KR200168990Y1 - Oil cooler of the auto mobile - Google Patents

Abstract

An outer pipe having an oil inlet and an oil outlet for oil inflow and outflow; an inner pipe extending longitudinally into the outer pipe and having both ends sealed to both ends of the outer pipe to form a space in which oil flows; In the automotive oil cooler including a heat dissipation fan that is installed on the outer surface of the inner pipe to expand the heat dissipation area, both ends of the outer pipe gradually reduces the diameter, both ends of the inner pipe gradually enlarge the diameter An oil cooler for automobiles, characterized in that the inner peripheral surface of both ends of the pipe and the outer peripheral surface of both ends of the inner pipe are welded to each other.

According to the features of the present invention, by expanding both ends of the inner pipe and welding both ends of the outer pipe to weld each other, welding stress can be distributed, thereby preventing the leakage of the pipe due to vibration of the vehicle body during driving. have.

Description

Oil cooler for automobiles {Oil cooler of the auto mobile}

The present invention relates to an oil cooler for automobiles having an improved coupling structure of internal and external pipes.

Typically, automobiles are equipped with an oil cooler for cooling oil used in an engine or a transmission. This is a device that cools the oil of the transmission in a vehicle equipped with an automatic transmission, which is installed in the lower tank of the radiator and has a pipe-like structure.

1 illustrates an example of a conventional oil cooler 10, and FIG. 2 is a cross-sectional view taken along the line I-I of FIG. 1.

1 and 2, the oil cooler 10 includes an inner pipe 11 and an outer pipe 12 installed outside the inner pipe 11. At this time, both ends of the inner and outer pipes 11 and 12 are joined to each other. Accordingly, a predetermined space portion 13 is formed between the outer circumferential surface of the inner pipe 11 and the inner circumferential surface of the outer pipe 12. The space 13 is an oil flow path through which oil flows and communicates with the outside through an oil inlet 15 and an oil outlet 16 installed on an outer circumferential surface of the outer pipe 11.

Meanwhile, the heat dissipation fins 14 are interposed in the space 13 to surround the outer surface of the inner pipe 11. In addition, a coolant passage 17 is formed in the inner pipe 11 to allow the coolant to flow, and heat exchange is performed between the coolant and the oil flowing in the space 13.

Here, both ends of the inner pipe 11 and the outer pipe 12 are welded and sealed. That is, both ends of the inner pipe 11 are enlarged pipe parts 11a gradually expanding the diameter, and a part of the outer surface of the pipe pipe part 11 a is in contact with the inner surface of the end of the outer pipe 12. Welded to form a space 13 through which oil can flow.

The operation of the conventional oil cooler 10 configured as described above is as follows.

The hot oil flowing through the oil inlet 15 flows through the space 13 formed between the inner pipe 11 and the outer pipe 12, and the cooling water passage part formed inside the inner pipe 11 ( In 17) coolant flows. Therefore, heat exchange is performed between the hot oil and the coolant, thereby cooling the oil. The oil thus cooled is discharged to the outside through the oil outlet 16.

However, the conventional oil cooler 10 forms the expansion pipes 11a at both ends of the inner pipe 11 so as to seal-bond the inner pipe 11 and the outer pipe 12 to the outer pipe 12. Will be welded with. This structure increases the inner diameter at the end of the inner pipe 11 to form the expansion pipe 11a so that stress is concentrated around the expansion pipe 11a. Therefore, oil may leak into the coolant passage when the vehicle is driven due to a crack that may occur in the expansion pipe portion 11a.

The present invention has been made to solve the above problems, and relates to an automotive oil cooler that improves the coupling structure of the inner pipe and the outer pipe.

1 is a perspective view showing a conventional oil cooler,

2 is a cross-sectional view taken along the line II of FIG. 1;

3 is a partially exploded perspective view showing an oil cooler according to the present invention,

Figure 4 is a cross-sectional view showing an oil cooler according to the present invention.

<Brief description of symbols for the main parts of the drawings>

10,30. Oil Cooler 11,31. Inner pipe

11a, 31a. Expansion tube 12,32. Outer pipe

13,33. Space section 14,34. Heat dissipation

15,35. Oil Inlet 16,36. Oil outlet

17,37. Cooling water passage

In order to achieve the above object, the automotive oil cooler of the present invention has an oil inlet and an oil outlet having an oil inlet and an oil outlet formed therein, and a length of the oil pipe is introduced into the inside of the outer pipe and both ends of the outside An automotive oil cooler comprising an inner pipe sealingly bonded to both ends of a pipe to form a space in which oil flows, and a heat dissipation fan installed on an outer surface of the inner pipe to widen a heat dissipation area. Is gradually reduced in diameter, and both ends of the inner pipe are gradually enlarged in diameter to weld the inner peripheral surfaces of both ends of the outer pipe and the outer peripheral surfaces of both ends of the inner pipe to each other.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the automotive oil cooler according to the present invention.

3 is a partially exploded perspective view of the oil cooler 30 according to the present invention, and FIG. 4 is a cross-sectional view showing the oil cooler 30 according to the present invention.

3 and 4, the oil cooler 30 includes an inner pipe 31 and an outer pipe 32 into which the inner pipe 31 extends in the longitudinal direction. In addition, the pipes 31 and 32 are joined to each other between the inner pipe 31 and the outer pipe 32 to form a space 33 that is a flow path of oil. At this time, the space 33 is in communication with the outside through the oil inlet 35 and the oil outlet 36 provided on the outer peripheral surface of the outer pipe (32).

In addition, the space 33 is provided with a heat dissipation fin 34 as a means for increasing the heat dissipation area in contact with the outer circumferential surface of the inner pipe 31. The inner circumferential surface of the inner pipe 31 is formed with a coolant passage 37 through which coolant heat exchanges with oil flowing in the space 33.

Here, both ends of the inner pipe 31 and the outer pipe 32 are sealed by welding each other, the end of the inner pipe 31 gradually expands the diameter to form an expansion pipe 31a. On the contrary, the end of the outer pipe 32 gradually reduces the diameter to form the shaft tube portion 32a. A predetermined portion of the outer circumferential surface of the expansion pipe 31a of the inner pipe 31 and a predetermined portion of the shaft pipe portion 32a of the outer pipe 32 are welded to each other to provide oil between the outer circumferential surface of the inner pipe 31 and the outer pipe 32. The space 34 that can flow is formed.

The action of the oil cooler 30 according to the present invention configured as described above is as follows.

The hot oil flows through the oil inlet 35 of the outer pipe 32 and then flows through the space 33 formed by welding the ends of the inner pipe 31 and the outer pipe 32 to each other. . At this time, heat exchange is performed between the coolant flowing in the coolant passage part 37 formed in the inner pipe 31 and the oil, and thus the oil is cooled. The cooled oil then flows out through the oil outlet 36.

As described above, the automotive oil cooler of the present invention expands both ends of the inner pipe and simultaneously welds both ends of the outer pipe to disperse the welding stress, thereby distributing the welding stress. Oil leakage can be prevented.

Although the present invention has been described with reference to one embodiment shown in the drawings, this is merely exemplary, and it will be understood by those skilled in the art that various modifications and equivalent other embodiments are possible. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

Claims (1)

An inner pipe having an oil inlet and an oil outlet through which oil is introduced and discharged, and an inner pipe which is longitudinally drawn into the inside of the outer pipe, and both ends are hermetically bonded to both ends of the outer pipe to form a space in which oil flows. An automotive oil cooler comprising a pipe and a heat dissipation fan installed on an outer surface of the inner pipe to increase a heat dissipation area, The outer pipe has a shaft pipe portion in which the diameters at both end sides thereof are gradually reduced, and the inner pipe has a expansion pipe portion in which the diameters at both end sides thereof are gradually expanded, and the inner circumferential surface of the shaft pipe portion and the outer circumferential surface of the expansion pipe portion are The oil cooler for automobiles, wherein the oil cooler forms a space in which oil flows between the outer circumferential surface of the inner pipe and the inner circumferential surface of the outer pipe.