Abstract: A vehicle wheel bearing apparatus with a back-to-back double row tapered roller bearing has an outer member integrally with a body mounting flange and double row outer raceway surfaces tapered open respectively axially inward and outward. An inner member include a wheel hub and an inner ring or an outer joint member of a constant velocity universal joint. The wheel hub has a wheel mounting flange and one inner raceway surface arranged oppositely to one of the double row outer raceway surfaces and a cylindrical portion. The inner ring or the outer joint member of a constant velocity universal joint are press fit onto the cylindrical portion and include the other inner raceway surface arranged opposite to the other raceway surface of the double row outer raceway surfaces. Double row tapered rollers are freely rollably held between the outer and inner raceway surfaces by cages. Seals are arranged in annular openings formed by the outer and inner members. The cages are formed of synthetic resin.

Abstract: A bearing apparatus for a wheel comprising a rolling bearing for rotatably supporting a wheel relative to a body of vehicle having double row rolling elements (20) arranged between an inner member 1 and an outer member (10); a wheel mounting flange (5) for fastening the wheel on a hub wheel (2); and an annular groove (7) formed on the wheel mounting flange (5) and having a predetermined width including hub bolts (6); characterized in that one side of the wheel mounting flange (5) at a region other than the annular groove (7) is formed as a cut-finished surface cut after the press fit of the hub bolts (6).

Abstract: A wheel bearing apparatus incorporating a wheel speed detecting apparatus has an outer member, an inner member, double row rolling elements, a sensor holder, and a pulser ring. The sensor holder cover has a cylindrical fitting portion press-fit onto the inner side end portion of the outer member. A flange portion extends radially inward from the fitting portion. The flange portion is in close contact with the end face of the outer member. A bottom portion extends further radially inward from the flange portion. The holding portion is integrally joined to the bottom portion. The flange portion is formed with a flat surface so that it forms an abutting width larger than 5 mm or more, against the end face of the outer member, or larger than 50% or more, relative to the flat width of the end face of the outer member.

Abstract: A wheel support bearing assembly includes an outer member inserted in a knuckle, an inner member made up of a hub axle, double rows of rolling elements, and a cover closing an opening of one end of the outer member. The cover includes a sensor connector and a sensor cap. A pulsar ring is mounted on the inner race and a rotation sensor is opposed to the pulsar ring and embedded in the sensor connector. The cover extends over an outer surface of the sensor connector. The cover has a cylindrical portion mounted in an inner peripheral surface of one end of the outer member, which end forms a pilot portion for the knuckle. The cylindrical portion of the cover has an outer periphery provided with an annular elastic member held in contact with an inner peripheral surface of the knuckle.

Abstract: A wheel bearing apparatus incorporating a wheel speed detecting apparatus has an outer member and an inner member with a wheel hub and at least one inner ring. Double row rolling elements are contained between the inner and outer raceway surfaces of the inner and outer members. A sensor holder, with a wheel speed sensor to detect the wheel speed, is mounted on the end of the outer member. An encoder is mounted on the inner ring and arranged opposite to the wheel speed sensor, via a predetermined air gap. The sensor holder has an annular ring shaped cover and a holding portion of synthetic resin. The wheel speed sensor is embedded in the holding portion. The cover is press-formed of an anti-corrosion steel sheet. The cover has a cylindrical fitting portion fit onto the end of the outer member. A flange portion extends from the fitting portion and is in close contact with the end face of the outer member. A bottom portion further extends radially inward from the flange portion.

Abstract: A vehicle wheel bearing apparatus has a substantially cylindrical outer ring formed with double row outer raceway surfaces on its inner circumference and with press fitting surfaces on its outer circumferences of its cylindrical portions. A pair of inner rings is formed with inner raceway surfaces on their outer circumferences. The inner rings cylindrical portions have fitting surfaces on their inner circumferences. The fitting surfaces fit onto a cylindrical portion of a wheel hub. The inner rings are adapted to be arranged so that end faces of the cylindrical portions abut each other. Double row rolling elements are freely rollably arranged between outer and inner raceway surfaces. At least the outer ring of the outer and inner is formed by pressing or rolling from a plate member or a pipe member. The outer ring and the inner rings have cylindrical portions axially extending, respectively, from the outer raceway surfaces and the inner raceway surfaces.

Abstract: It is an object of the present invention to reduce cost of a hub wheel in a bearing device for wheel for a drive wheel or a driven wheel. A cylindrical pilot portion P to be fitted to an inner periphery of a wheel 80 is formed at an inner diameter part of a brake rotor 70. A shape of the hub wheel, in particular, the shape thereof on an outboard side is thereby simplified, and thus the hub wheel can be fabricated at low cost by cold forging or the like. An outer joint member 31 of an outboard side constant velocity universal joint 30 and a hub wheel 10 are connected with each other by way of a nut member 90.

Abstract: A vehicle wheel bearing apparatus with a back-to-back double row tapered roller bearing has an outer member integrally with a body mounting flange and double row outer raceway surfaces tapered open respectively axially inward and outward. An inner member include a wheel hub and an inner ring or an outer joint member of a constant velocity universal joint. The wheel hub has a wheel mounting flange and one inner raceway surface arranged oppositely to one of the double row outer raceway surfaces and a cylindrical portion. The inner ring or the outer joint member of a constant velocity universal joint are press fit onto the cylindrical portion and include the other inner raceway surface arranged opposite to the other raceway surface of the double row outer raceway surfaces. Double row tapered rollers are freely rollably held between the outer and inner raceway surfaces by cages. Seals are arranged in annular openings formed by the outer and inner members. The cages are formed of synthetic resin.

Abstract: To provide a wheel support bearing assembly in which the frictional resistance can be effectively reduced while effects of minimizing leakage of the filled lubricant and ingress of dust and muddy water from outside of the bearing assembly are secured, the wheel support bearing assembly includes an outer member 1, an inner member 2 positioned inside the outer member 1 with an annular working space defined between it and the outer member 1, and rows of rolling elements 3 accommodated within the annular working space and rollingly received in part within outer raceways 4 in the outer member 1 and in part within inner raceways 5 in the inner member 2. Opposite open ends of the annular working space are sealed by respective sealing members 7 and 8 which are secured to one of the outer and inner members 1 and 2.

Abstract: To provide a wheel support bearing assembly in which the frictional resistance can be effectively reduced while effects of minimizing leakage of the filled lubricant and ingress of dust and muddy water from outside of the bearing assembly are secured, the wheel support bearing assembly includes an outer member 1, an inner member 2 positioned inside the outer member 1 with an annular working space defined between it and the outer member 1, and rows of rolling elements 3 accommodated within the annular working space and rollingly received in part within outer raceways 4 in the outer member 1 and in part within inner raceways 5 in the inner member 2. Opposite open ends of the annular working space are sealed by respective sealing members 7 and 8 which are secured to one of the outer and inner members 1 and 2.

Abstract: A bearing assembly with a rotation sensor, comprising an outer member (1), an inner member (2), a plurality of rolling elements (3) interposed between the opposed raceway surfaces, and a rotation sensor (4). The rotation sensor (4) includes an annular magnetic encoder (15) and an annular magnetic sensor (16) fitted to the outer member (1) through a sensor cap (12) and a sensor connector (22). The sensor cap (12) is formed in a cylindrical shape having a bottom shape, and has an opening end fitted to an inner periphery or outer periphery of the outer member (1) The sensor connector (22) is formed integrally with the magnetic sensor (16), formed in a polygonal shape on its outer periphery, and fitted to the inner periphery of the sensor cap (12) by a press-fitting.

Abstract: An outer member 10 and an inner member 20 constituting a wheel bearing device are assembled and the brake rotor 40 is fixed to the hub ring 20A of the inner member. In this state, the pad slide surfaces 40a and 40b of the brake rotor 40 are lathed with the reference provided by a wheel pilot end surface 23. Alternatively, the wheel pilot end surface 23 of the hub ring 20A by chucking the knuckle pilot 16 of the outer member 10 with the wheel bearing device put in its assembled state, and the pad slide surfaces 40a and 40b of the brake rotor 40 are lathed with the reference provided by the wheel pilot end surface 23.

Abstract: A reliable brake rotor and wheel bearing assembly are proposed which make unnecessary adjustment of runout of brake rotor at the customer's factory. For runout of each of the mounting surface and back of the brake rotor itself, and runout of the side of the wheel mounting flange of the inner member to which is mounted the brake rotor, the maximum difference between the peaks of crests and troughs in each period of surface runout is restricted within a standard value, and the brake rotor is mounted to the wheel mounting flange, thereby eliminating the necessity of mounting of the brake rotor and adjustment of runout after mounting at the customer's factory to provide a reliable automotive wheel bearing assembly.

Abstract: To provide a wheel support bearing assembly in which the frictional resistance can be effectively reduced while effects of minimizing leakage of the filled lubricant and ingress of dust and muddy water from outside of the bearing assembly are secured, the wheel support bearing assembly includes an outer member 1, an inner member 2 positioned inside the outer member 1 with an annular working space defined between it and the outer member 1, and rows of rolling elements 3 accommodated within the annular working space and rollingly received in part within outer raceways 4 in the outer member 1 and in part within inner raceways 5 in the inner member 2. Opposite open ends of the annular working space are sealed by respective sealing members 7 and 8 which are secured to one of the outer and inner members 1 and 2.

Abstract: A reliable brake rotor and wheel bearing assembly are proposed which make unnecessary adjustment of runout of brake rotor at the customer's factory. For runout of each of the mounting surface and back of the brake rotor itself, and runout of the side of the wheel mounting flange of the inner member to which is mounted the brake rotor, the maximum difference between the peaks of crests and troughs in each period of surface runout is restricted within a standard value, and the brake rotor is mounted to the wheel mounting flange, thereby eliminating the necessity of mounting of the brake rotor and adjustment of runout after mounting at the customer's factory to provide a reliable automotive wheel bearing assembly.

Abstract: A reliable brake rotor and wheel bearing assembly are proposed which make unnecessary adjustment of runout of brake rotor at the customer's factory. For runout of each of the mounting surface and back of the brake rotor itself, and runout of the side of the wheel mounting flange of the inner member to which is mounted the brake rotor, the maximum difference between the peaks of crests and troughs in each period of surface runout is restricted within a standard value, and the brake rotor is mounted to the wheel mounting flange, thereby eliminating the necessity of mounting of the brake rotor and adjustment of runout after mounting at the customer's factory to provide a reliable automotive wheel bearing assembly.

Abstract: A bearing apparatus for a wheel comprising a rolling bearing for rotatably supporting a wheel relative to a body of vehicle having double row rolling elements (20) arranged between an inner member 1 and an outer member (10); a wheel mounting flange (5) for fastening the wheel on a hub wheel (2); and an annular groove (7) formed on the wheel mounting flange (5) and having a predetermined width including hub bolts (6); characterized in that one side of the wheel mounting flange (5) at a region other than the annular groove (7) is formed as a cut-finished surface cut after the press fit of the hub bolts (6).

Abstract: In the capillary tube 22, the cross section of the outer surface is substantially square, and the cross section of the insertion hole 23 is substantially square. Sides La, Lb of the outer surface have high dimensional accuracy and the insertion hole 23 is made to allow two optical fibers 5, 6 to be inserted while adjoining each other and arranged in order therein. The phases of the outer surface and the insertion hole 23 are relatively offset with each other, so that angles &thgr;a, &thgr;b which the sides 23a, 23b of the insertion hole 23 form with flat surfaces 22a, 22b of the outer surface are acute angles of substantially 45°±0.5°. Consequently, the flat surface 22a becomes substantially parallel to the center line M that connects the centers of the cores 5a, 6a of the two optical fibers 5, 6 inserted in the insertion hole 23, and the flat surface 22b becomes substantially perpendicular to the center line M.