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48results about How to "Reduce output force" patented technology
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Walking robot
ActiveUS8042627B2Simple control mechanismOptimize drive structureProgramme-controlled manipulatorJointsKnee JointEngineering
Disclosed is a walking robot having an improved driving structure for a pitch-direction femoral joint and a knee joint. The walking robot includes a pitch-direction actuator driving the pitch-direction femoral joint to rotate a femoral link relative to a body in a pitch direction, and a power transmission unit transferring driving force of the pitch-direction actuator to the knee joint to rotate the lower leg link relative to the femoral link in the pitch direction.
Owner:SAMSUNG ELECTRONICS CO LTD
Walking robot
ActiveUS20090301798A1Simple control mechanismOptimize drive structureProgramme-controlled manipulatorJointsKnee JointEngineering
Disclosed is a walking robot having an improved driving structure for a pitch-direction femoral joint and a knee joint. The walking robot includes a pitch-direction actuator driving the pitch-direction femoral joint to rotate a femoral link relative to a body in a pitch direction, and a power transmission unit transferring driving force of the pitch-direction actuator to the knee joint to rotate the lower leg link relative to the femoral link in the pitch direction.
Owner:SAMSUNG ELECTRONICS CO LTD
Spring-loaded oil overflow valve for diaphragm compressors
InactiveUS6851449B2Reduces output forceFaster close timeFlexible member pumpsCheck valvesHigh energyEngineering
A diaphragm head with a high energy content of the oil space (pressure×volume) has a strong negative influence on the corresponding behavior of the oil overflow valve. The reaction of the valve leads to an undesirable increase in the opening time by which more oil is discharged than oil introduced by means of a compensation pump. This has the result that after multiple strokes the diaphragm is not driven to its dead position. With this, all of the compressed gas is not expelled which is accompanied by a rapid decrease of the suction capacity.The solution to this problem according to the present invention is achieved by means of a flow-interrupting edge formed at the junction of the valve seat and a restriction piece at the outlet side by which the operating forces of the valve spindle are sharply reduced. With this the effective closing force of the spring, as the dominant force component, leads to the desired fast closing time to the valve.
Owner:KLEIBRINK HORST
Mems-based nanopositioners and nanomanipulators
InactiveUS20090278420A1Precise closed-loop controlRapid responseProgramme-controlled manipulatorMicromanipulatorNanomanipulatorClosed loop
A MEMS-based mano manipulator or nanopositioner is provided that can achieve both sub-nanometer resolution and millimeter force output. The nanomanipulator or nanopositioner comprises a linear amplification mechanism that minifies input displacements and amplifies input forces, microactuators that drive the amplification mechanism to generate forward and backward motion, and position sensors that measure the input displacement of the amplification mechanism. The position sensors obtain position feedback enabling precise closed-loop control during nanomanipulation.
Owner:SUN YU +1
Bi-piezoelectric stack driving type precision rotary driving device
PendingCN107947629AHigh frequency responseReduce volumePiezoelectric/electrostriction/magnetostriction machinesInterference fitRotary stage
The invention relates to a bi-piezoelectric stack driving type precision rotary driving device, and belongs to the technical field of precision engineering. The bi-piezoelectric stack driving type precision rotary driving device comprises a support base, a rotary table, a stator assembly, a bearing and the like; the support base and the rotary table are connected through the bearing in a matched manner; the support base and the stator assembly are connected through a bolt; the rotary table and the stator assembly are contacted and matched through the front end of a driving foot; and the bearing, the support base and the rotary table are in interference fit. When an exciting electric signal acts on a stack type piezoelectric component, the stack type piezoelectric component performs axial elongation based on the inverse piezoelectric effect; therefore, the driving foot performs tangential displacement, so that the rotary table is driven to perform rotational motion; and the direction and the time sequence of driving voltage are changed, so that the rotary table can be controlled to perform forward rotation, inverse rotation and positioning stillness. The bi-piezoelectric stack driving type precision rotary driving device disclosed by the invention has the technical advantages of being simple in structure, high in positioning precision, large in stroke, rapid in response speed and the like, and has wide application prospect in the technical field of precision engineering.
Owner:JILIN UNIV
A nut screw type car carrier
Owner:安徽博微联控科技有限公司
Low-noise high-pressure-difference adjusting valve
ActiveCN104633201AReduce output forceReduce leakageSpindle sealingsValve members for absorbing fluid energyLow noiseEngineering
The invention provides a low-noise high-pressure-difference adjusting valve which comprises a valve body, a valve cover, a sleeve, a valve element and a valve rod. The valve cover is connected to the top of the valve body through bolts, the sleeve is clamped between the valve cover and the valve body, a plurality of first-kind adjusting holes are formed in the upper portion of the side wall of the sleeve, a plurality of second-kind adjusting holes are formed in the lower portion of the side wall of the sleeve and the bottom face of the sleeve, the valve element is arranged in an inner cavity of the sleeve and can vertically move in the inner cavity of the sleeve, so that the low-noise high-pressure-difference adjusting valve is closed or opened, a plurality of pressure balance holes are formed in the valve element in the axial direction of the valve element, and the valve rod penetrates through a center through hole in the valve cover and is connected with the valve element. The low-noise high-pressure-difference adjusting valve is simple, compact and reasonable in structure, small in size and light, and has the advantage of being capable of bearing a high pressure difference and a high leakage level under the condition of the same drive source.
Owner:上海铂嘉阀门有限公司
Reinforced synchronizer
InactiveCN103352932AOutput power amplificationReduce output forceMechanical actuated clutchesSocial benefitsEconomic benefits
The invention relates to a reinforced synchronizer which comprises a joint sleeve, a spline hub, a positioning sliding block, a synchronizing ring and a target retaining gear. The reinforced synchronizer is characterized in that a reinforced ring is arranged between the synchronizing ring and the spline hub. An outer reinforced slant face is arranged on a reinforced bump at the outer end face of the synchronizing ring of the synchronizer. The reinforced synchronizer has the advantage of producing axial reinforcement in a synchronizing stage and amplifying output power of a drive device. When the reinforced synchronizer is applied to a manual speed changer, working intensity of a driver can be reduced and when the reinforced synchronizer is applied to the automatic speed changing technology, energy loss in a gear shifting process of a gear shifting actuator can be reduced. Meanwhile, the size of the gear shifting actuator can be further reduced, and a good technical base is provided for improvement of gear shifting quality. Compared with the prior art, the reinforcement efficacy is high and obvious economic benefits and social benefits can be produced.
Owner:NANJING UNIV OF SCI & TECH
Direct-acting type ratio overflow valve
ActiveCN102913501AChange control characteristicsDetermine the range of pressure regulationServomotor componentsDead bandEngineering
The invention relates to a direct-acting type ratio overflow valve which comprises a ratio electromagnet, a spring base, a spring, a valve core, a valve base, a valve body and an adjusting screw, wherein a push rod of the ratio electromagnet is directly connected with the valve core or is connected with the valve core through a transition rod, the spring base is directly arranged on the end surface of the ratio electromagnet, and the spring is arranged on the spring base and the valve core; and spring force and force output by the ratio electromagnet are acted on the valve core in a superposition manner, when the input is zero, the ratio overflow valve can have high opening pressure, the adjusting screw is adjusted to change the spring force, a characteristic curve of the ratio overflow valve moves in an upper-down manner, and a dead zone of the ratio overflow valve can not be increased. According to the valve, the requirements that the direct-acting type ratio overflow valve has the high opening pressure when an input signal is zero, and when the input signal is increased, the opening pressure is increased in a ratio manner, and the dead zone is small can be met, and the cost is low.
Owner:CHONGQING HONGJIANG MACHINERY
Self-energy-supply magnetorheological damper and working method thereof
InactiveCN107701644AEfficient collectionGuaranteed to maximizeSpringsNon-rotating vibration suppressionEnergy recoveryEngineering
The invention relates to a self-energy-supply magnetorheological damper and a working method thereof. The damper comprises a hollow piston rod, a magnetorheological damper system and an energy recycling system; the energy recycling system comprises an induction coil sleeve fixedly arranged in the piston rod; a magnetic ring shaft is arranged in the induction coil sleeve; and the external impactingborne by the piston rod makes the magnetic ring shaft and the induction coil sleeve relatively move to generate magnetic induction line cutting so as to generate induction current to be provided fora work power source for the magnetorheological damper system. According to the self-energy-supply magnetorheological damper, external power input is not needed, the self-energy-supply magnetorheological damper can be applied to a place without an external connection power source, the structure is simple, and adaptability is high.
Owner:FUZHOU UNIV
Nut screw type automobile transporting device
The invention discloses a nut screw type automobile transporting device which comprises a transporting vehicle, a lifting bracket and an unfolding mechanism. The lifting bracket is arranged on the upper side of the transporting vehicle; the unfolding mechanism is arranged on the upper side of the lifting bracket; the lifting bracket comprises a front upper frame and a rear upper frame; the front upper frame and the rear upper frame are correspondingly provided with jacking mechanisms for jacking; each jacking mechanism comprises a jacking motor, a jacking driving gear component, a chain, nut screws and jacking driven chain wheels; output ends of the jacking motors are in transmission connection with the jacking driving gear components; the jacking driving gear components are in transmission connection with the jacking driven chain wheels by means of the chain; and the jacking driven chain wheels are in transmission connection with input ends of the screw nuts. An output force of the chain is greatly reduced, the problem of easy damage of the chain under large load at long transportation distance is avoided, and the reliability of the transporting device is improved; and a plurality of unfolding driven gear components are driven at the same height by a single rack, so that the problem that the overall thickness of the transporting device is increased is further avoided.
Owner:安徽博微联控科技有限公司
Distributed nonlinear drive deployment method for large-diameter annular reflector
ActiveCN106250609AReduce deployment forceReduce output forceDesign optimisation/simulationConstraint-based CADEnergy distributionCorner angle
The invention relates to a distributed nonlinear drive deployment method for a large-diameter annular reflector. The distributed nonlinear drive deployment method comprises the following steps of: (1), obtaining the nonlinear output torque of a hinge of an annular reflector by calculation, and obtaining the output torque Tfar of a far-end hinge and the output torque Tnear of a near-end hinge; (2), obtaining the corresponding relationship of the rotational angle of a driving gear at the far-end hinge and the rotational angle of a driven gear at the far-end hinge shown in the specification, and the corresponding relationship of the rotational angle of a driving gear at the near-end hinge and the rotational angle of a driven gear at the near-end hinge shown in the specification by calculation; (3), calculating a transmission ratio of the driven gear to the driving gear at the far-end hinge and a transmission ratio of the driven gear to the driving gear at the near-end hinge at any time; and (4), respectively obtaining corresponding gear trains by calculation according to the transmission ratio ifar and the transmission ratio inear. By means of the distributed nonlinear drive deployment method disclosed by the invention, energy distribution of a system in a deployment process is optimized; furthermore, the motor output energy in the deployment process is reduced; and thus, the deployment driving force is reduced.
Owner:XIAN INSTITUE OF SPACE RADIO TECH
Upper limb exoskeleton storing energy by virtue of linear spring with adjustable load
ActiveCN106891323AImprove practicalityReduce output forceProgramme-controlled manipulatorSacroiliac jointSmall arms
The invention discloses an upper limb exoskeleton storing energy by virtue of a linear spring with an adjustable load, aiming at solving the problem that an existing gravity-balance exoskeleton cannot be automatically adjusted with regard to different loads. A big arm and a small arm of the upper limb exoskeleton disclosed by the invention are the same; the big arm comprises a front joint, an upper connection rod of the big arm, a gravity-balance spring, a first steel wire rope, a second steel wire rope, an opposite-force spring, a lower connection rod of the big arm, a motor, a speed reducer, a slide rail, a lead screw nut, a rear joint, a lead screw, a gravity-balance spring fixed seat, an opposite-force spring fixed seat, a first cam, a second cam, two upper rotary shafts, two lower rotary shafts, two lead screw bearing seats and four bearings; and the big arm and the small arm are sequentially arranged, the rear joint on the big arm is hinged with a front joint on the small arm through an elbow rotary shaft, and a rear joint on the small arm is hinged with a front joint of a hand through a hand rotary shaft. The upper limb exoskeleton disclosed by the invention is used for assisting to carry heavy cargoes or helping to carry around some articles, and is capable of balancing the gravity generated due to the weights of the cargoes, and reducing a load on the upper limb of a human body.
Owner:HARBIN INST OF TECH
Energy-saving balanced high-pressure single seated valve
InactiveCN103115189AReduce output forceAdd balance pistonOperating means/releasing devices for valvesValve housingsDamping factorPiston Guide
The invention provides an energy-saving balanced high-pressure single seated valve which comprises a valve body, a valve cover, a valve rod, a valve core and a valve seat. The valve rod penetrates through the valve cover and extends into the interior of the valve body, the valve core is arranged on the middle portion of the valve rod, and the valve seat matched with the valve core is arranged on the inner wall of the valve body. Two sets of piston devices are arranged in the valve body and on two sides of the valve core in a symmetrical mode, piston cylinders in the two sets of the piston devices are used for processing piston guide stroke holes along the action direction of the valve rod on the inner surface of the valve body, and corresponding pistons are arranged on the valve rod. Acting force generated when a medium in the valve acts on the pistons and the section of the valve core is balanced out mutually, driving force needed by an actuator is reduced and energy is saved, the high pressure difference bearing capability of the valve is improved, and the valve core is free from the phenomenon of oscillating when the high-pressure difference is generated. The valve body is simple in structure, compared with a traditional medium flow channel, a Z-shaped medium flow channel is simple, small in damping coefficient, and therefore energy consumption of the valve is reduced; and processing in the valve body is convenient and easy and the blocking phenomenon of the medium is reduced due to arrangement of the Z-shaped medium flow channel and the piston guide stroke holes.
Owner:四川华林自控科技有限公司
Airplane steering engine electro-hydraulic loading system synchronously controlled through parallel connection of double valve controlled hydraulic cylinders
InactiveCN108397433AReduce forced flowReduce output forceServomotor componentsServomotorsHydraulic cylinderSynchronous control
The invention relates to an airplane steering engine electro-hydraulic loading system synchronously controlled through the parallel connection of double valve controlled hydraulic cylinders. The airplane steering engine electro-hydraulic loading system synchronously controlled through the parallel connection of the double valve controlled hydraulic cylinders comprises a first controller, a secondcontroller, a third controller, a first servo valve, a second servo motor, a third servo motor, a fourth servo motor, a first hydraulic cylinder, a second hydraulic cylinder, two rubber metal buffer springs, two force sensors, two first position sensors and two second position sensors. According to the airplane steering engine electro-hydraulic loading system synchronously controlled through the parallel connection of the double valve controlled hydraulic cylinders provided by the invention, not only is the frequency response of the loading system improved, but also the forced flows in the hydraulic cylinders are reduced; and meanwhile, by adopting parallel connection control of the two hydraulic cylinders, the output force of a single hydraulic cylinder is reduced, the cost is reduced, meanwhile, the redundant force in the system is reduced, and the stability and the loading accuracy of the loading system are improved.
Owner:HANGCHENG TIANJIN TECH
Self-seal hard dual-valve seat of balance-type valve core
The invention discloses a self-seal hard dual-valve seat of a balance-type valve core. The self-seal hard dual-valve seat comprises a valve cage, a regulating sleeve, a seal ring and the valve core; the seal ring is arranged between the valve cage and positioning steps of the regulation sleeve; and the inner diameter part of the sear ring and the valve core are in contact seal. According to the invention, the seal effect is realized through the deformation of the seal ring through the pressure difference of media at two sides of the seal ring.
Owner:SHANGHAI WENTE FLUID CONTROL VALVE CO LTD
A test device for oil-pneumatic suspension system
ActiveCN107356442BReduce output forceReduce testing costsVehicle suspension/damping testingHydraulic cylinderHydropneumatic suspension
The invention provides a test device of an oil and gas suspension system. The test device comprises a foundation, the oil and gas suspension system, an excitation hydraulic cylinder, a pressure sensor connected with the excitation hydraulic cylinder and a hydraulic servo control system used for controlling motion of the excitation hydraulic cylinder, wherein the oil and gas suspension system comprises one or more oil and gas suspension cylinder sets mounted on the foundation and an energy storage device connected with the oil and gas suspension cylinder set through a pipeline, the two oil and gas suspension cylinders of the oil and gas suspension cylinder set are connected in an opposite mode through a connection head, the excitation hydraulic cylinder is mounted on the foundation, and a cylinder lever of the excitation hydraulic cylinder is parallelly connected with the middle portion of the connection head. The test device is advantaged in that test analysis on inclination performance of the one or more oil and gas suspension cylinder sets is realized through the one excitation hydraulic cylinder, and test cost is substantially reduced.
Owner:JIMEI UNIV
Material conveying device for building space operation
ActiveCN109160437AImprove stabilityAvoid manual throwing and deliveryPortable liftingDrive wheelIndustrial engineering
The invention discloses a material conveying device for building space operation. The material conveying device comprises a base and a hoisting disc, supporting legs are arranged at the bottom of thebase, a lifting rod is slidably mounted on the base, and the lifting rod penetrates through the upper side and the lower side of the base; guide sleeves are arranged on the upper side and the lower side of the base, and can guide the lifting rod, the lifting rod is provided with a second driving wheel, the lifting rod can be driven to ascend and descend through the second driving wheel, and the second driving wheel is located inside the base and is rotationally connected with the base; and a first driving wheel is arranged on one side of the second driving wheel and can drive the second driving wheel to rotate, a motor is arranged on one side of the first driving wheel, and a hydraulic cylinder is arranged below the base. The material conveying device for building space operation has the beneficial effects that stable lifting of materials and tools can be realized, so that manual throwing and delivery are avoided, and the labor burden is reduced; and an upward lifting force can be applied to the hoisting disc through auxiliary lifting devices, so that the output force of the motor is reduced.
Owner:江西云帆环保建材有限公司
Proportional pressure brake control valve
ActiveCN105216777AReduce output forceReduce volumeApplication and release valvesEngineeringControl valves
The invention relates to a proportional pressure brake control valve which comprises a valve body and an asymmetric piston located in the valve body. The Asymmetric piston comprises a cylindrical part and a piston part which is vertically and fixedly connected with the cylindrical part; the piston part comprises a first piston body, a second piston body and a fixed shaft which is fixedly connected between the first piston body and the second piston body; a first oil return channel is formed between the firs piston body and the inner wall of the valve body, and a second oil return channel is formed between the second piston body and the inner wall of the valve body; the first oil return channel is communicated with a first chamber formed by the valve body and the first piston body, and the second oil return channel is communicated with a second chamber formed by the valve body and the second piston body. With the adoption of the proportional pressure brake control valve, output force of a driving mechanism can be reduced, and the size and the weight of the driving mechanism are reduced accordingly.
Owner:BEIHANG UNIV
Locking mechanism
PendingCN114312459ALow costImprove stabilityCharging stationsElectric propulsion mountingPhysicsEngineering
The invention relates to the technical field of electric automobiles, in particular to a locking mechanism. The locking mechanism comprises a first connecting rod, a second connecting rod, a third connecting rod, a fourth connecting rod and a driving piece. The second connecting rod is hinged to the first connecting rod, the third connecting rod is hinged to the second connecting rod, the fourth connecting rod is hinged to the first connecting rod, the fourth connecting rod is hinged to the third connecting rod, and hinge points among the first connecting rod, the second connecting rod, the third connecting rod, the fourth connecting rod and the driving part are different. The third connecting rod and the fourth connecting rod are driven to rotate, so that the free end of the fourth connecting rod presses and fixes the workpiece. According to the structure, the output force of the driving part is amplified through the second connecting rod, the third connecting rod and the fourth connecting rod, the cost of the locking mechanism is reduced, the stability of locking workpieces is improved, meanwhile, the locking mechanism is simple in structure and low in requirement for application space, and the compatibility of the locking mechanism is enhanced.
Owner:苏州睿锂物联科技有限公司
System and method for efficient wide dynamic range coil drive
ActiveUS7579793B2Efficient productionHigh resolutionPortable framesDC motor speed/torque controlEngineeringWide dynamic range
Owner:HONEYWELL INT INC
Test device of oil and gas suspension system
ActiveCN107356442AReduce output forceReduce testing costsVehicle suspension/damping testingHydraulic cylinderHydropneumatic suspension
The invention provides a test device of an oil and gas suspension system. The test device comprises a foundation, the oil and gas suspension system, an excitation hydraulic cylinder, a pressure sensor connected with the excitation hydraulic cylinder and a hydraulic servo control system used for controlling motion of the excitation hydraulic cylinder, wherein the oil and gas suspension system comprises one or more oil and gas suspension cylinder sets mounted on the foundation and an energy storage device connected with the oil and gas suspension cylinder set through a pipeline, the two oil and gas suspension cylinders of the oil and gas suspension cylinder set are connected in an opposite mode through a connection head, the excitation hydraulic cylinder is mounted on the foundation, and a cylinder lever of the excitation hydraulic cylinder is parallelly connected with the middle portion of the connection head. The test device is advantaged in that test analysis on inclination performance of the one or more oil and gas suspension cylinder sets is realized through the one excitation hydraulic cylinder, and test cost is substantially reduced.
Owner:JIMEI UNIV
High temperature large-caliber flue gas pipeline inlet airtight device used in cement industry
InactiveCN102840342ANegative pressure suction decreasesReduce forceOperating means/releasing devices for valvesLift valveFlue gasEngineering
The invention discloses a high temperature large-caliber flue gas pipeline inlet airtight device used in cement industry. The airtight device comprises a valve body, a valve cover, an actuating arm assembly, a bearing part, a pin shaft, a sealing part, a driving part, a high temperature resistant layer and a pressure relief part; an inclined sealing surface is arranged at the inner opening of the valve body; a mounting groove is arranged on the upper end surface of the valve body; the sealing part is arranged in the mounting groove; the high temperature resistant layer is lined on the inclined sealing surface and the inner wall of the mounting groove; the high temperature resistant layer is lined on the inclined sealing surface and a lower plane in contact with the sealing part; the valve cover is connected with the actuating arm assembly via the pin shaft; a pin shaft hole is U-shaped; the pressure relief part is installed on the valve cover; the pressure relief part comprises a pressure relief part valve cover connected with the actuating arm assembly; the actuating arm assembly is connected with the bearing part; and the bearing part is connected with the driving part. The airtight device relieves the pressure firstly, reduces the acting force of the negative pressure to the valve cover, save manufacturing cost, and has safe and reliable structure and good sealing property.
Owner:YANGZHOU GAOBIAN MACHINE
A distribution plate that can distribute different flow differences
ActiveCN110714910BHigh utility valueReduce output forcePositive displacement pump componentsLiquid fuel engine componentsPhysicsTraffic volume
The invention discloses a flow distribution plate capable of distributing different flow differences for a high-pressure axial plunger pump with multiple oil outlets. The distribution plate is composed of three layers: the upper layer, the middle layer and the bottom layer. The raised part of the distribution window of the middle layer is in high pressure sealing fit with the positioning part of the upper layer and the bottom layer. The distribution plate is a series structure of multiple distribution windows: there are multiple oil suction windows and two (or more) oil discharge windows, one side is the distribution window C, and the other side is two (or more) distribution windows arranged in series A, B, multiple flow distribution windows are located on the same graduation circle. The middle layer of the distribution plate can rotate freely through the servo control drive, changing the area size of the A and B distribution windows, and through the adjustment of the middle layer of the distribution plate, the flow rate of the A and B distribution windows can be changed, so that the two distribution windows output different flow rates , corresponding to the two chambers of the differential oil cylinder with different flow differences, the action of the differential oil cylinder with different flow differences can be directly controlled with one pump, and the practical value is high.
Owner:TAIYUAN UNIV OF TECH
A booster synchronizer
InactiveCN103352932BOutput power amplificationReduce output forceMechanical actuated clutchesSocial benefitsEconomic benefits
The invention relates to a reinforced synchronizer which comprises a joint sleeve, a spline hub, a positioning sliding block, a synchronizing ring and a target retaining gear. The reinforced synchronizer is characterized in that a reinforced ring is arranged between the synchronizing ring and the spline hub. An outer reinforced slant face is arranged on a reinforced bump at the outer end face of the synchronizing ring of the synchronizer. The reinforced synchronizer has the advantage of producing axial reinforcement in a synchronizing stage and amplifying output power of a drive device. When the reinforced synchronizer is applied to a manual speed changer, working intensity of a driver can be reduced and when the reinforced synchronizer is applied to the automatic speed changing technology, energy loss in a gear shifting process of a gear shifting actuator can be reduced. Meanwhile, the size of the gear shifting actuator can be further reduced, and a good technical base is provided for improvement of gear shifting quality. Compared with the prior art, the reinforcement efficacy is high and obvious economic benefits and social benefits can be produced.
Owner:NANJING UNIV OF SCI & TECH
Loudspeaker assembly and electronic equipment
PendingCN114466280AGuaranteed relative inverse settingMinimize or avoid noise problemsLoudspeakersDigital data processing detailsEngineeringLoudspeaker
The embodiment of the invention provides a loudspeaker assembly and electronic equipment, and the loudspeaker assembly is characterized in that a first surface of one of two adjacent loudspeaker modules and a second surface of the other of the two adjacent loudspeaker modules are located at the same side of a support. The second surface of one of the two adjacent loudspeaker modules and the first surface of the other of the two adjacent loudspeaker modules are located on the same side of the support. According to the electronic equipment, the loudspeaker modules are arranged on the support, one of the two adjacent loudspeaker modules is connected with the other one of the two adjacent loudspeaker modules through the support, the problem that noise occurs to the electronic equipment is reduced or avoided, the call effect and the loudspeaker quality of the electronic equipment are improved, and therefore the experience feeling of a user is improved.
Owner:BEIJING HONOR DEVICE CO LTD
Low noise and high pressure differential regulating valve
ActiveCN104633201BReduce output forceReduce leakageSpindle sealingsValve members for absorbing fluid energyLow noiseDifferential pressure
The invention provides a low-noise high-pressure-difference adjusting valve which comprises a valve body, a valve cover, a sleeve, a valve element and a valve rod. The valve cover is connected to the top of the valve body through bolts, the sleeve is clamped between the valve cover and the valve body, a plurality of first-kind adjusting holes are formed in the upper portion of the side wall of the sleeve, a plurality of second-kind adjusting holes are formed in the lower portion of the side wall of the sleeve and the bottom face of the sleeve, the valve element is arranged in an inner cavity of the sleeve and can vertically move in the inner cavity of the sleeve, so that the low-noise high-pressure-difference adjusting valve is closed or opened, a plurality of pressure balance holes are formed in the valve element in the axial direction of the valve element, and the valve rod penetrates through a center through hole in the valve cover and is connected with the valve element. The low-noise high-pressure-difference adjusting valve is simple, compact and reasonable in structure, small in size and light, and has the advantage of being capable of bearing a high pressure difference and a high leakage level under the condition of the same drive source.
Owner:上海铂嘉阀门有限公司
Proportional Pressure Brake Control Valve
ActiveCN105216777BReduce output forceReduce volumeApplication and release valvesEngineeringControl valves
The invention relates to a proportional pressure brake control valve which comprises a valve body and an asymmetric piston located in the valve body. The Asymmetric piston comprises a cylindrical part and a piston part which is vertically and fixedly connected with the cylindrical part; the piston part comprises a first piston body, a second piston body and a fixed shaft which is fixedly connected between the first piston body and the second piston body; a first oil return channel is formed between the firs piston body and the inner wall of the valve body, and a second oil return channel is formed between the second piston body and the inner wall of the valve body; the first oil return channel is communicated with a first chamber formed by the valve body and the first piston body, and the second oil return channel is communicated with a second chamber formed by the valve body and the second piston body. With the adoption of the proportional pressure brake control valve, output force of a driving mechanism can be reduced, and the size and the weight of the driving mechanism are reduced accordingly.
Owner:BEIHANG UNIV
A high-power electro-hydraulic control system for compression shear testing machine
ActiveCN114518284BReduce output forceReduce trafficServomotor componentsServomotorsEngineeringMachine
Owner:TAIYUAN UNIV OF TECH
A three-way control valve for high pressure
InactiveCN104214382BReduce output forceStable jobEqualizing valvesMultiple way valvesAutomatic controlEngineering
Owner:ZHEJIANG ZHIJIE VALVE IND
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