JPS5827164Y2 - Grommet processing gasket - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improved grommet-processed gas kent applied to gas kents, particularly cylinder hend gas kents, etc.

Traditionally, common gas cylinder cylinder cylinders are used under high-temperature, high-pressure load conditions, and are also used in locations where multiple bores are closely spaced for fluid flow. A gasket is a gasket in which a grommet is processed using a thin metal plate such as steel or copper on the periphery of an opening formed in a gasket member corresponding to the bore of the gasket.

However, due to the recent demands for higher output and lighter weight of internal combustion engines, as well as for cleaner exhaust gas, the application of aluminum cylinder heads and cylinder blocks is becoming more and more important. Complete combustion caused the temperature to rise.

For this reason, especially the portions intervening between the bores (hereinafter referred to as
Thermal stress is concentrated in this area, which is called the bore adjacent spacing. For example, in the aforementioned internal combustion engine with an aluminum head and block, during operation, the mutual spacing between the joint surfaces of the head and block is approximately 0.1 It exhibits thermal expansion close to 0.3 mm, and is subjected to periodic thermal stress that returns to its original state when it is at rest.

Due to this thermal stress, the grommeted part of the gas kent sandwiched between both joint surfaces is deformed from a predetermined bent shape to a shape that protrudes inward of the opening and is spaced apart from the gas kent member, resulting in a sealing effect. However, it has the disadvantage that it deteriorates the flow of fluid and impedes normal fluid flow.

SUMMARY OF THE INVENTION Therefore, the object of the present invention is to eliminate the above-mentioned drawbacks, and to provide a gasket for maintaining a predetermined bent shape of a grommet-processed thin metal plate in a narrow space adjacent to a bore, such as in a cylinder-hand gasket of an internal combustion engine. Our goal is to provide the following.

Another object of the present invention is to provide a gasket that can reliably maintain a predetermined grommet processing shape without using special members or processing techniques.

Embodiments of the present invention will be described below with reference to the drawings.

FIGS. 1 and 2 show a portion of a gasket G according to an embodiment of the present invention, which extends in the vicinity of mutually adjacent openings O provided corresponding to bores B (FIG. 2) for fluid flow. P (hereinafter, this will be referred to as the opening adjacent interval portion P).

) is a diagram showing a plane and a cross-sectional shape, respectively.

Gasket G includes a sheet-like gasket member 1 having a planar shape corresponding to an applicable joint surface F (FIG. 2) and having at least two adjacent openings O for fluid flow, and one side of the gasket member 1. A grommet member 2 is provided as a grommet member so as to pass through the inner peripheral edge of each opening O and extend toward the flat surface side, and a grommet member 2 is inserted between the gas kent member 1 and the grommet member 2 on the other surface side of the gas kent member. It also includes a thin plate member 3 fixed to the grommet member 2 by welding, adhesion, or other means.

The thin plate member 3 is formed of a metal thin plate made of iron, steel, copper, etc., like the grommet member 2, but its thickness is determined by the thickness of the intervening portion of the thin plate member 3 at the periphery of the opening of the created gas kent. A plate material that is sufficiently thin should be used to avoid unbalance of the desired surface pressure during assembly due to the thickness being larger than the wall thickness of the part.

However, for reasons that will become clear later, making the wall thickness of the thin plate member 3 too thin tends to cause damage to the gasket member during bond formation and lack of mechanical strength against deformation due to thermal stress. Experiments have shown that when the thin plate member 3 is a steel plate, it is approximately 0. The thickness is 01 to 0.11 mm, and in the case of copper plates, it is slightly thicker, about 0.1 mm.
It has been found that it is preferable to select a thickness of 0.02 to 0.13 mm.

In addition, as shown in FIG. 2, the planar shape of the thin plate member 3 is a portion connecting the two adjacent portions including the closest portion of the outer periphery of the adjacent opening O, that is, the opening adjacent interval portion P. The extending grommet member 2 may have any shape as long as it can be interposed between the mutually spaced outer peripheral edges 2a, for example a thin plate member in the shape of an elongated quadrilateral as shown in FIG. 3a can also be applied.

However, it is preferable to form the thin plate member 3 with a planar shape similar to the opening adjacent interval portion P in order to achieve a reliable connection between the extended outer peripheral edge portions 2a of the grommet member 20.

The gasket G according to the present invention formed as described above is used by being fixed in a predetermined position between the applicable joining surfaces F by a fastening means such as a bolt (not shown), as shown in the cross-sectional shape in FIG. be done.

At this time, the aforementioned concentration of heat load on the space adjacent to the bore and thermal stress due to diffusion or cooling is similarly concentrated on the space P adjacent to the opening of the gasket G.

However, with the help of the thin plate member 3, the grommet member 2 substantially integrally surrounds the gasket member 1 in the gap portion P adjacent to the opening as a whole.

Therefore, when subjected to thermal stress, especially thermal expansion, the dimensional deformation of the grommet member 2 and the thin plate member 30 becomes intrusion into the gasket member 1 disposed inside thereof, and similarly, due to thermal contraction. The deformation results in separation from the Gaskent member 1.

Here, the gasket member 1 has heat resistance, sealing properties, etc. for the purpose of sealing, and also necessarily has compressive properties, so that it can fully accept the deformation due to the above-mentioned thermal stress and always maintain the desired state. Note that the grommet member can be maintained.

4 and 5 are views showing another embodiment according to the present invention, in which the application of the thin plate member described in the previous embodiment is eliminated, and the outer peripheral edge extension shape of the grommet member in the space adjacent to the opening is appropriately shaped. This selection likewise avoids undesirable deformation of the grommet member due to thermal stress.

In this embodiment, the grommet member 2 is formed such that its peripheral edge portions 2b or 2c extending from one side to the other side of the gasket member 1 are adjacent to each other at least between the closest portions of adjacent openings. (see FIGS. 4a and 5a) or formed so as to overlap each other (see FIGS. 4 and 5).

Both peripheral ends 2b or 2c of the adjacent or overlapping grommet members 20 are substantially integrated, likewise by welding, gluing or other suitable mechanical coupling means, to open the grommet member 2 having an annular cross-sectional configuration. Formed at adjacent intervals.

This makes it possible to avoid the need for a grommet member and mechanical deformation that may impede fluid flow due to thermal stress similar to that described in the previous embodiment.

As described above, according to the present invention, the grommet member extending to the portion adjacent to the opening connects the outer peripheral edge portions and is formed into a substantially integral annular cross-sectional shape. Grommet processing that can prevent the grommet member from deviating from the desired deformed shape in the space adjacent to the opening where stress is applied, maintains smooth flow of fluid, prevents deterioration of the sealing characteristics of Gaskent itself, and has high durability. This allows you to create Gaskent.

In addition, by applying the thin plate member, it is possible to easily obtain an excellent grommet-processed gasket without making unnecessary changes such as changes in dimensional specifications in the conventional grommet-processed gasket manufacturing process.

Furthermore, by forming the extended outer peripheral edges of the grommet members so as to be adjacent to each other or to overlap and be integrated, the component structure is the same as that of the conventional one.

It is extremely practical and useful as it can reliably prevent damage caused by thermal stress.

[Brief explanation of drawings]

Fig. 1 is a plan view showing an embodiment of the present invention, Fig. 2 is a view similar to the one shown in Fig. 1 in an assembled state, taken along the line Figures 4a and b are partial plan views showing another embodiment of the invention, respectively; Figures 5a and b are V-V of Figures 4a and b; FIG. 3 is a partial cross-sectional view along each line; 1... Gasket member, 2... Grommet member, 3... Thin plate member, G... Gasket, O... Opening, P.・・・・・・Aperture adjacent interval part.

Claims (3)

[Scope of utility model registration request] (1) A Gaskent member having a planar shape corresponding to the applied joint surface and having at least two adjacent openings, and extending from one side of the Gaskent member through the inner periphery of each of the openings to the other side. a grommet member that is grommet-processed so that A grommet-processed gas kent characterized in that the grommet is applied to at least the space adjacent to the opening on the other surface side of the gas kent member. (2) The integrating means is driven by thin plate members that are inserted between both distraction peripheral ends of the grommet member and the gasket member and are respectively fixed to the grommet member. A grommet-processed gas kent according to claim 1 of the utility model registration claim. (3) The integrating means is carried out by the extending ends of the grommet member toward the other side of the gasket member adjoining or overlapping each other and fixing the adjacent or overlapping extending ends to each other. A grommet-processed gas kent according to claim 1 of the utility model registration claim, characterized in that: