Disclosed are: a caster mounted on a teaching aid including a whiteboard, or furniture, etc. so as to conveniently and stably convert between a movement state and a stopping state; and a whiteboard including the caster. The caster is mounted on a pedestal fixed to the lower end of a column frame on which the whiteboard is mounted.

A wheel assembly having two cylindrical bodies, each with a diameter approximately the same as the interior diameter of a tire. On the front body, are found an outer edge on one side and bolt receiving means on the opposite site and alignment holes. On the back body is found an outer edge, bolt receiving means that run across the entire length of the back body, are located on the interior of the body and are placed equidistant around the body. Each bolt receiving means aligns with a complementary bolt receiving means on the front body. The back body also has alignment pegs that fit into the alignment holes of the front body for proper alignment of the front and hack bodies. Holes on the hub, located on the front body permit placement of the tire and wheel assembly onto an axle of an automobile or other wheeled device.

An axle device for a motor vehicle includes an axle shaft, a wheel receiving unit fixed on an end of the axle shaft, and a support body on which the wheel receiving unit is supported from rotation fixed about an axis of rotation. A bearing unit is arranged between the support body and the wheel receiving unit. The bearing unit includes an inner bearing shell at least partially formed by a surface portion of the wheel receiving unit, an outer bearing shell at least partially formed by a sleeve body abutting the support body, and a bearing assembly arranged between the inner bearing shell and the outer bearing shell.

A system for manufacturing a wheel includes a cope mold portion with internal cope mold walls and a drag mold portion with internal drag mold walls. The internal cope mold walls and internal drag mold walls define at least in part perimeter boundaries of a wheel cavity. The wheel cavity includes a cavity center portion configured to form a wheel center portion of a wheel after solidification of a molten alloy in the cavity center portion, a cavity plate portion configured to form a wheel plate portion of the wheel after solidification of a molten alloy in the cavity plate portion, and a cavity flange portion configured to form a wheel flange portion of the wheel after solidification of a molten alloy in the cavity flange portion. The system includes a chill component positioned within the wheel cavity adjacent the cavity flange portion. The chill component is configured to provide directional solidification from the cavity flange portion toward the cavity plate portion of molten alloy in the wheel cavity.

A wheel includes a first hoop attached to a second hoop about a circumferential interface. The first and second hoops form at least part of an enclosed box structure positioned circumferentially around the wheel and adjacent to an outboard side of the wheel. The box structure may be formed at least in part by circumferential projections of the first hoop and the second hoop. The wheel may also include a central hub that optionally includes spokes. In some embodiments, the central hub may form part of the enclosed box structure. In some embodiments, a first hoop portion and a second hoop portion may be integral or unitary, with a box structure integrally formed between the hoop portions.

Disclosed are wheel assemblies for motor vehicle powertrains, methods for making and methods for using wheel assemblies, and motor vehicles with wheel units each composed of a tire and a wheel assembly. For example, a multi-hub wheel assembly for a motor vehicle is disclosed. The motor vehicle includes a tire and a suspension component, such as a hub-and-bearing assembly, mounted to the vehicle body. The wheel assembly includes an outer wheel with an annular rim well attached to a central hub. The central hub mounts onto the vehicle's suspension component, e.g., via lugs and bolts, while the tire mounts onto the rim well. The wheel assembly also includes an intermediate hub with a deflection annular rim attached to a mounting base. The mounting base is attached to the outer wheel. The intermediate hub mounts inside a hollow core of the outer wheel, interposed between the central hub and the suspension component.

A vehicle wheel is provided which includes a sub air chamber member capable of suppressing a surface deformation amount in case of an action of an internal pressure of the sub air chamber member. A sub air chamber member of a vehicle wheel includes an upper surface member, a lower surface member, and bridge sections causing the upper surface member and the lower surface member to strike on each other. An end-to-end distance of an opening part of a bridge section opening on an upper surface of the upper surface member is set longer than a distance to an end portion of an opening part of another bridge section adjacent thereto. Moreover, the area of the opening parts of the bridge sections opening on the upper surface of the upper surface member is larger than the area of other general parts.

A passive securing device is provided for restricting movement of a solar panel service vehicle (SPSV), the passive securing device including a barrier portion, a restorative element and a mechanical limiter. The SPSV includes at least one motorized wheel, having an abrasive surface, for securing the SPSV moving over a platform into a predetermined area. The mechanical limiter prevents upwards movement of the SPSV from the platform when the SPSV is in the predetermined area. The barrier portion in a far edge position and the restorative element in a relaxed position prevents the SPSV from passively exiting the predetermined area. When the motorized wheel is actively rotated into the barrier portion, the abrasive surface forces the restorative element into a compressed position, thereby moving the barrier portion into a near edge position and enabling the SPSV to leave the predetermined area.

A system for locking a rotatable shaft may include a base member couplable to the rotatable shaft and rotatable about a rotation axis of the rotatable shaft through a plurality of angular positions, the base member comprises two or more curved slots; two or more pins positioned with respect to the base member such that at least one of the two or more pins is aligned with at least one of the two or more curved slots of the base member for any angular position of the base member; and an actuator to displace at least one of the two or more pins to removably insert at least one of the two or more pins into at least one of the two or more curved slots.

Provided discloses an integrated axle assembly and structural assembly. The integrated axle assembly comprises an axle tube assembly extending in a first direction; a front support arm extending circumferentially from the axle tube assembly in a second direction perpendicular to the first direction for attachment to the frame; a rear support arm extending circumferentially from the axle tube assembly in a third direction away from the second direction for mounting a resilient assembly; and a brake base plate extending in a peripheral direction from the circumference of the axle tube assembly; the axle tube assembly, front bracket arm, rear bracket arm and brake base plate are molded in one piece, which improves the assembly efficiency.