241results about How to "Improved vibration characteristics" patented technology

The invention discloses a built-in and suspension integrated hub motor drive electric wheel. The electric wheel comprises a hub motor, a brake, a wheel, a damping mechanism and a speed reduction mechanism, wherein the speed reduction mechanism comprises a sun wheel, a planet wheel, a planet carrier and a gear ring; the damping mechanism comprises a first elastic element and a second elastic element; and the hub motor is connected with a vehicle through the first elastic element, and is connected with a supporting shaft of the wheel through the second elastic element. Compared with the prior art, the electric wheel has the advantages that the electric wheel has a compact structure, is light in mass and high in power density and can be easily distributed on the wheel; the dynamic properties and the safety of the vehicle are remarkably improved; and simultaneously, the dynamic characteristics of an electric wheel driving system are effectively improved, the grounding performance of the wheel is improved, and the service life of parts is prolonged.

A vehicle memory mirror system of the present invention includes an interior rearview mirror assembly. The mirror assembly includes a mirror casing, with a reflective element, and a support, which is adapted to mount the mirror assembly to a vehicle. An electrical actuator is located interiorly of the mirror casing and is adapted to adjust the orientation of the reflective element to adjust the rearward field of view of the reflective element.

A vehicular interior rearview mirror system includes a housing, a mounting member configured to mount to a vehicle windshield, an electrical actuator, which is supported by the mounting member with the weight of the electrical actuator being transferred to the windshield by way of the mounting member, and a reflective element. The reflective element is mounted to the electrical actuator and has a rearward field of view when mounted to the electrical actuator, which provides adjustment of the rearward field of view of the reflective element.

The invention relates to an inertia measuring module of an unmanned aircraft. The inertia measuring module comprises a housing assembly, a sensing assembly and a vibration damper, wherein the vibration damper comprises a first vibration damping pad; the sensing assembly comprises a first circuit board, a second circuit board, and a flexible signal line connecting the first circuit board and the second circuit board; an inertia sensor is fixed on the second circuit board; the first circuit board is fixed on the housing assembly; the unmanned aircraft inertia measuring module also comprises a weight gain block, and the integral body formed by orderly bonding the second circuit board, the weight gain block, the first vibration damping pad and the first circuit board is clamped in the housing assembly. According to the invention, components such as the inertia sensor and the like which have high requirements for vibration performance are integrated on the second circuit board; by setting the first vibration damping pad, the vibration suffered by the inertia sensor is attenuated to below 30% of the vibration when no vibration damping pad is used; the influence on the inertia sensor caused by the working vibration frequency of the unmanned aircraft is greatly reduced; and the stability of the inertia sensor measurement is improved.

The invention provides an optimum design method of a non-bearing frame structure of a light vehicle. The optimum design method comprises the steps of establishing a three-dimensional geometrical model of the original frame structure of the light vehicle by use of SolidWorks software and outputting the model in the IGES (Initial Graphics Exchange Specification) data file format, thereby obtaining the IGES model of the frame structure, next, reading the IGES model of the frame structure in Hypermesh software, performing geometrical processing and dividing finite element meshes by use of the Hypermesh software, and performing topological optimization on the cross beam structure of the frame by use of the structure optimization function of the Hypermesh software without changing the structural forms of the longitudinal beam and the attached seats of the frame, thereby realizing the optimum design of the arrangement position and the structural form of the cross beam structure. The optimum design method of the non-bearing frame structure of the light vehicle is capable of improving the bending rigidity and torsional rigidity of the frame of the light vehicle and the inherent frequency of the frame structure without increasing the weight of the frame structure, thereby ensuring that the frame has relatively high overall rigidity and improving the reliability, security, operation stability and vibration property of the vehicle.

A vibration generator includes a circumferential wall portion, a vibrating body arranged inside the circumferential wall portion in an opposing relationship with a coil and configured to reciprocatingly vibrate in one direction, a band-shaped leaf spring arranged between the vibrating body and the circumferential wall portion to support the vibrating body on the circumferential wall portion, and a damper member including a base portion attached to one of the vibrating body and the leaf spring and a tip end portion extending toward the other of the vibrating body and the leaf spring. The tip end portion of the damper member makes sliding contact with the leaf sprig or the vibrating body.

A surface mount crystal unit comprising a crystal blank, a planar mounting substrate made of silicon and a cover having a shape with a recess and made of glass containing ions having high mobility. The mounting substrate and the cover are bonded by means of anode bonding and the crystal blank is hermetically sealed in a case made up of the mounting substrate and the cover. The mounting substrate has connection electrodes used for a connection with the crystal blank and external terminals to be used to surface-mount the crystal unit. The connection electrodes and external terminals are electrically connected.

Provided are a glass substrate bonding method capable of securely anodically bonding a bonding material and a glass substrate even when Si having a large resistance value is used as a material for the bonding material, a glass assembly obtained by the glass substrate bonding method, a package manufacturing method, a package, a piezoelectric vibrator, and an oscillator, an electronic device, and a radio-controlled timepiece having the piezoelectric vibrator. A glass substrate bonding method includes an anodic bonding step of anodically bonding a bonding material fixed to an inner surface of a lid substrate wafer to a base substrate wafer. The bonding material is formed of an ITO film and a Si film which are sequentially formed on the inner surface of the lid substrate wafer.

To provide a flexible polyurethane foam having good vibration characteristics and suitable particularly for a seat for an automobile.A flexible polyurethane foam obtained by reacting a high molecular weight polyoxyalkylene polyol or a polymer-dispersed polyol containing fine polymer particles in the high molecular weight polyoxyalkylene polyol, with a polyisocyanate compound, in the presence of a catalyst, a blowing agent and a foam stabilizer, characterized in that an amino-modified silicone (F) having a silicon atom and a nitrogen atom in its molecule is used in an amount of from 0.00001 to 1 part by mass per 100 parts by mass of all active hydrogen compounds.

A vibration generator includes a circumferential wall portion, a vibrating body arranged inside the circumferential wall portion in an opposing relationship with a coil and configured to reciprocatingly vibrate in one direction, a band-shaped leaf spring arranged between the vibrating body and the circumferential wall portion to support the vibrating body on the circumferential wall portion, and a damper member including a base portion attached to one of the vibrating body and the leaf spring and a tip end portion extending toward the other of the vibrating body and the leaf spring. The tip end portion of the damper member makes sliding contact with the leaf sprig or the vibrating body.

The invention relates to an active thermal control focusing device for a space camera. The device comprises a secondary mirror component and a focusing component, wherein the secondary mirror component comprises a secondary mirror chamber (1), a secondary mirror pressure ring (2) and a secondary lens (3); the focusing component comprises a heatproof mat (4), an invar steel column (5), an aluminum ring (6), a heating piece (7), a radiator (8) and a thermistor (9); the secondary lens (3) is tightly pressed in the secondary mirror chamber (1) through the secondary mirror pressure ring (2). The device has the advantages of consistency with a space using condition, stable performance, high accuracy and reliable structure.

This invention, in general, relates to a magnetic or magneto-optical hard disk drive cover constructed using a carbon-fiber and / or carbon-black filled "Liquid Crystal Polymer" (LCP) resin that is injection molded to form the previously mentioned magnetic or magneto-optical hard disk drive cover. Using injection molded LCP materials and methods can attain an increased dimensional precision. The carbon-fiber and / or carbon-black filled LCP hard disk drive cover is able to attain the requisite rigidity needed to endure vibrations caused by latency eliminating spindle-motors with ever increasing "Revolutions Per Minute" (RPM) properties without using any structural reinforcing metal frames or metal inserts. The addition of carbon-black to a carbon-fiber filled LCP makes a hard disk drive cover constructed from such material, electrically conductive and therefore, acts when installed onto a grounded hard disk drive, as an "Electro-Static Discharge" (ESD), and / or "Electro-Magnetic Interference" (EMI) device.

The invention discloses a magneto-rheological hydraulic suspension device which comprises an upper connecting bolt, a synthetic framework, a rubber main spring and a main spring support. The main spring support is fixed on a support, the lower end of the support is connected with a lower connecting bolt, an upper liquid chamber partition plate and a lower liquid chamber partition plate are arranged at the junction of the main spring support and the support, and symmetrical tapered bosses are arranged at the centers of the upper liquid chamber partition plate and the lower liquid chamber partition plate and provided with tapered through holes. A rubber bottom film is clamped between the lower liquid chamber partition plate and the support, a chamber defined by the synthetic framework, the rubber main spring, the main spring support and the upper liquid chamber partition plate is an upper liquid chamber, a chamber defined by the lower liquid chamber partition plate and the rubber bottom film is the lower liquid chamber, a connecting rod is arranged in the upper liquid chamber, one end of the connecting rod is connected onto the synthetic framework, the other end of the connecting rod is connected with main electromagnetic coils, and the main electromagnetic coils are located in the tapered through holes. The magneto-rheological hydraulic suspension device enlarges a damping adjustment range and can isolate vibration and noise of an engine within a wide frequency band and improves the noise reducing performance of the suspension at high frequency.

The invention discloses a built-in suspended integrated type hub motor drive electric wheel. The built-in suspended integrated type hub motor drive electric wheel comprises a hub motor, a brake, a wheel, a vibration absorption mechanism and a speed reduction mechanism, the speed reduction mechanism comprises a sun wheel, a planetary wheel, a planetary rack and a tooth ring, and the vibration absorption mechanism comprises a first elastic element and a second elastic element; the hub motor is connected with a vehicle through the first elastic element and connected with a support axle of the wheel through the second elastic element; the speed reduction mechanism comprises the sun wheel, planetary wheel, planetary rack and tooth ring. Compared with the prior art, the built-in suspended integrated type hub motor drive electric wheel has advantages of compact structure, light weight, large power density and easiness in arrangement on the wheel, and moreover, the dynamic property and safety of the vehicle are obviously improved, the dynamic characteristic of an electric wheel drive system is effectively improved, and the grounding performance of the wheel and the service life of spare parts are improved.

A complex flow-path heat exchanger having U-shaped tube and cantilever combined coil, which can achieve, in this type heat exchanger, a simple construction, a complex flow of steam within the same one heat exchange shell body, a high heat exchange efficiency, and a low energy loss. The technical gift of the present invention is that, after entering into the heat exchanger, steam firstly effects heat exchange on the U-shaped tube flow path shell side to be cooled and condensed, thereafter entering into flow path tube side of the cantilever combined coil, which are disposed within the same one shell, for a secondary heat exchange, and subsequently flowing out of the heat exchanger after being subcooled. Such steam-water heat exchanger having a complex flow path are advantageous in a small steam flow resistance of the U-shaped tube flow path shell side; a higher condensate water flow velocity in the cantilever combined coils flow path tube; a high heat exchange coefficient; good coordination of the temperature difference fields of the hot and cold fluids in the heat exchanger; and a high heat exchange efficiency. Therefore, the present heat exchanger can be a new generation product relative to the currently-used conventional low-temperature, low-pressure and corrosion-free heat exchangers.

A flexible hinge based clamping and positioning device for a linear ultrasonic motor comprises a stator (3) and a rotor guide rail (4). The stator (3) is provided with two vibrators, has a V-shaped structure and is positioned in an opening outer frame (2) through a clamp (1) having a flexible hinge, wherein a frame on the outer frame (2) and parallel to the rotor guide rail (4) is provided with an opening. A driving pin of the stator (3) is positioned at the opening of a first frame. The clamping technique is conducive to improve the stability of the motor structure and increase the output power and the output efficiency of the ultrasonic motor.

To provide a flexible polyurethane foam having good vibration characteristics and suitable particularly for a seat for an automobile. A flexible polyurethane foam obtained by reacting a high molecular weight polyoxyalkylene polyol or a polymer-dispersed polyol containing fine polymer particles in the high molecular weight polyoxyalkylene polyol, with a polyisocyanate compound, in the presence of a catalyst, a blowing agent and a foam stabilizer, characterized in that an amino-modified silicone (F) having a silicon atom and a nitrogen atom in its molecule is used in an amount of from 0.00001 to 1 part by mass per 100 parts by mass of all active hydrogen compounds.

A piezoelectric element of the present invention includes a substrate, a lower electrode layer, a piezoelectric layer, an upper electrode layer, a cavity portion formed below a piezoelectric vibrating portion, and at least two bridging portions. The at least two bridging portions are formed so as not to be line-symmetric with respect to any line segment traversing the piezoelectric vibrating portion and / or so as not to be point-symmetric with respect to any point in the piezoelectric vibrating portion in a projection of the piezoelectric vibrating portion in the laminating direction.

A novel flexible polyurethane foam having good vibration characteristics and being excellent in occupant posture stability, is provided. A flexible polyurethane foam obtainable by reacting a high molecular weight polyoxyalkylene polyol or a polymer-dispersed polyol containing fine polymer particles in the high molecular weight polyoxyalkylene polyol, with a polyisocyanate compound in the presence of a catalyst, a blowing agent and a foam stabilizer, characterized in that as at least a part of the foam stabilizer, the following fluorinated compound (F) is used in an amount of from 0.00001 to 1 part by mass per 100 parts by mass of all active hydrogen compounds: fluorinated compound (F): a compound which is a copolymer of a fluorinated acrylate or a fluorinated methacrylate (p), an alkyl acrylate having a long chain alkyl group, an alkyl methacrylate having a long chain alkyl group, an acrylate containing an oxyalkylene group or a methacrylate containing an oxyalkylene group (q), and optional other copolymerizable monomer (r), wherein the fluorine content is from 12 to 50 mass %.

A piezoelectric element of the present invention includes a substrate, a lower electrode layer, a piezoelectric layer, an upper electrode layer, a cavity portion formed below a piezoelectric vibrating portion, and at least two bridging portions. The at least two bridging portions are formed so as not to be line-symmetric with respect to any line segment traversing the piezoelectric vibrating portion and / or so as not to be point-symmetric with respect to any point in the piezoelectric vibrating portion in a projection of the piezoelectric vibrating portion in the laminating direction.

An apparatus and method for mixing by producing shear and / or cavitation, and components for the apparatus are disclosed. In one embodiment, the apparatus includes a mixing and / or cavitation chamber with an element such as an orifice component that is located adjacent the entrance of the cavitation chamber. The apparatus may further include a blade, such as a knife-like blade, disposed inside the mixing and / or cavitation chamber opposite the orifice component. In one version of such an embodiment, at least some of the portions of the orifice component surrounding the orifice and / or the blade are made of a material or materials that have a Vickers hardness of greater than or equal to about 20 GPa. A process for mixing by producing shear and / or cavitation in a fluid is also contemplated herein.

According to an aspect of the present invention, there is provided a chain saw including: an engine having: a crankcase; a cylinder attached to the crankcase; and a piston configured to reciprocate in the cylinder; a housing configured to accommodate the engine; and a guide bar, around which a saw chain is to be wound so as to be rotated by the engine, the guide bar being attached to the housing, wherein the engine has two surfaces substantially parallel to an axis direction of a crankshaft, the two surfaces being covered with and fixed to the housing, and wherein the engine is fixed to the housing with a fixing member at a side where the guide bar is attached to the housing.

A method for manufacturing a vibration sensor including forming a sacrifice layer at one part of a front surface of a semiconductor substrate of monocrystalline silicon with a material isotropically etched by an etchant for etching the semiconductor substrate, forming a thin film protective film with a material having resistance to the etchant on the sacrifice layer and the front surface of the semiconductor substrate at a periphery of the sacrifice layer, forming a thin film of monocrystalline silicon, polycrystalline silicon, or amorphous silicon on an upper side of the sacrifice layer, opening a backside etching window in a back surface protective film having resistance to the etchant for etching the semiconductor substrate formed on a back surface of the semiconductor substrate, forming a through-hole in the semiconductor substrate by etching the semiconductor substrate anisotropically by using crystal-oriented etching by applying the etchant from the back surface window, then etching the sacrifice layer isotropically by the etchant after the etchant reaches the front surface of the semiconductor substrate, and then etching the semiconductor substrate anisotropically by using crystal-oriented etching from a front side by the etchant spread to a space formed after the sacrifice layer is removed, and forming a holder for supporting the thin film on an upper surface of the semiconductor substrate by removing the thin film protective film partially.

A novel flexible polyurethane foam having good vibration characteristics and being excellent in occupant posture stability, is provided.A flexible polyurethane foam obtainable by reacting a high molecular weight polyoxyalkylene polyol or a polymer-dispersed polyol containing fine polymer particles in the high molecular weight polyoxyalkylene polyol, with a polyisocyanate compound in the presence of a catalyst, a blowing agent and a foam stabilizer, characterized in that as at least a part of the foam stabilizer, the following fluorinated compound (F) is used in an amount of from 0.00001 to 1 part by mass per 100 parts by mass of all active hydrogen compounds:fluorinated compound (F): a compound which is a copolymer of a fluorinated acrylate or a fluorinated methacrylate (p), an alkyl acrylate having a long chain alkyl group, an alkyl methacrylate having a long chain alkyl group, an acrylate containing an oxyalkylene group or a methacrylate containing an oxyalkylene group (q), and optional other copolymerizable monomer (r), wherein the fluorine content is from 12 to 50 mass %.

The invention relates to an easy-to-assemble floating track bed precast slab and an application thereof, which belong to the field of rail transit. According to the invention, the easy-to-assemble floating track bed precast slab can conveniently establish reliable connection with an adjacent floating slab and can smoothly transmit a shear force and improve the force born on the floating slab; and meanwhile, the integrality of a floating track bed structure can be also effectively enhanced, the adaptability of the easy-to-assemble floating track bed precast slab is enhanced and the service life of the easy-to-assemble floating track bed precast slab is prolonged. According to the invention, the easy-to-assemble floating track bed precast slab comprises a precast slab body, wherein the middle part of a connecting end of one side of the precast slab body is fixedly provided with locating guide sleeves; the middle part of a connecting end of the other side of the precast slab body is correspondingly provided with join-assembling holes; the locating guide sleeves and the join-assembling holes are respectively arranged in a longitudinal direction of a track; at least two locating guide sleeves are arranged; the number of the join-assembling holes is as same as that of the locating guide sleeves; a grouting passage is formed in the precast slab body; one end of the grouting passage is communicated with the bottoms of the join-assembling holes; and the other end of the grouting passage is open in the upper surface of the precast slab body. The easy-to-assemble floating track bed precast slab, provided by the invention, is mainly used for the construction of rail transit.

Component (3) is pressed onto a circuit board (4) so that their respective metal interconnects (5), (6) are in close contact with each other, and ultrasonic vibration is applied to the suction nozzle (14) holding the component (3). Friction is thereby generated between metal interconnects (5), (6) whereby the component (3) is bonded on circuit substrate. Suction nozzle (14) for handling components is made of stainless steel and has a working face (14a) provided with a hardened layer (14b), or alternatively, suction nozzle (14) may have a suction head (14c) having a working face (14a) made of cemented carbide. Working face (14a) of suction nozzle (14) is refined by polishing as required during the mounting operation.

To provide a flexible polyurethane foam having good vibration characteristics and suitable particularly for a seat for an automobile. A flexible polyurethane foam obtained by reacting a polyol composition with a polyisocyanate compound in the presence of a catalyst, a blowing agent and a foam stabilizer, characterized in that the polyol composition comprises a high molecular weight polyoxyalkylene polyol (A) and a polymer-dispersed polyol (C) containing fine polymer particles in a high molecular weight polyoxyalkylene polyol (B), and at least part of the fine polymer particles are fine polymer particles obtained by polymerizing a monomer containing a fluorinated acrylate or a fluorinated methacrylate.

The invention discloses a multi-source heterogeneous data fusion and model correction process control method, and belongs to the technical field of automation. The invention is directed to a multi-level complex engineering system. according to the characteristics of data, models and processes, the process is further subdivided into sub-processes; defining a process template of each sub-process; including a data template, a feature template, a method template and a process template, various flexible configurations of the templates are realized; establishment of adaptive multiple heterogeneous data, a link of data and information processed in the fusion process of the model and the fusion method is carried out; fusion and verification are carried out according to an optimal method obtained by matching of an inference engine; the test data fusion and model correction links are more efficient; and moreover, the precision of the model after multi-source heterogeneous data fusion correctioncan be improved, the engineering design efficiency of the multi-level complex engineering system is improved, the prediction precision of the multi-level complex engineering system applied to the corresponding engineering technical field is improved by utilizing the model after multi-source heterogeneous data fusion correction, and related engineering technical problems are solved.

The invention discloses an aluminum vehicle body noise transmission path optimization method based on plate sound pressure contribution. according to a cab plate structure optimization method aiming at vibration attenuation and noise reduction, the vibration characteristic of a plate is improved through measures of optimizing the thickness of the plate, reasonably arranging reinforcing ribs and the like, the vibration amplitude is reduced, and the acoustic comfort of a cab is improved. According to the method, the acoustic contribution degree of the plate is analyzed before structural optimization, so that the structural plate with the maximum influence on noise in the cab is determined, and therefore targeted structural optimization is achieved; According to the analysis method based on the plate contribution amount, a structural part which greatly contributes to a noise transmission path can be effectively found, so that structural optimization can be effectively carried out on a keyposition, the noise transmission characteristic is improved, the structural design optimization efficiency is greatly improved, the research and development period is shortened, and the cost is reduced.

In an SAW device in which an SAW element (5) is mounted on a base (1) of a package (4) with its bonding pads (10) and connection terminals (11) of the package connected by bonding wires, a lid (2) is joined to the base (1) by seam welding to be hermetically sealed. The SAW element (5) is bonded and affixed to a mounting surface (6) of the base (1) by using a conductive adhesive (7) which contains 80 to 85 wt.% of a resin material and 20 to 15 wt.% of a flaky conductive filler, or a conductive adhesive which contains an 82.5 to 85 wt.% of a resin material and 17.5 to 15 wt.% of a conductive filler, the conductive filler comprising 30 wt.% of a small particulate conductive filler and 70 wt.% of a large particulate conductive filler.