An automatic cleaner is provided. The automatic cleaner may include a main body, and a wheel assembly disposed in the main body to allow the main body to move. The wheel assembly may include a drive, a first wheel rotated by a power of the drive, and a second wheel rotated by the power of the drive. The second wheel may include a plurality of contact protrusions on an outer circumferential surface thereof.

A robot cleaner including a cleaner body, a dust suction unit and a dust collection unit attached to the cleaner body, and a driving device to move the cleaner body, wherein the driving device includes a power generation unit to generate power, a power transmission unit to transmit the power generated by the power generation unit to a wheel such that the wheel is rotated by the power transmitted from the power transmission unit, and wherein the wheel includes a wheel member connected to the power transmission unit, and a first member and a second member attached to an outer circumference of the wheel member such that the first member and the second member contact different floor surfaces.

A wheel for a non-motorized vehicle (e.g., a shopping cart) can include a housing assembly and a tread assembly. The housing assembly can be configured to sealingly house electronics or other components. The tread assembly can removably mate with the housing assembly such that the electronics or other components remain closed and/or sealed within the housing assembly when the tread assembly is mated or unmated with the housing assembly.

The present invention discloses an obstacle-adaptive mechanism of a moving device, which uses a driving wheel, a driving gear, a passive wheel, a passive gear and an intermediate gear as a transmission mechanism, wherein the driving gear is connected to one side of the driving wheel, the passive gear is connected to one side of the passive wheel, the intermediate gear is disposed between the driving gear and the passive gear to keep the driving wheel and the passive wheel rotating in the same direction to help crossing an obstacle, thereby preventing the obstacle-adaptive mechanism from being stuck by the obstacle and allowing the obstacle-adaptive mechanism to successfully crossing the obstacle. Therefore, the obstacle-adaptive mechanism of the moving device can provide the ability for crossing obstacles.

Disclosed is a robot cleaner including a main body for forming an exterior of the robot cleaner, each wheel cover detachably disposed in the main body, each driving module movably coupled to each wheel cover, and each wheel coupled to each driving module and rotated by receiving a driving force from each driving module, wherein each wheel includes a wheel body coupled to each driving module and forming an appearance of each wheel, a plurality of treads arranged to be spaced apart from each other along a circumferential face of the wheel body, and a plurality of ribs respectively disposed between the treads and protruding radially outward of each wheel.

A robot cleaner including: a cleaner body; a motor, configured to be fixed to the cleaner body, and provide a rotational force; a gear unit configured to transmit the rotational force of the motor; a wheel configured to rotate and drive the cleaner body according to the rotational force of the motor transmitted by the gear unit to the wheel; and a suspension including a first end portion pivotally supportable on a pivot of the cleaner body, which is spaced apart from a rotary shaft of the motor, and a second end portion to extend from the first end portion and support the wheel to move up and down with respect to the cleaner body as the second end portion moves in a first direction and a second direction around the pivot of the cleaner body.

The present invention relates to a robot vacuum cleaner comprising sub-wheels having variable rotational positions, the robot vacuum cleaner comprising subframes rotatably attached to main frames to ground the sub-wheels when in a constrained state.

The present invention relates to a robot vacuum cleaner comprising sub-wheels having variable rotational positions, the robot vacuum cleaner comprising subframes rotatably attached to main frames to ground the sub-wheels when in a constrained state.