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

Provided is a spindle motor comprising a stator and a shaft provided in the stator. A rotor is coupled with the shaft, and a turntable is connected with the shaft. The turntable has a ball container for receiving a plurality of ball, and the ball container has an inclined inner or outer wall. A ball cover is coupled with the ball container and having decelerating means. Herein, the decelerating means comprise an inclination or protrusions formed in the ball cover.

The processing method for a dual power outlet case of an engine is like this: fastening the flywheel cover to the special flywheel clippers, locating the rear casing and the flywheel housing through the locating pin, then, using the screw fastening the rear case on the end face of the flywheel housing through connecting holes. It solves the difficulty of clamping of rear cases with accurate location, complete same with the using status. With one time clamping, one time processing, it ensures the concentricity requirement of the side outlet gearbox gear shaft or bearing holes, with stable teething, low rotating noise and long durability.

The invention relates to a novel sleeper system, and belongs to the field of railway tracks. The novel sleeper system comprises a longitudinal beam type sleeper and an elastic vibration reduction track system, wherein the longitudinal beam type sleeper is formed by connecting longitudinal beam type sleeper units one by one in series; each two adjacent longitudinal beams of the longitudinal beam type sleeper are fixedly connected with each other in the lateral direction through a connecting piece; the opposite longitudinal beam end parts of each two adjacent longitudinal beam type sleeper units are connected with each other through a sleeper connecting piece; the elastic vibration reduction track system comprises a support saddle; the longitudinal beam type sleeper is mounted on the support saddle; and a vibration reduction facility is arranged between the bottom of the longitudinal beam type sleeper and the support saddle. The novel sleeper system has the advantages that due to the longitudinal sleeper, the bending rigidity of a track is enhanced, and deformation of the track caused by repeated load is reduced; as the lateral resistance of the longitudinal beams is enlarged, the irregularity in the vertical direction of the track is reduced, and the maintenance is reduced; and as the longitudinal beams are connected with each other in the longitudinal direction, the settlement of the track at the end parts of the longitudinal beams is provided from being enlarged or damaged easily; and as rail pads are arranged continuously, foundation shake, rolling noise and wave-like deformation of the track are reduced.

The invention discloses a pulsator washing machine with door seal structures, and relates to the technical field of pulsator washing machines. The pulsator washing machine with the door seal structures comprises a tank. Pulsator type washing buckets are arranged in the tank and comprise inner buckets and outer buckets, annular outer bucket covers are arranged at openings of the outer buckets, release openings are formed in the tank and correspond to the openings of the outer buckets, openable upper covers are arranged on the release openings, annular door seals are connected with the release openings and are made of elastic sealing materials, the lower ends of the door seals are hermetically connected with the outer bucket covers, and the upper end surfaces of the door seals hermetically cling to the upper covers when the upper covers are closed. The pulsator washing machine has the advantages that the sealing of the pulsator washing buckets can be improved, and the cost can be reduced; the pulsator washing machine with the door seal structures is used for washing clothing.

The present invention relates to a universal power washing machine, including machine case, outer barrel, inner barrel, pulsator equipped in the inner barrel, power mechanism, gearing and control system. The pulsator includes a horizontal and a vertical pulsator respectively connected with the concentric output axis of horizontal pulsator and output axis of vertical one rotating in opposite directions. The inner barrel of this present invention keeps relative still when washing clothes. The aclinic and vertical pulsators are circumvolving in opposite directions, which can realize universal current lavation to turn clothes more easily and not be enlaced. At the same time, it can increases the flow intensity and improve the clean rate. It can also prolong the life of washing machine, decrease noise and save electricity by the use of new-style clutch.

A pull-out guide for furniture parts which can move relative to one another includes at least two pull-out rails, between which at least one first roller body and at least one second roller body are disposed, which are held in a rotatable manner in at least one roller body cage, the at least one first roller body having a greater nominal diameter and a lower modulus of elasticity than the at least one second roller body of the roller body cage. The pull-out guide is characterised in that a difference in diameter (Δd) between a first nominal diameter of the first roller body and a second nominal diameter of the second roller body is greater than a lower limit which is at least as great as a manufacturing tolerance (Δd1) in the diameter of the first roller body.

The invention discloses a centrifugal fan and electrical equipment. The centrifugal fan comprises a volute, an impeller, an outer rotor motor and supports. Air inlets are formed in the two sides of the volute correspondingly. The impeller is arranged in the volute. The impeller comprises a mounting disc and multiple blades arranged on the mounting disc. The mounting disc is of a disc structure, and the multiple blades are distributed along the periphery of the mounting disc at intervals. The outer rotor motor is used for driving the impeller to rotate, the outer rotor motor is provided with astator and a rotor matched with the stator, and the rotor is connected with the mounting disc. The supports are arranged on the two air inlets correspondingly, and the two ends of the stator are connected and fixed to the corresponding supports correspondingly. The rotor of the outer rotor motor is adopted for driving the impeller, the situation that vibration generated when the impeller rotates is transmitted to the volute is avoided, and the rotating noise of the centrifugal fan is reduced. The outer rotor motor is adopted, the air resistance of the air inlets of the centrifugal fan is reduced, and the energy utilization rate of the centrifugal fan is increased.

The invention provides a military full steel tubeless radial tire, and belongs to the field of a tire. Through matching noise reduction patterns with the ultrahigh-intensity framework, the sub opening support performance is improved. By aiming at the condition that the military tire can effectively reduce the tire rolling noise, the bearing performance, the tire crown rigidity, the sub opening support performance, the wear-resistant performance and the safety performance of the tire can be improved. A tire surface (1) of the military full steel tubeless radial tire comprises a tire crown (11) with noise reduction patterns and a tire shoulder (12) connected with the tire crown (11); the noise reduction patterns comprise peripheral distribution variable-pitch transverse pattern grooves (111); a plurality of bulges (113) are formed in the bottom of the transverse pattern grooves (111); support bulges (51) are arranged in the peripheral direction of the position, near a sub opening (6), of the tire side (5).

The invention discloses a commercial light truck tire. The tread of the tire is provided with three circumferential main grooves which are in a polygonal line shape. Four circumferential pattern blocks are formed between the three circumferential main grooves and the inner and outer shoulders of the tire in a dividing mode. A circumferential coherent Z-shaped steel piece penetrates through the middle of each circumferential pattern block. The circumferential pattern blocks and the circumferential coherent Z-shaped steel pieces are each provided with a plurality of sections of grains parallel to the circumferential direction of the tire. The circumferential main grooves and the circumferential coherent Z-shaped steel pieces are synchronous in a concave and convex mode in the axial direction of the tire. A plurality of transverse Z-shaped three-polygonal-line steel pieces are arranged between each circumferential coherent Z-shaped steel piece and the circumferential main grooves adjacent to the circumferential coherent Z-shaped steel piece. The circumferential pattern blocks of the whole tread also adopt unequal-pitch pattern blocks. Under the condition that road holding force of the tire is ensured, drainage performance is further improved, energy of the voice frequency peak is reduced, and therefore noise of the tire is lowered.

A tyre tread band having a centre, two shoulders on either side of the centre, and two edges on either side of the shoulders and forming a transition with the sidewalls. The profile of the tread band has at least a first arc forming part of the centre, two second arcs forming part of the shoulders, and two third arcs forming part of the edges; and, at one junction, each second arc is connected discontinuously to the first arc by a step, wherein the second arc is not tangent to, and is radially lower than, the first arc.

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 provides a multifunctional sprinkler, and belongs to the field of shower goods. The multifunctional sprinkler is provided with a nozzle and a water outlet pipe, wherein the nozzle is communicated with the water outlet pipe. The multifunctional sprinkler further comprises a support frame and a bristle wheel for scrubbing and washing; the support frame is near the water outlet pipe, and is provided with a transmission mechanism; the bristle wheel is connected with the transmission mechanism; and the bristle wheel can vertically slide corresponding to the support frame. As the support frame and the bristle wheel are arranged, the bristle wheel is used for cleaning user bodies; the transmission mechanism on the support frame can drive the bristle wheel to vertically move corresponding to the support frame, so that the condition of incapability of cleaning some parts in place of users in the shower process due to short length of hands is improved; and meanwhile, the position of the bristle wheel is adjusted through the transmission mechanism, so that two hands of the users are liberated to prevent the aching pain of arms due to holding of a washing towel for washing in the shower process, and the experience of the users in the shower process is better.

The invention discloses an electronic water pump magnetic transmission device for an automobile. The electronic water pump magnetic transmission device comprises a pump head shell and a connecting shell fixed to the rear end of the pump head shell. An inner magnetic ring sleeve and an outer magnetic ring sleeve isolated through a nonmetallic isolating sleeve are arranged in the connecting shell, an outer permanent magnet is attached to the inner circumference of the outer magnetic ring sleeve, and an inner permanent magnet is attached to the periphery of the inner magnetic ring sleeve. The inner magnetic ring sleeve and an impeller arranged in the pump head shell are fixed. A supporting shaft fixed to the nonmetallic isolating sleeve is further included. The electronic water pump magnetictransmission device is characterized in that the inner magnetic ring sleeve is assembled on the supporting shaft through multiple axially distributed ceramic ball bearings, the adjacent ceramic ball bearings abut against each other through gaskets, the outer side of the ceramic ball bearing at the frontmost end abuts against a circle of inner flange formed on the inner magnetic ring sleeve, and the outer side of the ceramic ball bearing at the tail end abuts against an externa thread nut mounted in the inner magnetic ring sleeve. Embedding grooves are formed in the positions, corresponding tothe ceramic ball bearings, of the supporting shaft, and O-shaped rings are embedded. The O-shaped rings are in flexible close fit with the inner rings of the corresponding ceramic ball bearings. The device is low in rotating noise, long in service life and more stable and reliable in operation.

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 invention discloses a refrigerated container based on a self-generating technology. The refrigerated container comprises a refrigerated container body, a refrigerating system and a turbine power generation device, wherein a liquid refrigerant compressed and condensed by the refrigerating system is divided into two paths, after being throttled in the first path, the liquid refrigerant flows into the refrigerated container body to evaporate and absorb heat of refrigerated products, the liquid refrigerant in the second path is sprayed to turbine blades to generate electricity, the generated electricity is provided for the refrigerating system to be used, if the generated electricity is redundant, the generated electricity is stored in an energy storage device, if the generated electricityis not enough to be used by the refrigerating system, the energy storage device releases the electricity or further uses external power to provide the electricity for the refrigerating system in a mixed manner, after gaseous refrigerants of the first path and the second path are converged, circulating compression and condensation are conducted, the flow flowing to the first path and the second path is distributed in real time according to the characteristic that the needed cooling capacity is smaller and smaller in the refrigeration process of the articles, and dynamic adjustment of the generating capacity is achieved. By adopting the scheme, the flow is distributed in real time, and the aims of dynamically adjusting the required power generation amount and integrally improving the self-use rate of power generation in the refrigeration process are achieved.

The invention relates to the field of range hoods, in particular to a hinge structure for an opening and closing door sheet of a range hood. The hinge structure is characterized in that a driving device is used for swinging a rocker arm so that a connecting rod can control the swinging angle of an arched hinge arm through a swinging mode, namely, the opening angle of the door sheet is controlled;different from the prior art that the connecting rod is driven by a push rod in a linear reciprocating mode, the hinge structure adopts the mode that the rocker arm and the connecting rod swing cooperatively so as to increase the swinging angle of the arched hinge arm, and therefore the opening angle of the door sheet is increased; and the rocker arm is additionally arranged between the driving device and the connecting rod, so that the components are matched with one another more stably, and the rotating noise is reduced.