64results about How to "Reduce rolling noise" patented technology

A friction apparatus is provided. The friction apparatus includes: a first member having a first surface; and a second member having a second surface that contacts the first surface, and moving while in contact with the first member, wherein at least one of the first surface and the second surface is hardened.

A motor-vehicle underbody liner, encompassing a planar porous open-cell carrier component; the carrier component being embodied for mounting onto a motor-vehicle underbody and for being carried along therewith; the carrier component including an installation side that faces toward the motor-vehicle underbody during operation as intended, and a liner side that faces away from the motor-vehicle underbody during operation as intended; the carrier component being adjusted, by suitable densification of its open-cell material, to a sound absorption behavior having a sound absorption maximum in a frequency range from 800 Hz to 1250 Hz; there being arranged on the installation side of the carrier component an additional absorber component having a sound absorption behavior whose sound absorption maximum is also located in a frequency range from 800 Hz to 1250 Hz.

The present invention provides a mouse with a soundless scroll wheel module, including a mouse body and a soundless scroll wheel module. The soundless scroll wheel module includes a supporting frame, a scroll wheel body, a mute inner ratchet wheel, a strut, an elastic component, and an encoding component. The mute inner ratchet wheel is installed in the scroll wheel body. The strut includes an engagement segment and the engagement segment is engaged with the mute inner ratchet wheel. The mute inner ratchet wheel comprises a flexible annular body and multiple flexible ratchets for reducing rolling noise.

The invention relates to a novel sleeper system in the field of railway tracks. The sleeper system comprises a longitudinal beam type sleeper and an elastic vibration attenuation rail system. The longitudinal beam type sleeper is formed by cascading longitudinal beam type sleeper units. Longitudinal beams of the longitudinal beam type sleeper are transversely and fixedly connected together through connecting pieces; the ends of the opposite longitudinal beams of the adjacent longitudinal beam type sleeper units are connected through sleeper connecting pieces. The elastic vibration attenuation rail system comprises a support; the longitudinal beam type sleeper is arranged on the support; a vibration attenuation facility is arranged between the bottom of the longitudinal beam type sleeper and the support; according to the longitudinal type sleeper, the bending rigidity of the rail is increased, and rail deformation caused by repeated loads is reduced; due to the fact that the longitudinal beams increase transverse resistance and irregularity of a perpendicular rail is reduced, the maintenance workloads are reduced. Due to the fact that connection of the continuous longitudinal beams is kept in the longitudinal direction, the phenomena that the rail settling volume of the ends of the longitudinal beams is too large, and consequently the longitudinal beams are prone to being damaged are avoided. Rail pads are continuously arranged, and therefore foundation vibration, rolling noise and rail wavy deformation are reduced.