The present application relates to a wheel with a sound absorber, the sound absorber being mounted in a wheel air chamber to reduce acoustic resonance, wherein the sound absorber is configured as a flat hexahedral box resonator and fastened to a wheel hub through a band, a first positioning mechanism is provided between the hub and the box resonator to fix the relative positions of the hub and the box resonator, and a second positioning mechanism is provided between the box resonator and the band to fix the relative positions of the box resonator and the band. According to the technical solution of the present disclosure, the resonator is positioned and fixed more reliably on the wheel, and the wheel is simple and economical in manufacturing, and convenient and controllable in installation and operation.

A vibration absorber for vehicle wheels is capable of absorbing and attenuating vibration of a vehicle wheel and of increasing a vibration absorption capability of the wheel without changing the external appearance and design of the wheel. The vibration absorber includes a vibration absorption unit mounted on a back surface of a center cap of the vehicle wheel to absorb a first vibration in an axial direction of the wheel transmitted through the center cap

A noise-absorbing device for a railway vehicle wheel includes: at least one strip extending radially from a connecting end capable of being fastened to the periphery of the wheel, to a free end; and at least one damping mass fastened on a face of the free end of the strip, away from the connecting end. The strip includes at least two metal or composite layers and at least one layer of viscoelastic material gripped between the two or composite metal layers.

A sub-air chamber member includes: a lower surface portion disposed proximate to the outer circumferential surface of the well portion; an upper surface portion disposed radially outside of the lower surface portion; a pair of edge portions engaging with the well portion. A space portion is positioned above the upper surface portion, the space portion being formed by a part of the upper surface portion and an inner wall surface of the well portion. A strong axis of principal axes of a section of the sub-air chamber member perpendicular to an axis of the sub-air chamber member is inclined by a first predetermined angle relative to a wheel width direction Y.

A cart suspension device or system, or a castor equipped cart or platform having such a cart suspension system or device which reduces noise and vibrations when in use. The cart suspension device or system, or castor equipped cart or platform having such a cart suspension system or device utilizes a swing arm or a one-piece spring bracket and a shock pneumatic rubber damper to greatly reduce the noise and vibration inherent in carts rolling over uneven surfaces.

A variable wheel resonator system for a vehicle can suppress a resonance noise in a wide resonance frequency band occurring during driving of the vehicle by variably controlling an amount of air flowing from a first air chamber of a tire to a second air chamber and then flowing again to the first air chamber through an on/off control of a solenoid valve mounted on a wheel resonator. The system can suppress the resonance noise in the resonance frequency band that differs in accordance with a road-surface input frequency change (road-surface impact change) input to the tire, a driving speed and turning condition change, and a temperature change of an internal air of the tire.

A pneumatic tire has: a noise suppressing member that has a mounting portion that is plate-shaped and that is fixed to a tire inner surface, a convex portion that is plate-shaped and is curved convexly from the mounting portion toward an inner side in a tire radial direction, and a bent portion that is formed at a boundary between the mounting portion and the convex portion, wherein a rib is provided that extends from the mounting portion, which adjoins the bent portion, the convex portion.

A wheel/hub assembly includes an axle shaft, a wheel, and a hub supporting the wheel on the axle shaft. The wheel/hub assembly has a target resonant frequency of vibration. A tuned mass-spring damper is vibrationally coupled to the wheel/hub assembly, and has a counteracting resonant frequency of vibration that is predetermined with reference to the target resonant frequency of vibration.

An apparatus for reducing tire noise may include a rim with a tire mounted thereto in a wheel; a resonance tube provided along an external circumferential surface of the rim, and configured such that a first edge portion thereof in a width direction is provided with a first flange locked to a first side wall of the rim and a second edge portion thereof in the width direction is provided with a second flange; a strap provided along the external circumferential surface of the rim to surround the second flange of the resonance tube such that the resonance tube is brought into contact with the external circumferential surface of the rim; and a protruding portion configured to protrude from the external circumferential surface of the rim to prevent the resonance tube and the strap from being moved in the width direction thereof.

A vehicular wheel assembly defines an axis of rotation and includes a wheel having an inner hub, an outer rim, and a plurality of hollow spokes. The outer rim defines an outer circumference. Each hollow spoke of the plurality of hollow spokes extends between the inner hub and the outer rim and includes a wall that at least partially defines a hollow chamber. The outer rim defines a plurality of openings that are each in fluid communication with one of the hollow chambers and each of the openings includes a tuning member.