JP7390018B2 - sealing device - Google Patents

Description

The present invention provides a bearing unit that combines a bearing section having an outer member and an inner member that rotate coaxially relative to each other, and a constant velocity joint connected to the bearing section, in which the outer member and the inner member are connected to each other. The present invention relates to a sealing device configured by combining a first seal member that seals between the bearing portion and the constant velocity joint, and a second seal member that is provided at the connection portion between the bearing portion and the constant velocity joint and seals the connection portion.

Examples of the above-mentioned sealing device include those disclosed in Patent Document 1 and Patent Document 2 listed below. Each of these includes a first seal member that seals between the outer member and the inner member that constitute the bearing portion, and a second seal member that is provided at the connection portion between the bearing portion and the constant velocity joint and seals the connection portion. is provided.

JP2009-293686A JP2009-79675A

However, the example shown in Patent Document 1 and FIGS. 3 and 4 includes a seal 12 (first seal member) that seals between the inner ring and the outer member, and seals 23 and 26 (first seal member) that make elastic contact with the peripheral surface of the constant velocity joint. 2 seal members) are completely separated from each other, there is a risk that muddy water or the like may enter from the separated parts. In addition, since the first seal member and the second seal member are provided separately, it is difficult to determine the assembly position of the second seal member, and the second seal member connects the cylindrical portion of the second seal member to the inner ring. Since it is fixed simply by fitting, it can be said that this is a fixed structure in which there is concern about maintaining the fixed state.

Further, in the example of Patent Document 2 and FIG. 4, the cylindrical portion of the slinger 91 of the seal device 90 (first seal member) and the core metal of the seal member 280 (second seal member) are arranged so as to overlap, and the inner member It is doubly fitted to the outer circumferential surface of. However, in this case, it is difficult to adjust the assembly position (press-fitting position) of the slinger and core metal on the outer circumferential surface, and since the mating parts are two metals, scratches are likely to occur on the surface during press-fitting, and muddy water can easily spill onto the bearing. The problem is that there is a risk of internal intrusion. Further, after the sealing member 280 is assembled to the inner member by press-fitting, the sealing device 90 is inserted, but the sealing member 280 may be tilted after being press-fitted, and there is a problem that the sealing device 90 is also inserted tilted. .

The present invention has been made in view of the above-mentioned circumstances, and an object of the present invention is to provide a sealing device that can improve sealing performance and that can easily position and fix the second member in the axial direction.

The sealing device according to the present invention is a bearing unit that combines a bearing portion including an outer member and an inner member that rotate coaxially relative to each other, and a constant velocity joint connected to the bearing portion. A sealing device configured by a combination of a first seal member that seals between the bearing portion and the constant velocity joint, and a second seal member that is provided at a connection portion between the bearing portion and the constant velocity joint and seals the connection portion. The first seal member includes a slinger attached to the inner member, a core bar attached to the outer member, and a seal lip made of an elastic body that is fixed to the core bar and comes into elastic contact with the slinger, The slinger includes a slinger cylindrical portion that is fitted into the inner member, and a connecting portion that extends in one radial direction from an axially outer end of the slinger cylindrical portion along an axially outer end surface of the inner member. , a slinger flange portion formed by being folded back from an end of the connecting portion and extending to the other side in the radial direction, and the second seal member includes a second core metal and a slinger collar portion formed on the second core metal. a second seal lip made of an elastic body that is fixed and comes into elastic contact with the circumferential surface of the constant velocity joint; a cored metal flange extending from an axially inner end of the cylindrical portion and fixed between the connecting portion and the end surface of the inner member; and a cored metal flange extending from the axially outer end of the cylindrical cored portion. It is characterized in that it has a bent part bent inwardly, and a seal part made of an elastic body is interposed between the connecting part and the core metal collar part.
According to the above configuration, the seal portion is interposed between the connecting portion where the first seal member and the second seal member fit together and the core metal flange portion, and the fitting portion does not become a metal-to-metal fit. , the sealing performance can be improved. Furthermore, since the fitting portion does not fit metal to metal, scratches are less likely to occur on the surface during press fitting, and sealing performance can be improved. Furthermore, since the first seal member and the second seal member are press-fitted and fixed against each other, positioning in the axial direction is facilitated, and the first seal member is press-fitted and is sandwiched between the connecting portion and the end surface of the inner member. The second seal member can also be easily fixed.

According to the sealing device of the present invention, the sealing performance can be improved, and the second member can be easily positioned and fixed in the axial direction.

1 is a vertical cross-sectional view schematically showing an example of a bearing unit to which a sealing device according to an embodiment of the present invention is applied. FIG. 2 is an enlarged view of section X in FIG. 1. FIG. (a) and (b) are partially enlarged views showing main parts of a modification of the same embodiment. (a) and (b) are partially enlarged views showing main parts of still another modification of the same embodiment.

Embodiments of the present invention will be described below based on the drawings.
The sealing device in this embodiment is attached to a bearing unit 100 that is a combination of a bearing section 1 having an outer member and an inner member that rotate relatively coaxially, and a constant velocity joint 7 connected to the bearing section 1. It is something. The sealing device 8 includes a first seal member 9 that seals between the outer member 2 and the inner member 5, and a second seal member 10 that is provided at the connection portion between the bearing portion 1 and the constant velocity joint 7 and seals the connection portion. It is composed of a combination of.
The first seal member 9 includes a slinger 90 attached to the inner member 5 , a core bar 91 attached to the outer member 2 , and a seal lip 92 made of an elastic material and fixed to the core bar 91 and in elastic contact with the slinger 90 . , the second seal member 10 includes a second core bar 101 and a second seal lip 102 made of an elastic body that is fixed to the second core bar 101 and comes into elastic contact with the outer circumferential surface 7aa of the constant velocity joint 7. A seal portion 93 made of an elastic body is interposed between the connecting portion 90b of the metal core 90 and the metal core flange portion 101a of the second metal core 101.
The details will be explained below.

First, FIG. 1 shows a bearing unit 100 which is a combination of a bearing part 1 that rotatably supports a vehicle wheel (not shown) and a constant velocity joint 7 connected to the bearing part 1. The bearing section 1 generally includes an outer ring 2 as an outer member, a hub ring 3, an inner ring member 4 that is fitted and integrated with the vehicle body side of the hub ring 3, the outer ring 2, the hub ring 3, and the inner ring member 4. and two rows of rolling elements (balls) 6 interposed between. In this example, the hub ring 3 and the inner ring member 4 constitute an inner ring 5 as an inner member. The outer ring 2 is fixed to a vehicle body (not shown) of an automobile. Further, a drive shaft 70 is coaxially spline-fitted to the hub wheel 3, and the drive shaft 70 is connected to a drive source (drive transmission unit) (not shown) via a constant velocity joint 7. The drive shaft 70 is integrated with the hub wheel 3 by a nut 71, and the hub wheel 3 is prevented from coming off from the drive shaft 70. The inner ring 5 (hub ring 3 and inner ring member 4) is rotatable around an axis L with respect to the outer ring 2, and the outer ring 2 and the inner ring 5 constitute two members that rotate relatively. An annular bearing space S is formed between the members. In the bearing space S, two rows of rolling elements 6... are held in a retainer 6a, and the bearing rings 2a of the outer ring 2, the hub ring 3, and the bearing rings 3a, 4a of the inner ring member 4 can roll. It has been intervened. The hub ring 3 has a cylindrical hub ring main body 30 and a hub flange 32 formed to extend radially outward from the hub ring main body 30 via an upright base 31 . The wheels are attached and fixed by nuts (not shown). Hereinafter, the side facing the wheels along the axis L direction (the side facing left in FIG. 1) will be referred to as the wheel side, and the side facing the vehicle body (the side facing right in FIG. 1) will be referred to as the vehicle body side.

Sealing devices 80 and 8 are installed between the outer ring 2 and the hub ring 3 and between the outer ring 2 and the inner ring member 4, and both ends of the bearing space S along the axis L direction are sealed. Of these sealing devices 80, 8, the sealing device according to the present embodiment is applied as the sealing device 8 on the vehicle body side in which the constant velocity joint 7 connected to the bearing portion 1 is disposed.

As shown in FIG. 2, the sealing device 8 includes a first sealing member 9 and a second sealing member 10, which are combined to form a single sealing device. A stepped portion 40 is formed on the outer side of the inner ring member 4 in the direction of the axis L, specifically, at a corner of the outer peripheral surface 4b of the inner ring member 4 on the vehicle body side. The sealing device 8 is attached to the outer circumferential surface 4b, the stepped portion 40, and the connecting portion 7a, and the first sealing member 9 is attached between the outer ring 2 and the inner ring member 4 to seal the space between the outer ring 2 and the inner ring member 4. However, the second seal member 10 is configured to seal the connection portion between the constant velocity joint 7 and the bearing portion 1. The constant velocity joint 7 in the illustrated example includes a housing main body portion 7b connected to a drive source, and a connecting portion 7a to the bearing portion 1.

The first seal member 9 includes a slinger 90 attached to the inner ring member 4 , a core metal 91 attached to the outer ring 2 , and a seal lip 92 made of an elastic material that is fixed to the core metal 91 and comes into elastic contact with the slinger 90 . There is. The slinger 90 includes a slinger cylindrical portion 90a that is fitted to the outer circumferential surface 4b of the inner ring member 4 on the vehicle body side, and an end surface 4c of the inner member 5 that extends from the outer end 90aa in the axis L direction of the slinger cylindrical portion 90a to the outer end surface 4c of the inner member 5 in the axis L direction. A connecting portion 90b extending in one radial direction, that is, inwardly along the radial direction, and a slinger collar portion formed by being folded back from an end 90ba on the inner diameter side of the connecting portion 90b and extending in the other radial direction, that is, outwardly. 90c. The core metal 91 has a cylindrical portion 91a that is fitted into the inner circumferential surface 2b of the outer ring 2 on the vehicle body side, and an inward flange portion 91b that extends radially inward from an end 91aa of the cylindrical portion 91a. The seal lip 92 is made of rubber or the like that is integrated with the core metal 91 by insert molding, and includes a seal lip base 92a arranged on the vehicle body side surface of the slinger 90, and three lips 92b, 92c that contact the slinger 90. , 92d. The lip 92d closest to the bearing space S is a radial lip, and elastically contacts the outer peripheral surface of the slinger cylindrical portion 90a of the slinger 90. Moreover, the lips 92b and 92c are axial lips, and elastically contact the side surface of the slinger collar 90c on the bearing space S side of the slinger. The two-dot chain lines of the lips 92b, 92c, and 92d in FIG. 2 indicate the original shapes of the lips 92b, 92c, and 92d before elastic deformation. An annular magnetic encoder 94 made of magnetic rubber and having north and south poles alternately magnetized is provided on the outer surface 90ca of the slinger collar 90c. The magnetic encoder 94 is formed by bonding magnetic powder such as ferrite with a rubber material, and is vulcanized and bonded to the slinger collar 90c. The magnetic encoder 94 is configured to detect the rotation of the wheels of the automobile, etc. using a magnetic sensor (not shown) arranged opposite to the magnetic encoder 94 .

The second seal member 10 includes a second core bar 101 that is sandwiched and fixed between the connecting portion 90b and the end surface 4c of the inner ring member 4, and an outer peripheral surface 7aa of the constant velocity joint 7 that is fixed to the second core bar 101. A second seal lip 102 made of an elastic material is provided. The second cored bar 101 extends from a cored cylindrical part 101b provided on the inner diameter side of the connecting part 90b and an end part 101ba on the inner side in the axis L direction of the cored cylindrical part 101b, and extends from the end face of the connecting part 90b and the inner ring member 4. 4c, and a bent portion 101c that is bent radially inward from the outer end 101bb of the cylindrical cored portion 101b in the axis L direction. The second seal lip 102 is provided at the end 101ca on the inner diameter side of the bent portion 101c, and the tip 102b of the lip body 102a is formed in a rectangular shape as shown by the two-dot chain line, and is connected to the constant velocity joint 7. It is provided so as to be in elastic contact with the outer circumferential surface 7aa of 7a. A seal portion 93 made of an elastic material is interposed between the connecting portion 90b and the metal core flange portion 101a. The seal portion 93 in the illustrated example is made of magnetic rubber, extends from an end portion 94a on the inner diameter side of the magnetic encoder 94, wraps around and is fixed between the connecting portion 90b and the metal core flange portion 101a. That is, it can be said that the seal portion 93 shown in FIG. 2 is configured as a part of the magnetic encoder 94. The second cored metal 101 is press-fitted until the cored metal cylindrical portion 101b is fitted into the stepped portion 40 and the cored metal flange portion 101a abuts against the end surface 4c of the inner ring member 4. Specifically, the stepped portion 40 is formed at a corner of the outer circumferential surface 4b of the inner ring member 4 on the vehicle body side, and is composed of an end surface 4c on the corner side and a stepped surface 4d, and a cylindrical core metal portion is formed on the stepped surface 4d. 101b is fitted.

Although not shown, an elastic material may be interposed between the seal portion 93 and the metal core flange portion 101a. In this case, the elastic material may be a sealant, liquid rubber, or the like that fills the gap between the core metal collar portion 101a and the connecting portion 90b. In this case, it is possible to further improve the sealing performance between the seal portion 93 and the metal core flange portion 101a.

According to the above configuration, the sealing device 8 is composed of the first sealing member 9 and the second sealing member 10 which are separate members, but the fitting portion between the first sealing member 9 and the second sealing member 10 is Since the sealing part 93 is interposed between the connecting part 90b and the core metal flange 101a, the gap between the core metal flange 101a and the connecting part 90b can be sealed, and dust, muddy water, etc. can be prevented from entering the bearing space S. Therefore, the sealing performance can be improved. In addition, the presence of this seal portion 93 prevents the fitting portion between the first seal member 9 and the second seal member 10 from becoming a metal-to-metal fit, making it difficult for scratches to occur on the surface during press-fitting, and improving sealing performance. can be improved. Further, according to the above configuration, the seal portion 93 is a part of the magnetic encoder 94, and the magnetic encoder 94 is arranged to extend around the inner diameter side end 90ba of the slinger collar portion 90c, so that the magnetized surface is It can be made wider and the degree of freedom in mounting the magnetic sensor (not shown) can be improved.

Further, when the second core metal 101 is installed, if the core metal cylindrical part 101b is fitted into the stepped surface 4d of the stepped part 40 as described above and the core metal collar part 101a is press-fitted to the position where it abuts against the end surface 4c, the second core metal 101 can be installed. The seal member 10 can be mounted at a desired position. At this time, the second core metal 101 may be press-fitted along the stepped surface 4d, so the press-fitting position can be determined easily. Therefore, the second seal member 10 can be mounted at an appropriate position. Furthermore, even if the cylindrical core portion 101b is twice as large as the slinger cylindrical portion 90a and easily tilts as shown in the figure, the cylindrical core portion 101b and the collar portion 101a of the core may be slightly larger than the step surface 4d and the end surface 4c. It can be installed along each side. Therefore, it is possible to prevent the second seal member 10 from tilting after being press-fitted. Furthermore, the sealing device 8 first press-fits the second seal member 10 into the step surface 4d and then press-fits the first seal member 9 into the outer peripheral surface 4b of the inner ring member 4. Then, the first seal member 9 is press-fitted toward the end surface 4c of the inner ring member 4 until it abuts against the core metal flange 101a, with the metal core flange 101a and the connecting portion 90b overlapping and with the seal portion 93 interposed. As the first sealing member 9 can be fixed in place, positioning of the first sealing member 9 in the direction of the axis L is easy. In addition, the second seal member 10 is in a state where the core metal collar portion 101a is sandwiched between the connecting portion 90b and the end surface 4c of the inner ring member 4 due to the press-fitting of the first seal member 9, so that the second seal member 10 is fixed. is stable and easy to install.

In the sealing device 8, when the drive shaft 70 rotates around the axis L, the inner ring 5, slinger 90, and second seal member 10 also rotate around the axis L. During this rotation, the lip (radial lip) 92d is elastically in sliding contact with the outer peripheral surface of the slinger cylindrical portion 90a, and the lips 92b, 92c are in elastic relative sliding contact with the slinger collar portion 90c. Therefore, muddy water or the like can be prevented from entering the bearing space S from the outside through the first seal member 9. Further, leakage of lubricant such as grease filled in the bearing space S to the outside is also prevented. When the drive shaft 70 further rotates around the axis L, the second seal lip 102 elastically comes into relative sliding contact with the outer peripheral surface 7aa of the connecting portion 7a due to the rotation of the inner ring 5. Therefore, it is possible to prevent dust, muddy water, etc. from entering through the gap between the end surface 4c of the inner ring member 4 adjacent to the connecting portion 7a and the connecting portion 7a.

3(a), (b) and 4(a), (b) show modified examples of this embodiment. In the same parts as in the example of FIG. 2 above, the same reference numerals are given to the common parts, and the explanation thereof will be omitted.
First, the sealing portion 93 of the sealing device 8 shown in FIG.
Although the shape of the protrusion 93a is not particularly limited, it may be in the shape of a curved bead as shown in the figure, or may be in the shape of a cone. In this way, the protrusion 93a that comes into elastic contact with the surface of the core metal flange 101a on the vehicle body side opposite to the end surface 4c side allows the slinger 90 of the first seal member 9 and the second core metal 101 of the second seal member 10 to The sealing performance of the fitting portion can be further improved.

Further, the sealing device 8 shown in FIG. 3(a) differs from the example shown in FIG. 2 in the configuration of the second seal lip 102. The second seal lip 102 shown here is disposed so as to cover the outer end 101bb of the cored metal cylindrical portion 101b in the axis L direction and the constant velocity joint 7 side of the bent portion 101c, and the tip portion 102b is as shown in FIG. It is formed thicker than the example shown in . The tip portion 102b is elastically deformed because it comes into elastic sliding contact with the outer circumferential surface 7aa of the connecting portion 7a, but the shape before elastic deformation is formed into a shape having an inclined surface as shown by the two-dot chain line. ing.
According to such a configuration, the second seal lip 102 can be firmly fixed to the bent portion 101c.

Further, the sealing device 8 shown in FIG. 3A differs from the example shown in FIG. 2 in that the cylindrical core 101b of the second core 101 is not fitted into the stepped surface 4d of the stepped portion 40. As shown here, even if the cored metal cylindrical part 101b is not fitted to the step surface 4d, if the cored metal flange part 101a is press-fitted to the position where it abuts the end surface 4c, the second seal member 10 can be attached to the desired position. can. At this time, the second core metal 101 may be press-fitted along the stepped surface 4d, so the press-fitting position can be determined easily. Therefore, the second seal member 10 can be mounted at an appropriate position. Also in this case, the second seal lip 102 described above can prevent dust, muddy water, etc. from entering the gap between the connecting portion 7a and the end surface 4c adjacent to the connecting portion 7a.

The sealing device 8 shown in FIG. 3(b) is different from the above example in that an elastic material 95 is interposed between the metal core flange 101a and the end surface 4c of the inner ring member 4. The elastic material 95 may be a rubber protrusion, a sealant, liquid rubber, or the like that fills the gap between the metal core flange 101a and the end surface 4c of the inner ring member 4. In this case, the sealing performance between the metal core flange 101a and the end surface 4c of the inner ring member 4 can be further improved.

Further, the sealing device 8 shown in FIG. 3(b) differs from the above example in the configuration of the second seal lip 102. The second seal lip 102 shown here is provided over the circumferential surface of the inner diameter side end 101ca of the bent portion 101c, and the tip end 102b of the lip body 102a has a wall thickness similar to the example shown in FIG. 3(a). is formed.
With such a configuration as well, the second seal lip 102 can be firmly fixed to the bent portion 101c.

Subsequently, the sealing device 8 shown in FIG. An example is shown in which the elastic material 95 disposed in the upper and lower parts are integrally formed. In this case, the magnetic encoder 94 does not extend to the inner diameter end 90ba of the slinger collar 90c.
Even if the seal portion 93 and the elastic material 95 are integrally formed in this manner and cover the end 101aa of the core metal flange 101a of the second core 101 on the slinger 90 side, the seal portion 93 and the elastic material 95 can be connected to the core metal flange 101a. The gap between the portion 90b and the gap between the metal core flange 101a and the end surface 4c can be sealed.

The sealing device 8 shown in FIG. 4(b) differs from the example shown in FIG. 2 in that an elastic member 95 is provided between the metal core flange 101a and the end surface 4c of the inner ring member 4. The shape of the elastic material 95 differs from FIGS. 3(b) and 4(a). In this example, the end 101aa of the core flange 101a of the second core 101 on the slinger 90 side has a notched shape, and an elastic material 95 is interposed in the notch. Further, a protrusion 95a of a protrusion is provided at a portion of the elastic member 95 that comes into contact with the end surface 4c. By providing the projections 95a on the elastic member 95 in this manner, the gap between the cored metal collar portion 101a and the end surface 4c can be more firmly sealed.

Further, the sealing device 8 shown in FIG. 4(b) differs from the above example in the configuration of the second seal lip 102. In the second seal lip 102 shown here, the dimension of the bent portion 101c is set shorter than in other examples, but the second seal lip 102 is a longer lip than that shown in FIG. 4(a). ing. The second seal lip 102 having such a configuration can also prevent dust, muddy water, etc. from entering the gap between the connecting portion 7a and the end surface 4c adjacent to the connecting portion 7a.

Note that the shapes and configurations of the above-described bearing unit 100, bearing portion 1, constant velocity joint 7, and various sealing devices 8 are not limited to the illustrated examples. For example, the shapes and configurations of the slinger 90, core bar 91, and magnetic encoder 94 that constitute the first seal member 9 are not limited to the illustrated example. For example, the slinger 90 may include an inward cylindrical portion bent toward the bearing space S from the radially outer end of the slinger collar 90c, and the thickness of the magnetic encoder 94 is not limited to the illustrated example. Furthermore, the manner in which the seal lip 92 is formed and the manner in which it contacts are not limited to those illustrated. Furthermore, the configurations of the seal portion 93, the protrusion 93a, and the elastic material 95 are not limited to the illustrated examples, and the configurations of FIGS. 4(a) and 4(b) are replaced with those shown in FIGS. Needless to say, it can be applied to Further, an elastic material such as a sealant may be interposed between the seal portion 93 and the metal core flange portion 101a not only in the example of FIG. 2 but also in the examples of FIGS. 3(a) to 4(b). The shapes and configurations of the second core metal 101 and the second seal lip 102 of the second seal member 10 are not limited to those shown in the drawings, and they may have different lengths and shapes of the lip body 102a as appropriate.

1 Bearing part 100 Bearing unit 2 Outer ring (outer member)
5 Inner ring (inner member)
7 Constant velocity joint 8 Sealing device 9 First seal member 90 Slinger 90a Slinger cylindrical portion 90b Connection portion 90c Slinger collar portion 91 Core metal 92 Seal lip 93 Seal portion 94 Magnetic encoder 95 Elastic material 10 Second seal member 101 Second core metal 101a Core metal flange portion 101b Core metal cylindrical portion 101c Bent portion 102 Second seal lip L Shaft S Bearing space

Claims (6)

In a bearing unit formed by combining a bearing portion including an outer member and an inner member that rotate relatively coaxially, and a constant velocity joint connected to the bearing portion, a space between the outer member and the inner member is sealed. A sealing device configured by combining a first seal member and a second seal member provided at a connection portion between the bearing portion and the constant velocity joint to seal the connection portion,
The first seal member includes a slinger attached to the inner member, a core bar attached to the outer member, and a seal lip made of an elastic body that is fixed to the core bar and comes into elastic contact with the slinger,
The slinger includes a slinger cylindrical portion that is fitted into the inner member, and a connecting portion that extends in one radial direction from an axially outer end of the slinger cylindrical portion along an axially outer end surface of the inner member. , a slinger collar portion formed by being folded back from the end of the connecting portion and extending in the other radial direction;
The second seal member includes a second core metal and a second seal lip made of an elastic body that is fixed to the second core metal and comes into elastic contact with the peripheral surface of the constant velocity joint,
The second core bar extends from a cylindrical core part provided on the inner diameter side of the connecting part and an axially inner end of the cylindrical core part, and extends between the connector part and the end surface of the inner member. a core metal flange portion that is sandwiched and fixed by the core metal cylindrical portion, and a bent portion that is bent radially inward from an axially outer end of the core metal cylindrical portion,
A sealing device characterized in that a sealing part made of an elastic body is interposed between the connecting part and the core metal collar part. In claim 1,
An annular magnetic encoder made of magnetic rubber with alternately magnetized north and south poles is provided on the outer surface of the slinger collar,
The sealing device is characterized in that the sealing portion is made of magnetic rubber that extends from an end portion on the inner diameter side of the magnetic encoder, wraps around and is fixed between the connecting portion and the metal core flange portion. In claim 1 or claim 2,
A sealing device characterized in that the seal portion is provided with a protrusion that comes into elastic contact with the metal core flange. In any one of claims 1 to 3,
A sealing device characterized in that an elastic material is interposed between the seal portion and the metal core flange portion. In any one of claims 1 to 4,
A sealing device characterized in that an elastic material is interposed between the core metal flange and the end surface of the inner member. In any one of claims 1 to 5,
The inner member has a stepped portion formed at a corner of an outer circumferential surface on an axially outer side,
The sealing device is characterized in that the second core metal is press-fitted to a position where the core metal cylindrical part is fitted into the step part and the core metal flange part abuts against the end surface of the inner member.

Images