JPH0630669U - Housingless oil cooler - Google Patents

Abstract

(57) [Summary] [Object] An object of the present invention is to provide an oil cooler capable of preventing deformation of a filter seal surface and arranging a water pipe in a free direction. [Structure] A plurality of plates 3 and 5 are laminated to have an oil passage 7 and a cooling water passage 9 between the plates 3 and 5, and an oil return pipe is inserted into a central through hole 31 at an upper portion of the core portion 1. The upper casing 55 and the lower casing 57 having the through holes 51 and 53 formed therein are joined to each other through the through hole peripheral portions 51a and 53a, and the oil tank chamber 59 is in direct communication with the oil passage 7. A cooling water tank chamber 61 is formed which is partitioned into a chamber 61a and an outlet tank chamber 61b, and a water pipe 6 is provided in both tank chambers 61a and 61b.
5, 67 are inserted, and communication pipes 69, 71 for connecting the cooling water passage 9 and both tank chambers 61a, 61b are provided in the oil tank chamber 59.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a housingless oil cooler formed by stacking a plurality of plates.

[0002]

[Prior art]

 As a housingless oil cooler (hereinafter referred to as "oil cooler") formed by laminating a plurality of plates, one disclosed in, for example, Japanese Patent Application Laid-Open No. 4-87726 is conventionally known.

FIG. 4 and FIG. 5 show the oil cooler disclosed in the above publication, in which 1 is a stack of a plurality of first plates 3 and second plates 5 made of aluminium, alternately between the plates 3 and 5. An oil passage 15 and an inlet tank 17 and an outlet tank 19 for the cooling water W are provided in the upper part of the core portion provided with an oil passage 7 and a cooling water passage 9 by an upper casing 11 and a lower casing 13 made of aluminum. Has been.

The oil passage 7 is opened in the oil tank 15 through one oil passage hole 21 provided in the lower casing 13, and the cooling water passage of the core portion 1 is provided in the inlet tank 17 and the outlet tank 19. 9 are respectively opened, and water pipes 23 and 25 for introducing the cooling water W into and out of the core portion 1 are inserted into each of the inlet tank 17 and the outlet tank 19.

On the other hand, in the through holes 27, 29, 31 in the center of the upper casing 11 and the lower casing 13 and in the center of the core part, an oil return made of a hollow stud bolt fixed to a bracket (not shown) of the engine. The oil O, which is inserted into the pipe 33 and flows into the core portion 1 through the oil inlet hole (not shown) in the lower portion of the core portion, fills the oil passage 7 and then cools the cooling water in the cooling water passage 9. It is heat-exchanged with W and flows into the oil tank 15, then is screwed to the oil return pipe 33, purified by the oil filter 35 arranged on the upper casing 11, and flows out from the oil return pipe 33 to the engine side. It is structured.

In the figure, 37 is a cooling water passage hole provided in each of the first plate 3 and the second plate 5, and the cooling water passage hole 37 is opened in the inlet tank 17 and the outlet tank 19 respectively to cool the The water W is introduced into and drawn out from the cooling water passage 9 of the core portion 1.

[0007]

[Problems to be solved by the device]

 However, in the conventional oil cooler as described above, since the peripheral portion of the through hole 27 provided in the center of the upper casing 11 is a so-called cantilever, when the oil filter 35 is firmly tightened when the oil filter 35 is attached, The oil filter sealing surface 39 on the upper part of the casing 11 may be deformed, causing oil leakage.

Further, in the oil cooler, even if it is necessary to change the mounting positions of the water pipes 23 and 25 due to the layout with other devices, structurally, these can be arranged in any direction. There wasn't.

That is, when the water pipes 23 and 25 are arranged in free directions, the positions of the inlet tank 17 and the outlet tank 19 have to be changed accordingly, but the positions of the inlet tank 17 and the outlet tank 19 must be changed. When the position is changed, it is necessary to change the position of the cooling water passage hole 37 opening to each tank 17, 19 accordingly.

However, if the cooling water passage holes 37 are provided close to each other, the cooling water W bypasses and flows into the short side in the cooling water passage 9, so that the heat exchange between the oil O and the cooling water W is improved. It will not be done.

Therefore, it is necessary to make the cooling water passage holes 37 face each other with an interval of 180 ° and to make the flow of the cooling water W in the cooling water passage 9 counterflow. As described above, when the cooling water passage holes 37 are provided in the first plate 3 and the second plate 5, the cooling water passage holes 37 must be opposed to each other with an interval of 180 °. Therefore, in the oil cooler having the above structure, it is difficult to arrange the water pipes 23 and 25 in the free direction.

The present invention has been devised in view of the above circumstances, and prevents deformation of the oil filter sealing surface due to excessive tightening at the time of installing the oil filter and allows the water pipe to be arranged in a free direction. The purpose is to provide a possible oil cooler.

[0013]

[Means for Solving the Problems]

 In order to achieve such an object, the present invention has a structure in which a plurality of plates having a through hole formed in the center are alternately stacked and an oil passage and a cooling water passage are alternately formed between these plates, In an oil cooler having a core part in which an oil return pipe for returning oil from the filter to the engine side is inserted in the through hole, both of the upper casing and the lower casing having a through hole through which the oil return pipe is inserted are formed. An oil tank chamber, which is directly connected to the oil passage, is connected to the upper part of the core by joining the peripheral portions of the through holes to each other, and cooling is divided into an inlet tank chamber and an outlet tank chamber by two partition plates. In addition to partitioning the water tank chamber, water pipes were inserted into the inlet and outlet tank chambers, respectively, and communication pipes were provided in the oil tank chamber to connect the cooling water passages of the core and the inlet and outlet tank chambers, respectively. Than it is.

[0014]

[Action]

 According to the present invention, the peripheral portion of the through hole provided in the center of the upper casing is joined to the peripheral portion of the through hole of the lower casing, and the partition plate is formed in the cooling water tank chamber formed by the upper casing and the lower casing. Since the above is provided, the lower casing and the partition plate prevent the peripheral portion of the through hole of the upper casing from being deformed against excessive tightening of the oil filter.

Then, the cooling water flowing from the water pipe into the inlet tank chamber fills the cooling water passage of the core portion through the communication pipe and is then heat-exchanged with the oil in the oil passage to pass through the other communication pipe. Out from the water pipe on the outlet tank chamber side. On the other hand, the oil that has flowed into the oil passage in the core section fills the oil passage, then undergoes heat exchange with the cooling water in the cooling water passage, flows out from the oil tank chamber to the oil filter, and is purified by the oil filter. It will return from the oil return pipe to the engine side.

[0016]

【Example】

 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The same parts as those of the conventional example shown in FIGS. 4 and 5 are designated by the same reference numerals, and their structural description will be omitted.

FIG. 1 is a plan view of an oil cooler according to an embodiment of the present invention, FIG. 2 is a sectional view taken along line II-II of FIG. 1, and FIG. 3 is a sectional view taken along line III-III of FIG. , 41 are circular upper plates attached to the upper surface of the core part 1, and the upper plate 41 has a through hole 43 provided coaxially with the through hole 31 of the core part 1 at an interval of 90 °. Is formed to form four through holes, and the two opposite through holes are cooling water passage holes 45 communicating with the cooling water passage holes 37 of the first and second plates 3 and 5, and The other opposing through hole is an oil passage hole 49 communicating with one of the two oil passage holes 47 provided in the first and second plates 3 and 5, and the other oil passage hole of the first plate 3 is provided. The structure 47 is closed by the upper plate 41.

Then, both through-hole peripheral portions 51a of a cylindrical upper casing 55 having through holes 51, 53 through which the oil return pipe 33 is inserted and an inverted bowl-shaped lower casing 57 are formed on the upper plate 41. , 53a are joined to each other, and an oil tank chamber 59 in which the cooling water passage hole 45 and the oil passage hole 49 are opened and an annular cooling water tank chamber 61 are formed in the upper portion of the core portion 1. Is formed on the outside of. Then, as shown in FIG. 1, the inside of the cooling water tank chamber 61 is partitioned by two partition plates 63 into an inlet tank chamber 61a and an outlet tank chamber 61b, and water tank pipes are provided in the respective tank chambers 61a and 61b. 65 and 67 are inserted.

Further, communication pipes 69 and 71, one ends of which pass through the oil tank chamber 59 and open to the inlet / outlet tank chambers 61 a and 61 b, are inserted and attached to the cooling water passage holes 45 of the upper plate 41. As shown in FIG. 2, the cooling water W introduced from the one water pipe 65 into the inlet tank chamber 61a flows into the cooling water passage 9 of the core portion 1 through the communication pipe 69, and then the communication is performed. The water is led out from the water pipe 67 from the pipe 71 through the outlet tank chamber 61b.

Further, in FIG. 3, reference numeral 73 is a collar inserted into the through hole 31 in the center of the core portion, and the sheet member 75 is fitted to the upper end projecting from the core portion 1, and the oil return pipe 33. When the nut 77 is screwed into the screw portion 33a formed on the upper part of the engine, the seat member 75 functions as a receiving member for the nut 77 when the core portion 1 is fixed to the bracket of the engine.

A lower plate 79 made of aluminum, a reinforcing plate 81, and a mounting plate 83 are sequentially arranged under the core portion 1, and a through hole 85 is formed in the center of each plate 79, 81, 83. It is formed coaxially with the through hole 31.

Further, on the side of these through holes 85, an oil inflow hole 87 that opens to one of the two oil passage holes 47 provided in the second plate 5 is formed, as shown in FIG. In addition, the oil O flowing into the core portion 1 through the oil inflow hole 87 is heat-exchanged with the cooling water W as it passes through the oil passage 7, and then flows out from the oil passage hole 49 into the oil tank chamber 59. After that, the oil is purified by the oil filter 35 arranged on the upper part of the upper casing 55 and returned to the engine side from the oil return pipe 33.

The other oil passage hole 47 and the cooling water passage hole 37 of the second plate 5 are closed by a lower plate 79, and a packing 89 is attached to the lower portion of the mounting plate 83.

Thus, in the oil cooler according to the present embodiment, as in the conventional case, after non-corrosive flux is applied to each component in advance, the first plate 3 and the second plate 5 are alternately laminated, After forming the core part 1 by inserting the collar 73 into the through hole 31 at the center of both plates 3 and 5, the upper plate 41, the upper casing 55, the lower casing 57, and the water pipes 65, 67 and the lower plate 79. Etc. are attached, these are heated in a furnace, and each part is brazed.

Since the oil cooler according to the present embodiment is configured in this way, in order to fix the oil cooler to the engine bracket, as described above, the oil return pipe 33 is inserted through the collar 73. This may be tightened with the nut 77. Then, the oil filter 35 may be arranged above the upper casing 55, but even if the oil filter 35 is firmly tightened at the time of mounting, in this embodiment, the through hole 51 of the through hole 51 provided at the center of the upper casing 55 is provided. The through hole peripheral portion 53a of the lower casing 57 is joined to the peripheral portion 51a, and the partition plate 63 is provided in the cooling water tank chamber 61 formed by the upper casing 55 and the lower casing 57. The deformation of the peripheral edge portion 51 a of the through hole 51 is prevented by the lower casing 57 and the partition plate 63 against excessive tightening of the through hole 35.

Then, as shown in FIG. 2, after the cooling water W introduced from the one water pipe 65 into the inlet tank chamber 61 a flows into the cooling water passage 9 of the core portion 1 through the communication pipe 69. From the communication pipe 71, the water flows out from the other water pipe 67 through the outlet tank chamber 61b.

On the other hand, as shown in FIG. 3, the oil O flows into the core portion 1 through the oil inflow hole 87 in the lower portion of the core portion 1, and then passes through the oil passage holes 47 to pass through the oil passage 7. After being filled, it is heat-exchanged with the cooling water W in the cooling water passage 9 to flow out from the oil passage hole 49 into the oil tank chamber 59, and is then purified by the oil filter 35 arranged above the upper casing 55. Then, the oil returns from the oil return pipe 33 to the engine side.

As described above, in this embodiment, the peripheral edge portion 51a of the through hole 51 provided at the center of the upper casing 55 is joined to the peripheral edge portion 53a of the through hole of the lower casing 57, and the upper casing 55 and the lower casing 57 are joined together. Since the partition plate 63 is provided in the cooling water tank chamber 61 that is molded by the above, the lower casing 57 and the partition plate 63 prevent the peripheral portion 51a of the through hole 51 from being deformed against excessive tightening of the oil filter 35. However, the problem of deformation of the oil filter sealing surface due to excessive tightening at the time of mounting the oil filter 77 as in the past has been solved.

Further, as shown in FIG. 5, in the conventional oil cooler of this type, the upper portion of the core portion 1 is almost the oil tank 15, but in the present embodiment, the upper portion of the core portion 1 is for cooling water. Since the tank chamber 61 is formed and the partition plate 63 divides the mounting cooling water tank chamber 61 into the inlet tank chamber 61a and the outlet tank chamber 61b, according to the present embodiment, the first plate 3 and the second Even if the cooling water passage holes 37 are provided in the plate 5 so as to face each other, as shown in FIG. 1, the water pipe 65 on the inlet tank chamber 61a side extends over a range α from a position corresponding to the inlet tank chamber 61a, or As long as the water pipe 67 on the outlet tank chamber 61b side is at a position corresponding to the outlet tank chamber 61b, it is possible to arrange these in any direction over the range β.

Further, according to the present embodiment, the oil O 2 flowing out from the oil passage 7 of the core portion 1 can be smoothly guided to the oil filter 35 side by the communication pipes 69 and 71, so that it can be compared with the conventional case. However, oil pressure loss can be reduced.

Furthermore, in the present embodiment, since the mounting portion of the oil filter 35, that is, the upper side of the upper casing 55 is the cooling water tank chamber 61, deterioration of the filter O-ring (not shown) due to heat is caused. Has an advantage that can be prevented.

[0032]

[Effect of device]

 As described above, according to the present invention, it is possible to prevent deformation of the oil filter seal surface due to excessive tightening when installing the oil filter, and it is possible to arrange the water pipe in any direction.

In addition, according to the present invention, the oil pressure loss can be made smaller than in the conventional case, and the oil filter mounting portion becomes a water tank, so that the deterioration of the filter O-ring due to heat can be prevented. .

[Brief description of drawings]

FIG. 1 is a plan view of an oil cooler according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along line II-II in FIG.

3 is a sectional view taken along line III-III in FIG.

FIG. 4 is a plan view of a conventional oil cooler.

5 is a sectional view taken along line VV of FIG.

[Explanation of symbols]

 1 Core Part 3 First Plate 5 Second Plate 7 Oil Passage 9 Cooling Water Passage 31, 43 Through Hole 33 Oil Return Pipe 35 Oil Filter 41 Upper Plate 45 Cooling Water Passage Hole 49 Oil Passage Hole 55 Upper Casing 57 Lower Casing 59 Oil Tank chamber 61 Cooling water tank chamber 61a Inlet tank chamber 61b Outlet tank chamber 63 Partition plate 65,67 Water pipe 69,71 Communication pipe O Oil W Cooling water

Claims (1)

[Scope of utility model registration request] 1. A plurality of plates (3, 5) having a through hole (31) formed in the center thereof are alternately laminated, and an oil passage (7) and a cooling water passage are provided between these plates (3, 5). Oil return pipes (33) that alternately form (9) and recirculate the oil from the oil filter (35) to the engine side.
In a housingless oil cooler having a core portion (1) inserted through the through hole (31), an upper casing (55) having through holes (51, 53) through which an oil return pipe (33) is inserted is formed. ) And the peripheries (51a, 53a) of the through holes of the lower casing (57) are joined to each other, and an oil tank chamber (59) directly communicating with the oil passage (7) is provided above the core portion (1). ) And two partition plates (6
In 3), the inlet tank chamber (61a) and the outlet tank chamber (61
In the oil tank chamber (59), a cooling water tank chamber (61) partitioned by (b) is partitioned and formed, and water pipes (65, 67) are inserted into the inlet / outlet tank chambers (61a, 61b), respectively. A housingless oil cooler, characterized in that a communication pipe (69, 71) for communicating the cooling water passage (9) of the core portion (1) with the inlet / outlet tank chamber (61a, 61b) is provided in the.