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36results about How to "Reduce resonance amplitude" patented technology
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Engine Crankcase Breathing Passage With Flow Diode
InactiveUS20150059718A1Shorten speedStable flow patternCombustion enginesCrankcase ventillationBreatherCrankcase
An internal combustion engine is disclosed which includes an improved crankcase drain back system. A set of drain flow diodes are disposed in each of the drain lines to direct fluid flow in a direction from the head portion to the crankcase. Likewise, a set of breather flow diodes are disposed in the breather lines to direct fluid flow in a second direction from the cylinder portion to the head portion. The flow diodes include a series of stacked flow diode elements which allow flow in one direction, while resisting flow in the opposite direction.
Owner:GM GLOBAL TECH OPERATIONS LLC
Sound absorbing and insulating barrier
ActiveCN101016729AReduced number of fatigue stress cyclesReduce the excitation forceNoise reduction constructionEngineering
The invention relates to a shield besides road to adsorb noise, which comprises a sound adsorption shield and a support frame, wherein the shield plate and the support frame or / and support frame and the base are connected via flexible element or / and damping element, the flexible element and the damping element can be serially, parallel or integrally connected. The invention can improve sound adsorption ability and protect the base, with long service life, less increase on the load of road, and high safety or the like.
Owner:QINGDAO CREATE ENVIRONMENT CONTROL TECH
Fixed connection structure used for high speed railway sound barrier transparent cell boards
InactiveCN101660297AReduce resonance amplitudeExtend your lifeNoise reduction constructionSound barrierRivet
The invention provides a fixed connection structure used for high speed railway sound barrier transparent cell boards, belonging to the field of railway components. The structure comprises a sound barrier 1, a main buffering sealing joint strip 2, an aluminium alloy section frame 3, a side buffering sealing joint strip 4, an aluminium alloy bracket 5, a steel angle plate 6, a steel angle plate pulling plate 7 and an aluminium rivet 8, wherein the aluminium alloy section frame 3 is provided with a groove 31, a long groove 33, a side groove 34, a side hole 35 and a rectangle center hole 36; a wall board 32 is arranged under the aluminium alloy section frame; the groove 31 is used for placing the main buffering sealing joint strip and then placing the sound barrier; the long groove 33 is arranged on the wall board 32 and connected with a hook of a steel angle pulling plate bend angle 71; the side groove 34 is used for placing the side buffering sealing joint strip 4; the side hole 35 is inserted with the aluminium alloy bracket 5; and the rectangle center hole 36 can be inserted with the steel angle plate 6 which is riveted with the wall board 32 after punching through with the connection angle of 90 degrees. The fixed connection structure has the advantages of being capable of bearing the impact effect of pulsating wind loading generated by high speed train, and being capable ofstably bearing the load of air mechanics for a long time.
Owner:CHINA RAILWAY TAIKE ENVIRONMENTAL PROTECTION ENG CO LTD
Resonance reduction device for ram air turbine
Owner:HAMILTON SUNDSTRAND CORP
Resonance reduction device for ram air turbine
ActiveUS20100158698A1Reduce undesired vibrationReduce needPower installationsWeight reductionResonanceRam air turbine
A ram air turbine assembly includes a preferentially located mass that modifies the resonance frequency of the assembly so that vibration is reduced to desired levels. The example mass can be fixed in a specific location on the ram air turbine or can be deployable once the ram air turbine is moved to an operating position.
Owner:HAMILTON SUNDSTRAND CORP
Sound eliminating large-damp self-resetting rail mechanism
InactiveCN107448594AReduce resonance amplitudeAvoid destructionGearing controlStable stateRubber material
The invention discloses a sound-absorbing large-damping self-resetting track mechanism, which adopts a C-shaped track body. The track body is injected with a two-color injection mold. The inside of the track body is inlaid with rubber materials. Dry friction occurs between the rail bodies. The bullet bears the extrusion force of the gear slot, and the internal spring is compressed accordingly. The extruded spring has the function of storing energy. When the external force is removed, the spring returns to its original state, and the whole mechanism is reset at the same time. The present invention adopts a structure with large damping to help reduce the resonance amplitude of the structure, and avoid mechanism damage caused by the vibration stress inside the structure; it helps the mechanism to quickly recover to a stable state after being subjected to an instantaneous impact; Acoustic radiation from mechanical vibrations. The present invention also realizes the shift form of the internal mechanism of the gear shifter, which is self-resetting. This mechanism is realized by the principle that the spring deforms under the action of the external force and returns to its original shape after the external force is removed.
Owner:新阳荣乐(上海)汽车电子有限公司
Vehicle brake system simulation testing stand
The invention discloses a vehicle brake system simulation testing stand. The testing stand includes a testing stand, a column and a fixing stand, wherein one end of a top portion of the testing standis equipped with the fixing stand through a bolt, one side of the fixing stand is equipped with a vehicle bridge portion through a mounting support, one side of the vehicle bridge portion is connectedwith a brake disc through a rotation shaft, one side of the brake disc is welded with a connection shaft, one end of the connection shaft is connected with the rotation shaft through a coupling, a top portion of the vehicle bridge portion is equipped with a casing through a bolt, the casing is internally provided with a doughnut shape-like oil cavity, two sides at a bottom end in the doughnut shape-like oil cavity are provided with a piston through a mounting member, two sides of a top end of the brake disc are provided with friction blocks, and the other end of a top portion of the testing stand is equipped with a supporting plate through a bolt. The testing stand is advantaged in that functions are various, operation is simple, production is convenient, multiple test demands are satisfied, and the testing stand is suitable for wide popularization and application.
Owner:李俊光
Novel moon pool stabilization and wave absorbing wall
InactiveCN112193359ASlow down the attackEnsure safetyShip vibration reductionMoon-poolsEngineeringMechanical engineering
The invention relates to a novel moon pool stabilization and wave absorbing wall which is arranged on the short side wall of a moon pool and comprises vertical stabilization and wave absorbing walls which are vertically arranged in front of the short side wall of the moon pool at certain intervals, and horizontal stabilization and wave absorbing walls which are horizontally arranged are arranged between the vertical stabilization and wave absorbing walls and the short side wall of the moon pool. A plurality of holes are respectively formed in the vertical stabilization and wave absorbing wallsand the horizontal stabilization and wave absorbing walls. Compared with the prior art, according to the design, moon pool resonance can be avoided more effectively, and a better wave absorbing and stabilizing effect is achieved; the two layers of vertically-arranged stabilization and wave absorbing walls can reduce slapping of transverse waves on a ship body to a greater extent, the three layersof horizontally-arranged stabilization and wave absorbing walls can slow down vertical movement of the moon pool, and finally the effects of stabilization and wave absorbing and ship body protectionare achieved.
Owner:SHANGHAI JIAO TONG UNIV
Audio frequency playing method and device
ActiveCN104021808AReduce resonance amplitudeImprove job stabilityUndesired vibrations/sounds insulation/absorptionVolume reductionAudio frequency
The invention discloses an audio frequency playing method and device, and belongs to the computer technical field; the method is applied in electronic equipment having a hard disk and an audio frequency output device; the method comprises the following steps: obtaining audio frequency data frames to be played; reducing volume value of audio frequency data corresponding to a pre-stored interference frequency point in the audio frequency data frames, thus obtaining the audio frequency data frames after volume reduction process; playing the audio frequency according to the audio frequency data frames after the volume reduction process. The method and device can improve work stability of the hard disk in the electronic equipment.
Owner:LENOVO (BEIJING) CO LTD
Methods and apparatus to create resonance in water and to destroy resonance in bacteria
InactiveUS20110196188A1Increase amplitudeReduce resonance amplitudeElectrotherapyEnergy modified materialsBiological bodyResonance
A method to create resonance in water at the period 24 / 3−217 hour, wherein said water is exposed, during a limited time, to electromagnetic energy having the period 24 / 3−217 hour, resulting in that continued resonance in said water is maintained by electromagnetic energy in the air having the period 24 / 3−217 hour and where said water include sea water, lake water, river water, water in wells, water in reservoirs, water in beverages, water in food, water in human body fluids and cells, water in other types of species and organisms and molecule structures consisting of H2O molecules and ions.
Owner:GIERTZ HANS
Low-shrinkage HIPS composite material for solving abnormal sound, and preparation method thereof
The invention discloses a low-shrinkage HIPS composite material for solving abnormal sound, and a preparation method thereof. The material comprises, by weight, 60-80 parts of HIPS resin, 3-10 parts of a rubber composite material, 8-20 parts of a reinforcing agent, 3-10 parts of a blocking agent, 0.3-1.5 parts of a weather-proof agent, 0.1-0.6 part of an antioxidant and 0.1-0.6 part of a lubricant. The material not only has excellent strength, toughness and dimensional stability, but also can play a role in vibration and noise reduction, can solve the common abnormal sound problem of current household appliances and improve the living environment of people, and is low in comprehensive cost and wide in application range.
Owner:合肥圆融新材料有限公司
Shockproof handheld sphygmomanometer
ActiveCN105147271AReduce resonance amplitudeImprove machining accuracyAngiographySphygmomanometerAirway structure
The invention relates to a handheld sphygmomanometer with a shockproof structure. The sphygmomanometer is characterized by comprising an upper shell, a lower shell, an inner shell component, a valve component, an inflation component, a pressurized ball jacket, an airway structure and a shockproof mechanism, wherein the inner shell component is arranged between the upper shell and the lower shell, the shockproof mechanism is arranged between the inner shell component and the upper shell as well as between the inner shell component and the lower shell, the valve component is arranged on the lower portions of the shells and connected with the inflation component through a thread, a sealing ring is arranged between the valve component and the inflation component, and the valve component and the inner shell component are communicated by the airway structure arranged therebetween. The shockproof handheld sphygmomanometer is ingenious in integral structure design, and the shockproof goal is achieved well through a damping principle.
Owner:HONSUN NANTONG
Eccentric block provided with movable counterweight block, vibrator and vibration screen
The invention discloses an eccentric block provided with a movable counterweight block. The eccentric block provided with the movable counterweight block comprises an eccentric block chassis, a movable counterweight block and a spring, wherein a similar involute rail for limiting the moving range of the movable counterweight block and supplying supporting force is arranged on the eccentric block chassis; the movable counterweight block is arranged in the similar involute rail and can reciprocate at a position close to the center of a main shaft and a position far away for the center of the main shaft along a route of a similar volute; a spring fixing seat is arranged on the eccentric block chassis; one end of the spring is connected to the movable counterweight block, and the other end ofthe spring is connected to the spring fixing seat. The eccentric block provided with the movable counterweight block is applicable to a vibrator and a vibration screen, and is small in rigidity and compression strength of the supplied spring; the structure is compact; the resonant vibration range of the vibrating screen is reduced while the vibrating screen moves through a resonance area during being started and stopped, and the dynamic load over the ground is reduced; surrounding components cannot be impacted due to wide vibration range, and a screening machine body is prevented from adverseinfluence.
Owner:南昌矿机集团股份有限公司
Vibration screen damping support
The invention provides a vibration screen damping support. The support comprises a machine body; the machine body comprises a hydraulic cavity; the hydraulic cavity contains hydraulic oil; a rubber piston is arranged inside the hydraulic cavity above the hydraulic oil; a push rod is arranged on the rubber piston; a rubber sealing lining is arranged at the top of the hydraulic cavity; and a first open groove is formed in the rubber sealing lining. The vibration screen damping support has the beneficial effects that: the structure of equipment is simple and operation is simple and convenient; shock of the equipment in the vertical direction can be reduced via action of the hydraulic cavity; high temperature of the hydraulic cavity caused by reciprocating motion is lowered via circulation ofcooling liquid; connecting rod mechanisms on the left side and the right side of the machine body are matched with air bags, so resonance amplitude of a vibration screen caused during initiation and shutdown is lower; and in an extreme status, the air bags below the machine body enable the machine body to sway, so damage to a hydraulic push rod is avoided. The matching is tight, and the integration degree is relatively high.
Owner:QINGDAO JUNPING DAMPING TECH CO LTD
Novel antitheft tag magnetic material, production process thereof and acoustic magnetic antitheft tag
ActiveCN102592771AEasy to useLow priceMagnetic materialsRecord carriers used with machinesRemanenceHeat treated
The invention relates to a novel antitheft tag magnetic material and a production process of the novel antitheft tag magnetic material, wherein the producing process comprises the steps of: adopting a cold-rolled steel plate and hot-rolling the cold-rolled steel plate to the thickness of 1+ / -0.2 mm; coating heat treatment protective paint which is 0.5+ / -0.05 mm in thickness and contains 1% of Nb on the surface of the hot-rolled steel plate; carrying out heat treatment on the hot-rolled steel plate which is coated with the heat treatment protective paint at the temperature of 850-900 DEG C; carrying out heat treatment at the temperature of 700-750 DEG C; and cooling. The invention also relates to an acoustic magnetic antitheft tag; a magnetic biasing piece is made from the novel antitheft tag magnetic material; and a resonant sheet is made from a microcrystal soft magnetic material. In the invention, stainless steel materials which are low in cost and can be produced in batch by stainless steel manufacture factories are taken as raw materials, so that the defect that the existing semi-hard magnetic materials are less in manufacture factory, long in ordering cycle and high in cost is solved; and as the novel antitheft tag magnetic material is a magnetic material with high coercive force and low residual magnetism, the structural design of the acoustic magnetic antitheft tag is simplified, and the manufacturing cost is greatly reduced.
Owner:CHANGZHOU MEISI KETE ELECTRONICS
Damping noise reduction structure and damping noise reduction method for control valve of automobile hydraulic power steering gear
PendingCN113071560AReduce resonance amplitudeReduce the frequency of rattling noisePower driven steeringPower steeringControl valves
The invention belongs to the technical field of automobile power steering gears, and particularly relates to an automobile hydraulic power steering gear control valve damping noise reduction structure and a damping noise reduction method thereof. The structure comprises a steering screw, a valve sleeve and a valve element assembly, the valve element assembly is inserted into a center hole of the steering screw, one end of the valve element assembly is connected with the steering screw, the valve sleeve is arranged at the other end of the valve element assembly in a sleeving mode and connected with the valve element assembly in a positioning mode, the outer surface of the valve sleeve is in running fit with the steering screw, a damping ring groove is formed in the valve sleeve, and a damping ring is contained in the damping ring groove. The damping ring groove is communicated with a high-pressure oil groove in the valve sleeve through an oil guide groove. The resonance amplitude of the steering control valve of the automobile hydraulic power steering gear is reduced, the abnormal sound frequency is reduced, and the assembly qualification rate is increased.
Owner:朝阳汽车转向器有限公司
Elastic lifting appliance
InactiveCN107010532ASimple structureReduce resonance amplitudeNon-rotating vibration suppressionLoad-engaging elementsLow noiseResonance amplitude
The invention relates to an elastic hanger, which includes lifting lugs, the lifting lugs are fixed on the fixing part through nuts, the fixing part is connected with a shock-absorbing spring device, a reinforcing rod is inserted in the shock-absorbing spring device, and the bottom of the reinforcing rod is provided with a first thread segment , a matching spreader frame is fixed on the first threaded section, a weighing device is arranged on the spreader frame, a matching connecting rod is provided at the end of the spreading frame, a second threaded section is provided at the top of the connecting rod, and the connecting rod Ends attach to hooks. The invention is simple in structure, stable and firm, adopts a shock-absorbing spring device, has small resonance amplitude, long life, and low noise. The weighing device can better display the lifting weight, avoid exceeding the acceptable range, wide application range, and can withstand high pressure , low cost, and increase comprehensive economic benefits.
Owner:MAANSHAN ZHONGTIAN MACHINERY INSTALLED
Power conversion apparatus with oscillation reduction control, oscillation reduction control module, and method of operating the same
ActiveUS11177740B1Rapidly and significantly decay amplitudeReduce resonance amplitudeEfficient power electronics conversionDc-dc conversionPower switchingDamper
A power conversion apparatus with oscillation reduction control supplies power to a load through an output end. The power conversion apparatus includes a transformer, a power switch, a control module, and an oscillation reduction control module. A primary side of the transformer receives an input voltage, and a secondary side of the transformer is coupled to the output end. The power switch is coupled to the primary side. The control module is coupled to the power switch, controls the power switch continuously turning on and turning off, and converts the input voltage into an output voltage. When the oscillation reduction control module detects a resonance voltage through the secondary side, the oscillation reduction control module performs an oscillation reduction operation to the resonance voltage to reduce an amplitude of the resonance voltage by a damper.
Owner:ASIAN POWER DEVICES
Method and device for playing audio
ActiveCN104021808BReduce resonance amplitudeImprove job stabilityUndesired vibrations/sounds insulation/absorptionOutput deviceComputers technology
Owner:LENOVO (BEIJING) LTD
A durable hinge
ActiveCN113323527BAvoid resistanceReduce shockBuilding braking devicesHingesClassical mechanicsMechanical elements
The invention discloses a durable hinge, which relates to the field of hinges, and comprises a detachably connected upper shell, a lower shell and a positioning block installed between the two. A cavity is arranged in the positioning block, and a Install a buffer mechanism and a driven rotation mechanism connected with the door, the buffer mechanism is used to reduce the rotation speed of the driven rotation mechanism, and a liquid circuit is also provided in the buffer mechanism, and the liquid circuit is used to improve the speed of the driven rotation mechanism The stability of the rotation, the present invention drives the buffer mechanism to move by setting the driven rotation mechanism, so that when the door rotates, it needs to overcome the resistance of the buffer block, slider, and spring, thereby decelerating and reducing the impact on the door and the door frame. A liquid circuit is set inside to reduce the resonance amplitude of each mechanical component in the device while further decelerating, improve the rotation stability of the driven rotating mechanism, reduce damage to the mechanical components, and prolong the service life of the device.
Owner:NANJING VOCATIONAL UNIV OF IND TECH
a buffer hinge
The invention discloses a buffer hinge, which relates to the field of hinges, and comprises a detachably connected upper shell, a lower shell and a positioning block installed between the two. A cavity is arranged in the positioning block, and a Install a buffer mechanism and a driven rotation mechanism connected with the door, the buffer mechanism is used to reduce the rotation speed of the driven rotation mechanism, and a liquid circuit is also provided in the buffer mechanism, and the liquid circuit is used to improve the speed of the driven rotation mechanism Rotational stability, the invention needs to overcome the resistance of the buffer block, slider, and spring when the door rotates, thereby reducing the speed and reducing the impact on the door and the door frame. By setting a liquid circuit in the buffer mechanism, no matter whether the door is opened or closed, The door still needs to overcome the resistance of the liquid during the rotation process, and at the same time of further deceleration, it helps to reduce the resonance amplitude of the mechanical components in the device, reduces the damage of the mechanical components, and prolongs the service life of the device. The device is easy to install and disassemble. Wide range of applications.
Owner:NANJING VOCATIONAL UNIV OF IND TECH
Method for preparing water sound absorption polymer composite material
InactiveCN110003639AImprove the sound absorption effect of water soundEasy to destroyZno nanoparticlesGlycerol
The invention relates to a method for preparing a water sound absorption polymer composite material and belongs to the technical field of ships. According to the method, the water sound absorption polymer composite material is prepared from modified nano zinc oxide and glycerol, because of modification of vinyl triethoxy silicon, nano zinc oxide has a great amount of hydroxyl on the surface, the glycerol and the modified nano zinc oxide with the hydroxyl are uniformly dispersed into a substrate, polar functional groups of polymer macromolecules, and the hydroxyl non the surface of the glyceroland the nano zinc oxide form a hydrogen bond network structure penetrating through the substrate, the hydrogen bond network structure is easily damaged and reformed under the action of an external force field and a temperature field, then a great deal of energy can be absorbed, very high mechanical consumption can be resulted, energy in sound waves can be effectively absorbed, and the water soundabsorption effect of a material can be improved.
Owner:于庭富
Gasket for improving resonance of vertical equipment
PendingCN112065902AQuick and small adjustment of natural frequencyIncrease dampingMachine framesLeaf springsEngineeringStructural engineering
The invention relates to a gasket for improving resonance of vertical equipment. The gasket can improve resonance on the premise of not changing an original installing structure so as to reduce equipment vibration. The gasket comprises a small gasket A, a small gasket B, a small gasket C and a large gasket, wherein the large gasket is annular and is provided with a plurality of circular bolt holes, the small gasket A, the small gasket B and the small gasket C are correspondingly arranged below the large gasket, the small gasket A, the small gasket B and the small gasket C are correspondingly apoint A, a point B, a point C, the point A, and the point B and the point C are positioned on a circle formed by circle centers of the bolt holes and cannot be positioned in bolt hole areas. According to the gasket, the resonance can be improved on the premise that the original installing structure is not changed, so that the equipment vibration is reduced.
Owner:CNNC FUJIAN FUQING NUCLEAR POWER
Sound absorbing and insulating barrier
ActiveCN100575610CReduced number of fatigue stress cyclesReduce the excitation forceNoise reduction constructionEngineering
The invention relates to a shield besides road to adsorb noise, which comprises a sound adsorption shield and a support frame, wherein the shield plate and the support frame or / and support frame and the base are connected via flexible element or / and damping element, the flexible element and the damping element can be serially, parallel or integrally connected. The invention can improve sound adsorption ability and protect the base, with long service life, less increase on the load of road, and high safety or the like.
Owner:QINGDAO CREATE ENVIRONMENT CONTROL TECH
Shockproof off-ground high-voltage switch cabinet mechanism
InactiveCN111969434AAchieve the effect of leaving the groundImprove stabilitySubstation/switching arrangement cooling/ventilationSubstation/switching arrangement casingsHydraulic cylinderStructural engineering
The invention discloses a shockproof off-ground type high-voltage switch cabinet mechanism. The mechanism comprises a bottom plate, the upper end of the bottom plate is fixedly connected with a shockproof layer; the top end of the shockproof layer is fixedly connected with a supporting plate; a first hydraulic cylinder is arranged on the supporting plate; a second hydraulic cylinder is arranged atthe corresponding position of the right side of the first hydraulic cylinder, a third hydraulic cylinder is arranged at the corresponding position of the rear side of the second hydraulic cylinder; afourth hydraulic cylinder is arranged at the corresponding position of the left side of the third hydraulic cylinder, a piston rod is arranged at the top end of the first hydraulic cylinder, a case is fixedly connected to the top end of the piston rod, the four corners of the case are fixedly connected to one ends of connecting rods, and the other ends of the connecting rods are fixedly connectedto telescopic rods. According to the cabinet mechanism, the shockproof effect of the whole mechanism is achieved by arranging the shockproof layer, a computer case can be lifted to a proper positionby arranging the hydraulic cylinder, ground moisture corrosion is prevented by arranging a ground-off mode, meanwhile, bottom surface heat dissipation is improved, and the computer case is worthy of vigorous popularization.
Owner:山东凯莱电气设备有限公司
A shockproof handheld blood pressure monitor
ActiveCN105147271BIngenious structural designPracticalAngiographySphygmomanometerMechanical engineering
The invention relates to a hand-held sphygmomanometer provided with an anti-shock structure, characterized in that the sphygmomanometer is provided with an upper casing, a lower casing, an inner casing assembly, a valve body assembly, an inflatable assembly, a pressurized ball sheath, an airway Structure and anti-shock mechanism, the inner shell assembly is arranged between the upper shell and the lower shell, an anti-shock mechanism is set between the inner shell assembly, the upper shell, and the lower shell, and the lower part of the shell is provided with a valve The valve body assembly is connected to the inflatable assembly through threads, a sealing ring is provided between the valve body assembly and the inflatable assembly, and an air passage structure is provided between the valve body assembly and the inner shell assembly to communicate. The overall structural design of the technical solution is ingenious, and the purpose of shock resistance is well achieved through the principle of damping and shock absorption.
Owner:HONSUN NANTONG
Method for assembling gearbox components
The invention relates to a centrifugal mass (1) of a change-speed gearbox of a motor vehicle, comprising a coupling means (7) for connecting the centrifugal mass (1) to a selector shaft and a cantilever (2) to a switching mass (4), which is arranged at the radially protruding end (5) of the cantilever (2). The cantilever (2) is made of a material that is lighter than the switching mass (4).
Owner:SCHAEFFLER TECH AG & CO KG
Rotary mass and shifting equipment of motor vehicle transmission
The invention relates to a centrifugal mass (1) of a change-speed gearbox of a motor vehicle, comprising a coupling means (7) for connecting the centrifugal mass (1) to a selector shaft and a cantilever (2) to a switching mass (4), which is arranged at the radially protruding end (5) of the cantilever (2). The cantilever (2) is made of a material that is lighter than the switching mass (4).
Owner:SCHAEFFLER TECH AG & CO KG
Durable hinge
ActiveCN113323527AReduce shockReduce resonance amplitudeBuilding braking devicesHingesPhysicsMechanical elements
The invention discloses a durable hinge, and relates to the field of hinges. The durable hinge comprises an upper shell, a lower shell and a positioning block, wherein the upper shell and the lower shell are detachably connected, and the positioning block is arranged between the upper shell and the lower shell; a cavity is formed in the positioning block, a buffer mechanism and a driven rotating mechanism connected with a door are arranged in the cavity, the buffer mechanism is used for reducing the rotating speed of the driven rotating mechanism, a liquid loop is further arranged in the buffer mechanism, and the liquid loop is used for improving the rotating stability of the driven rotating mechanism. According to the durable hinge, the driven rotating mechanism is arranged to drive the buffer mechanism to move, so that the resistance of a buffer block, a sliding block and a spring needs to be overcome when the door rotates, then the speed is reduced, and the impact on the door and a door frame is reduced; and the liquid loop is arranged in the buffer mechanism, so that the resonance amplitude of each mechanical element in the device is reduced while the speed is further reduced, the rotating stability of the driven rotating mechanism is improved, the damage of the mechanical elements is reduced, and the service life of the device is prolonged.
Owner:NANJING VOCATIONAL UNIV OF IND TECH
Novel antitheft tag magnetic material, production process thereof and acoustic magnetic antitheft tag
ActiveCN102592771BEasy to useLow priceMagnetic materialsRecord carriers used with machinesRemanenceHeat treated
Owner:CHANGZHOU MEISI KETE ELECTRONICS
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