107results about How to "Guaranteed mechanical strength" patented technology

The PEEK medical composite catheter comprises an inner layer, a middle reinforcing layer and an outer layer which are sequentially arranged from inside to outside, and the inner layer, the middle reinforcing layer and the outer layer are all made of PEEK materials; the middle reinforcing layer is formed by weaving PEEK lines in a staggered mode, connecting gaps are formed between the PEEK lines, developing units are embedded in the connecting gaps, and the developing units are arranged according to a limited path and form a specified developing graph, so that the developing effect is greatly improved, and the safety of the catheter in the using process is guaranteed.

The invention relates to the technical field of intelligent materials, and discloses a p-MXene conductive ink and BC reinforced polymer composite film and a preparation method and application thereof.The composite film comprises MXene and bacterial cellulose, the surface of the MXene is coated with waterborne polydopamine, waterborne polyurethane is embedded in the bacterial cellulose, and the surface of the MXene is coated with waterborne polyurethane; hydroxyl groups in the water-based polydopamine and amino groups in the water-based polyurethane form hydrogen bonds to connect the MXene with the bacterial cellulose. The composite film obtained by the invention has excellent mechanical properties and electrical properties, and also has comprehensive properties such as electromagnetic shielding and stress-strain sensing.

The invention discloses a cladding tube for a lithium cold space nuclear reactor and a preparation method of the cladding tube, and belongs to the technical field of cladding tube structures, and the cladding tube is of an interlayer structure formed by sequentially overlapping a first W-Re alloy layer, a first WSi2 coating, a SiCf / SiC composite material layer, a second WSi2 coating and a second W-Re alloy layer from inside to outside. According to the invention, the air tightness and corrosion resistance of the cladding tube are obviously improved, and the cladding tube for the lithium cold space nuclear reactor has the properties of strong toughness, light weight, corrosion resistance, sealing property and the like.

The invention provides a cellulose composite carbon aerogel and a preparation method thereof, and the cellulose composite carbon aerogel is prepared by taking cellulose nanofibers and carbon nanotubes as raw materials, mixing and dispersing the raw materials through dispersoid, and then preparing cellulose nanofiber / carbon nanotube composite carbon aerogel through bidirectional freezing, freeze drying and high-temperature carbonization. The invention also provides an application of the cellulose composite carbon aerogel in the aspect of a battery electrode, and the cellulose composite carbon aerogel has an ultra-large specific surface area and an excellent compression ratio under ultra-low density, and shows super-hydrophilicity, high electrochemical activity, good compression resilience, good structural stability and certain mechanical strength; and the method can be used for various electrochemistry-based water-based flow batteries. The invention solves the technical problem that the existing cellulose carbon aerogel is poor in compressibility and mechanical strength, and belongs to the technical field of batteries.

The invention provides an efficient composite diaphragm for hydrogen production through alkaline electrolysis of water and a preparation method of the efficient composite diaphragm, and belongs to the technical field of hydrogen production through electrolysis of water. The preparation method comprises the following steps: S110, dissolving a polymer raw material in a solvent, stirring and mixing to form a spinning solution; s120, preparing a polymer non-woven fabric from the spinning solution through a flash evaporation method; s130, the polymer non-woven fabric is sequentially soaked in a strong alkali solution and a metal chlorate or metal nitrate solution, and conductive inorganic particles are formed on the surface and in pore channels of the polymer non-woven fabric after roasting; and S140, repeating the step S120 and the step S130 for multiple times, and cleaning the membrane material to obtain the porous composite membrane. The polymer non-woven fabric prepared by adopting a flash evaporation method is used as a diaphragm framework, the thickness of the diaphragm is greatly reduced while the high mechanical strength of the diaphragm is ensured, and the resistance of the diaphragm is further reduced, and then conductive inorganic particles are grown on the surface of the polymer non-woven fabric and in pore channels by adopting an in-situ chemical deposition method. The preparation process is simple, and industrial amplification is easy.

The utility model discloses a telescopic anti-overturning automobile safety seat base. The telescopic anti-overturning automobile safety seat base comprises a base body, the anti-overturning assembly is arranged on the base body and can be adjusted in a telescopic and sliding mode in the front-back direction of the base body, and the anti-overturning assembly is configured to be used for being attached to the backrest side of the automobile seat in an abutting mode so as to achieve overturning resistance; the telescopic length of the anti-overturning assembly relative to the base body is controlled and adjusted through the telescopic sliding of the anti-overturning assembly relative to the base body, that is, the anti-overturning assembly can be correspondingly adjusted in a telescopic mode according to automobile seats of different sizes so as to ensure that the anti-overturning assembly can abut against and be attached to the backrest sides of the automobile seats of different sizes. Therefore, by the adoption of the automobile seat, the requirement for installation, attachment and overturning resistance of different automobile seats can be met, and meanwhile the problem that legs of children bend unnaturally when the automobile seat is installed and used backwards can be solved.

The invention belongs to the technical field of high polymer materials, and particularly relates to a black phosphorus polyether-ether-ketone modified antistatic composite material and application. The composite material comprises the following raw materials in parts by mass: 100 parts of modified polyether-ether-ketone, 3-8 parts of modified black phosphorus nanosheets, 0.5-3 parts of functionalized graphene quantum dots, 0.5-2 parts of an interface modifier, 0.5-1 part of an antioxidant and 1-3 parts of a processing aid. According to the material, the problem of high surface resistivity of a traditional PEEK material is solved, the material is endowed with excellent antistatic performance, and meanwhile, the original mechanical strength is kept. Through the improvements, the composite material shows important actual value and market prospect in the high-end application fields of automobile parts, engine accessories, power battery shells, charging guns, charging piles and the like.

The embodiment of the utility model discloses a narrow-flow-channel impeller structure and a compressor. The narrow-flow-channel impeller structure comprises a cover disc, blades, a first spigot and a shaft disc. The cover disc and the blades are of an integrated structure, the mechanical strength of the narrow-flow-channel impeller structure is guaranteed, in the manufacturing process of the narrow-flow-channel impeller structure, the whole formed by the cover disc and the blades can be positioned through the first seam allowance and the rotary disc, then a circle of full welding can be formed at the first seam allowance, and a welding groove formed in the shaft disc is combined, so that the narrow-flow-channel impeller structure is manufactured. The blades close to the outlet side can be subjected to slotting welding through the welding grooves. By means of the arrangement, TIG + SMAW welding can be used for completing preparation of the narrow-flow-channel impeller structure, the strength of the narrow-flow-channel impeller structure is guaranteed, sinking weld meat is good, burnthrough and non-fusion are avoided, all blade weld joints are qualified in flaw detection, the appearance quality is good, and the production efficiency is high.

The invention provides a preparation method of a PEM water electrolysis anode diffusion layer, which relates to the field of PEM water electrolysis. Titanium nanotubes with different pore sizes are selected, and the large-pore titanium nanotubes are used to transmit liquids, and the small-pore titanium nanotubes are used to transmit gases, so that the gas and liquid transmission in the PEM water electrolysis process is highly ordered, and good liquid and gas management functions are achieved; the surfaces of the titanium nanotubes and titanium powders are attached with noble metal ions, and then oxygen is introduced for calcination, so that the noble metal ions form an oxide grid structure and are attached and embedded in the surfaces of the titanium nanotubes and titanium powders, which has higher firmness, protects the titanium material from being oxidized in the water electrolysis process, and improves the conductivity and catalytic ability of the anode diffusion layer.

The application relates to the field of adsorbents, and discloses a LiLSX molecular sieve adsorbent and a preparation method thereof. The method comprises the following steps: 1) sequentially performing molding treatment, first drying and first calcination on a mixture of kaolin and NaLSX molecular sieve powder to obtain a first calcination product; 2) performing pre-wetting treatment on the first calcination product to obtain a pre-wetting product; 3) contacting the pre-wetting product with alkali and a silicon source or contacting the pre-wetting product with alkali and an aluminum source in the presence of water to obtain a contact product; 4) performing second drying and second calcination on the contact product to obtain a second calcination product; and 5) performing lithium ion exchange on the second calcination product by using an exchange solution containing lithium ions, and the amount of the NaLSX molecular sieve powder is 85% or more in weight based on the total weight of the mixture. The method can make the prepared LiLSX molecular sieve adsorbent have excellent adsorption performance and mechanical strength.

This utility model discloses a conical installation device for a cartridge filter in an air conditioning unit. The device comprises a top disc, hexagonal bolts, diagonal support rods, fixing rods (in three lengths), internal hexagonal screws, flat washers, and spring washers. This utility model uses a specialized tooling mold for positioning. The diagonal support rods, composed of three round steel pipes arranged in an isosceles triangle and welded into a conical structure, are finished with hexagonal bolts at the ends and secured with a handle locking device. The filter cartridge can be disassembled and assembled without any special tools. This solves the problems of deformation and air leakage caused by insufficient installation strength in cartridge filters, while also shortening installation and disassembly time, ensuring the air conditioning unit can be put into use quickly. It is particularly suitable for air conditioning systems in cigarette factories, welding workshops, and other similar fields.

A split type machining tool comprises a tool handle, a tool bit, a fastener and a spacer ring, the fastener and the tool handle are locked so that the tool bit can be fixed to the tool handle, the spacer ring is arranged on the fastener in a sleeved mode, at least one part of the spacer ring is located in the tool bit, and when the fastener and the tool handle are completely locked, the rear end face of the tool bit makes contact with the front end face of the tool handle; the cutter handle and the cutter head oppositely extrude the spacer ring in the axial direction so that the spacer ring can deform in the radial direction, and the outer side face and the inner side face of the spacer ring are in interference fit with the cutter head and the fastener correspondingly. According to the machining tool, the distance ring is arranged in the tool bit, the tool handle and the tool bit oppositely extrude the distance ring in the axial direction in the assembling process so that the distance ring can deform in the radial direction, the inner side face and the outer side face of the distance ring can tightly press the fastener and the tool bit correspondingly, and therefore close fit between the tool bit and the fastener can be achieved; therefore, the tool bit and the tool handle have good coaxiality, and the machining precision of the machining tool is guaranteed.

This invention relates to an adsorption tower and a gas nano-purifier. The adsorption tower includes an outer tube and an inner tube coaxially arranged within the outer tube. The outer tube has a first outlet on its wall. The inner tube includes an inlet section, an adsorption section, and a dust removal section connected sequentially from bottom to top. The inlet section has an inlet on its wall. The adsorption section is filled with adsorbent, and a first filter and a second filter are respectively provided at the connection points between the adsorption section and the inlet and dust removal sections. At least a portion of the sidewalls of the dust removal section is configured as a filter layer. Under purification conditions, the high-pressure gas to be treated enters the inner tube through the inlet, passes sequentially upwards through the adsorption and dust removal sections, enters the annular gap between the inner and outer tubes via the filter layer, and is discharged from the first outlet. Through this configuration, using a tube-in-tube structure with the outer and inner tubes coaxially arranged, the integration of the equipment is improved and its volume is reduced, achieving multi-stage purification of gas within a single component, including diffusion, deep adsorption, and precision dust removal.

The application discloses a wire outlet terminal suitable for a dry type variable winding and wrapped by an elastic insulator, which comprises a copper nut and a clamping plate. The copper nut is in a column shape and comprises a quadrangular body and a cylinder body. The end of the cylinder body is connected with a wire outlet head of the variable winding, thereby forming the wire outlet terminal of the variable winding. The clamping plate is provided with a square hole in the middle. The quadrangular body of the copper nut is embedded into the square hole, so that the copper nut is fixed on the clamping plate. After the copper nut is fixed, the clamping plate is fused with the elastic insulator as a whole. The application can strengthen and adapt to the elastic insulator wrapped winding.

The application relates to the technical field of forestry seedling raising and ecological restoration, and discloses a root guiding type full-biodegradable tree planting bag based on hybrid material modification and application, the tree planting bag is an integrally injection molded structure, the inner wall is provided with vertical root guiding edges, and the bottom is provided with a cross-shaped easy-to-crack line; the tree planting bag is longitudinally divided into an upper structure area and a lower degradation promoting area. The upper part is composed of PBAT / PLA and hybrid materials and has high strength and weather resistance; the lower part is composed of PBAT / PPC, hybrid materials and plant fibers and has moisture absorption and rapid degradation characteristics. The hybrid material is a composite in which nano-hydroxyapatite grows in situ on the surface of attapulgite. Through the synergy of the longitudinal gradient material and the physical root guiding structure, long-term shape retention during seedling raising and rapid disintegration of the bottom after planting are realized, the problems of seedling taproot and degradation lag are solved, the degradation products can adjust the pH value of the rhizosphere soil and provide phosphorus and calcium nutrition, and the afforestation survival rate is improved.

The application provides an electric core tray and an electric core transportation device, which are used for improving the strength of the electric core tray, avoiding failure of the electric core tray when the electric core tray bears the electric core, and reducing cost waste. The electric core tray comprises a bottom plate, a bearing part and a plurality of first limiting columns. The bearing part and the first limiting columns are both mounted on the same side of the bottom plate. The bearing part is used for bearing the electric core. The mechanical strength of the bearing part is less than the mechanical strength of the bottom plate. In a first direction, the plurality of first limiting columns are respectively located on opposite sides of the bearing part and are used for limiting the electric core. The first direction is parallel to the transportation direction of the electric core tray.

The invention discloses a tin-zinc-copper powder ultrafine powder batch preparation process, and relates to the technical field of metal powder preparation, and the tin-zinc-copper powder ultrafine powder batch preparation process comprises the following steps: dissolving tin salt, zinc salt and copper salt in deionized water, adding a complexing agent, and uniformly mixing to obtain a mixed metal salt aqueous solution; dissolving a rosin-based polyamine hyperbranched dispersant in an organic solvent to serve as an oil phase; slowly adding a mixed metal salt aqueous solution into the oil phase, and uniformly dispersing to obtain a water-in-oil microemulsion system; dropwise adding a reducing agent solution, and continuously carrying out heat preservation reaction for 0.5-3 hours after dropwise adding is finished, so as to obtain slurry containing alloy particles; and carrying out demulsification treatment, centrifugal separation, repeated washing and drying to obtain the surface-modified tin-zinc-copper superfine powder. Superfining of particles is achieved through confinement growth, synchronous co-deposition of multi-component elements is guaranteed, a homogeneous alloy phase is formed, component segregation is avoided, and a protective layer formed on the surface of the powder in situ endows the material with excellent oxidation resistance and good weld-aid wettability.

The invention discloses an anti-aging and anti-electromagnetic shielding cable and a preparation method thereof, and belongs to the field of high voltage and the technical field of materials, the anti-aging and anti-electromagnetic shielding cable structurally contains a polyurethane-polyethylene copolymer and a flame-retardant and anti-electromagnetic sheet composite carrier, contains a polyurethane chain segment which is connected with a polyethylene main chain through a covalent bond, has no interface separation risk, and has good anti-aging and anti-electromagnetic shielding effects. Polyethylene is resistant to acid, alkali and salt mist, a carbamate group in a polyurethane chain segment can capture free radicals generated by photooxidation and thermal oxidation of polyethylene, aging is delayed from the molecular level, and the flame-retardant anti-electromagnetic sheet composite carrier endows the cable with good aging resistance and anti-electromagnetic shielding characteristics; the lamellar structure of the sheet-shaped carrier can block heat transfer and combustible volatilization, and the lamellar structure and the sheet-shaped carrier synergistically improve the flame-retardant efficiency; the introduction of the flaky composite carrier not only endows functional characteristics, but also can be used as a rigid reinforcement phase, so that the wear resistance and the extrusion resistance of the cable are improved, and the loss of the cable in the dragging and construction processes is reduced.

The utility model discloses a monitor for golf real-time remote positioning, which comprises a monitoring camera body, the surface of the monitoring camera body is sleeved with a shell, the shell can slide back and forth on the surface of the monitoring camera body, the two sides of the shell are fixedly connected with supports, and the supports are fixedly connected with the monitoring camera body. The side, away from the shell, of the support extends to the bottom of the monitoring camera body and is fixedly connected with a sleeve plate, the bottom of the monitoring camera body is movably connected with a transmission rod through a bearing, the surface of the transmission rod is fixedly connected with a rotating wheel, and the bottom of the rotating wheel is fixedly connected with a sliding rod located in the sleeve plate. And the sliding rod is in sliding connection with the sleeve plate. According to the utility model, the housing slides back and forth on the surface of the monitoring camera body, the amount of light entering the camera is directly controlled, the housing moves forward to enlarge the shading area, overexposure or identification interference caused by direct sunlight is avoided, the housing moves backward to reduce the shading range, the amount of light entering is increased, and the imaging quality in a low-light environment is improved.

The present application relates to a kind of polyamide aerogel film with coordination-covalent double crosslinking network structure and its preparation method and application, with carboxyl-containing diamine, carboxyl-free diamine, diacyl chloride and blocking agent as raw material, solution polymerization is carried out in the presence of organic base, and the polyamide oligomer solution containing polymerizable double bond in end group is obtained;The purified and dried polyamide oligomer is dissolved in aqueous solution containing organic base, and metal salt is added to form coordination crosslinking hydrogel film, and double crosslinking network is constructed by initiating end group double bond polymerization by ultraviolet irradiation, and finally freeze-dried to obtain polyamide aerogel film.The polyamide aerogel film of the present application has high porosity, excellent flexibility and mechanical stability, can efficiently and selectively adsorb heavy metal ions in water body, and can be regenerated efficiently and recycled multiple times by mild acid desorption-alkali activation combined regeneration process, aiming at providing a kind of high-performance, low-cost and sustainable solution for water treatment and environmental remediation field.

This invention discloses an environmentally friendly automotive interior material and its preparation method, belonging to the field of automotive interior material preparation technology. This invention addresses the technical problem that the interlayer bonding strength and surface durability of existing automotive interior materials need further improvement. Specifically, it includes the following steps: uniformly coating a self-healing water-based surface layer slurry onto the surface of release paper, subjecting it to a primary heat treatment at 80-90℃ for 1-2 minutes, and then in-situ coating a modified texture-reinforcing layer slurry to obtain an upper composite layer. This invention first prepares a self-healing water-based polyurethane dispersion, mixes it into a texture-reinforcing layer slurry and a surface layer slurry, coats them onto release paper, and heat-treats them to form the upper composite layer. Simultaneously, water-based polyurethane foaming slurry is roller-pressed and permeated into polyester nonwoven fabric to form a lower composite layer. After the two layers are wet-stacked, they are formed by a three-stage gradient hot pressing, and the release paper is peeled off to obtain the final product. This significantly improves the interlayer bonding strength, surface durability, and long-term service stability of the automotive interior material.

This invention relates to the field of pharmaceutical formulation technology, specifically to a sustained-release formulation of rifabutin, and more specifically, to a sustained-release rifabutin formulation composition for treating Helicobacter pylori infection. The key technical point of this invention is that it uses a novel antibiotic for treating Helicobacter pylori infection as the active ingredient, supplemented with specific inactive ingredients, including a hydrophilic gel-type matrix sustained-release material, a swelling agent, a buoyancy aid, and a lubricant. Through the synergistic effect of the hydrophilic gel-type matrix sustained-release material, the swelling agent, and the buoyancy aid, the composition can rapidly swell in gastric juice and maintain a floating state, thereby significantly prolonging the residence time of the formulation in the stomach and upper small intestine. This invention solves the technical problem of conventional formulations having a short residence time in the stomach and requiring frequent administration to maintain an effective antibacterial concentration, achieving the goal of effectively eradicating Helicobacter pylori by reducing the number of doses while maintaining an effective concentration at the site of infection for a longer period.

The invention provides a flexible pressure sensitive element based on a spring-shaped polymer optical fiber, a preparation method of the flexible pressure sensitive element and a sensing system. In order to further improve the detection sensitivity of the polymer optical fiber sensor and the compactness of the device, the flexible pressure-sensitive optical fiber element provided by the invention comprises an elastic material substrate and a polymer optical fiber which are wound into a spring-shaped structure and shaped in a heating manner. The element is combined with an optical fiber sensing technology to realize high-sensitivity tactile sensing. When the structure is subjected to external pressure, the bending radius of the structure changes, and then the intensity of optical signals transmitted through the optical fiber is affected. The sensor provided by the invention has the characteristics of simple and convenient preparation process, low cost, high sensitivity, compact structure and adjustability, and establishes a corresponding relation between light intensity and pressure by measuring the change of light signal intensity of the optical fiber element under the action of the pressure, thereby realizing high-precision detection of the pressure.

The utility model relates to chain wheel technical field, and specifically is a kind of replaceable chain nest longevous chain wheel, including sprocket body, the sprocket body is equipped with multiple bosses, the boss is equipped with clamping block, the clamping block is clamped between gear block, the gear block is abutted between one end and boss, fastening bolt is penetrated in the clamping block, the fastening bolt is threadedly connected between adjacent gear block, two chain nests are equipped on the gear block, the gear block is fixedly connected with link key, the boss is equipped with keyway, and the link key is clamped between keyway;In use, gear block can be replaced according to chain nest wear condition, and entire sprocket shaft group or sprocket piece does not need to be replaced, not only can guarantee the mechanical strength and stress condition of chain wheel, but also convenient to replace, can be replaced in pit, single-piece weight is small, substantially improve maintenance efficiency, reduce labor intensity, reduce pit operation safety risk.

A condenser for separating low-molecular polymers in gas comprises a condenser body and a scraper assembly. The condenser body is of a coaxial sleeve structure and sequentially comprises an inner condensation pipe, a first outer pipe and a second outer pipe from inside to outside, an annular gas channel and an outer condensation water channel are formed respectively, and double-layer cooling is formed. The scraper assembly is arranged in the annular gas channel and comprises a rotatable annular support, a spiral scraper and a driving mechanism. Scraping parts matched with the outer wall of the inner condensation pipe and the inner wall of the first outer pipe in shape are arranged on the inner edge and the outer edge of the scraper respectively, polymer condensate on the two side wall faces is scraped in a synchronous rotating mode in the operation process, and scraped objects are conveyed downwards to the bottom through a spiral structure. In addition, a sealing pipe can be additionally arranged in the inner condensation pipe to form an inner condensation channel which is used for being communicated with an external circulating water cooling system, the sealing pipe is used for providing a channel for penetration of the output shaft of the driving mechanism, and the space layout is optimized. Cooling water sequentially flows through the inner condensation channel and the outer condensation water channel to achieve graded dual utilization.

This invention provides a lithium-ion sieve polymer composite membrane, its preparation method, and its application. The preparation method includes the following steps: mixing a lithium-ion sieve precursor, a hydrophobic polymer, a solvent, a hydrophilic monomer, and a photoinitiator to obtain a casting solution; casting the casting solution to obtain a wet film; photocuring the wet film, followed by drying and curing, and finally post-treatment to obtain the lithium-ion sieve polymer composite membrane. The preparation method of this invention introduces a hydrophilic monomer, integrating the polymerization and cross-linking process of the hydrophilic monomer into the cross-linking network of the hydrophobic polymer. This not only maintains the mechanical strength of the lithium-ion sieve polymer composite membrane but also improves the wettability of the membrane and exposes more active sites, thereby promoting rapid lithium adsorption. This results in a lithium-ion sieve polymer composite membrane with high mechanical strength, high adsorption capacity, high adsorption kinetics, and high selectivity.

The invention relates to the technical field of mechanical devices for preventing or buffering vibration or impact in electric switches, in particular to a triple box and a double-fracture column type direct current switch. The triple box comprises a box body, a rotating shaft is assembled in the box body in a rotating mode, a crank arm is installed on the rotating shaft, a rotation stopping key installation groove is formed in the peripheral face of the rotating shaft, a matched rotation stopping key is installed in the rotation stopping key installation groove, and the crank arm is matched with the rotating shaft through a shaft hole formed in the crank arm. A key groove corresponding to the rotation stopping key is formed in the hole wall of the shaft hole, the key groove at least extends to one side of the crank arm in the circumferential direction of the shaft hole, and the crank arm and the rotating shaft are in rotation stopping fit through the rotation stopping key. According to the triple box, rotation stopping between the rotating shaft and the crank arm can be achieved, relative rotation of the rotating shaft and the crank arm is avoided, meanwhile, large damage to the overall structure of the crank arm is avoided, the mechanical strength of the crank arm is guaranteed, and the service life of the crank arm is prolonged.

The utility model belongs to the technical field of rings, in particular to a ring connecting structure, which comprises a base and a rabbet, a connecting rod penetrating through the base from outside to inside is arranged at the bottom of the rabbet, a connecting piece fixed with the penetrating part of the connecting rod is arranged on the inner side of the base, and the rabbet and the connecting piece are components made of the same material. The bottoms of the connecting rods are connected with the fixed base through welding with the connecting pieces, and the number of the connecting rods is at least two; the first connecting hole is matched with the connecting rod, an automatic positioning function can be achieved when the first connecting hole and the connecting rod are in butt joint, positioning is not needed during welding, only the first connecting hole and the connecting rod need to be kept in a pressed state, and welding difficulty is reduced; meanwhile, the rabbet and the connecting piece are made of the same material, so that the mechanical strength and chemical compatibility after welding are guaranteed, the overall strength is higher, and the appearance is attractive.

The present invention relates to a motor, comprising a stator and a rotor arranged in the stator, wherein the rotor comprises a rotor core and a plurality of permanent magnets, the rotor core comprises a plurality of magnetic pole units uniformly distributed around the center of the rotor core, the magnetic pole unit comprises a first slot distributed in a V-shape, a permanent magnet is arranged in the first slot, and the first slot is symmetrical about the direct axis; the magnetic pole unit comprises a groove radially recessed inward from the outer peripheral surface of the rotor core, the groove comprises two opposite first surfaces and a bottom surface connecting the two first surfaces, the first slot is located between the center and the bottom surface of the rotor core in the radial direction of the rotor core, the planes where the two first surfaces are located intersect outside the rotor core, and the angle θ of the two first surfaces satisfies 40°≤θ≤55°. The motor of the present invention has excellent performance in heat dissipation performance, torque improvement, cost control, inductance characteristics, magnetic line transmission and weak magnetic speed expansion capability, and is suitable for a wide range of fields such as electric tools, air conditioning compressors, and electric vehicles.

The application discloses a copper-clad plate based on montmorillonite glass fiber and a preparation method thereof, and belongs to the technical field of copper-clad plates. The copper-clad plate is mainly prepared by replacing traditional glass fiber cloth with montmorillonite glass fiber cloth with a surface graphene film, so that the copper-clad plate has high conductivity, high thermal conductivity and mechanical strength, and is suitable for high-frequency communication, high-power electronics and other fields. The preparation process is simple, compatible with the existing production line, and has significant technical advantages and industrial application prospects.