JP7437753B2 - bearing device - Google Patents

Description

The present invention relates to a bearing device that includes an outer member and an inner member that rotate relatively coaxially, and a seal portion that seals between the outer member and the inner member.

Conventionally, as shown in Patent Document 1 and Patent Document 2 below, one axial end of a hub ring constituting an inner member is bent radially outward and crimped by rotating a crimping jig while swinging. A bearing device is known in which a hub ring and an inner ring member are machined and integrally fixed.

Japanese Patent Application Publication No. 2004-68890 JP 2019-100505 Publication

However, in such a configuration, even if the hub ring and the inner ring member can be integrally fixed by crimping, the fitting portion of the slinger member and the inner member that are fitted to the inner member may not be able to penetrate inside the bearing. It may become an infiltration route for muddy salt water, etc.

The present invention has been made in view of the above-mentioned circumstances, and an object of the present invention is to provide a bearing device that can prevent muddy salt water and the like from entering from the fitting portion of the slinger member fitted to the inner member.

In order to achieve the above object, a bearing device of the present invention includes an outer member and an inner member that rotate relatively coaxially, the inner member comprising a hub wheel and one axial end of the hub wheel. the hub ring has a flange-shaped caulked part formed extending radially outward from the one axial end, A slinger member having a cylindrical fitting portion fitted to the outer circumferential surface of the inner ring member and a disk portion extending radially outward from one axial end of the cylindrical fitting portion is fitted to the outer circumferential surface. and the caulking portion integrally fixes the inner ring member to the hub wheel while being in elastic contact with a seal portion made of an elastic material that seals between the inner ring member and the cylindrical fitting portion. The seal portion is provided in close contact with the inner ring member and the slinger member .
According to the above configuration, the caulking part is provided so as to integrally fix the inner ring member to the hub ring while being in elastic contact with the seal part made of an elastic material that seals between the inner ring member and the slinger member. There is. Therefore, the sealing performance of the fitting portion between the inner ring member and the slinger member is improved, and it is possible to prevent muddy salt water and the like from entering the inside of the bearing device.

Since the bearing device of the present invention has the above-described configuration, it is possible to prevent muddy salt water and the like from entering through the fitting portion with the slinger member fitted to the inner member.

1 is a schematic vertical cross-sectional view showing an example of a bearing device according to an embodiment of the present invention. 1 is a partially enlarged cross-sectional view of the X section in FIG. It is a schematic sectional view shown typically for explanation. 1 is a partially enlarged cross-sectional view of the X section in FIG. It is a schematic sectional view shown typically for explanation. 1 is a partially enlarged cross-sectional view of the X section in FIG. It is a schematic sectional view shown typically for explanation.

Embodiments of the present invention will be described below based on the drawings. Note that some of the detailed symbols attached to other figures are omitted from some of the figures.
The bearing device 1 according to this embodiment includes an outer member 2 and an inner member 5 that rotate relatively coaxially. The inner member 5 is composed of a hub ring 3 and an inner ring member 4 that is fitted on the axially one end 3c side of the hub ring 3. The hub ring 3 has a flange-shaped caulking portion 34 extending radially outward from one axial end portion 3c. The outer circumferential surface 4b of the inner ring member 4 includes a cylindrical fitting portion 101 that is fitted to the outer circumferential surface 4b of the inner ring member 4, and a disk portion that extends radially outward from one axial end portion 101a of the cylindrical fitting portion 101. A slinger member 10 having 102 is fitted. The caulking part 34 is provided so as to integrally fix the inner ring member 4 to the hub ring 3 while being in elastic contact with the seal part 13 made of an elastic material that seals between the inner ring member 4 and the cylindrical fitting part 101. It is being
This will be explained in detail below.

<First embodiment>
First, a first embodiment will be described with reference to FIGS. 1 and 2.
The bearing device 1 shown in FIG. 1 supports the wheels (not shown) of an automobile so that they can rotate around an axis L (shaft rotation). This bearing device 1 is a hub bearing, and roughly includes an outer ring (outer member) 2, a hub ring 3, an inner ring member 4 that is fitted and integrated with the vehicle body side of the hub ring 3, and an outer ring 2. It is configured to include two rows of rolling elements (balls) 6 interposed between the hub ring 3 and the inner ring member 4. In this example, the hub ring 3 and the inner ring member 4 constitute an inner ring (inner member) 5. The outer ring 2 is fixed to a vehicle body (not shown) of an automobile. The inner ring 5 is rotatable (axially rotated) about an axis L with respect to the outer ring 2, and a bearing space (annular space) S is formed between the outer ring 2 and the inner ring 5. 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). The hub ring 3 has a flange-shaped caulking portion 34 formed to extend outward in the radial direction from one axial end portion (vehicle body side end portion) 3c. The caulking portion 34 is formed by caulking using a caulking jig 7 shown by a two-dot chain line in FIG. The caulking jig 7 has a main body portion 70 formed in a cylindrical shape, and an inclined portion 71 is formed from one end surface 70a of the main body portion 70. The diameter of the inclined portion 71 is smaller than the diameter of the main body portion 70. An end portion 72 projecting in a cylindrical shape from the tip of the inclined portion 71 is formed in a size that can be inserted into the shaft hole 35 of the hub wheel 3. After installing the sealing device 8, which will be described later, on the inner ring member 4, apply the crimping jig 7 to the hub wheel 3 from the vehicle body side, and swing the crimping jig 7 at an angle α as shown in FIG. By rotating the hub wheel 3 around the axis L, the end portion of the hub ring 3 before the crimping portion 34 is formed is aligned with the end surface 70a of the main body portion 70 along the inclined surface of the inclined portion 71 of the crimping jig 7. It is guided and bent radially outward. At this time, a seal portion 13 made of an elastic material (see FIG. 2(a)) is interposed between the inner ring member 4 and the cylindrical fitting portion 101, and the caulking portion 34 is in elastic contact with the seal portion 13. The inner ring member 4 is integrally fixed to the hub ring 3 in this state. Sealing devices 8 and 9 (bearing seals) are provided at both ends of the bearing space S along the axis L direction, between the outer ring 2 and the hub ring 3, and between the outer ring 2 and the inner ring member 4. It is mounted, and both ends of the bearing space S along the axis L direction are sealed. This prevents muddy salt water and the like from entering the bearing space S and preventing lubricant (grease, etc.) filled in the bearing space S from leaking to the outside.
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.

FIG. 2(a) is a partially enlarged sectional view of the X section in FIG. 1, showing the sealing device 8 mounted on the vehicle body side. The sealing device 8 includes a slinger member 10, a core member 11, and a seal lip portion 12 that is fixed to the core member 11 and elastically slides against the slinger member 10.

The slinger member 10 is formed by pressing a steel plate such as SPCC or SUS, and has a cylindrical shape with a substantially L-shaped cross section on one side. The slinger member 10 includes a cylindrical fitting portion 101 that is fitted (externally fitted) to the outer circumferential surface 4b of the inner ring member 4, and a radially outward direction from one axial end portion (vehicle body side end portion) 101a of the cylindrical fitting portion 101. It has a disk portion 102 extending to . A seal portion 13 is provided on the outer surface 102b of the disc portion 102 of the slinger member 10. The seal portion 13 is a toric body with a rectangular cross-sectional shape, is made of an elastic material such as a rubber material, and is integrally fixed to the radially inner side of the outer surface 102b of the disk portion 102 by vulcanization molding.

The core member 11 is formed by pressing a steel plate such as SPCC or SUS, and has a cylindrical shape with a substantially L-shaped cross section on one side. The core member 11 includes a cylindrical fitting part 111 that is fitted (internally fitted) into the inner circumferential surface 2b of the outer ring 2, and a radial direction from the other axial end (wheel side end) 111a of the cylindrical fitting part 111. It has a disk portion 112 extending inward.

The seal lip portion 12 is made of an elastic material such as a rubber material, and is integrally fixed to the core member 11 via the seal lip base 120 by vulcanization molding. The seal lip base 120 extends from a part of the axially inner surface 112a of the disk portion 112 of the core member 11, wraps around the radially inner end 112b, and extends over the entire surface of the axially outer surface 112c of the disk portion 112. cover. Further, the seal lip base 120 covers the entire radial inner peripheral surface 111b of the cylindrical fitting part 111, goes around one axial end (end on the vehicle body side) 111c of the cylindrical fitting part 111, and extends around the cylindrical fitting part 111. It reaches the outer peripheral surface 111d in the radial direction and is fixedly integrated with the core member 11. An annular protrusion 124 that protrudes outward in the radial direction is formed in the seal lip portion 12 at a portion reaching the outer circumferential surface 111d of the cylindrical fitting portion 111 of the core member 11. When the core member 11 is fitted into the outer ring 2, this annular protrusion 124 is interposed in a compressed state between the inner circumferential surface 2b of the outer ring 2 on the vehicle body side and the outer circumferential surface 111d of the cylindrical fitting part 111. It is formed like this. In FIG. 2(a), the two-dot chain line of the annular protrusion 124 indicates the original shape before compression.

A plurality of seal lips 121 , 122 , 123 are formed extending from the seal lip base 120 . The seal lip 121 is a seal lip located furthest in the radial direction and closest to the outer space. The seal lip 123 is a seal lip located at the innermost position in the radial direction and closest to the bearing space S. Seal lip 122 is a seal lip located between seal lip 121 and seal lip 123. Of these, the seal lips 121 and 122 are formed to gradually expand in diameter and extend toward the outside in the axial direction, and are axial lips (side lip). The seal lip 123 is a radial lip that is formed to extend radially inward and comes into sliding contact with the inner circumferential surface 101b of the cylindrical fitting portion 101 of the slinger member 10.

The caulking portion 34 of the hub ring 3 in this embodiment is formed so as to extend so as to have a portion that overlaps with the disc portion 102 of the slinger member 10 in the axial direction, and is formed so as to extend beyond the outer circumferential surface 4b of the inner ring member 4. It has a protruding portion 34b. Between the axially inner surface 34a of the caulking portion 34 of the hub wheel 3 and the axially outer surface 102b of the disc portion 102 of the slinger member 10, a seal portion 13 made of elastic rubber, which is an elastic material, is provided. is provided so that it comes into elastic contact. Further, the seal portion 13 is provided so as to come into elastic contact with the outer circumferential surface 4b of the inner ring member 4. In this way, the seal portion 13 is provided with an interference margin at a portion surrounded by the inner surface 34a of the protruding portion 34b, the outer surface 102b of the disc portion 102, and the outer peripheral surface 4b of the inner ring member 4. . In FIG. 2(a), the original shape of the seal portion 13 before deformation is shown by a two-dot chain line. The seal portion 13 is elastically deformed by being sandwiched between the protruding portion 34b of the caulking portion 34, the disk portion 102 of the slinger member 10, and the outer circumferential surface 4b of the inner ring member 4, and the inner surface 34a of the caulking portion 34 The outer surface 102b of the disc portion 102 and the outer circumferential surface 4b of the inner ring member 4 are in close contact with each other.

According to the present embodiment, the caulking portion 34 integrally fixes the inner ring member 4 to the hub ring 3 while being in elastic contact with the seal portion 13 that seals between the inner ring member 4 and the slinger member 10. Since it is provided, the sealing performance between the outer circumferential surface 4b of the inner ring member 4, which is the fitting part between the inner ring member 4 and the slinger member 10, and the outer circumferential surface 101c of the cylindrical fitting part 101 of the slinger member 10 is improved, It is possible to prevent muddy salt water and the like from entering the inside of the bearing device 1, that is, the bearing space S. Therefore, it is possible to meet the required performance even in tests under severe conditions, such as corrosion tests under negative pressure environments. Further, the seal portion 13 can also seal between the inner surface 34a of the caulking portion 34 and the outer surface 4c of the inner ring member 4. Furthermore, since the protruding portion 34b of the caulking portion 34 overlaps the disc portion 102 of the slinger member 10 in the axial direction, the fitting portion between the inner ring member 4 and the slinger member 10 is covered with the caulking portion 34. The intrusion of mud, salt water, etc. can be blocked even more effectively.

Next, a bearing device 1' shown in FIG. 2(b), which is a modification of the first embodiment, will be described. Note that parts common to the bearing device 1 of the first embodiment described above are given the same reference numerals, and differences will be mainly explained.
A bearing device 1′ shown in FIG. 2(b) differs from the bearing device 1 of the first embodiment in the configuration of a seal portion 13. In this modification, the seal portion 13 is not in contact with the outer circumferential surface 4b of the inner ring member 4, as shown in FIG. 2(b), and is not in elastic contact with the outer circumferential surface 4b. It is provided between the side surface 34a and the outer surface 102b of the disk portion 102 of the slinger member 10 so as to be in elastic contact with it. In this way, even if the seal portion 13 is not in elastic contact with the outer circumferential surface 4b, the same effects as in the above-described embodiment can be achieved.

<Second embodiment>
Next, with reference to FIG. 3, a bearing device 1A and a bearing device 1A' according to a second embodiment will be described. Note that parts common to the bearing device 1 of the first embodiment described above are given the same reference numerals, and differences will be mainly explained.
First, FIG. 3(a) shows a bearing device 1A according to a second embodiment. The caulking portion 34 in the bearing device 1A is not formed so as to extend so as to have a portion that overlaps with the disk portion 102 of the slinger member 10 in the axial direction, but rather has a protrusion that protrudes beyond the outer circumferential surface 4b of the inner ring member 4. It does not have the portion 34b. Further, the bearing device 1A differs from the first embodiment in that a magnetic encoder 14 for rotation detection is fixedly and integrally provided on the outer surface 102b of the disk portion 102 of the slinger member 10 by vulcanization molding. Furthermore, the seal portion 13 of the bearing device 1A is separately provided on the radially inner side of the magnetic encoder 14 made of magnetic rubber and fixed to the disk portion 102.

The magnetic encoder 14 is made of magnetic rubber containing magnetic powder, and is magnetized with a large number of N poles and S poles alternately and at equal intervals in the circumferential direction. Therefore, a magnetic sensor (not shown) is installed on the vehicle body (not shown) so as to face the magnetized surface 14a of the magnetic encoder 14, and this magnetic sensor and the magnetic encoder 14 constitute a wheel rotation detection mechanism. Ru.

The seal part 13 is separately provided inside the magnetic encoder 14 in the radial direction, and has a cross-sectional shape of a rectangular torus extending in the radial direction, with an outer end 13b serving as an upper end of the seal part 13. A part of the side is integrally fixed to the axially outer surface 102b of the disk portion 102 of the slinger member 10. The protruding part 13c of the seal part 13 which protrudes below the cylindrical fitting part 101 of the slinger member 10 is brought into elastic contact with the inner surface 34a of the caulking part 34 and the outer surface 4c of the inner ring member 4. Ru. Further, in the seal portion 13, a slight gap is formed between the inner circumferential surface 13a and the outer circumferential surface 3b of the hub ring 3, and between the inner end portion 14b of the magnetic encoder 14 and the outer end portion 13b of the seal portion 13. It is set up in the same condition. As described above, the caulking portion 34 has a length that does not overlap the slinger member 10 in the axial direction, extends radially outward from one axial end 3c of the hub wheel 3, and comes into elastic contact with the seal portion 13. It is provided so that the inner ring member 4 is integrally fixed to the hub ring 3 in this state. The axially outer surface 4c of the inner ring member 4 is located axially more inwardly than the axially outer surface 102b of the disk portion 102 of the slinger member 10, and is thus formed. A seal portion 13 is arranged between the outer surface 4c and the inner surface 34a.

According to the present embodiment, the caulking part 34 integrally attaches the inner ring member 4 to the hub ring 3 while being in elastic contact with the seal part 13 made of an elastic material that seals between the inner ring member 4 and the slinger member 10. The seal portion 13 is provided so as to close the space between the outer circumferential surface 4b, which is the fitting portion between the inner ring member 4 and the slinger member 10, and the outer circumferential surface 101c of the cylindrical fitting portion 101. Therefore, even without the protruding portion 34b, the fitting portion can be sealed, and muddy salt water or the like can be prevented from entering the inside of the bearing device 1A. Also in this embodiment, the seal portion 13 can also seal between the outer circumferential surface 3b of the hub ring 3 and the outer surface 4c of the inner ring member 4. Furthermore, since the seal portion 13 is separately provided on the radially inner side of the magnetic encoder 14, the seal portion 13 can seal a position close to the fitting portion between the inner ring member 4 and the slinger member 10, thereby improving sealing performance. can. Further, by providing it separately from the magnetic encoder 14, the degree of freedom in designing the seal portion 13 can be increased.

Next, a bearing device 1A' shown in FIG. 3(b), which is a modification of the bearing device 1A of the second embodiment, will be described. Note that parts common to those of the bearing devices 1 to 1A described above are given the same reference numerals, and differences will mainly be explained.
The bearing device 1A' shown in FIG. 3(b) differs from the bearing device 1A in the configuration of the caulking portion 34 and the seal portion 13. In this modification, the caulking part 34 is formed to extend outward in the radial direction so as to overlap the disc part 102 of the slinger member 10 and the magnetic encoder 14 in the axial direction, and has a protruding part 34b. The caulking portion 34 is caulked so that the inner surface 34a contacts the axially outer surface 4c of the inner ring member 4 and a part of the magnetized surface 14a of the magnetic encoder 14, as shown in the figure. The seal portion 13 is formed into a circular annular body in a cross-sectional view, and the seal portion 13 is connected to an outer surface 102b in the axial direction of the disk portion 102 of the slinger member 10, an inner end portion 14b of the magnetic encoder 14, It is surrounded by the outer circumferential surface 4b of the inner ring member 4 and is provided in elastic contact with each of them.

In this modification, the magnetic encoder 14 is interposed between the disk portion 102, which serves as an inlet for muddy salt water, etc., and the caulking portion 34, and the seal portion 13 is further provided on the inner diameter side. It is possible to more effectively block the infiltration of muddy salt water, etc., and improve the sealing performance of the fitting part between the inner ring member 4 and the slinger member 10 and the crimping part of the outer surface 4c and the crimping part 34. can.

<Third embodiment>
Next, a bearing device 1B according to a third embodiment shown in FIG. 4(a) and a bearing device 1B′ shown in FIG. 4(b) which is a modification thereof will be described. Note that parts common to those of the bearing devices 1 to 1A' described above are given the same reference numerals, and differences will mainly be explained.
FIG. 4(a) shows a bearing device 1B according to a third embodiment. This embodiment differs from the above embodiment in that the seal portion 13 in the bearing device 1B is constituted by a magnetic encoder 14 made of magnetic rubber fixed to the disc portion 102. Further, the inner ring member 4 of the bearing device 1B has an upper corner cut out to form a recess 4d. The magnetic encoder 14 is fixedly integrated with the slinger member 10, and the inner end 14b of the magnetic encoder 14 is in a state where a gap is provided with the outer circumferential surface 4da of the recess 4d, and the slinger member 10 is cylindrically fitted. It is located within the recess 4d of the inner ring member 4 below the portion 101. That is, since the magnetic encoder 14 in this embodiment also has the function of the seal portion 13, the inner surface 34a of the caulking portion 34, the axial outer surface 4db of the recess 4d of the inner ring member 4, and the slinger It is formed to extend so as to come into elastic contact with the outer surface 102b of the disk portion 102 of the member 10. Further, the caulking portion 34 is formed to extend outward in the radial direction so as to overlap the disk portion 102 of the slinger member 10 and the magnetic encoder 14 in the axial direction, and has a protruding portion 34b.

According to this embodiment, the radially inner portion of the magnetic encoder 14, specifically, the portion that overlaps the caulking portion 34 in the axial direction functions as the seal portion 13, and the seal portion 13 is connected to the inner ring member 4 and the slinger member. 10, and the outer circumferential surface 101c of the cylindrical fitting part 101 is provided so as to close the space between the outer circumferential surface 4b and the outer circumferential surface 101c of the cylindrical fitting part 101. This improves the sealing performance of the fitting part and prevents leakage into the inside of the bearing device 1B. It can prevent the infiltration of muddy salt water, etc. Further, according to the present embodiment, the seal portion 13 can also seal between the outer surface 4 c of the inner ring member 4 and the inner surface 34 a of the caulked portion 34 . Further, since the seal portion 13 is constituted by a magnetic encoder 14 made of magnetic rubber fixed to the slinger member 10, there is no need to separately assemble the seal portion 13.

Next, a bearing device 1B' shown in FIG. 3(b), which is a modification of the bearing device 1B of the third embodiment, will be described. Note that parts common to those of the bearing devices 1 to 1B described above are given the same reference numerals, and differences will mainly be explained.
A bearing device 1B′ shown in FIG. 4B differs from the bearing device 1B in that the caulking portion 34 has a length that does not overlap the slinger member 10 in the axial direction. The magnetic encoder 14, which also serves as the seal portion 13, is formed to extend inward in the radial direction from the cylindrical fitting portion 101 of the slinger member 10. It is provided so as to be inclined outwardly and come into elastic contact with the inner surface 34a. Further, in this modification, the axially outer surface 4c of the inner ring member 4 is located at approximately the same position in the axial direction as the axially outer surface 102b of the disk portion 102 of the slinger member 10. Note that the recess 4d provided in the inner ring member 4 of FIG. 4(a) is not formed in the inner ring member 4 of FIG. 4(b).

In this modification, the magnetic encoder 14 is interposed between the disk portion 102, which serves as an inlet for muddy salt water, etc., and the caulking portion 34, and the inner end portion 14b, which functions as the seal portion 13, is attached to the inner surface 34a. Since it is provided in such a way that it makes firm elastic contact with the body, it is possible to more effectively block the infiltration of muddy salt water, etc., and the fitting part between the inner ring member 4 and the slinger member 10 and the crimping of the outer surface 4c and the crimping part 34 can be prevented. It is possible to improve the sealing performance to the site.

The bearing devices 1, 1', 1A, 1A', 1B, and 1B' according to the present embodiment may be constructed by combining features of each of the above-described embodiments and modifications. For example, in the case of the inner ring member 4 having a recess 4d shown in FIG. 4(a), a seal portion 13 as shown in FIG. 2(a) may be provided in the recess 4d. Further, the bearing device is not limited to that described above or shown in the drawings. For example, the slinger member 10 and the core member 11 may be formed of a hard resin material instead of a steel plate such as SPCC or SUS. Further, the configuration and shape of the seal lip portion 12 are not limited to the illustrated example, and are not limited to the above-mentioned rectangular or circular shape, and various shapes such as a chevron-shaped cross section can be adopted. Further, the configuration of the caulking portion 34 is not limited to that described above, and may be designed as appropriate. Here, the assembly procedure of the bearing devices 1, 1', 1A, 1A', 1B, 1B' according to the present embodiment is a general assembly procedure in which a sealing device is installed after caulking the caulking part. Unlike the above, the crimping process is performed with the sealing device 8 attached to the inner ring member 4 in advance. Thereby, the inner ring member 4 can be integrally fixed to the hub ring 3 with the caulking part 34 in elastic contact with the seal part 13. Furthermore, in each of the embodiments described above, the bearing devices 1, 1', 1A, 1A', 1B, 1B' are mounted on an automobile, but the bearing devices 1, 1', 1A, 1A', 1B, 1B' ' may be attached to other mechanical devices. Furthermore, although a so-called pack seal type sealing device having a slinger member 10, a core member 11, and a seal lip portion 12 is shown as the sealing device 8 here, the sealing device is not limited to this, and only the slinger member 10 or It is also applicable to an example in which the slinger member 10 and the magnetic encoder 14 are arranged.

1, 1', 1A, 1A', 1B, 1B' Bearing device 2 Outer member (outer ring)
3 Hub ring 3c One end in the axial direction 30 Hub ring body 34 Caulking part 4 Inner ring member 5 Inner member (inner ring)
8, 9 Sealing device 10 Slinger member 101 Cylindrical fitting portion 101a One axial end portion 102 Disk portion 12 Seal lip portion 13 Seal portion 14 Magnetic encoder

Claims (5)

A bearing device comprising an outer member and an inner member that rotate relatively coaxially,
The inner member includes a hub ring and an inner ring member that is fitted to one end of the hub ring in the axial direction,
The hub ring has a flange-shaped caulking part formed to extend radially outward from the one axial end,
The outer circumferential surface of the inner ring member has a cylindrical fitting part that is fitted to the outer circumferential surface of the inner ring member, and a disk part that extends radially outward from one axial end of the cylindrical fitting part. A slinger member is fitted,
The caulking portion is provided to integrally fix the inner ring member to the hub ring while being in elastic contact with a seal portion made of an elastic material that seals between the inner ring member and the cylindrical fitting portion. and
The bearing device , wherein the seal portion is provided in close contact with the inner ring member and the slinger member . In claim 1,
The caulking portion is formed to extend so as to overlap the disk portion in the axial direction,
The bearing device, wherein the seal portion is provided between the disc portion and the caulking portion. In claim 1 or claim 2,
The bearing device according to claim 1, wherein the seal portion includes a magnetic encoder made of magnetic rubber fixed to the disk portion. In claim 1 or claim 2,
The bearing device is characterized in that the seal portion is separately provided on the radially inner side of a magnetic encoder made of magnetic rubber fixed to the disc portion. In any one of claims 1 to 4,
The slinger member is characterized in that a seal lip portion that seals between the outer member and the inner member slides into contact with each other, and constitutes a part of a sealing device provided between the outer member and the inner member. Device.

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