A mobile writing board system includes a frame extending from an upper portion to a lower portion; a writing board secured to the frame; a module secured to the lower portion of the frame; and a mobile device secured to the lower portion of the frame. The mobile device includes a housing; and a plurality of wheels configured to move within the housing while in a stationary position and configured to extend outside the housing during transit.

A system including a frame and a pair wheel of assemblies to engage with one or more tracks of a structure. The pair of wheel assemblies include a first hub assembly, having a first wheel and a first attachment mechanism to engage with the one or more tracks of the structure, and a second hub assembly having a second wheel and a second attachment mechanism to engage with the one or more tracks of the structure. The system further includes an elongated rod coupling the first hub assembly to the second hub assembly, where a movement of the elongated rod causes the first attachment mechanism and the second attachment mechanism to engage with the one or more tracks of the structure.

An apparatus to scoop debris from a surface is described. The apparatus comprises a trolley frame, a first and second wheels coupled to a first and second gear assemblies and designed to rotate in a first direction of rotation. The first and second gear assemblies are coupled to a opposite sides of the trolley frame. The apparatus further comprises an axle coupled to the trolley frame, using the first gear assembly and the second gear assembly, wherein the axle is configured to rotate in a second direction opposite to the first direction of rotation of the first wheel and the second wheel. A plurality of parallel spokes is attached to the axle that rotate with the axle, wherein each of the plurality of spokes are bent at an angle at their respective ends. A detachable debris collection net is coupled to the trolley frame.

Disclosed is a mecanum wheel, including a mecanum wheel body and a drive device. A wheel axle hole is formed in the mecanum wheel body. The drive device is partially or completely arranged in the wheel axle hole. The axis of a connecting shaft of the drive device is collinear with a rotary shaft of the mecanum wheel body, and the mecanum wheel body rotates along with a housing of the drive device. Further disclosed are a mecanum wheel with a shock absorbing device, a chassis including at least one pair of mecanum wheels, and an assistant robot including a chassis.

Several solutions are described for making it easier to move a surgical robotics patient table, either from rest or to turn it. The table has a base, a support, and a table top on which the patient is supported. A number of casters are mounted to a body of the base. In one case, controllable jacks lift the body to release the casters thereby allowing them to swivel to a desired orientation. In another case, a drive assembly is rotatably coupled to the body of the base and includes an electric drive motor and a drive wheel to drive the table across the floor. Other aspects are also described and claimed.

A rotary drive device includes a pair of drive force transmissions, a pair of decelerators, a pair of carriers, and at least one coupler. Driving rollers are included in the pair of drive force transmissions. Driving rollers transmit drive force to a main wheel. The main wheel includes driven rollers. The pair of drive force transmissions are rotatable about a rotation axis. The pair of carriers accommodate at least a portion of the decelerators. The pair of carriers oppose each other in an axial direction along the rotation axis. The pair of carriers include a first carrier and a second carrier that are directly or indirectly coupled by the at least one coupler.

A rotary drive device in a mobile body includes a main wheel and a pair of drive assemblies opposing each other and each driving the main wheel. The main wheel includes driven rollers. One of the pair of drive assemblies includes a motor, a motor case, a drive force transmission, and driving rollers. The driving rollers are in the drive force transmission along a circumferential direction, and contact at least a portion of the driven rollers from one side of the rotary drive device of the axial direction. The drive force transmission rotates to transmit a drive force of the motor to the main wheel via the driving rollers. At least a portion of the motor case opposes at least a portion of the driving rollers in the axial direction.

A wheel adapter for connecting to a cargo container and providing the cargo container with rolling mobility. The wheel adapter includes an adapter body, one or more wheels rotatable with respect to the adapter body, and a container connector extending from the adapter body for connection to the cargo container. A pusher mechanism engages the adapter body and can be operated to move the adapter body relative to the wheel or wheels in order to vary the vertical placement of the wheel(s) in relation to the container connector. For example, the pusher mechanism can include a wheel-displacement bolt for translationally moving the wheel(s) upward and downward with respect to the container connector, and/or an airbag unit for pivoting the adapter body in relation to the wheel(s) and thus lowering or raising the wheel(s) with respect to the container connector.

A wheel assembly has a wheel with a hub. A rotation surface disposed in the hub has a bore. A sleeve insertable in the bore of the rotation surface has an outer surface with a circumferential groove and first and second opposite axial ends. The first axial end has a shoulder extending radially outward. A resilient ring disposed in the circumferential groove is compressible to a compression diameter sufficient to enable the sleeve to be inserted in the bore of the rotation surface. The resilient ring is expandable to an expansion diameter greater than the inner surface diameter of the bore of the rotation surface when unconstrained. The circumferential groove is spaced from the shoulder at a distance sufficient to enable the resilient ring to expand to the expansion diameter when the sleeve is inserted in the bore of the rotation surface and the shoulder is adjacent the rotation surface.

A device includes an elevating work platform affixed to a drive unit that can move in any direction and rotate in place.