920results about How to "Easy processing and assembly" patented technology

The invention provides a clamping and positing device capable of automatically aligning center and a using method thereof, relating to a tooling clamp capable of automatically aligning center and being used in a plurality of fields of mechanical manufacture, printing, surface coating, electronic assembly and the like. The device comprises a driving mechanism, a clamping mechanism, a guiding mechanism and a supporting mechanism, wherein, the driving mechanism comprises a driving device and a driving force transmission device; the clamping mechanism comprises a positioning board (5); the supporting mechanism comprises a base (7) and a fixed seat (10); the driving mechanism, the clamping mechanism and the guiding mechanism are supported by the supporting mechanism; the driving mechanism drives the positioning board (5); the guiding mechanism ensures that the positioning board (5) moves according to a guided movement route; thus, the positioning board (5) can clamp a piece (13) to be processed, and the central reference position of the piece (13) to be processed is automatically positioned on the station for positioning a centre (central line or central point). The device can automatically align center and eliminate central line / point position offset.

The invention relates to a flexible supporting mechanism for a reflector of a spatial optical remote sensor. The supporting mechanism comprises a reflector frame, and a plurality of external ring bosses B that are circumferentially and uniformly distributed and connected with an external ring of the reflector frame; wherein the remote sensor is connected with the reflector frame through the external ring bosses B; radial flexible ring knots and axial flexible ring knots are arranged on the external ring bosses; each radial flexible ring knot comprises two radial flexible knots; each axial flexible ring knot comprises two axial flexible knots; the radial flexible knots can offset a radial force suffered by the reflector through elastic deformation; and the axial flexible knots can offset an axial force suffered by the reflector through the elastic deformation. With the adoption of the flexible supporting mechanism for the reflector of the spatial optical remote sensor, effects of stress and deformation of a remote sensor body on the reflector can be effectively eliminated; the difficulty of installing and adjusting of the reflector is reduced; the rigidity of the mechanism is ensured, effects of environmental factors such as temperature fluctuation and gravity on a surface shape of the reflector can be effectively reduced; and the supporting mechanism has the advantages that the supporting mechanism is high in rigidity, good in temperature adaptability, and easy to process and assemble.

The invention discloses a miniature bionic flapping aircraft based on a single-crank and double-rocker mechanism, and belongs to the technical fields of machine design and aircrafts. The aircraft adopts a single-crank and double-rocker mechanism, wherein the single-crank and double-rocker mechanism comprises a single-crank mechanism gear, a left wing rocker, a right wing rocker, a left wing connecting rod and a right wing connecting rod; the single-crank mechanism gear is fixed on a frame and forms a rotation pair; one end of each of the left wing connecting rod and the right wing connecting rod is connected with the single-crank mechanism gear through a pin; the other ends of the left wing connecting rod and the right wing connecting rod are respectively and rotationally connected with the left wing rocker and the right wing rocker, so as to transmit power; an extending section is formed at the second end point of each of the left wing rocker and the right wing rocker; the extending section is connected with a flapping wing structure, so as to drive the flapping wing to perform flapping. The aircraft can basically eliminate asymmetry of the aircraft during flight, has a function of switching various flight attitudes, and meanwhile has the characteristics of compact structure, high flexibility, high compactness and low weight.

The invention discloses a single-substrate integrated terahertz front end. The single-substrate integrated terahertz front end comprises a dielectric substrate, an inputting waveguide micro-strip transition and a micro-strip air cavity; the micro-strip air cavity is the air cavity; the inputting wave micro-strip transition (a standard waveguide opening WR-15), a CMRC (compact microstrip resonant cell) structure micro-strip low-pass filter, a parallel double-frequency-doubling diode, a frequency-doubling matching branch knot, a local oscillator band-pass filtering device, a frequency-mixing matching branch knot, a frequency-mixing diode, a radiofrequency waveguide micro-strip transition (a standard waveguide WR-2.2) and an intermediate-frequency low-pass filtering device are sequentially arranged on the single-substrate integrated terahertz front end from left to right. The number of dielectric substrates is reduced; circuits are integrated on the substrate; the number of machined cavities is also reduced; the single-substrate integrated terahertz front end is easy to machine and assemble; designing and machining on the waveguide transition are reduced; and the size of the cavity is also reduced.

The invention provides a double-air-inlet range hood. The double-air-inlet range hood comprises a box body, an air deflector and a switch panel, wherein a smoke collection chamber is arranged on the inner side of the air deflector; an opening for communicating the smoke collection chamber with the outside is formed between the switch panel and the air deflector; a left air inlet and a right air inlet are formed in the base plate of the smoke collection chamber; a division board is arranged between the two air inlets; an air inlet seal plate is arranged on the back of the smoke collection chamber in a hinged mode; the air inlet seal plate is provided with a driving device for driving the air inlet seal plate to overturn; a group of smoke detection devices is arranged in each of the two areas, separated by the division board, of the smoke collection chamber, and the smoke collection chamber is further provided with a controller for controlling the driving device to adjust the overturning angle of the air inlet seal plate. The double-air-inlet range hood has the benefits that the left air inlet and the right air inlet are formed, inlet air of the left air inlet and inlet air of the right air inlet do not disturb with each other through the division board arranged in the middle, and the air inlet seal plate capable of overturning is arranged, so that the double-air-inlet range hood is simple in structure and reliable in action; the opening of the air inlets of the air inlet seal plate is automatically adjusted by detecting smoke concentration, so that the efficiency of the range hood is fully utilized, and the adaptability is good.

The invention discloses a terahertz subharmonic frequency doubling and mixing device based on a monolithic integrated circuit. The device comprises a fundamental wave input waveguide micro-strip transition, a CMRC structure local oscillator low-pass filter, a frequency doubling matching circuit, a four-die frequency doubling diode, a local oscillator matching circuit, a frequency mixing diode, a radio frequency matching circuit, a radio frequency input waveguide micro-strip transition, and a CMRC structure intermediate frequency low-pass filter. According to the terahertz subharmonic frequency doubling and mixing device based on the monolithic integrated circuit, on the one hand, the number of dielectric substrates is decreased, and circuits are integrated on one substrate, so that the number of cavities to be processed is decreased, and processing and assembling are easy; on the other hand, waveguide transitions to be designed and processed are reduced, and the cavity size is reduced.

The invention discloses an inside supporter of a uniform temperature plate, a production method and the uniform temperature plate. The uniform temperature plate comprises the following components: a shell, which consists of two shell covers that are mutually closed, and delicate tissues are arranged on an inner wall surface of the two shell covers; a plate, which is tabular, has two plate surfaces and is flatly arranged between the two shell covers; and two or more concavo-convex parts, which are arranged on the plate and distribute in the positions of the two plate surfaces; wherein the plate is also provided with two or more through holes respectively among the concavo-convex parts, and one part of the concavo-convex parts protrude to one plate surface position of the plate, and the other part protrude to the other plate surface position of the plate. The supporter is formed by punching the two or more concavo-convex parts and the two or more through holes on plank stuffs, thus having convenient assembly and processing as well as sufficient bearing strength by the punching molding.

The invention discloses a cylindrical type transverse magnetic-field permanent-magnet flux-switching linear motor, belongs to the motor field, and aims to solve the problems of a relatively low space utilization rate, a complex manufacturing process, large permanent magnet dosage and high cost of an existing transverse magnetic-filed permanent-magnet motor. The cylindrical type transverse magnetic-field permanent-magnet flux-switching linear motor comprises a rotor and a stator, wherein the rotor is arranged inside the stator, and the rotor linearly moves inside the stator in the axial direction; a radial air gap is formed between the rotor and the stator; the stator comprises m short stator modules which are uniformly distributed in the axial direction to form an m-phase motor; each short stator module comprises p stator units and a plurality of stator magnetism isolating rings; the rotor comprises a shaft, w first rotor iron cores, w second rotor iron cores and a plurality of rotor magnetism isolating rings, and the structures of the first rotor iron cores and the second rotor iron cores are in mirror-image symmetry along the x axis or the y axis.

The invention provides an improved angle adjusting mechanism for an endoscope. The improved angle adjusting mechanism for the endoscope comprises an angle adjusting steel wire, a center shaft, a steel wire rope turning wheel and a locking mechanism. One end of the angle adjusting steel wire is connected with a soft sheath of the endoscope, the other end of the angle adjusting steel wire is wound on the steel wire rope turning wheel, the steel wire rope turning wheel is arranged on the center shaft in a sleeved mode and fixedly connected with the center shaft, the two ends of the center shaft are located in locating holes in a handle of the endoscope, and the center shaft is fixedly connected with an angle adjusting handle. The locking mechanism comprises a fixed friction plate which is arranged on the center shaft in a sleeved mode and fixedly connected with the center shaft and an axial pressing mechanism which is movably arranged on the center shaft in a sleeved mode and can press the steel wire rope turning wheel onto the fixed friction plate. The steel wire rope turning wheel is arranged between the fixed friction plate and the axial pressing mechanism. The improved angle adjusting mechanism for the endoscope can meet the requirement of free positioning in the operation process, prevent misoperation from harming a patient, achieve conformance of the bending angle of the angle adjusting handle and the bending angle of the soft sheath, lead the soft sheath to be locked automatically at an operation position, and meet the requirement that an operator can operate the endoscope by one hand.

The invention relates to a redundant-driven friction stir welding parallel robot. A provided parallel mechanism can guarantee high rigidity and machining precision and has the advantages of being simple in associated movement, simple in structure, easy to machine and assemble, easy to control and the like. According to the technical scheme, the redundant-driven friction stir welding parallel robot is characterized in that the parallel mechanism comprises a movable platform, a rack and four branch mechanisms connected between the rack and the movable platform, wherein the first branch mechanism and the third branch mechanism are symmetrically arranged with respect to the movable platform, and the second branch mechanism and the fourth branch mechanism are symmetrically arranged with respect to the movable platform; the central hinging point of the first branch mechanism with the movable platform, the central hinging point of the second branch mechanism with the movable platform, the central hinging point of the third branch mechanism with the movable platform and the central hinging point of the fourth branch mechanism with the movable platform are evenly distributed around the movable platform and form 90-degree included angles with one another.

This invention provides a device for detecting an analyte in a liquid sample, comprising a cup body (7), a lid (1) and a base (15), wherein, said the cup body (7) comprises a liquid storage chamber (9) and a test strip groove locating in one side of liquid storage chamber, the storage chamber (9) and the test strip groove communicates each other through a small hole in the bottom of liquid storage chamber, the test strip groove is configured with a test strip plate, said lid being able to seal the opening of the cup tightly, said opening of cup being directly connected with the liquid storage chamber.

The invention relates to a spinning forming core mold device and a method of multi-functional complex longitudinal and transverse inner rib cylindrical components. Each combined core mold comprises anactive core mold and a passive core mold; and the transverse core molds are circular rings with bosses on the inner sides. The combined core molds acts independently, so that the combined core moldscan be formed without rib barrel-shaped components; the combined core molds and the transverse core molds are matched, and cylindrical components with transverse inner ribs can be formed; the combinedcore molds and the longitudinal core molds are matched, and cylindrical components with longitudinal inner ribs can be formed; and the combined core mold and the transverse core mold, the longitudinal core molds and the longitudinal core molds are matched, and cylindrical components with complex longitudinal and horizontal inner ribs can be formed. According to the spinning forming core mold device, the forming of the ribbed components and non-ribbed components with different types is realized; the transverse core molds are adjusted., the thicknesses of the longitudinal core molds are equal to the thicknesses of the longitudinal core molds, and the forming of the cylindrical components with different ribs and high longitudinal and transverse inner ribs is realized; and the device can effectively solve the problems that the core molds of the cylindrical spinning forming components with the longitudinal and transverse ribs are difficult to machine and demold, and has the characteristicsof being easy to machine and assemble, convenient to detach, multifunctional and the like.

The invention discloses a repeatable inner locking device for a magnetically levitated flywheel; the device mainly comprises a flywheel system, a locking transmission mechanism and a locking maintaining mechanism; the flywheel system mainly comprises a flywheel rotor and a flywheel stator shaft; the locking transmission mechanism mainly comprises a motor, a gearbox, a left bearing compression ring, a left bearing, a right bearing and a lead screw; the locking maintaining mechanism mainly comprises a lock head, a lock sleeve, a micro switch, a fixed seat, a damping washer, a reset spring, a position adjusting stud, a locking gland and a buffer rubber pad; according to the repeatable inner locking device for the magnetically levitated flywheel, the repeatable inner locking device is arranged in the center of the flywheel rotor, and is fixedly arranged on the flywheel stator shaft through a fastening screw; and the inner locking device protects the magnetically levitated flywheel system, and has the advantages of reusability, high reliability, small size, light weight, simple structure and the like.

The invention provides an integrated gas stove combined with an air energy water heater and a range hood, which can solve the problem in the prior art that the residual heat of oil fume in the cooking process of the gas stove is not fully utilized. The technical solution of the present invention is to include an air energy water heater, a gas stove, a range hood and a cabinet room, an air energy heat pump water heater includes a water tank, a compressor, a condenser, an evaporator, an expansion valve, and a working fluid circulation pipeline, The condenser, the expansion valve and the evaporator are connected by a working medium circulation pipeline to form a working medium circulation. The condenser is installed at the water tank to heat the water in the inner tank of the water tank. The range hood includes a fan, a suction duct, a suction The air outlet and the air exhaust outlet, the gas stove is arranged on the table top of the cabinet room, and the evaporator is arranged in the air suction channel. The present invention is a new design integrating an air energy water heater, a range hood and a gas stove, fully utilizes the residual heat of the oil fume to be transferred to the evaporator, saves electric energy and reduces costs.

The invention relates to an LED light source module, which belongs to the technical field of LED semiconductor lighting. The LED light source module comprises a light pervious cover, a lamp body, an end cap, a side reflecting plate, a top reflecting plate, an LED light source, a PCB and a sealing strip, wherein the PCB is connected at the top inside the lamp body, the LED light source is welded on the PCB at the top inside the lamp body through soldering tin, an inward concave structure is arranged on the lamp body, heat radiation bars are arranged outside the concave position, the top reflecting plate is installed at the top inside the lamp body, the light pervious cover is installed in a slot at the lower part of the lamp body, the sealing strip is arranged in the gap between the light pervious cover and the lamp body, the side reflecting plate 4 is installed in the slot on the side of the lamp body, and the end cap is connected and fixed at the two ends of the lamp body to form an enclosed cavity. The LED light source module has the advantages of novel, compact, reasonable and simple structure, convenient production, manufacture, processing and assembly and good interchangeability. The reflecting plates adopt high-reflectivity specular material to enhance the reflection of light rays and improve the light efficiency of the entire module. The heat radiation performance is good, and the service life of the lamp can be prolonged.

The invention discloses a miniaturized CTS flat panel array antenna. The miniaturized CTS flat panel array antenna comprises a radiation layer, a waveguide power dividing layer, a mode conversion layer and a feed network layer which are sequentially arranged from top to bottom, and is characterized in that the mode conversion layer comprises a first metal flat panel and a mode conversion cavity array arranged at the upper surface of the first metal flat panel, the mode conversion cavity array is formed by arranging n<2> mode conversion cavities according to an n*n mode, the feed network layer comprises 4<n> H-type single ridge waveguide power dividing networks, two rectangular waveguide-single ridge waveguide converters and an E-plane waveguide power divider, wherein n is an integer which is greater than or equal to 1, each H-type single ridge waveguide power dividing network is provided with an input end and four output ends, and the rectangular waveguide-single ridge waveguide converter is provided with a rectangular waveguide input end and a single ridge waveguide output end. The miniaturized CTS flat panel array antenna is small in size and simple in processing and assembling process on the basis of having wide frequency band, high gain and high efficiency.

The invention belongs to the technical field of optical measurement, and in particular relates to a super 360-degree rotating limiting mechanism of a two-dimensional tracking turntable. The mechanism comprises a limiting bulge arranged on a rotating body, and a limiting assembly that is arranged on a fixed base and used for blocking the limiting bulge so as to stop the rotating of the rotating body. The mechanism is characterized in that the limiting assembly comprises two rotating baffle blocks that are positioned on the movement rail of the limiting bulge and are mounted to the fixed base by hinging; the two rotating baffle blocks can only rotate in one direction and rotate in opposite directions so as to limit the rotating of the rotating body. With the adoption of the super 360-degree rotating limiting mechanism of the two-dimensional tracking turntable, the problem that the complexity and size of the existing limiting mechanism are greatly raised when the two-dimensional tracking turntable rotates over 360 degrees, and large difficulty is brought to assembling and debugging, is solved.

The invention relates to a technical field of electric pile manufacture for a flow battery. A special elastic plate adopted in the frame of every layer of the electric pile increases the sealing performance of every layer; a design proposal that an embedded guide plate is adopted in a main runner of electrolyte increases the service efficiency of battery materials like septum and electrode; a feeding method that multiple path main runners are parallel and horizontal is realized by adopting a drainage distribution plywood to equate the pressure at an entrance and an exit of electrolyte in different electrode cavities and equate the pressure of electrolyte at different entrances and exits in the same electrode cavity; electrolyte flows evenly on the surface of the electrode by adopting the structure of diversion trunking; the maximized area of support septum avoids cross inleakage of the anode and cathode electrolyte of the septum at the entrance and reduces the loss of self discharge; efficiency of assembling is increased by adopting a interlock location frame to locate the multilayer battery structure. The electric pile provided by the invention has the advantages of simple structure, convenient manufacture and installation, reliable sealing, even flowing and stable operation of the electrolyte.

The invention discloses a vibration exciter based on piezoelectric stack. The vibration exciter comprises a piezoelectric stack driver, a vibrating mechanism and a packaging structure, wherein the piezoelectric stack driver is fixedly arranged in the packaging structure, and an outside input signal is input to the piezoelectric stack driver through a connecting wire penetrating through the packaging structure to drive the piezoelectric stack in the piezoelectric stack driver to vibrate. According to the technical scheme, the piezoelectric stack is adopted by the driver, the driving force of the piezoelectric stack is large, the output displacement of the piezoelectric stack is low, and the maximum output frequency of the piezoelectric stack is larger than 15 KHz. When loaded by sine alternating voltage, the piezoelectric stack can periodically vibrate along with the changes of the voltage, infinitesimal axial displacement is produced, and electric energy is converted into mechanical energy to be output. According to the vibration exciter, the components are simple, the number of the components is small, space needed by the design is saved, the structure is very compact, machining and assembling are easy, and the vibration exciter has the advantages of being high in output frequency, small in vibration displacement and size and easy to assemble. The vibration exciter is suitable for a high-precision driving, high-frequency-spectrum resonance driving and high-precision detecting system.

The invention discloses a high-precision focusing mechanism for a space optical remote sensor, and belongs to the technical field of space remote sensing, and solves the problems that the existing focusing mechanism is complicated in structure and nonlinear in focusing amount, and increases the focusing control and assembly difficulty as a connecting rod mechanism is used as a connecting part. A driving part comprises a motor, a first coupler and a worm; an executing mechanism comprises an encoder, a second coupler, a bearing pedestal, a bearing, a worm gear, Hall elements, magnetic steel, a lead screw, a special-shaped nut, a screw, a linear bearing pedestal, a linear bearing, a sliding shaft, an adapting seat, a focusing lens assembly, a linear guide rail pair and a focusing base. The high-precision focusing mechanism adopts the worm and gear pair and the lead screw and nut pair to realize transmission, and the nut is used for directly driving the focusing lens assembly to move horizontally; the high-precision focusing mechanism is high in focusing precision and capable of linearly controlling the focusing amount.

A two-freedom-degree mobile decoupling parallel robot mechanism mainly comprises a movable platform, a fixed platform and two branches for connecting the two platforms. The first branch comprises movable pairs mutually perpendicular in three directions and two connecting rods connecting the movable pairs. One end of one connecting rod is connected with the fixed platform through the movable pairs, the other end of the connecting rod is connected with the other connecting rod through the movable pairs, and the other end of the other connecting rod is connected with the movable platform through the movable pairs. The second branch comprises a movable pair, two rotating pairs and two connecting rods for connecting the movable pair and the two rotating pairs, one end of one connecting rod is connected with the movable platform through the movable pair, the other end of the connecting rod is provided with the rotating pairs, the other connecting rod is arranged on a rotation axis of the rotating pairs, and the other end of the other connecting rod is connected with the fixed platform through the rotating pairs. The two-freedom-degree mobile decoupling parallel robot mechanism is simple in structure, and moving of the movable platform is completely decoupled, thus the control difficulty is reduced, the dynamic property is good, and the assembling property in machine is simple.

The invention provides an experimental platform for simulating ocean platform motion compensation and an experimental method thereof. The experimental platform is characterized by comprising a motion simulation platform, a motion compensation platform on the motion simulation platform, and a data acquisition processing and control device, wherein the motion simulation platform is a six-degrees-of-freedom parallel mechanism, the motion compensation platform is a three-degrees-of-freedom parallel mechanism, and the data acquisition processing and control device includes an attitude sensor arranged on the motion simulation platform, a PAC and a computer. The motion simulation platform is preferably a 6-SPS Stewart parallel mechanism or a 6-UPS Stewart parallel mechanism. The motion compensation platform is preferably a 3-SPS parallel mechanism, a 3-UPU parallel mechanism or a 3-RPS parallel mechanism. The experimental cost can be reduced, and the hidden danger of experiment on an ocean platform or ship can be eliminated. The experimental method of the invention is simple, easy to operate, and efficient.

The invention discloses a full reverse convection unsealed water tube boiler. Upper and lower center headers, laterally symmetrical water wall headers, a water wall tube, upper and lower laterally symmetrical convection bank headers, a convection bank, front, rear, upper and lower transverse headers, communicating tubes and the like are respectively communicated to form a radiation convective heating surface and a natural circulation water channel; furnace walls are constructed on the outer side of the water wall and the outer sides of a ceiling and the convection bank to form a hearth and a three-return flue, so that the volume of the hearth can be increased with the same boiler volume to facilitate fully burning and settling dust in a soot furnace; the water channel and a soot channel are subjected to full reverse convection transverse washing to facilitate improving the heat exchange effect and reducing soot formation on the convective heating surface; and because of an unsealed structure, the natural circulation is safe, reliable and small in flow resistance, the overall structure process is advanced, the manufacturing is simple, and large, medium and small tubes can be adopted to replace drums of various boilers, so the steel consumption can be reduced by 30 percent, the manufacturing efficiency can be improved by 40 percent, the power consumption can be reduced by 20 percent, the initial discharge concentration of the soot can be reduced by 70 percent; therefore, the boiler has obvious advantages of energy saving, consumption reduction and emission reduction.

The invention provides a two-degree-of-freedom piezoelectric driving device and an excitation method thereof, and belongs to the field of piezoelectric driving. The two-degree-of-freedom piezoelectricdriving device comprises four groups of identical piezoelectric beams, a substrate, a driving foot base and a driving foot. The two-degree-of-freedom piezoelectric driving device is simple in structure, and easy to manufacture. Each piezoelectric beam comprises two piezoelectric ceramic pieces and a metal baseplate. When a voltage excitation signal is applied to the piezoelectric beams, bending motion of the piezoelectric beams along the thickness direction can be realized. Through design of the voltage excitation signal for the four groups of piezoelectric beams, the direction and time sequence of the bending motion of the piezoelectric beams are controlled, and the driving foot is excited to realize two-degree-of-freedom swinging. Furthermore, friction force is taken as driving force for driving a mover to realize two-degree-of-freedom motion. The two-degree-of-freedom piezoelectric driving device provided by the invention has the advantages of simple structure, low cost, high displacement resolution and large stroke, and has wide application prospects in the fields of ultra-precision driving, positioning and the like.

The invention discloses a washing machine door lock. The washing machine door lock comprises a lock case, a rotating part hooked up with a door hook and a locking device for locking or unlocking the rotating part combined with the door hook; the locking device comprises a first limiting part formed with a lug with a first inclined surface and capable of sliding left and right, a second limiting part formed with a second inclined surface matched with the first inclined surface and capable of sliding up and down, a limiting biasing part for applying bias pressure to the second limiting part towards the first limiting part, and a locking rod capable of locking or unlocking the second limiting part under the control of the first control device; the rotating part drives the first limiting part to move left and right by use of a first connecting structure; the limiting biasing element pushes the second limiting part to slide towards the first limiting part by virtue of the matching of the first inclined surface and the second inclined surface. According to the washing machine door lock, the rotating part is locked or unlocked by virtue of the sliding matching of the first limiting part, the second limiting part and the locking rod so that the washing machine door lock can be opened or closed; the washing machine door lock is easy to manufacture and assembly, and good in stability.

A triangle device of computer knitting machine comprises a triangle bottom plate, and a needle triangle, a couple of needle selecting pin return triangles, and a couple of needle selectors which are respectively fixed on the triangle bottom plate, and a needle triangle, a turnover triangle, and a couple of needle selecting triangles respectively arranged on the triangle bottom plate, and a couple of density triangles on the triangle bottom plate. The invention is characterized in that the invention also comprises a herring triangle, a raising triangle and a couple of needle collecting triangles, wherein the herring triangle and the raising triangle are respectively fixed on upper and lower parts of the triangle bottom plate and at the middle, the needle collecting triangles are contacted at two sides of the raising triangle. The invention has the advantages that the inventive triangle device has simple structure, easy installment, and small volume or the like, while the operation resistance of knitting needle is reduced significantly and the machine head is driven flexibly, with low driving power and low cost.

The invention provides a magnetic flux modulate permanent magnet vernier motor with stator compose of an outer rotor, an inner rotor and a stator arranged in a motor housing in sequence from outside in, There are twelve outer rotor salient poles (2-1) on the inner surface of the outer rotor 2, and eight inner rotor salient poles (3-1) on the outer surface of the inner rotor (3) near the outer rotor side, close to the inner side of the stator. The surface has a round surface structure and is embedded with sixteen pairs of permanent magnets (3-2). The stator (4) is connected to the casing (1) byiron blocks (13). The stator core has six stator teeth on the circumference (4-1). ), and three magnetic flux modulation poles (4-2) are placed on each stator tooth, Armature winding (6) and direct current excitation winding (7) of three-phase centralized type with two pairs of pole pairs are simultaneously arranged in the stator slot. The invention has the advantages of increasing torque outputcapacity, torque density, speed regulating range and mechanical strength, and simple processing and assembly.

The invention provides a low-profile low-elevation high-gain circularly polarized electromagnetic dipole antenna for satellite communication, and belongs to the field of satellite mobile communication. According to the antenna, the electric dipole radiation arms are designed into specific fan shapes, so that the impedance bandwidth of the antenna is effectively expanded; the beam width of the antenna is expanded through the parasitic magnetic dipole, and the gain at the low elevation angle is increased; meanwhile, a novel AMC structure (an artificial magnetic conductor reflecting surface) is adopted and is suitable for an electromagnetic dipole antenna, the AMC structure is compact, the design is simple, and the profile height of the antenna can be effectively reduced; and an air layer is introduced between the dielectric substrate and the AMC, so that the impedance bandwidth of the antenna is widened, and the gain of the antenna is increased. Therefore, the overall size of the antenna is 0.48[lambda]0*0.48[lambda]0*0.054[lambda]0([lambda]0 is the working wavelength at the center frequency point of the antenna), and the antenna has the characteristics of miniaturization and low profile.

The bicycle with eccentric wheel shaft includes frame, front wheel and back wheel, hub, driving flywheel assembly on the back wheel shaft, etc. On the hub, there is eccentric shaft with constant eccentric distance. The hub includes hub barrel, ball bearing, locating ring and its cover plate with eccentric shaft installing hole and connecting screw for sync motion. The eccentric shaft is hollow stepped shaft with one hollow end, and one locking unit for the bicycle to change its motion locus is set outside the hollow section and connected via the pulling rope penetrating the hollow end of the eccentric shaft to the shift key on handlebar. When the shift key is pulled, the bicycle can complete speed variation for different road conditions. In addition, the hub has simple structure, easy manufacture and relaxed precision requirement.