JP2007247825A - Seal ring - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a seal ring free from sealing performance degradation even when irregularities or damages exist on the surface of at least one of two members which contact the seal ring. <P>SOLUTION: The seal ring formed of an elastic material is provided for sealing a gap between the two members. It comprises annular seal protrusions provided on both sides of the face of the seal ring which contacts at least one member. It has a plurality of bridges for connecting the seal protrusions to each other. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

The present invention relates to a seal ring.
The present invention also relates to a seal ring useful as a seal ring for sealing between two members.
Furthermore, the present invention relates to a seal ring that prevents leakage between fixed members and leakage between relative members that rotate, swing and reciprocate.
Furthermore, the present invention is effectively used for E / G oil pumps, water pumps, ATs and the like.
In particular, the present invention relates to a seal ring that seals a gap between a resin cover and a metal housing, a gap between the metal cover and the resin housing, and a gap between the metal cover and the metal housing.
Preferably, the present invention is effectively used between two fixed members made of a casting.

Conventionally, a seal ring 300 shown in FIG. 3 is known.
This kind of seal ring 300 is arranged in a slightly compressed state in order to seal between the two members 1 and 2. This kind of seal ring has a 0-ring shape and is made of a rubber-like elastic material.
Further, a seal ring 400 shown in FIG. 4 is known.
This kind of seal ring 400 is different from the seal ring 300 shown in FIG. 3 in that the cross-sectional shape is a quadrangle.

Further, conventionally, a seal ring shown in FIG. 5 is known.
This kind of seal ring is an elastic seal ring 500 that is disposed between the two members 1 and 2 and seals the gap between the two members 1 and 2, and is a double-sided surface that contacts the two members 1 and 2 of the seal ring 500. A seal ring having four annular seal protrusions 4, 5, 6, 7 is disposed on both sides of the seal ring.
JP 2003-97720 A

However, in the conventional seal ring 300 shown in FIG. 3 described above, there is a problem that leakage occurs from this portion when irregularities or scratches 10 are present on the surfaces of the two members 1 and 2 in contact with the seal ring 300. .
In particular, when the two members 1 and 2 are made of a casting, such a problem occurs because the casting nest exists beyond the area of the contact surface between the seal ring 300 and the two members 1 and 2. Was remarkable.
In order to solve the problems of the conventional seal ring 300 shown in FIG. 3, a seal ring 400 having a ring-shaped cross section shown in FIG. 4 is known.
Since this type of seal ring 400 has a larger area in contact with the two members 1 and 2 compared to the conventional seal ring 300 shown in FIG. 3, even if there are some irregularities or scratches 10, the seal ring 400 is less likely to exist beyond the region of the contact surface between the two members 1 and 2, and good results were obtained for unevenness and scratches 10 compared to the conventional seal ring 300 shown in FIG. .
However, since this kind of seal ring 400 has an angular ring shape in cross section, the insertion resistance is much larger than that of the conventional seal ring 300 shown in FIG. 3, and the contact between the seal ring 400 and the two members 1 and 2 is great. Since the area is large, the two members 1 and 2 are deformed, and a good seal surface pressure cannot be obtained, resulting in a problem of leakage.

Therefore, in order to improve the drawbacks of the conventional seal ring shown in FIGS. 3 and 4, the seal ring shown in FIG. 5 has been proposed.
However, in the conventional seal ring 500 shown in FIG. 5 described above, when unevenness or scratches 10 and 10 are present on one member 1 in contact with the two seal projections 4 and 5 on both sides, There was a problem that leakage occurred through a single sealed space 900 surrounded by the seal protrusions 4 and 5.

  The present invention has been made in view of such a problem, and provides a seal ring that can maintain good sealing performance even if there are irregularities or scratches on the surface of two members in contact with the seal ring. Objective.

Another object of the present invention is to provide a seal ring in which the insertion resistance of the seal ring is kept low while maintaining good sealing performance.
It is another object of the present invention to provide a seal ring that does not impair the sealing performance even if there are irregularities or scratches on one member in contact with each of the two seal protrusions 4 and 5.
Another object of the present invention is to provide a seal ring in which the insertion resistance of the seal ring is reduced without reducing the sealing performance of the seal ring.
Furthermore, the target sealing fluid of the present invention varies depending on the place where air, water, dust, E / G oil, LLC, ATF, etc. are used.

  The seal ring of the present invention is an elastic seal ring that is disposed between two members and seals a gap between the two members, and has an annular seal on both sides of a surface of the seal ring that contacts at least one of the members. In the seal ring provided with protrusions, a space surrounded by the seal protrusion, the one member, and the bridge is a sealed space by providing a plurality of bridges for connecting the seal protrusions. To do.

  According to the seal ring of the present invention, the seal ring is made of a rubber-like elastic material, so that good and stable sealing performance can be exhibited.

  According to the seal ring of the present invention, since the height of the bridge is the same as the height of the seal protrusion, good sealing performance can be ensured.

  According to the seal ring of the present invention, since the seal protrusion is formed of an inclined surface, the insertion resistance when the seal ring is disposed between the two members can be kept low.

  According to the seal ring of the present invention, since at least one member of the two members is manufactured by casting, good sealing performance can be ensured even if there are many nests by casting.

The present invention has the following effects.
According to the seal ring of the first aspect of the present invention, it is an object to provide a seal ring that does not impair the sealing performance even if irregularities or scratches are present on the surface of at least one of the two members in contact with the seal ring. And
Moreover, according to the seal ring of invention of Claim 2, favorable and stable sealing performance can be exhibited.
Furthermore, according to the seal ring of the invention described in claim 3, good sealing performance on the contact surface can be ensured.
Furthermore, according to the seal ring of the invention described in claim 4, the insertion resistance when the seal ring is disposed between the two members can be kept low.
Further, according to the seal ring of the invention described in claim 5, since at least one member of the two members is manufactured by casting, it is possible to ensure good sealing performance even if there are many nests by casting. .

Hereinafter, the best mode for carrying out the present invention will be described.
The best mode for carrying out the invention will be described with reference to FIG.
An elastic material seal ring 3 disposed between two members (not shown) and sealing a gap between the two members, two on each side of the surface of the seal ring 3 that contacts both members. The seal ring 3 is provided with the seal projections 4, 5, 6 and 7.
The two members are members that are usually made of a casting, but are not limited to this, and are preferably used between members that are prone to irregularities and scratches on the member surface.
As the material of the seal ring 3, a rubber-like elastic material or a resin material is appropriately selected according to the intended use, and a rubber-like elastic material is preferable.

As the rubber-like elastic material, nitrile rubber, EPDM, urethane rubber, silicone rubber, fluorine rubber, or the like is appropriately selected according to the intended use.
By providing a plurality of bridges 8 for connecting the seal protrusions 4 and 5 and the seal protrusions 6 and 7, a plurality of spaces surrounded by the seal protrusions 4, 5, 6, 7 and the two members and the bridge 8 are provided. It is comprised so that it may become the sealed spaces 9 and 9.

A plurality of bridges 8 exist between the seal protrusions 4 and 5 and the seal protrusions 6 and 7, respectively.
The number of bridges 8 increases and decreases depending on the number of bumps and scratches present on the surfaces of the two members.
The greater the number of irregularities and scratches, the more the number of bridges 8 needs to be proportionally increased.
However, if the number of the bridges 8 is too large, the resistance when the seal ring is inserted between the two members becomes too large, which is not preferable.
Usually, the number of bridges 8 present on one side is 2 to 12, preferably 4 to 8.

The height of the bridge 8 is the same as that of the seal protrusions 4 and 5 and the seal protrusions 6 and 7 and is on the same plane.
As a result, the surface of the two members and a good sealed state can be achieved.

Another embodiment for carrying out the invention will be described with reference to FIG.
The difference from the embodiment of the invention based on FIG. 1 is that the seal protrusions 4 and 5 exist only on one surface.
In the case where irregularities or scratches are present only on one surface of the two-member surface, the seal protrusions 4 and 5 may be formed on only one surface in this way.
Further, the inclined surfaces 10 and 10 on both sides forming the seal protrusions 4 and 5 are gently inclined surfaces from the main body of the seal ring 3 to the top of the seal protrusions 4 and 5, so that the seal ring 3 is made of two members. The insertion resistance at the time of insertion into can be suppressed lower than that in the embodiment of FIG.
The angle of the inclined surface is 30 ° to 60 °, preferably 40 ° to 50 °.
The bridge 8 is the same as the embodiment shown in FIG.

When the seal protrusions 4, 5, 6 and 7 are provided on both sides as in the embodiment shown in FIG. 1, it is not necessary to identify the front and back when assembling the seal ring 3, so that the assembling work is easy. There is an advantage that the sealing property with the bottom of the mounting groove is good.
On the other hand, as in the embodiment shown in FIG. 2, when the seal protrusions 4 and 5 are formed only on one surface, the assembly work is complicated, but the mounting stability with respect to the mounting groove bottom surface is good. is there.
Further, the present invention is not limited to the best mode for carrying out the invention described above, and various other configurations can be adopted without departing from the gist of the present invention.

It is a half sectional view showing an embodiment of the invention concerning a seal ring. It is a half sectional view showing the prior art concerning a seal ring. It is a half sectional view showing other conventional technology concerning a seal ring. FIG. 6 is a half sectional view showing still another prior art related to a seal ring. FIG. 10 is a half sectional view showing still another prior art related to a seal ring.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... One member 2 ... The other member 3 ... Seal ring 4, 5, 6, 7 ... Seal protrusion 8 ... Bridge 9 ... Sealed space 10 ... Inclined surface

Claims (5)

  An elastic seal ring (3) disposed between two members (1) and (2) and sealing a gap between the two members (1) and (2), wherein at least one member of the seal ring ( 1) In a seal ring in which annular seal protrusions (4), (5), (6), and (7) are provided on both sides of a surface in contact with (2), the seal protrusions (4), (5), (6), and (7) By providing a plurality of bridges (8) for connecting them, the seal protrusions (4) (5) (6) (7), the one member (1) (2), and the bridge (8) A seal ring characterized in that the enclosed space is a sealed space (9), (9).   The seal ring according to claim 1, wherein the seal ring is made of a rubber-like elastic material.   The seal ring according to claim 1 or 2, wherein the height of the bridge (8) is the same as the height of the seal protrusion (4) (5) (6) (7).   4. The seal ring according to claim 1, wherein the seal protrusions (4), (5), (6), and (7) are constituted by inclined surfaces.   5. The seal ring according to claim 1, wherein at least one member (1) (2) of the two members (1) (2) is made of a casting.

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