JP3318445B2 - 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 gasket, and more particularly to a gasket effective for a filter of a transmission or the like.

[0002]

2. Description of the Related Art Generally, an oil filter is mounted on a transmission or the like of an automobile, and a lubricating oil circulating in the transmission is filtered to remove foreign substances such as metal powder contained therein, thereby removing foreign substances. By causing the lubricating oil that is not included to act on the rotating part, the sliding part, and the like, wear of the rotating part and the like is prevented.

Various types of oil filters having such a function have been proposed, for example, those shown in FIGS. 8 and 9 are already known. That is, the oil filter 8 is mounted on a case 9 made of a resin or the like in which a lubricating oil passage 9b communicating from the upper surface to the side surface is formed, and the upper surface opening of the case 9 is closed so as to be closed. A mesh filter 10 made of stainless steel or the like, which is mounted on a lubricating oil flow path of an automobile transmission or the like, and the lubricating oil flowing through the flow path is filtered by the filter 10. Thus, foreign matter such as metal powder contained in the lubricating oil is removed.

[0004] The oil filter 8 is provided in FIG.
(A) ~ via an annular gasket 21, 22, 23 and 24 made of an elastic body having a cross-sectional shape as shown in (d) is attached to the flow path, each gasket 21, 22,
23 and 24 are sandwiched between the flange portion 9a of the case 9 of the oil filter 8 and the wall surface of the flow path (not shown), and are compressed by a predetermined amount to seal between them, so that the lubricating oil in the flow path leaks outside. Is prevented.

In this case, the gap between the wall surface of the flow passage and the flange portion 9a of the case 9 varies. 21, 22, 23 and 24 need to be highly compressed.

However, in the gaskets 21, 22, 23, and 24 having the above-described cross-sectional shapes, cracks and the like may occur when the gaskets are compressed at a high compression rate. And good sealing properties cannot be obtained.

On the other hand, in order to obtain a high compression state, FIG.
Although it is conceivable to use an annular gasket 25 made of an elastic body having a cross-sectional shape as shown in (a) , cracks and the like occur in the gasket 25 having such a cross-sectional shape even in a high compression state. Although there is no danger, when a gap is formed between the wall surface 7 of the flow path 6 and the case 9 of the oil filter 8, for example, one lip portion 25a is inserted into the gap.
The lip portion 25a may protrude from the mounting portion depending on the mounting direction (see FIG. 11 (b)) or the like, depending on the mounting direction (see FIG. 11 (c)). It cannot be maintained in the long term.

The present invention solves the above-mentioned problems of the prior art, and does not cause cracks or the like even in a high compression state, and maintains a high sealing property for a long period of time. It is intended to provide a gasket that can be used.

[0009]

Means for Solving the Problems In order to solve the above problems, the present invention provides a method in which one member and the other member are provided.
A gasket made of an elastic body that is mounted and sandwiched between the two members to seal between the two members, wherein the gasket is in contact with the annular main body and the one member of the main body. An annular step provided over at least one portion of the surface and the contact surface with the other member and extending over the entire periphery thereof, and at least one annular protrusion connected to the step , Of the surface connected to the step of the predetermined angle
A means formed on a tapered surface is employed.

[0010]

According to the present invention, by adopting the above-mentioned means, when the member is mounted between one member and the other member and is sandwiched between the two members, the protrusion is first compressed and the protrusion is compressed. After the compression is performed, the main body is compressed. In this case, the step portion is connected to the protrusion, and the surface connected to the step portion of the protrusion is an appropriate tapered surface, so that when a compressive force due to tightening acts on the top of the protrusion, The projecting portion is compressed by the component force so as to be crushed in the direction of the step located on the side opposite to the tapered surface.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention shown in the drawings will be described below. 1 to 6 show a first embodiment of a gasket according to the present invention. FIG. 1 is a plan view showing the whole, and FIG. 2 (a) is a sectional view taken along line AA of FIG. FIG. 2B is a sectional view taken along the line BB of FIG.
FIG. 3C is a cross-sectional view taken along the line CC of FIG. 1, and FIG.
4 is a side view of the thing shown in FIG. 3, FIG. 5 is a partially enlarged view of the thing shown in FIG. 3, and FIG. 6 is a bottom view of FIG.

That is, the gasket 1 shown in this embodiment
Is made of an elastic material such as rubber which is mounted between one member and the other member and is sandwiched between the two members to seal between the two members, and has a cross section. An annular main body 2 having a rectangular shape is provided at at least one position (two positions in this embodiment) of a contact surface with one member and a contact surface with the other member of the main body 2, and has an entire circumference thereof. , And an annular protrusion 4 having a smaller cross-sectional area than the main body 2 connected to the steps 3 and 3.

The main body 2 has a square cross section and a pair of long sides 2a, 2a facing each other at a predetermined interval.
a and a pair of short sides 2b having a rectangular cross section for integrally connecting between one end and the other end of the long sides 2a, 2a;
On the inner surface side of one long side portion 2a, projections 5, 5, 5 having a semicircular cross section are integrally provided at three places.

The steps 3, 3 have a square shape provided at an appropriate depth at both corners of the contact surface with one member of the main body 2 and at both corners of the contact surface with the other member. The protrusions 4 are provided between the steps 3.

The projection 4 has a substantially trapezoidal cross section, and a surface 4a continuous with the step 3 on the outer peripheral side is formed perpendicular to the bottom surface of the step 3, and the step 4 on the inner peripheral side. The surface 4b connected to the portion 3 is formed as a tapered surface inclined at a predetermined angle with respect to the bottom surface of the step portion 3 (a tapered surface inclined from the outer periphery to the inner periphery).

Then, the gasket 1 constructed as described above is used as one of the members of the automobile transmission 20.
And a wall 9 of a lubricating oil flow path 6 and a case 9 of an oil filter 8 which is the other member mounted in the middle of the flow path 6.
First, as shown in FIGS. 5 and 6, the gasket 1 is mounted on a case 9 made of resin or the like of the oil filter 8 and, in this state, the case 9 of the oil filter 8 is placed. Is inserted into the wall surface 7 of the flow channel 6, and the space between the flange portion 9 a of the case 9 and the wall surface 7 of the flow channel 6 is tightened with a bolt or the like (not shown). Hold the gasket 1.

Here, the gasket 1 is composed of a main body 2 having a square or rectangular cross section and a substantially trapezoidal protrusion 4 having a smaller cross-sectional area than the main body 2. The part 4 is compressed before the main body 2, and thereafter the main body 2 is compressed by a predetermined amount.

Therefore, a high compression state can be obtained only by deformation of the projection 4, and the crushing allowance of the main body 2 can be set to a value that does not cause cracking or the like. Character will be obtained.

Steps 3 are connected to the protrusion 4, and a surface 4b connected to the step 3 on the inner peripheral side of the protrusion 4 is formed as a tapered surface having a predetermined angle. Therefore, when a compressive force due to tightening acts on the top of the projection 4, the projection 4 is compressed by the component force so as to be crushed in the direction of the step 3 on the outer peripheral side.

Therefore, wrinkles and the like do not occur on the contact surface of the main body 2 with one member and the contact surface with the other member at the time of compression, and a good sealing property can be obtained.

Further, even if the surface roughness of the case 9 of the oil filter 8 and the wall surface 7 of the flow path 6 varies, the easily deformable projections 4 uniformly contact the mating member. Unaffected by roughness variations,
Good sealing properties are always obtained.

The projections 5, 5, and 5 are provided on the inner surface of one long side 2a of the main body 2 to prevent the gasket 1 from falling off when the oil filter 8 is mounted on the case 9. This makes it extremely easy to mount the oil filter 8 and the gasket 1 on the wall surface 7 of the flow path 6.

In this embodiment, the gasket 1 is mounted between the flange portion 9a of the case 9 of the oil filter 8 and the wall surface 7 of the lubricating oil flow path 6 of the transmission 20 of an automobile. The gasket 1 is not limited to
May be used, and in this case, the same effects as those described above can be obtained.

[0024]

[0025]

[0026]

[0027]

FIG . 7 shows a gasket according to the present invention .
The gasket 16 according to the second embodiment has a circular cross section of the main body 17 and a gasket 16 according to the second embodiment.
At least one (two in this embodiment) of the contact surface with one member and the contact surface with the other member of the main body 17 is provided with annular steps 18 over its entire circumference. A cross-section is substantially trapezoidal and an annular projection 19 is provided between the steps 18, 18, and the other configuration is the same as that shown in the first embodiment. The detailed description thereof will be omitted.

In this embodiment, the same operation and effect as those of the first embodiment are exhibited, and one of the members, ie, the transmission 20 of the automobile, is used.
(See FIGS. 3 and 4) Wall surface 7 of flow path 6 for lubricating oil
And the oil filter 8, which is the other member mounted in the middle of the flow path 6, and is sandwiched between the two, the projections 19, 19 are compressed first, and the projections 19, 19 are compressed. , 19 are compressed, the main body 17 is compressed.

Therefore, a high compression state can be obtained only by deformation of the projections 19, 19, and the crushing allowance of the main body 17 can be set to a value that does not cause cracking or the like. Can be maintained.

Further, the projections 19 are provided with the steps 18, 18, and the surface connected to the step 18 on the inner peripheral side of the projection 19 is formed as a tapered surface having a predetermined angle. When a compressive force due to tightening acts on the top of the projection 19, the projection 19 is compressed and deformed by the component force so as to be crushed in the direction of the step 18 on the outer peripheral side.

Therefore, there is no possibility that wrinkles or the like are formed on the contact surface of the main body portion 17 with one member and the contact surface with the other member to deteriorate the sealing property, and a good sealing property is obtained. .

Further, even if the surface roughness of the case 9 of the oil filter 8 and the wall surface 7 of the flow path 6 varies, the projections 19 and 19 come into contact with the mating member uniformly. Unaffected by roughness variations,
Good sealing properties are always obtained.

In each of the above embodiments, the cross sections of the main bodies 2, 12, and 17 are circular and square, and the cross sections of the protrusions 4, 14, and 19 are substantially trapezoidal and square.
The present invention is not limited to this, and other shapes may be used. The point is that the cross-sectional area of the protrusions 4, 14, 19 is made smaller than the cross-sectional area of the main body 2, 12, 17 and the protrusions are formed. 4,1
What is necessary is just to make it possible to obtain a high compression state by the deformation of 4 and 19.

In each of the above embodiments, two steps 3, 13, 18 and one projection are provided on the contact surfaces of the main bodies 2, 12, 17 with one member and the contact surface with the other member. Although the parts 4, 14, and 19 are provided, the invention is not limited thereto, and one or more steps 3, 13, 18, and two or more protrusions 4, 14, 19 may be provided. In this case, the same operation and effect as those of the above embodiments can be obtained.

[0036]

According to the present invention, the present invention is constituted as in claim 1.
Thereby , the following effects can be obtained. That is, one
When it is mounted and clamped between one member and the other member
First, the protrusions are compressed first, and then the body is compressed.
The amount of compression of the main body is less than that of the protrusion.
Can be done. In this case, the step of the protrusion
Is formed as a tapered surface with a predetermined angle.
When a compressive force is applied to the top of the projection by tightening
The protrusion is provided on the opposite side of the tapered surface due to the component force.
To be crushed in the direction of the shoulder
become. Therefore, a high compression state can be obtained only by deformation of the protrusion.
And there is no danger of the crushing of the main body
Value with one member of the main body.
Wrinkles or the like may be formed on the contact surface and the contact surface with the other
Good sealing performance without impairing
It will be obtained in the long term. In addition, two parts mounting
Even if the surface roughness of the
Since it will contact the mating member evenly,
Always have a good seat without being affected by
Characteristics can be obtained.

[0037]

[0038]

[0039]

[Brief description of the drawings]

FIG. 1 is a plan view showing a first embodiment of a gasket according to the present invention.

FIG. 2A is a cross-sectional view taken along the line AA of FIG.
2B is a sectional view taken along line BB of FIG. 1, and FIG. 2C is a sectional view taken along line CC of FIG. 1.

FIG. 3 is an overall view showing a mounted state of the one shown in FIG. 1;

FIG. 4 is a side view of the one shown in FIG. 3;

FIG. 5 is a partially enlarged view of what is shown in FIG.

FIG. 6 is a bottom view of what is shown in FIG.

FIG. 7 is a sectional view showing a second embodiment of the gasket according to the present invention.

FIG. 8 shows an oil fill used conventionally and in this embodiment .
FIG.

FIG. 9 is a front view of what is shown in FIG.

FIG. 10 is a sectional view showing an example of a conventional gasket.
(A) has a circular cross section, and (b) has an elliptical cross section.
Shape, (c) is a square cross section, (d) is
One side of a square cross section is formed on the round surface
Things.

FIG. 11 is a sectional view showing another example of a conventional gasket.
Yes, (a) is a cross-sectional view, (b) is a cross-section showing the mounted state
FIG. 3C is a cross-sectional view showing the mounted state.

[Explanation of symbols]

1, 16, 21, 22, 23, 24, 25 ... gasket 2, 17 ... body 2a ... long side 2b ... short side 3, 18, ... step 4, 19 ... projection 4a 4b Surface 5 Projection 6 Flow path 7 Wall 8 Oil filter 9 Case 9a Flange 9b Passage 10 Filter 20 Transmission 25a Lip

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-59-141163 (JP, U) JP-A-5-42671 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) F16J 15/10

Claims (1)

(57) [Claims] 1. A gasket made of an elastic body which is mounted between one member and the other member and is sandwiched between the two members to seal between the two members. A main body to be formed; an annular step provided over at least one of a contact surface of the main body with the one member and a contact surface of the main member with the other member; At least one annular protrusion to be provided,
A surface connected to the step portion of the protrusion is a taper surface having a predetermined angle.
A gasket characterized in that the gasket is formed .