JPS5931295Y2 - Fluid filter gasket retention structure - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a gasket holding structure for a fluid filter.

BACKGROUND ART Gaskets are used to maintain airtightness and liquidtightness when attaching screw-in indexable fluid filters such as oil filters and fuel filters to internal combustion engines.

Conventionally, there have been disadvantages in that when an oil filter is attached to an internal combustion engine, the gasket is twisted, causing oil leakage, and when the oil filter is removed from the internal combustion engine, the gasket is detached from the oil filter.

The purpose of the present invention is to eliminate these conventional drawbacks, and to enable correct installation of a liquid filter, such as an oil filter, without causing distortion to the gasket when installing it in an internal combustion engine.
Another object of the present invention is to provide the fluid filter with a gasket holding structure that allows the oil filter to be removed with the gasket always attached to the oil filter when the oil filter is removed from the internal combustion engine.

With reference to the drawings, a conventional gasket holding mechanism and a gasket holding mechanism of the present invention will be described.

In the throw-away type oil filter shown in Fig. 1, the oil filter is attached using a screw 1a provided on the plate 1.
Attach the oil filter to the internal combustion engine using the

Holding plate 2 for holding sealing gasket 3
The oil filter mounting is fixed to the plate 1 by welding or caulking.

The gasket 3 is fitted into the groove of the holding plate 2.

A case 4 for accommodating the p week off 5 is tightly wound around the outer periphery of the gasket holding plate 2.

A spring 6 is provided at the lower part of the overflow body 5, and a check valve 7 is provided at the upper part of the overflow body 5.

As shown in FIG. 2, the conventional indexable oil filter has a flange portion 2 inside a gasket holding plate 2
A can be tilted outward over the entire circumference or in several places, and the gasket 3 can be held by pressing against the bottom or side surface of the groove 2b, or
Alternatively, as shown in FIG. 3, the flange portion 2a of the gasket holding plate 2 is made to stand upright, and the gasket 3 is held only by fitting using this as a guide, or the gasket 3 is provided with a holding portion 3a as shown in FIG. Flange part 2
I have been holding it by fitting it into a.

In the method shown in FIG. 2 above, when installing the oil filter to an internal combustion engine, the gasket 3 is
Therefore, the force socket 3 is installed in a twisted manner, which may cause oil leakage, and additional work is required to push the gasket 3 into the holding plate 2.

Furthermore, in the method shown in FIG. 3, when the oil filter is removed from the internal combustion engine, the gasket 3 may become stuck to the internal combustion engine and come off from the oil filter.

Therefore, when replacing a new oil filter with an internal combustion engine, an extra work is required to remove the stuck gasket, resulting in poor serviceability.

Further, in the case of FIG. 4, if the gasket 3 is stuck to the internal combustion engine side, there is a drawback that it comes off from the oil filter and remains on the internal combustion engine side.

In the implementation IPIJ of the present invention shown in FIG. 5, an acute angle part 3b is formed at the lower inner circumference of the ring-shaped gasket 3, and the inner wall flange part 2a of the gasket holding plate 2 is inclined to match the slope of the acute angle part 3b to form the groove. 2b and the bottom of the gasket holding plate 2.
The width of the groove 2b is determined so as to form a constant gap 8 between the outer wall of the groove 2b and the outer peripheral surface of the gasket 3.

With this configuration, when installing the oil filter to an internal combustion engine while rotating, the gasket 3 can freely slide in the radial direction within the holding groove 2b of the gasket holding plate 2, so the gasket 3 will not be twisted. It can be naturally compressed to improve its sealing properties.

Further, even if the gasket 3 is stuck to the internal combustion engine side when removing the oil filter, the gasket 3 does not come off from the gasket holding plate 2 of the oil filter due to the inclined flange part 2a, and the gasket remains on the oil filter.

Also, when installing the oil filter to an internal combustion engine while rotating it, the gasket 3 is inserted into the groove 2b of the gasket holding plate 2.
gasket 3 due to the presence of gap 8.
slides freely within the groove 2b and is naturally compressed without twisting, resulting in the state shown in FIG.

That is, the gasket 3 is compressed between the gasket holding plate 2 and the filter mounting portion 9 on the internal combustion engine side.

A gap is formed between the outer peripheral surface of the gasket 3 and the outer wall of the groove 2b of the gasket holding plate 2.

In this way, the gasket can sufficiently retain its sealing function.

In the embodiment of the present invention shown in FIG. 6, the gasket 3 is provided with a string-like portion 3c which comes into contact with the inclined flange portion 2a to achieve the same effect as the embodiment shown in FIG.

Of course, a gap 8 is provided between the back of the gasket 3 and the groove 2b of the gasket holding plate 2.

[Brief explanation of the drawing]

Figure 1 is a vertical cross-sectional view of the indexable oil filter.
2, 3, and 4 are longitudinal cross-sectional views of a portion of a conventional gasket holding structure, respectively; FIG. 5 and FIG. 6 are longitudinal cross-sectional views of a portion of a gasket holding structure of the present invention, and FIG.
The figure is a longitudinal sectional view of a portion of the gasket retaining structure of the present invention installed in an internal combustion engine. 1...Oil filter mounting plate, 2...
...Gasket holding plate, 2b...Groove, 3...Gasket, 4...Case,
5...Zaiweektai, 6...Spring, 7
...Check valve, 7'...Check valve retaining spring, 8...Gap, 9...Filter mounting part for internal combustion engine, 2a... ...Flange part, 2c...
...Acute corner, 3a...Holding part, 3b...
...acute angle part, 3c...string-like part.

Claims (1)

[Scope of utility model registration request] It includes a gasket holding plate 2 having a groove 2b for accommodating a ring-shaped gasket 3 having an acute angle part 3b or a string-like part 3C at the lower part of the inner circumference, and the inner circumference flange part 2a of the groove 2b is connected to the inner circumference of the groove 2b. An acute corner 2c is formed between the groove 2c and the bottom, and when the acute corner or string-like part of the gasket is inserted into the acute corner, a certain gap is formed between the outer wall of the groove 2b and the outer peripheral surface of the gasket. 8, and the width of the groove 2b is set so as to form a gap between the outer peripheral surface of the gasket 3 and the outer wall of the groove 2b of the gasket holding plate 2 when the gasket 3 is attached to the filter attachment part 9 of the internal combustion engine. A gasket holding structure for a fluid filter characterized by the following: