A wheel bearing device (1) including: an outer member (2) on the inner periphery of which an outer-side rolling surface (2c/2d) is formed; an inner member (3) on the outer periphery of which an inner-side rolling surface (3c/3d) is formed; and a plurality of rolling bodies (41) interposed between the rolling surfaces (2c/2d/3c/3d) of the outer member (2) and the inner member (3). The wheel bearing device having a spline hole (3b) formed in a through hole (3h) of the inner member (3). The spline hole includes a guide groove (3G) formed on an inner circumferential surface thereof. A guide plate (8G) of a finishing broach (8) passes through the guide groove in the inner periphery of the spline hole (3b).

A wheel hub assembly for a vehicle includes a shaft adapted for operatively connecting to a motor of the vehicle. The shaft including a threaded end portion, and a splined portion including a plurality of external splines; an integral braking hub disposed on and connected to the shaft; a wheel fastened to the integral braking hub by a plurality of fasteners; and a nut fastened to the threaded end portion of the shaft, the wheel being disposed between the nut and the brake disc portion in an axial direction of the shaft. The integral braking hub includes a central hub portion including a plurality of internal splines and a brake disc portion extending radially from the central hub portion, the brake disc portion being integral with the central hub portion and the central hub portion or the brake disc portion defining a plurality of through-holes.

A sprocket support body comprises an external spline configured to be engaged with an internal spline of a bicycle sprocket arrangement. The external spline includes a plurality of external-spline driving surfaces configured to transmit a rotational driving force between the sprocket support body and the bicycle sprocket arrangement in a circumferential direction. The plurality of external-spline driving surfaces includes at least four first external-spline driving surfaces and at least one second external-spline driving surface. The at least four first external-spline driving surfaces are respectively arranged on at least four of nine first external-spline driving positions equally arranged in the circumferential direction about a rotational center axis at a first external-spline pitch angle which is equal to 40 degrees. The at least one second external-spline driving surface is offset from the nine first external-spline driving positions in the circumferential direction about the rotational center axis.

An interchangeable hub system for a bicycle having an internal component holding a wheel cassette and a hub shell having wheel (spokes, tires) built thereon. The hub system allows for the internal component with the cassette to be interchanged between hub shells allowing for cassettes to be interchanged between wheels sets without a number of specialized tools.

The present invention relates to a wheel hub assembly for a vehicle which is suitable for being driven by a drive shaft. The wheel hub assembly includes a wheel engaging hub and a shaft engaging hub including internal splines configured for engagement with complementary external splines on the drive shaft. The shaft engaging hub is engageable with the wheel engaging hub by at least one or more axially extending threaded engaging formations in which the wheel hub assembly further includes an engaging arrangement configured for further facilitating engagement of the wheel engaging hub with the shaft engaging hub. The engaging arrangement includes a plurality of engaging formations extending in a radial direction between the wheel engaging hub and the shaft engaging hub, the plurality of engaging formations are engageable in use with complementary engaging formations to facilitate transfer of torque between the wheel engaging hub and the shaft engaging hub.

Electric motors are disclosed. The motors are preferably for use in an automated vehicle, although any one or more of a variety of motor uses are suitable. The motors include lift, turntable, and locomotion motors.

A wheel bearing arrangement for a motor vehicle includes a wheel hub. The wheel hub is connected to a wheel flange. A multi-row rolling element bearing is mounted on the wheel hub. The bearing has an outer ring and at least one inner ring which is axially prestressed by a collar of the wheel hub. A zinc flake coating is formed on at least part of the wheel bearing arrangement to improve corrosion protection.

A half shaft connects to the mounting bracket of the wheel in a splined connection. The straight external spline of the half shaft is modified to a helical or involute external spline, in which the helix angle adopted is small. The mounting bracket of the wheel can be longitudinally advanced by hand assembly only part way onto the half shaft. The rest of the longitudinal advancement during assembly occurs by tightening the nut to completely eliminate the fit clearance between the external spline and its corresponding mating arrangement. Various road tests of vehicles verify that, when using the present invention, the nut does not loosen during use of the vehicle. The invention enables the locking force of the nut to be reduced, and assembly and maintenance are convenient.

Electric motors are disclosed. The motors are preferably for use in an automated vehicle, although any one or more of a variety of motor uses are suitable. The motors include lift, turntable, and locomotion motors.

A combination structure of a hub and spokes is provided, including: a hub shell, having separate small and large flanges, the small and large flanges having first and second assembling holes, respectively; a plurality of first spokes, assembled to one of the first assembling holes and a wheel rim; a plurality of second spokes, including cylindrical spokes and aero bladed spokes, the cylindrical spokes and aero bladed spokes being alternatively assembled to the second assembling holes and to the wheel rim; as viewed along an axial direction of the hub shell, every two of the second spokes which are neighboring to each other intersect with each other to define an intersecting area, each first spoke extends and passes through one of the intersecting areas.