阅读说明：本技术 密封垫 (Sealing gasket ) 是由 小野翼 于 2019-06-04 设计创作，主要内容包括：本发明涉及密封垫,提高密封垫的密封性。一种密封垫(100),配置于环状的槽部,具备：环状的基部(10),配置于所述槽部；及多个突起部(20),在所述基部(10)的周向上隔开间隔地配置,以自所述基部(10)与所述槽部的侧面相对的方式突出,并具备支撑面(20a),所述支撑面(20a)具备与所述槽部的侧面的曲率相对应的曲率；所述突起部(20)在所述周向上的长度(L1)比在所述周向上彼此相邻的所述突起部(20)的相对的端部的间隔(L2)长。(The invention relates to a gasket, which improves the sealing performance of the gasket. A gasket (100) is disposed in an annular groove portion, and is provided with: an annular base (10) disposed in the groove; and a plurality of protrusions (20) that are arranged at intervals in the circumferential direction of the base (10), protrude from the base (10) so as to face the side surfaces of the groove, and have support surfaces (20a), the support surfaces (20a) having a curvature corresponding to the curvature of the side surfaces of the groove; the length (L1) of the protrusions (20) in the circumferential direction is longer than the interval (L2) of the opposite ends of the protrusions (20) adjacent to each other in the circumferential direction.)

1. A gasket (100) is disposed in an annular groove portion, and is provided with:

an annular base (10) disposed in the groove; and

a plurality of protrusions (20) that are arranged at intervals in the circumferential direction of the base (10), protrude from the base (10) so as to face the side surfaces of the groove, and have support surfaces (20a), the support surfaces (20a) having a curvature corresponding to the curvature of the side surfaces of the groove;

the length (L1) of the protrusions (20) in the circumferential direction is longer than the interval (L2) of the opposite ends of the protrusions (20) adjacent to each other in the circumferential direction.

2. The gasket according to claim 1, wherein both ends of the support surface (20a) in the circumferential direction have a rounded shape.

3. The gasket according to claim 1 or 2, wherein both end portions of the support surface (20a) in the height direction of the base portion (10) have a rounded shape.

4. The gasket according to any one of claims 1 to 3, wherein the base portion (10) and the protrusion (20) are formed of a rubber material, and the rubber hardness is less than or equal to HAD 60.

5. The gasket according to any one of claims 1 to 4, wherein the side surface of the groove portion is formed of a resin material.

Technical Field

The present invention relates to a gasket.

Background

For example, an annular gasket for sealing the inside of a casing is disposed in the casing constituting a cooling water tank, an intake manifold, a filter holder, and the like of an automobile or the like (for example, japanese patent application laid-open No. 10-9395, hereinafter referred to as "patent document 1").

Disclosure of Invention

Technical problem to be solved by the invention

The gasket described in patent document 1 is disposed in an annular groove portion provided in the housing. In order to prevent the gasket from falling down in the groove portion, a protrusion portion facing a side surface of the groove portion is provided. In the gasket, the protrusion is curved in a plan view, and the circumferential center portion thereof protrudes toward the side surface of the groove portion, so that the contact area with the side surface of the groove portion is reduced. Thus, improvement is required from the viewpoint of improving the sealing property.

The invention aims to improve the sealing performance of a gasket.

Means for solving the problems

The gasket of the present invention is disposed in an annular groove portion, and includes:

an annular base portion disposed in the groove portion;

a plurality of protrusions that are arranged at intervals in the circumferential direction of the base portion, protrude from the base portion so as to face the side surfaces of the groove portion, and have support surfaces that have a curvature corresponding to the curvature of the side surfaces of the groove portion;

the length of the protrusion in the circumferential direction is longer than the interval of the opposite end portions of the protrusions adjacent to each other in the circumferential direction.

Effects of the invention

According to the present invention, the sealing performance of the gasket can be improved.

Drawings

FIG. 1 is a top view of an embodiment gasket;

FIG. 2 is an enlarged view of a portion of FIG. 1;

FIG. 3 is a cross-sectional view A-A of FIG. 1;

FIG. 4 is a cross-sectional view B-B of FIG. 1;

FIG. 5 is a cross-sectional view C-C of FIG. 1;

FIG. 6 is a plan view showing a state where a gasket is disposed in a groove portion;

FIG. 7 is a cross-sectional view showing a state where a gasket is arranged in a groove portion and sealed;

fig. 8 is a cross-sectional view showing a state in which a gasket is disposed in a groove portion and sealed.

Detailed Description

Next, a gasket of an embodiment will be explained based on the drawings. The embodiments are not intended to limit the present invention. The components of the embodiments include those that can be easily replaced by those skilled in the art or those that are substantially the same.

Fig. 1 is a plan view of a gasket 100 of the embodiment. Fig. 2 is a partially enlarged view of fig. 1. As shown in fig. 1, the gasket 100 is formed in a ring shape using a rubber material such as silicone rubber or fluororubber. The gasket 100 can be elastically deformed by applying a force from the outside. For example, the rubber hardness of the gasket 100 is HDA60 (according to JIS K7215 shore a).

The gasket 100 is disposed in the annular groove portion 50 of a housing (predetermined member) 200 constituting, for example, a cooling water tank, an intake manifold, a filter holder, and the like of an automobile or the like. The case 200 is formed of, for example, a resin material, but is not limited thereto, and may be formed of another material such as a metal. The groove 50 includes a side surface 60 and a bottom surface 70 (see fig. 2 and the like). The side surface 60 includes: an inner surface 61 along the inner peripheral side of the gasket 100, and an outer surface 62 along the outer peripheral side of the gasket 100. The bottom surface 70 is planar for receiving the gasket 100.

The gasket 100 includes a base 10 and a protrusion 20. The base 10 is annular corresponding to the shape of the groove 50 of the housing 200. For example, the groove portion 50 of the present embodiment has an annular shape. Therefore, the gasket 100 has an annular shape corresponding to the shape of the groove 50. The shape of the groove 50 and the shape of the gasket 100 are not limited to the circular shape, and may be other shapes.

In the following description of the structure of the gasket 100, the direction in which the base 10 extends annularly is referred to as the circumferential direction of the base 10. In a state where the gasket 100 is disposed in the groove portion 50, a direction perpendicular to the bottom surface 70 of the groove portion 50 is denoted as a height direction of the base portion 10. The height direction of the base 10 is indicated as downward, and the direction from the gasket 100 toward the bottom surface 70 of the groove 50 is indicated as upward.

The protrusion 20 is disposed to protrude toward the side surface 60 of the groove 50. The plurality of protrusions 20 are arranged at intervals in the circumferential direction of the base 10. The plurality of protrusions 20 are arranged over the circumference of the base 10. The protrusions 20 are arranged at equal intervals in the circumferential direction of the base 10, for example, but the present invention is not limited thereto, and at least one interval may be different from the others.

The protrusion 20 includes a support surface 20a facing the side surface 60. As shown in fig. 2, the support surface 20a has a curvature corresponding to the curvature of the side surface 60 in the circumferential direction. For example, the support surface 20a of the present embodiment is parallel to the side surface 60. Further, both end portions of the support surface 20a in the circumferential direction have a rounded shape.

Some of the plurality of projections 20 include small projections 20 b. In the plurality of protrusions 20 of the present embodiment, the small protrusions 20b are arranged every four in the circumferential direction, but the present invention is not limited to this. All the protrusions 20 may have small protrusions 20 b. For example, the small protrusions 20b are formed in a shape protruding in a hemispherical shape from the support surface 20a toward the side surface 60, but the shape is not limited thereto, and other shapes may be used. The small protrusion 20b is disposed at the circumferential center of the protrusion 20, for example. Further, the one support surface 20a may include a plurality of small protrusions 20 b.

The circumferential length of the projection 20 is L1. The circumferential interval between the opposite ends (end 20c and end 20d in fig. 1) of the circumferentially adjacent projections 20 is L2. At this time, the length L1 is longer than the interval L2. Therefore, when the gasket 100 is disposed in the groove portion 50, the circumferential length of the portion where the gasket 100 and the side surface 60 contact via the protrusion 20 is longer than the circumferential length of the portion where the gasket 100 and the side surface 60 do not contact.

The protrusion 20 includes an inner peripheral protrusion 21 and an outer peripheral protrusion 22. The inner peripheral side protrusion 21 is disposed on the inner peripheral side of the base 10. The inner peripheral protrusion 21 protrudes from the inner peripheral surface 11 of the base 10 toward the inner surface 61 of the groove 50. The inner peripheral protrusion 21 includes an inner peripheral support surface 21a facing the inner surface 61. The inner peripheral side support surface 21a has a curvature corresponding to the curvature of the inner side surface 61. The curvature C1 of the inner peripheral support surface 21a in the present embodiment is the same as the curvature of the inner surface 61.

The outer peripheral protrusion 22 is disposed on the outer peripheral side of the base 10. The outer peripheral side protrusion 22 protrudes from the outer peripheral surface 12 of the base 10 toward the outer side surface 62 of the groove 50. The outer peripheral protrusion 22 includes an outer peripheral support surface 22a facing the outer side surface 62. The outer peripheral side support surface 22a has a curvature corresponding to the curvature of the outer side surface 62. The curvature C2 of the outer peripheral support surface 22a in the present embodiment is the same as the curvature of the outer side surface 62.

In the present embodiment, the inner surface 61 and the outer surface 62 are cylindrical. The inner surface support surface 21a is formed of, for example, a part of a cylindrical surface having the same diameter as the inner surface 61 so as to have the same curvature C1 as the inner surface 61. Similarly, the outer peripheral support surface 22a is formed of, for example, a part of a cylindrical surface having the same diameter as the outer side surface 62 so as to have the same curvature C2 as the outer side surface 62.

In the present embodiment, the inner circumferential protrusion 21 and the outer circumferential protrusion 22 are arranged in the same range in the circumferential direction. The length of the inner circumferential protrusion 21 in the circumferential direction is equal to the length of the outer circumferential protrusion 22 (length L1, respectively).

Fig. 3 is a sectional view a-a of fig. 1. As shown in fig. 3, the base 10 is octagonal in a plan sectional view perpendicular to the circumferential direction. The inner circumferential surface 11 is parallel to the outer circumferential surface 12. The base 10 includes a lower surface 13 and an upper surface 14. The lower surface 13 contacts the bottom surface 70 of the groove 50. The upper surface 14 is in contact with a sealing member 300 (refer to fig. 6, 7) that seals the housing 200. The lower surface 13 is parallel to the upper surface 14.

Fig. 4 is a sectional view B-B of fig. 1. Fig. 4 shows a portion of the base 10 where the protrusion 20 is disposed. As shown in fig. 4, the upper end and the lower end of the support surface 20a (the inner peripheral support surface 21a and the outer peripheral support surface 22a) in the height direction have rounded shapes.

Fig. 5 is a cross-sectional view C-C of fig. 1. Fig. 5 shows a sectional shape of the projection 20 provided with the small projection 20 b. As shown in fig. 5, the small projection 20b is disposed at, for example, the center in the height direction of the support surface 20a, but is not limited thereto, and may be disposed at another position. Further, a plurality of small protrusions 20b may be arranged in the height direction of the support surface 20 a.

Fig. 6 is a plan view showing a state where the gasket 100 is disposed in the groove portion 50. Fig. 7 is a cross-sectional view showing a state in which a gasket is disposed in a groove portion and sealed. The gasket 100 is disposed in the groove 50, and the housing 200 is sealed with the sealing member 300, whereby the gasket 100 is elastically deformed in the groove 50. Since the support surface 20a of the present embodiment has the curvatures C1 and C2 corresponding to the curvatures of the side surface 60, when the gasket 100 is disposed in the groove portion 50, almost the entire surface of the support surface 20a is in contact with the side surface 60. Therefore, when the gasket 100 is sealed by the sealing member 300, as shown in fig. 6 and 7, the support surface 20a is stably supported by the side surface 60, and the gasket 100 can be prevented from falling down in the groove portion 50. Also, almost the entire surface of the support surface 20a is in contact with the side surface 60, thereby increasing the frictional force between the support surface 20a and the side surface 60. Therefore, the gasket 100 can be prevented from falling off from the groove portion 50.

The upper end and the lower end of the support surface 20a (the inner peripheral support surface 21a and the outer peripheral support surface 22a) in the height direction of the present embodiment have rounded shapes. The circumferential ends of the support surface 20a have a rounded shape. Therefore, the space between the rounded portion and the side surface 60 can ensure sufficient deformation of the protrusion 20 and stable sealing performance.

The circumferential length L1 of the projection 20 is longer than the circumferential interval L2 of the opposite end portions of the projections 20 adjacent to each other in the circumferential direction. Thus, when the gasket 100 is disposed in the groove portion 50 and sealed, the circumferential length of the portion where the support surface 20a and the side surface 60 are in contact is longer than the circumferential length of the portion where the gasket 100 and the side surface 60 are not in contact. Thereby, the gasket 100 is disposed in the groove portion 50 at a high filling rate, and the sealing property is improved.

Fig. 8 is a cross-sectional view showing a state in which a gasket is disposed in a groove portion and sealed. Fig. 8 shows a section of a portion provided with the small projection 20 b. The small protrusion 20b is disposed at a substantially central portion of the support surface 20a in the height direction, and thus, as shown in fig. 8, the gasket 100 can be prevented from coming off the groove portion 50. Further, since the small protrusions 20b are hemispherical, the surfaces of the hemispherical small protrusions 20b can be efficiently pressed against the side surfaces 60 of the groove 50. This can more effectively prevent the gasket 100 from coming off.

As described above, the gasket 100 of the present embodiment includes the annular base portion 10 disposed in the annular groove portion 50, and the plurality of protrusion portions 20 disposed at intervals in the circumferential direction of the base portion 10. The protrusion 20 protrudes from the base 10 so as to face the side surface of the groove 50, and includes a support surface 20a having a curvature corresponding to the curvature of the side surface 60 of the groove 50. The circumferential length L1 of the projection 20 is longer than the interval L2 of the opposite end portions of the projections 20 adjacent to each other in the circumferential direction.

Thus, when the gasket 100 is disposed in the groove portion 50, the circumferential length of the portion where the protrusion 20 contacts the side surface 60 is longer than the circumferential length of the portion where the gasket 100 does not contact the side surface 60. Therefore, the gasket 100 is disposed in the groove portion 50 at a high filling rate, and the sealing property is improved. And, almost the entire surface of the support surface 20a is in contact with the side surface 60, whereby the frictional force between the support surface 20a and the side surface 60 is increased. Therefore, the gasket 100 can be prevented from falling off from the groove portion 50.

Both ends of the support surface 20a in the circumferential direction or both ends of the support surface 20a in the height direction of the base 10 have a rounded shape. Accordingly, when the gasket 100 is sealed in a state in which it is disposed in the groove portion 50, the space between the rounded portion and the side surface 60 is used, and thus the sufficient deformation of the protrusion portion 20 can be ensured, and stable sealing performance can be ensured.

The base 10 and the protrusion 20 are made of a rubber material, and the rubber hardness is not more than HDA 60. This can reduce the reaction force on the case 200 side.

The side surfaces 60 of the groove 50 are formed of a resin material. This can reduce the reaction force on the side surface 60 of the groove portion 50 formed of the resin material.

Description of the symbols

10-base, 11-inner periphery, 12-outer periphery, 13-lower surface, 14-upper surface, 20-protrusion, 20 a-bearing surface, 20 b-tab, 21-inner periphery protrusion, 21 a-inner periphery bearing surface, 22-outer periphery protrusion, 22 a-outer periphery bearing surface, 50-groove, 60-side, 61-inner side, 62-outer side, 70-bottom, 100-gasket, 200-housing, 300-seal member, C1, C2-curvature, L1-length, L2-spacing.