JP2016014446A - Bearing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bearing device for achieving excellent interference stability, good sealability of a bearing internal space, and good travelling stability by suppressing the deformation of a slinger thereof.SOLUTION: A sealing member 50 includes a slinger 51 whose cross section including a shaft 130 is L-shaped along a first connection surface 100Aa and a second connection surface 100Ba, and which is provided in contact with at least the second connection surface 100Ba, a first rubber member 52 mounted on the slinger 51, and a second rubber member 55 having a first lip part 55a contacting a first outer peripheral face 100A. Between a protrusion end 52c protruding from a first connection part 100C of the first rubber member 52 to an outer ring 20 and a third connection surface 20Aa, a labyrinth gap is formed.

Description

  The present invention relates to a bearing device that supports wheels of an automobile or the like. Specifically, the present invention relates to a structure of a sealing member that seals between an inner ring member and an outer ring.

  A wheel of an automobile or the like is generally supported by a wheel bearing device. FIG. 5 shows an example of a wheel bearing device 1001 generally used conventionally. The wheel bearing device 1001 includes an inner ring member 1100, an outer ring 1020, a plurality of rolling elements 1030, and a cage 1040. The inner ring member 1100 includes a hub shaft 1110 and an inner ring 1120. On the outer peripheral surface of the inner ring member 1100 and the inner peripheral surface of the outer ring 1020, raceway surfaces 1031 and 1032 on which the rolling elements 1030 roll are formed, and the raceway surfaces 1031 and 1032 are positioned so as to face each other. The plurality of rolling elements 1030 are arranged in a space A surrounded by the raceway surfaces 1031 and 1032 of the inner ring member 1100 and the outer ring 1020. The plurality of rolling elements 1030 are held by a cage 1040. One end of the hub shaft 1110 (left side in FIG. 5) has a flange-shaped attachment portion 1111 extending outward in the radial direction. The attachment portion 1111 is attached to the wheel with a bolt or the like.

The wheel bearing device 1001 is normally used in an environment exposed to dust, rainwater, or the like. Therefore, it is necessary to take measures to prevent dust, rainwater, and the like from entering the inside of the wheel bearing device 1001 (the space A in which the rolling elements 1030 are arranged, which are configured between the inner ring member 1100 and the outer ring 1020). . In particular, in a cold region, an antifreezing agent such as calcium chloride (CaCl ₂ ) may be sprayed on the road surface. In this case, the water splashed from the road surface when the vehicle travels contains the salt content of the anti-freezing agent. Therefore, when this water enters the inside of the wheel bearing device 1001, rust is generated inside the wheel bearing device 1001. Cause. Therefore, in such an environment, in particular, a measure for preventing water and the like from entering the inside of the wheel bearing device 1001 is required.

  As a countermeasure against this, the wheel bearing device 1001 is provided with a sealing member 1050 that seals a gap between the hub shaft 1110 and the outer ring 1020. For example, a configuration in which a slinger made of SUS is provided as the sealing member 1050 is known (for example, Patent Document 1). Hereinafter, the configuration of the sealing member 1050 will be described.

  FIG. 6 is an enlarged view of a part of FIG. In the gap between the hub shaft 1110 and the outer ring 1020, as the sealing member 1050, an annular first sealing member (slinger 1051) and an annular second sealing member (core metal 1052 and rubber member 1053) are also provided. Is provided.

  The slinger 1051 is made of a metal such as SUS, for example. The slinger 1051 has a curved shape along a curved surface 1110A from the inner ring raceway surface 1031 to the mounting portion 1111 in the outer peripheral surface of the hub shaft 1110 in the gap between the hub shaft 1110 and the outer ring 1020. In addition, the slinger 1051 is not provided on the surface 1110B of the hub shaft 1110 that faces the mounting portion 1111 from the gap between the hub shaft 1110 and the outer ring 1020. The slinger 1051 has a shape having a bent portion 1051a that is bent in the axial direction toward the outer ring 1020.

  The metal core 1052 and the rubber member 1053 are fixed to the outer peripheral surface of the outer ring 1020 in a state where both are fixed integrally. Specifically, the metal core 1052 and the rubber member 1053 are fitted to the outer ring 1020 so as to contact the outer peripheral surface of the outer ring 1020 and the surface parallel to the radial direction facing the gap among the outer ring 1020. An axial lip 1053a that is in contact with a surface parallel to the radial direction of the slinger 1051 and a radial lip 1053b that is in contact with a surface parallel to the axial direction of the slinger 1051 are formed at the tip portion of the rubber member 1053 that extends in the direction of the hub shaft 1110. Is provided.

Special table 2013-534301 gazette

  By the way, as shown in FIG. 6, when the slinger 1051 has a curved shape, the slinger 1051 may be deformed in a direction to release the curved state. In other words, the slinger 1051 may be deformed so as to expand outward in the radial direction. If the slinger 1051 is deformed, the distance between the core bar 1052 and the slinger 1051 may change, which affects the stability of the interference margin of the axial lip 1053a and the radial lip 1053b. Since the crimping margin is not stable, the contact state between the axial lip 1053a or radial lip 1053b and the slinger 1051 becomes unstable. As a result, during operation of the bearing device, rotational torque due to friction generated between the axial lip 1053a or radial lip 1053b and the slinger 1051 may become unstable. Furthermore, since the fastening margin is not stable, the contact state between the axial lip 1053a or radial lip 1053b and the slinger 1051 becomes unstable, which may cause the sealing performance of the space A inside the bearing to become unstable.

  An object of the present invention is to obtain excellent sealability stability by suppressing the deformation of the slinger, and to obtain good sealing performance and good running stability of the bearing internal space.

  In a bearing device according to an embodiment of the present invention that solves the above problems, an inner ring member having a first raceway surface formed on an outer peripheral surface, and a second raceway surface that faces the first raceway surface is formed on an inner peripheral surface. An outer ring, a plurality of rolling elements that roll in a space formed between the first raceway surface and the second raceway surface, a cage that holds the plurality of rolling elements, the inner ring member, and the outer ring And a sealing member that seals a gap formed therebetween.

  The inner ring member includes an annular first outer peripheral surface on which the first raceway surface is formed, and an annular second outer peripheral surface continuous with the first outer peripheral surface. The first outer peripheral surface is an annular region including a first connection portion to which the first outer peripheral surface and the second outer peripheral surface are connected, and is substantially parallel to the radial direction and is more than the first connection portion. It has a first connecting surface radially inward. The second outer peripheral surface is an annular region including the first connection portion, and has a second connection surface substantially parallel to the axial direction.

  The outer ring includes an annular third outer peripheral surface positioned so as to be aligned in the axial direction with a space from the second outer peripheral surface, and an annular fourth outer peripheral surface that is continuous with the third outer peripheral surface. Including. The third outer peripheral surface is an annular region including a second connection portion to which the third outer peripheral surface and the fourth outer peripheral surface are connected, and is a third connection axially inward from the second connection portion. Has a surface. The fourth outer peripheral surface is an annular region including the second connection portion, and the size of the angle formed with the axis is smaller than the size of the angle formed with the third connection surface and the axis. A fourth connection surface is provided.

  The sealing member has an annular first shape whose cross section in the radial direction is L-shaped along the first connection surface and the second connection surface, and is provided in contact with at least the second connection surface. The sealing member is attached to a portion along the second outer peripheral surface of the first sealing member, and protrudes from the first connection portion toward the outer ring, and the protruding end and the third connection surface A labyrinth gap is formed between them, or the protruding end and the third connection surface are in contact with each other, and the annular second sealing member is attached to the inner peripheral surface of the outer ring. And an annular third sealing member having a first contact portion in contact with the outer peripheral surface.

  According to the present invention, the inner ring member includes a continuous first outer peripheral surface and a second outer peripheral surface, and the first connecting portion to which the first outer peripheral surface and the second outer peripheral surface are connected among the first outer peripheral surfaces. The annular region including the first connection surface is substantially parallel to the radial direction, and the annular region including the first connection portion of the second outer peripheral surface is the second connection surface substantially parallel to the axial direction. is there. Therefore, the 1st connection part which can fit a 1st sealing member will exist in the outer peripheral surface of an inner ring member.

  Since the 1st connection part which can fit a 1st sealing member in the outer peripheral surface of an inner ring member exists, a 1st sealing member follows the 1st connection surface and the 2nd connection surface along the 1st connection part. Can be provided in an annular shape. Therefore, the first sealing member can be designed to have a shape that is difficult to deform. Since the first sealing member is not easily deformed, the contact state between the third sealing member and the first contact portion is stabilized. That is, a stable interference can be obtained.

  Then, by obtaining a stable interference allowance, as a result, it is possible to realize good sealing performance and good running stability of the bearing internal space.

FIG. 1 is a cross-sectional view of the wheel bearing device according to the first embodiment. 2 is an enlarged cross-sectional view of the periphery of the sealing member in FIG. FIG. 3 is an enlarged cross-sectional view of the sealing member according to the second embodiment. FIG. 4 is an enlarged cross-sectional view of the sealing member according to the third embodiment. FIG. 5 is a cross-sectional view of a conventional wheel bearing device. 6 is an enlarged cross-sectional view of the periphery of the sealing member in FIG.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. For convenience of explanation, the drawings referred to in the following description show only the main members necessary for explaining the present invention in a simplified manner among the constituent members of the embodiment of the present invention. Therefore, the present invention can include arbitrary components not shown in the following drawings. In addition, the dimensions of the members in the following drawings do not faithfully represent actual dimensions, dimensional ratios of the members, or the like.

<Embodiment 1>
A wheel bearing device 1 according to Embodiment 1 of the present invention will be described with reference to FIGS. 1 and 2. FIG. 1 shows a wheel bearing device 1. FIG. 2 is an enlarged view of the vicinity of the sealing member 50 in FIG. The wheel bearing device 1 includes an inner ring member 100, an outer ring 20, a plurality of rolling elements 30, a cage 40, and a sealing member 50. The inner ring member 100 and the outer ring 20 are annular members having a shaft 130 as a central axis. As shown in FIG. 1, the wheel bearing device 1 has a flange formed outward in the axial direction, and is connected to a vehicle suspension through a member (not shown). The wheel bearing device 1 is covered with a lid member 21 in the axial direction.

  The inner ring member 100 includes a hub shaft 110 and an inner ring 120. The hub shaft 110 and the inner ring 120 are annular members having a shaft 130 as a central axis. As shown in FIG. 2, the outer peripheral surface of the inner ring member 100 includes a first outer peripheral surface 100A and a second outer peripheral surface 100B continuous to the first outer peripheral surface 100A. Each of the first outer peripheral surface 100A and the second outer peripheral surface 100B is an annular member having the shaft 130 as a central axis. The first outer peripheral surface 100A and the second outer peripheral surface 100B are adjacent to each other through the first connection portion 100C. The first connecting portion 100C is represented as a point connecting the first outer peripheral surface 100A and the second outer peripheral surface 100B in the cross-sectional view of FIG. The first connection portion 100C is an annular region having the shaft 130 as a central axis.

  As shown in FIG. 1, two first raceway surfaces 31 on which the rolling elements 30 roll are formed on the first outer peripheral surface 100A. One of the first raceway surfaces 31 is formed on the outer peripheral surface of the hub axle 110 and the other is formed on the outer peripheral surface of the inner ring 120. The first connection surface 100Aa is a region including the first connection portion 100C in the first outer peripheral surface 100A, and exists radially inward from the first connection portion 100C. The first connection surface 100Aa is a surface parallel to the radial direction, that is, a surface perpendicular to the axial direction. Each of the first track surface 31 and the first connection surface 100Aa is an annular region having the shaft 130 as a central axis.

  The second outer peripheral surface 100 </ b> B is an outer peripheral surface of the hub shaft 110 in the inner ring member 100. The distance between the second outer peripheral surface 100B and the shaft 130 is greater than the distance between the first raceway surface 31 formed on the first outer peripheral surface 100A and the shaft 130. The second connection surface 100Ba is a region including the first connection portion 100C in the second outer peripheral surface 100B. The second connection surface 100Ba is a surface parallel to the axial direction. Accordingly, the first connection surface 100Aa of the first outer peripheral surface 100A and the second connection surface 100Ba of the second outer peripheral surface 100B are connected at substantially right angles in the first connection portion 100C. The second connection surface 100Ba is an annular region having the shaft 130 as a central axis.

  As shown in FIG. 1, the hub shaft 110 has an attachment portion 111 for attaching the wheel bearing device 1 to a wheel. The attachment portion 111 is an annular member having the shaft 130 as a central axis. The attachment portion 111 has a flange shape extending outward in the radial direction. The attachment portion 111 is provided continuously to the second outer peripheral surface 100B on the opposite side of the second outer peripheral surface 110B from the first connection portion 100C. The attachment portion 111 is fixed to the wheel using a bolt or the like. In addition, the attaching part 111 does not need to be a flange-shaped member provided continuously in the circumferential direction, and may be configured by, for example, a plurality of members provided at intervals in the circumferential direction.

  The outer ring 20 is provided so as to cover a part of the first outer peripheral surface 100 </ b> A of the inner ring member 100. As shown in FIG. 1, two second raceway surfaces 32 on which the rolling elements 30 roll are formed on the inner peripheral surface of the outer ring 20. Each of the second track surfaces 32 is positioned so as to face each of the first track surfaces 31. The second raceway surface 32 is an annular region having the shaft 130 as a central axis. The outer peripheral surface of the outer ring 20 includes a third outer peripheral surface 20A and a fourth outer peripheral surface 20B continuous with the third outer peripheral surface 20A. Each of the third outer peripheral surface 20A and the fourth outer peripheral surface 20B is an annular member having the shaft 130 as a central axis. The third outer peripheral surface 20A and the fourth outer peripheral surface 20B are adjacent to each other through the second connection portion 20C. Note that the second connection portion 20C is represented as a point connecting the third outer peripheral surface 20A and the fourth outer peripheral surface 20B in the cross-sectional view of FIG. The second connection portion 20C is an annular region having the shaft 130 as a central axis.

  The third outer peripheral surface 20 </ b> A is provided on the outer end surface of the outer ring 20 at the outer end in the axial direction. The third connection surface 20Aa is a region including the second connection portion 20C in the third outer peripheral surface 20A, and is present radially inward from the second connection portion 20C. The third connection surface 20Aa is parallel to the radial direction, that is, perpendicular to the axial direction. The third connection surface 20Aa is an annular region having the shaft 130 as a central axis.

  The fourth connection surface 20Ba is a region including the second connection portion 20C in the fourth outer peripheral surface 20B. The fourth connection surface 20Ba is parallel to the axial direction. Accordingly, the third connection surface 20Aa of the third outer peripheral surface 20A and the fourth connection surface 20Ba of the fourth outer peripheral surface 20B are connected at substantially right angles at the second connection portion 20C. The fourth connection surface 20Ba is an annular region having the shaft 130 as a central axis.

  Of the outer ring 20, the end opposite to the direction in which the mounting portion 111 of the inner ring member 100 is present, that is, the inner end in the axial direction is sealed with a disk-shaped lid member 21.

  The plurality of rolling elements 30 are arranged in a space A configured between the first raceway surface 31 and the second raceway surface 32. The plurality of rolling elements 30 are ball rolling elements. The plurality of rolling elements 30 are held by a cage 40. The rolling element 30 may be a roller rolling element in addition to a ball rolling element.

  The retainer 40 includes a plurality of pockets. And each of the some rolling element 30 is accommodated in each of a some pocket.

  The sealing member 50 is provided in a gap formed between the inner ring member 100 and the outer ring 20, and seals the space A from the outside. The sealing member 50 includes a slinger (first sealing member) 51, a first rubber member (second sealing member) 52, and a third sealing member 53.

  The slinger 51 is a member provided so as to cover the outer peripheral surface around the first connecting portion 100 </ b> C of the inner ring member 100. The slinger 51 is an annular member having the shaft 130 as a central axis. The slinger 51 has an L shape along the first connection surface 100Aa and the second connection surface 100Ba in a radial cross section (a cross section including the shaft 130 of the bearing). The slinger 51 is provided in contact with the first connection surface 100Aa and the second connection surface 100Ba. The slinger 51 is made of, for example, SUS.

  The first rubber member 52 is attached to a portion of the slinger 51 along the second outer peripheral surface 100B. The first rubber member 52 is fixed to the slinger 51 with an adhesive or the like. The first rubber member 52 is an annular member having the shaft 130 as a central axis. The first rubber member 52 covers the end surface in the direction in which the attachment portion 111 of the slinger 51 exists, that is, the outer end surface in the axial direction. And the part 52a of the 1st rubber member 52 is provided so that it may get between the slinger 51 and the 2nd outer peripheral surface 100B. Since both the slinger 51 and the second outer peripheral surface 100B are made of metal, it is inevitable that a minute gap is formed between them when they are in direct contact. However, since a part 52a of the first rubber member 52 is interposed between the slinger 51 and the second outer peripheral surface 100B, the gap between the slinger 51 and the second outer peripheral surface 100B is filled by the part 52a of the first rubber member 52. , Moisture is prevented from entering the gap.

  The first rubber member 52 includes a protruding portion 52b protruding from the first connecting portion 100C toward the second connecting portion 20C, that is, inward in the axial direction. The protrusion 52b is an annular member having the shaft 130 as a central axis. A protruding end 52c of the protruding portion 52b forms a labyrinth gap with the third connection surface 20Aa. Since the protruding end 52c of the first rubber member 52 and the third connection surface 20Aa form a labyrinth gap, the entry of dust, water, muddy water, and the like from the outside into the bearing is suppressed.

  The third sealing member 53 includes a cored bar 54 and a second rubber member 55. The core metal 54 and the second rubber member 55 are bonded and fixed together with, for example, an adhesive. The third sealing member 53 is an annular member having the shaft 130 as a central axis. The third sealing member 53 is fitted on the inner peripheral surface of the outer ring 20.

  The core metal 54 is formed of a metal plate such as SUS, for example. The cored bar 54 is an annular member having the shaft 130 as a central axis.

  The second rubber member 55 includes a first lip portion 55 a that contacts the first outer peripheral surface 100 </ b> A of the inner shaft member 100 and a second lip portion 55 b that contacts the slinger 51. Since the first lip portion 55a is in contact with the first outer peripheral surface 100A in a state of being pressurized with respect to the first outer peripheral surface 100A, it is possible to suppress intrusion of dust, water, muddy water, and the like inside the bearing. Can do. Similarly, since the second lip portion 55b is in contact with the slinger 51 in a state of being pressurized with respect to the slinger 51, it is possible to prevent dust, water, muddy water, etc. from entering the bearing. it can. The second rubber member 55 is an annular member having the shaft 130 as a central axis.

  According to the first embodiment, the first connection surface 100Aa of the first outer peripheral surface 100A and the second connection surface 100Ba of the second outer peripheral surface 100B are connected at a substantially right angle at the first connection portion 100C, and are L-shaped. The slinger 51 is in contact with the first connection surface 100Aa and the second connection surface 100Ba. Therefore, the bent portion of the slinger 51 can be positioned on the first connection portion 100 </ b> C and fitted so as to be fixed to the inner ring member 100. As a result, the slinger 51 can be designed so that the slinger 51 has a shape that is not easily deformed. As a result, the first lip portion 55a and the second lip portion 55b are in contact with the first outer peripheral surface 100A and the slinger 51. Is stable. That is, a stable interference can be obtained.

  Then, by obtaining a stable interference allowance, as a result, it is possible to realize good sealing performance and good running stability of the bearing internal space.

<Embodiment 2>
Next, a bearing device according to Embodiment 2 of the present invention will be described. The bearing device according to the second embodiment has the same configuration as that of the first embodiment except that the sealing device 50A shown in FIG. 3 is provided.

  The sealing member 50 </ b> A includes a slinger 51, a first rubber member 52 </ b> A, and a third sealing member 53. The slinger 51 and the third sealing member 53 have the same configuration as that of the first embodiment.

  Similarly to the first embodiment, the first rubber member 52A is attached to a portion of the slinger 51 along the second outer peripheral surface 100B. Further, the first rubber member 52A includes a protruding portion 52b protruding from the first connecting portion 100C toward the second connecting portion 20C, that is, inward in the axial direction. The protruding end 52c of the protruding portion 52b has a raised portion 52d having a shape raised in the axial direction. The raised portion 52d is an annular member having the shaft 130 as a central axis. The raised portion 52d is in contact with the third outer peripheral surface 20A. Since the first rubber member 52A has the raised portion 52d that contacts the third outer peripheral surface 20A, excellent sealing performance can be obtained.

<Embodiment 3>
Next, a bearing device according to Embodiment 3 of the present invention will be described. The bearing device according to Embodiment 3 has the same configuration as that of Embodiment 1 except that a sealing member 50B shown in FIG. 4 is provided.

  The sealing member 50B includes a slinger 51B, a first rubber member 52, and a third sealing member 53. The first rubber member 52 and the third sealing member 53 have the same configuration as that of the first embodiment.

  As in the first embodiment, the slinger 51B is provided in an annular shape along the first connection portion 100C of the inner ring member 100, and the first connection surface 100Aa and the second connection surface 100Ba in the radial cross section (the cross section including the shaft 130). It has an L shape along. The slinger 51B is provided in contact with the second connection surface 100Ba, but is disposed at a distance from the first connection surface 100Aa.

  The slinger 51B may vary in the thickness (see d in FIG. 4) depending on the product. That is, there may be a small individual difference in the plate thickness at the manufacturing stage. When the thickness d of the slinger is larger than the design value by Δd, the distance between the surface of the slinger and the outer ring when the slinger contacts the first connection surface 100Aa of the first outer peripheral surface 100A (see FIG. 4 corresponds to a distance indicated by a in FIG. 4), which is smaller than the design value by Δd, and there is a possibility that the interference as designed may not be obtained. However, by providing a gap between the slinger 51B and the first connection surface 100Aa as in the second embodiment and adjusting the distance between the surface of the slinger 51B and the outer ring 20 to the design value a, the slinger 51B Regardless of the plate thickness d, the interference as designed can be obtained.

<Other embodiments>
In the above embodiment, in the outer ring 20, the third connection surface 20Aa of the third outer peripheral surface 20A and the fourth connection surface 20Ba of the fourth outer peripheral surface 20B are connected at substantially right angles at the second connection portion 20C. However, the present invention is not limited to this. The angle formed between the third connection surface 20Aa and the axis may be larger than the angle formed between the fourth connection surface 20Ba and the axis. That is, it is sufficient that the inclination of the third connection surface 20Aa with respect to the axial center is larger than the inclination of the surface of the fourth connection surface 20Ba with respect to the axial center. By doing so, the protruding end 52c of the first rubber member 52 and the third connection surface 20Aa can form a labyrinth gap in the second connection portion 20C.

  In the above embodiment, the protruding end 52c of the first rubber member 52 and the third connection surface 20Aa have been described as forming a labyrinth gap, but they may be in contact without forming a labyrinth gap. .

  As mentioned above, embodiment mentioned above is only the illustration for implementing this invention. Therefore, the present invention is not limited to the above-described embodiment, and can be implemented by appropriately modifying the above-described embodiment without departing from the spirit thereof.

  The present invention is useful for a bearing device that supports a wheel of an automobile or the like. Specifically, the structure of the sealing member that seals between the inner ring member and the outer ring is useful.

DESCRIPTION OF SYMBOLS 1 Wheel bearing apparatus 100 Inner ring member 100A 1st outer peripheral surface 100Aa 1st connection surface 100B 2nd outer peripheral surface 100Ba 2nd connection surface 100C 1st connection part 110 Hub axle 120 Inner ring 20 Outer ring 20A 3rd outer peripheral surface 20Aa 3rd connection surface 20B 4th outer peripheral surface 20Ba 4th connection surface 20C 2nd connection part 30 Rolling body 31 1st track surface 32 2nd track surface 40 Cage 50 Sealing member 51 Slinger (1st sealing member)
52 1st rubber member (2nd sealing member)
52c Protruding end 52d Raised portion (second contact portion)
53 3rd sealing member 55a 1st lip | rip part (1st contact part)
55b Second lip portion (third contact portion)
A space

Claims (4)

An inner ring member having a first raceway surface formed on the outer peripheral surface;
An outer ring having a second raceway surface facing the first raceway surface formed on an inner peripheral surface;
A plurality of rolling elements that roll in a space formed between the first raceway surface and the second raceway surface;
A cage for holding the plurality of rolling elements;
A sealing member for sealing a gap formed between the inner ring member and the outer ring;
With
The inner ring member is
An annular first outer peripheral surface on which the first raceway surface is formed;
An annular second outer peripheral surface continuous with the first outer peripheral surface;
Including
The first outer peripheral surface is
An annular region including a first connection portion to which the first outer peripheral surface and the second outer peripheral surface are connected, and is substantially parallel to the radial direction and is radially inward of the first connection portion. Connection surface,
Have
The second outer peripheral surface is
An annular region including the first connection portion, a second connection surface substantially parallel to the axial direction;
Have
The outer ring is
An annular third outer peripheral surface positioned so as to be aligned in the axial direction with a space from the second outer peripheral surface;
An annular fourth outer peripheral surface continuous to the third outer peripheral surface;
Including
The third outer peripheral surface is
An annular region including a second connecting portion to which the third outer peripheral surface and the fourth outer peripheral surface are connected, the third connecting surface being axially inward from the second connecting portion;
Have
The fourth outer peripheral surface is
A ring-shaped region including the second connection portion, wherein the angle formed by the axis is smaller than the angle formed by the third connection surface and the axis; a fourth connection surface;
Have
The sealing member is
An annular first sealing member having a radial cross-sectional shape that is L-shaped along the first connection surface and the second connection surface, and provided in contact with at least the second connection surface;
A labyrinth gap is attached to a portion of the first sealing member along the second outer peripheral surface and protrudes from the first connection portion toward the outer ring, and between the protruding end and the third connection surface. Or an annular second sealing member in which the protruding end and the third connection surface are in contact with each other,
An annular third sealing member attached to an inner peripheral surface of the outer ring and having a first contact portion that contacts the first outer peripheral surface of the inner ring member;
Including a bearing device.
The bearing device according to claim 1,
In the second connection portion, the third connection surface is substantially parallel to the radial direction, and the fourth connection surface is substantially parallel to the axial direction.
In the bearing device according to claim 1 or 2,
The second sealing member further includes
A bearing device including an annular second contact portion that has a shape protruding from the protruding end in the axial direction and contacts the third outer peripheral surface.
In the bearing apparatus as described in any one of Claims 1-3,
The third sealing member further includes
A bearing device including an annular third contact portion that contacts a surface along the first outer peripheral surface of the first sealing member.

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