JP4519362B2 - Oil cooler with integrated filter - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an oil cooler used for cooling, for example, lubricating oil of an internal combustion engine or hydraulic oil of an automatic transmission, and more particularly to a filter-integrated oil cooler integrally provided with an oil filter.
[0002]
[Prior art]
For example, as an oil cooler for internal combustion engine lubricating oil or automatic transmission hydraulic oil, a water-cooled oil cooler in which a large number of core plates are stacked to alternately configure an oil flow path and a cooling water flow path is known. It has been. In order to secure the space for mounting the oil cooler, for example, Japanese Patent Application Laid-Open No. 2000-204920 discloses an oil cooler attached to the outer surface of a cylinder block of an internal combustion engine, and a male screw portion at the center thereof. A configuration is disclosed in which a provided center pipe is erected and a so-called cartridge-type oil filter is screwed and fixed to the center pipe. That is, the oil cooler and the cartridge type oil filter are attached in a stacked manner in two stages.
[0003]
Further, as shown in FIG. 8 of Japanese Utility Model Publication No. 63-57309, there is also known a configuration in which an oil cooler is attached to a side surface of an oil filter bracket that detachably supports a cartridge type oil filter.
[0004]
[Problems to be solved by the invention]
However, in such a conventional configuration, the cartridge-type oil filter and the oil cooler are substantially separate parts that are independent of each other, and are merely combined together. And a large installation space is required. In other words, a single oil filter and a single oil cooler occupy an installation space that is basically the same as the required space, and securing the installation space is a major problem in the recent miniaturization of vehicle space. Become.
[0005]
Accordingly, an object of the present invention is to provide a small filter-integrated oil cooler that is substantially integrally provided with a filter element.
[0006]
[Means for Solving the Problems]
The filter-integrated oil cooler according to the present invention includes a core portion in which a large number of core plates are stacked, and an oil flow path and a cooling water flow path are alternately arranged between them, and is fixed to the bottom surface of the core part. And a bottom plate provided with an opening serving as an oil inlet or an oil outlet of the core portion at a substantially central portion, and a cylindrical shape, and one end portion is supported by the bottom plate so as to surround the opening portion. comprising a filter element formed by, formed to accommodate the filter element to the main body of the device oil is used, and the element accommodating chamber opening is covered by the bottom plate at one end, the said elements The bottom plate is attached to the main body so as to cover the opening of the storage chamber, and is opened to the joint surface with the bottom plate so as to cover the bottom plate. An oil passage communicating with the core portion through an oil passage communicating with the element housing chamber, but is characterized in that it is formed in the interior of the body portion.
[0007]
For example, oil passes through the filter element and then flows into the oil cooler where it is cooled by exchanging heat with cooling water. Or conversely, after passing through the oil cooler and being cooled, it flows through the filter element. In the former case, oil is introduced into the oil cooler through the opening at the substantially central portion of the bottom plate. In the latter case, oil is introduced from the oil cooler to the inner peripheral side of the oil filter through the opening at the substantially central portion of the bottom plate. Since the filter element is supported by the bottom plate of the oil cooler and this filter element is accommodated in the element accommodating chamber, the overall size is very small.
[0008]
In the present invention, the element accommodating chamber is recessed in the body of the device which the oil is employed. That is, for example, an element accommodating chamber is recessed in an oil cooler mounting portion in a cylinder block of an internal combustion engine, a housing of an automatic transmission, or the like, and a bottom plate of the oil cooler is mounted here.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.
[0010]
Figures 1 and 2 show an embodiment of a filter-integrated oil cooler according to the present invention. The first embodiment is configured to be directly attached to, for example, a cylinder block 31 of an internal combustion engine, and is positioned at the core portion 1 for exchanging heat between oil and cooling water, and at the bottom of the core portion 1. A bottom plate 2, a filter element 3 supported by the bottom plate 2, and an element storage chamber 4 recessed on the cylinder block 31 side are provided.
[0011]
The core portion 1 is formed by laminating a large number of core plates 5, and oil flow paths 6 and cooling water flow paths 7 are alternately formed between the core plates 5. Specifically, as shown in FIG. 2, the core plate 5 has a substantially rectangular shape as a whole, and oil communication holes 8 are formed at two locations on the diagonal, and at two locations on different diagonals. The cooling water communication hole 9 is formed as an opening. The core plate 5 has two types, that is, the periphery of the oil communication hole 8 and the cooling water communication hole 9 formed as a boss portion 10 and a flat one, and these two types By alternately combining the core plates 5, a constant interval that serves as a flow path is maintained between the core plates 5. And between the two adjacent core plates 5, the respective oil communication holes 8 are in positions that are coincident with each other, and the core plates are adjacent so that the periphery of the boss portion 10 surrounds each oil communication hole 8. 5 is joined. As a result, the oil flow paths 6 communicate with each other through a large number of oil communication holes 8, and the oil can flow vertically in the core portion 1 as a whole. Although the cooling water communication hole 9 is not shown in FIG. 1, the cooling water communication hole 9 has the same configuration, so that the cooling water flows vertically in the core portion 1 and flows in each cooling water flow path 7. It has become. In FIG. 1, the oil communication holes 8 of each core plate 5 are depicted in a vertically aligned position. However, in practice, one or more core plates 5 (for example, reference numeral 5) at an appropriate intermediate position are depicted. In the core plate indicated by ', one of the pair of oil communication holes 8 is closed, and the oil flows while making a U-turn left and right as a whole. Further, fin plates 11 are sandwiched between the oil flow paths 6, respectively. The peripheral edge 5a of the core plate 5 is tapered, and the peripheral edges 5a are in close contact with each other when the core plates 5 are stacked. In addition, a tapered cylindrical portion 5b protruding in a substantially conical shape is provided at the center portion of each core plate 5, and a plurality of tapered cylindrical portions 5b sequentially overlap each other so as to penetrate the core portion 1 vertically. A central oil passage 14 is formed. The central oil passage 14 does not communicate with the oil flow path 6 between the core plates 5.
[0012]
A top plate 15 is laminated on the uppermost core plate 5 of the core portion 1. In the first embodiment, the top plate 15 closes the pair of cooling water communication holes 9 of the uppermost core plate 5 and closes one oil communication hole 8. And the top plate 15 has the bulging part 15a along one diagonal line, and, thereby, the upper communication path 16 which connects the other oil communication hole 8 and the upper end of the center oil path 14 is comprised. .
[0013]
A bottom plate 2 made of a relatively thick metal plate having sufficient rigidity is laminated below the lowermost core plate 5. The bottom plate 2 has a flange portion 17 extending outward from the core plate 5, and is fixed to the cylinder block 31 by a plurality of bolts 18 in the flange portion 17. The bottom plate 2 has an opening 19 that matches the central oil passage 14 at the center, and a cylindrical portion 20 that surrounds the opening 19 projects toward the opposite side of the core 1. It is formed as follows.
[0014]
The numerous core plates 5, fin plates 11, top plate 15, and bottom plate 2 described above are integrated by brazing.
[0015]
The filter element 3 is a filter element such as a filter paper which is bent many times and arranged in a cylindrical shape, and end plates 21 and 22 are attached to both upper and lower ends thereof, and the oil flows in the radial direction. . The lower end plate 22 completely closes one end surface of the filter element 3, and the upper end plate 21 has a mounting hole at the center and a seal member 23 at the periphery thereof. The seal member 23 has appropriate elasticity, and the filter element 3 is held by the cylindrical portion 20 by the seal member 23.
[0016]
The element accommodating chamber 4 in which the filter element 3 is accommodated is formed to have a size such that a slight gap is generated around the filter element 3. As described above, the bottom plate 2 is attached by the bolt 18. The upper end opening is covered.
[0017]
In the real施例This oil is adapted to pass through the filter element 3 after passing through the core portion 1, in the cylinder block 31, a first oil passage 24 for introducing the hot oil to the oil cooler And a second oil passage 25 through which oil after filtration is returned from the oil cooler. The first oil passage 24 opens to a seat surface to which the bottom plate 2 is attached, and communicates with the lowermost oil flow path 6 of the core portion 1 through a communication hole 26 of the bottom plate 2. The second oil passage 25 communicates with the bottom of the element storage chamber 4. Seal rings 27 and 28 are provided around the opening of the first oil passage 24 and around the upper end opening of the element storage chamber 4, respectively. Although not shown, like the first oil passage 24, a cooling water introduction passage and a cooling water discharge passage are provided inside the cylinder block 31 and communicate with the cooling water passage 7 of the core portion 1. Yes.
[0018]
In the above-described configuration, oil that has become hot due to lubrication of each part of the internal combustion engine is introduced from the first oil passage 24 into the core portion 1 and cooled by heat exchange with the cooling water, and then the upper communication passage 16. To the central oil passage 14. Then, it enters the filter element 3 from the opening 19 of the bottom plate 2, flows in the radial direction through the filter element 3, is filtered, and finally flows into the second oil passage 25.
[0019]
In the real施例this, although it is necessary to form a relatively small element accommodating chamber 4 to the seat surface of the cylinder block 31 side of the oil cooler is attached, as the size of the entire oil cooler is greatly miniaturized . In particular, the filter element 3 is not an independent structure as an oil filter, and is directly attached to the bottom plate 2 necessary for the bottom of the core portion 1, so that the occupied space is reduced and the number of parts is very large. It has become less. In this embodiment, the filter element 3 can be replaced by removing the bottom plate 2 via the bolt 18.
[0020]
It is also possible to reverse the oil flow so that the oil is introduced from the second oil passage 25 into the element accommodating chamber 4 and discharged from the core portion 1 to the first oil passage 24.
[0021]
Has been described on the basis of the present invention to a real施例, the invention is not limited to this embodiment, it is needless to say that various modifications can be. In the description of the above embodiment, for convenience of explanation, the vertical relationship has been described along the posture illustrated in FIG. 1 and the like, but these oil coolers have a posture different from that in FIG. Of course, it can be attached with.
[0022]
【The invention's effect】
As is clear from the above description, according to the filter-integrated oil cooler according to the present invention, the oil can be cooled and filtered with a single device, and as a whole, it can be configured to be very small. it can. In particular, the filter element is attached to the bottom plate provided in the core portion of the oil cooler, and the opening of the element storage chamber is covered by the bottom plate. Compared to a conventional configuration in which a cooler is simply overlapped, a significant reduction in size can be achieved and the number of parts can be minimized.
[0023]
In particular, by having recessed elements accommodating chamber in the main body section, that the housing of the engine cylinder block or automatic transmission of the apparatus which OIL is used, becomes a configuration which is more simplified, the number of parts is further reduced .
[Brief description of the drawings]
FIG. 1 is a sectional view showing an embodiment of an oil cooler according to the present invention.
FIG. 2 is a plan view of the oil cooler of the real施例of this.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Core part 2 ... Bottom plate 3 ... Filter element 4 ... Element accommodating chamber 5 ... Core plate 14 ... Central oil passage 19 ... Opening part 23 ... Seal member 24 ... First oil passage 25 ... Second oil passage 31 ... Cylinder block

Claims (1)

A large number of core plates are laminated, and an oil flow path and a cooling water flow path are alternately formed between the core parts. The core part is fixed to the bottom surface of the core part, and substantially at the center part. The bottom plate is provided with an opening serving as an oil inlet or oil outlet, a filter element that is cylindrical and supported by the bottom plate so that one end of the opening surrounds the opening, and oil is used. An element housing chamber formed to house the filter element in the main body of the device and having an opening at one end covered by the bottom plate ,
The bottom plate is attached to the main body so as to cover the opening of the element storage chamber,
An oil passage that opens to the joint surface with the bottom plate and communicates with the core portion through the bottom plate and an oil passage that communicates with the element storage chamber are formed inside the main body portion. A filter-integrated oil cooler.

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