Abstract: A wheel bearing apparatus is formed as a unit of a wheel hub and a double row taper roller bearing. An outer member is formed with double row tapered outer raceway surfaces, each opened axially outward, on its inner circumference. An inner member, including the wheel hub, has a wheel mounting flange integrally formed at one end of the wheel hub. A cylindrical portion axially extends from the wheel mounting flange. At least one inner ring is fit onto the cylindrical portion of the wheel hub via a predetermined interference. Each inner ring is formed with one of the tapered double row inner raceway surfaces on its outer circumference. The inner raceway surfaces are arranged opposite to one of the double row outer raceway surfaces. On its larger outer diameter side, the inner ring has a larger flange portion to guide the tapered rollers. Double row tapered rollers are rollably arranged between the outer and inner raceway surfaces, via cages.

Abstract: A vehicle wheel bearing apparatus has an outer member with double row outer raceway surfaces on its inner circumferential surface. An inner member includes a wheel hub and at least one inner ring. The wheel hub has a wheel mounting flange formed at one end. A cylindrical portion axially extends from the wheel mounting flange. The inner ring has at least one inner raceway surface arranged opposite to the plurality of outer raceway surfaces. The inner ring is press fit onto the cylindrical portion of the wheel hub. Double row rolling elements are freely rollably contained between the outer and inner raceway surfaces. An outer joint member forms a constant velocity universal joint. The outer joint member has a cup-shaped mouth portion. A shoulder portion forms the bottom of the mouth portion. A shaft portion axially extends from the shoulder portion. The shaft is axially separably and torque transmittably inserted into the wheel hub with the shoulder abutted against the caulked portion to transmit torque.

Abstract: A vehicle wheel bearing apparatus is formed as a unit and has a wheel hub with a wheel mounting flange at one end. A cylindrical portion extends from the wheel mounting flange, via a shoulder portion. A wheel bearing, formed by a double row rolling bearing, is press fit onto the cylindrical portion of the wheel hub. The wheel bearing has an outer member formed with double row outer raceway surfaces on its inner circumferential surface. A pair of inner rings, formed with inner raceway surfaces, is arranged opposite to the double row outer raceway surfaces. The rings are press fit onto the cylindrical portion of the wheel hub, via a predetermined interference. One ring abuts the shoulder portion. Double row rolling elements are freely rollably contained between the opposed inner and outer raceway surfaces, via cages. The inner rings are axially immovably secured by a caulked portion. The caulked portion is formed by plastically radially outwardly deforming the end portion of the cylindrical portion.

Abstract: A vehicle wheel bearing apparatus has an outer member formed with a body mounting flange on its outer circumferential surface. The body mounting flange is to be mounted on a knuckle of the vehicle. The outer member inner circumference includes double row outer raceway surfaces. An inner member includes a wheel hub with a wheel mounting flange formed on one end. A cylindrical portion extends from the wheel mounting flange. At least one inner ring is press-fit onto the cylindrical portion of the wheel hub. The inner ring outer circumference is formed with an inner raceway surface arranged opposite to the double row outer raceway surfaces. Double row rolling elements are freely rollably contained between the outer raceway surfaces and inner raceway surfaces of the outer member and the inner members. Seals are mounted within annular openings formed between the outer member and the inner member. The inner ring is axially secured relative to the wheel hub by a caulked portion.

Abstract: A vehicle wheel rolling bearing has a sealing device integrated with a magnetic encoder. A semi-float type bearing apparatus has said rolling bearing which can protect a magnetic encoder and improve the sensing ability of the detecting sensor. The rolling bearing has an inner member with a wheel hub having a wheel mounting flange and an inner ring formed with inner raceway surfaces. An outer member is formed with double row outer raceway surfaces opposite the inner raceway surfaces. Double row rolling elements are between the raceway surfaces. Sealing devices include an inboard sealing device with an annular seal fitted on the outer member. A pulsar ring is mounted on the inner member and has an encoder mounted on a cylindrical holding portion. The encoder is arranged opposite to the annular seal. The encoder includes magnetic poles formed by magnetic powder with alternating polarity along its circumferential direction.

Abstract: A rolling bearing assembly equipped with an electric power generator, having: inner and outer members rotatable relative to each other through rolling elements; an electric power generator including a multi-pole magnet assembly mounted on one of the inner and outer members and having a plurality of alternating magnetic poles arranged in a circumferential direction, and a magnetic ring assembly mounted on the remaining one of the inner and outer members and accommodating a coil and confronting the multi-pole magnet assembly; the magnetic ring assembly including a stepped portion of a generally U-shaped section having a peripheral surface portion and an end face portion, said stepped portion being defined on an outer periphery or an inner periphery of one end of the magnetic ring assembly, the magnetic ring assembly being mounted on the remaining one of the inner and outer members with the peripheral surface portion of the stepped portion press-fitted directly onto a peripheral surface of the remaining one of t

Abstract: To avoid an adherence of metallic particles from a knuckle to a magnetic encoder during coupling of a wheel support bearing assembly to the knuckle and/or transportation of the wheel support bearing assembly, a protective cap (18) is provided. The wheel support bearing assembly with which the protective cap (18) can be used is of a type including a magnetic encoder (10) provided in a sealing unit (5). This protective cap (18) includes an annular cover-up portion (18a) for enclosing an annular surface of the magnetic encoder (10) that is exposed bare to the outside, and an engagement wall (18b). The engagement wall (18b) is integral with the annular cover-up portion (18a) and of a cylindrical shape capable of being removably engaged in the wheel support bearing assembly.

Abstract: A wheel bearing apparatus has an outer member formed with double row outer raceway surfaces on its inner circumferential surface. An inner member includes a wheel hub integrally formed with a wheel mounting flange at one end and a cylindrical portion axially extending from the wheel mounting flange. At least one inner ring is fit onto the cylindrical portion of the wheel hub. The inner ring is formed with a double row inner raceway surfaces on its outer circumferential surface. The double row inner raceway surfaces are arranged opposite to the double row outer raceway surfaces. Double row rolling elements are rollably arranged between the outer and inner raceway surfaces, via cages. Seals are mounted in openings or annular spaces formed between the outer member and the inner member. At least an inner-side seal of the seals has a slinger and an annular sealing plate. Each has a substantially “L” shaped cross-section arranged opposite to one another.

Abstract: A wheel bearing apparatus has an outer member formed with double row outer raceway surfaces on its inner circumferential surface. An inner member includes a wheel hub with a wheel mounting flange integrally formed at one end and a cylindrical portion axially extending from the wheel mounting flange. At least one inner ring is fit onto the cylindrical portion of the wheel hub. The inner ring is formed with double row inner raceway surfaces on its outer circumferential surface. The double row inner raceway surfaces are arranged opposite to the double row outer raceway surfaces. Double row rolling elements are rollably arranged between the outer and inner raceway surfaces, via cages. A seal is mounted on one end of the outer member. The seal has integrally formed side lips adapted to be in sliding contact with the wheel hub. The base of the wheel mounting flange is formed to have a curved surface, in cross-section, of a circular arc.

Abstract: A wheel support bearing assembly includes inner and outer members (1 and 2) and at least one row of rolling elements (3) operatively interposed between the inner and outer members (1 and 2) and an annular sealing device (5) sealing an open end of an annular space defined between the inner and outer members (1 and 2). The sealing device (5) includes first and second annular sealing plates (11 and 12) fitted to different members out of the inner and outer members (1 and 2). Each of the first and second sealing plates (11 and 12) includes a generally cylindrical wall (11a or 12a) and a radial wall (11b or 12b) assembled together to represent a generally L-shaped section. The first sealing plate (11) is fitted to one of the inner and outer members (1 and 2) that serves as a rotating member. An elastic member (14) mixed with a powdered magnetic material is bonded by vulcanization to the radial wall (11b) of the first sealing plate (11).

Abstract: To provide a rotation detecting device with a function of transmitting a rotational speed detection signal wireless and enable the rotation detecting device to be assembled compact in size without requiring any anti-rusting treatment to a multi-pole magnet assembly and a magnetic ring assembly, the rotation detecting device includes an electric power generator (11) for generating an electric power by a relative rotation between a non-rotatable member (1) and a rotatable member (7). The electric power generator (11) includes a multi-pole magnet assembly (13) and a magnetic ring assembly (12). A wireless transmission device (14) for transmitting the rotational speed detection signal outputted by the electric power generator (11) is employed.

Abstract: A rolling bearing assembly equipped with an electric power generator, having: inner and outer members rotatable relative to each other through rolling elements; an electric power generator including a multi-pole magnet assembly mounted on one of the inner and outer members and having a plurality of alternating magnetic poles arranged in a circumferential direction, and a magnetic ring assembly mounted on the remaining one of the inner and outer members and accommodating a coil and confronting the multi-pole magnet assembly; the magnetic ring assembly including a stepped portion of a generally U-shaped section having a peripheral surface portion and an end face portion, said stepped portion being defined on an outer periphery or an inner periphery of one end of the magnetic ring assembly, the magnetic ring assembly being mounted on the remaining one of the inner and outer members with the peripheral surface portion of the stepped portion press-fitted directly onto a peripheral surface of the remaining one of t

Abstract: A rolling bearing assembly equipped with an electric power generator, the assembly having: first and second members rotatable relative to each other through rolling elements; an electric power generator capable of generating an electric power by a relative rotation between the first and second members; and an electric circuit disposed within a yoke forming a part of the electric power generator and utilizing the electric power generated by the electric power generator.

Abstract: A wheel bearing device, in which a swaged portion of a wheel hub abuts against a shoulder portion of a joint outer ring, is provided to positively prevent a stick slip noise from being generated at the time of the vehicle being pulled away from a parked position. The wheel bearing device includes an outer ring having double rows of race surfaces formed on its inner circumference; a wheel hub having one of the double rows of race surfaces formed on its outer circumference; an inner ring press-fitted over a reduced diameter step portion of the wheel hub and having the other of the race surfaces formed on its outer circumference; and double rows of rollers interposed on the respective race surfaces between the outer ring and the wheel hub and between the outer ring and the inner ring.

Abstract: A vehicle wheel bearing apparatus which limits hoop stress generated in the inner ring during caulking, to below a predetermined level, can improve durability and reliability of the inner ring. Radial expansion of the outer circumferential surface of the inner ring, before and after said plastic deformation, is measured so that the amount of radial expansion of the inner ring is controlled based on a predetermined relationship between the hoop stress and the amount of radial expansion of the inner ring. The hoop stress in the inner member is limited below a predetermined level. Thus, it is possible to easily and exactly control the hoop stress in the inner ring caulked onto the hub. This prevents the generation of cracking or delayed fracture of the inner ring, to provide a bearing apparatus with an inner ring with superior durability and reliability.

Abstract: A wheel bearing includes a sealing device 5 positioned between inner and outer members 1 and 2. This sealing device 5 includes an elastic member 14, which eventually forms an encoder grid and is provided on a first annular sealing plate 11. A second annular sealing plate 12 is provided with sealing lips 16a to 16c. An engagement 18 between a cylindrical wall 11a of the first annular sealing plate 11 and the inner member 1 is provided with an elastic member 20 made of a material dissimilar to that for the elastic material 14. This elastic member 20 may be a rubber coated layer, resin paint layer, a thin film of adhesive material or a ring-shaped rubber member. Thereby, any possible ingress of water across an engagement surface of the annular sealing plate is prevented, accompanied by increase of the lifetime of the bearing, with no problem associated with separation and displacement of the annular sealing plates. The magnetic flux density can also be easily secured.

Abstract: A wheel support bearing assembly includes inner and outer members (1 and 2) and at least one row of rolling elements (3) operatively interposed between the inner and outer members (1 and 2) and an annular sealing device (5) sealing an open end of an annular space defined between the inner and outer members (1 and 2). The sealing device (5) includes first and second annular sealing plates (11 and 12) fitted to different members out of the inner and outer members (1 and 2). Each of the first and second sealing plates (11 and 12) includes a generally cylindrical wall (11a or 12a) and a radial wall (11b or 12b) assembled together to represent a generally L-shaped section. The first sealing plate (11) is fitted to one of the inner and outer members (1 and 2) that serves as a rotating member. An elastic member (14) mixed with a powdered magnetic material is bonded by vulcanization to the radial wall (11b) of the first sealing plate (11).

Abstract: A vehicle wheel bearing apparatus for supporting a driven wheel of a vehicle has an outer member formed with double row outer raceway surfaces on its inner peripheral surface. An inner member includes a wheel hub with an integrally formed wheel mounting flange at one end of the inner member. A cylindrical portion axially extends from the wheel mounting flange. At least one inner ring, formed with at least one of double row inner raceway surfaces, opposes the double row outer raceway surfaces. The inner ring is adapted to be press-fit onto the cylindrical portion of the wheel hub. Double row rolling elements are freely rollably contained between the outer and inner raceway surfaces, respectively, of the outer and inner members. The inner ring is axially immovably secured relative to the wheel hub by a caulked portion. The caulked portion is formed by plastically deforming the end of the axially extending cylindrical portion radially outward.

Abstract: A wheel support bearing assembly includes inner and outer members (1 and 2) and at least one row of rolling elements (3) operatively interposed between the inner and outer members (1 and 2) and an annular sealing device (5) sealing an open end of an annular space defined between the inner and outer members (1 and 2). The sealing device (5) includes first and second annular sealing plates (11 and 12) fitted to different members out of the inner and outer members (1 and 2). Each of the first and second sealing plates (11 and 12) includes a generally cylindrical wall (11a or 12a) and a radial wall (11b or 12b) assembled together to represent a generally L-shaped section. The first sealing plate (11) is fitted to one of the inner and outer members (1 and 2) that serves as a rotating member. An elastic member (14) mixed with a powdered magnetic material is bonded by vulcanization to the radial wall (11b) of the first sealing plate (11).

Abstract: To provide a rotation detecting device with a function of transmitting a rotational speed detection signal wireless and enable the rotation detecting device to be assembled compact in size without requiring any anti-rusting treatment to a multi-pole magnet assembly and a magnetic ring assembly, the rotation detecting device includes an electric power generator (11) for generating an electric power by a relative rotation between a non-rotatable member (1) and a rotatable member (7). The electric power generator (11) includes a multi-pole magnet assembly (13) and a magnetic ring assembly (12). A wireless transmission device (14) for transmitting the rotational speed detection signal outputted by the electric power generator (11) is employed.