KR200346165Y1 - Unbonded coupling structure between the radiator header and the side support - Google Patents

Abstract

The present invention relates to an unbonded coupling structure between a radiator header and a side support, and includes a header and side support of a radiator that can prevent a tube damage caused by a difference in thermal expansion and a tube and a side support, and a coolant leakage problem. The purpose is to provide an unbonded coupling structure.

In the non-joint coupling structure of the header and the side support according to the present invention, the tab 15 is formed so that the lower and both sides of the upper tank part 1 and the lower tank part 2 are opened to both ends and the outer side downward. A header and side support of the radiator for coupling the bent headers 11 and 21 and the side supports 4 supporting both sides of the radiator core 3 installed between the upper tank portion and the lower tank portion, respectively; As an unbonded coupling structure, the inner bent portion 42 is bent at both ends or one end of the side support to be inserted into and coupled to the tab opposite to the bending direction of the tab. The brazing material is coated only on the portions except the tabs 15 on the bottom surfaces of the headers 11 and 21, and the brazing material is not coated on the outer circumferential surface of the bent portion 42 of the side support 4 inserted into the tab. Therefore, since the brazing material is not coated on the contact surface between the tab 15 and the bent portion 42 of the side support 4, the tab 15 and the bent portion 42 are not joined to each other even when brazing to manufacture a radiator.

Description

Unbonded coupling structure between the radiator header and the side support

The present invention relates to an unbonded coupling structure between the radiator header and the side support. In particular, the radiator header and the side support can be prevented from the tube damage caused by the difference between the tube and the side support and the thermal expansion and the leakage of the coolant. It relates to an unbonded coupling structure.

In general, in a vehicle equipped with an internal combustion engine, heat generated by the engine is conducted to the cylinder header, piston, valve, and the like, and when the temperature transmitted to these parts becomes excessively high, the strength of the component due to thermal expansion or deterioration is reduced. As a result, the engine life is shortened, the combustion condition worsens, knocking and premature ignition occur, and the output of the engine is reduced. In addition, when the engine is incompletely cooled, the oil film on the inner circumferential surface of the cylinder is broken, and the lubrication function is degraded. Also, the engine oil is deteriorated, which causes abnormal cylinder wear and the piston is fused to the inner wall of the cylinder. do.

Therefore, in order to cool such an engine, a water-cooled cooling device is usually installed in an automobile, which is configured to circulate the coolant by a water pump in a water jacket provided in the cylinder block and the cylinder header to promote the cooling operation of the engine. A radiator, a cooling fan, and a water temperature controller are provided for heat dissipation.

On the other hand, the radiator is a device for circulating the cooling water warmed from the engine to cool by heat dissipation, as shown in Figure 2, having an upper tank portion 5, the lower tank portion 6 and the radiator core 7, The upper tank portion 5 is provided with a radiator cap 51, an overflow pipe (not shown) and an inlet pipe 52, and the lower tank portion 6 has an outlet pipe 61 and a drain cock (not shown). Installation (Oil Cooler is installed inside when cooling the mission oil) In addition, the upper tank portion 5 has a header 55 having a plurality of through holes (not shown) along the longitudinal direction and an upper tank 56 covering the header 55 to form a flow path, and the lower tank portion 6 also has a header 65 in which a plurality of through holes (not shown) are formed along the longitudinal direction, and a lower tank 66 covering the header 65 to form a flow path. In addition, both ends of the radiator core 7 are inserted into the through holes of the upper header 55 and the through holes of the lower header 65 to allow the upper tank portion 5 and the lower tank portion 6 to pass through each other. A plurality of tubes 71 and the heat dissipation fins 72 for dissipating the cooling water flowing therebetween. Side radiators 9 are provided on both sides of the radiator core 7, respectively, and tabs 57 formed at both ends of the upper header 55 and the lower header 65 (see FIG. 3, respectively). The tab formed on the lower header 65 is not shown for convenience and will be inserted into and bonded to the upper header 55 hereinafter only to reinforce the radiator core 7. As described above, the manufacture of the radiator is completed by brazing the radiator assembly in which the components are assembled in turn and joining the components together.

However, in the conventional radiator, as shown in FIG. 3, the brazing material 59 is coated not only on the bottom surface of the header 55 but also on the inner surface of the tab 57, and the side inserted into the tab 57. The brazing material 91 is also coated on the inner surface of the end of the support 9 so that both surfaces of the inner surface of the tab 57 and the end of the side support 9 are joined to each other. Therefore, since the thermal expansion coefficient of the tube 71 and the thermal expansion coefficient of the side support 9 are different, when the length difference by the thermal expansion of the tube 71 and the side support 9 arises, the tube 71 will be torn and damaged, and this tube There was a problem that the coolant leaked through the damaged portion of the 71. In consideration of the difference in thermal expansion coefficient between the tube 71 and the side support 9, a so-called saw cut 92 process is formed at both ends of the side support 9 after the brazing process. In addition, there is also a problem that the productivity for the radiator manufacturing process is lowered by further performing.

The present invention has been devised in view of the above-described conventional problems, and has a non-bonded coupling structure between the header and the side support of the radiator which can prevent the tube damage and the coolant leakage due to the difference between the tube and the side support and thermal expansion. For the purpose of providing

1 is a schematic plan view showing a cross-sectional view of a part of the radiator made by a non-joint coupling structure of the header and the side support according to the present invention.

2 is a perspective view showing the structure of a general radiator.

3 is a schematic plan view showing a cross-section of a part of a radiator formed by a non-joint coupling structure of a conventional header and a side support.

<Explanation of symbols for the main parts of the drawings>

1: upper tank part, 2: lower tank part,

3: radiator core, 4: side support,

11.21: header, 12, 22: upper tank,

15: tap, 31: tube,

32: heat sink fin, 41: brazing material,

42: bend

In order to achieve the above object, the present invention constitutes an upper tank portion and a lower tank portion, and both the header and the radiator core which is installed between the upper tank portion and the lower tank portion, the tabs are bent outwardly at both ends, respectively. An unbonded coupling structure between the header of the radiator and the side support for coupling the side supports supporting each other to each other, wherein both ends or one end of the side support are bent in opposite directions to the bending direction of the tab and inserted into the tab to be coupled to each other. A curved portion is formed.

According to the present invention, the bottom surface of the header is coated with brazing material only on the portion except the tab, and the bent portion of the side support inserted into the tab when brazing is not covered with the brazing material on the outer peripheral surface of the bent portion of the side support inserted into the tab. Not bonded.

According to the non-joined coupling structure between the header and the side support of the radiator of the present invention configured as described above, the inner surface of the tab is not covered with a brazing material, and correspondingly inserted into the insertion space of the tab to contact the inner surface of the tab. Since the brazing material is not coated on the outer circumferential surface of the bent portion of the side support, the bent portion between the tab and the side support inserted into the insertion space of the tab is maintained without being bonded to each other even when brazing. Therefore, even if a thermal expansion length difference between the tube of the radiator core and the side support occurs, the bent portion of the side support inserted into the tab serves as a buffer to prevent damage to the tube.

Other features and advantages of the present invention will become more apparent from the following description based on the accompanying drawings.

As shown in FIG. 1, reference numeral 1 denotes an upper tank part 1 constituting a radiator, in which a plurality of through holes (not shown) are formed along a longitudinal direction, and tabs 15 are formed at the centers of both ends thereof, respectively. It comprises a header 11 and the upper tank 12 is joined to the header 11 to form a cooling water passage therein. The upper tank portion 1 is provided with a radiator cap 13, cooling water inlet pipe 14 and the like.

In addition, reference numeral 2 is a lower tank part, and a plurality of through holes (not shown) are formed along the longitudinal direction, and tabs (not shown here for convenience and refer to only tabs formed in the upper header 11 below) are formed at the centers of both ends. And a lower tank 22 joined to the header 21 to form a cooling water passage therein, and the lower tank portion 2 includes a cooling water outlet pipe 23 and the like. Is installed.

The radiator core 3 is installed between the upper tank part 1 and the lower tank part 3 as described above. The radiator core 3 has a plurality of end portions inserted into the through-holes of the upper header 11 and the through-holes of the lower header 21, respectively, to allow the upper tank portion 1 and the lower tank portion 2 to communicate with each other. The heat dissipation fins 32 are disposed between the tube 31 and the tubes 31 to dissipate the cooling water flowing in the tubes 31.

Then, side supports 4 are provided on both sides of the radiator core 3, respectively.

According to the present invention, the tab 15 is bent upward from the center of both ends of the header 11 to be bent downward again to form an insertion space of the lower and both sides open.

In addition, according to the present invention, the bottom surface of the header 11 is coated with the brazing material 111, but the inner surface of the tab 15 is not coated with the brazing material.

The surface facing the radiator core 3, that is, the inner surface of the side support 4, is covered with a brazing material 41, and each end of the side support 4 is inserted into the insertion space of the tab 15. The end portion of the side support 4 inserted into the insertion space of the tab 15 is bent (ie, bent inwardly) in a direction opposite to the tab 15 in correspondence with the tab 15, so that the tab 15 is formed. It is inserted into the insertion space of. Accordingly, the outer circumferential surface of the bent portion 42 of the side support 4 inserted into the insertion space of the tab 15 is in contact with the inner circumferential surface of the tab 15, but since these two contact surfaces are not covered with a brazing material, The bent portion 42 of the side support 4 inserted in the insertion space is not joined to the tab 15 even when brazing.

Thermal expansion length of the tube 31 and the side support 4 of the radiator core 3 in the process of using a radiator made by the unbonded coupling structure of the radiator header and the side support according to the present invention configured as described above Even if they are different from each other, since the tabs 15 and the bent portions 42 of the side supports 52 are not bonded to each other but separated, the phenomenon in which the tube 31 is torn and damaged can be prevented.

In the non-joined coupling structure of the radiator header and side support according to the present invention configured as described above, the tab 15 and the end of the side support 4 inserted into and coupled to the insertion space of the tab 15 are joined. Of the radiator core 3 to prevent damage such as tearing of the tube 31 even when the length of the thermal expansion of the tube 31 and the side support 4 of the radiator core 3 are different from each other. This is improved. In addition, since the step of forming the saw cut is excluded, the productivity for the radiator can be increased.

Claims (2)

A radiator core provided between the upper tank 1 and the lower tank 2 and between the upper tank part and the lower tank part, and headers 11 and 21 having tabs 15 curved outwardly at both ends thereof, respectively. As a non-joined coupling structure of the radiator header and side support for joining the side supports (4) supporting both sides of (3) to each other, The non-join of the radiator header and side support are formed at both ends and one end of the side support, the inner bent portion 42 being bent inwardly and inserted into and coupled to the tab opposite to the bending direction of the tab. Coupling structure. The bottom surface of the header (11, 21) is coated with a brazing material only in the portions except the tabs 15, the brazing material is not coated on the outer peripheral surface of the bent portion 42 of the side support (4) inserted into the tab Unbonded coupling structure between the radiator header and the side support, characterized in that not.