An attachment for a vehicle wheel allows operation when the tire is flat. The attachment may include a main body which is circular or substantially annular when seen in an axial direction, a positioning device for positioning the attachment on a rim of the vehicle wheel, and a fastening device for fastening the attachment to the rim of the vehicle wheel. The fastening device may be adapted to be actuated independently of the positioning device.

The invention relates to an emergency wheel attachment (10) for a vehicle wheel (12), the emergency wheel attachment having a substantially annular mounting unit (18), which is used to mount the emergency wheel attachment to the vehicle wheel, and an annular tread unit (20), which in the operating state contacts a road, the mounting unit being provided with at least two retaining claws (22) which are designed to fasten the mounting unit to the rim (14) of the vehicle wheel by engaging behind the rim flange (26), at least one of the retaining claws being radially movable in order to change its distance from the center point of the mounting unit, the mounting unit having an annular actuating element (46) which is rotatable about an axis of rotation (A) coinciding with the vehicle wheel axis in the operating state of the emergency wheel attachment and forms part of a gear mechanism which converts a rotation of the actuating element (46) into a radial movement of the or all radially movable retaining claws (22), and the mounting unit (18) comprising a drive device which is coupled or can be coupled to the actuating element (46).

An attachment for a vehicle wheel allows the vehicle to be driven when the tire is flat. The attachment includes a main body having a mounting portion and a running surface portion. When ready to be mounted, the mounting portion has a closed circumference.

The invention relates to an attachment (14) for a vehicle wheel (1) for enabling a driving operation with restricted tyre functions and to a system comprising an attachment (14) and a rim (2) of a vehicle wheel (1).

The present disclosure provides a composite powered wheel set, a train, a wheel-rail system and a train control method. The composite powered wheel set comprises two booster wheels and two support wheels mounted on a driving axle. The booster wheels are fixedly mounted on two ends of the driving axle, the support wheels are mounted on the driving axle via bearings, the moving axle is connected to a first transmission device, which is connected to a first power mechanism, and the driving axle is further connected to a train bogie via a connecting device. Booster wheels and booster rails are provided to improve anti-skid performance, so the train will not skid when running on a steep slope or under a heavy traction load. Restrictions on the railway slope, train traction load, and train speed are eliminated to a great extent, and the application scope of the wheel rails is expanded.

The TTAssembly is a three tire and rim wheel assembly. The assembly consists of a large diameter center wheel with two identical smaller diameter wheels on the inboard and outboard sides respectively. The TTAssembly replaces the standard single rim single tire assemblies on a vehicle hub, maximizing gas mileage and the safety requirement of the vehicle. It also reduces maintenance costs and eliminates the need for a spare tire.

An attachment is provided for a vehicle wheel, having a rim and a tire arranged on the rim, for enabling a driving operation with a restricted tire function in an operating state in which the attachment is fastened on the vehicle wheel. The attachment may include a stationary section configured to be fastened immovably with respect to the rim in the operating state in which the attachment is fastened on the vehicle wheel, a tread section with a tread for contacting the road, and at least two clamping devices configured to engage behind a section of the rim to fasten the attachment on the vehicle wheel, wherein the tread includes at least one tread segment arranged movably in a circumferential direction with respect to the stationary section in the operating state in which the attachment is fastened on the vehicle wheel.

Wheel hub adaptor (11) attachable to vehicle wheel to attach vehicle accessory for rotation with vehicle wheel, has an inner mounting plate (15) with recesses or apertures (17) to match a vehicle wheel stud pattern, a body (19) extending from the plate (15) to an outer mounting plate (27) having a mount to which the vehicle accessory attaches. The mount has apertures (65) which align with studs (75) on a mating mount of the vehicle accessory. The inner mounting plate and the outer mounting plate mount to the vehicle wheel and vehicle accessory respectively, by rotating apertures (17 65) to stop portions (35 71), and is secured by a bolt passing through one of two circular apertures (43 45) or (67 69). Vehicle accessories can be provided like a paddle to self-propel the vehicle in sand, and a wheel to widen the vehicle track.

An auxilairy traction assembly adapted to be connected to a first wheel of a first tire of a vehicle. The auxiliary traction assembly including a second tire and a second wheel, the second wheel is a one-piece elongated tube having a first end adapted to be connected to the first wheel of the first tire and a second end housed in the second tire, the first end of the second wheel has a first flange having a curved inward shape that fits into a central hole of the first wheel, the second end of the second wheel has a second flange having a curved outward shape; and when the auxiliary traction assembly is connected to the first wheel, the first tire is spaced apart from the second tire by 2 inches by the one-piece elongated tube of the second wheel.

An attachment for a vehicle wheel enables driving operation with limited tire function. The attachment may include a base body, a tread surface for contacting a road surface, at least one bracing apparatus configured to engage with a hook portion behind a portion of a rim of the vehicle wheel and a bracing mechanism having a contact portion configured to actuate the bracing apparatus and to bring the hook portion into engagement behind the portion of the upon actuation of the contact portion.