A plunging assembly of a driveshaft includes: an outer housing having a bore having a plurality of outer ball grooves extending in a longitudinal direction; an inner shaft being disposed to be able to undergo relative movement in the longitudinal direction in the bore of the outer housing and having a plurality of inner ball grooves that are paired respectively with the outer ball grooves to form a plurality of ball tracks; a plunging unit connecting the outer housing and the inner shaft to allow a plunging motion and a rotational power transmission between the outer housing and the inner shaft; and a stopper that is provided in the bore of the outer housing to limit relative movement of the inner housing and the inner shaft in a direction in which the inner shaft is inserted into the bore. The outer housing has a mounting hole communicating with the bore, and the stopper is a plug member that is inserted into the mounting hole in a state that a frontal end portion thereof is exposed to the bore.

Provided is a method for manufacturing a knuckle that includes a bearing mounting portion on which a hub bearing is mounted, a damper holding portion which holds a damper, and a damper mounting arm portion which couples the bearing mounting portion and the damper holding portion, the method being such that by using one core, the knuckle is integrally casted so as to formed therein a cylindrical opening which is the inner space of the damper holding portion, a hollow opening in which the inner space in a hollow portion of the damper mounting arm portion, the hollow portion extending in a closed cross section from the damper holding portion, is continuous with an opening formed in the damper holding portion, and an arm-portion opening which is surrounded by a front arm portion and a rear arm portion of the damper mounting arm portion, extending from the hollow portion.

Provided is a method for manufacturing a knuckle that includes a bearing mounting portion on which a hub bearing is mounted, a damper holding portion which holds a damper, and a damper mounting arm portion which couples the bearing mounting portion and the damper holding portion, the method being such that by using one core, the knuckle is integrally casted so as to formed therein a cylindrical opening which is the inner space of the damper holding portion, a hollow opening in which the inner space in a hollow portion of the damper mounting arm portion, the hollow portion extending in a closed cross section from the damper holding portion, is continuous with an opening formed in the damper holding portion, and an arm-portion opening which is surrounded by a front arm portion and a rear arm portion of the damper mounting arm portion, extending from the hollow portion.

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.

A tractor or trailer axle replacement spindle and seal ring assembly includes a spindle with an elongate cylindrical body having bearing surfaces and threads. The seal ring is a shorter cylindrical component having an opening sized to achieve an interference fit with the spindle. The exterior surface of the spindle and the interior surface of the ring seal include complementary oblique, shoulders bounded by regions of constant diameter. The spindle also includes a shoulder or flange at its end opposite the threads which positively axially locates the seal ring thereon. When the two components are to be assembled, the seal ring is heated to several hundred degrees Fahrenheit and slid onto the spindle until the seal ring contacts the shoulder or flange on the spindle.

A tractor or trailer axle replacement spindle and seal ring assembly includes a spindle with an elongate cylindrical body having bearing surfaces and threads. The seal ring is a shorter cylindrical component having an opening sized to achieve an interference fit with the spindle. The exterior surface of the spindle and the interior surface of the ring seal include complementary oblique, shoulders bounded by regions of constant diameter. The spindle also includes a shoulder or flange at its end opposite the threads which positively axially locates the seal ring thereon. When the two components are to be assembled, the seal ring is heated to several hundred degrees Fahrenheit and slid onto the spindle until the seal ring contacts the shoulder or flange on the spindle.

A modular axle and motive wheel system comprises: a pair of opposed axle ends and attached axle hubs; a pair of inner motive wheels each comprising an outer surface and configured for radially extending rotatable disposition on the hubs; and a pair of inner electric hub motors each comprising an inner stator and an inner rotor, the inner stators configured for attachment to the axle hubs, the inner rotors configured for attachment to the outer surface of the inner motive wheels, the inner rotors configured for rotation of the inner motive wheels by and about the inner stators; the inner motive wheels configured for attachment of a pair of outer motive wheels each comprising an outer electric hub motor comprising an outer stator configured for selective attachment to the inner stator and an outer rotor configured for attachment to the outer motive wheel and rotation of the outer motive wheels.

A modular axle and motive wheel system comprises: a pair of opposed axle ends and attached axle hubs; a pair of inner motive wheels each comprising an outer surface and configured for radially extending rotatable disposition on the hubs; and a pair of inner electric hub motors each comprising an inner stator and an inner rotor, the inner stators configured for attachment to the axle hubs, the inner rotors configured for attachment to the outer surface of the inner motive wheels, the inner rotors configured for rotation of the inner motive wheels by and about the inner stators; the inner motive wheels configured for attachment of a pair of outer motive wheels each comprising an outer electric hub motor comprising an outer stator configured for selective attachment to the inner stator and an outer rotor configured for attachment to the outer motive wheel and rotation of the outer motive wheels.

Provided are a steering function-equipped hub unit that has a simple structure, high rigidity and a reduced size, a steering system, as well as a vehicle including the steering function-equipped hub unit. The steering function-equipped hub unit includes: a hub unit main body including a hub bearing supporting a wheel; a unit support member provided to a knuckle of a suspension device and rotatably supporting the hub unit main body about a turning axis extending in a vertical direction; and a steering actuator configured to rotationally drive the hub unit main body about the turning axis. The hub unit main body is supported by the unit support member through a preloaded rolling bearing.

The present utility model refers to a rolling device and, more particularly, an improved multi-directional ball caster-type device having an increased slope, which means a smaller angular slope level, or a more acute inclination angle between the central vertical axis of the device and the surface upon which it rolls. The slope, or inclination angle of the present improved device is from 62 to 50, or less. As the inclinations angle can be more acute, the object supported on the rolling system, e.g. a luggage case, can be more sloped without having friction between the main ball involving structure and the ground.