A wheel support bearing assembly, which enables an increase in the strength and the fatigue strength of its wheel mounting flange or vehicle body fitting flange against high stress and repeated stress and the suppression of the increase of the number of processes, includes an inner member and an outer member rotatable relative to each other through rolling elements. The flange is formed on the inner member or the outer member, for example, a hub. A component part having the flange is a hot-forged product of steel in which a matrix portion is formed as a standard structure and the non-standard structural portion is formed on the surface of the flange. The non-standard structure is formed of either of a fine ferrite/pearlite structure, an upper bainite structure, a lower bainite structure, and a tempered martensite structure, or mixture of two or more of these structures.

Bearing device for wheel

To provide a wheel support bearing assembly, in which the sufficient proof strength of an inner race during assemblage onto the vehicle body can be secured without its function being lowered, the wheel support bearing assembly includes an outer member, an inner member, and rows of rolling elements interposed therebetween. The inner member includes an hub axle having a flange and an inner race on an inner race mount, with raceways defined in the hub axle and the inner race. The inner race has a counterbore at its inboard end. The hub axle has a plastically deformed portion which engages an axially oriented surface of the counterbore when radially outwardly crimped and does not protrude outwardly beyond an inboard end face of the inner race. The difference P between the inner race mount and an outer peripheral face of the plastically deformed portion is 0.13 mm or more.

Wheel support bearing assembly

A rolling bearing device (1) having a hub shaft (2), a double-row hub bearing (4) provided on the outer periphery side of the hub shaft (2) and having outer-side first-row rolling bodies (19) and inner-side second-row rolling bodies (20), and a spindle bearing (S) interposed between an axle (5) and the hub shaft (2). The spindle bearing (S) is positioned, in the direction of the axis of the hub shaft, outside the area between points (K1, K2) of action of the first and the second rolling bodies (19, 20) of the hub bearing (4) to increase the rigidity of the entire rolling bearing device (1). Since the rigidity of the entire rolling bearing device is increased, a moment load acting on the hub shaft particularly is easily supported and sufficient strength of the hub shaft is achieved.

Rolling bearing device

A vehicle wheel bearing apparatus has an outer member, an inner member, and double row rolling elements freely rollably contained between the inner and outer raceway surfaces of the inner and outer members. A brake pilot portion extends from a base of a wheel hub mounting flange toward the outer side to guide an inner circumferential surface of a brake rotor. A wheel pilot portion extends from the brake pilot portion further toward the outer side to guide an inner circumferential surface of the wheel. The wheel pilot portion including a plurality of separated pilots separated along a circumferential direction. A chamfered portion is formed, by forging, on a forward end of each separated pilot in view of its lathe cutting direction. The chamfered portion has a predetermined inclined angle relative to an axial end surface of each separated pilot after lathe cutting.

Wheel bearing apparatus for a vehicle

Provided is a hub unit bearing wherein a cover can be firmly fitted with an outer ring member, and it is difficult for foreign matter to enter inside through a water drainage hole formed in the cover. The cover that covers the inside end section in the axial direction of the hub unit bearing includes a disk section, a small-diameter cylindrical section bent in the axial direction from the outer perimeter edge section of the disk section and a large-diameter cylindrical section. A cut and raised section that is cut and raised toward the inside in the radial direction is formed in the small-diameter cylindrical section, and a water drainage hole that passes through from inside to outside the cover is provided in the portion that is cut and separated from the small-diameter cylindrical section.

Hub unit bearing

Sealing device (1) for rolling contact bearings provided with a shield (2) which may be installed onto an outer race (11) of the bearing (12), and presenting a lateral cylindrical wall (21) which is suitable for being arranged in a radially intermediate position between an encoder (16) and a reading sensor (17) of the bearing (12), and a passing window (29) which is obtained through the lateral cylindrical wall (21) in order to permit the sensor (17) to face the encoder (16); a cover (40) made of plastic material being arranged in such a way as to close the said window (29), and being selectively mobile in order to effect variations in pressure between the inside and outside of the bearing (12) between two extreme operating positions in at least one of which the cover (40) is suitable for substantially sealing the said window (29)

Sealing device for rolling bearings

Sealing device (1) for a wheel hub unit (2) which is connected to a differential (3) of a vehicle, and which is provided with a contact rolling bearing (9), the sealing device (1) being mounted in order to protect the bearing (9) from a lubricating fluid which is used to lubricate the differential (3), and presenting a first shield (22) which is integral with an outer race (10) of the bearing (9), a second shield (23) which is arranged inside the first shield (22) and which is integral with an inner race (11) of the bearing (9) and which counter-faces the first shield (22) itself, and a dynamic sealing element (24) which is interposed between the first and the second shield (23); a first static sealing element (51) being associated with a terminal border (37) of the shrink-fit portion (33a), and being arranged inside an external relief (60) in order to create a static seal with a box (5) which extends from the differential (3) to the unit (2).

Sealing device for a wheel hub unit

Sealing device (1) for a wheel hub group (2) connected to the differential (3) of a vehicle, and provided with a rolling bearing (9), the sealing device (1) being mounted in such a way as to protect the bearing (9) from a lubricating fluid for the lubrication of the differential (3), and presenting a first shield (22) which is integral with an outer race (10) of the bearing (9), a second shield (23) which is arranged inside the first shield (22) and which is integral with an inner race (11) of the bearing (9) and which faces the first shield (22) itself, and a dynamic sealing element (24) which is interposed between the first and second shields (22,23); the second shield (23) having a cylindrical encoder (27) integral with a support portion (25), and the first shield (22) made of metallic material lined with rubber material, and having a loophole (38) which is suitable for being engaged by a reading sensor (39) for reading a signal generated by the encoder (27) itself.

Sealing device for a wheel hub group

In order to protect a junction between mechanical parts made from different metals from electrolytic corrosion, there is interposed between the parts a protective shield which is formed from sheet metal, generally steel, the surface of which is treated to render it electrically passive; more particularly, in the motor-vehicle field, the connection between the flange of a wheel bearing and the respective strut or between the flange and the end of a shock absorber or of a disc brake may be the seat of electrolytic corrosion; such corrosion is caused by electrovoltaic potentials generated in the zone of contact between different metals in the presence of moisture; the protective shield may also cover the side of the outer ring of the bearing and cooperate with the seal as an additional labyrinthine sealing element.

Protective element against electrolytic corrosion, particularly for the strut of a vehicle and its bearing

Device ( 1 ) for measuring the angular speed of rolling contact bearings ( 2 ) presenting a protective shield ( 5 ) which is mounted onto the rolling contact bearing ( 2 ), a phonic wheel ( 6 ) which is mounted under the protective shield ( 5 ), and a sensor ( 7 ), which is mounted onto a stud ( 8 ) which is outside the rolling contact bearing ( 2 ) and which is provided with an external frontal surface ( 11 ) which faces the phonic wheel ( 6 ); the protective shield ( 5 ) is defined by a rigid wall ( 18 ), which is mounted onto a fixed race of the rolling contact bearing ( 2 ), and which is provided with at least one passing housing ( 22 ) for housing the frontal surface ( 11 ) of the sensor ( 7 ) and for isolating the frontal surface ( 11 ) itself from the outside by means of a rubber membrane ( 23 ) which is suitable for remaining in direct contact with the frontal surface ( 11 ).

Device for measuring the angular speed of rolling contact bearings

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