JP3057163U - Oil cooler - Google Patents

Abstract

(57) [Problem] To provide an oil cooler which has a simple structure and is easy to install in a flexible cooling water circulation hose which connects between an engine and a radiator. SOLUTION: An inner pipe 3 and an outer pipe 4 are coaxially arranged, and one of the pipes is expanded or contracted and joined to the other pipe in a liquid-tight manner. Connect the short pipe part 5 for connection. Then, both ends of the other pipe are extended longer in the axial direction than the one pipe, and the hose 1 is connected to the extension.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to an oil cooler provided inside a flexible cooling water circulation hose that connects between an engine and a radiator.

[0002]

[Prior art]

 In this type of conventional oil cooler, as shown in FIG. 3, an oil cooler main body 2 is provided inside a mounting pipe 10, and a short pipe section 5 as an oil inlet / outlet pipe penetrates the mounting pipe 10, and the penetrating part is a liquid. It was tightly fixed. Then, both ends in the longitudinal direction of the mounting pipe 10 were reduced, and the mounting portion of the hose 1 was formed there.

[0003]

[Problems to be solved by the invention]

 This type of conventional oil cooler requires a mounting pipe 10 in addition to the oil cooler main body 2, and the short pipe section 5 protruding from the oil cooler main body 2 penetrates through the mounting pipe 10 in a liquid-tight manner. However, there is a disadvantage that the structure is complicated and the production is troublesome. Accordingly, an object of the present invention is to provide an oil cooler that has a simple structure and is easy to attach to a hose for circulating cooling water.

[0004]

[Means for Solving the Problems]

 The present invention according to claim 1 is an oil cooler to be installed in a flexible cooling water circulation hose 1 connecting between an engine and a radiator, wherein the oil cooler body 2 is coaxially arranged. It has a pipe 3 and an outer pipe 4, one of which is the end of the outer pipe 4 or both ends of the inner pipe 3, which is contracted or expanded and joined to the other pipe in a liquid-tight manner. A short pipe portion 5 for connecting an oil pipe is connected to an outer surface of the pipe 4, and both ends of the other pipe are extended longer than both ends of one pipe in the axial direction, and the hose 1 is connected to the extension. An oil cooler configured to be connected.

According to a second aspect of the present invention, in the first aspect, both ends of the outer tube 4 are reduced and joined to the outer surface of the inner tube 3 in a liquid-tight manner, and both ends of the inner tube 3 are connected to the outer tube. 4 is an oil cooler that is longer than both ends of the hose 1 in the axial direction and the inner pipe 3 has a diameter substantially equal to the diameter of the hose 1. According to a third aspect of the present invention, in the first aspect, both ends of the inner tube 3 are expanded and joined to the inner surface of the outer tube 4 in a liquid-tight manner. The oil cooler extends axially outward from both ends and has a diameter of the outer tube 4 substantially equal to a diameter of the hose 1.

[0006]

[Embodiment of the invention]

 Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a partially cutaway front view of the oil cooler of the present invention. This oil cooler has both ends connected to a flexible cooling water circulation hose 1 that connects between the engine and the radiator. The oil cooler is of a so-called concentric type, in which the inner tube 3 and the outer tube 4 are arranged coaxially, and the length of the inner tube 3 is longer than the outer tube 4. Then, both ends of the outer tube 4 are reduced, and the portions are joined to the inner tube 3 in a liquid-tight manner. An inner fin 9 is arranged between the inner tube 3 and the outer tube 4, and a pair of short tube portions 5 are connected to outer peripheries of both ends of the outer tube 4. The outer peripheral surface of the inner tube 3 and the inner peripheral surface of the outer tube 4 are coated with a brazing material in advance. The through-hole of the short tube portion 5 on the outer periphery of the outer tube 4 is slightly bar-linked outward. At the base of the short tube portion 5, a bulging portion for a stopper is slightly formed.

Further, extension tubes 8 are fitted into both ends of the inner tube 3. The end of the extension tube 8 is slightly formed with a bulging portion for preventing the hose from coming off. The oil cooler thus assembled is inserted into a high-temperature furnace, melts the pre-coated brazing material, and then cools and solidifies the same, thereby providing a liquid-tight and integrated connection between the contact parts of the components. Braze and fix to complete the oil cooler. Flexible hoses 1 for circulating cooling water for connecting between the engine and the radiator are connected to the respective extension pipes 8, and the cooling water flows through the inner pipe 3. Then, heat exchange is performed between the cooling water and oil flowing between the inner pipe 3 and the outer pipe 4. Since the inner diameter of the inner tube 3 and the inner diameter of the hose 1 are substantially the same, the cooling water does not cause a large pressure loss in the oil cooler main body 2.

Next, FIG. 2 shows a second embodiment of the present invention, which is different from that of FIG. 1 in that the outer tube 4 is extended and the hose 1 is fitted thereto. is there. Both ends of the inner tube 3 are expanded and joined to the inner surface of the outer tube 4. In this example, since the inner diameter of the inner pipe 3 is smaller than the inner diameter of the hose 1 connected to the outer pipe 4, the flow rate of the cooling water inside the inner pipe 3 is increased, and the cooling water is stirred and heat exchange is performed. Promoted.

[0009]

[Functions and effects of the invention]

 The oil cooler of the present invention is of a so-called concentric type, in which both ends of the other pipe are extended axially outward from both ends of one pipe, and a hose for cooling water circulation is connected thereto. With this configuration, a compact oil cooler with a simple structure and easy installation can be provided.

[Brief description of the drawings]

FIG. 1 is a partially cutaway front view of the oil cooler of the present invention.

FIG. 2 is a longitudinal sectional view of a main part of another embodiment of the oil cooler of the present invention.

FIG. 3 is a front view of a conventional oil cooler.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Hose 2 Oil cooler main body 3 Inner pipe 4 Outer pipe 5 Short pipe part 8 Extension pipe 9 Inner fin 10 Mounting pipe

Claims (3)

[Utility model registration claims] 1. An oil cooler which is installed in a flexible cooling water circulation hose 1 connecting an engine and a radiator, wherein an oil cooler main body 2 has an inner pipe 3 and an outer pipe which are coaxially arranged. 4, both ends of the outer tube 4 or both ends of the inner tube 3, which are one of the tubes, are reduced or expanded and joined to the other tube in a liquid-tight manner. A short pipe portion 5 for connecting an oil pipe is connected, and both ends of the other pipe are extended axially outward from both ends of one pipe so that the hose 1 is connected to the extension. Composed oil cooler. 2. The outer tube 4 according to claim 1, wherein both ends of the outer tube 4 are reduced and joined to the outer surface of the inner tube 3 in a liquid-tight manner. An oil cooler that is elongated and has a diameter of an inner tube 3 substantially equal to a diameter of the hose 1. 3. The inner tube 3 according to claim 1, wherein both ends of the inner tube 3 are expanded and joined to the inner surface of the outer tube 4 in a liquid-tight manner. An oil cooler whose outer tube 4 has a diameter substantially equal to the diameter of the hose 1.