An inner shaft provided in a vehicular bearing device includes a shaft-shaped body portion and a flange portion. The flange portion includes: a flange base portion that is continuous with the body portion and that has a circular cross section; a plurality of first thick portions each provided with a bolt hole, the first thick portions being provided radially outward of the flange base portion at equal intervals in a circumferential direction; and a thin portion that is provided between the first thick portions and that is thinner than the first thick portions. The flange base portion includes: a second thick portion that is positioned radially inward of the first thick portion and that is thicker than the first thick portion; and a small-diameter portion that is positioned radially inward of the thick portion and that has a smaller diameter than that of the second thick portion.

This bearing device (1) for vehicle wheels comprises: an inner undercut part (8) provided in a portion at which an inner rolling surface (3d) formed on the inner side of an inner member (3) and an inner flange surface (3m) of the inner rolling surface (3d) intersect; an outer undercut part (9) provided in a portion at which an inner rolling surface (3c) formed on the outer side of the inner member (3) and an outer flange surface (3n) of the inner rolling surface (3c) intersect; and a vehicle wheel installation flange (3e) provided at a portion adjacent to the inner rolling surface (3c) formed on the outer side of the inner member (3), wherein, when the radius of curvature of the inner undercut part (8) is Ri, and the radius of curvature of the outer undercut part (9) is Ro, the relationship of Ri<Ro is satisfied.

Wheel hub assembly for motor vehicles, the group having a radially outer ring with at least one raceway, at least one radially inner ring with a related raceway and at least one ring of rolling bodies interposed between the radially outer ring and the radially inner ring, for sliding inside the raceways, at least one raceway being provided with superficial micropores having a depth (H) between 0.05 m and 1.5 m and defining respective micro-tanks for containing a lubricating grease.

A wheel bearing unit for a motor vehicle, comprising a wheel hub, a wheel bearing housing and a rolling bearing by which the wheel hub is mounted rotatably in relation to the wheel bearing housing. The rolling bearing has at least one row of rolling elements which are guided on the wheel hub side in a bearing inner ring which is designed as a separate component in relation to the wheel hub and which is fixedly connected to the wheel hub. The wheel hub has a through opening with an inner toothing, via which through opening the wheel hub can be connected in a non-rotational manner to a drive journal which is provided with an external toothing.

A hub unit bearing includes a stationary side raceway ring, a rotating side raceway ring including a rotating side flange for fixing a vehicle wheel, and rolling elements rollably provided therebetween. The rotating side flange includes thin portions and thick portions arranged alternately in a circumferential direction. A hub bolt is serration-fitted to a bolt hole formed in each of the thick portions. An outer peripheral surface of the rotating side flange includes a large-diameter portion which has a larger radial thickness dimension with the bolt hole, a small-diameter portion which has a smaller radial thickness dimension with the bolt hole than the large-diameter portion, and a step portion which connects the large-diameter portion to the small-diameter portion. A serration-fitted portion does not radially overlap with the large-diameter portion.

A wheel bearing apparatus has a seal (8) with a metal core (15) and a sealing member (6). The sealing member (6) has a first side lip (16a), a second side lip (16b) and a third side lip (19c). The first side lip (16a) opposes a metal annulus (17) via an axial gap. The second side lip (16b) is in sliding contact with a base (18), via an axial interference. The third side lip (19a) covers the outer surface of the metal core (15). The tip end of the third side lip (19a) is formed with a vertically flat surface opposing the inner-side surface (4b) of the wheel mounting flange (4, 28), via an axial gap (S1), to form a first labyrinth seal (20). The outer edge of the metal annulus (17) opposes the sealing member (6), via an axial gap, to form a second labyrinth seal (25).

A constant velocity joint assembly integrated with a wheel hub device may include an internal race coupled to an end portion of a driveshaft, a plurality of joint balls held in the internal race, and a hub housing accommodating and coupling the internal race holding the joint balls therein, with a bearing coupled to an external circumferential surface thereof, the hub housing provided as an external race of a constant velocity joint and the wheel hub device.

A method for manufacturing a hub unit includes: preparing a hub unit intermediate including an inner shaft, an inner ring fixed to an axial end of the inner shaft, and an outer ring rotatably arranged with respect to the inner shaft and the inner ring; preparing a magnetic seal member including a seal member and an annular magnetic member having no magnetic pole; and arranging the magnetic seal member between the inner ring and the outer ring of the hub unit intermediate. The method further includes: forming splines extending along the axial direction by cutting the inner circumferential surface of the inner shaft of the hub unit intermediate in which the magnetic seal member has been arranged; and forming magnetic poles in a circumferential direction of the magnetic member of the hub unit intermediate in which the plurality of splines have been formed.

The invention refers to the internal connection of a rear bicycle wheel hub (1) comprising a cylindrical body (2) that surrounds an axle (3), where a proximal end (2b) of the body (2) is attached to a freehub body (4) that surrounds a freewheel system (6). A connecting mechanism (5) between the body (2) and the freewheel system (6) of the freehub body (4) is characterized in that it comprises a connecting crown (7) coupled to an inner surface (2c) of the body (2) that connects with a ring (6a) in the freewheel system (6) and an elastic ring (8) seated in a circular recess (9) on a lateral surface (7c) of the connecting crown (7) so that it can expand towards the inner surface (2c) of the body (2) and fix the connecting crown (7) inside the body (2).

A flanged wheel hub for wheel hub bearings, the wheel hub having a flange provided with a plurality of threaded through holes and, for each threaded through hole, a respective radial arm, which has a respective axial thickness (SAB) to act as a strengthening element for the flange, at least at the position of the threaded through holes, the wheel hub being produced by forging with the flange and the arms made in one piece, and also having, for each threaded through hole, an annular boss, which is also forged in one piece with the wheel hub and is arranged around, and penetrated by, the corresponding threaded through hole for the purpose of increasing the mechanical strength characteristics of the wheel hub.