A bearing device for a vehicle wheel (1) includes: an outer ring (2), serving as an outer member; an inner member in which the inner member including a hub ring (3) that has an integral wheel mounting flange (3B) to which a wheel is mounted, and at least one inner ring (4) that is press-fitted to a small-diameter step part (3A) of the hub ring; ball rows (5) that are accommodated in a freely rolling manner; and a bottomed-tube-shaped cover (11) fitted to an inner-side opening (2B) of the outer member. In order to retain grease enclosed between the outer member and the inner member near the ball rows, an outside damming member (11D), which is formed of a ring-shaped elastic body extending radially inward, is provided at a side (11A) of the cover.

An axle of railway wheel sets and a corresponding method for the ultrasound inspection are described. A blind hole, coaxial to the axle and sized to accommodate an ultrasonic probe, is obtained in each end of the axle. Main holes are intended to accommodate the probe holder containing a plurality of ultrasonic transducers for the inspection of the axle from the inside of the hole. The main advantage is to facilitate the propagation of the ultrasounds without being subjected to the interference caused by the geometric discontinuities normally present at the ends of the axles thereby minimizing false positives in the readings of the echoes.

According to various embodiments, disclosed is an axle saddle system for an axle having an undercut between the outboard and inboard bearing lands of the axle. According to various embodiments, the axle saddle system comprises a saddle configured to fill the axle undercut in order to protect the axle from damage by the installation of a wheel onto the axle.

A hub unit that is to be installed on a vehicle is provided with: an outer ring having, on the inner circumferential surface, a first outer raceway surface and a second outer raceway surface that is disposed to the outside of the first outer raceway surface in the vehicle width direction when the hub unit is installed on the vehicle; an inner shaft that is disposed on the inside of the outer ring concentrically with the outer ring and on which a wheel is installed on the outer end in the vehicle width direction; and an inner ring that is press-fitted to the inner shaft on the inner end in the vehicle width direction.

A hub unit that is to be installed on a vehicle is provided with: an outer ring having, on the inner circumferential surface, a first outer raceway surface and a second outer raceway surface that is disposed to the outside of the first outer raceway surface in the vehicle width direction when the hub unit is installed on the vehicle; an inner shaft that is disposed on the inside of the outer ring concentrically with the outer ring and on which a wheel is installed on the outer end in the vehicle width direction; and an inner ring that is press-fitted to the inner shaft on the inner end in the vehicle width direction.

The wheel bearing apparatus has hub bolts (6a) to fasten a wheel secured equidistantly around the wheel mounting flange (6). An annular groove (7a) is formed on the outer-side surface (7) of the wheel mounting flange (6). The annular groove (7a) includes a region where the hub bolts (6a) are mounted. The outer-side surface (7) of the wheel mounting flange (6) is formed as a cut surface cut after press-fitting of the hub bolts (6a). Weight reduction apertures (circular apertures) (13) are formed between the hub bolts 6a of the wheel mounting flange (6). A diameter of a circumscribed circle A circumscribing the circular apertures (13) is set larger than an outer diameter B of the annular groove (7a). Accordingly, muddy water is easily discharged from the circular apertures (13).

The wheel bearing apparatus has hub bolts (6a) to fasten a wheel secured equidistantly around the wheel mounting flange (6). An annular groove (7a) is formed on the outer-side surface (7) of the wheel mounting flange (6). The annular groove (7a) includes a region where the hub bolts (6a) are mounted. The outer-side surface (7) of the wheel mounting flange (6) is formed as a cut surface cut after press-fitting of the hub bolts (6a). Weight reduction apertures (circular apertures) (13) are formed between the hub bolts 6a of the wheel mounting flange (6). A diameter of a circumscribed circle A circumscribing the circular apertures (13) is set larger than an outer diameter B of the annular groove (7a). Accordingly, muddy water is easily discharged from the circular apertures (13).

A replacement spindle that can be easily removed for service or replacement. The spindle may have a threaded projection corresponding to a threaded bushing, which may be secured within an axle tube. The spindle may be screwed into place for use, then unscrewed for service or replacement.

Described herein are methods and systems of a chassis of a commercial electric vehicle. In various embodiments, the chassis may include a ladder frame with a plurality of frame rails. Batteries and drive units may be packaged within the frame rails of the ladder frame. The chassis may further include an independent front suspension and batteries may be disposed between the suspension members of the independent front suspension.

Described herein are methods and systems of a chassis of a commercial electric vehicle. In various embodiments, the chassis may include a ladder frame with a plurality of frame rails. Batteries and drive units may be packaged within the frame rails of the ladder frame. The chassis may further include an independent front suspension and batteries may be disposed between the suspension members of the independent front suspension.