JP2020051434A - Sealing device - Google Patents

Abstract

To provide a sealing device that is easy to be fitted and hard to fall off.SOLUTION: A sealing device that is fitted to an opening provided on a housing and seals an annular gap between an insertion member inserted into the opening and the inner peripheral surface of the opening of the housing. The sealing device comprises a sealing device main body of elastic rubber and a reinforcing ring embedded in the sealing device main body. The sealing device main body comprises: an outer peripheral lip configured to extend outward from a section where thee reinforcing ring is arranged toward a direction opposite to the mounting direction and to contact an inner peripheral surface of the housing opening; an inner peripheral lip configured to extend from the section where thee reinforcing ring is arranged toward a direction opposite to the mounting direction and to contact an outer peripheral surface of the insertion member; a cylindrical part extending from a section where the reinforcing ring is arranged toward a mounting direction and having a step on an outer peripheral surface; and a protrusion provided on an outer peripheral surface on a mounting direction side rather the step of the cylindrical part. The step is engaged with inward projection on the inner peripheral surface of the opening in the mounting direction. The protrusion is engaged with the projection in the direction opposite to the mounting direction.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a sealing device for sealing an annular gap between a housing and an insertion member inserted therein.

  As a sealing device for sealing an annular gap between a housing and an insertion member inserted therein, there are a gasket and a connector seal mounted on a case or a cover into which a connector is inserted. Patent Literature 1 discloses a technique related to a seal structure and a connector structure used for connection of an electric device. Patent Document 2 discloses that in a fitting structure of a connector of an electric device, a connector is sealed by a sealing device having a configuration in which a metal plate is surrounded by rubber.

JP 2010-123329 A International Publication No. WO 2010/113243

  Since the above-described sealing device is attached to an opening provided in the housing from the outside of the housing, it can be easily attached, can be accurately attached to a predetermined position of the housing, and further, the attached sealing device can be easily installed in the housing. It is required that they do not fall off. However, if the sealing device is configured to be easily deformed in order to improve the ease of mounting, the sealing device may be easily removed from a predetermined position, and the mounted sealing device may be easily dropped.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a sealing device that is easy to attach and that is difficult to fall off.

The present invention employs the following means in order to solve the above problems.
That is, the sealing device of the present invention,
A sealing device mounted on an opening provided in a housing, for sealing an annular gap between an insertion member inserted into the opening and an inner peripheral surface of the opening of the housing,
A sealing device body made of rubber elastic body,
A reinforcing ring embedded inside the sealing device body,
With
The sealing device body,
It is configured to extend from a portion where the reinforcing ring is provided to an outer peripheral side in a direction opposite to a mounting direction when the sealing device is mounted in the opening, and to contact an inner peripheral surface of the opening of the housing. An outer lip,
From the portion where the reinforcing ring is provided, an inner peripheral lip portion that extends toward the inner peripheral side in a direction opposite to the mounting direction and is configured to abut on the outer peripheral surface of the insertion member,
From the portion where the reinforcing ring is provided, a tubular portion extending in the mounting direction and having a step on the outer peripheral surface,
A protrusion provided on the outer peripheral surface of the cylindrical portion on the mounting direction side from the step portion,
Has,
The position of the outer peripheral surface of the cylindrical portion on the mounting direction side from the step portion is closer to the inner peripheral surface than the position of the outer peripheral surface on the side opposite to the mounting direction, and the step portion is on the inner peripheral surface of the opening. Engage in the mounting direction with an inward projection provided on the mounting direction side from the portion where the outer peripheral lip abuts,
The sealing device is characterized in that the projection engages with the projection in a direction opposite to a mounting direction.

  In this sealing device, a portion on the side opposite to the mounting direction with respect to the cylindrical portion is formed to have a Y-shaped cross section by the outer peripheral lip portion and the inner peripheral lip portion, and when the sealing device is mounted on the opening of the housing. Since the outer peripheral lip portion and the inner peripheral lip portion bend, it is easy to mount. Also, it is easy to mount even in a small opening.

  A tubular portion made of a rubber elastic body is provided on the mounting direction side of a portion where the reinforcing ring is provided in the sealing device, and the tubular portion has a step. The portion (first portion) opposite to the mounting direction from the step portion is adjacent to the portion provided with the reinforcing ring. In the portion (second portion) in the mounting direction from the step portion, the position of the outer peripheral surface is inside the position of the outer peripheral surface of the first portion. Due to the difference in the position of the outer peripheral surface, the step portion between the first portion and the second portion engages with the convex portion provided on the inner peripheral surface of the opening of the housing in the mounting direction. Therefore, accurate positioning can be performed when the sealing device is mounted.

  After the sealing device is mounted in the opening, the protrusion provided on the outer peripheral surface of the portion (second portion) in the mounting direction from the step of the cylindrical portion engages with the projection in the direction opposite to the mounting direction. . Therefore, the sealing device is prevented from falling off, and the falling off of the sealing device after mounting is suppressed. That is, after the insertion member is attached, the insertion member is obstructed, and the projection (second portion) does not bend inward, so that the projection is prevented from falling off.

  A portion of the cylindrical portion (first portion) made of a rubber elastic body is provided between a portion of the sealing device where the reinforcing ring is provided and a portion of the tubular portion where the protrusion is provided (second portion). Part). Therefore, the sealing device is easily deformed when the sealing device is mounted, and the mounting property is improved.

  When the space on the mounting direction side of the space separated by the housing is the inside and the space on the opposite side to the mounting direction is the outside, the external pressure acts to press the outer peripheral lip portion against the inner peripheral surface of the housing opening. At the same time, it acts to press the inner peripheral lip against the outer peripheral surface of the insertion member. Therefore, high sealing performance is exhibited.

  As described above, according to the sealing device of the present invention, it is possible to achieve both improvement in ease of mounting and suppression of falling off.

In the sealing device according to the present invention, the reinforcing ring may be made of metal.
As a result, the rigidity of the reinforcing ring is increased, so that the sealing device is prevented from falling off.

In the sealing device according to the present invention, the reinforcing ring may have a tubular shape and an end portion may be bent.
This suppresses deformation due to torsion when the sealing device is mounted on the opening. Therefore, the engagement between the step portion or the projection and the projection of the opening is prevented from being disengaged, and the falling off of the sealing device is suppressed.

In the sealing device according to the present invention, the tip of the projection in the mounting direction may have a slope approaching the inner peripheral surface side in the mounting direction.
This reduces the resistance between the projections and the projections of the opening when the sealing device is mounted, thereby facilitating the mounting of the sealing device.

In the sealing device according to the present invention, the protrusion may be provided in a ring shape in a circumferential direction of the cylindrical portion.
Thereby, the engagement with the convex portion of the opening becomes more reliable, and the falling off of the sealing device can be suppressed.

In the sealing device according to the present invention, a plurality of the protrusions may be provided at intervals in a circumferential direction of the cylindrical portion.
As a result, the cylindrical portion is easily deformed, so that it is possible to achieve both improvement in the mounting property and suppression of falling off.

In the sealing device according to the present invention, the opening has an oval shape,
A plurality of the protrusions may be provided at both ends in the longitudinal direction of the opening, and may not be provided at both ends in the short direction.
By providing the projections at both ends of the opening in the longitudinal direction, the cylindrical portion made of the rubber elastic body is easily deformed, so that the mountability of the sealing device is improved. Further, by providing a plurality of protrusions at both ends in the longitudinal direction, it is possible to suppress the falling off. Therefore, it is possible to achieve both improvement of the mounting property and suppression of the falling off.

  It should be noted that the above configurations can be employed in combination as much as possible.

  ADVANTAGE OF THE INVENTION According to this invention, the sealing device which is easy to attach and hard to fall can be provided.

FIG. 1 is a schematic sectional view of the sealing device according to the first embodiment of the present invention. FIG. 2 is a schematic top view of the sealing device according to the first embodiment of the present invention. FIG. 3 is a perspective view of the sealing device according to the first embodiment of the present invention. FIG. 4 is a perspective view showing a cross section of the sealing device according to the first embodiment of the present invention. FIG. 5 is a side view of the sealing device according to the first embodiment of the present invention.

  Embodiments for carrying out the present invention will be illustratively described in detail below based on embodiments with reference to the drawings. However, the dimensions, materials, shapes, relative arrangements, and the like of the components described in this embodiment are not intended to limit the scope of the present invention thereto unless otherwise specified. .

  A sealing device according to an embodiment of the present invention will be described with reference to FIGS.

(Example 1)
FIG. 1 is a schematic sectional view of the sealing device according to the first embodiment. FIG. 2 is a schematic top view of the sealing device according to the first embodiment of the present invention. The left side in FIG. 1 shows the AA section in FIG. 2, and the right side in FIG. 1 shows the BB section in FIG. FIG. 3 is a perspective view of the sealing device according to the first embodiment of the present invention. FIG. 4 is a perspective view showing a cross section of the sealing device according to the first embodiment of the present invention. FIG. 5 is a side view of the sealing device according to the first embodiment of the present invention.

The sealing device 100 is attached to an opening 201 provided in the housing 200, and seals an annular gap between an outer peripheral surface 301 of the insertion member 300 inserted through the opening 201 and an inner peripheral surface 202 of the opening 201 of the housing 200. I do. FIG. 1 is a view showing a state where no external force is applied to the sealing device 100. For convenience of explanation, a positional relationship between a housing 200 in which the sealing device 100 is mounted and an insertion member 300 inserted through the sealing device 100 is shown. The housing 200 and the insertion member 300 are shown by dashed lines. As shown in FIG. 2, the sealing device 100 according to the first embodiment has a shape that can be attached to the oval-shaped opening 201. Examples of the sealing device 100 include a gasket and a connector seal. Examples of the housing 200 include a cover of a PCU (power control unit) of a vehicle. As the insertion member 300, a connector or the like connected to the PCU can be exemplified. Further, the present invention can be applied to an inverter, a converter, and the like. However, the housing and the insertion member to which the sealing device of the present invention can be applied are not limited to these examples. Generally, any seal can be used without any particular limitation as long as it is a seal between a hole in the housing and the shaft.

  The sealing device 100 is mounted on the periphery of the opening 201 of the housing 200 in the direction indicated by the arrow I from the upper side to the lower side in the figure. This direction is hereinafter referred to as the mounting direction. In the first embodiment, the space S1 in the mounting direction I of the sealing device 100 among the spaces separated by the housing 200 is defined as “inside”, and the space S2 in the opposite direction to the mounting direction I is defined as “outside”.

  The sealing device 100 includes a sealing device main body 110 made of a rubber elastic body, and a metal reinforcing ring 120 buried inside the sealing device main body 110. The reinforcing ring 120 is cylindrical and has a bent portion 121 bent toward the outer peripheral surface at an end in the mounting direction.

  The outer peripheral lip configured to extend from the portion where the reinforcing ring 120 is provided to the outer peripheral side in the direction opposite to the mounting direction I and to contact the inner peripheral surface 202 of the opening 201 of the housing 200. It has a part 111. Further, the sealing device main body 110 extends from the portion where the reinforcing ring 120 is provided to the inner peripheral side in the direction opposite to the mounting direction I, and is configured to abut on the outer peripheral surface 301 of the insertion member 300. It has a lip 112.

  The sealing device main body 110 has a cylindrical portion 117 extending in a mounting direction I from a portion where the reinforcing ring 120 is provided, and having a step portion 116 on the outer peripheral surface. The position of the outer peripheral surface 119 on the mounting direction I side of the step portion 116 of the cylindrical portion 117 is closer to the inner peripheral surface than the position of the outer peripheral surface 118 on the opposite side of the mounting direction I from the step portion 116. The step portion 116 engages in the mounting direction with an inward convex portion 203 provided on the mounting direction I side from a portion 204 of the inner peripheral surface 202 of the opening 201 where the outer peripheral lip portion 111 contacts.

  The sealing device main body 110 has a protrusion 115 provided on the outer peripheral surface 119 on the mounting direction I side from the step portion 116 of the cylindrical portion 117. The protrusion 115 engages with the protrusion 203 of the opening 201 in a direction opposite to the mounting direction. The tip of the protrusion 115 in the mounting direction I has an inclined surface 1151 approaching the inner peripheral surface side along the mounting direction I.

  In the first embodiment, as shown in FIG. 3, a plurality of protrusions 115 are provided at intervals in the circumferential direction of the cylindrical portion 117. Specifically, two protrusions 115 are provided at both ends in the longitudinal direction of the oval shape, and are not provided at both ends in the short direction.

(Excellent points of the sealing device according to the first embodiment)
In the sealing device 100 of the first embodiment configured as described above, a portion on the side opposite to the mounting direction I with respect to the cylindrical portion 117 is configured to have a Y-shaped cross section by the outer peripheral lip portion 111 and the inner peripheral lip portion 112. ing. Accordingly, when the sealing device 100 is mounted on the opening 201 of the housing 200, the outer peripheral lip portion 111 and the inner peripheral lip portion 112 bend, so that the mounting is easy. Further, even when the width of the opening 201 is narrow, the sealing device 100 can be easily mounted.

On the mounting direction I side of the portion where the reinforcing ring 120 is provided in the sealing device 100, there is a cylindrical portion 117 made of a rubber elastic body, and the cylindrical portion 117 has a step portion 116. A portion 113 (first portion) opposite to the mounting direction I from the step portion 116 is adjacent to a portion where the reinforcing ring 120 is provided. A portion 114 (second portion) of the mounting direction I from the step portion 116 has a radial position on the outer peripheral surface inside the radial position on the outer peripheral surface of the first portion 113. Due to such a difference in the radial position of the outer peripheral surface, the step portion 116 between the first portion 113 and the second portion 114 has an inward convex portion provided on the inner peripheral surface 202 of the opening 201 of the housing 200. It engages with the part 203 in the mounting direction. Therefore, accurate positioning can be performed when the sealing device 100 is mounted.

  After the sealing device 100 is mounted in the opening 201, the protrusion 115 provided on the outer peripheral surface 119 of the portion in the mounting direction I (the second portion 114) from the stepped portion 116 of the cylindrical portion 117 is aligned with the mounting direction I. It engages with the projection 203 in the opposite direction. Accordingly, the sealing device 100 is prevented from falling off, and the sealing device 100 is prevented from falling off after mounting.

  Between the portion of the sealing device 100 where the reinforcing ring 120 is provided and the portion of the tubular portion 117 where the protrusion 115 is provided (the second portion 114), the cylindrical portion 117 made of a rubber elastic body is provided. Part (first part 113). Therefore, when the sealing device 100 is mounted, the sealing device 100 is easily deformed, and the mounting property is improved.

  The pressure of the outside S <b> 2 acts to press the outer peripheral lip 111 against the inner peripheral surface 202 of the opening 201 of the housing 200, and acts to press the inner peripheral lip 112 against the outer peripheral surface 301 of the insertion member 300. Therefore, high sealing performance for sealing the annular gap between the inner peripheral surface 202 of the opening 201 and the outer peripheral surface 301 of the insertion member 300 is exhibited.

  The reinforcing ring 120 has a cylindrical shape made of metal and has a high rigidity because its end is bent. Therefore, when the sealing device 100 is mounted on the opening 201, deformation due to torsion is suppressed. Therefore, the engagement between the step portion 116 or the projection 115 and the projection 203 of the opening 201 is prevented from being disengaged, and the falling off of the sealing device 100 is suppressed.

  Since the tip of the protrusion 115 in the mounting direction is an inclined surface 1151, the resistance between the protrusion 203 of the opening 201 and the protrusion 115 when the sealing device 100 is mounted is reduced, and the mounting of the sealing device 100 is performed. The performance is improved.

  The opening 201 has an oval shape, and the protrusions 115 are provided at both ends in the longitudinal direction of the oval shape and are not provided at both ends in the short direction. Therefore, the cylindrical portion 117 made of a rubber elastic body is easily deformed. Become. Thereby, the mountability of the sealing device 100 is improved. In addition, since a plurality of protrusions 115 are provided at both ends in the longitudinal direction of the oval shape at intervals, the falling off of the sealing device 100 is suppressed.

  As described above, according to the sealing device 100 of the first embodiment, it is possible to achieve both improvement in ease of mounting the sealing device 100 and suppression of falling off.

(Other)
In the first embodiment, the configuration in which the reinforcing ring is made of metal is exemplified, but the material of the reinforcing ring is not limited to metal. A resin or the like having a higher hardness than the rubber elastic body constituting the sealing device main body 110 may be used. Further, the configuration in which the tip of the reinforcing ring on the mounting direction side is bent toward the outer peripheral surface side is exemplified, but the bending position of the reinforcing ring may be the distal end on the side opposite to the mounting direction, or the bending direction may be on the inner peripheral surface side. .

  In the first embodiment, the example of the sealing device configured to be attachable to the oval-shaped opening 201 has been described. However, the shape of the sealing device is appropriately determined according to the shape of the opening to be attached. It is not limited to the shape illustrated in Example 1. Even if the shape of the opening is a circle, an ellipse, a rounded rectangle, or the like, the present invention can be applied by configuring the shape of the sealing device to be a circle, an ellipse, a rounded rectangle, or the like.

  In the first embodiment, the sealing device has a configuration in which a plurality of protrusions are provided at intervals in the circumferential direction, but the protrusions may be provided in a ring shape in the circumferential direction. By providing the projections in an annular shape, the engagement with the projections of the opening is less likely to be disengaged, and the effect of suppressing the falling off is enhanced.

100: sealing device 110: sealing device main body 111: outer peripheral lip portion 112: inner peripheral lip portion 113: first portion 114: second portion 115: projection portion 1151: inclined surface 116: step portion 117: cylindrical portion 118 : Outer peripheral surface 119: Outer peripheral surface 120: Reinforcing ring 200: Housing 201: Opening 202: Inner peripheral surface 203: Convex part 204: Part where outer peripheral lip abuts 300: Inserting member 301: Outer peripheral surface

Claims (7)

A sealing device mounted on an opening provided in a housing, for sealing an annular gap between an insertion member inserted into the opening and an inner peripheral surface of the opening of the housing,
A sealing device body made of rubber elastic body,
A reinforcing ring embedded inside the sealing device body,
With
The sealing device body,
It is configured to extend from a portion where the reinforcing ring is provided to an outer peripheral side in a direction opposite to a mounting direction when the sealing device is mounted in the opening, and to contact an inner peripheral surface of the opening of the housing. An outer lip,
From the portion where the reinforcing ring is provided, an inner peripheral lip portion that extends toward the inner peripheral side in a direction opposite to the mounting direction and is configured to abut on the outer peripheral surface of the insertion member,
From the portion where the reinforcing ring is provided, a tubular portion extending in the mounting direction and having a step on the outer peripheral surface,
A protrusion provided on the outer peripheral surface of the cylindrical portion on the mounting direction side from the step portion,
Has,
The position of the outer peripheral surface of the cylindrical portion on the mounting direction side from the step portion is closer to the inner peripheral surface than the position of the outer peripheral surface on the side opposite to the mounting direction, and the step portion is on the inner peripheral surface of the opening. The outer peripheral lip portion engages in the mounting direction with an inward convex portion provided on the mounting direction side from a contact portion,
The sealing device according to claim 1, wherein the protrusion engages the protrusion in a direction opposite to a mounting direction.   The sealing device according to claim 1, wherein the reinforcing ring is made of metal.   The sealing device according to claim 1, wherein the reinforcing ring has a tubular shape and has an end bent.   The sealing device according to any one of claims 1 to 3, wherein a tip of the projection in the mounting direction has an inclined surface approaching an inner peripheral surface side in the mounting direction.   The sealing device according to any one of claims 1 to 4, wherein the protrusion is provided in an annular shape in a circumferential direction of the cylindrical portion.   The sealing device according to claim 1, wherein a plurality of the protrusions are provided at intervals in a circumferential direction of the cylindrical portion. The opening is oval-shaped,
The sealing device according to claim 6, wherein a plurality of the protrusions are provided at both ends in the longitudinal direction of the opening, and are not provided at both ends in the short direction.

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