A sealing device comprises a first insert body and a second insert body. The first insert body has an annular first frame, and a first sealing part coupled to the first frame. The second insert body has an annular second frame having a diameter smaller than that of the first frame, and a second sealing part coupled to the second frame. The second insert body rotates relative to the first insert body. The first insert body and the second insert body are arranged such that a gap is formed between the first sealing part and the second sealing part. The second sealing part has a first surface facing the first sealing part and spaced apart from the second frame in a first axial direction; and a first baffle protruding toward the first sealing part from the end of the first surface in the outer radial direction thereof.

A wheel bearing apparatus has a magnetic encoder 14 mounted on an inner ring 5 opposing the rotational speed sensor 16, via the cap 10 and an air gap. The cap 10 has a cylindrical fitting part 10a press-fit into an inner circumference of an end of the outer member 2. A shielding part 10c extends radially inward from the fitting part 10a and has an annular disc shape. A detection part 16a of the rotational speed sensor 16 is arranged close to or in contact with a side surface of the shielding part 10c. The cap 10 is formed of austenitic stainless steel sheet based on SUS 304. The carbon (C) content is reduced and the nickel (Ni) content is increased. A difference of magnetic flux density between a martensitic transformation part and non-martensite part is 1.4 mT or less.

Sealing device for a wheel hub unit is disclosed herein, wherein the sealing device being able, during use, to form a static seal for protecting the wheel hub unit from any environmental pollutant and being provided with a screen, which is engaged with a collar of the wheel hub unit and has a bottom wall, a cylindrical side wall integral with and more or less perpendicular to the bottom wall. The sealing device is designed and structured to protect the wheel hub unit from any environmental contaminant that the wheel hub unit may be exposed to during usage.

A wheelend assembly seal between the hub of a wheelend and a spindle shaft is provided. The wheelend assembly seal is a seal device having at least a static seal structure, a wear ring, and a dynamic seal structure. The dynamic seal structure comprises a resilient member that is biased such that in an uninstalled state, the resilient member diverges from an axially extending portion of the dynamic seal structure. When installed, the resilient member is compressed to be approximately parallel the axially extending portion and forms a seal between the surface of the resilient member and the outer surface of the spindle shaft.

A bearing device for vehicle wheel includes a sealing ring (71) that includes: a core bar (72) and sealing rubber (73). The sealing rubber (73) includes: a first sealing lip (73b) that is formed to the radial-direction outside of the fitting part (72a) and has a tip end part that is in sliding contact with a sealing plane part (3h); and a second sealing lip (73c) that is formed to the radial-direction inside of the fitting part (72a) and has a tip end part that is in sliding contact with the sealing plane part (3h). A flat surface (73e) that can be contacted by a press-fitting tool (P) and by the tip end part of the fitting part (72a) of another bearing device for vehicle wheel is formed between the first sealing lip (73b) and the second sealing lip (73c).

A drive device for driving and rotating a wheel includes an axle shaft, a hub to which rotation of the axle shaft is conveyed, a plurality of fasteners for securing the wheel to the hub, a wet brake, a housing, an oil seal, and a cover. The wet brake is configured to restrain the rotation of the axle shaft. The housing accommodates the axle shaft and the wet brake. The oil seal is disposed between the housing and a part of the hub that is disposed inward of the fasteners in a radial direction of the hub. The cover has an annular shape. The cover is disposed in a space formed between the hub and the housing, and is secured to the housing. The cover is configured to cover the plurality of fasteners.

There is provided a rotary seal having uneven surfaces formed on sliding contact surfaces of a slinger with which seal lip portions of a seal member come in contact, in which wear of the seal lip portions is reduced, resulting in increased reliability. The rotary seal 1 includes: a core metal 3; the seal member 4 having a base portion 4A joined to the core metal 3 and the seal lip portions 4B, 4C, and 4D; and the slinger 2 having the sliding contact surfaces A and B with which the seal lip portions 4B, 4C, and 4D come in contact, in which each of the sliding contact surfaces A and B is in such a surface condition that an arithmetic average roughness Ra satisfies 0.3 mRa1.0 m, a skewness of roughness curve Rsk satisfies Rsk1, and an average length of roughness curve element RSm satisfies 100 mRSm, Ra, Rsk, and RSm defined by JIS B 0601:2013.

In order to provide solutions for soiling problems and corrosion problems in the area between a pole ring (41) and the hub interior, arranged behind it, of a wheel hub assembly having a wheel hub (1) which ends inside the vehicle in a hub section (50) whose internal circumference (15) defines an opening (55) for the central passage of the stub axle (6) and on which a fastening device (42) of a pole ring (41) of an ABS sensor is mounted, wherein a pulse generator section (43) which is embodied in one piece with the fastening section (42) is a component of the pole ring (41), which pulse generator section (43) extends from the fastening section (42) to the wheel hub axis (A) and is provided with openings (44, 44L) distributed uniformly in the circumferential direction; in a first embodiment the pole ring (41) extends with its pulse generator section (43) towards the wheel hub axis (A) to such an extent that the opening (55) between the wheel hub (1) and stub axle (6) is for the most part covered towards the interior of the hub. In a second embodiment, at least some of the openings or slots have an extent (RL) towards the outside which is greater than the extent (R) which is necessary for sensing. Furthermore, it is proposed with respect to the pole ring (41) that some of the openings (44L) or slots have an extent (RL) towards the outside which is greater than the extent (R) of other openings (44) or slots.

A wheel hub arrangement for a motor vehicle, provided with a hub which is rotatably mounted by a wheel bearing for the attachment of a wheel. A shaft, which is formed separately from the wheel hub, is non-rotatably coupled to the wheel hub. At the same time a first receiving section of a sealing receptacle is formed in the wheel hub in which is arranged a shaft, in which a sealing device is arranged which engages a second receiving section of the sealing receptacle formed in the axial direction with respect to an axis of rotation of the wheel hub, adjacent to the first receiving section.

Low-friction sealing assembly for a vehicle wheel-hub unit inserted inside an annular interspace defined between a flanged rotating element and a stationary element, coaxial with each other, of the wheel-hub unit to protect at least one ring of revolving bodies arranged between the stationary element and the rotating element, and having a first annular screen and a second annular screen during use integral with the rotating element and with the stationary element; and an annular seal having lips that extend axially and radially projecting from the first screen towards the second screen inside an annular chamber defined by the first and second screens; the sealing assembly being a multi-stage sealing assembly provided with a first inner collecting stage designed to collect and expel some of the contaminants.