JPH077655Y2 - Floating mount gasket - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a floating mounting type gasket, and more particularly to a floating mounting type gasket for engaging an oil pan, a head cover and the like of an internal combustion engine by a floating mounting method.

[Conventional technology]

Gaskets include cylinder blocks and cylinder heads,
It is a deformable member used to prevent pressure leakage between members that need to be separated from each other, such as an oil pan and a cylinder block.

The gasket is made of natural rubber or synthetic rubber,
It is made of plant fibers such as cork and asbestos, and soft metallic materials such as lead and copper.

Further, the conventional gasket is formed separately from the grommet. When an oil pan is attached to a cylinder block using this gasket, as shown in FIGS. 5 to 7, the space between the mating surface of the cylinder block 102 and the upper surface of the mounting flange portion 108, which is the mating surface of the oil pan 104, is a The gasket 106 is interposed. Then, the grommet 118 having the bolt hole portion 124 is inserted from below into the mounting hole portion 112 provided in the gasket 106, the bolt 128 is inserted into the bolt hole portion 124 through the washer 126, and the cylinder block 102 is fastened and fixed. Was.

The grommet 118 is a protective ring that prevents the mounting flange portion 108 of the oil pan 104 from being deformed or damaged when the bolt 128 is tightened.

Furthermore, as a seal member for the transmission case,
As disclosed in Japanese Patent Publication No. 163574, a transmission member integrally formed with a seal member located at a mating portion of each split mold case and a seal portion located over an entire circumference in an opening formed over the split mold cases. There is a case seal member which is molded so that the entire shape in a free state is flat.

[Problems to be solved by the invention]

By the way, in the conventional gasket, the grommet for protecting the oil pan and the gasket are separately formed.

As a result, when the oil pan is attached to the cylinder block via the gasket, the grommet falls off, which requires a great deal of labor for the attachment work, which is disadvantageous in practical use.

Further, there is a disadvantage that the grommet is lost due to the falling off of the grommet and a spare part needs to be used, which is economically disadvantageous.

Furthermore, in order to prevent the loss of the grommet, it is necessary to use an adhesive or the like, which causes an increase in manufacturing cost and is disadvantageous in that it is economically disadvantageous.

[Purpose of device]

Therefore, in order to eliminate the above-mentioned inconvenience, the object of the present invention is to integrally provide a grommet at the outer peripheral edge portion of the gasket with a communicating member and to change the fitting shape at each fitting portion of the gasket and the grommet. By providing a fall-out prevention part that prevents the grommet from falling off, it is possible to prevent the grommet from falling off, improve the workability of the grommet mounting work, and prevent the loss of the grommet in advance. To realize.

[Means for solving problems]

In order to achieve this object, the present invention relates to a floating mounting type gasket which is interposed on a mating surface of a member requiring airtightness and watertightness, and a grommet is integrally provided at an outer peripheral edge portion of the gasket by a communicating member, and The gasket and the grommet are each fitted with a drop-out preventing portion for changing the fitting shape to prevent the grommet from falling off.

[Action]

With the above-described configuration, a gasket is provided on the mating surface when mounting the fixing member that requires airtightness and watertightness. Then, the fitting portion of the grommet, which is integrally provided by the connecting member at the outer peripheral edge portion of the gasket, is fitted to the fitting portion of the gasket by bending the connecting member.

At this time, a drop-out preventing portion that changes the fitting shape to prevent the gasket from falling off is provided at each fitting portion of the gasket and the grommet, and the grommet and the gasket are securely fitted to each other.

〔Example〕

An embodiment of the present invention will be described in detail below with reference to the drawings.

1 to 3 show an embodiment of this invention. First
3 to 3, 2 is a cylinder block, 4 is an oil pan, and 6 is a gasket. The gasket 6 is interposed between the lower surface 2a of the cylinder block 2 and the upper surface 8a of the mounting flange portion 8 provided on the oil pan 4. The gasket 6 is provided with an annular interposing portion 10, and a plurality of fitting hole portions 12 are formed at predetermined intervals so that the interposing portion 10 can be fitted with a fitting convex portion 20 of a grommet 18 described later. . A first taper portion 14 is formed on the inner periphery of the fitting hole portion 12 as a drop-out preventing portion whose inner diameter gradually decreases in the downward direction.

Further, a communication member 16 extending in the vertical direction or the horizontal direction of the interposition portion 10 is provided at the outer peripheral edge portion of the interposition portion 10 corresponding to the fitting hole portion 12, and a grommet is provided at an end portion of the communication member 16. 18
To provide.

At this time, when the gasket 6 and the grommet 18 are fitted, the communicating member 16 is formed to have a predetermined length or more so as to wrap around the peripheral portion of the mounting flange portion 8 of the oil pan 4 and fit from below. There is.

Further, the lower surface 18a of the grommet 18 is formed with a fitting projection 20 projecting downward. A second taper portion 22 is formed on the outer periphery of the fitting convex portion 20 as a drop-out prevention member whose outer diameter gradually increases in the downward direction and penetrates the fitting convex portion 20 in the vertical direction. Bolt holes 24 are formed.

That is, the fall-off preventing portion is formed by the first and second taper portions 14 and 22.

Reference numeral 26 is a washer, 28 is a bolt, and 30 is a bolt hole provided in the cylinder block 2.

Next, the operation will be described.

When mounting the cylinder block 2 and the oil pan 4 which are airtight and watertight fixing members, the gasket 6 is interposed between the lower surface 2a of the cylinder block 2 and the upper surface 8a of the mounting flange portion 8 of the oil pan 4. Interpose part 10.

Next, the fitting protrusion 20 of the grommet 18 provided by the connecting member 16 on the outer peripheral edge portion of the gasket 6 is fitted into the fitting hole 12 of the gasket 6 by bending the connecting member 16.

At this time, since the first taper portion 14 formed on the fitting hole portion 12 of the gasket 6 and the second taper portion 22 formed on the outer periphery of the fitting convex portion 20 of the grommet 18 have opposite inclinations, The grommets 18 and the gasket 6 are surely fitted to each other as resistance to prevent the grommets 18 from falling off.

This prevents the grommet 18 from falling off,
The grommet 18 can be easily attached, workability can be improved, and it is practically advantageous.

Further, since the grommet 18 is integrally provided on the outer peripheral edge portion of the gasket 6 by the communication member 16 to prevent the grommet 18 from falling off, it is possible to omit the use of an adhesive or the like which is conventionally used for preventing the grommet 18 from falling off. At the same time, it is possible to prevent the grommet from being lost due to the grommet 18 coming off.
Manufacturing cost can be reduced and it is economically advantageous.

The invention is not limited to the above-described embodiment, but various application modifications can be made.

For example, in the embodiment of the present invention, the fall-off preventing portion is formed by the first and second taper portions, but as shown in FIG. 4, the outer peripheral end portion 20 of the fitting convex portion 20 formed on the grommet 18 is formed.
It is also possible to provide a bulge 42 on a and use the bulge 42 and the first taper portion to form a fall prevention portion.

In the embodiment of the present invention, the gasket provided between the cylinder block and the oil pan is provided with a fall-preventing portion, but a gasket used between other members, for example, between the cylinder head and the cylinder head cover. It is also possible to use a gasket or the like that is used for forming a drop-out preventing portion.

[Effect of device]

As described above in detail, according to the present invention, the grommet is integrally provided on the outer peripheral edge portion of the gasket by the communicating member, and the fitting shapes are changed at the respective fitting portions of the gasket and the grommet. Since the drop-off preventing portion for preventing the drop-off of the grommet is provided, the grommet can be prevented from falling off, the grommet can be easily attached, and the workability can be improved, which is practically advantageous. Further, since the grommet is integrally provided on the outer peripheral edge portion of the gasket by the communication member to prevent the grommet from falling off, it is possible to prevent the grommet from being lost due to the grommet falling off, which can reduce the manufacturing cost and is economical. Is advantageous to.

[Brief description of drawings]

1 to 3 show an embodiment of the present invention, FIG. 1 is a schematic perspective view of a gasket, FIG. 2 is a schematic sectional view of the gasket,
FIG. 3 is an explanatory view of attaching the gasket. FIG. 4 is an enlarged cross section of the essential part of a gasket showing another embodiment of the present invention. FIGS. 5 to 7 are explanatory views of gasket mounting showing a conventional gasket. In the figure, 2 is a cylinder block, 4 is an oil pan,
6 is a gasket, 8 is a mounting flange portion, 10 is an interposed portion,
12 is a fitting hole portion, 14 is a first tapered portion, 16 is a communicating member, 18 is a grommet, 20 is a fitting convex portion, 22 is a second tapered portion, 24 is a bolt hole portion, 26 is a washer, 28 is a bolt. , 30 are bolt holes.

Claims (1)

[Scope of utility model registration request] 1. A floating mounting type gasket which is interposed on a mating surface of a member requiring airtightness and watertightness, and a grommet is integrally provided on an outer peripheral edge portion of the gasket by a communicating member, and each of the gasket and the grommet is provided. Floating mount type gasket, characterized in that a fitting prevention part is provided at the fitting part to change the fitting shape to prevent the grommet from falling off.