75results about How to "Strong designability" patented technology

The invention discloses a double-sterilization-anti-sticking composite cross-linked coating as well as a preparation method and application thereof, and belongs to the technical field of functional polymer materials. The coating comprises the following raw materials in parts by weight: 5-30 parts of a cross-linkable release type multifunctional branched polymer and 30-95 parts of a cross-linkable functional polymer. According to the double-sterilization-anti-adhesion composite cross-linked coating, the advantages of contact sterilization, antibacterial factor release and adhesion resistance can be combined together, on one hand, the super-hydrophilic component can effectively prevent initial adhesion of bacteria and protein, and even if a small amount of bacteria fall into the surface of the coating, the contact sterilization component can effectively kill a small amount of adhesion bacteria; the formation of bacteria and biological membranes is avoided; in addition, the introduction of releasable antibacterial molecules can effectively enhance the antibacterial effect, and the purpose of deeply killing pathogens is achieved.

The invention discloses an ionic liquid modified polyimide nanofiber film and an air purification filter screen based on the ionic liquid modified polyimide nanofiber film, and belongs to the technical field of film filtering materials. The preparation method comprises the following steps: firstly, selecting a diamine monomer and a dianhydride monomer to carry out low-temperature polycondensation reaction, and then carrying out solvent replacement and freeze drying to obtain polyamide acid powder; dissolving the powder to obtain a polyamide acid spinning solution, preparing an ionic liquid / polyamide acid spinning solution on the basis, and carrying out electrostatic spinning to obtain an ionic liquid / polyamide acid nanofiber membrane; and finally, carrying out high-temperature thermal imidization treatment to prepare the ionic liquid / polyimide nanofiber membrane. The method is simple and efficient, the problems of low resistance, high pressure drop and the like of a traditional nanofiber film in air filtration are solved, development and application of the nanofiber film in the field of air filtration are further widened, and the nanofiber film has important scientific significance and application value in the fields of high-temperature filtration, gas adsorption and the like.

The invention provides a deep V-shaped ceramic matrix composite component forming device and method. The forming device comprises a bottom die, an outer die and an inner die. The outer die is connected to the bottom die; the inner mold is connected to the bottom mold, and the bottom mold, the outer mold and the inner mold are encircled to form a cavity for forming the deep V-shaped ceramic matrix composite component; wherein the inner die comprises a V-shaped main body die and a plurality of small-section dies connected to the V-shaped main body die, the plurality of small-section dies are arranged in the narrow opening position and are sequentially connected in the length direction, and the plurality of small-section dies are provided with die drawing angles in the length direction. The deep V-shaped ceramic matrix composite component can be formed and prepared, and demolding is convenient.

The invention relates to a heat protection structure of a dredging coupling semi-open type dissipation structure, which belongs to the technical field of heat protection of high-speed aircrafts and comprises a dredging structure shell, a dredging structure capillary core body, a dredging structure working medium, a semi-open type dissipation structure, a semi-open type dissipation working medium, a semi-open type dissipation structure exhaust pipe and a semi-open type dissipation structure control switch. Aiming at a local high-heating part of a hypersonic aircraft, on the basis of semi-active dredging type uniform-temperature heat protection, phase change heat absorption and discharge heat dissipation of an active dissipation working medium are combined, and heat absorption and dissipation ways are increased, so that the total heat amount is effectively reduced while the internal heat distribution of the structure is optimized, and the heat dissipation efficiency is improved. Internal heat control and management of the structure are realized through coupling of dredging semi-active heat protection and active dissipation, the problem of non-ablative heat protection in an extreme environment is solved, and a feasible heat protection technical approach is provided for performance improvement of high-speed aircrafts in the future.

The invention discloses an intelligent fiber-reinforced thermoplastic resin rib material and a preparation method thereof. The intelligent fiber reinforced thermoplastic resin rib material comprises a monitoring optical fiber, a continuous fiber woven sleeve and a continuous fiber reinforced thermoplastic resin prepreg winding layer, wherein the continuous fiber woven sleeve and the continuous fiber reinforced thermoplastic resin prepreg winding layer are sequentially arranged from inside to outside in the radial direction of the monitoring optical fiber. The fiber woven sleeve and the continuous fiber reinforced thermoplastic resin prepreg winding layer are bonded into a whole through a thermoplastic film sleeve wrapping the continuous fiber woven sleeve when the intelligent fiber reinforced thermoplastic resin rib material is subjected to hot melting; the monitoring optical fiber is wrapped by the continuous fiber braided sleeve, so that the melt of the thermoplastic film sleeve flowing into the continuous fiber braided sleeve is reduced, and the melt flowing into the continuous fiber braided sleeve is absorbed. According to the intelligent fiber-reinforced thermoplastic resin rib material, secondary processing does not need to be carried out on the surface or the interior of the rib material, and the body mechanical property of the rib material cannot be damaged. The preparation process is simple, the cost is controllable, and the survival rate of the optical fiber is high.

The invention discloses a rotational symmetry type oblique pressing resisting paper folding pipe collision energy absorption box, belongs to the technical field of collision energy absorption boxes, and solves the problems that an existing collision energy absorption box is large in initial collision load and low in energy absorption efficiency. The energy absorption box comprises at least one energy absorption box body, the energy absorption box body comprises a wall body, a plurality of energy absorption units are arranged on the wall body in the surrounding direction, and each energy absorption unit comprises a first polygonal paper folding unit and a second polygonal paper folding unit which are the same in structure. The adjacent first polygonal paper folding units and second polygonal paper folding units are alternately arranged in the forward direction and the backward direction correspondingly, and the two first polygonal paper folding units located on the diagonal line of the energy absorption box body are rotationally and symmetrically arranged. Through the diagonal staggered design, the top end corner making contact with the pressure head provides a supporting effect, the two side faces of the top end corner jointly bear loads and are sunken inwards, and therefore deformation occurs according to a preset complete diamond deformation mode with high energy absorption efficiency, and the oblique pressure resisting capacity is provided.

The present invention belongs to the technical field of mechanical parts connection, and specifically relates to a connection structure and connection method between a joint and a hollow rod, wherein at least one end of the joint has a conical outer end face, an inner support ring is provided on the outer movable sleeve of the conical outer end face, and the inner wall surface of the inner support ring is a conical inner wall surface that is opposite to the conical outer end face; a washer is provided on the joint, and the side surface of the washer abuts against the inner support ring and the side end surface of the hollow rod; a push nut is threadedly connected on the outer peripheral surface of the joint close to the end surface of the hollow rod; the fixing screw axially passes through the push nut and the end of the fixing screw is pressed against the washer; the maximum diameter d of the conical outer end face + the minimum wall thickness t of the inner support ring> the inner diameter s of the hollow rod. The structure of the patent of the present invention uses the method of pre-tightening the push screw to provide an adjustable radial pre-tightening force between the joint and the hollow tube, so that the joint is easy to install and disassemble, and has higher reliability under load conditions such as axial load, torque, bending moment, and internal and external pressure.

The utility model discloses a kind of metal composite material walkway plates, comprising: footpath cantilever support, footpath cantilever support is spacedly arranged multiple along the length direction of prefabricated beam, the fixed end of multiple footpath cantilever support is fixedly connected with prefabricated beam;Steel grating frame, steel grating frame is multiple, the length direction of each steel grating frame Two ends are respectively overlapped and fixed on adjacent two footpath cantilever supports;Continuous no-alkali glass fiber felt reinforced polyurethane rigid foam plate, polyurethane rigid foam plate is multiple, and it is flatly fixed on multiple steel grating frames;Guardrail, guardrail is fixed on the cantilever end of footpath cantilever support.The footpath step plate is combined use by steel grating frame and polyurethane rigid foam plate, can greatly improve the durability of footpath step plate, and has the advantages of light weight, high strength.

The utility model belongs to pipeline damping and noise reduction equipment technical field discloses damping and noise reduction device and pipeline system. The damping and noise reduction device includes damping structure and mass structure, a plurality of damping structures are parallel and interval setting, are provided with a mass structure between any two damping structures, are provided with microperforated array structure on each mass structure, are provided with first containing hole on each damping structure, and multiple first containing holes are used for containing connected pipeline. This damping and noise reduction device can combine local area resonance band gap damping mechanism and microperforated plate sound absorption mechanism, and through integrated design, the mass structure is combined with microperforated structure, realizes low frequency control vibration and wide spectrum noise control. The damping and noise reduction device can adaptively increase or decrease the number of mass structure and damping structure to form a spring-mass multi-degree-of-freedom resonance system, realize vibration control of multiple resonance frequencies without significantly increasing the structure weight, and ensure the damping and noise reduction effect.

The application provides a device and method for generating controllable flame sheet and flame ring in a planar shock tube, which comprises: an experimental section, a flame generating box arranged in the experimental section, and having a thin layer cavity for accommodating premixed combustible gas inside; a film covering both sides of the flame generating box, for sealing the thin layer cavity and breaking after being impacted by incident shock waves; a wire slot arranged on the flame generating box, having a preset geometric shape; and an ignition element embedded in the wire slot, for heating and igniting the premixed combustible gas; the flame generating box generates flame sheet or flame ring with preset disturbance in the same experimental section by replacing the component with different wire slot shapes. The application reduces the interference with shock wave propagation and flame evolution, thereby providing a reliable and flexible switching experimental platform for studying the compression, curling and stretching of flame interface under the action of incident shock waves.

The invention discloses a heat insulation and heat dissipation system for an aerostat solar cell array and a control method thereof. The invention relates to the technical field of solar cell thermal management, and comprises a plurality of sections of solar cell panels connected at the end, wherein the solar cell panels at both ends are attached to the skin of the aerostat, the solar cell panels in the middle section are flexible solar panels, and a movable heat dissipation device is arranged between the flexible solar panel and the skin of the aerostat; a driving assembly for driving the heat dissipation device to move along the radial direction of the aerostat is arranged at the bottom of the aerostat; a plurality of temperature sensors and a plurality of radiation sensors are also arranged on the solar cell panels; the control method uses the highest temperature of the solar cell array and the strongest radiation on the surface as criteria, which is conducive to timely heat dissipation and effective prevention of the high temperature area of ​​the solar cell, thereby ensuring the safe operation of the airship and the high performance output of the solar cell; a movable heat dissipation device is installed under the solar cell in the top area of ​​the aerostat, and is combined with a heat insulation layer, which can reduce the heat transfer of the solar cell to the airship capsule, and increase the channel for timely convection heat exchange between the high temperature area of ​​the solar cell array and the atmosphere.

The invention belongs to the technical field of aero-engine turbine rear cone design, and particularly relates to an aero-engine turbine rear cone vibration absorption structure which comprises a vibration absorption cavity, a communicating pipe, a baffle and a damping spring. The baffle is arranged in the vibration absorption cavity and divides the vibration absorption cavity into a communicating cavity and a damping cavity; damping holes are densely distributed in the barrier plate; the damping spring is arranged in the damping cavity and abuts against the portion between the side wall of the damping cavity and the baffle. The communicating pipe is connected between the vibration absorption cavity and the cone and communicates the communicating cavity with the outer wall face of the cone.

The invention relates to a copper foil for packaging and supporting an electronic component and a preparation method of the copper foil, the copper foil is provided with cavities, the cavities are prepared in a pattern electroplating mode, and the cavities are distributed in an array mode. The method solves the problem that the cavity is difficult to prepare in a printed circuit board factory, especially the problems that the thick copper foil cavity is difficult to etch, and the size of the etched cavity is difficult to control.

The invention belongs to the technical field of separation membrane preparation, and discloses a hollow fiber nanofiltration membrane for efficient interception of heavy metals and a preparation method of the hollow fiber nanofiltration membrane. The external pressure type hollow fiber nanofiltration membrane is high in flux, high in interception, high in selectivity, strong in pollution resistance and stable in structure, has the advantages of being excellent in heavy metal interception effect, stability, high in flux, good in pollution resistance and the like, and has wide application prospects in real scenes related to treatment of heavy metal wastewater such as industrial wastewater.

The application discloses a non-welding accessory connecting structure of a wind power tower drum, the wind power tower drum and a construction method thereof, and relates to the technical field of wind power generation equipment. Technical scheme points of the application are as follows: the application comprises a rooting piece for connecting with an accessory structure, a structural adhesive layer coated between a mounting surface of the rooting piece and an inner wall of a tower drum body, and a resin fiber composite material coating layer which is cured and formed to wrap a root part of the rooting piece and is fixedly connected with the inner wall of the tower drum body through the structural adhesive layer. The application can effectively disperse stress generated by accessory load, avoid a welding heat affected zone, welding residual stress and stress concentration at a welding toe, eliminate negative effects of welding of the accessory on fatigue strength of a main steel plate of the tower drum, and make the fatigue strength grade of the main steel plate not be reduced due to connecting details.

The utility model relates to rubber support technical field, concretely is a three -dimensional anisotropic shock attenuation rubber support, the utility model discloses a main body function layer and external protection layer, the external protection layer is covered in the outside of main body function layer, the main body function layer includes at least two corrugated stiffened sheets, and the rubber layer is arranged between two adjacent corrugated stiffened sheets, and the rubber layer and corrugated stiffened sheet staggered overlap, and the rubber layer is bonded together vulcanization between stiffened sheets, the external protection layer includes upper rubber protection layer, side rubber protection layer and lower rubber protection layer, and the periphery of rubber layer and corrugated stiffened sheet all and side rubber protection layer bond or vulcanization into a whole, the corrugated configuration form of support corrugated stiffened sheet that the utility model puts forward can make when support shearing deformation, and the effective shearing layer thickness of different directions can carry out different design, and the vertical deformation mode of support has changed, realizes longitudinal, lateral differentiating rigidity, yield force design, and realizes the vertical shock attenuation design.

This invention discloses a method and system for anisotropic patterning correction of wafer warpage, comprising: obtaining the target anisotropic curvature compensation value of the wafer to be corrected; calculating the target equivalent thin film stress value to be achieved by the stress balance layer based on the curvature compensation value, the mechanical parameters of the wafer substrate, and the preset thickness of the patterned stress balance layer; determining the geometric parameters of the patterned stress balance layer using a quantitative relationship model, based on the target equivalent thin film stress value, the intrinsic stress of the selected thin film material, and Poisson's ratio; and fabricating a corresponding patterned stress balance layer on the back side of the wafer to complete the warpage correction. By designing the patterned stress balance layer, the anisotropic control of the overall thin film stress state of the back stress layer can be achieved; curvature compensation, both in magnitude and direction, can be independently designed for warpage differences in different directions of the wafer, thereby adapting to and correcting various complex asymmetric warpage morphologies.

This invention relates to an intrinsically fluorescent polyester elastomer and its preparation method. The elastomer is copolymerized from vanillin-based aldehyde monomers with small-molecule cyano monomers and cyano-terminated polyethers or polyester diols via a Knoevenagel polycondensation reaction. By adjusting the molar fraction of the soft segment, a continuous transition from rigid fluorescent plastics to highly elastic fluorescent polyester elastomers can be achieved. The resulting material exhibits both high fluorescence quantum yield and high elongation at break, and can be applied in fields such as melt spinning, fluorescent anti-counterfeiting, and flexible optoelectronic devices.

The invention relates to an ionic liquid covalently grafted hexagonal boron nitride composite proton exchange membrane as well as a preparation method and application thereof. The ionic liquid covalently grafted hexagonal boron nitride composite proton exchange membrane is prepared from the following raw materials: Nafion resin and ionic liquid covalently grafted hexagonal boron nitride. The ionic liquid in the ionic liquid covalently grafted hexagonal boron nitride can convey protons to adjacent proton acceptors to complete proton conduction, so that the electrochemical performance of the composite membrane is improved; hexagonal boron nitride can improve the mechanical property and stability of the proton exchange membrane, through covalent grafting with the ionic liquid, uniform dispersion of hexagonal boron nitride nanosheets in a polymer matrix can be improved, the overall uniformity of the proton exchange membrane is improved, and meanwhile, the problem of unstable membrane performance caused by leaching of the ionic liquid is avoided; the proton conductivity, the mechanical strength, the antioxidant stability and the thermal stability of the proton exchange membrane are improved.

The present invention provides an intelligent one-button starting device, comprising a fixing seat, a locking tongue component, a locking assembly, a first motor component, a starting assembly and a power board, wherein the power board comprises a first power supply terminal group and a second power supply terminal group for outputting a starting signal; the starting assembly comprises an authentication module, and when the authentication module is triggered, the first power supply terminal group and the second power supply terminal group of the power board are enabled to output a voltage; the starting assembly and the locking tongue component are both slidably connected to the fixing seat, and when the starting assembly slides, the locking tongue component is pushed to slide to a locking position, and the first conductive circuit is turned on when the locking tongue component is in the locking position; the locking tongue component is locked in the locking position by the locking assembly, and when the first motor assembly is powered on, the locking tongue component is driven by the locking assembly to release the locking tongue component, so that the locking tongue component slides out of the locking position. The present invention is highly intelligent and achieves synchronous starting and unlocking functions, improves integration, simplifies structural design, makes operation more convenient and quick, and has high practicality.

The invention belongs to the technical field of deacidification of high-acid crude oil and distillate oil thereof, and particularly relates to application of a deep eutectic solvent in deacidification of crude oil and distillate oil thereof. The deep eutectic solvent provided by the invention comprises a hydrogen bond acceptor, a hydrogen bond donor and a cosolvent, the hydrogen bond acceptor comprises choline chloride and / or betaine, the hydrogen bond donor comprises one or more of p-ethylphenol, phenol, malic acid and maleic acid, and the cosolvent is water; the molar ratio of the hydrogen bond acceptor to the hydrogen bond donor is 1: (2-4). The deep eutectic solvent provided by the invention can efficiently remove naphthenic acid in crude oil and distillate oil, the deacidification rate can reach 90% or above, and the solvent can be recycled, is not easy to cause an emulsification phenomenon, and is environment-friendly. The method provided by the invention is simple to operate, convenient to use and suitable for deacidification treatment of high-acid crude oil and distillate oil thereof.

The invention discloses a flying wing type composite adapter for parallel double-star launching, the flying wing type composite adapter for parallel double-star launching adopts an integrated flying wing type flat configuration, and the flying wing type composite adapter for parallel double-star launching comprises a structural framework, an upper skin and a lower skin which are assembled to form the flying wing type composite adapter for parallel double-star launching; the structural framework of the flying wing type composite adapter for parallel double-star launching comprises a force bearing frame, connecting plates, longitudinal beams, cross beams and side plates. All the components are formed by integrally laying light fiber reinforced composite materials and independently curing and molding the light fiber reinforced composite materials. According to the flying wing type composite adapter for parallel double-star launching, the problems that a traditional multi-star parallel adapter is complex in structure, high in production difficulty, low in structural bearing efficiency and the like are solved, the flying wing type composite adapter has the advantages of being compact in structure, convenient to operate, light and the like, and the adaptability of the adapter to parallel double-star launching tasks is improved.

The invention relates to a maleimide resin composition resistant to a high temperature of 300 DEG C, a preparation method and a prepreg, and belongs to the technical field of manufacturing of hot-melt prepregs for structural composite materials. The maleimide resin can endow a maleimide system with a higher glass transition temperature, so that the designability of the maleimide resin resistant to the high temperature of 300 DEG C and the heat resistance and the high-temperature retention rate of a corresponding composite material are improved, and meanwhile, the thermoplastic resin is added for process regulation and control and dissolution thickening; the resin composition has the advantages of being resistant to the high temperature of 300 DEG C, good in manufacturability and the like, and is suitable for manufacturing of aerospace main bearing composite material parts.

The application provides a synchronous forming method of a two-dimensional multi-layer fabric, comprising the following steps: obtaining a fabric type and physical parameters of a two-dimensional multi-layer fabric to be knitted; wherein the fabric type comprises a rectangular cross-section fabric and a rotary cross-section fabric; the physical parameters comprise a fabric layer number and a fabric length; performing grouping processing on a knitting machine based on the fabric layer number to obtain a standard knitting machine with n spool layers in each group; wherein the number of groups of the knitting machine is the same as the fabric layer number; n is a positive odd number greater than 1; installing yarns to the standard knitting machine according to a preset scheme; and knitting the yarns by using spools based on the fabric type to obtain the two-dimensional multi-layer fabric to be knitted. The scheme can improve the knitting efficiency of the multi-layer two-dimensional fabric, and can meet the needs of adjusting the knitting angle of the inner and outer layers of the fabric, changing the thickness of the single-layer fabric, and designing the fabric.

The invention discloses a nonlinear vibration isolator with an electromagnetic damping and crank rocker mechanism. The nonlinear vibration isolator comprises a crank rocker, a base, a base rear cover, a first magnetic material and a second magnetic material, the first magnetic material and the second magnetic material are fixedly arranged on the base, connected with the base in a sleeved mode and embedded in a cavity, containing the rotor, of the base, and the base is screwed with the base rear cover. According to the vibration isolator, the non-linear form of rigidity and damping can be selected according to the working load, and electromagnetic damping has no frictional resistance, so that the vibration isolator has more excellent reliability and applicability.

The invention discloses a preparation method of a trifluoromethyl-substituted 1-aza-diene compound, which comprises the following steps: in an air atmosphere, adding potassium carbonate, diimine and trifluoroacetyl imine sulfur ylide into an organic solvent, reacting at 60-100 DEG C for 12-20 hours, and after the reaction is completed, filtering, washing and drying to obtain the trifluoromethyl-substituted 1-aza-diene compound. And carrying out post-treatment to obtain the trifluoromethyl substituted 1-aza diene compound. The preparation method is simple to operate, the initial raw materials are cheap and easy to obtain, the reaction can be carried out in the air atmosphere, the inorganic salt potassium carbonate is cheap, odorless and non-toxic, the reaction does not need to use a heavy metal catalyst and can be expanded to gram level, and the applicability of the method is widened while the operation is convenient.

The invention discloses an electromagnetic damping nonlinear vibration isolator with a double-coil structure. The electromagnetic damping nonlinear vibration isolator comprises a rigid structure and a damping structure which are matched with each other, the damping structure comprises a top cover, a first left limiting part, a first right limiting part, a first magnetic material, a first coil, a second right limiting part, a base, a second coil, a second left limiting part, a second magnetic material, a base connecting shaft and a part connecting shaft. The first left limiting component, the second left limiting component, the first right limiting component and the second right limiting component are arranged on the base. The nonlinear electromagnetic vibration isolator has the characteristics of damping nonlinearity, adjustable damping, function conversion and the like, and the reliability problem of a common nonlinear vibration isolator under the working condition of low-frequency large-amplitude vibration is solved through the damping end, so that the vibration isolator shows a better vibration isolation effect under the working condition of low frequency.

The application discloses a kind of quick forming impact honeycomb wave-absorbing composite material and preparation method thereof, it is related to electromagnetic wave-absorbing material and thermoplastic composite material manufacturing field.The weight parts of raw materials include as follows: modified additive 11-14 parts, isocyanate 12-18 parts, PPTA solution 40-60 parts, PA plastic film 100-150 parts, glass fiber 48-80 parts, ultra-high molecular weight polyethylene fiber 80-112 parts, wherein, modified additive is one or more of carbon black, carbon nanotube, carbonyl iron powder;The molecular weight of ultra-high molecular weight polyethylene fiber is 1 million-5 million.The application uses modified additive to dope and blend in PPTA solution, can obtain the aramid paper with higher wave-absorbing performance, and then make wave-absorbing aramid honeycomb core, improve the application of absorbent in wave-absorbing, meet the demand of high-performance product, simultaneously, in the last honeycomb board production link, use new isocyanate fast curing adhesive, shorten the forming time of honeycomb board from 8 hours to 1 minute, greatly improve production efficiency, save energy consumption.

The present invention discloses a method for in-situ testing of the corrosion resistance of coatings and a dedicated electrochemical probe. The method for in-situ testing of the corrosion resistance of coatings of the present invention can detect metal-based, ceramic-based, non-metallic material-based coatings and the like by directly adsorbing the probe on the surface of the coating to be tested with the help of negative pressure without destroying the coating, and can realize in-situ non-destructive testing of coatings and coating samples of in-service equipment, ensure the repeatability of the test results, and is suitable for corrosion resistance testing of various coating materials. The dedicated electrochemical probe has a simple device structure, strong designability, and a wide range of applications. In addition, it has the advantages of easy operation and high efficiency.

The invention provides a manufacturing method of a metal lining fiber full-winding composite material transmission shaft. The method comprises the steps that S1, a metal bushing is manufactured, wherein the metal bushing comprises an integrated middle thin wall part and an end connecting part used for being connected with a flange; s2, winding the metal bushing through the fiber rod impregnated with the resin; s3, vacuumizing treatment and high-temperature curing treatment are conducted in sequence; according to the composite material transmission shaft, the integrally-formed middle thin-wall part with the thin wall in the middle and the end connecting parts located at the two ends of the middle thin-wall part are manufactured through the aluminum alloy material, then the fiber full-winding technology is adopted, and the composite material transmission shaft is obtained; and meanwhile, the weight of the transmission shaft is reduced, the characteristic of high designability of the composite material is fully played, the composite material transmission shaft with high torsional strength is obtained, and the use durability and reliability of a connecting structure are greatly improved.