Method for installing sealing device and slinger

Abstract

The present invention provides a sealing device that prevents foreign matter from easily entering the object to be sealed, and a method for attaching a slinger used in the sealing device. [Solution] A sealing device 1 for sealing an annular gap between two members assembled to rotate relative to each other concentrically, comprising a lip seal member 4 having a mounting ring 2 and an elastic body portion 3 covering the mounting ring 2, attached to a non-rotating stationary member 51, and a slinger 5 attached to a rotating member 52 and positioned opposite the lip seal member 4, wherein the elastic body portion 3 has a side lip 12 positioned on one end of the mounting ring 2 and slidably in contact with the slinger 5, and a receiving surface 15 positioned on the other end of the mounting ring 2 to receive fluid flowing in from the outside, and the slinger 5 has a sliding surface 21 on which the side lip 12 slides and a non-sliding surface 22 opposite to the sliding surface 21, and has a deflection structure for deflecting the flow of fluid flowing in from the outside from the receiving surface 15 to the non-sliding surface 22.

Description

Technical Field

[0001] The present invention relates to a sealing device and a method for attaching a slinger.

Background Art

[0002] For example, a hub bearing used in a vehicle such as an automobile is provided with a sealing device so that foreign matters such as rainwater and muddy water do not enter the inside (sealing target side) of the hub bearing. As a sealing device used for a hub bearing for a vehicle such as an automobile, for example, Patent Document 1 discloses a sealing device including a lip seal member and a slinger (seal flange member).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] As a conventional sealing device provided with such a slinger, an example is shown in FIG. 7. As shown in FIG. 7, the sealing device 100 includes a lip seal member 400 and a slinger 500, and prevents a fluid (indicated by an arrow in the figure) flowing in from the external anti-sealing target side O from flowing into the sealing target side M. However, in the sealing device 100, the non-sliding surface 220 on the opposite side of the sliding surface 210 where the side lips ①21, 122 slide is disposed on the sealing target side M rather than the receiving surface 150 of the elastic body portion 300 that receives the fluid. Therefore, foreign matters such as rainwater and muddy water hitting the receiving surface 150 may flow toward the hollow portion 208 side between the lip seal member 400 and the slinger 500 and flow into the sealing target side M. Therefore, there is room for improvement in the conventional sealing device with respect to the inflow of foreign matters.

[0005] From this perspective, the present invention aims to provide a sealing device that prevents foreign matter from easily flowing into the object to be sealed, and a method for attaching a slinger used in the sealing device. [Means for solving the problem]

[0006] The sealing device of the present invention is a sealing device for sealing an annular gap between two members that are assembled to rotate relative to each other concentrically, and comprises a lip seal member having a mounting ring and an elastic body portion covering the mounting ring, and attached to a non-rotating stationary member, and a slinger attached to a rotating member and positioned opposite to the lip seal member, wherein the elastic body portion has a side lip positioned on one end of the mounting ring and slidably in contact with the slinger, and a receiving surface positioned on the other end of the mounting ring to receive a fluid flowing in from the outside, and the slinger has a sliding surface on which the side lip slides and a non-sliding surface opposite to the sliding surface, and has a flow deflection structure for deflecting the flow of the fluid flowing in from the outside from the receiving surface to the non-sliding surface side.

[0007] According to the present invention, the sealing device can receive the flow of fluid from the outside and direct it from the receiving surface to the non-sliding surface. This makes it easier to prevent foreign matter from flowing into the object being sealed.

[0008] Furthermore, the sealing device of the present invention is a sealing device for sealing an annular gap between two members assembled to rotate relative to each other concentrically, and comprises a lip seal member having a mounting ring and an elastic body portion covering the mounting ring, and attached to a non-rotating stationary member, and a slinger attached to a rotating member and positioned opposite to the lip seal member, wherein the elastic body portion has a side lip positioned on one end of the mounting ring and slidably in contact with the slinger, and a receiving surface positioned on the other end of the mounting ring and receiving a fluid flowing in from the outside, and the slinger has a sliding surface on which the side lip slides and a non-sliding surface opposite to the sliding surface, wherein the non-sliding surface is positioned on the same plane as the receiving surface, or is positioned on the side opposite to the object to be sealed from the receiving surface.

[0009] According to the present invention, the sealing device can receive the flow of fluid from the outside and direct it from the receiving surface to the non-sliding surface. This makes it easier to prevent foreign matter from flowing into the object being sealed.

[0010] Furthermore, in the sealing device of the present invention, it is preferable that the fluid flowing in from the outside is received from the receiving surface and then flows to the non-sliding surface side, and then discharged to the outside by the centrifugal force generated by the rotation of the slinger.

[0011] According to the present invention, the sealing device makes it easier to prevent foreign matter from flowing into the object being sealed.

[0012] Furthermore, it is preferable that the sealing device of the present invention has a sealing member on the non-sliding surface side of the slinger that seals the space between the rotating member and the slinger.

[0013] According to the present invention, it is possible to seal the space between the rotating member and the slinger.

[0014] The present invention relates to a method for attaching a slinger used in a sealing device for sealing an annular gap between two members assembled to rotate relative to each other concentrically, wherein the sealing device comprises a lip seal member attached to a non-rotating stationary member, having an attachment ring and an elastic body portion covering the attachment ring, and a slinger attached to a rotating member and positioned opposite the lip seal member, wherein the elastic body portion has a side lip positioned on one end of the attachment ring and slidably in contact with the slinger, and a receiving surface positioned on the other end of the attachment ring to receive a fluid flowing in from the outside, and the slinger has a sliding surface on which the side lip slides and a non-sliding surface opposite to the sliding surface, and the slinger is attached to the rotating member such that the non-sliding surface is on the same plane as the receiving surface, or is positioned on the side opposite to the object to be sealed from the receiving surface.

[0015] According to the present invention, the sealing device can receive the flow of fluid from the outside and direct it from the receiving surface to the non-sliding surface. This makes it easier to prevent foreign matter from flowing into the object being sealed. [Effects of the Invention]

[0016] According to the sealing device of the present invention, foreign matter is less likely to flow into the object being sealed. According to the method of attaching the slinger of the present invention, a sealing device can be made in which foreign matter is less likely to flow into the object being sealed. [Brief explanation of the drawing]

[0017] [Figure 1] This is a schematic diagram showing the mounting state of the hub bearing. [Figure 2] This is a schematic cross-sectional view of a hub bearing equipped with a sealing device according to the first embodiment. [Figure 3] This is a schematic cross-sectional view of the sealing device according to the first embodiment. [Figure 4] This is a schematic cross-sectional view of a hub bearing equipped with a sealing device according to the second embodiment. [Figure 5] This is a schematic cross-sectional view of a sealing device according to the second embodiment. [Figure 6] This is a schematic cross-sectional view of a sealing device according to the third embodiment. [Figure 7] This is a schematic cross-sectional view of a conventional sealing device. [Modes for carrying out the invention]

[0018] Embodiments will be described below with reference to the drawings. However, the embodiments shown below exemplify a sealing device and a method for attaching a slinger for embodying the technical idea of the present embodiment, and are not limited thereto. In addition, the dimensions, materials, shapes, relative arrangements, etc. of the components described in the embodiments are merely examples and do not limit the scope of the present invention only thereto unless specifically described. Note that the sizes and positional relationships of the members shown in each drawing may be exaggerated or simplified for clarity of explanation. Also, in order to avoid making the drawings overly complex, the illustration of some elements may be omitted.

[0019] As shown in FIGS. 1 to 3, the sealing device 1 is a device that seals an annular gap between a non-rotating stationary member 51 and a rotating member 52 that are assembled to be relatively rotatable concentrically with each other. The sealing device 1 is used to seal between the outer ring, which is the stationary member 51, and the inner ring, which is the rotating member 52, in a hub bearing 50 attached to a hub of, for example, an automobile. The sealing device 1 is mainly arranged on the outboard side (the side where the tire 60 is mounted) of the hub bearing 50, but may also be arranged on the inboard side (the vehicle body side). Furthermore, the sealing device 1 can also be used in construction machinery, agricultural machinery, etc.

[0020] As shown in FIG. 3, the sealing device 1 is mainly composed of a lip seal member 4 having a mounting ring 2 and an elastic body portion 3 covering the mounting ring 2, and a slinger 5. The elastic body portion 3 is mainly composed of a main body portion 11, a side lip 12, and a grease lip 13. The elastic body portion 3 also has a receiving surface 15 for receiving a fluid flowing in from the outside (indicated by an arrow in the figure). The slinger 5 has a sliding surface 21 on which the side lip 12 slides and a non-sliding surface 22 on the opposite side of the sliding surface 21. The sealing device 1 also has a seal member 6 on the non-sliding surface 22 side of the slinger 5.

[0021] The sealing device 1 has a flow deflection structure that deflects the flow of fluid from the outside from the receiving surface 15 to the non-sliding surface 22. For example, the non-sliding surface 22 of the slinger 5 is located at a position that is coplane with the receiving surface 15 of the elastic body part 3, or at a position O that is on the side opposite to the object to be sealed (atmosphere side) to the receiving surface 15. In addition, as a method of attaching the slinger 5, the slinger 5 is attached to the rotating member 52 such that the non-sliding surface 22 of the slinger 5 is located coplane with the receiving surface 15 of the elastic body part 3, or at a position O that is on the side opposite to the object to be sealed to the receiving surface 15. This makes it difficult for foreign matter such as rainwater or muddy water that hits the receiving surface 15 to flow into the object to be sealed M. Embodiments will be described in detail below.

[0022] [First Embodiment] As shown in Figures 1 to 3, the hub bearing 50 is installed in the hub of, for example, an automobile. The hub bearing 50 comprises an outer ring which is an annular stationary member 51 with axis X as its central axis or substantially central axis, an inner ring which is an annular rotating member 52 with axis X as its central axis or substantially central axis, and a plurality of bearing balls 53 arranged between the stationary member 51 and the rotating member 52. In the operating state of the hub bearing 50, the stationary member 51 is fixed, and the rotating member 52 is rotatable relative to the stationary member 51. Specifically, the rotating member 52 has a first rotating member 52a and a second rotating member ring 52b. The bearing balls 53 are held by a cage 54.

[0023] The hub bearing 50 has a sealing device 1 attached to the side O that is not to be sealed, and another sealing device 55 attached to the side M that is to be sealed. The sealing devices 1 and 55 seal the gap between the stationary member 51 and the rotating member 52, preventing the internal lubricant from leaking out and preventing foreign matter such as rainwater, mud, and dust from entering the interior from the outside. The sealing device 55 is a conventionally known sealing device, and a detailed explanation is omitted. It should be noted that sealing device 1 can also be used as sealing device 55. The configuration of the hub bearing to which sealing device 1 is applied is not limited to the configuration of the hub bearing 50 described above.

[0024] As shown in Figures 1 to 3, the sealing device 1 is positioned in the hub bearing 50 to seal the annular gap between the two members, the outer ring which is a non-rotating stationary member 51 and the inner ring which is a rotating member 52.

[0025] The lip seal member 4 is a member that is attached to the non-rotating stationary member 51. The lip seal member 4 has a mounting ring 2 and an elastic body portion 3 that covers the mounting ring 2.

[0026] The mounting ring 2 consists of a cylindrical portion 2a and a flange portion 2b that protrudes radially inward from one end of the cylindrical portion 2a. The cylindrical portion 2a of the mounting ring 2 is attached to the stationary member 51. The mounting ring 2 is made of, for example, stainless steel or SPCC (cold-rolled steel).

[0027] The elastic body portion 3 comprises a main body portion 11 that covers the mounting ring 2, and a side lip 12 and a grease lip 13 positioned on one end of the main body portion 11 that slidably contact the slinger 5. The elastic body portion 3 also has a receiving surface 15 positioned on the other end of the mounting ring 2 to receive fluid flowing in from the outside. In this embodiment, the receiving surface 15 is positioned on the other end of the mounting ring 2. More specifically, the receiving surface 15 is formed on the other end of the main body portion 11 while covering the tip of the cylindrical portion 2a of the mounting ring 2. The receiving surface 15 of the elastic body portion 3 faces the side O that is not to be sealed. The elastic body portion 3 is formed from, for example, various rubber materials. Examples of rubber materials include synthetic rubbers such as nitrile rubber (NBR), hydrogenated nitrile rubber (H-NBR), acrylic rubber (ACM), and fluororubber (FKM).

[0028] The mounting ring 2 is manufactured, for example, by pressing or forging. The elastic body 3 is formed by crosslinking (vulcanization) molding using a mold. During this crosslinking molding, the mounting ring 2, which is placed inside the mold, is crosslinked and bonded to the elastic body 3, and the mounting ring 2 and the elastic body 3 are integrally formed.

[0029] An annular lip base portion 11a is formed at the radially inward end of the main body portion 11. The lip base portion 11a is the base end portion of the side lip 12 and the grease lip 13.

[0030] The side lip 12 is positioned on one end of the mounting ring 2 and extends inclined from the lip waist portion 11a toward the non-sealed object side O. The tip of the side lip 12 is in slidable contact with the flange portion 5b of the slinger 5.

[0031] The grease lip 13 is positioned on one end of the mounting ring 2 and extends inclined from the lip's waist portion 11a toward the sealing target side M. The tip of the grease lip 13 is in slidable contact with the inner circumferential cylindrical portion 5a of the slinger 5.

[0032] The slinger 5 is a component attached to the rotating member 52. The slinger 5 has an inner circumferential cylindrical portion 5a, a flange portion 5b, an outer circumferential cylindrical portion 5c, and a bent portion 5d that is provided between the inner circumferential cylindrical portion 5a and the flange portion 5b and bends. Specifically, the inner circumferential cylindrical portion 5a is attached to the flat portion 31 of the rotating member 52 and has a cylindrical shape. The bent portion 5d is inclined from the end of the inner circumferential cylindrical portion 5a toward the side to be sealed O. The flange portion 5b protrudes radially outward from the end of the bent portion 5d. The outer circumferential cylindrical portion 5c protrudes from the end of the flange portion 5b toward the side to be sealed M. The rotating member 52 has a flat portion 31 to which the slinger 5 is attached, and a curved surface portion 32 that is continuous with the flat portion 31 and curves. The bending starting point P between the inner circumferential cylindrical portion 5a and the bent portion 5d is provided within the flat portion 31.

[0033] The slinger 5 has a sliding surface 21 on which the side lip 12 slides against the flange portion 5b, and a non-sliding surface 22 opposite to the sliding surface 21. The non-sliding surface 22 of the slinger 5 faces the side O that is not to be sealed. The slinger 5 is positioned opposite the lip seal member 4. Specifically, the flange portion 5b of the slinger 5 is positioned opposite the flange portion 2b of the mounting ring 2, and the outer cylindrical portion 5c of the slinger 5 is positioned opposite the cylindrical portion 2a of the mounting ring 2. A hollow portion 8 is formed between the flange portion 2b of the mounting ring 2 and the slinger 5. The slinger 5 is made of, for example, stainless steel or SPCC (cold-rolled steel). The slinger 5 is manufactured, for example, by pressing or forging.

[0034] The sealing device 1 has a deflection structure for deflecting the flow of fluid flowing in from the outside from the receiving surface 15 of the elastic body part 3 to the non-sliding surface 22 of the slinger 5. Specifically, in this embodiment, the non-sliding surface 22 of the slinger 5 is located in a position that is coplane with the receiving surface 15 of the elastic body part 3. Also, in this embodiment, the slinger 5 is attached to the rotating member 52 so that the non-sliding surface 22 of the slinger 5 is located in a position that is coplane with the receiving surface 15 of the elastic body part 3. In this embodiment, the non-sliding surface 22 of the slinger 5 is set to be coplane with the receiving surface 15 of the elastic body part 3, but is not limited to this. The fluid flowing in from the outside may be located a few millimeters away on the sealing target side M or the non-sealing target side O within the range in which it flows from the receiving surface 15 of the elastic body part 3 to the non-sliding surface 22 of the slinger 5.

[0035] The sealing device 1 has a sealing member 6 on the non-sliding surface 22 side of the slinger 5 that seals the rotating member 52 and the slinger 5. The sealing member 6 is formed in an annular shape with a predetermined thickness on the non-sliding surface 22 of the slinger 5, and one end is in contact with the rotating member 52. In this embodiment, the sealing member 6 is positioned to cover the bent portion 5d. The shape of the sealing member 6 can be adjusted as appropriate depending on the mounting state of the sealing device 1. The sealing member 6 is made of various rubber materials, for example. Examples of rubber materials include synthetic rubbers such as nitrile rubber (NBR), hydrogenated nitrile rubber (H-NBR), acrylic rubber (ACM), and fluororubber (FKM).

[0036] Next, the operation and effects of the sealing device 1 according to this embodiment will be described. As shown in Figure 3, the non-sliding surface 22 of the slinger 5 is located in the same plane as the receiving surface 15 of the elastic body portion 3. As a result, the sealing device 1 can receive the flow of fluids flowing in from the outside from the receiving surface 15 to the non-sliding surface 22. Specifically, fluids such as rainwater and muddy water flow in from the outside, the non-sealing target side O, into the fluid accumulation space 7, which is the part where the fluid accumulates. Here, the fluid flows into the fluid accumulation space 7 from the radially outside via the rotating member 52. The fluid that has flowed into the fluid accumulation space 7 is received from the receiving surface 15 to the non-sliding surface 22 and proceeds toward the non-sliding surface 22. After that, the fluid flows out again radially outward via the rotating member 52, due to the centrifugal force generated by the rotation of the slinger 5, and is discharged to the outside. This makes it easier to prevent foreign matter from flowing into the sealing target side M (hollow portion 8 side).

[0037] Furthermore, the slinger 5 has a bent portion 5d, which increases the distance from the lip waist portion 11a to the flange portion 5b. This allows for a wider hollow portion 8, making it easier to secure space for the side lip 12. Also, because the hollow portion 8 is wider, even if foreign matter flows into the hollow portion 8, it is easier for the foreign matter to remain in the hollow portion 8, thus making it easier to prevent foreign matter from flowing into the sealed object M. In addition, the slinger 5 has improved rigidity due to the bent portion 5d, making it easier to prevent deformation of the slinger 5. Moreover, by setting the bending start point P between the inner circumferential cylindrical portion 5a and the bent portion 5d within the flat portion 31 of the rotating member 52, it is possible to prevent the slinger 5 from riding up onto the curved surface portion 32 of the rotating member 52, thereby reducing the risk of deformation or detachment of the slinger 5. In other words, by providing the bent portion 5d, it is possible to secure a large hollow portion 8 while preventing the slinger 5 from riding up onto the curved surface portion 32 of the rotating member 52.

[0038] Furthermore, the sealing device 1, by having a sealing member 6, can reliably seal the space between the slinger 5 and the rotating member 52.

[0039] [Second Embodiment] Figure 4 is a schematic cross-sectional view of a hub bearing equipped with a sealing device according to the second embodiment. Figure 5 is a schematic cross-sectional view of the sealing device according to the second embodiment. As shown in Figures 4 and 5, the sealing device 1A according to the second embodiment differs from the first embodiment in that the shape of the lip seal member 4A and the shape of the slinger 5A are different. Since the shape of the sealing device differs from that of the first embodiment, the structure near the part of the hub bearing where the sealing device is attached also differs slightly from that of the first embodiment. In the second embodiment, the differences between the sealing device and the first embodiment will be described in detail.

[0040] The lip seal member 4A consists of a mounting ring 2A comprising a cylindrical portion 2Aa, an inner circumferential flange portion 2Ab extending radially inward from one end of the cylindrical portion 2Aa, and an outer circumferential flange portion 2Ac extending radially outward from the other end of the cylindrical portion 2Aa. The cylindrical portion 2Aa of the mounting ring 2A is attached to the stationary member 51A. The outer circumferential flange portion 2Ac of the mounting ring 2A is attached to the stationary member 51A via an elastic body portion 3A. The elastic body portion 3A comprises a main body portion 11A that covers the mounting ring 2A, and a first side lip 12A1, a second side lip 12A2, and a grease lip 13A that are positioned on one end of the main body portion 11A and slidably contact the slinger 5A.

[0041] An annular lip base portion 11Aa is formed at the radially inward end of the main body portion 11A. The lip base portion 11Aa is the base end portion of the first side lip 12A1, the second side lip 12A2, and the grease lip 13A.

[0042] The first side lip 12A1 is positioned on one end of the mounting ring 2A and extends inclined from the lip waist portion 11Aa toward the non-sealed object side O. The tip of the first side lip 12A1 is in slidable contact with the flange portion 5Ab of the slinger 5A.

[0043] The second side lip 12A2 is positioned on one end of the mounting ring 2A and extends inclined from the lip waist portion 11Aa toward the non-sealed object side O. The tip of the second side lip 12A2 is in slidable contact with the flange portion 5Ab of the slinger 5.

[0044] The grease lip 13A is positioned on one end of the mounting ring 2A and extends inclined from the lip's waist portion 11Aa toward the object to be sealed M. The tip of the grease lip 13A is in slidable contact with the inner circumferential cylindrical portion 5Aa of the slinger 5.

[0045] The elastic body portion 3A is provided with an outer ring projection 14, which is an annular projection around the axis X. The outer ring projection 14 is located on the other end side of the main body portion 11A and extends radially outward from the upper surface of the elastic body portion 3A that covers the outer flange portion 2Ac toward the side not to be sealed O. The elastic body portion 3A is also located on the other end side of the mounting ring 2A and has a receiving surface 15A that receives fluid flowing in from the outside. In this embodiment, the receiving surface 15A is located from the cylindrical portion 2Aa of the mounting ring 2A to the position of the outer flange portion 2Ac and is formed continuously with the outer ring projection 14.

[0046] The slinger 5A is composed of an inner circumferential cylindrical portion 5Aa, a flange portion 5Ab that extends radially outward from the end of the inner circumferential cylindrical portion 5Aa, and an outer circumferential cylindrical portion 5Ac that extends inclined toward the sealing target side M from the end of the flange portion 5Ab. The slinger 5A has a sliding surface 21A on the flange portion 5Ab, on which the first side lip 12A1 and the second side lip 12A2 slide, and a non-sliding surface 22A on the opposite side of the sliding surface 21A. The non-sliding surface 22A of the slinger 5A faces the side O that is not the sealing target. The slinger 5A is positioned opposite the lip seal member 4A. A hollow portion 8 is formed between the inner circumferential flange portion 2Ab of the mounting ring 2A and the slinger 5A.

[0047] The sealing device 1A, like the sealing device 1 of the first embodiment, has a deflection structure for deflecting the flow of fluid flowing in from the outside from the receiving surface 15A of the elastic body part 3A to the non-sliding surface 22A of the slinger 5A. Specifically, in this embodiment, the non-sliding surface 22A of the slinger 5A is located in the same plane as the receiving surface 15A of the elastic body part 3A. Furthermore, as a method for attaching the slinger 5A, the slinger 5A is attached to the rotating member 52A such that the non-sliding surface 22A of the slinger 5A is located in the same plane as the receiving surface 15A of the elastic body part 3A. In this way, the sealing device 1A has a deflection structure for deflecting the flow of fluid flowing in from the outside from the receiving surface 15A of the elastic body part 3A to the non-sliding surface 22A of the slinger 5A.

[0048] The sealing device 1A according to the second embodiment also has a structure for receiving and distributing fluids flowing in from the outside, and therefore provides the same effects as the sealing device 1 according to the first embodiment. That is, the fluid that flows into the fluid accumulation space 7 from the outside, the non-sealing target side O, is received from the receiving surface 15A and flows towards the non-sliding surface 22A side, and proceeds towards the non-sliding surface 22 side. After that, the fluid is again discharged to the outside by the centrifugal force generated by the rotation of the slinger 5A, radially outward via the rotating member 52A, towards the non-sealing target side O. This makes it easier to prevent foreign matter from flowing into the sealing target side M.

[0049] [Third Embodiment] Figure 6 is a schematic cross-sectional view of the sealing device according to the third embodiment. As shown in Figure 6, the sealing device 1B according to the third embodiment differs from the first embodiment in that the non-sliding surface 22B of the slinger 5B is located on the side O opposite to the object to be sealed, relative to the receiving surface 15 of the elastic body portion 3B of the lip seal member 4B. Furthermore, because the non-sliding surface 22B of the slinger 5B is located on the side O opposite to the object to be sealed, relative to the receiving surface 15, the hollow portion 8 is wider and the side lip 12B is longer, which is another difference from the first embodiment.

[0050] In the sealing device 1B according to the second embodiment, there is also a deflection structure that deflects the flow of fluid from the outside from the receiving surface 15 to the non-sliding surface 22. This makes it easier to prevent foreign matter from flowing into the side to be sealed M.

[0051] The sealing device of the present invention has been described above, but the design can be modified as appropriate without violating the spirit of the invention. For example, the side lip is not limited to one or two, but may be three or more. Also, the sealing device may not have a sealing member. [Explanation of symbols]

[0052] 1 Sealing device 2 Mounting ring 3 Elastic body 4 Lip seal member 5 Slinger 6. Sealing member 7 Fluid reservoir space 8 Hollow part 11 Main body 12 Side Lip 13 Grease Lip 14 Outer ring protrusion 15 Receiving surface 21 Sliding surface 22 Non-sliding surface 50 Hub bearing 51 Stationary member 52 Rotating member M (Sealed side) O Non-sealed side

Claims

1. A sealing device for sealing an annular gap between two members that are assembled to rotate relative to each other concentrically, A lip seal member having a mounting ring and an elastic portion covering the mounting ring, which is attached to a non-rotating stationary member, The rotating member is attached to a slinger which is positioned opposite the lip seal member, The elastic body portion has a side lip positioned on one end of the mounting ring and slidably in contact with the slinger, and a receiving surface positioned on the other end of the mounting ring to receive fluid flowing in from the outside. The slinger has a sliding surface on which the side lip slides and a non-sliding surface on the opposite side of the sliding surface. A sealing device having a deflection structure for deflecting the flow of a fluid incoming from the outside from the receiving surface to the non-sliding surface side.

2. A sealing device for sealing an annular gap between two members that are assembled to rotate relative to each other concentrically, A lip seal member having a mounting ring and an elastic portion covering the mounting ring, which is attached to a non-rotating stationary member, The rotating member is attached to a slinger which is positioned opposite the lip seal member, The elastic body portion has a side lip positioned on one end of the mounting ring and slidably in contact with the slinger, and a receiving surface positioned on the other end of the mounting ring to receive fluid flowing in from the outside. The slinger has a sliding surface on which the side lip slides and a non-sliding surface on the opposite side of the sliding surface. The non-sliding surface is located in a position that is coplanar with the receiving surface, or is located on the side opposite to the object to be sealed from the receiving surface.

3. The sealing device according to claim 1 or claim 2, wherein the fluid flowing in from the outside is received and then flows from the receiving surface to the non-sliding surface side, and is then discharged to the outside by the centrifugal force generated by the rotation of the slinger.

4. The sealing device according to claim 1 or claim 2, further comprising a sealing member on the non-sliding surface side of the slinger for sealing the space between the rotating member and the slinger.

5. A method for attaching a slinger used in a sealing device that seals an annular gap between two members that are assembled to rotate relative to each other concentrically, The sealing device comprises a lip seal member having a mounting ring and an elastic body portion covering the mounting ring, which is attached to a non-rotating stationary member, and a slinger which is attached to a rotating member and positioned opposite the lip seal member. The elastic body portion has a side lip positioned on one end of the mounting ring and slidably in contact with the slinger, and a receiving surface positioned on the other end of the mounting ring to receive fluid flowing in from the outside. The slinger has a sliding surface on which the side lip slides and a non-sliding surface on the opposite side of the sliding surface. A method for attaching a slinger to a rotating member, wherein the non-sliding surface is located on the same plane as the receiving surface, or is located on the side opposite to the object to be sealed from the receiving surface.

Images