JP7598641B2 - Sealing device and bearing device equipped with same - Google Patents

Description

The present invention relates to a sealing device that seals between a fixed member and a rotating member that rotates relative to the fixed member, and a bearing device equipped with the same.

For example, a bearing device for a wheel support of an automobile or the like is known that is composed of an outer ring and an inner ring supported so as to be rotatable relative to each other, and a sealing device with a seal lip of various configurations is attached to the axial ends of the outer ring and the inner ring to prevent the intrusion of muddy water, dust, etc. into the bearing space. When the outer ring or the inner ring rotates, the temperature in the bearing space rises due to the frictional energy between the seal lip and the rotating member. Then, the pressure in the bearing space rises, and air in the bearing space may leak from the sliding interface between the seal lip and the rotating member. When the wheel subsequently decelerates or stops, the temperature in the bearing space drops, and the bearing space becomes negative pressure. As a result, the seal lip sticks to the member it comes into contact with and is adsorbed thereto, which is considered to be a cause of an increase in rotational torque. Therefore, the following Patent Documents 1 and 2 disclose a device equipped with a ventilation part that allows ventilation when the seal lip is in contact with the member.

DE102015220367 publication JP 2017-187118 A

However, when the ventilation section constituted by the through-hole, notch, protrusion, etc. disclosed in the above Patent Documents 1 and 2 is placed in a position close to the outer space of the fixed member that is easily exposed to muddy water, etc., with the sealing device attached, there is a risk that muddy water, etc. may penetrate through the ventilation section. Therefore, in the sealing devices of Patent Documents 1 and 2, the provision of the ventilation section for the purpose of suppressing an increase in rotational torque may prevent the desired performance, such as sealing performance, from being achieved.

The present invention has been made in consideration of the above-mentioned situation, and aims to provide a sealing device that is capable of exhibiting sealing performance and other desired performance properties after providing a communication portion, and a bearing device equipped with the same.

The sealing device according to the present invention is an annular sealing device for sealing a bearing space provided between two members, a fixed-side member and a rotating-side member supported so as to be rotatable relative to the fixed-side member, and includes a core body attached to the fixed-side member and a slinger attached to the rotating-side member, the core body and the slinger being mounted between the two members in a mutually assembled state, the core body having a cylindrical portion fitted into the fixed-side member and a seal body having a plurality of seal lips fixed to the core body and in sliding contact with or adjacent to the slinger, the slinger having a cylindrical portion fitted into the rotating-side member and a sealing member having a cylindrical portion fitted into the rotating-side member and a sealing member having a cylindrical portion fitted into the rotating-side member. The seal lip has a circular plate portion extending radially outward from the axial outer end of the cylindrical portion, and the seal lip arranged at the radially innermost position and closest to the bearing space, which is not visible from the outer surface of the circular plate portion of the slinger when assembled, is provided with a communication portion formed to connect the space partitioned by the seal lip to the space adjacent to the space, and an indicator portion is provided on the axial outer end side of the cylindrical portion of the core body so that the circumferential position of the communication portion can be recognized , and the indicator portion is configured to be identifiable by shape .
The sealing device according to the present invention is an annular sealing device for sealing a bearing space provided between two members, a fixed-side member and a rotating-side member supported so as to be rotatable relative to the fixed-side member, and includes a core body attached to the fixed-side member and a slinger attached to the rotating-side member, the core body and the slinger being mounted between the two members in a mutually assembled state, the core body having a cylindrical portion fitted into the fixed-side member and a seal body fixed to the core body and having a plurality of seal lips which are in sliding contact with or close to the slinger, the slinger having a cylindrical portion fitted into the rotating-side member and a seal body ... The slinger has a cylindrical portion and a circular plate portion extending radially outward from the axial outer end of the cylindrical portion, and the seal lip arranged at the radially innermost position and closest to the bearing space, which is not visible from the outer surface of the circular plate portion of the slinger when assembled, is provided with a communication portion formed to connect the space partitioned by the seal lip to the space adjacent to the seal lip, and an indicator portion is provided on the axial outer end side of the cylindrical portion of the core body so that the circumferential position of the communication portion can be recognized, and the indicator portion is painted so as to be visually identifiable.

Further, a bearing device according to the present invention is provided with a fixed-side member and a rotating-side member which rotate coaxially relative to one another, and a sealing device mounted between these two members , the sealing device comprising a core body attached to the fixed-side member and a slinger attached to the rotating-side member, the core body and the slinger being mounted between the two members in a mutually combined state, the core body having a cylindrical portion fitted to the fixed-side member, and a seal body having a plurality of seal lips which are fixed to the core body and are in sliding contact with or close to the slinger, the slinger having a cylindrical portion fitted to the rotating-side member and a disc portion extending radially outward from an axial outer end of the cylindrical portion of the slinger, Among the seal lips, the seal lip arranged at the radially innermost position, which is not visible from the outer surface side of the disc portion of the slinger when assembled and is closest to the bearing space provided between the two members, is provided with a communicating portion formed to connect the space partitioned by the seal lip with the space adjacent to the space, and an indicator portion is provided on the axial outer end side of the cylindrical portion of the core body so that the circumferential position of the communicating portion can be recognized, and the indicator portion is configured to be identifiable by shape, and the fixed side member is provided with a bearing side indicator portion which allows the circumferential position of the communicating portion to be recognized when the sealing device is mounted between the two members .
Further, a bearing device according to the present invention is provided with a fixed-side member and a rotating-side member which rotate coaxially relative to one another, and a sealing device mounted between these two members, the sealing device comprising a core body attached to the fixed-side member and a slinger attached to the rotating-side member, the core body and the slinger being mounted between the two members in a mutually combined state, the core body having a cylindrical portion fitted to the fixed-side member, and a seal body having a plurality of seal lips which are fixed to the core body and in sliding contact with or adjacent to the slinger, the slinger having a cylindrical portion fitted to the rotating-side member and a disc portion extending radially outward from an axial outer end of the cylindrical portion of the slinger, the seal lip Among the seal lips, the seal lip arranged at the radially innermost position that is not visible from the outer surface side of the disc portion of the slinger when assembled and at the position closest to the bearing space provided between the two members is provided with a communicating portion formed to connect the space partitioned by the seal lip with the space adjacent to the space, and an indicator portion is provided on the axial outer end side of the cylindrical portion of the core body so that the circumferential position of the communicating portion can be recognized, and the indicator portion is painted so that it is visually identifiable, and the fixed side member is provided with a bearing side indicator portion which allows the circumferential position of the communicating portion to be recognized when the sealing device is mounted between the two members.

With the sealing device of the present invention, the above-mentioned configuration allows the sealing device to be installed between the fixed side member and the rotating side member after providing a communication portion so as to exhibit sealing performance and other desired performance characteristics.

Furthermore, with the bearing device according to the present invention, the above-mentioned configuration allows the sealing device to be provided with a communication portion and then attached between the fixed-side member and the rotating-side member so as to effectively exhibit other desired performance characteristics, such as sealing performance. Furthermore, when fixing the fixed-side member to the mechanical device, even if the indicator portion provided on the sealing device cannot be confirmed because the sealing device is attached between the fixed-side member and the rotating-side member, the position of the indicator portion can be estimated using the bearing-side indicator portion provided on the fixed-side member as a guide. Therefore, by confirming the bearing-side indicator portion, the communication portion of the sealing device can be positioned at the desired circumferential position with respect to the mechanical device.

1 is a schematic vertical cross-sectional view showing an example of a bearing assembly to which a sealing device according to the present invention is applied; 3A and 3B are schematic cross-sectional views showing an example of a sealing device according to a first embodiment of the present invention, in which (a) is an enlarged view of a portion X1 in Fig. 1 and a cross-sectional view of a position indicated by an arrow A in Fig. 3B, and (b) is an enlarged view of a portion X2 in Fig. 1 and a cross-sectional view of a position indicated by an arrow B in Fig. 3B. 2A is a schematic plan view of the sealing device as viewed from a Z1 direction in FIG. 2A, and FIG. 2B is a schematic side view of the sealing device as viewed from a Z2 direction in FIG. 5A and 5B are diagrams showing modified examples of the sealing device, where 5A corresponds to a cross-sectional view taken at a position indicated by an arrow C in FIG. 5A, and 5B corresponds to a cross-sectional view taken at a position indicated by an arrow D in FIG. 4A is a schematic side view of the sealing device as viewed from the Z2 direction shown in FIG. 4A, and FIGS. 4B and 4C are views showing modified examples thereof. FIG. 1A and 1B are schematic cross-sectional views showing an example of a sealing device according to a second embodiment of the present invention, where 1A is a view corresponding to an enlarged view of a portion X1 in FIG. 1, and 1B is a view corresponding to an enlarged view of a portion X2 in FIG. 1A and 1B are schematic cross-sectional views showing an example of a sealing device according to a third embodiment of the present invention, in which 1A is an enlarged view of a Y1 portion in FIG. 1 and 1B is an enlarged view of a Y2 portion in FIG. 8(a) is a partially enlarged view showing a further modified example of the sealing device shown in FIG. 4(a), and FIG. 8(b) is a schematic outline side view seen from a direction E in FIG. 8(a). FIG. 4A is a schematic longitudinal sectional view showing an example of a bearing device according to another embodiment of the present invention, and FIG. 4B is an explanatory view equivalent to FIG. 3B of the same bearing device, with an outer ring and a bearing side indicator portion added. 5A and 5B are schematic longitudinal sectional views showing different modified examples of the bearing device.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of the present invention will be described with reference to the drawings. Note that in some drawings, some of the detailed reference numerals used in other drawings are omitted.
The sealing device 10, 11 according to the present invention is an annular sealing device 10, 11 that seals between a fixed-side member 2 and a rotating-side member 5 supported so as to be rotatable relative to the fixed-side member 2. The sealing device 10, 11 includes a core body 16 attached to the fixed-side member 2, and a seal body 17, 19 fixed to the core body 16 and having a plurality of seal lips that are in sliding contact with or close to the rotating-side member 5. The sealing device 10, 11 also includes a communication portion 20 that is provided on at least one of the plurality of seal lips and is formed so that a space partitioned by the seal lip communicates with a space adjacent to the space, and an indicator portion 13 that is provided so that the position of the communication portion 20 in the circumferential direction can be recognized. A detailed description will be given below.

First Embodiment
The first embodiment will be described first with reference to FIGS. 1 to 3. FIG.
FIG. 1 shows a bearing device 1 that supports an automobile wheel (not shown) so as to be rotatable about its axis. This bearing device 1 is generally composed of an outer ring 2 corresponding to the fixed side member described above, an inner ring 5 corresponding to the rotating side member described above, and two rows of rolling elements (balls) 6 ... interposed between the outer ring 2 and the inner ring 5. The inner ring 5 is composed of a hub ring 3 and an inner ring member 4, and the inner ring member 4 is fitted integrally with the vehicle body side of the hub ring 3. A drive shaft 7 is coaxially spline-fitted with the hub ring 3, and the drive shaft 7 is connected to a drive source (drive transmission part) (not shown) via a constant velocity joint 8. The drive shaft 7 is integrated with the hub ring 3 by a nut 9, and the hub ring 3 is prevented from falling off the drive shaft 7. The inner ring 5 (hub ring 3 and inner ring member 4) is rotatable about its axis with respect to the outer ring 2, and the outer ring 2 and the inner ring 5 constitute two members that rotate relatively to each other, forming an annular bearing space S. Two rows of rolling elements 6 are held by a retainer 6a, and the raceways 2a of the outer ring 2, the hub ring 3, and the raceways 3a, 4a of the inner ring member 4 are rollably interposed within the bearing space S. The hub ring 3 has a cylindrical hub ring body 30 and a hub flange 32 formed to extend radially outward from the hub ring body 30 via a rising base 31, and a wheel is attached and fixed to the hub flange 32 by bolts 33 and nuts (not shown).
In the following, the side facing the wheel along the axial direction L (the left side in FIG. 1) will be referred to as the wheel side, and the side facing the vehicle body (the right side in FIG. 1) will be referred to as the vehicle body side.

The sealing device 10 according to the first embodiment shown in Figures 2(a) and 2(b) is a sealing device 10A that is attached to the end (part X in Figure 1) between the outer ring 2 on the vehicle body side and the inner ring member 4. Figure 2(a) is an enlarged view of part X1 in Figure 1, and is a cross-sectional view of the position indicated by arrow A in the sealing device 10A shown in Figure 3(b). Figure 2(b) is an enlarged view of part X2 in Figure 1, and is a cross-sectional view of the position indicated by arrow B in the sealing device 10A shown in Figure 3(b).

The sealing device 10A includes a core body 16 having a generally L-shaped cross section on one side, a seal body 17 made of an elastic material such as rubber and integrally molded by being vulcanized and bonded to the core body 16, and a slinger 14 fitted onto the outer circumferential surface 4b of the inner ring member 4. An example in which the core body 16, seal body 17, and slinger 14 are combined to provide a sealing function will be described below.
The core body 16 is formed by pressing a steel plate such as SPCC. The core body 16 has a cylindrical portion 160 that is fitted to the vehicle body side inner diameter surface 2b of the outer ring 2, which is the fixed side member, and a disk portion 161 that extends radially inward from an axial inner end portion 160a of the cylindrical portion 160 of the core body 16.

The seal body 17 has a seal base 170 and a plurality of seal lips 171, 172, 173 extending from the seal base 170. The seal lip 171 is the seal lip located on the outermost side in the radial direction D' (see FIG. 1) and arranged in a position close to the outer space. The seal lip 173 is the seal lip located on the innermost side in the radial direction D' and arranged in a position close to the bearing space S. The seal lip 172 is the seal lip located between the seal lip 171 and the seal lip 173. Of these, the seal lips 171 and 172 are formed by gradually expanding in diameter and extending at the same angle toward the outside in the axial direction L, and are axial lips (side lips) that slide against the axial inner surface 141c of the disc portion 141 of the slinger 14. The seal lip 173 is a radial lip that is formed to extend radially inward toward the bearing space S and is in sliding contact with the outer peripheral surface 140b of the cylindrical portion 140 of the slinger 14 described later. The seal lip 173 has a communication portion 20 that is partially cut out at a tip 173a that is in sliding contact with the outer peripheral surface 140b of the cylindrical portion 140 of the slinger 14. Specifically, in the first embodiment, the communication portion 20 is formed in the seal lip 173 that is located radially innermost among the multiple seal lips 171, 172, and 173 and is less likely to be exposed to muddy water or the like. In the first embodiment, the communication portion 20 is formed in a plurality of portions in the circumferential direction of the seal lip 173 (see FIG. 3B). The communication portion 20 is formed so that the space 100 partitioned by the seal lip 172 and the seal lip 173 communicates with the bearing space S, which is a space adjacent to the space 100. In Figs. 2(a) and 2(b), the two-dot chain lines of the seal lips 171, 172, and 173 indicate the original shapes before deformation.

The seal base 170 is arranged so as to wrap around a part of the axial inner surface 161a of the disc portion 161 of the core body 16, around the radial inner end 161b, and cover the entire axial outer surface 161c of the disc portion 161. The seal base 170 also covers the entire inner circumferential surface 160b of the cylindrical portion 160 of the core body 16, wraps around the axial outer end 160c of the cylindrical portion 160, and reaches the outer diameter surface 160d of the cylindrical portion 160, and is fixed integrally to the core body 16. The core body 16 has an annular protrusion 174 that protrudes radially outward in the portion that reaches the outer diameter surface 160d of the cylindrical portion 160. This annular protrusion 174 is formed so as to be interposed in a compressed state between the vehicle body side inner diameter surface 2b of the outer ring 2 and the outer diameter surface 160d of the cylindrical portion 160 when the core body 16 is fitted inside the outer ring 2. 2(a) and 2(b), the two-dot chain line of the annular projection 174 indicates the original shape before compression.

The seal base 170 is provided with an indicator portion 13 formed in a convex shape as shown in FIG. 2(a) at a portion that wraps around the outer end portion 160c in the axial direction of the cylindrical portion 160. The indicator portion 13 in this embodiment is formed to protrude outward in the axial direction L from the outer surface 2d on the vehicle body side of the outer ring 2. The indicator portion 13 is also formed in a convex shape protruding outward in the axial direction L from the outer surface 150a in the axial direction L of the main body portion 150 of the magnetic encoder 15. The indicator portion 13 is also provided so that the position of the communication portion 20 formed in the seal lip 173 can be recognized. The indicator portion 13 in this embodiment is formed in a rectangular shape when viewed from the front from the axial direction L, and is configured to protrude from other portions in one part of the circumferential direction so as to be identifiable by shape as shown in FIG. 3(a). In the example of FIG. 2, one indicator portion 13 is provided as shown in FIG. 2(a), and is provided so as to be at the same position as the communication portion 20 in the circumferential direction. On the other hand, the communication portion 20 is not formed in the portion of the seal lip 173 of the sealing device 10A shown in FIG. 2(b). Therefore, the portion where the seal base 170 wraps around the outer end 160c in the axial direction L of the cylindrical portion 160 does not have any convex portions, and like other portions, is formed to be approximately flush with the outer surface 2d on the vehicle body side of the outer ring 2 and the outer surface 150a in the axial direction of the main body 150 of the magnetic encoder 15.

The slinger 14, with which the seal lips 171, 172, and 173 slide, is attached to the inner ring member 4 and constitutes a part of the rotating member. The slinger 14 has a cylindrical portion 140 that is fitted onto the outer peripheral surface 4b of the inner ring member 4, and a disk portion 141 that extends radially outward from the axial outer end 140a of the cylindrical portion 140. A magnetic encoder 15, in which magnetic powder such as ferrite is bonded by a rubber material, is vulcanized and bonded to the axial outer surface 141a of the disk portion 141. The magnetic encoder 15 is harder than rubber and more elastic than the steel plate that constitutes the slinger 14. The magnetic encoder 15 has a main body portion 150 that covers the axial outer surface 141a of the disk portion 141, and an end cover portion 151 that covers the radial outer end 141b of the disk portion 141. The main body portion 150 is magnetized with a large number of N poles and S poles in the circumferential direction of the main body portion 150. The rotation of the wheels of the automobile is detected by a magnetic sensor 12 and a magnetic encoder 15 indicated by dotted lines in FIG.

According to the above configuration, when the sealing device 10A is mounted between the outer ring 2 and the inner ring 5, the convex index portion 13 can be used as a guide to recognize the circumferential position of the communication portion 20 provided on the seal lip 173. Therefore, the sealing device 10A can be mounted between the outer ring 2 and the inner ring 5 with the communication portion 20 positioned at the desired position while recognizing the position of the communication portion 20 from the formation position of the index portion 13. In other words, when the sealing device 10A is mounted between the outer ring 2 and the inner ring 5, the formation position of the index portion 13 can be used as a guide without worrying about the formation position of the communication portion 20, and the mounting work can be performed efficiently. In addition, since the index portion 13 is configured to double as a positioning means for the mounting position, it is possible to avoid erroneous mounting in a state deviated from the desired position. And, according to the above configuration, the space 100 partitioned by the seal lips 172, 173 that slide against the slinger 14 and the bearing space S adjacent to the space 100 can circulate fluid (air) through the communication portion 20. Therefore, it is possible to prevent the internal pressure of the space 100 partitioned by the seal lips 172, 173 from fluctuating, causing the sliding seal lips 172, 173 to stick to the slinger 14. Furthermore, since the circumferential position of the communicating portion 20 can be easily recognized by the indicator portion 13, it is possible to take measures such as arranging the communicating portion 20 at a position where muddy water or the like is less likely to penetrate, thereby improving the sealing performance. Therefore, after providing the communicating portion 20, the sealing device 10A can be installed so that desired performance such as reduction in rotational torque in addition to sealing performance can be exhibited.

Next, the relationship between the positions of the indicator portion 13 and the communication portion 20 will be further described.
The indicator portion 13 is provided in accordance with the formation position of the communication portion 20 as shown in FIG.
3A is a diagram for explaining the formation state of the indicator portion 13, and FIG. 3B is a diagram for explaining the formation position of the communication portion 20. In FIG. 3B, the upper side of the paper is the "top" of the zenith side in the top-to-bottom direction when attached to the outer ring 2, and the lower side is the "bottom" of the nadir side when attached to the outer ring 2. The sealing device 10A has a communication portion 20 formed on the zenith side (upper position) in the top-to-bottom direction, and the indicator portion 13 is provided at the same position as the communication portion 20 in the circumferential direction. That is, since the indicator portion 13 is also formed on the zenith side like the communication portion 20 in this example, if the sealing device 10A is attached so as to be located on the zenith side when assembled to the outer ring 2, the communication portion 20 can be assembled in a state where it is arranged at a desired position. 3(a) and the like, the indicator portion 13 is configured to be identifiable by shape, and therefore, compared to a case where the position of the communication portion 20 is indicated by painting, it is possible to avoid the indicator portion 13 disappearing during distribution until the sealing device 10A is attached, or the indicator portion 13 becoming unidentifiable due to dirt. In particular, the indicator portion 13 of the first embodiment is formed in a convex shape that protrudes in the axial direction L, and therefore the indicator portion 13 is easier to recognize, compared to an indicator portion 13 that is concave. Furthermore, the indicator portion 13 is provided so as to be at the same position in the circumferential direction as one of the multiple communication portions 20 provided, and therefore the position of the communication portion 20 can be easily estimated from the position of the indicator portion 13.

<Modification of the First Embodiment>
Next, a sealing device 10A' that is a modified example of the sealing device 10A according to the first embodiment will be described with reference to Figures 4 and 5. Note that parts common to the first embodiment are given the same reference numerals as much as possible, and descriptions of the configurations, actions, effects, etc. will be omitted.
In this modified example, the configuration of the indicator portion 13 is different. Also, the relationship between the positions of the indicator portion 13 and the communication portion 20 is different from that of the first embodiment. Specifically, the indicator portion 13 shown here is provided on a magnetic encoder 15 to which the indicator portion 13 is fixed to a slinger 14. Also, the indicator portion 13 does not protrude toward the axial direction L as in the first embodiment, but is formed in a convex shape that protrudes further in the radial direction D' than other portions. This configuration also makes the indicator portion 13 easier to recognize compared to an indicator portion 13 that is concave.

In addition, in this modified example, the sealing device 10A' has an index portion 13 formed on the zenith side as shown in Figure 4(a), and its position is shifted circumferentially by approximately 50°, which is greater than 45°, from the position where the communicating portion 20 is formed (see Figure 5(a)).
According to the above configuration, by arranging the indicator portion 13 on the zenith side in the vertical direction, the position of the indicator portion 13 can be easily recognized when assembling the sealing device 10A'. Furthermore, as the above configuration, if the communication portion 20 can be arranged at a position shifted 0° to 45° toward the zenith side from the center position in the vertical direction, muddy water or the like can be prevented from reaching the communication portion 20 even if muddy water or the like enters from either the top or bottom.

Next, modified examples of the position at which the communication portion 20 is formed will be further described with reference to FIGS.
In the first embodiment, an example in which the communication portion 20 formed on the seal lip 173 is formed on the zenith side has been described, but the present invention is not limited to this, and a plurality of communication portions 20 may be formed in the circumferential direction of the seal lip 173. As shown in FIG. 5(a), the communication portions 20 may be provided at positions shifted by about 50° from the zenith position in the left and right circumferential directions. Also, as shown in FIG. 5(b), a plurality of communication portions 20 may be provided at positions other than the zenith position and the nadir position. Furthermore, as shown in FIG. 5(c), the communication portions 20 may be provided at the center positions in the top-bottom direction. In any case, the communication portions 20 can suppress the adhesion of the seal lip 173 to the slinger 14 with which it slides, thereby suppressing an increase in torque.

Second Embodiment
Next, a sealing device 10B according to a second embodiment will be described with reference to Fig. 6. Note that parts common to the first embodiment will be given the same reference numerals as much as possible, and descriptions of the configurations, actions, effects, etc. will be omitted.
The sealing device 10B shown in the second embodiment is different from the first embodiment in that the cylindrical portion 160 of the core body 16 is fitted to the outer diameter surface 2e of the outer ring 2 on the vehicle body side, and the disk portion 161 is formed by extending radially inward from the outer end portion 160f of the cylindrical portion 160 in the axial direction L. It is also different from the first embodiment in that the seal body 17 is arranged on the outer diameter surface 160d of the cylindrical portion 160 and the outer surface 161c of the disk portion 161. It is also different in that the slinger 14 has a cross section on one side formed in a substantially U-shape and is provided with a second cylindrical portion 142 arranged to cover the outer diameter surface 2e of the outer ring 2. It is also different in that the communication portion 20 is not a notch shape but a through hole, and that the seal lip 171 on which the communication portion 20 is formed is not in sliding contact with the slinger 14. This will be further explained below.

The core body 16 has a cross-sectional shape on one side that is approximately L-shaped. The core body 16 has a cylindrical portion 160 that is fitted onto the outer diameter surface 2e of the outer ring 2, and a disk portion 161 that is formed by extending inward in the radial direction D' from the outer end portion 160f of the cylindrical portion 160 in the axial direction L. The disk portion 161 has a notch 161d formed at the end portion on the inner surface 161a side of the inner end portion 161b in the radial direction.

The seal body 17 includes a seal base 170 fixed to the outer diameter surface 160d and the outer side surface 161c, a plurality of seal lips 171, 172, 173, and a rising portion 175. The seal base 170 is fixed to the notch 161d of the disk portion 161, and is provided so as to cover the entire outer side surface 161c of the disk portion 161 and the surface extending to the outer diameter surface 160d and the inner end portion 160e of the cylindrical portion 160. The rising portion 175 is formed by protruding outward in the radial direction D' from a portion of the seal base 170 covering a part of the outer diameter surface 2e of the outer ring 2. The rising portion 175 is provided so as to be spaced apart from the inner end portion 142a in the axial direction L of the second cylindrical portion 142 in the slinger 14, and a labyrinth portion R is formed between the rising portion 175 and the inner end portion 142a in the axial direction L of the second cylindrical portion 142 of the slinger 14. The upright portion 175 is formed so that its end portion 175a protrudes to be at approximately the same height as the outer peripheral surface 142b of the second cylindrical portion 142 of the slinger 14, thereby providing an effect of preventing the intrusion of muddy water and the like.

The seal lips 171 and 172 are formed extending outward in the axial direction L from the seal base 170. The seal lip 173 extends radially inward from the seal base 170, and its tip is formed toward the bearing space S. The seal lip 171 is located on the outermost side in the radial direction D' among the multiple seal lips. The seal lip 171 has an extension portion 171a formed extending straight in the axial direction from the seal base 170, and a bent portion 171c formed by bending the outer end portion 171b of the extension portion 171a in the axial direction L to the outside in the radial direction D' at approximately 90°. Therefore, the bent portion 171c including the tip 171d of the seal lip 171 does not slide against the disc portion 141 of the slinger 14, and a labyrinth is formed between the inner surface 141c of the disc portion 141 and the bent portion 171c. The extension 171a, the bent portion 171c, and the seal base 170 of the seal lip 171 form a concavely partitioned space 120. A through-hole 20 is provided at the middle of the extension 171a disposed on the apex side of the seal lip 171. The communication portion 20 is formed so that the concavely partitioned space 120 and the space 110 adjacent to the space 120 communicate with each other. As a result, muddy water or the like that has infiltrated from the outside through the labyrinth portion R infiltrates into the sealing device 10B along the seal base 170, but remains in the concavely partitioned space 120. The muddy water or the like that remains in the space 120 flows downward along the extension 171a and the bent portion 171c, and then can be discharged to the outside from the lower labyrinth portion R along the second cylindrical portion 142 of the slinger 14. Furthermore, some of the muddy water remaining in the space 120 flows down through the communicating portion 20 to the adjacent space 110, as the communicating portion 20 functions as a drain hole. The water can then travel down the seal lip 172, the disk portion 141, and the second cylindrical portion 142 and be discharged to the outside from the labyrinth portion R below. The indicator portion 13 is provided at a position opposite to the communicating portion 20 in the circumferential direction, and is therefore provided on the nadir side. The indicator portion 13 shown here is formed in a notched shape that is recessed in a radial direction.

The seal lip 172 is located between the seal lip 171 and the seal lip 173, and is formed so as to gradually expand and extend outward in the axial direction, and is in sliding contact with the axial inner surface 141c of the disc portion 141 of the slinger 14.

According to the above configuration, when the sealing device 10B is mounted between the outer ring 2 and the inner ring 5, the concave index portion 13 can be used as a guide to recognize the circumferential position of the communication portion 20 provided in the seal lip 171. Therefore, the sealing device 10B can be mounted between the outer ring 2 and the inner ring 5 in a state in which the communication portion 20 is disposed at a desired position while recognizing the position of the communication portion 20 from the formation position of the index portion 13. Then, the space 120 partitioned by the seal lip 171 and the space 110 adjacent to the space 120 can pass fluid (air, muddy water, etc.) through the communication portion 20, thereby achieving the above-mentioned discharge effect. In addition, since the circumferential position of the communication portion 20 can be easily recognized by the index portion 13, the position where the communication portion 20 is formed can be disposed at the zenith position and the sealing device 10B can be mounted so that the desired performance such as sealing performance can be exhibited.
The configuration of the seal lip 173 is the same as that of the first embodiment, and therefore a description thereof will be omitted.

Third Embodiment
Next, a sealing device 11 according to a third embodiment will be described with reference to FIG.
The sealing device 11 according to the third embodiment shown in Fig. 7(a) and Fig. 7(b) is different from the sealing device 10 (10A, 10A', 10B) according to the first and second embodiments in that it is a sealing device on the wheel side, not a sealing device on the vehicle body side. Therefore, the sealing device 11 does not include a slinger 14, and the seal lips 191, 192, 193 are in direct sliding contact with the hub flange 32 constituting the rotating side member, which is different from the sealing device 10 (10A, 10A', 10B) according to the first and second embodiments. Also, it is different in that the indicator portion 13 is a convex shape that protrudes in the radial direction, and the convex shape is formed so as to engage with the concave portion 2f formed on the wheel side inner diameter surface 2c of the outer ring 2 constituting the fixed side member. Further details will be described.

The sealing device 11 comprises a core body 18 fitted into the wheel side inner diameter surface 2c of the outer ring 2, a seal base 190 fixed to the core body 18, and a seal body 19 having a plurality of seal lips 191, 192, 193 that slide against the hub flange 32, which is the rotating side member 5.

The core body 18 is formed by pressing a steel plate such as SPCC. The core body 18 has a cylindrical portion 180 that is fitted into the wheel side inner diameter surface 2c of the outer ring 2, and an inclined portion 181 that inclines downward in the axial direction L from the axial inner end 180a of the cylindrical portion 180. The core body 18 also has a disk portion 182 that extends radially inward from the axial inner end 181a of the inclined portion 181. The seal base 190 of the seal body 19 is fixed to a part of the outer surface 182a of the disk portion 182 in the axial direction L. Furthermore, the seal base 190 of the seal body 19 wraps around the radial inner end 182b in the radial direction D', covers the entire surface of the axial inner surface 182c, and is fixed integrally to the core body 18 so as to cover the front surface of the outer diameter surface 181b of the inclined portion 181.

The seal lip 191 formed on the seal body 19 is the seal lip located at the outermost position in the radial direction and arranged at a position close to the outer space. The seal lip 193 is the seal lip located at the innermost position in the radial direction and arranged at a position close to the bearing space S. The seal lip 192 is the seal lip located between the seal lip 191 and the seal lip 193. Of these, the seal lips 191 and 192 are axial lips (side lips) that are formed by gradually expanding and extending at the same angle toward the outer side in the axial direction L and that slide against the rising base 31. The seal lip 193 is a radial lip that is formed by extending toward the inner side in the radial direction and toward the bearing space S and slides against the outer circumferential surface 30a of the hub wheel main body 30. A communication portion 20 that is partially cut out is formed at the tip 192a of the seal lip 192. Specifically, in the third embodiment, the communication portion 20 is formed in the seal lip 193 located in the middle among the multiple seal lips 191, 192, 193, which is less likely to be exposed to muddy water, etc. The communication portion 20 is formed so that a space 200 partitioned by the seal lip 192 and the seal lip 193 communicates with a space 210 adjacent to the space 200. In Fig. 7, the two-dot chain lines of the seal lips 191, 192, 193 indicate the original shapes before deformation.

A convex indicator portion 13 is provided that protrudes radially outward from the seal base 190 of the seal body 19 located between the outer diameter surface 181b of the inclined portion 181 of the core body 18 and the wheel side inner diameter surface 2c of the outer ring 2. This indicator portion 13 is formed to engage with the recessed portion 2f of the outer ring 2, which is the fixed member. This indicator portion 13 is also provided so as to be in the same position in the circumferential direction as the communication portion 20, and in this example, the indicator portion 13 is formed at the "heaven" position on the zenith side in the vertical direction.

As described above, when the sealing device 11 is attached to the outer ring 2, if the convex index portion 13 is attached so as to engage with the recess 2f formed on the outer ring 2, the attachment position of the sealing device 11 in the circumferential direction is automatically determined. Therefore, when attaching the sealing device 11 to the outer ring 2, the attachment work can be performed efficiently by using the formation position of the index portion 13 as a guide without worrying about the formation position of the communication portion 20. In addition, since it is configured to double as a means for positioning the attachment position, it is possible to avoid erroneous attachment in a state deviated from the desired position.

The configuration of the sealing device 10 (10A to 10C), 11 according to the above embodiment is not limited to the illustrated example. The configuration, shape, number, etc. of the core body 16, 18, the seal body 17, 19, the slinger 14, the magnetic encoder 15, the indicator portion 13, the communication portion 20, and the seal lip 171, 172, 173, 191, 192, 193 are not limited to the above embodiments. For example, in the embodiment shown in FIG. 4, the indicator portion 13 is provided on the magnetic encoder 15 fixed to the slinger 14, but in the case of a sealing device 10A'' that does not have a magnetic encoder 15 as shown in FIG. 8(a), the indicator portion 13 may be provided on the slinger 14. In this case, a recess may be formed on the outer end portion 141b of the disc portion 141 of the slinger 14, and this recess may be used as the indicator portion 13 (see FIG. 8(b)). In addition, for example, the communication portion 20 in the illustrated example is shown as a notch shape and a through hole, but is not limited to this. Any configuration may be used as long as the space partitioned by the seal lip and the space adjacent to the space are formed to communicate with each other. Therefore, a protrusion may be partially provided on the seal lip that slides against the rotating member. In addition, the communication portion 20 in the first and third embodiments is shown as an example of a notch shape, but it may be replaced with a through hole. The communication portion 20 may be formed anywhere on the seal lip as long as it is a position where the desired performance can be exhibited. For example, if the communication portion 20 is a through hole, a plurality of communication portions 20 may be formed on one seal lip. In the third embodiment, an example is shown in which the indicator portion 13 engages with the recess 2f of the outer ring 2, but this example may be applied to the sealing device 10 of the first embodiment. The configuration of the indicator portion 13 may also be, for example, a hemispherical convex shape or a triangular shape in a side view. In addition, the indicator portion 13 may be formed by a recess, and a convex portion formed on the fixed member may be engaged with the recess. Furthermore, in the above embodiment, an example in which the indicator portion 13 is configured to be identifiable by shape has been described, but this does not exclude an example in which the indicator portion 13 is configured to be identifiable by painting, and a mark or the like that can be identified by painting may be attached. In addition, the indicator portion 13 is not visually identifiable, but is not excluded from an example in which the indicator portion 13 is identifiable by electronic devices, and for example, an index mark that can be recognized by an image camera or the like (for example, fluorescent paint that emits when irradiated with ultraviolet light) may be used as the indicator portion. In this case, an automatic machine such as a robot may recognize the circumferential position of the communication portion 20 based on the position recognized by the electronic device, and the sealing device may be installed between the fixed side member and the rotating side member. In addition, the position of the indicator portion 13 may be provided at any position as long as it is exposed to the outside, and is not limited to the above embodiment. In addition, the rising portion 175 shown in FIG. 6 is not limited to being approximately the same height as the outer circumferential surface 142b of the slinger 14, and may be a height that protrudes from the outer circumferential surface 142b.

<Another embodiment of the bearing device>
Next, a bearing device 1A, which is another embodiment of the bearing device 1 equipped with the above-mentioned sealing devices 10 (10A to 10C), 11, will be described with reference to Fig. 9. Note that parts common to the bearing device 1 used in each embodiment of the above-mentioned sealing devices 10, 11 are given the same reference numerals as much as possible, and descriptions of their configurations, actions, effects, etc. will be omitted. Also, in Fig. 9 and Fig. 10, the upper side of the paper is the "top" which is the zenith side in the vertical direction when mounted on the body of an automobile, and the lower side is the "bottom" which is the nadir side when mounted on the body.
The bearing device 1A of this embodiment includes a fixed member (outer ring 2) and a rotating member (inner ring 5) that rotate coaxially relative to one another, and the above-mentioned sealing devices 10, 11 that are attached to these. The fixed member (outer ring 2) is provided with a bearing side indicator 40 that allows the circumferential position of the communication part 20 to be recognized when the sealing devices 10, 11 are attached between the fixed member (outer ring 2) and the rotating member (inner ring 5). This will be described in detail below.

The bearing device 1A shown in Figure 9 has a different configuration of the outer ring 2 compared to the bearing device 1 in each embodiment of the sealing devices 10 and 11 described above. The outer ring 2 is provided with a bearing side indicator portion 40 near the middle portion in the axial direction L on the zenith side (upper side) in the up-down direction. The bearing side indicator portion 40 is formed in a convex shape that protrudes outward in the radial direction D' from the outer diameter surface (outer circumference) 2e of the outer ring 2.

Figure 9(b) is a diagram equivalent to Figure 3(b) with the outer ring 2 and the bearing side indicator portion 40 added to explain the formation position of the bearing side indicator portion 40. As shown in Figures 9(a) and (b), the sealing device 10 is mounted between the outer ring 2 and the inner ring 5 so that the communication portion 20 is in the same circumferential position as the bearing side indicator portion 40 of the outer ring 2. Note that while Figure 9(b) shows the communication portion 20 in the sealing device 10 on the vehicle body side, the communication portion 20 in the sealing device 11 on the wheel side is also mounted between the outer ring 2 and the inner ring 5 so that it is in the same circumferential position as the bearing side indicator portion 40.

In the bearing device 1A of this embodiment, the communication portion 20 of the sealing device 10, 11 is located at the position where the bearing side indicator portion 40 is provided in the circumferential direction. Therefore, even if the indicator portion 13 provided on the sealing device 10 cannot be confirmed when the outer ring 2 is fixed to the vehicle body, the position of the indicator portion 13 can be easily estimated using the bearing side indicator portion 40 provided on the outer ring 2 as a guide. Therefore, the bearing device 1A can be mounted on the vehicle body with the communication portion 20 placed in the desired position while recognizing the position of the communication portion 20 from the formation position of the bearing side indicator portion 40. In other words, when mounting the bearing device 1A to the vehicle body, the mounting work can be performed efficiently by using the formation position of the bearing side indicator portion 40 as a guide without worrying about the formation position of the communication portion 20. In addition, in this embodiment, the bearing side indicator portion 40 is provided on the outer diameter surface 2e of the outer ring 2, so that the bearing side indicator portion 40 can be easily confirmed when the bearing device 1A is fixed to the vehicle body. Therefore, the circumferential position of the communicating portion 20 can be easily recognized by the bearing-side indicator portion 40, and the communicating portion 20 can be disposed at a position where muddy water or the like is less likely to penetrate, thereby improving sealing performance. Thus, after providing the communicating portion 20 in the sealing device 10, the bearing assembly 1A including the sealing device 10 can be mounted on the body of an automobile so that desired performance such as reduction in rotational torque in addition to sealing performance can be exhibited.

<Modification of Bearing Device 1A>
Next, a bearing device 1A' which is a modified example of the bearing device 1A will be described with reference to FIG.
The bearing device 1A' in Fig. 10(a) is an example in which the configuration of the bearing side indicator part 40 is different from that of the bearing device 1A in Fig. 9. The bearing side indicator part 40 shown here is provided on the outer surface 2d of the outer ring 2 on the vehicle body side of the zenith side (upper side) in the vertical direction. Furthermore, the bearing side indicator part 40 is formed in a convex shape that protrudes outward in the axial direction L from the outer surface 2d of the outer ring 2 further than other parts of the outer ring 2, rather than protruding in the radial direction D' like the bearing side indicator part 40 in Fig. 9. This configuration also makes it easier to check the bearing side indicator part 40 compared to bearing side indicator parts 40 that are formed in a concave shape.

Next, a bearing device 1A″, which is a further modified example of the bearing device 1A, will be described with reference to FIG. 10(b). In the bearing device 1A″, the outer ring 2 is provided with a mounting flange 2g that protrudes outward in the radial direction D′ around the entire circumference of the outer diameter surface 2e near the middle part in the axial direction L. The mounting flange 2g is provided with bolt insertion holes 2h at equal intervals in the circumferential direction, through which bolts are inserted when mounting the bearing device 1A″ to a vehicle body. The mounting flange 2g is provided with a bearing side indicator portion 40 near the middle part in the axial direction L on the zenith side (upper side) in the up-down direction. The bearing side indicator portion 40 is formed in a convex shape that protrudes outward in the radial direction D′ beyond the outer diameter surface of the mounting flange 2g. The bearing side indicator portion 40 is easy to check because it protrudes outward in the radial direction D′ beyond the outer ring 2 and other parts of the mounting flange 2g.
In this way, the bearing devices 1A' and 1A'', which are modifications of the bearing device 1A, have the same effects as the bearing device 1A.

The configuration of the bearing device 1A (1A', 1A'') according to the above embodiment is not limited to the illustrated example. In addition, as long as the circumferential position of the communication portion 20 can be recognized, the communication portion 20 is not limited to being provided at the same circumferential position as the bearing side indicator portion 40. In addition, in the illustrated example, the bearing side indicator portion 40 is shown to be formed in a convex shape, but is not limited to this. For example, the bearing side indicator portion 40 may be formed in a notched shape or a concave shape. In addition, the degree of protrusion of the bearing side indicator portion 40 is not limited to the illustrated example. Furthermore, the bearing side indicator portion 40 is not limited to being configured to be identifiable in terms of shape, and may be a visually identifiable paint or mark. In addition, although the bearing side indicator portion 40 is not visually identifiable, examples in which it is made identifiable by electronic devices are not excluded, and for example, an indicator mark that can be recognized by an image camera or the like (for example, a fluorescent paint that emits when irradiated with ultraviolet light) may be used as the bearing side indicator portion 40. In this case, an automatic machine such as a robot recognizes the circumferential position of the communication part 20 based on the position recognized by the electronic device, and then the bearing device 1A is attached to the mechanical device. The position of the bearing side indicator part 40 may be any position that is exposed to the outside, and is not limited to the above embodiment. The bearing devices 1, 1A, 1A', 1A" may be attached to various mechanical devices in which the bearing devices 1, 1A, 1A', 1A" are used, and are not limited to the body of an automobile.

1, 1A, 1A', 1A'' Bearing device 2 Outer ring (fixed member)
5 Inner ring (rotating member)
10 (10A to 10C), 11 sealing device 13 index portion 15 magnetic encoder 16, 18 core body 17, 19 seal body 171, 172, 173 seal lip 191, 192, 193 seal lip 20 communication portion 40 bearing side index portion

Claims (11)

A ring-shaped sealing device that seals a bearing space provided between two members, a fixed member and a rotating member supported so as to be rotatable relative to the fixed member,
A core body is attached to the fixed member, and a slinger is attached to the rotating member,
The core body and the slinger are attached between the two members in a combined state,
The core body has a cylindrical portion that is fitted to the fixed member, and a seal body that is fixed to the core body and has a plurality of seal lips that are in sliding contact with or close to the slinger,
The slinger has a cylindrical portion that is fitted to the rotating member and a disk portion that extends radially outward from an axial outer end of the cylindrical portion of the slinger,
Among the seal lips, the seal lip arranged at the radially innermost position, which is not visible from the outer surface side of the disc portion of the slinger in the assembled state, and closest to the bearing space , is provided with a communication portion formed so that the space partitioned by the seal lip communicates with a space adjacent to the space partitioned by the seal lip,
an indicator portion is provided on an outer end side in an axial direction of the cylindrical portion of the core body so that a position of the communication portion in a circumferential direction can be recognized ;
A sealing device characterized in that the indicator portion is configured to be identifiable by shape . A ring-shaped sealing device that seals a bearing space provided between two members, a fixed member and a rotating member supported so as to be rotatable relative to the fixed member,
A core body is attached to the fixed member, and a slinger is attached to the rotating member,
The core body and the slinger are attached between the two members in a combined state,
The core body has a cylindrical portion that is fitted to the fixed member, and a seal body that is fixed to the core body and has a plurality of seal lips that are in sliding contact with or close to the slinger,
The slinger has a cylindrical portion that is fitted to the rotating member and a disk portion that extends radially outward from an axial outer end of the cylindrical portion of the slinger,
Among the seal lips, the seal lip arranged at the radially innermost position, which is not visible from the outer surface side of the disc portion of the slinger in the assembled state, and closest to the bearing space , is provided with a communication portion formed so that the space partitioned by the seal lip communicates with a space adjacent to the space partitioned by the seal lip,
an indicator portion is provided on an outer end side in an axial direction of the cylindrical portion of the core body so that a position of the communication portion in a circumferential direction can be recognized ;
The sealing device according to claim 1, wherein the indicator portion is painted so as to be visually identifiable . The sealing device according to claim 1 ,
A sealing device characterized in that the indicator portion is formed in a convex shape protruding in an axial or radial direction. The sealing device according to any one of claims 1 to 3,
The sealing device, wherein the index portion is provided on the seal body and is formed so as to engage with the fixed member. A ring-shaped sealing device that seals between a fixed member and a rotating member supported so as to be rotatable relative to the fixed member,
A core body attached to the fixed member;
a seal body fixed to the core body and having a plurality of seal lips that are in sliding contact with or close to the rotating member;
a communication portion provided in at least one of the seal lips and formed so that a space partitioned by the seal lip communicates with a space adjacent to the space partitioned by the seal lip;
An indicator portion provided so that the position of the communication portion in the circumferential direction can be recognized,
A slinger is further provided which is attached to the rotating member.
A sealing device characterized in that the indicator portion is provided on a magnetic encoder fixed to the slinger. A ring-shaped sealing device that seals between a fixed member and a rotating member supported so as to be rotatable relative to the fixed member,
A core body attached to the fixed member;
a seal body fixed to the core body and having a plurality of seal lips that are in sliding contact with or close to the rotating member;
a communication portion provided in at least one of the seal lips and formed so that a space partitioned by the seal lip communicates with a space adjacent to the space partitioned by the seal lip;
An indicator portion provided so that the position of the communication portion in the circumferential direction can be recognized,
A slinger is further provided which is attached to the rotating member.
A sealing device characterized in that the indicator portion is provided on the slinger. The sealing device according to any one of claims 1 to 6,
A sealing device, characterized in that the indicator portion is provided at the same position as the communication portion in the circumferential direction. The sealing device according to any one of claims 1 to 6,
A sealing device, characterized in that the indicator portion is provided at a position that is shifted circumferentially by more than 45° and less than 90° from a position where the communication portion is formed. A bearing device including a fixed member and a rotating member which rotate coaxially relative to one another, and a sealing device mounted between these two members,
The sealing device includes a core body attached to the fixed member and a slinger attached to the rotating member,
The core body and the slinger are attached between the two members in a combined state,
The core body has a cylindrical portion that is fitted to the fixed member, and a seal body that is fixed to the core body and has a plurality of seal lips that are in sliding contact with or close to the slinger,
The slinger has a cylindrical portion that is fitted to the rotating member and a disk portion that extends radially outward from an axial outer end of the cylindrical portion of the slinger,
Among the seal lips, the seal lip arranged at the radially innermost position that cannot be seen from the outer surface side of the disc portion of the slinger in the assembled state and at the position closest to the bearing space provided between the two members is provided with a communication portion formed so that the space partitioned by the seal lip communicates with a space adjacent to the space partitioned by the seal lip,
an indicator portion is provided on an outer end side in an axial direction of the cylindrical portion of the core body so that a position of the communication portion in a circumferential direction can be recognized;
The indicator portion is configured to be identifiable by shape,
A bearing device characterized in that the fixed side member is provided with a bearing side indicator portion that enables the circumferential position of the communicating portion to be recognized when the sealing device is mounted between the two members. A bearing device including a fixed member and a rotating member which rotate coaxially relative to one another, and a sealing device mounted between these two members,
The sealing device includes a core body attached to the fixed member and a slinger attached to the rotating member,
The core body and the slinger are attached between the two members in a combined state,
The core body has a cylindrical portion that is fitted to the fixed member, and a seal body that is fixed to the core body and has a plurality of seal lips that are in sliding contact with or close to the slinger,
The slinger has a cylindrical portion that is fitted to the rotating member and a disk portion that extends radially outward from an axial outer end of the cylindrical portion of the slinger,
Among the seal lips, the seal lip arranged at the radially innermost position that cannot be seen from the outer surface side of the disc portion of the slinger in the assembled state and at the position closest to the bearing space provided between the two members is provided with a communication portion formed so that the space partitioned by the seal lip communicates with a space adjacent to the space partitioned by the seal lip,
an indicator portion is provided on an outer end side in an axial direction of the cylindrical portion of the core body so that a position of the communication portion in a circumferential direction can be recognized;
The indicator portion is painted so as to be visually identifiable,
A bearing device characterized in that the fixed side member is provided with a bearing side indicator portion that enables the circumferential position of the communicating portion to be recognized when the sealing device is mounted between the two members. The bearing device according to claim 9 or 10 ,
the fixed member is an outer ring,
The bearing device according to claim 1, wherein the bearing side indicator portion is provided on an outer periphery of the outer ring.

Images