A caster whose overall height can be reduced. A caster includes a wheel, a wheel support portion having a plate shape provided with an opening where the wheel is disposed and rotatably supporting the wheel, and a swivel mechanism portion that holds an outer peripheral portion of the opening in the wheel support portion in a horizontally swivelable manner.

A wheeled childcare device includes: a body frame; a front-wheel caster mechanism and a rear-wheel caster mechanism each including a caster holding member and a caster pivot member and each configured to allow a front wheel or a rear wheel to swivel; a front-wheel caster lock member and a rear-wheel caster lock member each configured to assume a lock position and an unlock position; a front-wheel-side displacement member and a rear-wheel-side displacement member each configured to be displaced between a first position corresponding to the lock position of the caster lock member and a second position corresponding to the unlock position of the caster lock member, according to switching of the position of a push bar; and an operation mechanism provided on the push bar and configured to operate the displacement member to switch the displacement member from the first position to the second position.

A wheeled childcare device includes: a body frame; a caster mechanism including a caster holding member and a caster pivot member and configured to allow a front wheel or a rear wheel to swivel; a caster lock member provided in the caster mechanism and configured to assume a lock position and an unlock position; a displacement member connected to the caster lock member via a connecting member and configured to be displaced between a first position corresponding to the lock position of the caster lock member and a second position corresponding to the unlock position of the caster lock member, according to switching of the position of a push bar; and an operation mechanism provided on the push bar and configured to operate the displacement member to switch the displacement member from the first position to the second position.

A self-positioning swivel caster may include a swivel mechanism that defines a home position of the caster. The swivel mechanism may include a compression spring, an upper cam, and a lower cam that is coupled to the caster wheel, in which the upper and lower cams include mating surfaces that define the home position. A bias force applied by the compression spring to the upper cam may cause rotation of the lower cam to the home position. When coupled to mobile containers, self-positioning swivel casters in home positions may increase clearance under the mobile containers for robotic drive units or other material handling equipment used to move the mobile containers, and the self-positioning swivel casters in home positions may also prevent drift or rolling of the mobile containers away from current locations.

The invention discloses a universal wheel including a support base, the support base including a top portion connected with a steering assembly that enables 360 rotation of the universal wheel, and a rolling assembly, the rolling assembly including an axle and a roller rotatably connected to the axle. A coordinate system is constructed with a center of the roller as an origin, a traveling direction of the roller as a negative direction of an abscissa, and a direction perpendicular to the abscissa and extending upward as a positive direction of an ordinate, the support base has a chute located in a first quadrant, and the axle is slidably connected to the chute along a radial direction of the roller. This apparatus has good shock absorbing performance and a strong obstacle-crossing ability.

The present invention discloses a universal wheel. A roller is rotationally connected to a mounting base. One side of the roller is provided with an annular channel and limiting grooves. The mounting base is provided with an arc-shaped elastic limiting through hole, a locking position, an unlocking position, and a positioning part. A middle position of a brake lever is pivotally connected to the mounting base, with one end for driving and the other end for a brake rod to pass through and slide and push the positioning part, enabling the brake rod to switch between the locking position and unlocking position. The present invention simplifies an assembly process while implementing effective braking.

This disclosure discloses a mobile wheel structure and a cart, including a connection assembly and a wheel assembly. The wheel assembly includes a mounting frame, a wheel, and a braking member. The mounting frame is pivotally connected to the connection assembly via a first pivot shaft, with a portion of the mounting frame connected to a wheel bearing, offsetting the wheel bearing from the axial direction of the first pivot shaft. The braking member is movably connected to the mounting frame, with both the braking member and the wheel bearing positioned on the same side of the first pivot shaft. This design simplifies the user's operation of the braking member to brake the wheel during cart usage.

A cart stabilization system and rolling cart elements for robotic surgery and other medical instrumentation are disclosed. The cart stabilization system includes a base and lifting caster systems coupled to a bottom portion of the base. Each lifting caster system includes a rolling element, a swivel foot assembly moveably coupled to the rolling element; and a hydraulic mounting base coupled to a portion of the swivel foot assembly. Methods of assembling a lifting caster system and for using a cart stabilization system are also disclosed.