Provided is a wheel which is inexpensive, light, and sufficiently rigid. A wheel 6a includes an annular rim 60 to which a tire 6b is externally fitted, a hub 61 which is arranged at a center portion of the rim 60 and to which an axle is connected, and a disk 62 which is attached with the rim 60 at a periphery portion and which covers one side of the wheel 6a. The disk 62 includes a planar portion 62a and a first rib 62b provided at a surface of one side of the planar portion 62a and extending in the radial direction. The planar portion 62a is provided with a first groove 62d at a surface of the other side at a position corresponding to the first rib 62b.

A device comprising a plurality of hollow units (11), each unit comprising a circumferential wall (12) having a first end region (5) and a second end region (13), wherein the first end region is narrower than the second end region and the plurality of units are in an interconnected arrangement, such that the first end region of a first unit (14) of the plurality of units is received within the second end region of a second unit (15) of the plurality of units, and a flexible elongate member (3) extends longitudinally through the interconnected units, whereby the circumferential walls of the interconnected first and second units abut each other and the interconnected units are secured together.

An automatically moving floor treatment appliance has at least one wheel, which can be rotated about an axis of rotation and which has a circumferential surface, wherein the circumferential surface has a plurality of profile blocks, which, based on the axis of rotation, face radially to the outside and which are embodied in succession in the circumferential direction. To facilitate a negotiating of obstacles by means of the floor treatment appliance, the profile blocks form a profile of the circumferential surface, which is completely heterogeneous in the circumferential direction, so that the structure of the profile is not repeated in the circumferential direction.

A method of forming a non-pneumatic tire is provided that includes the steps of providing an outer shear band ring (56) and an intermediate section (14) that has a supporting structure (16). The intermediate section (14) is collapsed from an uncollapsed state to a collapsed state. The intermediate section in the collapsed state is inserted inside of the outer shear band ring such that the outer shear band ring is located outward from the intermediate section in a radial direction of the tire. Compression of the intermediate section (14) is released when the intermediate section (14) is inside of the outer shear band ring (56) so that the intermediate section returns to the uncollapsed state from the collapsed state. In one embodiment, the compressing step of the intermediate section (14) is performed by a compression device (68) that has a plurality of gripping members.

A method of forming a non-pneumatic tire is provided that includes the steps of providing an outer shear band ring (12) that has an inner diameter. An intermediate section (14) is provided that has a supporting structure. An outer diameter (102) of the intermediate section (14) in the uncompressed state is greater than the inner diameter (70) of the outer shear band ring (12). The intermediate section is compressed from the uncompressed state to a compressed state, and is inserted inside of the outer shear band ring (12). Compression of the intermediate section is released when the intermediate section is inside of the outer shear band ring, and the intermediate section (14) moves from the compressed state to a state of interference fit with the outer shear band ring (12).

A method of forming a non-pneumatic tire (10) is provided that includes the steps of providing an outer shear band ring (12), an intermediate section (14) with a supporting structure (16), and an inner shear band ring. The intermediate section (14) is positioned inside of the outer shear band ring (12) such that the outer shear band ring is located outward from the intermediate section in a radial direction of the tire. A hub (20) is positioned inside of the intermediate section such that the intermediate section (14) is located outward from the hub (20) in the radial direction.

A releasable wheel assembly is presented. The releasable wheel assembly includes a base plate and a bracket coupled to the base plate. The bracket includes multiple bosses and each boss includes a hole. An axle passing through the hole of each boss. The axle includes a circumferential groove adjacent to each end of the axle. Additionally, a brace is coupled to the base plate and the axle.

A roller unit having an integrated fastening portion includes a supporting shaft fastened to a containing body or a containing main body that can slide and having first and second flanges formed in multi steps with different outer diameters, a rotating body rotatably fixed to a side of the supporting shaft, and a washer coupled to a side of the rotating body to surround and fix the second flange, thereby preventing separation of the supporting shaft and the rotating body. Therefore, it is possible to more conveniently combine the supporting shaft and the rotating body and to prevent separation of the supporting shaft and the rotating body, whereby is possible to improve various functions.

A magnetic robot crawler designed to efficiently adhere and traverse a ferrous surface partially or fully underwater, regardless of orientation. The crawler includes a vehicle body, a plurality of drive wheel assemblies, and a plurality of gearmotors. The vehicle body houses the necessary electronical components. The drive wheel assemblies are peripherally and externally mounted to the vehicle body in order to support the vehicle body. Each of the drive wheel assemblies is torsionally coupled to a corresponding gearmotor. Each of the drive wheel assemblies includes a tubular housing, a wheel, an annular cavity, and a semi-annular magnet. The wheel is rotatably mounted to the vehicle body through a tubular housing and is torsionally coupled to the corresponding gearmotor through a magnetic coupling. The annular cavity laterally traverses into the wheel and receives the semi-annular magnet. The semi-annular magnet stays stationary while the wheel turns about the semi-annular magnet.

A magnetic robot crawler designed to efficiently adhere and traverse a ferrous surface partially or fully underwater, regardless of orientation. The crawler includes a vehicle body, a plurality of drive wheel assemblies, and a plurality of gearmotors. The vehicle body houses the necessary electronical components. The drive wheel assemblies are peripherally and externally mounted to the vehicle body in order to support the vehicle body. Each of the drive wheel assemblies is torsionally coupled to a corresponding gearmotor. Each of the drive wheel assemblies includes a tubular housing, a wheel, an annular cavity, and a semi-annular magnet. The wheel is rotatably mounted to the vehicle body through a tubular housing and is torsionally coupled to the corresponding gearmotor through a magnetic coupling. The annular cavity laterally traverses into the wheel and receives the semi-annular magnet. The semi-annular magnet stays stationary while the wheel turns about the semi-annular magnet.