JP2018204672A - gasket - Google Patents

Abstract

To provide a gasket which can securely join a sealing member to an opening inner edge.SOLUTION: A gasket 1 includes: a plate 2 including an opening O into which a shaft 11 is inserted; and a sealing member 6 which is provided at an inner edge 2a of the plate 2 forming the opening O and contacts with the shaft 11 to seal the opening O. The inner edge 2a of the plate 2 is bent in a reverse direction R of an insertion direction I of the shaft 11 to form a bending part 2d and the bending part 2d digs into the sealing member 6.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a gasket.

  In general, a pipe is sealed by providing a flat gasket in a pipe containing fluid so as to be orthogonal to the axial direction of the pipe.

In such a gasket, as disclosed in Patent Document 1, an opening through which a shaft is inserted may be provided.
In the gasket disclosed in Patent Document 1, the interface between the inner edge of the gasket that forms the opening and the shaft that passes through the opening is not exposed to the fluid, so this interface is not particularly sealed.

  Unlike the above, when the interface between the inner edge of the opening of the gasket and the shaft is exposed to the fluid and the interface needs to be sealed, the sealing member formed of an elastic body such as an elastomer is attached to the gasket. The interface may be sealed by bonding to the inner edge of the constituting plate and bringing the sealing member into contact with the shaft.

  For example, when forming a mesh or filter for filtering foreign matters such as metal pieces, dust and impurities on the gasket, the filter is clogged when the sealing member is joined to the inner edge of the plate constituting the gasket. Instead of an adhesive that may cause a plurality of through holes to be formed at equiangular intervals in the circumferential direction along the inner edge of the opening of the plate constituting the gasket, and the inner edge of the plate is covered from the front and back As described above, the sealing member may be joined to the plate by inserting the through-hole and forming both the front and back portions together.

JP-A-9-108521

  In the gasket as described above, when the shaft is inserted into the opening, the shaft and the sealing member slide, and due to this sliding, a force that is pulled in the insertion direction of the shaft acts on the sealing member. Therefore, it is desired to further strengthen the bonding of the sealing member to the inner edge of the opening of the gasket.

  The problem to be solved by the present invention is to provide a gasket capable of firmly joining a sealing member to the inner edge of the opening.

The present invention employs the following means in order to solve the above problems. That is, the present invention includes a plate having an opening through which a shaft is inserted, and a sealing member that is provided on an inner edge of the plate forming the opening and seals the opening by contacting the shaft. The inner edge of the plate is bent in a direction opposite to the insertion direction of the shaft to form a bent portion, and the gasket is in a state of biting into the sealing member.
According to the above configuration, even when the sealing member is joined to the plate without using an adhesive, the bent portion bent in the direction opposite to the shaft insertion direction is the sealing member. In other words, the shaft is inserted into the opening in the insertion direction so that the shaft and the sealing member are engaged with each other. Even if a force pulled in the insertion direction acts on the portion of the sealing member located on the opposite side of the shaft insertion direction with respect to the plate due to the frictional force in this sliding, Can resist. Therefore, even when no adhesive is used, it is possible to realize a gasket capable of firmly joining the sealing member to the inner edge of the opening.

In one aspect of the present invention, the bent portion is formed over the entire circumference of the inner edge.
According to the above configuration, since the bent portion is formed over the entire circumference of the inner edge, it can resist the force with which the sealing member is pulled in the insertion direction at any position of the inner edge. Even when no adhesive is used, it is possible to realize a gasket capable of firmly joining the sealing member to the inner edge of the opening.

In another aspect of the present invention, the plurality of bent portions are formed at intervals along the inner edge.
According to the above configuration, the bent portions are not formed over the entire circumference of the inner edge, but are formed at intervals along the inner edge, that is, partially at the inner edge. The amount of material required can be reduced, and therefore the manufacturing cost of the gasket can be reduced.

In another aspect of the present invention, the bent portion is formed by bending the inner edge of the plate a plurality of times.
According to the above configuration, the inner edge of the plate is bent a plurality of times to form a bent portion, so that the sealing member can more strongly resist the force that is pulled in the insertion direction. Therefore, even when no adhesive is used, it is possible to realize a gasket capable of firmly joining the sealing member to the inner edge of the opening.

In another aspect of the present invention, the plate is formed with a mesh to form a filter.
According to the above configuration, even when no adhesive is used, it is possible to realize a gasket configured with a filter that can firmly bond the sealing member to the inner edge of the opening. Therefore, the filter is clogged with the adhesive. do not do.

  ADVANTAGE OF THE INVENTION According to this invention, the gasket which can join a sealing member firmly to an opening inner edge can be provided.

It is sectional drawing of the gasket in embodiment of this invention. It is explanatory drawing of the use condition of the gasket of FIG. It is a top view of the gasket of FIG. It is a perspective view of a board of a gasket in the 1st modification of an embodiment of the present invention. It is sectional drawing of the gasket in the 2nd modification of embodiment of this invention. It is explanatory drawing of the use condition of the gasket in the 3rd modification of embodiment of this invention. It is a top view of the gasket in the 4th modification of an embodiment of the present invention. It is sectional drawing of the gasket in the 5th modification of embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  Although the gasket which concerns on embodiment of this invention is used for the continuously variable transmission (CVT), multistage transmission, etc. of a motor vehicle, for example, it is not limited to these uses.

FIG. 1 is a cross-sectional view of a gasket 1 according to an embodiment of the present invention. FIG. 2 is an explanatory diagram of the usage state of the gasket 1. FIG. 3 is a plan view of the gasket 1. In the present embodiment, the gasket 1 is formed in a disk shape, and FIGS. 1 and 2 show only the left side portion of the cross section of the gasket 1.
The gasket 1 includes a plate 2 having an opening O through which the shaft 11 is inserted, and a sealing member 6 that is provided on the inner edge 2a of the plate 2 that forms the opening O and that contacts the shaft 11 to seal the opening O. The inner edge 2a of the plate 2 is bent in the direction R opposite to the insertion direction I of the shaft 11 to form a bent portion 2d, which is in a state of biting into the sealing member 6.

  The plate 2 is formed of a rigid body, for example, a metal such as stainless steel or a resin. As shown in FIG. 3, the plate 2 has a circular contour. The plate 2 has an opening O, and as shown in FIGS. 1 and 2, the inner edge 2 a of the plate 2 forming the opening O is provided concentrically with a common axis C with the contour of the plate 2. ing.

As described above, the bent portion 2d is formed on the inner edge 2a of the plate 2 over the entire circumference of the inner edge 2a. In the present embodiment, when the gasket 1 is attached, the shaft 11 is inserted into the opening O as shown in FIG. In the present embodiment, the shaft 11 is provided on the upper side of the gasket 1 shown in FIGS. 1 and 2 so that its axis coincides with the axis C of the plate 2. The shaft 11 is attached by being moved downward. That is, the insertion direction I in the present embodiment is downward in FIGS. 1 and 2, and the reverse direction R of the insertion direction I is upward. In the present embodiment, the mounting of the gasket 1 and the shaft 11 will be described so that the shaft 11 is moved with respect to the gasket 1, but this is only the relative movement direction and relative movement of the shaft 11 with respect to the gasket 1. Needless to say, even if the gasket 1 is actually moved and attached to the shaft 11, the same explanation can be made.
The bent portion 2d is formed by bending the inner edge 2a of the plate 2 in the reverse direction R of the insertion direction I of the shaft 11 by, for example, pressing.

  In the present embodiment, the insertion direction I faces the inside of the device on which the gasket 1 and the shaft 11 are provided, and the reverse direction R faces the outside of the device. That is, the shaft 11 is attached so as to be inserted from the outside to the inside of the device. A fluid such as oil is provided inside the device.

  As shown in FIGS. 1 and 2, a plurality of inner through-holes 2 b are formed in the vicinity of the inner edge 2 a of the plate 2 at equiangular intervals in the circumferential direction and at substantially the same positions from the axis C. A plurality of outer through-holes 2c are opened at positions that are radially outward from the inner through-holes 2b and are equiangularly spaced in the circumferential direction at substantially the same positions from the axis C. The inner through hole 2b and the outer through hole 2c can be formed by press working or the like.

A flat flat plate portion 2h is formed in a portion of the plate 2 between the inner through hole 2b and the outer through hole 2c, and a mesh is formed on the flat plate portion 2h as shown by hatching in FIG. Thus, the filter 4 is configured. The mesh forming the filter 4 can be formed by etching or the like.
An inclined portion 2f is formed on the outer side of the plate 2 in the radial direction of the outer through hole 2c so as to be inclined with respect to the flat plate portion 2h. The radially outer side of the inclined portion 2 f is an outer edge portion 2 g that is the outermost end of the plate 2.

  A sealing member 6 is joined to the inner edge 2a of the plate 2 forming the opening O. The sealing member 6 is formed from an elastic body, for example, an elastomer. The sealing member 6 is provided in an annular shape so as to cover the bent portion 2d and the inner through hole 2b along the circumferential direction on the inner edge 2a of the plate 2, and thereby the outer end 6g of the sealing member 6 is provided. Is provided so as to be positioned on the radially outer side of the inner through-hole 2b. As a result, the bent portion 2d of the plate 2 is in a state of biting into the sealing member 6.

  The sealing member 6 is provided with a lip 6a that extends radially inward over the entire circumference from a portion located further radially inward of the inner edge 2a. In the present embodiment, the lip 6a is provided so as to extend obliquely in the reverse direction R from the inner edge 2a in a sectional view before being attached to the shaft 11 shown in FIG. The tip 6d of the lip 6a is provided concentrically with the axis C common to the contour of the plate 2 and the inner edge 2a. The inner diameter of the tip portion 6d is formed to be smaller than the outer diameter of the shaft 11 inserted at the time of attachment.

  In the present embodiment, the sealing member 6 is bonded to the plate 2 as follows without using an adhesive. That is, a mold corresponding to the outer shape of the sealing member 6 is provided so as to enclose the inner edge 2a and the inner through hole 2b of the plate 2, and an elastomer or the like that is a material of the sealing member 6 sealed in the mold is used. The sealing member 6 is formed so as to cover the inner edge 2a and the inner through hole 2b and to enter the inner through hole 2b. Thereby, the sealing member 6 is integrated so that the elastomer positioned on each of the insertion direction I side and the reverse direction R side of the plate 2 is integrated with the inner side of the inner edge 2a via the inner through hole 2b. It is formed.

  The loop part 7 is an annular member, and is formed of an elastic body, for example, an elastomer. The loop portion 7 is joined to a portion between the flat plate portion 2 h and the inclined portion 2 f of the plate 2, more specifically to a portion where the outer through hole 2 c is provided, and is disposed on both surfaces of the plate 2. .

  The method of joining the loop portion 7 is not limited, but may be the following method, for example. That is, a mold corresponding to the outer shape of the loop portion 7 is provided so as to enclose the outer through hole 2c of the plate 2, and an elastomer or the like that is a material of the loop portion 7 enclosed in the mold is placed in the outer through hole 2c. The loop portion 7 is formed so as to penetrate. Thereby, the loop part 7 is formed so that the elastomer located in each of the insertion direction I side and the reverse direction R side of the plate 2 is integrated through the outer through-hole 2c.

  The gasket 1 as described above is attached as shown in FIG. More specifically, the outer edge 2 g of the plate 2 is joined to the structure 10. Further, as described above, the shaft 11 is provided on the upper side of the gasket 1 so that its axis coincides with the axis C of the plate 2 and is moved downward with respect to the gasket 1. It is attached.

  When the shaft 11 is attached, the shaft 11 is inserted into the opening O of the gasket 1 so that, after the attachment to the shaft 11, the shape of the lip 6a after the attachment is shown by a two-dot chain line in FIG. The lip 6a is elastically deformed, and the extending direction of the lip 6a is changed to the insertion direction side I.

  More specifically, as described above, the inner diameter of the tip portion 6d of the lip 6a is formed to be smaller than the outer diameter of the shaft 11, so that when the shaft 11 is inserted into the opening O, the shaft 11 And the lip 6a abut. When the shaft 11 is inserted deeper into the opening O, the lip 6 a is turned in the insertion direction I due to friction between the shaft 11 and the sealing member 6. Thereby, after the attachment to the shaft 11, the lip 6a extends in the insertion direction I on the side opposite to the reverse direction R which is the bending direction of the bent portion 2d, and the surface on the radially inner side of the lip 6a before the attachment. The front inner surface 6b before mounting is directed to the outer side in the radial direction of the lip 6a after mounting, and the outer surface 6c before mounting, which is the outer surface in the radial direction of the lip 6a before mounting, is the lip 6a after mounting. The direction is changed so as to face inward in the radial direction.

  In the present embodiment, the shaft 11 does not rotate around the axis C relative to the gasket 1 and does not move linearly along the axis C after attachment. That is, the sealing member 6 is in close contact with the surface 11 a of the shaft 11 without moving relative to the shaft 11.

  In FIG. 2, the arrows indicate the direction of fluid flow. When the fluid located on the lower side of the gasket 1 passes through the filter 4 of the gasket 1, foreign matters such as metal pieces, dust and impurities are filtered, and then passes through the gap between the shaft 11 and the structure 10. 2 is used for lubrication of equipment provided above the gasket 1.

  Next, the effect of the gasket 1 will be described.

According to the above configuration, the sealing member 6 is joined to the plate 2 without using an adhesive, and the bent portion 2d bent in the reverse direction R of the insertion direction I of the shaft 11 is sealed. The member 6 is in a state of being bitten, that is, locked to a portion of the sealing member 6 located on the outer side in the circumferential direction of the bent portion 2d.
More specifically, in FIGS. 1 and 2, the bent portion whose reverse direction R of the plate 2, that is, the portion of the sealing member 6 located on the upper side and on the left side of the bent portion 2 d is the radially outer surface of the bent portion 2 d. The portion is abutted and locked to the outer surface 2e, and the portion is prevented from moving to the right side of the bent portion 2d.
For this reason, the shaft 11 is inserted into the opening O in the insertion direction I, the shaft 11 and the sealing member 6 slide, and the frictional force in this sliding causes the sealing member 6, particularly the plate 2. Thus, even if a force pulled downward in the insertion direction I acts on the portion of the shaft 11 located on the opposite side of the insertion direction I, it can resist this. Therefore, even when no adhesive is used, it is possible to realize the gasket 1 capable of firmly joining the sealing member 6 to the inner edge 2a of the opening O.

  Further, since the bent portion 2d is formed over the entire circumference of the inner edge 2a, it can resist the force with which the sealing member 6 is pulled in the insertion direction I at any position of the inner edge 2a. Even when no agent is used, it is possible to realize the gasket 1 capable of firmly joining the sealing member 6 to the inner edge 2a of the opening O.

  In addition, the lip 6a of the sealing member 6 extends obliquely from the inner edge 2a toward the direction R opposite to the insertion direction I in a cross-sectional view before being attached to the shaft 11. 2 is positioned on the opposite side of the insertion direction I of the shaft 11 with respect to 2, that is, on the side where the lip 6 a extends, and is attached by moving toward the insertion direction I due to friction between the shaft 11 and the sealing member 6. 6a is turned in the insertion direction I from the extending direction in the original form before the attachment, and after the attachment to the shaft 11, the extending direction of the lip 6a is changed to the insertion direction I side. In the state after the attachment, the lip 6a is strongly pressed against the surface 11a of the shaft 11 by the elastic restoring force of the lip 6a returning to the original shape. Therefore, it becomes possible to improve sealing performance.

  In particular, in the present embodiment, as shown in FIG. 2, the fluid flows in the reverse direction R from the side where the lip 6 a extends after attachment. That is, after the attachment, the fluid hits the surface 6b facing the radially outer side of the lip 6a and acts to press the surface 6c opposite to the surface 6b of the lip 6a against the surface 11a of the shaft 11. That is, the lip 6a is strongly pressed against the surface 11a of the shaft 11 also by the effect of this self-sealing, so that the sealing performance can be further enhanced.

  In addition, even when no adhesive is used, the filter 1 is configured so that the sealing member 6 can be firmly joined to the inner edge 2a of the opening O and the filter 4 is configured. Therefore, the filter is not clogged by the adhesive. .

(First Modification of Embodiment)
Next, the 1st modification of the gasket 1 shown as the said embodiment is demonstrated using FIG. FIG. 4 is a perspective view of the plate 22 in the gasket of the first modification. The gasket of the first modification is different from the gasket 1 in the above embodiment in that a plurality of inner through holes 22b are formed at intervals along the inner edge 22a.

  In the first modified example, three inner through holes 22b are formed in the vicinity of the inner edge 22a of the plate 2. Each of the plurality of bent portions 22d is provided so as to extend in the circumferential direction between the inner through holes 22b adjacent to each other, and is divided in the circumferential direction at the position of the inner through hole 22b. Is provided.

It goes without saying that the first modification has the same effect as that of the above embodiment.
In the first modification, an inner through hole 22b is formed in a portion where the circumferentially bent portion 22d is not provided. For this reason, when a shaft is inserted into the gasket of the first modified example and a force pulled in the insertion direction I is applied to the sealing member joined to the inner edge 22a of the plate 22, it is bent in the circumferential direction. In the portion where the portion 22d is provided, the bent portion 22d resists this, and in the portion where the bent portion 22d is not provided, the sealing member on the insertion direction I side and the sealing member on the reverse direction R side. The inner part of the inner through hole 22b of the sealing member in which the two are integrated is resisted by the force for integrating the sealing members on both sides.
Thereby, in particular, in the configuration of the first modification, the amount of material required for the production of the plate 22 can be reduced without impairing the bonding force of the sealing member, and therefore the production cost of the gasket is reduced. be able to.

(Second Modification of Embodiment)
Next, the 2nd modification of the gasket 1 shown as the said embodiment is demonstrated using FIG. FIG. 5 is a cross-sectional view of the gasket 31 of the second modification. The gasket 31 of the second modified example is different from the gasket 1 in the above embodiment in that a bent portion 32d is formed by bending a plurality of inner edges 32a of the plate.

  The bent portion 32d provided on the inner edge 32a of the plate 32 constituting the gasket 31 includes a first bent portion 32i and a second bent portion 32j. That is, a first bent portion 32i is provided on the inner edge 32a of the plate 32 so as to be bent in the reverse direction R of the shaft insertion direction I, and the end portion of the first bent portion 32i on the reverse direction R side is provided. Further, the second bent portion 32j is provided by being bent outward in the radial direction.

It goes without saying that the second modification has the same effect as that of the above embodiment.
In the second modified example, in particular, the inner edge 32a of the plate 32 is bent a plurality of times to form a bent portion 32d, so that the sealing member 36 is more resistant to the force of pulling in the insertion direction I. Therefore, it is possible to realize the gasket 31 that can be strongly resisted and that can firmly join the sealing member 36 to the inner edge 32a of the opening O even when no adhesive is used.

(Third Modification of Embodiment)
Next, the 3rd modification of the gasket 1 shown as the said embodiment is demonstrated using FIG. FIG. 6 is an explanatory diagram of a usage state of the gasket 41 of the third modification. The gasket 41 of the third modified example is different from the gasket 1 in the above-described embodiment. The sealing member 46 is obliquely viewed from the inner edge 42a in the insertion direction I in a cross-sectional view before being attached to the shaft 11. The difference is that a lip 46a is provided.

  Also in the third modified example, the inner diameter of the tip 46d of the lip 46a is formed to be smaller than the outer diameter of the shaft 11 as in the above embodiment. Therefore, when the shaft 11 is inserted into the opening O, the shaft 11 and the inner surface 46b of the lip 46a abut. Here, in the third modification, the lip 46a of the sealing member 46 is provided so as to extend in the insertion direction I. Therefore, even if the shaft 11 is inserted deeper into the opening O, the shaft 11 The extending direction of the lip 46a is not changed by the friction between the sealing member 46 and the sealing member 46. That is, even after the attachment to the shaft 11, the lip 46a is still stretched in the insertion direction I.

It goes without saying that the third modification has the same effect as that of the above embodiment.
In the third modification, in particular, the lip 46a of the sealing member 46 extends obliquely from the inner edge 42a toward the insertion direction I in a sectional view before attachment to the shaft 11, When the shaft 11 is positioned on the opposite side R of the insertion direction I of the shaft 11 with respect to the plate 42, that is, on the opposite side of the direction in which the lip 46a extends, and is moved and attached toward the insertion direction I, the lip 46a Does not fall in the reverse direction R from the stretching direction in the original shape before mounting. Thereby, the pulling force acting on the sealing member 46 during insertion of the shaft 11 is suppressed, and the sealing member 46 can be firmly joined to the inner edge 42a of the opening O and can be easily attached to the shaft 11. A simple gasket 41 can be realized.
Further, as described above, when the shaft 11 is mounted in the insertion direction I, the lip 46a does not twist in the direction opposite to the extending direction in the original shape before mounting, and the lip before and after mounting. Since the extending direction of 46a does not change, it is possible to suppress the reversing of the extending direction of the lip 46a by the elastic restoring force that the lip 46a tries to return to the original shape while using the gasket 41 after the mounting. Thereby, it is possible to realize a gasket 41 that functions stably while suppressing malfunction after mounting.

(Fourth modification of the embodiment)
Next, the 4th modification of the gasket 1 shown as the said embodiment is demonstrated using FIG. FIG. 7 is a plan view of the gasket 51 of the fourth modified example. The gasket 51 of the fourth modified example is different from the gasket 1 in the above-described embodiment in that a mesh is not formed on the flat plate portion 52h of the plate 52.
That is, the gasket 51 of the fourth modified example is not a filter, and partitions between spaces on both sides of the gasket 51.
It goes without saying that the fourth modification has the same effect as that of the above embodiment.

(Fifth Modification of Embodiment)
Next, the 5th modification of the gasket 1 shown as the said embodiment is demonstrated using FIG. FIG. 8 is a cross-sectional view of the gasket 61 of the fifth modification. The gasket 61 of the fifth modification is different from the gasket 1 in the above embodiment in the height position where the lip 66a is provided.

  More specifically, in the fifth modification, the lip 66a has a height position opposite to the direction in which the bent portion 62d is bent, that is, the lower side in FIG. A base 66e is provided so as to extend radially inward from a base 66e provided on the insertion direction I side.

Needless to say, the fifth modification has the same effects as those of the above embodiment.
In the fifth modification, the lip 66a is provided away from the inner edge 62a on the opposite side to the direction in which the bent portion 62d is bent. Even if a force pulled toward the surface acts, the influence on the portion of the sealing member 66 located above the plate 62 can be reduced, and therefore the sealing member 66 can be more firmly joined to the inner edge 62a of the opening O. It is.

  The gasket of the present invention is not limited to the above-described embodiment and each modification described with reference to the drawings, and various other modifications can be considered within the technical scope thereof.

  For example, in the above embodiment and each modification, the cross section of the shaft 11, the shape of the sealing member, the shape of the loop portion, the contour of the plate, and the contour of each part constituting the plate are circular, but these shapes May not be circular, for example, it may be rectangular or square.

  Moreover, in the said embodiment and each modification, although the structure 10 and the axis | shaft 11 to which a gasket is attached were demonstrated by what was shown by FIG. 2, FIG. 6, the shape of these structures 10 and the axis | shaft 11, etc. Needless to say, other configurations may be provided.

  Other than this, as long as the gist of the present invention is not deviated, it is possible to select the configuration described in the above embodiment and each modification, or to appropriately change to another configuration.

1, 31, 41, 51, 61 Gasket 2, 22, 32, 42, 52, 62 Plate 2a, 22a, 32a, 42a, 62a Inner edge 2d, 22d, 32d, 42d, 62d Bent part 4 Filter 6, 36, 46 , 66 Sealing members 6a, 46a, 66a Lip 11 Axis I Insertion direction R Reverse direction O Opening

Claims (5)

A plate with an opening through which the shaft is inserted;
A sealing member that is provided on an inner edge of the plate forming the opening and seals the opening in contact with the shaft;
With
The gasket, wherein the inner edge of the plate is bent in a direction opposite to the insertion direction of the shaft to form a bent portion and bite into the sealing member.   The gasket according to claim 1, wherein the bent portion is formed over the entire circumference of the inner edge.   The gasket according to claim 1, wherein a plurality of the bent portions are formed at intervals along the inner edge.   The gasket according to any one of claims 1 to 3, wherein the bent portion is formed by bending the inner edge of the plate a plurality of times.   The gasket according to any one of claims 1 to 4, wherein a filter is formed by forming a mesh on the plate.

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