80results about How to "Less prone to noise" patented technology

The invention relates to the field of knitting machinery, in particular to a three-jacquard warp-knitting machine. The three-jacquard warp-knitting machine comprises a rack, a loop formation device, aguide bar device and a transmission device, wherein the loop formation device, and the guide bar device and the transmission device are arranged on the rack; the guide bar device comprises a guide bar bed assembly and a guide bar seat fixedly connected with the guide bar bed assembly; the upper end of the guide bar bed assembly is in suspended connection with a first pendulum shaft of the rack, and the first pendulum shaft is fixedly connected with an upper swing arm assembly; the guide bar bed assembly is composed of eight guide bar beds, each guide bar bed is arranged on the guide bar seat,each guide needle is arranged on the corresponding guide bar bed, the guide bar beds located at the two sides are both provided with the guide needles, and the six guide bar beds located in the middle are respectively provided with three sets of piezoelectric ceramic jacquard needles. The invention provides the three-jacquard warp-knitting machine which has the advantages that colors are abundantand products satisfy market requirements.

The invention relates to the technical field of air-conditioners in electrical equipment, in particular to an air-conditioner outdoor motor control method, and aims at reducing noise and vibration production in the process of starting to a high rotation speed of an overall unit. The air-conditioner outdoor motor control method includes the following steps: S1, starting up: the rotation speed of an outdoor fan motor is improved to P (i) max from an actual rotation speed P (actual), and then the outdoor fan motor operates for 3minutes, wherein the P (actual) is equal to n P (i) max; and S2, the difference value delta T between temperature of indoor environment and set temperature of an indoor unit is judged. According to the air-conditioner outdoor motor control method, the rotation speed of the starting stage of the outdoor motor is set to be from low to high, and therefore the noise and the vibration are not easily produced in the process of the starting to the high rotation speed of the overall unit, and use comfortable sensation of users is improved.

The invention provides a feeding valve mechanism and a valve pump using the same. The feeding valve mechanism comprises a valve (1) and a valve tube (2), wherein the valve (1) comprises a discharging guide part (11) enabling the internal space and the discharging space of the feeding valve mechanism to be communicated in a one-way mode, a feeding guide part (12) enabling the internal space and the feeding space of the feeding valve mechanism to be communicated in a one-way mode, and a supporting part (13) supporting the discharging guide part (11) and the feeding guide part (12); the valve tube (2) comprises a valve tube opening part (21) matched with the supporting part (13) to achieve material exchange between the internal space (B) of the valve tube (2) and the internal space (A) of the valve (1), and a valve tube body part (22) which is of a telescopic structure and capable of extruding materials out from the internal space (B) of the valve tube (2) and sucking materials in from the internal space (B) of the valve tube (2).

An improved method for avoiding mid-air collision in aviation is disclosed. The method relies on a calibration of radio signal intensities I with radio signal encoded position information L. In other words, after a first reception of a radio signal S advantageously comprising remote aircraft position information L, the radio signal intensity I is measured and a correction factor C is derived. During a next encounter of the radio signal S, a second distance estimation d can be derived using the signal intensity I and the correction factor C. Preferably, relative positioning data is acquired together with the correction factor C and a plurality of correction factors for different relative positions is combined in an at least partly continuous correction function.

A for traceably determining an unknown optical path length of a sample in an optical measuring device comprises the steps of: providing a drop analyser connected to a standard spectrophotometer; providing a certified reference material contained in first and second closed high accuracy cuvettes; measuring absorbance of the certified reference material to obtain a first absorbance measurement for the first specified path length; measuring absorbance of the certified reference material for a second path length to obtain a second absorbance measurement; using a dropping device to drop a specified volume of the solvent on an optical surface so that the path length of the specified volume can be determined by reference to the first and second absorbance measurement; and using the dropping device to drop the same volume of sample as the specified volume of solvent on the optical measuring device.

The invention relates to a low-noise modular joint of a cooperative robot. The low-noise modular joint of the cooperative robot comprises an inner ring shell, a drive mechanism, a brake mechanism, a harmonic speed reducer, an outer ring shell and a joint servo driver, wherein the drive mechanism comprises a motor shaft, a motor rotor, a motor end cover, a motor shell and a motor stator; the brakemechanism comprises a friction plate, a mounting seat, a brake piece, an electromagnet and an elastic piece, the elastic piece drives the brake piece to move towards the friction plate, and the electromagnet attracts the brake piece to be far away from the friction plate; a drive end of the harmonic speed reducer is fixedly connected with the motor shaft, and a fixed end of the harmonic speed reducer is fixedly connected with the inner ring shell; and the outer ring shell is coaxially connected with the motor shaft, and is connected with a flexible end of the harmonic speed reducer. When a joint normally works, the electromagnet attracts the brake piece, therefore, the relative axial position of the brake piece and the friction plate cannot be changed, the brake piece and the friction plate cannot be scratched easily, and noise cannot be generated easily when the joint works.

The invention discloses an automobile braking material, comprising matrix 4~8%, low melting point metal 5~15%, inorganic binder 15~30%, polysiloxane 5~15%, fortifying fibre 15~35% and packing material 15~30%. The change of the friction coefficient of the braking material along with the change of the temperature approaches to zero, In addition, it also has advantages as high degree of porosity, low noise, no-harming to the mating plate and high abrasion resistance.

The invention provides a robot joint structure and a robot joint structure assembly method. The robot joint structure comprises a rocker arm and a base, the rocker arm comprises a mounting cavity, therobot joint structure comprises a driving motor, a wave generator and a reducer rigid and soft wheel member, and the wave generator is mounted to the reducer rigid and soft wheel member; the reducerrigid and soft wheel member is installed in the manner that a first part is fixed to the rocker arm and a second part is fixed to the base, and the reducer rigid and soft wheel member is located at afirst end opening of the mounting cavity; and the driving motor is inserted into the mounting cavity from a second end opening of the mounting cavity and is fixed to the rocker arm, and an output shaft of the driving motor is directly in matched transmission with an inner hole of the wave generator. By means of the robot joint structure and the robot joint structure assembly method, the output shaft of the driving motor is directly connected to the inner hole of the wave generator, the size of the robot joint structure can be decreased, and the designability of the applicable range and the volume is improved.

The heat emission module of the notebook computer is utilzied to lower the surface temperature of the chips inside the notebook computers. The heat emission module includes following parts. The fan is installed inside computer, including the first and second wind outlets. The air sucked by the fan is discharged through the first and second wind outlets. The first radiator is set at the first outlet, the bottom of the first radiator is contact with the chips for carrying out the heat exchange. The second radiator is set at the second outlet. The heat conducting structure is connected to the first radiator and the second radiator in parallel and utilized to transfer the heat from the first radiator to the second radiator.

The invention discloses a vulcanization method for producing a low-wear carbon fiber automobile clutch friction plate, comprising the steps of preparation of a mixed raw material, feeding and mold assembly, pressurization and heat vulcanization, pressure relief and part taking, blank post-treatment and inspection of a semi-finished product. By adopting an inorganic ceramic fiber material, the friction plate also has better thermal stability and lower thermal conductivity, and meanwhile, each raw material is proportioned by a proportioning machine, so that the proportioning of each raw materialis more accurate, and the preciseness of a vulcanization process is further guaranteed; in addition, the mixed raw material is screened before feeding and mold assembly; one-time hot-press forming isadopted in the hot-press machining process; heat treatment, grinding and polishing are performed on a blank after being formed; and finally, the semi-finished product of the friction plate is detected. Compared with a traditional friction plate vulcanization machining method, the vulcanization method of the invention is simple in procedure, saves the extra cost in the pre-forming process, improves the production efficiency, and improves the mechanization degree of production and machining.

The invention discloses a floating planetary gear train structure for a miniature precise planetary reducer. The floating planetary gear train structure comprises a planetary carrier, a high-speed sungear, a low-speed sun gear, a planetary gear set and an inner gear ring, wherein the high-speed sun gear is meshed with the planetary gear set, the inner gear ring is meshed with the planetary gear set, the planetary carrier is in a cage type structure, and the planetary gear set is arranged on the cage type planetary carrier in a floating mode to automatically adapt to the central distance and the matching clearance; the floating planetary gear train structure further comprises a gasket, and the two ends of the planetary gear set are correspondingly limited by the cage type planetary carrierand the gasket to limit the axial movement of the planetary gear set. The floating planetary gear train structure for the miniature precise planetary reducer is exquisite and compact in structure, aU-shaped stepped slot and an annular open slot are designed on the cage type planetary carrier, planetary gears are mounted on the U-shaped stepped slot in a rotating floating mode through pin shaftsand needle bearings so as to automatically adapt to the central distance and the matching clearance, so that the loads of all the planetary gears are uniform, the meshing transmission of the sun gear,the planetary gear and the inner gear ring is ensured, the operation is smooth, the noise and the temperature rise are reduced, the problems of blockage or unbalance are solved, and the reliability is high.

The invention discloses a shock-absorption base for a transformer. The shock-absorption base comprises square tube steel, H-shaped steel and a shock-absorption rubber plate, wherein the square tube steel is arranged in a lower part groove in the H-shaped steel; the shock-absorption rubber plate is arranged in an upper part groove of the H-shaped steel; fixed holes are symmetrically formed in the two ends of a transformer bottom plate, the square tube steel, the H-shaped steel and the shock-absorption rubber plate respectively; and the transformer bottom plate, the square tube steel, the H-shaped steel and the shock-absorption rubber plate can be fixedly connected by inserting fixed bolts into the fixed holes in sequence; multiple mounting holes are formed in the shock-absorption rubber plate; and a shock-absorption spring is connected with the upper part groove, positioned under the mounting holes, of the H-shaped steel. According to the shock-absorption base, the square steel is adopted to replace the conventional channel steel, so that the structural strength and the stability of the base are improved; the H-shaped steel with the shock-absorption rubber plate is arranged above the square tube steel, and the shock-absorption spring is arranged in the shock-absorption rubber plate, so that effective shock absorption can be realized, and relatively high nose in the running process of the transformer is avoided.

A liquid crystal display device 10 is provided with a TFT 19, a pixel electrode 20, a common electrode 23, an array substrate 11b, a CF substrate 11a, a detection electrode 38 provided on the CF substrate 11a, a drive electrode 39 provided on the CF substrate 11a, a driver 16 and a row control circuit unit 37b which are display drive units for supplying a scan signal Vscan and a data signal Vpix to the TFT 19 and driving the display, and a touch controller 48 for performing position detection control by supplying a drive signal Vdri to the drive electrode 39 and detecting a position detection signal Vdet outputted from the detection electrode 38, the touch controller 48 supplying the drive signal Vdri to the drive electrode 39 and driving the drive electrode 39 in at least a scanning write period in which the scan signal Vscan is supplied to the TFT 19 by the row control circuit unit 37b that is the display drive unit and the TFT 19 is driven.

The invention relates to a tensioning device for a traction mechanism, in particular a belt or a chain, comprising a lever arm (2, 19) over which the traction mechanism is guided and on which a tensioning spring is arranged with its one end, the other end of which tensioning spring is arranged on a spring holder (6, 21), by means of which the tensioning device (1, 18, 30) can be fastened to an external object, wherein a holding element (11, 22, 34), which extends from the lever arm (2, 19) to the spring holder (6, 21) and is detachably arranged on both said lever arm (2, 19) and said spring holder (6, 21), for holding the tensioning device (1, 18, 30) in a position with a preloaded tensioning spring (4, 20, 33) is provided.

The invention provides a synthetic friction material and a preparation method and application thereof. The synthetic friction material comprises the following components in percentage by mass: 8-10% of nitrile rubber, 0.9-3% of sulfur, 5-7% of boron modified phenolic resin, 10-14% of crystalline flake graphite, 8-10% of bauxite, 8-10% of wollastonite, 3-5% of diatomite, 6-7% of reduced iron powder, 12-15% of precipitated barium sulphate, 5-7% of pineapple leaf fibers, 6-8% of steel fibers, 2-4% of a coupling agent combination agent and 7-10% of inorganic mineral fibers. The sum of the mass percentages of all the components is 100%. The coupling agent combination agent comprises a silane coupling agent and an aluminate coupling agent. The invention further provides application of the synthetic friction material in synthetic friction materials for urban rail vehicles. The synthetic friction material provided by the invention has the advantages of environmental protection, high mechanical strength, low compression modulus, small dual wear, low abrasion and the like.

The invention discloses an open aluminum plate curtain wall which comprises two upper unit aluminum single plates, two lower unit aluminum single plates, an aluminum alloy stand column and two aluminum alloy cross beams. The vertical aluminum alloy stand column serves as a center shaft, and the two upper unit aluminum single plates on the upper side and the two lower unit aluminum single plates on the lower side are symmetrically laid to form an outer wall face. A stand column watching face for connecting the upper unit aluminum single plates with the lower unit aluminum single plates is arranged on one side face of the aluminum alloy stand column. A cross-shaped supporting body is formed by the aluminum alloy stand column and the aluminum alloy cross beams on the two sides of the aluminum alloy stand column. Multidirection aluminum alloy cross beam connecting pieces are further fixed in the aluminum alloy cross beams. The aluminum alloy stand column and the multidirection aluminum alloy cross beam connecting pieces are fixed through stainless steel bolts. The lower unit aluminum single plates are fixedly connected with the aluminum alloy cross beams through stainless steel self threading pins. The corresponding two upper unit aluminum single plates and the two lower unit aluminum single plates on the two sides of the aluminum alloy stand column are connected with the stand column watching face through stainless steel bolts. The surface of the stand column watching face is a sawtooth surface.

The invention discloses a high-impact environment-friendly V belt and a manufacturing process thereof. A manufacturing raw material of the high-impact environment-friendly V belt is composed of canvas, raw glue, wrapping cloth, chemical raw materials, wire ropes, primer, cushioning glue and cloth glue. Aramid fiber framework wire ropes imported from Japan are adopted, during work running, instantlarge power can be borne, the rotating power is five times that of a common V belt, the strength is three times that of a common V belt, in the running process, extension and shrinkage are avoided, the belt is suitable for multi-wheel rotation, meanwhile, during pressing wheel engagement and disengagement, noise is not prone to happening, during running work, when the belt collides with foreign matter and stops working, the belt has the beneficial effects that the friction coefficient is reduced, impact force borne by the belt is reduced, the phenomenon that a motor is burnt out, and the beltis broken is avoided, during running work, glue powder is not prone to appearing in the work face, and the ground environment is protected.

The invention discloses a low-noise oil-gas separation type cylinder head cover assembly. The low-noise oil-gas separation type cylinder head cover assembly comprises a cylinder head cover body provided with an inner cavity, a gas outlet pipe communicating an outer cover of the cylinder head cover body with the inner cavity, a labyrinth cover plate assembly arranged in the middle of the inner cavity, and an oil baffle plate arranged at one end of the inner cavity; the outer cover surface of the cylinder head cover body is provided with a gas outlet communicating with the inner cavity, a PVC valve hole and an oil filler cover hole; a downwards-concave water guiding groove is formed in the middle of the outer cover surface; a plurality of ignition coil mounting bases are arranged in the water guiding groove at intervals; the bottom surface, close to the oil filler cover hole, of the inner cavity is provided with an oil baffle plate mounting base; the inner cavity is internally provided with a first reinforcing rib connected with the ignition coil mounting bases; the end of the first reinforcing rib is provided with a second reinforcing rib connected with the first reinforcing rib, the bottom surface of the inner cavity and the side surface of the inner cavity; and the first reinforcing rib and the side wall of the inner cavity are provided with a plurality of sealing plate mounting bases. The cylinder head cover assembly has the function of flow guiding, liquid accumulated at the top of a cylinder head cover can be effectively discharged, the structural strength is high, theanti-vibration capability is good, the service life is long, and low-cost oil separation can be achieved.

The invention discloses a direct-current brushless motor structure for a mobile phone. The direct-current brushless motor structure comprises a rotor assembly, a stator assembly and an upper shell, wherein the rotor assembly comprises an eccentric weight, magnetic steel, an oil-retaining bearing and a yoke; the eccentric weight, the magnetic steel and the oil-retaining bearing are all arranged on the yoke; the stator assembly comprises a lower bracket, a coil, a revolving shaft and a driving chip with a Hall function; the coil, the revolving shaft and the driving chip with the Hall function are all arranged on the lower bracket; the rotor assembly is arranged on the stator assembly, and the oil-retaining bearing of the rotor assembly is matched with the revolving shaft of the stator assembly; the upper shell covers the rotor assembly and the stator assembly, and is connected with the lower bracket; and the lower bracket is provided with a plurality of through holes which are uniformly distributed. The direct-current brushless motor structure has the beneficial effects of capabilities of identifying the polarity of the magnetic steel and ensuring normal work of a motor, freeness from an electric brush, small size, less used components, simple production process, long service life, prevention of noise, and freeness from electronic interference.

The invention relates to a multifunctional ceiling fan. The multifunctional ceiling fan is characterized in that the ceiling fan comprises a fan body, a track frame, a fixing frame and a track motor,a roller is arranged at the upper end of the fan body, a slide rail is arranged at the lower end of the track frame, the roller is connected into the slide rail in a clamping mode, the track motor isfixedly connected to the track frame through the fixing frame, and the track motor is fixedly connected to the fan body; and the fan body comprises a fan blade, a rotating motor and a fan body frame,the fan blade is made of two layers of metal plates, an electric heating wire is arranged between the two layers of metal plates, the rotating motor is fixedly connected to the upper end of the fan blade, the rotating motor is fixedly connected to the fan body frame, and the roller is fixedly connected to the upper end of the fan body frame. The cover range of wind blowing by the ceiling fan is wide, every area in a room be blown, excessive concentration of the ceiling fan blowing area is avoided, and heat can be provided for the room in winter.

The invention discloses a novel two-sided dial wheel. The novel two-sided dial wheel comprises a dial wheel body, a stirring protrusion fixedly arranged on one side of the outer circumference of the dial wheel body, and a circular-arc-shaped driving protrusion fixedly arranged on the other side of the outer circumference of the dial wheel body. A toothed groove and a key groove communicating with the toothed groove are formed in the middle of the dial wheel body. The toothed groove is formed in the middle of the dial wheel body for replacing an original shaft hole, so that vibration and noise caused by loosening of a sliding component are not liable to occur, and adhering and damage can be prevented.

The invention belongs to the field of doors and particularly relates to a fireproof antitheft door which comprises a metal panel layer and a door core layer. The door core layer is provided with a cement layer and a perlite fireproof layer which are sequentially arranged from inside to outside. An iron net layer is arranged between the cement layer and the perlite fireproof layer. The thickness of the cement layer is equal to the thickness of the perlite fireproof layer. As the metal panel layer is filled with the cement layer and the perlite fireproof layer, a door body does not crack or deform easily when affected by external force, the service life of the door is prolonged, and criminal elements can be effectively prevented from breaking into houses.