JP2598214Y2 - Floating gasket - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a floating gasket which is used as one of measures against noise of an automobile engine and is used for sealing intake air, cooling water, lubricating oil and the like.

[0002]

2. Description of the Related Art Recently, engine noise has been reduced by using a cover on an intake manifold, an oil pan, etc. as a measure against noise of an automobile engine.
There is a problem that attaching such a cover makes the engine heavier and more expensive.

Further, as a measure against engine noise, the engine is divided into several blocks, and a high damping member (floating material) is provided at each connection portion to change the natural frequency of the engine system. The resonance point is controlled to reduce noise.

[0004] This floating gasket must have not only the damping ability but also the sealing property, and a beat portion is provided on the side facing the sealing surface, and sealing can be performed by the surface pressure secured by the beat portion.

In the above-mentioned conventional floating gasket, as shown in FIG. 3, a sheet-like gasket main body 11 forming a floating portion and a beat portion 12 forming a sealing portion are integrally formed by a rubber gasket member having a high damping ability. doing.

[0006]

[Problems to be Solved by the Invention] In order to ensure a sufficient floating function, it is necessary to use a soft material having a high damping capacity, that is, a soft material. The conventional floating gasket, in which the gasket body 11 forming the floating portion and the beat portion 12 forming the sealing portion are formed of the same material because of a large strain (set) and a large decrease in sealing surface pressure, has a sufficient vibration damping function and It is difficult to simultaneously obtain the sealing function.

[0007]

SUMMARY OF THE INVENTION According to the present invention, there is provided a floating gasket for an internal combustion engine.
In, the sheet-like gas constituting the floating part
The gasket body is made of a material with excellent damping
Compress the beads forming the sealing part of the
Floating gasket integrally formed of small material
That is,

[0008]

In a floating gasket used as a measure against engine noise, a material having excellent damping ability is used for a floating portion (seat body) and a material having a small compression set is used for a sealing portion (bead portion). Therefore, characteristics that are matched to individual engines can be effectively obtained because they are not affected by sealing properties.

Further, since the permanent compression set can be minimized even at the sealing portion, the surface pressure can be greatly improved.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the floating gasket of the present invention will be described with reference to the drawings. FIG. 1 is an enlarged cross-sectional view taken along the line II of the floating gasket shown in FIG. 2, and a member forming a floating portion composed of the sheet-like gasket main body 1 has a hardness of 10 to 15 with respect to the hardness of a conventionally used member. It is formed of silicone rubber having a hardness lower by%.
A bead portion on which silicon rubber having a hardness higher than that of the member of the sheet-shaped gasket main body 1 is printed on the both sides of the sheet-shaped gasket main body 1 by about 100 μm by a silk screen or the like or a punched-in one is pasted to form a seal portion. Form 2

In the above embodiment, the floating portion of the sheet-like gasket body and the sealing portion of the bead are formed of silicone rubber having different hardness. However, the present invention is not limited to this. Such rubber gasket members may be combined.

The floating gasket thus formed is mounted between the cylinder block 4 and the oil pan cover 5 as shown in FIG. 3 is a bolt hole,
6 is a bolt, 7 is a washer with rubber, and 8 is a collar with rubber.

[0013]

[Effect of the invention] This invention has the above-mentioned configuration.
Conventionally, both the sealing property and the vibration-proofing property have to be considered with one kind of floating member, and the vibration-proofing property has been impaired because the sealing property is emphasized. By imparting the sealing property to the sealing member, the same sealing property as that of the related art can be provided, and the anti-vibration property (−3 dB) higher than that of the related art can be obtained.

Further, in the present invention, since the floating portion and the sealing portion are formed of different materials, the material set for the floating portion does not depend on the sealing property, so that the characteristics matching each engine can be effectively achieved. Can be put out. Also, since the permanent compression set can be minimized even at the seal portion, the surface pressure can be greatly improved.

Further, conventionally, a mold had to be formed for integral molding. However, if a printing method using, for example, a silk screen is used, the production cost can be reduced.

[Brief description of the drawings]

FIG. 1 is an enlarged cross-sectional view of the floating gasket of the present invention shown in FIG.

FIG. 2 is a partial plan view of the floating gasket of the present invention.

FIG. 3 is an enlarged sectional view of a conventional floating gasket.

FIG. 4 is a cross-sectional view showing a mounting state of a floating gasket.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Sheet gasket main body (floating part) 2 Bead part (seal part) 3 Bolt hole 4 Cylinder block 5 Oil pan cover 6 Bolt 7 Washer with rubber 8 Rubber collar 11 Sheet gasket main body (floating part) 12 Beat part (seal) Part)

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-3-107767 (JP, A) Jikken 17-1163 (JP, Y1) (58) Fields investigated (Int. Cl. ⁶ , DB name) F16J 15/06-15/12 C09K 3/10 F02F 11/00

Claims (1)

(57) [Scope of request for utility model registration] 1. A floating gasket for an internal combustion engine.
The gasket that constitutes the floating part
The gasket is made of a material with excellent damping
Compression set of the bead part that constitutes the sealing part of the main body
Characterized by being integrally formed of small material
Ting gasket.