JP3203844B2 - Oil cooler device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oil cooler having a structure in which a water-cooled heat exchanger for cooling lubricating oil of an engine and an oil filter are connected.

[0002]

2. Description of the Related Art Foreign matter such as metal powder and carbon powder is mixed in an engine lubricating oil. The foreign matter is removed by an oil filter, and the heated lubricating oil is cooled by an oil cooler. That is, as shown in FIG. 13, the lubricating oil 5 is pressure-fed to the oil pump 55 and circulates between the oil cooler 90, the oil filter 91, the engine 9 and the oil pan 56.

The oil cooler 90 has an air-cooled type and a water-cooled type. The air-cooled oil cooler has a restriction that the cooling effect cannot be sufficiently exhibited unless it is installed in a place where the vehicle receives the wind. On the other hand, as shown in FIG. 14, a water-cooled oil cooler 90 is often installed in an engine block 93 in connection with an oil filter 91 in order to shorten the oil passage and make it compact.

That is, as shown in FIG. 14, a water-cooled oil cooler 90 and an oil filter 91 are mounted on a bracket 92 provided on an engine block 93 by a center bolt 94. Then, the center bolt 94 is inserted through the oil cooler 90 to screw the lower screw 941 into the screw hole 921 of the bracket 92. The flange 943 presses the oil cooler 90, and the oil cooler 9
0 is pressed tightly against the upper plate 922 of the bracket 92.

A recess 911 having a female thread is formed in a central shaft portion below the oil filter 91.
The recess 911 is screwed into the upper screw 942 of the center bolt 94 to be tightly pressed and fixed to the oil cooler 90. In FIG. 14, reference numerals 951 and 952 denote O-rings, and reference numeral 904 denotes a reinforcement for the oil cooler.

Then, the lubricating oil 5 flows from the engine block 93 into the dirty oil passage 923 of the bracket 92 as shown by the solid line arrow in the same figure, and flows into the oil filter 91 via the heat exchanger 902 of the oil cooler 90. After that, the foreign matter is removed and the oil becomes pure oil.
The oil is returned to the engine block 93 from the oil purification passage 924 of the bracket 92 via 44. On the other hand, the oil cooler 90
The cooling water flows through the inflow pipe 901 of the oil cooler 90, cools the lubricating oil 5 in the heat exchanger 902, and flows out of the outflow pipe 903, as indicated by the broken arrow in FIG.

The oil filter 91 in the above-mentioned conventional example is a so-called spin-on type oil filter 91 in which the entire oil filter 91 is attached and detached together with the case by screws.
However, an element-exchangeable oil filter in which a case and a filter element (hereinafter, simply referred to as an element) are separated from each other has been frequently used. In such an element-replaceable oil filter, a device has been devised so that the element can be easily replaced by a method such as providing a removable cap on the case of the oil filter.

[0008]

However, the above-mentioned conventional water-cooled oil cooler connected to an oil filter has the following problems. That is, in the conventional oil cooler device, the bracket 92, the oil cooler 90, and the oil filter 91 are simply overlapped with each other. Is hard to say.

Further, in the oil cooler device, as shown in FIG. 14, a central portion of the heat exchanger 902 is pressed from above by a flange portion 943 of a center bolt 94, so that an external force is exerted entirely around the central portion. In addition, the configuration requires rigidity. On the other hand, since the oil cooler has a fine structure having a complicated bending cooling passage, there is a problem that it is difficult to reduce the weight and size unless the extra external force is eliminated. SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems, and has as its object to provide an oil cooler device having a compact structure connected to an oil filter.

[0010]

The present invention relates to an oil cooler device having a water-cooled heat exchanger for cooling lubricating oil, an oil filter for removing foreign substances in the lubricating oil, and a bracket for supporting these on an engine block. A recess is formed in the bracket to receive the oil filter and the heat exchanger, and the heat exchanger is fixed to the bottom of the bracket by a fixing tool. It is mounted in close contact, while a cap for pressing the oil filter is mounted on the head of the bracket, and
From the heat exchanger housing part in the recess to the head
Note that the inner diameter is larger than the outer diameter of the heat exchanger.
In the oil cooler device .

In the present invention, the most remarkable thing is
A recess is provided in the bracket to accommodate the oil filter and the heat exchanger therein, and the heat exchanger is fixed to the bottom of the recess. Oil filters are stacked and closely mounted on the upper surface of the heat exchanger. A cap is provided on the head of the bracket to cover the recess and press the oil filter.

[0012]

According to the present invention, the heat exchanger and the oil filter are accommodated in the recess provided inside the bracket. Therefore, a part of the space occupied by the bracket and the space occupied by the oil filter and the heat exchanger are shared and integrated, so that space saving can be achieved. Further, in the conventional apparatus, the case where the heat exchanger and the oil filter are separately provided is unnecessary, and the number of parts can be reduced.

Further, since the heat exchanger fixes itself to the concave portion of the bracket by the fixture, a fixing force is applied only to the fixing portion. That is, unlike the conventional apparatus shown in FIG. 14, a hollow center bolt through which lubricating oil passes does not entirely press the center of the heat exchanger (oil cooler).

[0014] Therefore, there is almost no external force applied to the members of the heat exchanger, which is a main part of the heat exchanger and forms a complicated flow path between the refrigerant and the lubricating oil. Therefore, the rigidity of the heat exchanging section can be greatly reduced as compared with the conventional apparatus, and the members can be made thinner and lighter.

Furthermore, since the reinforcing member (reference numeral 904 in FIG. 14) provided at the center of the heat exchanger is not required, the effective area for heat exchange in the heat exchange section is increased, and the cooling effect is relatively reduced. To improve. Therefore, the heat exchanger can be downsized. As described above, according to the present invention, it is possible to provide an oil cooler device having a compact structure connected to an oil filter.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An oil cooler according to an embodiment of the present invention will be described with reference to FIGS. In this example, a water-cooled heat exchanger 10 for cooling the lubricating oil 5 as shown in FIG.
An oil filter 20 for removing foreign matter in the lubricating oil 5 and a bracket 30 for supporting these on an engine block 93
An oil cooler device 1 having:

The bracket 30 has a recess 31 for accommodating the oil filter 20 and the heat exchanger 10, and has a bottom 311 on which the heat exchanger 10 is fixed.
3 and an oil filter 20 is closely mounted on the upper surface 101 of the heat exchanger 10. On the other hand, a cap 32 for pressing the oil filter 20 is attached to the head 34 of the bracket 30. And shown in FIG.
As described above, the accommodation of the heat exchanger 10 in the recess 31
The inner diameter from the part to the head 34 is the same as that of the heat exchanger 10.
Larger than the outer diameter of

Hereinafter, each will be described in detail. As shown in FIG. 1, the bracket 30 is attached to the engine block 93 by bolts 931, and has an upper housing 35 and a lower base 36. The base column 36 is a columnar body having an oblong cross section as shown in FIGS. 1 and 2, and has an inflow oil passage 361 and an outflow oil passage 362 for the lubricating oil 5 formed therein.

As shown in FIG. 1, a recess 31 for receiving the oil filter 20 and the heat exchanger 10 is formed in the housing 35 of the bracket 30. A male screw 342 is formed on the head 34 of the housing 35 so that the cap 3
2 is screwed. Further, the heat exchanger 10 is fixed to the bottom 311 of the housing portion 35 by a set screw serving as the fixture 33. The bottom 311 is provided with inflow / outflow ports 312 and 313 for the cooling water 7 as shown in FIG.
An inflow pipe 371 and an outflow pipe 372 are attached.

Then, as shown in FIG.
Is pumped to the oil pump 55, flows into the inflow oil passage 361 of the oil cooler device 1 from the oil pan 56, flows out of the outflow oil passage 362, and is returned to the oil pan 56 through each part of the engine 9. The cooling water 7 is provided by a water pump 7
1 and the components of the engine 9, the oil cooler 1,
Circulates between the radiators 72.

As shown in FIG. 3, the heat exchanger 10 has a cylindrical shape, an upper lid 12, a bottom plate 13, and upper and lower partition plates 14,
And a plurality of alternately stacked plates 15 and inner fins 16 are integrated by vacuum brazing. As shown in FIGS. 4 and 5, the upper lid 12 is
2 is a lid-like member having an oil purification hole 121 through which the oil passes, a depression 122 through which the dirty oil 51 passes, and an oval side hole 123. On one side, there is a thick portion 124 serving as an upper lid of the cooling water passage.

The upper surface of the upper lid 12 has a circular convex portion 12 which fits into a circular concave portion 251 of the oil filter 20 described later.
5 are provided. 4 and 5, reference numeral 126 denotes a positioning hole at the time of assembly. In addition, the upper lid 1
Reference numeral 2 is formed of a metal such as an aluminum alloy or stainless steel.

As shown in FIG. 6, the bottom plate 13 of the heat exchanger 10 is a circular plate-like body having an oil purification passage 131 provided at a central portion, a plurality of dirty oil ports 132, and a pair of cooling water ports 133. It is. The heat exchanger 10 is mounted on the bottom plate 13 with the bracket 3.
A female screw hole 134 for screwing to zero is provided.
On the lower surface of the bottom plate 13, an O-ring assembling groove 135 for sealing the cooling water is provided. The left female screw hole 134 also serves as the positioning hole 126. In addition,
The bottom plate 13 is formed of a metal such as an aluminum alloy or stainless steel.

As shown in FIG. 3, the lower part of the upper lid 12 and the upper part of the bottom plate 13 are similarly provided with an oil purification passage, a dirty oil passage,
A partition plate 14 having a cooling water passage (not shown) is provided. Between the two partition plates 14, a plurality of plates 15 and inner fins 16 to be described later for performing heat exchange are alternately stacked.

The cooling water passage of the partition plate 14 is formed in such a shape that the cooling water 7 of the plate 15 and the inner fin 16 does not flow into the oil passages of the upper lid 12 and the bottom plate 13. The partition plate 13 is made of a thin plate of about 0.8 mm in thickness such as an aluminum alloy or stainless steel.

The plate 15 and the inner fin 16
As an example, it is a plate-like body having a shape as shown in FIGS. 7 and 8, having oil purification passages 151 and 161 at the center, and having complicated shapes of dirty oil passages 152 and 162 and a cooling water passage. 153 and 163. The plates 15 and the inner fins 16 are alternately stacked, and the plate 15 and the inner fins 16 are sequentially rotated by 180 °.

The shapes of the passages 152, 153, 162, and 163 are formed so that the contaminated oil 51 and the cooling water 7 flow zigzag through the maze-like passages (detailed description will be given later). Omitted). In addition, plate 15
Each of the inner fins 16 is made of a thin plate of about 0.8 mm such as an aluminum alloy or stainless steel.

The overall shape of the oil filter 20 mounted on the upper part of the heat exchanger 10 is cylindrical.
As shown in the figure, the upper and lower plates 23 and 25, the core 24 and the filter 21 are bonded and assembled. The lower plate 25 is formed with a circular concave portion 251 that fits with the circular convex portion 125 of the heat exchanger 10.

The upper plate 23 is provided with a fitting recess 231 into which a spring inserted between the upper plate 23 and a cap 32 described later is fitted. In addition, the cylindrical core metal 24
Are provided with a number of oil purification inlets 241. And
A filter 21 is provided around the cored bar 24.

As shown in FIG. 10, a housing 35 of the bracket 30 for housing the heat exchanger 10 and the oil filter 20 has an inlet 312 for the cooling water 7 at a bottom 311 thereof.
And an outlet 313, and an inflow oil passage 361 for dirty oil and an outflow oil passage 362 for purified oil.

In the bottom 311, the dirty oil 51 is filled with heat exchanger 1.
There is provided a dirty oil groove 316 for inflow into the zero. Then, a fixture 33 for attaching the heat exchanger 10 (FIG. 1, FIG.
A through hole 317 for a set screw as shown in FIG. 2) is provided.
When attaching the heat exchanger 10 with the set screw,
A packing is interposed between the bottom surface of the housing portion 35 and the set screw.

On the other hand, a male screw 342 for screwing the cap 32 is formed in the head portion 34 of the housing portion 35.
Further, an O-ring groove 341 is provided. The bracket 30 including the base column 36 is manufactured by casting, die casting, cutting, or the like using an aluminum alloy or the like.

The cap 32 has a circular lid shape as shown in FIG. 11, and has a female screw 323 formed on the inner wall thereof. A hexagonal column portion 322 for a tool used when the cap 32 is screwed to the head portion 34 of the storage portion 35 is provided at the top. The cap 32 is manufactured using an aluminum alloy, stainless steel, or the like. And cap 3
Between the fitting 2 and the fitting recess 231 of the oil filter 20, a spring made of spring steel or the like for pressing the oil filter 20 downward is fitted.

Next, the operation and effect of the oil cooler device 1 of this embodiment will be described. In the oil cooler device 1 of the present embodiment, as shown in FIG.
It flows in through an inflow pipe 371 attached to the heat exchanger 11 and flows out again through an outflow pipe 372 through a maze-like flow path formed by the plate 15 and the inner fin 16 of the heat exchanger 10.

The bottom plate 13 of the heat exchanger 10 is
An O-ring (not shown) fixed to the bottom 311 of the housing portion 35 by a set screw and fitted into the O-ring assembling groove 135 (FIG. 3) seals the cooling water 7. Further, the lubricating oil 5 flows from the inflow oil passage 361 provided in the base column 36 and is cooled by a labyrinth-like flow path formed by the plate 15 and the inner fin 16 of the heat exchanger 10.

Next, the lubricating oil 5 flowing out of the oval side hole 123 provided in the upper lid 12 of the heat exchanger 10 flows into the oil filter 20, passes through the filter 21 to remove foreign substances, and becomes the purified oil 52. The oil purification passages in the metal core 24 and the oil purification passages 121 and 13 in the central part of the heat exchanger 10.
After passing through 1,151,161, the base 36 of the bracket 30
Flows out from the oil spill passage 362 provided at

As described above, the heat exchanger 10 and the housing 35 are tightly sealed by the set screw, and the lubricating oil 5 is sealed by the surface pressure. On the other hand, the oil filter 20 is connected to the upper cover 1 of the heat exchanger 10 by a spring.
2 and the surface pressure of the lubricating oil 5
Is sealed.

In this embodiment, the bracket 30 is connected to the oil filter 2.
0 and the heat exchanger 10 are used as a common housing. Therefore, the space of the bracket 30 is effectively used, and the whole is space-saving and compact. In addition, since it is not necessary to provide separate housings for the oil filter 20 and the heat exchanger 10, the number of parts can be reduced.

Further, since the heat exchanger 10 is attached by screwing the bottom plate 13 to the bottom 311 of the bracket 30, no force is applied to the portion other than the bottom plate 13 for fixing to the bracket 30. Therefore, the reinforcing member 904 (FIG. 14), which is necessary in the conventional device, is not required.

Therefore, the space that has been taken away by the thickness of the threaded portion of the reinforcing member 904 and the center bolt 94 can be used effectively, and the effective use area of the plate 15 and the inner fin 16 for performing heat exchange increases, and the heat exchange performance increases. And the size can be relatively reduced.

Further, since the load from the center bolt 94 is not applied to the whole, the thickness and weight of the plate 15 and the inner fin 16, which are important parts of heat exchange, can be reduced. In addition, the effect of reducing the overall weight due to the elimination of the iron-made heavy center bolt 94 and the reinforcing member 904 is extremely large.

Further, since the oil filter 20 is closely mounted on the heat exchanger 10, no O-ring or the like is required between the two, and the overall height can be reduced. On the other hand, the filter 21 of the oil filter 20 can be replaced very easily by removing the cap 32. In addition, the removal of the heat exchanger 10 can be easily performed by removing the set screw on the bottom 311 of the bracket 30.

As described above, according to the present embodiment, the oil cooler device 1 having a compact structure connected to the oil filter 20 can be provided. The attachment of the cap 32 to the housing portion 35 may be performed by a plurality of small-diameter screws instead of the method of screwing the cap 32 and the inner and outer peripheral surfaces of the housing portion 35 as in this example.

As shown in FIG. 12, a female screw 352 is provided on the lower
It is preferable to provide the drain bolt 38 via the third bolt 3. Then, when the filter 21 of the oil filter 20 is replaced, the internal lubricating oil 5 can be discharged, so that the replacement operation becomes easier.

[Brief description of the drawings]

FIG. 1 is an overall explanatory view of an oil cooler device according to an embodiment, and is a cross-sectional view taken along line AA of FIG. 2;

FIG. 2 is a bottom view of the oil cooler device of the embodiment.

FIG. 3 is a plan view (a) and a front sectional view (b) of the heat exchanger of the embodiment.

FIG. 4 is a plan view of an upper lid of the heat exchanger according to the embodiment (a).
And FIG. 5B is a front view (b) of a cross section taken along line BB of FIG.

FIG. 5 is a bottom view (a) and a partial side view (b) of FIG. 4;

6A is a plan view of a bottom plate of the heat exchanger according to the embodiment, and FIG. 6B is a sectional view taken along line CC of FIG.

FIG. 7 is a plan view of a plate of the heat exchanger according to the embodiment.

FIG. 8 is a plan view of an inner fin of the heat exchanger according to the embodiment.

FIG. 9 is a front view of a partial cross section of the oil filter of the embodiment.

FIG. 10A is a plan view of the bracket according to the embodiment, and FIG.
-D arrow line sectional drawing (b).

FIG. 11 is a partial plan view (a) and a partial cross-sectional front view (b) of the cap of the embodiment.

FIG. 12 is an explanatory diagram of a drain bolt in an additional description of the embodiment.

FIG. 13 is an explanatory view of a lubricating oil flow path of a conventional oil cooler device.

FIG. 14 is an overall explanatory view of a conventional air-cooled oil cooler.

[Explanation of symbols]

 1. . . 9. oil cooler device, . . Heat exchanger, 15. . . Plate, 16. . . Innafin, 20. . . Oil filter, 21. . . Filter, 24. . . Cored bar, 30. . . Bracket, 31. . . Recess, 311. . . Bottom, 32. . . Cap, 33. . . Fixing device, 34. . . Head, 35. . . Receiving section, 36. . . Pillar, 5. . . Lubricating oil, 51. . . Dirty oil, 52. . . 6. oil purification; . . Cooling water, 93. . . Engine block,

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) F01M 5/00 F01M 11/03 F28D 9/00 F28F 3/08 301

Claims (2)

(57) [Claims] 1. A water-cooled heat exchanger for cooling lubricating oil,
An oil cooler device comprising an oil filter for removing foreign matter in lubricating oil and a bracket for supporting the oil filter on an engine block, wherein the bracket has a recess for accommodating the oil filter and the heat exchanger, The heat exchanger is fixed to the bottom with a fixture, and an oil filter is mounted on the upper surface of the heat exchanger in close contact, while a cap for pressing the oil filter is mounted on the head of the bracket. From the heat exchanger housing part in the recess,
The inner diameter reaching the head should be larger than the outer diameter of the heat exchanger.
And an oil cooler device. 2. The heat exchanger according to claim 1, wherein
Located on the engine block side above the oil filter
So that it is housed in the recess of the bracket
An oil cooler device comprising: