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 discloses an intelligent electronic door lock, which consists of two parts, namely an external lock and an internal lock, and is characterized in that: an electronic key / intelligent card induction zone, a light-emitting diode (LED) lamp and a key zone are sequentially arranged on the external lock from top to bottom; the electronic key / intelligent card induction zone, the LED lamp, the key zone and an emergency external power supply jack are connected with a control device of the internal lock through data lines; the internal lock comprises an internal lock shell and a transmission device, a driving device and a control system which are arranged in the internal lock shell; the transmission device comprises a sliding groove, a limiting groove, a position induction block and abolt which are integrated, and a positioning hole, a shifting rod and an umbrella-shaped tooth which are integrated; the driving device comprises a motor fixed in the internal lock shell and a bevel gear arranged on an output shaft of the motor; and the control system comprises a printed circuit board (PCB), an inductor and set keys.

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.

The invention discloses a bearing capable of dissipating heat, relating to the field of produced parts of industrial machinery. The bearing comprises bearing outer rings and bearing inner rings, wherein rolling bodies are arranged between the bearing inner rings and the corresponding bearing outer rings; one side, close to the rolling bodies, of each bearing outer ring is of a concave surface shape, one side, close to the rolling bodies, of each bearing inner ring is of a concave surface shape, the concave surfaces of each bearing outer ring and the corresponding bearing inner ring form an arc surface, and each arc surface is connected with the rolling bodies; a fixed frame is arranged among the rolling bodies, sealing rings are arranged between the bearing outer rings and the corresponding bearing inner rings, the thicknesses of the sealing rings are 30mm-100mm, and the sealing rings are used for isolating the rolling bodies from the outside; compression plates are arranged outside the sealing rings, and heat-dissipation oil layers are arranged between the compression plates and the sealing rings. The bearing capable of dissipating the heat is simple in structure, reliable in rotation performance, low in rotation noise, good in heat-dissipation performance, wide in application rang and low in cost and can work in a high-speed running environment.