JPH07236803A - Disposable oil filter for internal combustion engine - Google Patents

Abstract

PURPOSE:To provide a connection structure having practicality from the aspect of pressure-resistant strength in a disposable filter wherein a filter element is arranged in a cup-shaped case having an open end and the open end is closed by a lid plate provided with screw holes. CONSTITUTION:A rising wall 25 is provided to the outer periphery of a lid plate 22 and the end part of a case 20 is rolled in the rising wall 25 to bond the inner peripheral surface of the end part of the case 20 to the inner and outer peripheries of the rising wall 25 under pressure and bonded to the outer peripheral surface of the lower end of the rising wall 25 in a bent state under pressure.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present application relates to a disposable oil filter mounted and used in a lubricating oil system of an internal combustion engine.

[0002]

2. Description of the Related Art Disposable oil filters have a structure in which a filter element is housed in a case and an open end of the case is closed by a bottom cover, as disclosed in Japanese Utility Model Laid-Open No. 62-109714. . That is,
In FIG. 7, the bottom cover 1 has an oil intake port 2 provided with a screw at the center, and an oil intake port 3 on the outer periphery thereof.
have. A thin cover plate 4 is provided on the outer side of the bottom cover 1, and an outer peripheral edge of the cover plate 4 is caulked with a lower end edge of the case 5. The edge of the cover plate 4 is bent to form the receiving portion 7 of the seal packing 6. Usually, in this type of oil filter, the cover plate 4 and the bottom cover 1 are welded by spot welding.

The above oil filter is used by mounting an oil outlet 2 of a bottom cover 1 by screwing it into a stud bolt provided on a mounting mount of an internal combustion engine (not shown).

Further, an oil filter having the following structure is also known from Japanese Utility Model Laid-Open No. 62-180616. That is, as shown in FIG. 8, the filter element 1
A cover plate 10 having a female screw portion 8 in the center and a through hole 9 formed around the female screw portion 8 is provided at the open end of the case 7 that houses 2 therein. The cover 7 and the case 7 are integrated with each other by abutting on the outer peripheral end face and bending the lower end of the case 7 inward. The lower end of the case 7 is bent to form a receiving portion for the gasket 11.

[0005]

In the first conventional example described above, when the disposable oil filter is screwed into the mounting mount, it is necessary to weld the cover plate 4 and the bottom cover 1 so as not to rotate idle. There is. Such welding may deteriorate the material properties of the welded portion between the cover plate 4 and the bottom cover 1 and cause cracks. Further, since the case 5 and the cover plate 4 are caulked, the cover plate 4 is required in addition to the bottom cover 1 and the case 5, and the caulked portion with the cover plate 4 and the bottom cover 1 are It is necessary to apply a sealant between the cover plate 4 and the cover plate 4. As a result, the number of parts increases and the manufacturing process becomes complicated.

The second conventional example has the advantage that the structure corresponding to the cover plate 4 of the first example is abolished, but the structure is simplified.
There is a difficulty in practicality. That is, the lid plate 10 and the case 7 are integrated, but the binding force between them is not sufficient, and when mounted and used in an internal combustion engine, they cannot withstand vibration force and oil pressure. . Further, the case 7 is bent to form the receiving portion of the gasket 11,
It is difficult to appropriately control the height dimension during bending, and there is also a drawback that a predetermined receiving portion having a gasket bending margin is not formed.

[0007]

A filter element is provided in a cup-shaped case having an open upper end, a screw hole is provided in the central portion, and a plurality of through holes are provided in the outer periphery of the filter element. Cover the open end of the case with a lid plate with a wall, wrap the upper end of the case around the outer circumference of the rising wall of the lid plate, and crimp the lid plate receiving part at the end of the case to the inner and outer peripheral surfaces of the rising wall. At the same time, a disposable oil filter is formed by crimping the end portion of the case to the outer peripheral surface of the lower end of the rising wall in a bent state.

[0008]

The function of the lid plate and the end of the case is not welded and the material is not deteriorated. The winding fastening joint between the rising wall of the cover plate and the end of the case enhances the binding force. The bent end portion of the case constituting the receiving portion of the seal packing has a value substantially equal to the height of the rising wall plus the plate thickness of the case, which facilitates formation of the receiving portion having a predetermined height.

[0009]

FIG. 1 is a disposable oil filter for an internal combustion engine according to an embodiment of the present invention, in which a filter element 21 is provided in a cup-shaped case 20 having an open upper end.
The open end is covered with a cover plate 22 having a certain thickness.
The cover plate 22 is in the shape of a disk, has a screw hole 23 in the center, a plurality of through holes 24 in the outer periphery thereof, and further has an annular rising wall 25 in the outer periphery.

The inside diameter of the case 20 is set to a value slightly smaller than the outside diameter of the cover plate 22, and the end of the case 20 is wound around and joined to the outer periphery of the rising wall 25 of the cover plate 22. . As shown in FIG. 2, the joint portions are formed on the inner and outer peripheral surfaces of the rising wall 25 at the first and second end portions 20a and 20b of the case 20.
The inner peripheral surface of the case 20 is crimped and the third end portion 20c of the case 20 is crimped to the lid plate receiving portion 22a at the lower end of the rising wall 25 in a bent state.

The filter element 21 is, as is well known,
A structure in which a chrysanthemum-shaped fold-fold filter paper body is disposed on the outer circumference of the multi-hole inner cylinder 26, and the upper and lower ends thereof are sealed by upper and lower end plates 27 and 28. Reference numeral 29 is a spring, and 30 is an anti-drain back valve.

Reference numeral 31 is an annular packing having a rectangular cross section,
It is arranged on the outer peripheral portion of the cover plate 22. It is also possible to apply an adhesive to the outer peripheral surface or the bottom surface of the annular packing 31 and fix it to the lid plate 22. Further, the outer diameter of the annular packing 31 may be the same as the inner diameter of the rising wall 25 of the lid plate 22 or may be a value slightly larger than that, and the ring packing 31 may be press-fitted on the upper surface of the lid plate 22.

FIG. 3 shows another embodiment in which the front end of the case 20 is horizontally extended to form a flat portion 32, and the flat portion is brought into contact with the upper surface of the cover plate 22. With the annular packing 31 attached, a part of the bottom surface of the annular packing 31 is placed on the flat portion 32. As shown in Figure 4,
It is possible to use an annular packing 31a in which a part of the bottom surface is cut out.

FIG. 5 shows still another embodiment, in which the tip of the case 20 is further extended and the tip is raised obliquely upward to form an annular concave wall 33. The annular packing 31b is mounted in the concave wall 33. As shown in FIG. 6, the annular packing 31b has a structure in which an annular flange 34 protruding toward the inner peripheral side is formed at the bottom.

In the embodiment shown in FIGS. 1, 3 and 5, the surface of the case 20a with which the annular packings abut is subjected to knurling or the like to form a roughened surface and the holding force of the pankin which presses. Can be increased. Further, the annular packings 31, 31a and 31b are the same as those shown in FIGS.
Can be applied to each.

The disposable oil filter of FIG. 1 is used by mounting the screw hole 23 of the cover plate 22 into a mounting pipe of a mounting mount (not shown). Oil is lid plate 2
The anti-drain back valve 30 is opened through the second through hole 24 and flows into the case 20. Furthermore, the oil is
Screw hole 2 of cover plate 22 passing through filter element 21
Outflow from 3. During this time, the oil is cleaned by the filter element 21.

[0017]

As described above, since the disposable oil filter of the present invention has the joining structure in which the end portion of the case is wound around the rising portion provided on the outer peripheral portion of the lid plate, the number of parts can be reduced and the manufacturing process can be improved. In addition, the pressure resistance is high despite the fact that it is a mechanical joint that does not have a welded structure.

Further, since the end portion of the case which is the receiving portion of the packing is formed to have a height dimension substantially equal to the height of the rising wall of the lid plate, the receiving portion having a desired dimension can be easily provided. .

[Brief description of drawings]

FIG. 1 is a partial sectional view of a disposable oil filter of the present invention.

FIG. 2 is a partially enlarged view of FIG.

FIG. 3 is a partially enlarged view showing another embodiment of the present invention.

FIG. 4 is a sectional view of an annular packing.

FIG. 5 is a partial sectional view showing still another embodiment of the present invention.

FIG. 6 is a sectional view of another annular packing.

FIG. 7 is a sectional view of a conventional oil filter.

FIG. 8 is a sectional view of a conventional oil filter.

[Explanation of symbols]

 20 case 21 filter element 22 lid plate 23 screw hole 25 rising wall 20a, 20b, 20c 1st, 2nd, 3rd end

Claims (1)

[Claims] 1. A cup-shaped case having an open upper end,
A cover plate with a filter element, a screw hole in the center, multiple through holes in the outer circumference, and a rising wall on the outer circumference covers the open end of the case and covers the upper end of the case. Wrap it around the outer wall of the rising wall of the plate, crimp the inner peripheral surface of the end of the case to the inner and outer peripheral surfaces of the rising wall, and crimp the end of the case to the lid plate receiving part at the lower end of the rising wall. Disposable oil filter.