A radial gap between an outer circumferential surface of an encoder member joined to an outward flange portion of a slinger and an inner circumferential surface of a seal body includes a first gap portion and a second gap portion closer to an inward flange portion of a core metal than the first gap portion is. The outer circumferential surface that defines the first gap portion is a cylindrical outer circumferential surface, and the radial gap in the first gap portion is substantially constant in an axial direction. The outer circumferential surface that defines the second gap portion is a conical outer circumferential surface reduced in diameter as approaching the inward flange portion of the core metal in the axial direction, and the radial gap in the second gap portion is gradually increased as approaching the inward flange portion of the core metal in the axial direction.

A sealing structure with an annular pocket and a sealing device includes an annular pocket and a sealing device. The pocket is provided in a slinger, and the sealing device is attached to a housing of a differential device. The slinger is arranged on an output shaft of the differential device. A recessed part of the pocket is defined by an inner peripheral tubular portion, an outer peripheral tubular portion and a bottom portion of the slinger. The outer peripheral surface of the pocket is formed in the outer peripheral tubular portion of the slinger. The outer peripheral surface of the pocket increases in diameter toward the outside in an axis direction. A side lip of the sealing device extends in the outward direction, and an annular gap is formed between the side lip and the pocket.

A structural unit for assembly to a trunnion of a universal joint bearing providing a cup, a sealing ring, which is fixed to the cup, and a shield, which is connected to the cup in a state in which the structural unit is not assembled to the trunnion. The cup includes a bottom and the sealing ring provides at least one sealing lip that points in a direction with an axial component towards the bottom.

A coupling system for a sealing assembly with a rotating annular member. In particular, a bearing ring provided with a flange. The sealing assembly provides at least one first annular shield having a sleeve portion integrally coupled with the rotating annular member and a flange portion that radially and overhangingly protrudes from the sleeve portion and is arranged close to the flange. The sleeve portion is defined by a solid tubular body of rotation delimited by a mounting surface facing towards the rotating annular member and having cylindrical geometry, In combination, the sleeve portion couples with an assembly seat of the rotating annular member, formed by an annular shallow recess delimited by a cylindrical bottom surface and by an axial shoulder arranged on the side opposite to the flange; the first annular shield being placed, at the same time, in axial contact with the flange portion and the axial shoulder.

In accordance with one aspect of the present disclosure, a roller bearing seal assembly is provided that includes a seal case and a rotor having a unitary, one-piece construction. The rotor is connected to the seal case and is rotatable relative to the seal case about an axis. The seal case and rotor include interfering portions that limit axial separation of the rotor and the seal case. In one embodiment, the rotor and seal case include at least one snap-fit connection that permits the rotor and seal case to be readily assembled. The at least one snap-fit connection includes the interfering portions which inhibit axial separation of the rotor and seal case after the rotor and seal case have been assembled.

A sealing apparatus main body includes a reinforcing ring and an elastic material portion which is attached to the reinforcing ring and formed of an elastic material. The elastic material portion has a side lip formed so as to contact a slinger from the inside, a radial lip formed so as to contact the slinger from an outer periphery side, and an outer peripheral annular projection being an annular projection which is arranged on an outer periphery side of the side lip and protrudes to the outside. The slinger has a fitting portion and a flange portion extending from an outer end portion of the fitting portion to the outer periphery side. The elastic material portion forms a labyrinth seal between the outer peripheral annular projection and the side lip between the elastic material portion and the flange portion of the slinger.

A sealing apparatus includes a sealing apparatus body that is to be attached to an outer ring of a hub bearing, and a slinger that is to be attached to a hub, in which the sealing apparatus body includes a reinforcing ring and an elastic body part. The elastic body part includes an outer periphery side labyrinth lip that is positioned on an outer periphery side of an outer periphery side end portion of the slinger and forms a gap between the hub and the outer periphery side labyrinth lip, an inner periphery side labyrinth lip, and a side lip. A distal end portion of the outer periphery side labyrinth lip is positioned on the outer side of the outer periphery side end portion of the slinger in a direction of an axis, and the outer periphery side labyrinth lip forms a groove portion in an annular shape centered about the axis and depressed toward the inner periphery side at the outer periphery side labyrinth lip on the outer periphery side.

[Problem] To provide a sealing device that has a high function of stopping the entry of foreign matter. [Solution] Provided is a sealing device disposed between a rotating inner member and a fixed outer member of a rolling bearing, said sealing device comprising: an annular rotating seal member fixed to the inner member; and an annular seal cover fixed to an end portion of the outer member. The seal cover comprises: a fixed portion that is disposed in an interval between the outer member and the inner member and fixed to the end portion of the outer member; and a protective portion that is disposed radially outward of the rotating seal member and stops foreign matter from advancing to the rotating seal member from the outside. The rotating seal member comprises: an attachment portion fixed to the inner member; and a seal lip and a dust lip that extend from the attachment portion toward the seal cover. The dust lip extends obliquely radially outward from the attachment portion toward the seal cover. [Selected Drawing] FIG. 2

A wheel bearing arrangement for a motor vehicle, including a wheel support and a wheel hub which is rotatably mounted on the wheel support by a wheel bearing in order to secure a wheel and to which a shaft is rotationally fixed, wherein a wheel bearing seal sealingly lies, on the one hand, against an inner ring of the wheel bearing, said inner ring sitting on the wheel hub, and, on the other hand, against an outer ring of the wheel bearing, said outer ring being secured to the wheel support. It is provided here that a wheel bearing pre-seal is rotationally fixed to the shaft adjacently to the wheel bearing and engages by a seal protrusion in a pre-seal receiving area formed in at least some sections between the outer ring and the wheel support.

A wheel hub bearing for motor vehicles including a rotatable hub provided with a flange for the engagement of the hub to a wheel of a vehicle and provided with a radially outer free portion and a bearing unit provided with a radially outer ring for the engagement of the wheel hub bearing to a knuckle of the vehicle and a radially inner rotatable ring angularly connected to the hub. Furthermore, the wheel hub bearing has a device for detecting a vehicle parameter and provided with an encoder and a sensor in communication with the encoder. The encoder is ridgidly coupled to the radially outer free portion of the flange to jointly rotate with the hub.