KR20020057008A - Aluminum radiator - Google Patents

Abstract

PURPOSE: An aluminum radiator is provided to simplify manufacturing process thereof. CONSTITUTION: A radiator includes a filler neck mount(22a) concavely formed on an upper part of a radiator tank(22) and having a filler neck insertion hole(22b) penetrating a center thereof; and a filler neck(50) made of synthetic resin, formed by injection and comprising a main body(51), a joining part(52) extended from a lower part of the main body with a diameter smaller than the main body and having a screw part(52a) formed on a periphery thereof, a cap(53) joined to an opening on an upper side of the main body to be capable of opening and closing and an overflow pipe(54) formed integrally with the main body and joined to the filler neck insertion hole with an O-ring(24) interposed to prevent leakage of coolant.

Description

Aluminum radiator {ALUMINUM RADIATOR}

The present invention relates to an aluminum radiator, and more particularly, to an aluminum radiator that improves the filler neck while maximizing the advantages of the aluminum radiator tank, simplifies the manufacturing process and makes maintenance work a reality.

In general, in a vehicle equipped with an internal combustion engine, heat generated when the engine is running is conducted to a cylinder head, a piston, a valve, and the like. When the temperature of these parts becomes excessively high, the strength of the parts decreases due to thermal expansion or deterioration. Engine life is shortened, combustion is also worsened, 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. Done.

Therefore, in order to cool the engine, an automobile is usually provided with a water cooling chiller.

The water-cooled cooling device is to lower the temperature of the engine by circulating the coolant through the cylinder block and the cylinder head by a water pump, and is provided with a radiator, a cooling fan, and a water temperature controller for radiating the coolant.

On the other hand, the radiator is a device for dissipating and cooling the cooling water whose temperature rises while passing through the engine, the upper and lower tank assembly and the radiator core as a basic configuration.

The radiator core is composed of a tube through which the coolant flows and a radiating fin disposed between the tubes to radiate the coolant flowing through the tube. The upper and lower tank assemblies include a header and a header to which the tubes of the radiator core are coupled. It is composed of a tank to form a flow path wrapped.

Usually the radiator core and header are made of aluminum and the tank is made of synthetic resin.

In addition, the header and the tank are coupled by a mechanical coupling method, which will be briefly described. The two members are joined by bending a plurality of tab portions formed at predetermined intervals at the edge of the header to wrap the edge of the tank.

However, the radiator equipped with the plastic tank described so far has the following problems.

First, it is difficult to recycle: The materials of component parts, such as aluminum, which forms the core, rubber, which is the material of the gasket, and plastic, which forms the tank, are different.

Aluminum, which is the material of the core and the header, is a highly recycled material, but it cannot be recycled when combined with the plastic tank, so the tank must be separated to recycle the radiator, thus increasing the pretreatment work for recycling.

Second, the assembly process of the tank assembly is complicated and expensive: in order to assemble the header and the tank, a process of caulking the tab part of the header to surround and secure the tank, and a process of combining a gasket for preventing leakage of cooling water, etc. In particular, since the size of the radiator is different for each vehicle type, the productivity of the radiator is lowered because a separate process must be performed every time the radiator is manufactured for the vehicle type.

Third, the coupling structure of the header and the tank is very weak: the tab part of the header prevents the leakage of cooling water by pressing the resin tank, but the tap part is opened when the pressure inside the radiator increases. In addition, interference between the cooling water inlet / outlet, the vehicle body mounting pin, and the like, which are necessarily formed in the plastic tank, may occur due to the interference between the tab portion and the portion that is not caulked, compared to the other portions.

Fourth, plastic tank cracking: The tank is brittle due to its material characteristics, so its strength is excellent, but it is not deformed, and the cracking occurs.This cracking phenomenon is caused by the pressure of the tank when the tab part is caulked and the vibration of the body. In the case of injection molding, the weakness may occur due to the characteristics of the material or the injection conditions, and there is no way to inspect the weakness, and the cracking of the radiator causes the coolant leakage and seriously affects the engine cooling. .

Fifth, the difficulty of common use and the increase of maintenance cost: The tanks are changed in position or shape of various accessories (pressure cap, inlet / outlet pipe, body mounting pin) according to the structure of the body, and these structures are injection molded together with the tank. In order to produce tanks suitable for each type of vehicle, molds of tanks for each type of vehicle are required, which leads to an increase in manufacturing costs. Also, administrative costs such as difficulty in managing products / molds and A / S in discontinuation of models are also raised.

In order to solve the problem of a radiator having a synthetic resin tank as described above, an aluminum radiator having a header and a tank made of the same material of aluminum has been manufactured.

Referring to the structure of the aluminum radiator schematically, Figure 1 is a perspective view of the aluminum radiator according to the prior art, Figure 2 is an exploded perspective view of the filler neck according to the prior art.

As shown in FIG. 1 and FIG. 2, the aluminum radiator 10 has a top and bottom tank assembly 20 and a radiator core 30 as a basic configuration.

The radiator core 30 is disposed between the tube 31 through which the coolant flows and the heat dissipation fin 32 for dissipating high heat of the coolant flowing through the tube 31 through the tube 31. It is composed of

The upper and lower tank assemblies 20 include a header 21 into which the upper and lower ends of the tube 31 are inserted, a tank 22 coupled to the header 21 to form a cooling water flow path therebetween, and the header 21 and the header 21. End cap 23 is coupled to the left and right openings of the tank 22 assembly, each part 21, 22, 23 is made of aluminum.

On the other hand, the upper side of the upper tank 22 serves as a passage function of replenishment / replacement of the coolant, and a filler neck for guiding the coolant to move to the reservoir tank to reduce the pressure when the pressure inside the radiator is excessively increased. 40 is installed, and the filler neck 40 opens and closes the filler neck main body 41 and the upper opening of the filler neck main body 41 which are fitted and brazed on the upper surface of the tank 22, as shown in FIG. On the other hand, the pressure valve (not shown) is composed of a cap 42 and the overflow pipe 43 is coupled to the filler neck body 41 and connected to the reservoir tank.

That is, when the internal pressure of the radiator 10 becomes excessively high, the overflow pipe 43 is opened by the pressure valve inside the cap 41 so that the coolant returns to the reservoir tank to maintain the pressure inside the radiator 10. .

However, according to the aluminum radiator according to the prior art has the following problems.

In the case of a radiator tank made of synthetic resin, the tank body and various attachments (coolant inlet and outlet pipes, filler necks, etc.) are formed by the injection process, and the deformation of the filler neck 40 is small in the aluminum tank. Since the filler neck body 41 and the overflow pipe 43 may be separately processed after brazing, they may be brazed. Therefore, the components of the filler neck 40 may be manufactured and combined. Etc. The manufacturing process increases.

In addition, the filler neck main body 41 is easily deformed by the external force due to the characteristics of aluminum, so that the cap 42 may not be separated or combined from the main body 41.

In addition, there is a problem such that the coolant leaks through the coupling portion of the pillar neck body 41 and the overflow pipe 43.

Accordingly, the present invention has been invented to solve the above problems, it is an object of the present invention to provide an aluminum radiator to simplify the manufacturing process of the radiator while maximizing the advantages of the aluminum tank.

Another object of the present invention is to prevent the filler neck from being deformed by an external force.

In addition, another object of the present invention is to prevent the coolant from leaking through the coupling portion of the pillarneck body and the overflow pipe.

1 is a perspective view showing a typical aluminum radiator.

Figure 2 is an exploded perspective view of the filler neck according to the prior art.

Figure 3 is a longitudinal cross-sectional view of the filler neck coupling structure of the aluminum radiator according to the present invention.

Figure 4 is a longitudinal sectional view showing another embodiment of the filler neck coupling structure of the aluminum radiator according to the present invention.

Figure 5 is another illustration of the filler neck coupling structure of the aluminum radiator according to the present invention.

Figure 6a is another illustration of the filler neck coupling structure of the aluminum radiator according to the present invention.

6B is an exploded perspective view of FIG. 6A.

Figure 7 is another illustration showing the filler neck coupling structure of the aluminum radiator according to the present invention

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

22 tank 22a pillar neck seat

22c: pillar neck coupling part 22d: threaded part

24: O-ring 50: filler neck

51: body portion 52: coupling portion

52a: thread 53: cap

54: overflow pipe 55: latch groove

56: tension portion 56a: locking jaw

60: adapter 64: latch

Aluminum radiator according to the present invention for achieving the above object, the upper and lower tank assembly consisting of a header and a tank made of aluminum; A tube connecting the tank assemblies and a coolant to flow therein; A heat dissipation fin installed between the tubes; Filler neck insertion portion formed in the tank of the tank assembly; The filler neck is detachably coupled to the insert portion, characterized in that it comprises a filler neck which is injection molded using a synthetic resin material.

In addition, the aluminum radiator according to the present invention, the upper and lower tank assembly consisting of a header and a tank made of aluminum; A tube for connecting the tank assemblies and a cooling water to flow therein; A heat dissipation fin installed between the tubes; Filler neck insertion portion formed on the upper surface of the tank of the tank assembly; An adapter coupled to the pillarneck insert and provided with a screw on an inner surface thereof; It characterized in that it comprises a filler neck of a synthetic resin material screwed to the threaded portion of the adapter.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

<Example 1>

Figure 3 is a longitudinal sectional view showing an embodiment according to the present invention.

As shown in the figure, in the aluminum radiator according to the present invention, the filler neck seating portion 22a is formed in the upper surface of the radiator tank 22, and the filler neck insertion hole 22b is formed at the center of the seating portion 22a. The filler neck insertion hole 22b is screwed with a filler neck 50 which is injection molded using a synthetic resin as a material.

An o-ring 24 is installed between the bottom of the filler neck 50 and the filler neck seating portion 22a to prevent leakage of cooling water.

The injection molding filler neck 50 has a body portion 51 and a coupling portion 52 formed at a lower portion of the body portion 51 and having a smaller diameter than the body portion 51 and having a screw portion 52a formed on an outer circumferential surface thereof. And a cap 53 coupled to the upper opening of the main body 51 so as to be openable and close, and an overflow pipe 54 integrally formed with the main body 51.

<Example 2>

4 is a longitudinal cross-sectional view showing a second embodiment according to the present invention, wherein a tubular filler neck engaging portion 22c is formed by burring so that the inlet portion is stepped on the upper surface of the tank 22, and the engaging portion 22c is formed. A screw portion 22d is formed in the screw portion, and the filler neck 50 applied in the first embodiment is screwed into the screw portion 22d.

<Example 3>

The fifth embodiment is a longitudinal cross-sectional view showing a third embodiment according to the present invention, the third embodiment is to prepare a very difficult to form a screw thread because the tank 22 is made of aluminum and its thickness is very thin, Drill the insertion hole 22e in the tank 22, and braze the adapter 60 having the threaded portion 61 therein to the insertion hole 22e, and attach the filler neck 50 to the adapter 60. Tighten the screws.

The adapter 60 is an insertion portion 62 having an outer diameter equal to the diameter of the insertion hole 22e as a whole, and an expansion portion 63 extending from the upper end of the insertion portion 62 and seated on the upper surface of the tank 22. It is composed.

<Example 4>

6A and 6B are longitudinal cross-sectional views and exploded perspective views showing a fourth embodiment according to the present invention, wherein an upper surface of the adapter 60 has a latch 64 inclined in one direction (a fastening direction of a filler neck), and a pillar A latch groove 55 having the same shape as the latch 64 is formed in the bottom of the neck 50. When the filler neck 50 is turned in the fastening direction, the bottom of the filler neck 50 is inclined ( 64a) is naturally screwed to the adapter 60, and when the filler neck 50 is fully screwed, the filler net 50 is not rotated by the vertical portion 64b of the latch 64 in the unwinding direction. .

Example 5

7 is a longitudinal sectional view showing a fifth embodiment according to the present invention.

As shown in the drawing, a plurality of tension portions 56 are formed at the lower portion of the coupling portion 22c of the filler neck 50 and extend downwardly at predetermined intervals in the circumferential direction, and outwardly at the lower portion of the tension portion 56. The locking step 56a is formed.

That is, when the filler neck 50 is fastened, the tension part 56 is elastically gathered so that the filler neck 50 is naturally screwed into the coupling part 22c, and when the filler neck 50 is completely fastened, the tension part 56. ), The outward locking jaw 56a is caught by the lower end of the tank 22 coupling portion 22c while being opened by its elastic force, and thus, the filler neck 50 is not loosened.

Therefore, since the filler neck 50 is manufactured in one operation by the injection process, there is no process of separately manufacturing and assembling the filler neck body and the overflow pipe as in the prior art.

The synthetic resin, which is the material of the filler neck 50, has superior rigidity to aluminum due to the characteristics of the material, so that the filler neck does not deform as in the prior art even when external force is applied.

In addition, since the pillarneck main body 51 and the overflow pipe 54 are single, no gap is generated between them, so that the coolant does not leak through the pillarneck main body and the overflow pipe as in the prior art.

In addition, in Examples 1, 2 and 3, since the filler neck 50 can be separated from the tank 22, the entire radiator is not replaced when the filler neck breaks down.

As described above, by the aluminum radiator of the present invention, since the filler neck of the synthetic resin is applied to the aluminum tank, the production of the filler neck can be simplified, thereby increasing productivity.

In addition, since the filler neck is not easily deformed by an external force due to the nature of the material of the filler neck, a defect phenomenon in which the cap cannot be separated or combined is eliminated.

In addition, since the coolant does not leak through the filler neck, there is a remarkable effect of improving the reliability of the product.

Claims (4)

Upper and lower tank assemblies comprising an aluminum header and a tank; A tube connecting the tank assemblies and a coolant to flow therein; In the aluminum radiator comprising a heat radiation fin installed between the tube, The aluminum radiator, Filler neck insertion portion formed in the tank of the tank assembly; And a filler neck detachably coupled to the filler neck inserting portion, the filler neck being injection molded using a synthetic resin material. The method of claim 1, wherein the filler neck, Sliding along the inner surface of the filler neck insert portion, the outward engaging jaw of the lower end of the aluminum radiator further comprises a tension portion that is elastically fastened to the lower end of the filler neck insert. Upper and lower tank assemblies comprising an aluminum header and a tank; A tube connecting the tank assemblies and a coolant to flow therein; In the aluminum radiator comprising a heat radiation fin installed between the tube, The aluminum radiator, Filler neck insertion portion formed on the upper surface of the tank of the tank assembly; An adapter coupled to the pillarneck insert and provided with a screw on an inner surface thereof; Aluminum radiator characterized in that it comprises a filler neck of a synthetic resin material screwed to the threaded portion of the adapter. The method of claim 3, wherein the aluminum radiator, A latch formed on the tank upper surface of the tank assembly to be inclined in the fastening direction of the filler neck; And a latch groove formed on a bottom surface of the filler neck and including a latch groove into which the latch is inserted.