Product
Feature
Quick Research
Generate reliable direction feasibility study reports for your R&D in just a few steps.
Technical Q&A
Discover and master advanced knowledge NOW. Basics, ideas, possibilities, all at once.
Find Solutions
As an expert in R&D theories, this can generate solutions to your technical problems instantly.
Evaluate Feasibility
Analyze your overall solution with one click, know your potential R&D risks in advance.
Monitor Landscape
Get weekly tech updates, stay abreast of the latest tech innovations and key insights.
Patents
Literature
Hiro is an intelligent assistant for R&D personnel, combined with Patent DNA, to facilitate innovative research.
125results about How to "Achieve stiffness" patented technology
Efficacy Topic
Property
Owner
Technical Advancement
Application Domain
Technology Topic
Technology Field Word
Patent Country/Region
Patent Type
Patent Status
Application Year
Inventor
Rotating type rigidity-changing flexible joint
ActiveCN104608142AAchieve stiffnessVariable stiffness flexible joint with compact sizeJointsOptical axisEngineering
The invention discloses a rotating type rigidity-changing flexible joint which comprises a driven rigidity-changing mechanism and a driving flexible drive mechanism. The rotating type rigidity-changing flexible joint is characterized in that the driven rigidity-changing mechanism mainly comprises an output plate of the joint, a first drive plate of the joint, a second drive plate of the joint, a first cam set, a second cam set, a first cam set installing base, a second cam set installing base, a bare shaft, a supporting base of the bare shaft, a rigidity adjusting installing plate, a linear bearing and a spring. The first drive plate of the joint is fixedly connected with the second drive plate of the joint. The second drive plate of the joint and the output plate of the joint are provided with cam grooves with the same outline. By means of the outlines, the equivalent rigidity of the joint can change along with the flexible deformation angle of the joint. Cams of the first cam set and the second cam set can make contact with the second drive plate and the output plate of the joint at the same time. The driving flexible drive mechanism mainly comprises a trapezoidal lead screw, a lead screw supporting base, a lead screw nut, a lead screw bearing, a direct-current servo motor, a motor installing base, a coupler, a rigidity-changing adjusting base, a linear bearing and a spring.
Owner:HEBEI UNIV OF TECH
Permanent-magnet type eddy current tuned mass damper
ActiveCN101761146APrecise linear motionStructural damping dropBridge structural detailsTowersStress concentrationElectricity
The invention relates to a permanent-magnet type eddy current tuned mass damper which comprises a steel magnetic-conducting baseplate (10), wherein end plates (3) are respectively arranged at two ends of the baseplate (10). The permanent-magnet type eddy current tuned mass damper is characterized by also comprising a circular shaft (4) and a linear bearing seat (5), wherein two ends of the circular shaft (4) are respectively arranged on the corresponding end plates (3), and the linear bearing seat (5) is sleeved on the circular shaft (4) and can slide on the circular shaft (4); the lower part of the bearing seat (5) is connected with a mass block (6), and two ends of the mass block (6) are respectively connected with the corresponding end plates (3) through spiral springs (7); the lower part of the mass block (6) is connected with a permanent magnet (13), and a copper plate (12) is arranged below the permanent magnet (13) and connected with the baseplate (12) through a cushion block (11). By adopting an eddy current damping model with special design, the permanent-magnet type eddy current tuned mass damper realizes the damping adjustability of the damper in a larger range, realizes the complete separation between the system rigidity and the damper, and cancels the mechanical friction energy consumption and stress concentration elements, thereby avoiding the common TMD damage failure.
Owner:湖南省潇振工程科技有限公司 +1
Turnout zone and non-turnout zone transition section structure for medium and low-speed magnetic levitation low implantation line
The invention discloses a turnout zone and non-turnout zone transition section structure for a medium and low speed magnetic levitation low implantation line. The transition section structure comprises non-turnout zone reinforced concrete rafts, turnout zone reinforced concrete rafts, reinforced concrete turnout beam strip foundation, composite foundation of a plurality of rigid piles, a plurality of reinforced concrete cast-in-situ bored piles, a non-turnout zone bearing-trail beam, boss stoppers, a non-turnout zone bearing-trail beam overlapping platform, a non-turnout zone bearing-trail beam lower trapezoidal fill body, a low implantation line bearing-trail beam lower foundation and a non-turnout zone bearing-trail beam outside subgrade filling. According to the transition section structure disclosed by the invention, the condition that extremely large deformation of the turnout beam is caused in the rotating process due to insufficient stiffness of the foundation can be avoided, and the requirements of the turnout beam on the basement strength and stability of the foundation are met.
Owner:CHINA RAILWAY SIYUAN SURVEY & DESIGN GRP
Nested annular MEMS oscillation gyro with period distribution type concentrated mass blocks
ActiveCN104976996AQuality improvementAchieve stiffnessSpeed measurement using gyroscopic effectsGyroscopes/turn-sensitive devicesCapacitanceResonance oscillation
The invention provides a nested annular MEMS oscillation gyro with period distribution type concentrated mass blocks. The gyro comprises a nested annular harmonic oscillator with the period distribution type concentrated mass blocks, and an electrode which is arranged inside / outside the nested annular harmonic oscillator; the nested annular harmonic oscillator comprises a nested annular flexible frame, the mass blocks arranged on the nested annular flexible frame, and anchors for fixing the oscillator; the whole harmonic oscillator is fixedly anchored with a base by the anchor on the center of the harmonic oscillator; the nested annular flexible frame comprises nested rings and spoke-shaped supporting beams; the mass blocks can be additionally arranged on the nested annular flexible frame in a plurality of kinds of manners; and the electrode can be arranged inside / outside the harmonic oscillator, or the electrodes are arranged inside and outside the harmonic oscillator. The gyro has the relatively high thermo-elastic property Q value, relatively large resonance oscillation mass, and relatively large driving amplitude; and as the design of the internal electrode is adopted or the design of the internal and external electrodes is adopted, the gyro also has the advantages that the capacitance detection area is large, the number of detection and control electrodes is large and the like.
Owner:NAT UNIV OF DEFENSE TECH
Parallel-connection liquid-electricity feed suspension system
ActiveCN104373497AMeet special performance needsStable speedSpringsLiquid based dampersElectricityVehicle frame
The invention relates to a parallel-connection liquid-electricity feed suspension system. The system is composed of a plurality of hydraulic actuation cylinder modules (1), a liquid-electricity energy conversion module (31) and a control and energy storage module (28), wherein the hydraulic actuation cylinder modules are in parallel connection with the liquid-electricity energy conversion module (31) and the control and energy storage module (28), and each hydraulic actuation cylinder module is matched with an elastic element to form a suspension sub system used for being connected with a wheel and a frame. Vibration energy caused by bumpiness of a road surface can be partly converted into electricity, and damping force needed by the system and used for attenuating vibration is supplied by reverse electrodynamic force generated when a power generator works. Accordingly, the suspension system can be actively or semi-actively controlled by controlling the work condition of the power generator. Meanwhile, damping force of the suspension sub systems of a vehicle can be transmitted by means of hydraulic pipelines, dynamic control of the posture of a vehicle body can be achieved by being matched with corresponding control strategies, and accordingly operation stability and driving comfort of the vehicle are better.
Owner:WUHAN UNIV OF TECH +1
Method for refining crystal grains of magnesium alloy plate
InactiveCN101985729AImprove strength and plasticityIncrease productivityAlloy elementMagnesium alloy
The invention relates to a method for refining crystal grains of a magnesium alloy plate, in particular to a preparation method for refining the crystal grains of the magnesium alloy plate by a circular cold rolling-annealing method. In the method, the magnesium alloy plate with refined crystal grains is obtained by repeatedly circulating cold rolling deformation and annealing according to such a rule that next cold rolling deformation is more than previous deformation and next annealing temperature is lower than the previous processing temperature, wherein the magnesium alloy plate comprises 0.1 to 10 weight percent of alloy element; and the size of the crystal grains of the magnesium alloy plate is greatly refined through several cold rolling deformation and annealing processes. The method is low in cost and simple in operation, can be used for mass production and is a method for economically and effectively preparing the magnesium alloy plate; and the magnesium alloy plate prepared by the method has the characteristics of low cost, high strength and plasticity and the like, and can be widely applied to various fields such as automobiles, aviation, communication, buildings and the like.
Owner:CHONGQING UNIV
Method, fastening system and auxiliary apparatus for fastening a first component to a second component with a precise separation
InactiveUS20060193714A1Large separationEasy to manufactureWashersSheet joiningSoftware engineeringWasher
The present invention concerns a fastening system for fastening a first component to a second component with a precise separation. The present invention also concerns a method for fastening the first component to the second component with a precise separation, as well as an auxiliary apparatus for attaching the fastening system to the second component in order to place the first component on the fastening system. Preferably, the stud has an external thread and the support washer has a threaded hole matched to the external thread, so the support washer can be screwed onto the stud.
Owner:NEWFREY
Robot joint reducer test bed
ActiveCN104897400AConvenient researchReduce energy consumptionMachine gearing/transmission testingAutomatic controlControl system
The invention discloses a robot joint reducer test bed. The robot joint reducer test bed is characterized by comprising a driving motor, a measured robot joint reducer, a loader, an output tray, a torsion spring, a turntable device, an angle sensor and a control system, the turntable device applies an initial turning angle on the torsion spring, the output tray applies torque to the measured reducer, the driving motor drives the measured reducer to rotate, the loader applies radial force on the measured reducer, and input and output test parameters of the measured reducer are respectively acquired by the aid of a sensor and the angle sensor. Real working conditions of the robot joint reducer can be simulated, experimental reliability is increased, energy consumption is reduced, and automatic control performance is improved.
Owner:HEFEI UNIV OF TECH +1
Underactuated variable-stiffness manipulator based on variable-stiffness elastic joints
PendingCN108748254AImprove gripImprove response speedJointsGripping headsVariable stiffnessSacroiliac joint
The invention provides an underactuated variable-stiffness manipulator based on variable-stiffness elastic joints, relates to a variable-stiffness manipulator, and aims to solve the problem about application limitations of a stiff manipulator and a flexible manipulator in the prior art. The underactuated variable-stiffness manipulator comprises the three variable-stiffness elastic joints, and further comprises a palm, a motor, a base, supporting columns and three fingers, wherein the three fingers comprise one flexion-extension finger and two coupling rotary flexion-extension fingers; the palmis arranged above the base; the palm and the base are connected through the supporting columns; the vertically-arranged motor and the three variable-stiffness elastic joints are mounted on the base;the flexion-extension finger and the two coupling rotary flexion-extension fingers are arranged on the palm along the circumferential direction of the palm; through a steel wire rope, the two couplingrotary flexion-extension fingers are driven by an output shaft of the motor to perform rotary motion; output shafts of the three variable-stiffness elastic joints are arranged in a one-to-one correspondence manner; and the flexion-extension motion of the flexion-extension finger and that of the two coupling rotary flexion-extension fingers are driven through the steel wire rope. The underactuatedvariable-stiffness manipulator provided by the invention belongs to the field of robots.
Owner:HARBIN INST OF TECH
Test bed and method for testing high-frequency mechanical characteristic of tire
InactiveCN104458286AAchieve stiffnessAchieve uniformityVehicle tyre testingRoad surfaceControl valves
The invention relates to a test bed and a method for testing the high-frequency mechanical characteristic of a tire. The test bed comprises a simulation road surface rack assembly composed of a bottom plate, a lower box body, a shaft base and an upper box body, a simulation road surface assembly composed of a high-rigidity drum, a main shaft, a driven belt pulley, a synchronous belt pulley, a speed measuring assembly and road surface protruding blocks, a drive mechanism assembly composed of a motor base, a motor plate, a servo motor, a drive belt pulley and an air blower, a transmission toothed belt, a wheel cover, a tire positioning assembly composed of a positioning support and an installing plate assembly, and a tire inflating and deflating mechanism assembly composed of an air pipe, a tire pressure control valve and an air pump, and the transmission toothed belt and the wheel cover are arranged between the drive belt pulley and the driven belt pulley. The test method comprises the steps that a deflated tire is installed on the positioning support and pressed on the outer surface of the high-rigidity drum, the tire is inflated to be vertically loaded, and the different road surface protruding blocks are installed on the high-rigidity drum to carry out the test and collect data. The test bed and the method are suitable for testing and modeling of the high-frequency mechanical characteristic of the tire.
Owner:JILIN UNIV
Electromagnetic driving two-degrees of freedom spherical robot wrist and control method thereof
ActiveCN111604935AEasy to adjustNested compactProgramme-controlled manipulatorJointsResponse sensitivityEngineering
The invention belongs to the technical field of automation engineering and relates to an electromagnetic driving two-degrees of freedom spherical robot wrist and a control method thereof. The electromagnetic driving two-degrees of freedom spherical robot wrist is a high-integration driving spherical wrist device, the two output ends of an internal universal joint and an external universal joint passing through the same rotating center are coaxially connected, and a radial magnetizing permanent magnet in a servo mechanism is directly driven by a coaxial servo magnetic moment in a space universal rotary magnetic field to realize side-sway and pitching two-degrees of freedom rotation. The electromagnetic driving two-degrees of freedom spherical robot wrist overcomes the defects of a complicated driving machinery wrist, the wrist driving system is simple and light in structure, high in transmission efficiency, static and dynamic performance and control and response speed, can solve the modeling problem of the existing spherical electromagnetic driving joint three-dimensional complicated magnetic field, realize precise modeling of the spherical electromagnetic driving joint magnetic field and precise decoupling of electromagnetic coupling and mechanical coupling, and remarkably improves the response sensitivity and positioning precision of electromagnetic driving spherical joint control.
Owner:DALIAN UNIV OF TECH
Anti-collision method of ship made of composite materials and hull structure
ActiveCN101898621AImprove protectionImprove rigidityVessel cleaningHull partsHull structureMarine engineering
The invention discloses an anti-collision method of a ship made of composite materials and a hull structure. The invention is mainly characterized in that sandwich plates (12) made of the composite materials are used as the outer walls of the hull, an integrated anti-collision bulwark (1) is adopted, the hull is in a 'cage type' structure, annular reinforced ribs are arranged on the side surfaces of the hull, and an energy-absorbing bow is adopted. The hull structure has the characteristics of light weight and high strength, and simultaneously, the overall anti-collision performance of the ship made of the composite materials is effectively improved through the comprehensive anti-collision structure design. When the ship has a collision on a front surface or a side surface, the comprehensive passive safety protection hull structure provided by the invention can effectively buffer an impact force caused by the collision of the ship, has good energy-absorbing effect and strong anti-deformation capacity, and is favorable for preventing or reducing casualties and property loss caused by the collision of the ship. The invention is especially suitable for the anti-collision design of the ship made of composite materials and has better application and popularization prospects.
Owner:SHENZHEN HISPEED BOATS TECH
Tail end Cartesian space rigidity modeling method for rope-driven linkage mechanical arm
ActiveCN109249428AAchieve stiffnessEasy to controlProgramme-controlled manipulatorVirtual workEngineering
The invention discloses a tail end Cartesian space rigidity modeling method for rope-driven linkage mechanical arm. The method includes: calculating integral joint equivalent rigidity of a mechanicalarm linkage rope, calculating according to a velocity-stage kinematic relation between a driving rope and a mechanical arm joint to obtain a Jacobian matrix Gq from a joint space to a driving space, acquiring integral joint equivalent rigidity of the driving rope of the mechanical arm according to a virtual work principle and a variational principle, and calculating mechanical arm joint equivalentrigidity Kq; calculating according to a velocity-stage kinematic relation between a mechanical arm joint variable and a tail end pose to obtain a Jacobian matrix Jq from the joint space to the tail end Cartesian space, and acquiring an equivalent rigidity Ke, in the tail end Cartesian space, of the mechanical arm joint equivalent rigidity Kq according to the virtual work principle and the variational principle. Rigidity analysis and control of the rope-driven linkage mechanical arm can be realized, and the method can be applied to rigidity analysis, statics analysis, force control and the like of the rope-driven linkage mechanical arm.
Owner:SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
Large-travel active adjusting damper of SMA wire split sleeve
ActiveCN106989131AIncrease dampingImprove energy consumptionSpringsNon-rotating vibration suppressionVibration amplitudeAlloy
The invention provides a large-travel active adjusting damper of a SMA wire split sleeve. The large-travel active adjusting damper of the SMA wire split sleeve comprises a split sleeve, a super-elasticity SMA wire, a piston, two external bolts, two damping rings and a mounting frame; the inner wall of the split sleeve is a periodic diameter change cylindrical surface, and is complementary with the outer wall of the piston in shape; two ends of the piston are connected with the external bolts for connecting the damper with other parts; two sides of the piston are respectively provided with one damping ring; and the super-elasticity SMA wire is uniformly wound on the insulation outer wall surface of the split sleeve. The large-travel active adjusting damper of the SMA wire split sleeve fuses the material damping of a super-elasticity memory alloy, the dry friction damping and the damping ring damping to improve the vibration reducing performance, uses the structure of the periodic friction surface to enable once travel of the damper to include multiple loading and unloading processes of the super-elasticity SMA wire to effectively increase the vibration amplitude borne by the damper, can realize self-adaption rigidity and damping adjusting functions through control of the SMA wire, prevents the failure problem of a sealing piece, and is long in service life, wide in application range and high in reliability.
Owner:BEIHANG UNIV
Variable-rigidity omnidirectional motion soft driver based on line interference technology
ActiveCN111055299ARealize telescopic movementAchieve omnidirectional movementGripping headsEngineeringMechanical engineering
The invention discloses a variable-rigidity omnidirectional motion soft driver based on a line interference technology. The variable-rigidity omnidirectional motion soft driver based on the line interference technology comprises a corrugated expansion pipe, a hose, nylon filaments, a first air pipe, a second air pipe and a torsion limiting line; the hose is coaxially sleeved with the corrugated expansion pipe, and a first cavity is formed between the hose and the corrugated expansion pipe; the interior of the hose is equally divided into a plurality of second cavities in the axial direction; the nylon filaments are coaxially filled in the second cavities; the first air pipe communicates with the first cavity; the second air pipe communicates with the second cavities; and the torsion limiting line is detachably connected to the outer wall of the corrugated expansion pipe. According to the variable-rigidity omnidirectional motion soft driver based on the line interference technology, theexpansion and contraction movement of the corrugated expansion pipe is realized by inflating or exhausting air in the first cavity, the torsion movement is realized by the torsion limiting line, thebending direction and the rigidity of the corrugated expansion pipe are controlled by matching of the hose and the nylon filaments, the designed soft driver has various movement modes and adjustable rigidity, and the functions of grabbing, clamping and the like of objects can be well realized.
Owner:HEFEI WISDOM DRAGON MACHINERY DESIGN CO LTD
Rigidity adjusting device for spiral springs and tuned mass damping device
ActiveCN103925331ASimple structureEasy to obtainNon-rotating vibration suppressionCoil springEngineering
Owner:CHINA AVIATION PLANNING & DESIGN INST GRP
Ultralow-frequency and shock-resistance metamaterial vibration isolating device
ActiveCN105650180ANo "degumming" phenomenonAchieve impedanceSpringsNon-rotating vibration suppressionShock resistanceEngineering
The invention belongs to the technical field of vibration reduction and noise reduction, and in particular, relates to a metamaterial vibration isolating technology. A ultralow-frequency and shock-resistance metamaterial vibration isolating device comprises a metamaterial vibration isolating part (1), a lower positioning cover (2), an upper positioning cover (3), an inner limiting shell (4), an outer limiting shell (5), a lower bolt set (6) and an upper bolt set (7). The ultralow-frequency and shock-resistance metamaterial vibration isolating device theoretically can realize any low frequency range, so that the metamaterial vibration isolating device can bear higher static load on an online elastic deformation section, and can realize ultralow-frequency vibration isolating effect of a vibration isolating system on a ultralow-frequency vibration isolating section; and the metamaterial vibration isolating device is high in shock resistance, and can improve the safety of the vibration isolating system. The metamaterial vibration isolating part is not limited by a base material, so that the adaptability is wide.
Owner:WUHAN SECOND SHIP DESIGN & RES INST
Eccentric eddy current tuned mass damping device
ActiveCN103775549AAchieve regulationNo friction lossMagnetic springsBridge structural detailsElectricityVibration attenuation
The invention belongs to the technical field of building structure vibration attenuation, and particularly relates to a tuned mass damping device utilizing eddy current for providing damping. The tuned mass damping device comprises a conductor plate and a permanent magnet, and is characterized by also comprising a main shaft, a spring and an eccentric mass block, wherein the eccentric mass block is fixedly arranged on the main shaft, or a rotating bearing is arranged between the eccentric mass block and the main shaft, one end of the spring is connected with the eccentric mass block, the conductor plate is fixedly arranged at one side of the eccentric mass block in a direction vertical to an axle line of the main shaft, the permanent magnet is positioned between the conductor plate and the eccentric mass block and is fixedly arranged on the eccentric mass block, a gap is formed between the conductor plate and the permanent magnet, and the conductor plate, the permanent magnet, the main shaft, the spring and the eccentric mass block jointly form a group of eddy current tuned mass damping structures. The eccentric eddy current tuned mass damping device has the advantages that the structure is simple, the practicability is high, safety and reliability are realized, the cost performance is higher, the tuned mass damping device can be widely applied to structure vibration control of various high-rise and super high-rise buildings, drawn-up structures or long-span buildings, and the market application prospects are very wide.
Owner:QINGDAO CREATE ENVIRONMENT CONTROL TECH +1
Construction method for spacing suspension cable structural template support platform
InactiveCN101503908AFully reflect the economic characteristicsEnsure space safety and reliabilityBuilding support scaffoldsEngineeringSteel bar
The invention discloses a method for constructing a template supporting platform with a spatial span wire structure, which comprises the following steps that: the mounting of a cantilever platform, the mounting of a central rigid annular cylinder, the mounting of a thread steel bar bearing cable, the mounting of a simple truss, the mounting of a lateral strut on the simple truss and a steel ring strut on the central rigid annular cylinder and the like. The built template supporting platform with the spatial span wire structure has a reasonable structure, convenient construction and good effect.
Owner:南通建工集团股份有限公司
Test device for stiffness of flexible spring
ActiveCN102175534AEasy to measureAchieve installationMaterial strength using tensile/compressive forcesEngineeringMechanical engineering
Owner:江苏热声机电科技有限公司
Spunlaced nonwovens and machining method for composite fiber curtain filtration
The invention discloses spunlaced nonwovens and a machining method for composite fiber curtain filtration. According to the method, copet composite fiber, whitening polyester fiber and superfine polyester fiber in the weight proportion 1.5: 2.5:1 are subjected to the following steps to form the spunlaced nonwovens, 1, the copet composite fiber, the whitening polyester fiber and the superfine polyester fiber are mixed in the weight proportion 1.5: 2.5:1; 2, the mixed material is conveyed to an air pressure cotton box carding machine through a draught fan after being subjected to mixing opening; 3, the mixed fiber is subjected to carding to form a mesh, and the mesh is conveyed to a spunlace machine; 4, spunlace machining is conducted on the mixed fiber on a spunlace machine; 5, dehydration treatment is conducted; 6, the mixed fiber is transferred to a dryer to be subjected to continuous drying solidification after the spunlace machining, the solidification temperature of a first drying oven is 160+-3 DEG C, the solidification temperature of a second drying oven is 170+-3 DEG C, and the speed is 45-50 m / min; 7, calendering finish is conducted; 8, the working procedures of slitting and packaging are conducted. The spunlaced nonwovens and machining method for the composite fiber curtain filtration has the advantages that the effects of printing and dyeing, bending and polishing are achieved, no sizing agent exists, and the cost is low.
Owner:SHANDONG PROVINCE WINSON NON WOVEN MATERIALS
Comprehensive measurement device and method for bearing rigidity and starting friction torque
ActiveCN106525424AAchieve stiffnessAchieve frictionMachine bearings testingForce sensorsFriction torqueMeasurement device
The invention discloses a comprehensive measurement device for bearing rigidity and starting friction torque, including a driving shaft, an inner axial pressure conduction block, an outer axial pressure conduction block, a pressure sensor and locking nuts. The driving shaft comprises a first step, a second step which is used for clamping a bearing, a testing end and a fastening end, and the testing end and the fastening end are provided with outer threads. The inner axial pressure conduction block is sleeved on the first step and is provided with a groove. The outer axial pressure conduction block is provided with a projection cooperated with the groove. The pressure sensor is sleeved on the driving shaft, and the end surface of the pressure sensor is adhered to the end surface of the inner axial pressure conduction block. The locking nuts are fixedly connected at two ends of the driving shaft respectively. The comprehensive measurement device for bearing rigidity and starting friction torque obtains the pretightening force, rigidity and starting friction torque of a single bearing or bearings in pair with one measurement device.
Owner:ANHUI JIANGHUAI AUTOMOBILE GRP CORP LTD
Analyzing method of time-varying mesh stiffness of single roller enveloping worm gear pair
ActiveCN107247856ABending stiffness achievedAchieve stiffnessGeometric CADPortable liftingShear stiffnessRadial compression
The invention provides an analyzing method of time-varying mesh stiffness of a single roller enveloping worm gear pair and aims to acquire the time-varying mesh stiffness of the single roller enveloping worm gear pair. The method includes: deducing worm tooth bending stiffness, shear stiffness and radial compression stiffness formulas; calculating worm tooth base stiffness; calculating worm gear tooth bending stiffness and shear stiffness; calculating worm gear tooth base stiffness; calculating worm stiffness and worm gear stiffness at a disperse contact point; calculating contact stiffness; performing serial and parallel calculation on the worm stiffness, the worm gear stiffness and the contact stiffness; calculating the time-varying mesh stiffness. The method has the advantages that the time-varying mesh stiffness of the single roller enveloping worm gear pair can be calculated, the worm gear stiffness and the worm stiffness can be further decomposed, the worm tooth bending stiffness, shear stiffness and radial compression stiffness formulas are provided, a calculation model of the number of meshing worm gear teeth in a mesh cycle is provided, and the method is applicable to the dynamic performance analysis and optimization design of the single roller enveloping worm gear pair.
Owner:西安启工数据科技有限公司
Composite elasticity and damping shock resistance shock absorber of gas turbine device
PendingCN108468737AAchieve modularityAchieve controllabilityHigh internal friction springsShock absorbersRubber ringUnderwater explosion
The invention belongs to the technical field of gas turbine equipment and particularly relates to a composite elasticity and damping shock resistance shock absorber of a gas turbine device. The shockabsorber comprises a mounting screw rod, a shock absorber upper cover, a shock absorber base, and integrally vulcanized main body rubber between the shock absorber upper cover and the shock absorber base; a height adjusting nut is arranged at the top of the shock absorber upper cover; a fastening locking screw is arranged on the side face of the height adjusting nut; a middle threaded hole columnand symmetrical lateral threaded hole columns are arranged on the shock absorber upper cover; a transverse isolating block and a middle rubber buffer block are arranged in the shock absorber base; a central isolating rubber ring and symmetrical lateral isolating rubber rings are arranged above the transverse isolating block; the middle threaded hole column is in threaded connection with a centralscrew rod; the lateral threaded hole columns are in threaded connection with a lateral screw rod; and a bottom buffer metal steel wire gauze pad, a belleville spring and a bottom compression resistance rubber pad are sequentially arranged below each of the central screw rod and the lateral screw rod. The shock absorber is used for realizing vibration isolation and underwater explosion impact resistance of the gas turbine device.
Owner:中国船舶重工集团公司第七0三研究所
Collaborative robot nonlinear stiffness modeling method
PendingCN112949103AAchieve stiffnessIncrease stiffnessGeometric CADDesign optimisation/simulationSimulationRigidity matrix
The invention relates to the field of collaborative robots, in particular to a nonlinear stiffness modeling method for a collaborative robot, which comprises the following steps: step 1, robot module comprehensive stiffness modeling: splitting a robot into a plurality of modules, obtaining a structural stiffness matrix of each module, and then carrying out nonlinear modeling on a robot transmission system, the overall comprehensive rigidity of the robot is the sum of the comprehensive rigidity of all the modules, a connecting rod module comprehensive rigidity matrix is a structural rigidity matrix, and a joint module rigidity matrix is synthesized by the structural rigidity matrix and the nonlinear rigidity of the robot transmission system; step 2, robot static balance modeling: flexible deformation of each module is represented by adding virtual joints, and a robot static balance model under load and self-weight conditions is established; and step 3, robot nonlinear stiffness modeling. According to the method, finite element and virtual joint stiffness modeling methods are combined, and the overall stiffness and positioning precision of the robot can be improved.
Owner:SHENYANG INST OF AUTOMATION - CHINESE ACAD OF SCI
Manufacture method of novel non-woven banner fabric
The invention discloses a manufacture method of a novel non-woven banner fabric. The non-woven banner fabric is prepared by using 5-10wt% of polypropylene fibers and 90-95wt% of polyester fiber as rawmaterials and processing the raw materials by an opening and mixing working procedure, a feeding working procedure, a combing working procedure, a lapping working procedure, a prickling working procedure and a hot rolling working procedure, After the technical scheme is adopted, the non-woven banner fabric manufactured by the method has the advantages of stiffness controllability, good folding resistance and fold recovery performance and high safe use performance.
Owner:福建鑫华股份有限公司
Magnetic suspension type quasi-zero stiffness electromagnetic vibration isolator with active negative stiffness
ActiveCN112696454AImprove carrying capacityPrevent complex dynamic phenomena such as jumpingVibration dampersNon-rotating vibration suppressionVibration controlIsolator
The invention relates to a magnetic suspension type quasi-zero stiffness electromagnetic vibration isolator with active negative stiffness. The invention relates to the technical field of vibration control, and a passive negative stiffness and an active negative stiffness can be selectively realized by adjusting the control mode of a controller. By the adoption of an amplifying mechanism and a DIESOLE type electromagnet, the bearing capacity of the vibration isolator is further improved, and the vibration isolator is suitable for the field of ultra-low-frequency heavy-load vibration reduction and isolation. According to the vibration isolator, the displacement state of the negative stiffness mechanism can be measured in real time according to a sensor, the active negative stiffness and the real-time linear negative stiffness are achieved under the cooperation of the controller and a driver, the multistable phenomenon is avoided, and the vibration isolator is prevented from jumping and other complex dynamic phenomena in the working process. The active negative stiffness is achieved, the current passing through the system can be adjusted according to different working conditions, and the system is high in self-adaptive capacity, can be suitable for objects different in mass and subjected to vibration isolation and can adapt to different working environments.
Owner:HARBIN ENG UNIV
Tuning mass damping device
A tuning mass damping device comprises a section bar, a plate spring, mass blocks arranged at two ends of the plate spring and a damping portion. The section bar is provided with a web and fixed on a structural member to be damped or forms a part of the structural member to be damped. The plate spring penetrates the web of the section bar along the horizontal direction and is arranged symmetrically with the web as the symmetry center. One end of the damping portion is linked to a corresponding mass block in the vertical moving direction of the mass block, and the other end of the damping portion is fixedly connected with the structural member to be damped. The tuning mass damping device further comprises a rigidity limiting portion for limiting the free length of elastic moving of the plate spring in the vertical direction. By means of the device, section steel beam height space can be used effectively, requirements for building clear height are reduced, use rate of a building space is improved, and applicability of the damping device is improved.
Owner:CHINA AVIATION PLANNING & DESIGN INST GRP
Multi-cascade phononic crystal vibration isolator
PendingCN112726297AAchieve vibration isolationOptimal Design StructureNon-rotating vibration suppressionRailway tracksPhotonic crystalIsolator
According to a multi-cascade phononic crystal vibration isolator, phononic crystal cells are arranged in the multi-cascade phononic crystal vibration isolator, a band gap within the frequency band range of 50 Hz to 200 Hz and 1000 Hz to 2000 Hz is generated, vibration of a specific frequency band is eliminated through the band gap, and therefore vibration reduction of a track is achieved, the multi-cascade phononic crystal vibration isolator is of a cylindrical structure and is divided into a vibration isolator outer cylinder structure and a vibration isolator inner cylinder structure; the vibration isolator inner cylinder structure is composed of an inner cylinder and a multi-cascade photonic crystal vibration isolator main body structure, the multi-cascade photonic crystal vibration isolator main body structure is placed in the inner cylinder and is formed by combining a plurality of photonic crystal cells and a bearing top plate, and each cell is composed of a mass element and an elastic element. Characteristics of the circumferential elastic element are brought into full play, and parameter optimization design is facilitated; the isolator has the advantages of being convenient to install, good in compatibility with an outer cylinder and an inner cylinder of an existing floating slab vibration isolator and the like, and has wide applicability in the field of rail transit vibration and noise reduction.
Owner:TONGJI UNIV +1
Large-stroke high-sensitivity turning tool nose height precision adjustment device
PendingCN108672729AImprove rigidityHigh precisionAuxillary equipmentTool holdersMicron scaleImage resolution
The invention discloses a large-stroke high-sensitivity turning tool nose height precision adjustment device. The large-stroke high-sensitivity turning tool nose height precision adjustment device iscomposed of a foundation support, a moving mechanism (dovetail guide rail), a movable tool apron, a fixed tool apron, a locking screw, a rough adjustment screw, a fine adjustment screw, pre-tighteningscrews and a fine adjustment handle. The foundation support is of a structure which is located through a key and locked through a T-shaped groove. The movable tool apron is of a stable structure, wherein the upper end of the stable structure suspends and extends, and the stable structure is symmetrical in the left-right direction. The fixed tool apron is of a structure which is slotted from the left side to achieve the large hole diameter and achieves the lever effect. All components are located on the same central axis. The large-stroke high-sensitivity turning tool nose height precision adjustment device can be widely applied to a precision or super-precision lathe, and height adjustment with respect to the stroke resolution, from the millimeter scale to the micron scale, of a turning tool can be achieved.
Owner:陈耀龙
Who we serve
- R&D Engineer
- R&D Manager
- IP Professional
Why Patsnap Eureka
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com