is completed, and the brazing reliability is hindered.

  Accordingly, the present invention has been made to solve the above-described problems, and can reliably fix the brazing to the header tank without any gap, and can be brazed to secure sufficient bonding strength. It aims at providing the bracket attachment structure to the header tank of a heat exchanger with high property.

  The invention according to claim 1 is a bracket mounting structure in which a bracket is attached to a header tank of a heat exchanger, wherein the bracket is closely attached to the header tank and brazed, and the header tank A positioning claw portion that is inserted into the positioning hole portion and protrudes into the header tank without contacting the formed positioning hole portion, and the positioning claw portion is located on the inner surface of the header tank. It is fixed to the peripheral edge of the opening and attached to the header tank.

  The invention according to claim 2 is the bracket mounting structure to the header tank of the heat exchanger according to claim 1, wherein the positioning claw portion is formed at the tip of the folded portion folded from the tip side of the contact portion. In addition to being formed, the contact portion is inserted into a hole formed in the contact portion and protrudes from the contact surface, and the contact portion is formed between the folded portion and the header tank.

  The invention according to claim 3 is a bracket mounting structure to the header tank of the heat exchanger according to claim 1 or 2, wherein the positioning claw portion is caulked.

  The invention according to claim 4 is a bracket mounting structure to the header tank of the heat exchanger according to claim 1 or claim 3, wherein the positioning claw portion is an opening of a hole formed in the contact portion. It is formed at the tip of the folded portion once folded outward from the peripheral portion, and the tip side of the folded portion is bent, inserted into the hole, and protrudes from the contact surface.

  According to the first aspect of the present invention, the positioning claw portion formed in the bracket is inserted into the positioning hole portion without contacting the positioning hole portion formed in the header tank, and the positioning claw portion is inserted into the header tank. Since it is fixed to the opening peripheral edge of the positioning hole on the side surface, the close contact portion of the bracket can be closely attached to the header tank, and the bonding strength can be increased by expanding the brazing area. However, there is no abnormal erosion (diffusion) of the brazing material, and a stable product can be provided. In addition, according to the present invention, since it is possible to cope with the general bending R of the normal press working without requiring the edge processing of the bent portion as in the prior art, the manufacturing cost can be greatly reduced. .

  According to the second aspect of the present invention, the positioning claw portion is formed at the tip of the folded portion folded back from the distal end side of the close contact portion and inserted into the hole formed in the close contact portion, and between the folded back portion and the header tank. Since the close contact portion is formed and the positioning claw portion is not formed on the surface of the close contact portion facing the header tank, the close contact portion can be closely contacted with the header tank.

  According to the third aspect of the present invention, the caulking of the positioning claw portion improves the adhesion between the adhesion portion and the header tank, and brazing between them is more stable and a strong bonding strength is obtained. Further, according to the present invention, the conventional spot welding can be eliminated by caulking the positioning caulking claw from the inside of the header tank, and the manufacturing cost can be reduced.

  According to the fourth aspect of the invention, since the positioning claw portion is formed at the tip of the folded portion that is once folded outward from the opening peripheral edge portion of the hole portion formed in the close contact portion, the bracket can be reduced in size.

  Hereinafter, specific embodiments to which the present invention is applied will be described in detail with reference to the drawings.

[Configuration of heat exchanger]
1 is a perspective view of the main part of the heat exchanger, FIG. 2 is an exploded perspective view of the heat exchanger, FIG. 3 is a perspective view of the bracket when viewed from the side opposite to the header tank mounting surface, and FIG. FIG. 5 is a plan view of the bracket mounting portion when viewed from above, FIG. 6 is an enlarged cross-sectional view of the main portion of the bracket mounting portion, and FIG. 7 is an assembly showing the bracket mounting procedure. It is process drawing.

  As shown in FIG. 1, the heat exchanger according to the present embodiment cooperates with a long tube 1 through which a fluid flows and a wind (fluid) flowing through the tube 1 against the tube 1. Cores 3 formed by alternately superimposing a plurality of cooling fins 2 for cooling, and extending in a direction substantially orthogonal to the longitudinal direction of the tubes 1 and attached to both ends of the cores 3. A header tank 4 is provided, and a bracket 5 attached to the header tank 4 is provided.

  As shown in FIGS. 1 and 2, the core 3 is composed of tubes 1 and cooling fins 2 and is formed by brazing a plurality of these alternately. The tube 1 is formed, for example, as a long plate having an aluminum alloy having a substantially flat cross section. And in this tube 1, the flow path which flows in a refrigerant | coolant into the inside is penetrated and formed from the one end to the other end in the longitudinal direction.

  As shown in FIGS. 1 and 2, the cooling fin 2 serves to cool the coolant flowing through the tube 1 in cooperation with the wind that hits the tube 1. The cooling fin 2 is formed into a bellows shape by processing a long and narrow metal plate with a wave-shaped roller.

  As shown in FIGS. 1 and 2, the header tank 4 is composed of a plate 6 and a tank 7 assembled to the plate 6, and the plate 6 and the tank 7 are fixed by caulking. A flow path 8 for introducing a refrigerant is formed.

  The plate 6 and the tank 7 are formed by fitting both side edges of the tank 7 in contact with the inner surface of the plate 6. The plate 5 is formed with a plurality of insertion holes 9 for inserting and fixing the tube 1 at predetermined intervals in the longitudinal direction. The insertion hole 9 is formed as an elongated slit hole into which the end 1a of the tube 1 is inserted. On the other hand, the tank 7 is formed with a positioning hole portion 10 into which a positioning claw portion formed in the bracket 5 described later is inserted. The positioning hole portion 10 is formed as an opening hole having a size that can be in non-contact with the positioning claw portion.

  As shown in FIGS. 3 and 4, the bracket 5 includes a vehicle attachment portion 11 that is fixed to the vehicle, and a contact portion 12 that is in close contact with the header tank 4 and brazed. The contact portion 12 is substantially L-shaped.

  An attachment hole 13 for fixing the bracket 5 to the vehicle by a fastener or the like is formed in the vehicle attachment portion 11. The close contact portion 12 has a curved shape that can be in close contact with the outer side surface 4 a of the header tank 4. The contact portion 12 includes a positioning claw portion 14 that is inserted into a positioning hole portion 10 formed in the header tank 4 and protrudes into the header tank 4, and the positioning claw portion 14 is disposed outward from the contact portion 12. A hole 16 is formed so as to protrude to the rear.

  As shown in FIGS. 5 and 6, the positioning claw portion 14 is formed by bending the tip of the folded portion 15 that is folded back from the tip side of the contact portion 12 so as to fold over the contact portion 12 at a substantially right angle. Yes. The positioning claw portion 14 has a tip portion protruding outward from the contact surface 12 a of the contact portion 12 through a hole 16 formed in the contact portion 12. The positioning claw portion 14 is inserted into the positioning hole 10 without contacting the positioning hole 10 formed in the header tank 4 and protrudes into the header tank 4, and its tip is caulked. The positioning hole 10 is fixed to the opening peripheral edge.

  Thus, the positioning claw portion 14 formed in the bracket 5 is inserted into the positioning hole portion 10 without contacting the positioning hole portion 10 formed in the header tank 4, and the positioning claw portion 14 is inserted into the header tank 4. Since the inner side surface 4b is fixed to the opening peripheral edge of the positioning hole portion 10, there is no root portion of the positioning claw portion 14 on the contact surface 12a, so that the contact portion 12 of the bracket 5 is in close contact with the header tank 4 without a gap. Can be made. As a result, it is possible to increase the bonding strength by expanding the brazing area, and to provide a stable product without abnormal erosion of the brazing material even during brazing. Moreover, since the positioning nail | claw part 14 can respond | correspond by the general bending R of a normal press work, manufacturing cost can be reduced significantly.

  In addition, since the bracket 5 is temporarily fixed to the header tank 4 by caulking the positioning claws 14, the adhesion between the adhesion portion 12 and the header tank 4 is improved, and brazing between them is more stable. And strong bonding strength can be obtained. Further, by caulking the positioning claw portion 14 from the inside of the header tank 4, the conventional spot welding can be eliminated, and the manufacturing cost can be reduced.

  To attach the bracket 5 to the tank 7 of the header tank 4, as shown in FIG. 7, the positioning claw portion 14 is inserted into the positioning hole 10 formed in the tank 7, and the contact portion 12 is attached to the tank 7. Then, the bracket 5 is fixed to the header tank 4 by caulking the positioning claws 14 protruding into the tank 7 as shown in FIG.

  As described above, the bracket mounting structure according to the present embodiment includes one protrusion and a hole portion into which the protrusion is inserted. Therefore, the accuracy of parts is more varied than a structure including a plurality of protrusions and hole portions. It can be easily assembled and productivity can be improved.

[Other embodiments]
In the above-described embodiment, the bracket 5 is fixed to the header tank 4 by caulking the positioning claws 14 that protrude into the header tank 4. However, as shown in FIG. 8, the bracket 5 protrudes into the header tank 4. The positioning claw portion 14 may be bent and brought into close contact with the inner side surface 4b of the header tank 4 as shown in FIG.

  Further, in the above-described embodiment, the positioning claw portion 14 is formed at the tip end of the folded portion 15 that is folded back from the tip end side of the close contact portion 12, and is inserted into the hole portion 16 formed in the close contact portion 12. Although it protruded from 12a, it may be formed as follows.

  For example, as shown in FIG. 10, the positioning claw part 14 is temporarily folded from the opening peripheral part of the hole part (notch hole part) 16 whose one end is opened to the outside opposite to the contact surface 12a substantially vertically. 15 is formed at the tip, and the tip of the folded portion 15 is bent and inserted into the hole 16 so as to protrude from the contact surface 12a.

  Alternatively, as shown in FIG. 11, the folded portion 15 is folded in the short side direction of the contact portion 12, the positioning claw portion 14 is formed at the tip, and the tip side of the folded portion 15 is bent and inserted into the hole 16. The positioning claw portion 14 may protrude from the hole portion 16.

  If the positioning nail | claw part 14 is formed as shown in these FIG.10 and FIG.11, the bracket 5 can be reduced in size.

It is a principal part perspective view of the heat exchanger of this Embodiment. It is a disassembled perspective view of the heat exchanger of this Embodiment. It is a bracket of the heat exchanger of this Embodiment, Comprising: It is a perspective view of a bracket when it sees from the opposite side to a header tank attachment surface. It is a heat exchanger of this Embodiment, Comprising: It is a perspective view of a bracket when it sees from a header tank attachment surface. It is a heat exchanger of this Embodiment, Comprising: It is a top view when a bracket attachment part is seen from the top. It is a heat exchanger of this Embodiment, Comprising: It is a principal part expanded sectional view of a bracket attachment part. It is a heat exchanger of this Embodiment, Comprising: It is an assembly | attachment process figure which shows the attachment procedure of a bracket. It is a heat exchanger of the form of this invention, Comprising: It is a principal part expanded sectional view of the bracket attachment part which shows the state before bending a positioning nail | claw part and making it closely_contact | adhere to the inner surface of a header tank. It is a heat exchanger of this Embodiment, Comprising: It is a principal part expanded sectional view of the bracket attachment part which shows the state which bent the positioning nail | claw part and was closely_contact | adhered to the inner surface of the header tank. It is a perspective view of the bracket which shows the other example of the heat exchanger of this Embodiment. It is a perspective view of the bracket which shows the other example of the heat exchanger of this Embodiment. It is a front view which shows an example of the attachment structure of the bracket to the header tank of the conventional heat exchanger. It is a perspective view which shows the other example of the attachment structure of the bracket to the header tank of the conventional heat exchanger. The other example of the attachment structure of the bracket to the header tank of the conventional heat exchanger is shown, (a) is sectional drawing before bracket attachment, (b) is a front view of a bracket attachment part. In the bracket attachment structure of FIG. 14, it is a principal part expanded sectional view of a bracket attachment part. In the bracket mounting structure of FIG. 14, (a) is an enlarged cross-sectional view of the main part of the bracket in which the R shape is formed at the base of the small protrusion, and (b) is the bracket formed by the R shape formed at the base of the small protrusion. The principal part expanded sectional view of the state which floated from the header tank, (c) is a principal part expanded sectional view of the bracket which provided the taper part in the opening peripheral part of the fitting hole part, and prevented the bracket from raising.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Tube 2 ... Cooling fin 3 ... Core 4 ... Header tank 5 ... Bracket 6 ... Plate 7 ... Tank 10, 16 ... Hole part 12 ... Contact part 12a ... Contact surface 14 ... Positioning claw part 15 ... Folding part

Claims (4)

A bracket mounting structure in which a bracket (5) is mounted on a header tank (4) of a heat exchanger,
The bracket (5) is not in contact with the close contact portion (12) to be brazed in close contact with the header tank (4) and the positioning hole portion (10) formed in the header tank (4). A positioning claw portion (14) that is inserted into the positioning hole (10) and protrudes into the header tank (4), and the positioning claw portion (on the inner surface (4b) of the header tank (4) ( 14) A bracket mounting structure to a header tank of a heat exchanger, wherein 14) is fixed to the peripheral edge of the opening of the positioning hole (10) and attached to the header tank (4). A bracket mounting structure to the header tank of the heat exchanger according to claim 1,
The positioning claw portion (14) is formed at the tip of the folded portion (15) folded back from the tip side of the contact portion (12), and the hole portion (16) formed in the contact portion (12). The heat exchanger header is characterized in that the contact portion (12) is inserted between the folded portion (15) and the header tank (4). Bracket mounting structure to the tank. A bracket mounting structure to the header tank of the heat exchanger according to claim 1 or 2,
The bracket mounting structure to the header tank of the heat exchanger, wherein the positioning claw (14) is caulked. A bracket mounting structure to the header tank of the heat exchanger according to claim 1 or 3,
The positioning claw (14) is formed at the tip of the folded portion (15) that is once folded outward from the peripheral edge of the opening of the hole (16) formed in the close contact portion (12). A bracket mounting structure to a header tank of a heat exchanger, wherein the tip end side of the portion (15) is bent and inserted into the hole (16) and protrudes from the contact surface (12a).

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