JPH0610644A - Oil strainer for internal combustion engine - Google Patents

Abstract

PURPOSE:To prevent air from being mixed into oil in advance even when an inferior position is generated in a jointed part. CONSTITUTION:A strainer body 4 consists of an upper plate 7, a lower plate 8, a net and so on. The upper side of the lower plate 8 is extended more upwards than a jointed part 11, and a covering part 12 which almost covers the upper plate 7 is formed integratedly. A space between the covering part 12 and the upper plate 7 is made an oil holding part 13 for storing and holding oil A. As a result, even if the jointed part 11 is exposed to the air and an inferior position is generated in the jointed part 11, only the outer surface of the lower plate 8 is exposed directly to the air, and oil A is held in the oil holding part 13. It is thus possible to prevent air from invading from the inferior position of the jointed part 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oil strainer installed in an oil pan for capturing foreign matter in lubricating oil.

[0002]

2. Description of the Related Art Conventionally, as this type of technology, for example, the one disclosed in Japanese Utility Model Laid-Open No. 53-159436 is known. Generally, the oil strainer including this technology is constructed as follows.

That is, as shown in FIG. 5, the oil strainer 31 comprises a pipe 33 connected to the suction side of an oil pump 32 and a strainer main body 34, which are integrally supported by a stay 35. There is. The strainer body 34 is immersed in the oil stored in the oil pan 36 of the engine, and includes the lower plate 37, the upper plate 38, and the net 3 interposed therebetween.
It is composed of 9 and the like. An opening 40 is formed below the lower plate 37, and the opening 40 serves as an oil suction port.

As shown in FIG. 6, at the joint portion 41 for joining the lower plate 37 and the upper plate 38,
In addition to the net 39, the ring plate 42 and the gasket 4
3 is interposed. And, for example, the upper plate 3
The peripheral edge of 8 is bent inward downward, and the peripheral edge of the lower plate 37 is sandwiched inside the bent portion. Then, by welding or the like at the joint portion 41,
The lower plate 37 and the upper plate 38 are joined to each other.

In the above oil strainer 31,
By driving the oil pump 32, the oil stored in the oil pan 36 is sucked into the strainer body 34 through the opening 40. In addition, oil is pipe 33
Is supplied to various parts of the engine through the oil pump 32. At this time, since foreign matter in the oil is captured by the net 39, clean oil is supplied to the oil pump 32 and the engine.

[0006]

However, in the above prior art, when the vehicle is located on a slope, the oil surface may be inclined and a part of the joint 41 may be exposed to the air. At this time, if a joint failure should occur in the joint portion 41 due to deterioration over time, air may enter the strainer body 34 from the defective portion, and air may be mixed into the oil. When the air is mixed with the oil, the lubrication of the engine may be impaired.

The present invention has been made in view of the above-mentioned circumstances, and an object thereof is to provide an oil strainer for an internal combustion engine in which a lower plate and an upper plate are joined to each other, by any chance if a defective portion is present at the joint. An object of the present invention is to provide an oil strainer for an internal combustion engine that can prevent air from being mixed with intake oil even if it occurs.

[0008]

In order to achieve the above object, in the present invention, a pipe connected to the suction side of an oil pump for supplying oil to various places of an internal combustion engine and an open end of the pipe are provided. An upper plate, which is provided and has an umbrella shape that spreads downward, is joined to the upper plate at a joining portion and has an opening portion on the lower side, and is immersed in oil stored in an oil pan. Lower plate,
In an oil strainer of an internal combustion engine, which is interposed between the upper plate and the lower plate and has a net for removing foreign matters in the oil, the lower plate is extended to above the joint portion, The gist of the present invention is to provide a coating portion that substantially covers the periphery of the above, and use a space between the coating portion and the upper plate as an oil holding portion that holds oil.

[0009]

According to the above construction, when the oil pump of the internal combustion engine is driven, the oil stored in the oil pan is sucked from the opening on the lower side of the lower plate and passes through the upper plate, the pipe and the oil pump. It is then supplied to various parts of the internal combustion engine. At this time, foreign matter in the oil is captured by the net, and the oil is cleaned.

Further, the periphery of the upper plate is covered with the covering portion of the lower plate extending above the joint portion, and the space between the covering portion and the upper plate serves as an oil holding portion. Therefore, in the unlikely event that a joint failure occurs in the joint due to deterioration over time, even if the periphery of the joint corresponding to the defective location is exposed to the air, the defective location will be sealed by the coating and oil. It is never exposed to the outside. The oil in the oil holding portion may enter the inside of the upper plate from the defective portion of the joint portion, but the air does not enter the inside of the upper plate from the defective portion.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an oil strainer for an internal combustion engine according to the present invention will be described in detail below with reference to FIGS.

As shown in FIG. 1, an oil strainer 1 is composed of a pipe 3 connected to the suction side of an oil pump 2 of an engine and a strainer main body 4, and the pipe 3 and strainer main body 4 are integrated into a stay. Supported by 5. The strainer body 4 is immersed in the oil A stored in the oil pan 6 of the engine. The strainer body 4 includes an upper plate 7, a lower plate 8 and a net 9. The upper plate 7 has an umbrella shape that spreads downward, and its upper end is fitted and connected to the pipe 3. An opening 10 is formed on the lower side of the lower plate 8 to serve as a suction port for the oil A. Further, the net 9 is for removing foreign matters in the oil A, and is made of wire mesh of about "15 to 30 mesh",
The upper plate 7 and the lower plate 8 are sandwiched by the joint portion 11 in a state of being interposed between them.

The lower plate 8 extends above the joint portion 11, and the extending portion serves as a covering portion 12 that substantially covers the periphery of the upper plate 7. The space between the covering portion 12 and the upper plate 7 is an oil holding portion 13 that holds the oil A. The oil A is always stored in the oil holding portion 13, and the oil A is always present at least in the vicinity of the joint 11 (the entire circumference of the joint 11). Also, the covering part 1
A slight clearance C is provided between the pipe 2 and the pipe 3 (stay 5), and the oil A is supplied from the clearance C to the oil holding portion 13 at any time during operation.

As shown in FIG. 2, in the joint portion 11, the lower plate 8 is bent so as to sandwich both peripheral edge portions of the upper plate 7 and the net 9. A ring plate 14 is interposed between the net 9 and the upper plate 7, and a rubber gasket 15 is interposed between the net 9 and the lower plate 8. The ring plate 14 and the gasket 15 improve the sealing property of the joint 11. Then, in the joint portion 11, welding is performed between the upper plate 7 and the lower plate 8 to more firmly join the two.

Next, the operation of the oil strainer configured as described above will be described. FIG. 1 shows a state in which the oil pan 6 is not inclined and the oil surface of the oil A stored in the oil pan 6 is substantially parallel to the bottom surface of the oil pan 6. In this state, when the oil pump 2 is driven, the oil A stored in the oil pan 6 is sucked into the strainer body 4 through the opening 10. The oil A is supplied to various parts of the engine via the pipe 3 and the oil pump 2 for lubrication. At this time, since the foreign matter in the oil A is captured by the net 9, there is no possibility that the oil is cleaned and the oil containing the foreign matter is supplied to the oil pump 2 and the engine. Damage can be prevented in advance.

When traveling on a slope or the like, as shown in FIG. 3, the oil strainer 1 inclines, and the oil surface of the oil A stored in the oil pan 6 inclines, The outside of part of the joint 11 may be exposed to the air from the oil surface.

Further, as shown in FIG. 4, when the viscosity of the oil A is low, the oil surface may wobble due to vibrations or the like. Even in such a case, the outside of the joint 11 may be exposed to the air from the oil surface.

In these cases, even if a joint failure occurs in the joint portion 11 due to deterioration with time or the like, only the outer surface of the lower plate 8 is directly exposed to the air.
Further, the oil A is always held in the oil holding portion 13. Therefore, air may not enter from the defective portion of the joint portion 11 though it may enter the oil holding portion 13. As a result, it is possible to prevent air from being mixed into the intake oil, and thus prevent problems such as poor lubrication from occurring.

The present invention is not limited to the above-described embodiment, but may be implemented as follows with a part of the configuration appropriately changed without departing from the spirit of the invention. (1) In the above embodiment, the ring plate 14 is interposed between the net 9 and the upper plate 7, and the gasket 15 is interposed between the net 9 and the lower plate 8. It is also possible to omit at least one of the gasket 15 and simplify the sealing property inside the joint 11.

(2) In the above embodiment, the opening 10 is formed on the lower side of the lower plate 8, and the opening 10 is filled with the oil A.
However, a tubular or funnel-shaped guide member may be extended from this opening 10 and the opening end may be used as the oil A suction port.

(3) In the above embodiment, the net 9 is set to "15".
Although it is formed of a wire mesh of about "30 mesh", the degree of the mesh may be changed, and the net 9 may be formed of synthetic fiber having oil resistance.

(4) In the above-described embodiment, the lower plate 8 and the upper plate 7 are welded to each other so that the two members 7 and 8 are joined more firmly. However, this welding may be omitted. Further, instead of welding, rivets or the like may be used for joining.

(4) In the above-mentioned embodiment, the pipe 3 and the upper plate 7 are constituted by separate members, but they may be integrated.

[0024]

As described in detail above, according to the present invention, in the oil strainer of the internal combustion engine in which the upper plate and the lower plate are joined to each other at the joining portion, the lower plate is placed above the joining portion. Extend it to
Since a covering part that almost covers the upper plate is provided and the space between the covering part and the upper plate is an oil holding part that holds oil, even if a defective part occurs at the joint part, air will not enter. This has an excellent effect that air can be prevented from being mixed with the oil by suppressing it, and that the occurrence of problems such as poor lubrication can be prevented in advance.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of an oil strainer in an embodiment embodying the present invention.

FIG. 2 is a partial cross-sectional view showing an enlarged joint portion of an oil strainer in one embodiment.

FIG. 3 is a cross-sectional view showing a state where the oil strainer is inclined in one embodiment.

FIG. 4 is a cross-sectional view showing a state where an oil surface is wavy due to vibration or the like in one embodiment.

FIG. 5 is a sectional view of an oil strainer in a conventional example.

FIG. 6 is a partial cross-sectional view showing an enlarged joint portion of an oil strainer in a conventional example.

[Explanation of symbols]

2 ... Oil pump, 3 ... Pipe, 6 ... Oil pan, 7 ...
Upper plate, 8 ... Lower plate, 9 ... Net, 10
... Opening part, 11 ... Joining part, 12 ... Covering part, 13 ... Oil holding part, A ... Oil.

Claims (1)

[Claims] 1. A pipe connected to an intake side of an oil pump for supplying oil to various places of an internal combustion engine, an upper plate provided at an open end of the pipe and having an umbrella shape spreading downward. Between the upper plate and the lower plate, the lower plate is joined to the upper plate at the joining portion, has an opening on the lower side, and is immersed in the oil stored in the oil pan. In an oil strainer for an internal combustion engine, which is interposed and has a net for removing foreign matter in oil, the lower plate is extended to a position higher than the joint portion, and substantially covers the periphery of the upper plate. An oil strainer for an internal combustion engine, wherein a coating portion is provided, and a space between the coating portion and the upper plate is an oil holding portion that holds oil.