54results about How to "Meet lightweight" patented technology

The invention discloses an eyepiece, a headset eyepiece system and a piece of micro-display headset equipment. The eyepiece comprises a first positive lens, a second positive lens and a third negative lens which are orderly arranged along the light; the first positive lens is provided with a first surface of a convex image space and a second surface of the convex image space; the second positive lens is provided with a third surface of the convex image space and a fourth surface of the convex image space; the third negative lens is provided with a fifth surface of a concave image space and a sixth surface of the concave image space. Lens combination of spherical glass and aspheric plastic is rationally designed according to an optical system in the technical scheme, so that images of chromatic difference of magnification, field curvature and astigmatism aberration are thoroughly corrected when a wide range angle is obtained, and the imaging quality of the system is guaranteed; and the technical scheme further meets the requirements on miniaturization, light weight and wide range angle.

The invention discloses a semisolid forming method for an aluminum-base composite material creeper tread of a special vehicle and a forming mold thereof, which relates to a semisolid forming method for a creeper tread and a forming mold thereof. The invention solves the problems that the creeper tread prepared from steel is heavy, can not be formed easily by forging, and can not guarantee the performance of the creeper tread by casting. The method of the invention comprises the following steps: (1) wrapping pretreated SiCp with aluminum foil and then putting into a stirring crucible for heating and insulating; and (2) pouring 2A50 aluminum alloy into the stirring crucible in step (1) to prepare the semisolid blank, then pouring the semisolid blank into the forming mold, pressurizing and forming. The forming mold is manufactured from an outer male mold, an inner male mold, a female mold and a mold core from top to bottom sequentially and integrally. The workpiece made by the method has good performance, lightened weight, improved wear resistance, one-time forming and high production efficiency. Compared with the creeper tread workpiece formed by liquid forging of aluminum alloy, the wearing capacity of the aluminum-base composite material creeper tread of the invention is reduced by 50%-70%.

The invention discloses an ultrathin halogen-free flame retardant polycarbonate film and a preparation method thereof. Materials of the ultrathin halogen-free flame retardant polycarbonate film comprise 45% to 99% of polycarbonate resins, 0.5% to 40% of halogen-free flame retardant, 0.1% to 2% of anti-drip agents, 0.2% to 10% of modifying agents and 0.2% to 3% of auxiliaries, the materials are fully and uniformly mixed through a high-speed mixer, the mixed materials enter into a twin-screw extruder from a feeding machine to be subjected to melt extrusion granulation, and granular materials enter into the extruder from the feeding machine to prepare the film. According to the developed ultrathin halogen-free flame retardant polycarbonate film, the flame retardant rating can reach to UL94 VTM-0 grade in a thickness range from 0.025mm to 0.100mm, the relative heat resistance index can reach to 80 DEG C to 130 DEG C, and the ultrathin halogen-free flame retardant polycarbonate film is stable in performances and environment-friendly.

The invention discloses a chassis air spring, which is characterized in that the bottom end of a capsule is press-mounted with the side wall of a piston, the upper end of the capsule is buckled and connected with an upper cover plate, a gas pipe joint and a locating stud are respectively arranged at one end of the upper cover plate, the gas pipe joint is hollow and communicated with the interior of the capsule, a bulge is arranged in the middle of the bottom end of the upper cover plate, an emergency stopping block is connected with the bulge, the whole piston is made of metal materials and has an integrated structure, and a bolt hole is arranged at the bottom end of the piston. By the above setting, the chassis air spring is lighter than the original steel spring plate and improves the damping effect simultaneously, thus meeting the requirements of the current vehicle technology for light weight and comfort and satisfying the requirements of vehicles for driving on roads with various complicated conditions.

The invention discloses a photoelectrical fire control system and method of an armed unmanned aerial vehicle. The photoelectrical fire control system comprises an unmanned aerial vehicle body, an electric source, an electrical pan tilt, a camera, a distance meter, a sensor, a computer, a firing angle adjusting mechanism, a communication module and a ground display and control platform, wherein theelectrical pan tilt controls the camera and the laser distance meter to catch, track and measure a target; the computer calculates firing elements according to received parameters by a solving hit method; and the adjusting mechanism and the unmanned aerial vehicle are used for executing the command to aim at the target. The photoelectrical fire control system disclosed by the invention has the beneficial effects of being compact in structure, small in size, high in accuracy and high in mechanism executing speed; the specific requirements for being light in weighting, and automatically and quickly aiming at and hitting the target of the fire control system of the unmanned aerial vehicle are well met; the working flow of the fire control system and the solving hit method are low in occupiedresources, and high in solving efficiency; and the requirements of the armed unmanned aerial vehicle for accurately measuring the target, precisely aiming at the target and precisely hitting the target are met.

The invention belongs to the technical field of converters, and relates to a high-power traction auxiliary converter. The high-power traction auxiliary converter includes a cabinet body which is internally equipped with four traction converters, two auxiliary converters, a control unit and a cooling unit. Two traction converters and one auxiliary converter are arranged on each of the two sides ofthe cooling unit. The control unit is located at the upper right of the cabinet body. The cooling unit cools the traction converters and the auxiliary converters at the same time. The four traction converters and the two auxiliary converters are integrated and used on the power centralized electric multiple units of a certain electric locomotive company to provide a suitable power supply for locomotive traction motors and auxiliary loads. The converter adopts a modular and symmetrical design, is small, light, sealed, highly redundant and highly integrated. The converter is simple and efficientin assembly and production, and can meet the design requirement for a lightweight and highly integrated whole locomotive. The structure space is greatly saved, the degree of integration is improved,and electrical interference is reduced.

The invention relates to manufacturing of a damping material, in particular to a method for preparing a TiNiCu shape memory alloy damping composite. A porous TiNiCu shape memory alloy is prepared, holes of the TiNiCu shape memory alloy are filled with metal Mg, and the TiNiCu shape memory alloy damping composite, namely, Mg/TiNiCu is prepared. The defects that in an existing porous TiNiCu shape memory alloy preparation method, the porosity, the aperture and the hole type are all hard to control; and an existing technology of introducing Mg into the porous alloy cannot be used for filling porous TiNiCu alloy with Mg, and the damping performance and other mechanical performance of an alloy product need to be improved are overcome.

The invention relates to a silicon carbide ceramic sucker and a preparation method thereof. The silicon carbide ceramic sucker comprises a sucker body and a sucker base connected with the sucker body,the sucker base is provided with an air channel and an air exhaust connector, the sucker body is made of porous silicon carbide ceramic, and the sucker base is made of compact silicon carbide ceramic. The sucker body and the sucker base are bonded together through an organic binder or a high-temperature inorganic binder. The porous silicon carbide ceramic sucker body and the compact silicon carbide ceramic sucker base are prepared through a gel casting method, and the porous silicon carbide ceramic sucker body and the compact silicon carbide ceramic sucker base are compounded through a bonding or high-temperature sintering process to obtain the silicon carbide ceramic sucker. The ceramic sucker prepared from the silicon carbide material has the characteristics of ultrahigh planeness (up to 1 micron), difficulty in deformation, high temperature resistance, good acid and alkali corrosion resistance and the like, and can meet the high-precision use requirements of integrated circuit manufacturing equipment.

The invention discloses a foldable portable wheelchair. The foldable portable wheelchair comprises a seat module, a foldable support module and a chassis module. The seat module comprises a backrest, handrails and a cushion, the handrails are arranged on the left side and the right side of the cushion, and the backrest is arranged at the back side of the cushion. The chassis module comprises a chassis body, front steering wheels, front wheel supports, a battery pack, back driving wheels and driving assemblies, the front steering wheels are arranged at the front end of the chassis body through the front wheels supports, the back driving wheels are arranged at the back end of the chassis body, both the battery pack and the driving assemblies are arranged inside the chassis body, the back driving wheels are connected with the battery pack through the driving assemblies, the top of the foldable support module is connected with the seat module, and the bottom of the foldable support module is connected with the chassis module. The foldable portable wheelchair has two states of the riding state after the wheelchair is opened and the carrying and storing state after folding; occupied space after folding is small, the foldable structure is simple and convenient, the foldable portable wheelchair is in a luggage-case shape after being folded, can be directly pulled, and is light and handy and portable, and the requirements of short-haul-trip riding instead of walk of crowd having difficulty in moving are fully met.

The invention relates to a wheel side driving device for a straddle type monorail vehicle. The wheel side driving device comprises a gearbox and a traction motor, wherein the traction motor is fixedly arranged at the input end of the gearbox, and the output end of the gearbox is used for being fixedly connected with a frame body of a bogie. The gearbox internally comprises a sun wheel, an inner gear ring is inlaid on a shell of the gearbox, a planet gear is arranged between the sun wheel and the inner gear ring, and a planet carrier of the planet gear is fixedly connected with a driving shaft for driving walking wheels of the bogie to walk; an output shaft of the traction motor is fixedly connected with the sun wheel and is arranged in the transverse direction of the frame body. By means of the wheel side driving device, a driving device of the monorail vehicle is laid out more reasonably, the transmission efficiency is higher, and the requirements for light weight and low energy consumption of the bogie are met. In addition, by means of the layout of the driving device, it is possible to install a side-rolling-resisting torsion bar on the bogie, and a basis is provided for enhancing stability of the current bogie of the straddle type monorail vehicle.

The invention belongs to the technical field of high-performance composite materials, and provides a high-filling-capacity polytetrafluoroethylene composite film and a preparation method thereof. Thehigh-filling-capacity polytetrafluoroethylene composite film provided by the invention is prepared from the following raw materials in parts by weight: 100 parts of polytetrafluoroethylene dispersionliquid, 30-300 parts of filler, 0-4 parts of dispersing agent, 0-4 parts of active agent, 0-4 parts of modifier, 0-4 parts of stabilizer, 0-2 parts of leveling agent, 0-2 parts of defoamer and 0-2 parts of antioxidant. According to the high-filling-amount polytetrafluoroethylene composite film provided by the invention, the filling amount of the filler can reach 30-80%, and the high-filling-amountpolytetrafluoroethylene composite film has the characteristics of large filling amount of the filler, excellent mechanical properties and good thermal dimensional stability.

The invention discloses a compound cooling ventilator with an interior self-adaption cooling circulation. According to the compound cooling ventilator, an impeller is arranged at the front end of a motor; an inner air duct sleeves the motor; the inner air duct is located behind the impeller and a clearance is reserved between the inner air duct and the impeller; rear guide vanes are arranged outside the inner air duct; a cooling ring is arranged in front of the rear guide vanes on the inner air duct; the cooling ring comprises a group of cooling holes; a cooling hole is formed in front of each rear guide vane; the cooling holes are strip-shaped; the length direction of each cooling hole is consistent with the airflow angle of the inlet of the corresponding rear guide vane; and the distance between each rear guide vane and the impeller is smaller than or equal to one time of the chord length of the root part of fan blades. Even for a new-generation electric locomotive with the speed of 200 kilometers per hour, the requirements of light weight, compact structure and low noise can still be met.

The invention discloses a light carbon fiber case integral forming manufacturing method. The light carbon fiber case integral forming manufacturing method comprises the following contents of pre-formation of guide rails and wedge-shaped parts; implementation of threaded installation holes, wherein the threaded installation holes are implemented through metal embedded parts, bottom installation holes are pre-machined in the metal embedded parts, and the metal embedded parts are precisely positioned on the forming surface of a case die through the pre-machined bottom installation holes; pre-formation of side face installation beams; case body lay-up; machining; surface metallization on the inner surface and the outer surface of the case body; and surface three-proofing treatment. According to the light carbon fiber case integral forming manufacturing method, reasonable split design is carried out, the guide rails, the wedge-shaped parts and side face connecting beams are pre-formed and then assembled with the case body die, overall case body lay-up and autoclave co-curing formation are carried out, the manufacturing difficulty is lowered, and the overall rigidity requirement of the case body is also ensured; many printed board assemblies need to be installed in the case body, a power supply component needs to be installed outside the case body, installation interfaces are many, the positions are compact, the high-precision requirement for installation positions and dimensions is met through the embedded part precise positioning technology, and the connecting strength is ensured.

The invention discloses a city rail train anti-rolling device, a city rail train bogie and a city rail train. The city rail train anti-rolling device comprises a first pull-pressing rod, a second pull-pressing rod, a first torsion arm, a second torsion arm, a first installation base, a second installation base and a torsion rod; one end of the first pull-pressing rod is hinged to one end of the first torsion arm, and the other end of the first torsion arm is hinged to the first installation base; one end of the second pull-pressing rod is hinged to one end of the second torsion arm, and the other end of the second torsion arm is hinged to the second installation base; the torsion rod is fixedly connected between the first installation base and the second installation base; a first extending part is arranged at the end, away from the first installation base, of the first torsion arm; and a second extending part is arranged at the end, away from the second installation base, of the second torsion arm. According to the city rail train anti-rolling device, the city rail train bogie and the city rail train, the structure is simple, an independent lifting limiting protective device does not need to be additionally arranged, anti-rolling and lifting limiting protection functions can be provided at the same time, the requirements for light weight and compact design are met, the overall weight of the city rail train is decreased, and the manufacturing cost of the city rail train is reduced.

The invention discloses a low-cost super-high-strength carriage board and a manufacture method thereof. The manufacture method comprises the following steps: molten iron is subjected to converter smelting and heated to 1,250-1,350 DEG C, then scrap steel is added, aluminum is added with a single slag process for deoxidization and alloying process, slag stopping during tapping is performed, bottom argon blowing operation is required for a ladle in a tapping process, molten steel is subjected to LF (ladle furnace) secondary refining after converter smelting, ferromanganese and ferrosilicon are added, an RH (Ruhrstahl Heraeus) process is performed for vacuum dagassing, the molten steel is sent to a casting machine for continuous casting, and a manufactured slab is subjected to reheating, descaling, rough milling, finish rolling, hot straightening, heat treatment, shearing, hardening and tempering, sampling, inspection and warehousing of finished products. Low-carbon composition design is adopted, elements for improving the hardenability are added moderately, the cleanliness of steel is improved, and the low-cost super-high-strength carriage board is manufactured through optimized control of heat treatment and hardening and tempering processes.

The invention relates to an ultra-light efficient electromagnetic shielding composite material and a preparation method thereof. The aerogel composite material is obtained by taking cellulose, a cobalt salt containing Co <2+> and an imidazole derivative as raw materials to prepare aerogel and then performing carbonization treatment. The mass of the cellulose accounts for 20-45% of the total mass of the cellulose, the cobalt salt containing Co <2+> and the imidazole derivative. The density of the aerogel composite material is as low as 0.023 gcm<3>, the shielding effectiveness under unit density is high, the average absorption coefficient of electromagnetic waves exceeds 0.77, meanwhile, the requirements of light weight, excellent electromagnetic interference shielding performance and internal absorption as a main shielding mechanism are met, secondary reflection pollution of electromagnetic waves caused by reflection can be effectively avoided, the problem that secondary reflection pollution is possibly caused by most electromagnetic shielding materials in the prior art is solved, and the electromagnetic shielding material has very wide application prospects in the fields of military equipment, space flight and aviation and civil electronic equipment.

The invention discloses hot-dip galvanized low-alloy high-strength steel with yield strength of 700Mpa and a preparation method of the hot-dip galvanized low-alloy high-strength steel. The hot-dip galvanized low-alloy high-strength steel comprises the following chemical components in percentage by weight: 0.07-0.12% of C; 0.2 to 0.5 percent of Si; mn: 1.1 to 1.5%; 0.02% to 0.06% of Nb; 0.06% to 0.12% of Ti; less than or equal to 0.020% of P; s is less than or equal to 0.012%; the content of Als is 0.02 to 0.06 percent; n is less than or equal to 0.006%, and the balance is Fe and inevitable impurities. The preparation method comprises the procedures of smelting, hot rolling, cold rolling and hot galvanizing. Through reasonable design of low-carbon, Nb and Ti microalloying components, hot rolling, cold rolling reduction rate and a hot dipping continuous annealing process are matched, a certain amount of temper mill extension is used, the precipitation strengthening effect of a steel plate is strengthened, and the hot-dip galvanized low-alloy high-strength steel which is uniform in structure, stable in mechanical performance, good in cold bending performance and high in corrosion resistance is obtained.

The invention relates to the technical field of spaceflight electric propulsion, in particular to a gas supply and insulation integrated structure of a space electric thruster. The gas supply and insulation integrated structure comprises a gas distributor and a gas circuit insulation structure, and the gas circuit insulation structure is fixedly welded in a positioning hole in the lower end of the gas distributor. According to the gas supply and insulation integrated structure, a gas distributor and gas circuit insulation structure integrated mounting and welding manner is adopted, so that the mounting difficulty is effectively reduced, the connection reliability is improved, the gas leakage risk is avoided, the pipeline breakage risk in the mechanical environment is eliminated, the reliability of the space electric thruster is greatly improved, the height and the space size of the thruster are effectively reduced, the weight is reduced, the number of parts is reduced, the machining cost is reduced, and the requirements of commercial spaceflight multiple users for the low-power space electric thruster for low cost, light weight and high reliability are met.

The invention belongs to the field of mining equipment and particularly relates to a mining high-voltage distribution switch circuit breaker electric propulsion mechanism which can be manually operated and automatically controlled. The mining high-voltage distribution switch circuit breaker propulsion mechanism comprises a circuit breaker and a box body, wherein a quick opening door is arranged on the box body, a crank and rocker mechanism for controlling propulsion of the circuit breaker is arranged at the bottom of the box body, and a gear-rack mechanism and an electric drive mechanism are arranged inside the box body. Propulsion of the circuit breaker and integration of manual operation and automatic operation on quick opening door closing are realized. On one hand, the requirement on miniaturization of a high-voltage distribution switch is met, and on the other hand, circuit breaker propulsion and quick opening door closing automation are realized.

The invention discloses a 3D printed curved surface conformal antenna liquid cooling cold plate structure, and aims to provide a liquid cooling cold plate with high curved surface conformal heat dissipation efficiency and high integral forming quality. According to the technical scheme, the center line of an inner flow channel is located on a halving curved surface in the thickness direction of acold plate base body; a liquid inlet and a liquid outlet communicate with each other along a liquid inlet flow channel and a liquid outlet flow channel correspondingly; the inner flow channel with a conical structure is formed at the termination end of the liquid inlet flow channel and the termination end of the liquid outlet flow channel; the cross section structure of a cold plate flow channel is designed into an oval main flow channel and a plurality of round micro flow channels by combining the overall structure characteristics of the cold plate and utilizing three-dimensional software; and selective laser melting 3D printing powder bed equipment is adopted, laser power is set to be 200-400 W, a laser scanning speed is set to be 1-5 m/s, high-energy laser beams are used for melting thin-layer powder laid on a powder bed in advance, and a 3D printing micro-channel cold plate is formed through layer-by-layer powder laying and layer-by-layer melting stacking, so that integrated forming from a three-dimensional die shape to a real object is achieved.

The invention provides a split type impeller. The root of a blade (3) is provided with an installation column (4) used for connecting a first hub (1) with a second hub (2), a first convex part (41) is arranged on an exterior cylindrical surface of the installation column in a protruding mode, the positions, corresponding to the first convex part, of a first fixing groove (11) and a second fixing groove (12) are set into groove face structures matched with the first convex part, an inner cavity of the installation column is detachably and internally provided with an adjusting block (5), and a guide groove (6) and a second convex part (7) are arranged between the adjusting block and the first fixing groove or the second fixing groove and matched in a sliding mode in the direction perpendicular to the axis of the installation column. The split type impeller is simple in structure, the design and production process of a mold is simplified, the installation angle of the blade can be changed by replacing the second fixing groove and arranging adjusting blocks different in position, new adjusting blocks need to be designed and manufactured, the whole impeller does not need to be replaced, the process is simple and convenient and the cost is saved.

The invention discloses a cantilever crane, an overhead working truck and a cantilever crane manufacturing method, relates to the field of engineering machinery, and aims to improve the structure of the cantilever crane and improve the bearing capacity of the cantilever crane. The arm frame comprises at least two nested arm sections. And at least one arm section comprises a first cover plate and a second cover plate. The first cover plate is constructed to be integral and comprises a first side plate, a top plate and a second side plate which are arranged in sequence; the first side plate and the second side plate are oppositely arranged, and the free ends, away from the top plate, of the first side plate and the second side plate are both convex or concave. The second cover plate is constructed to be integral and comprises a third side plate, a bottom plate and a fourth side plate which are arranged in sequence; the third side plate and the fourth side plate are oppositely arranged, and the free ends, away from the bottom plate, of the third side plate and the fourth side plate are configured to be convex or concave. The free ends of the first side plate and the third side plate are fixedly connected, and the free ends of the second side plate and the fourth side plate are fixedly connected, so that the first cover plate and the second cover plate define a closed contour.

The present invention provides a shutter using a recording medium case of an aluminum alloy plate satisfying all the characteristics required for the shutter. The switch is composed of: an aluminum alloy substrate containing Mg: 2.2 to 2.8% by mass, Mn: 0.35 to 0.55% by mass, and Fe: 0.1 to 0.4% by mass; A chromate film provided as a first layer on the surface of the outer side of the shutter of the above-mentioned recording medium case, the above-mentioned chromate film is provided so that the amount of chromium deposited is 5 to 50 mg/m2 in conversion; A film made of acrylate-modified polyester urethane resin is provided as the second layer on the outer surface of the device, and the film thickness of the film made of acrylate-modified polyester urethane resin is 0.5 to 3 μm. Inorganic microparticles having an average particle diameter of 10 μm or less are contained in an amount of 5 to 20 parts by weight relative to 100 parts by weight of the above-mentioned acrylate-modified polyester-urethane resin, so as to be 100 parts by weight of the above-mentioned acrylate-modified polyester-urethane resin. The oxidized polyethylene-based lubricant is contained in a proportion of 0.5 to 3 parts by weight.

The invention provides a triple drive axle. The two-axle final reducer is composed of a two-axle distributor and a two-axle reducer. The second axle transfer gear is an asymmetrical conical planetarygear differential, Carrie of planetary gear, first planet gear, Rear shaft gear, Front axle gear and differential lock between axles, the planetary gear carrier is vertically fixed to the shaft end ofthe input shaft of the second axle, the first planetary gear is rotatably mounted on the shaft end of the planetary gear carrier and meshes with the rear half shaft gear and the front half shaft gearrespectively to form an asymmetrical conical planetary gear train; The second axle reducer is a symmetrical conical planetary gear differential. The triple drive axle of the invention has a compact structure, and the whole vehicle is lifted to be lightweight; meanwhile, the problem of the complex split structure of the cylindrical gear planetary system in the existing distributor is solved, and the requirements of the whole vehicle arrangement and the off-road performance are met. The triple drive axle of the invention is characterized in that the structure of the triple drive axle is compact, the weight of the whole vehicle is lifted, and the problem of the complex split structure of the cylindrical gear planetary system in the existing distributor is solved.

The invention discloses a microporous high-expansion adhesive tape and a preparation method thereof. The microporous high-expansion adhesive tape is prepared from the following raw materials in partsby weight: 50-100 parts of raw rubber, 40-60 parts of a plasticizer, 10-15 parts of a composite foaming agent, 30-50 parts of a filler, 0.8-1.6 parts of a vulcanizing agent, 2-8 parts of a vulcanization accelerator and 6-12 parts of a vulcanization activator. The microporous high-expansion adhesive tape disclosed by the invention has the advantages of high foam expansion and small pore diameter; in addition, the pore size can be randomly adjusted according to the requirement of the sound absorption coefficient, the sealing performance is excellent, and the microporous high-expansion adhesive tape is a 2D type automobile cavity blocking material withextremely high application value.

The invention provides a thermal superconduction heat dissipation plate, a thermal superconduction radiator and 5G base station equipment. Heat dissipation main pipelines, liquid dropping pipelines, aheated side communication pipeline and a condensation side communication pipeline are distributed in the thermal superconduction heat dissipation plate; the heated side communication pipeline is positioned on one side which is adjacent to a heat generation device on the thermal superconduction heat dissipation plate; the condensation side communication pipeline is positioned on one side oppositeto the heated side communication pipeline; the heat dissipation main pipelines are connected between the heated side communication pipeline and the condensation side communication pipeline; the liquiddropping pipelines are positioned below the heat dissipation main pipelines one by one in sequence, one end of each liquid dropping pipeline is connected with each heat dissipation main pipeline, andthe other end is connected with the heated side communication pipeline; the heat dissipation main pipelines are gradually upwards inclined along a direction far away from the heated side communication pipeline; the heat dissipation main pipelines, the liquid dropping pipelines, the heated side communication pipeline and the condensation side communication pipeline mutually communicate and are allthermal superconduction heat dissipation pipelines; and the thermal superconduction heat dissipation pipelines are full of heat transfer working substances, wherein the heat transfer working substances comprise liquids. The thermal superconduction heat dissipation plate is favorable for improving heat dissipation efficiency and heat dissipation evenness.

The invention discloses a vehicle door anti-collision plate, a preparation method of the vehicle door anti-collision plate and a vehicle door, and belongs to the field of vehicle parts. The vehicle door anti-collision plate comprises thickness-reduced metal anti-collision plates and a fiber-reinforced body integrated with the metal anti-collision plates by a compression molding process. Accordingto the vehicle door anti-collision plate provided by the invention, by adopting the thickness-reduced metal anti-collision plates, the weight of the vehicle door anti-collision plate can be effectively reduced; and on the basis of reducing the weight of the vehicle door anti-collision plate, in order to improve the anti-collision performance of the vehicle door anti-collision plate, the fiber-reinforced body and the metal anti-collision plates are integrated by the compression molding process, and because the fiber-reinforced body has high mechanical performance, the vehicle door anti-collision plate has high strength and wear resistance. The vehicle door anti-collision plate provided by the embodiments of the invention can simultaneously meet the requirements of light weight and high mechanical performance, namely realizes higher anti-collision performance on the premise of reducing the weight.

The invention belongs to the technical field of precious metal storing equipment and particularly relates to a safe which comprises a safe body, a safe door and a locking mechanism; a putting openingis formed in the safe door; a sunshade is connected onto the safe door and can move in a sliding manner to open or cover the putting opening; the locking mechanism comprises a driving piece, a lock-uppiece and a propping piece; a locking piece is arranged on the safe door; when the driving piece drives the lock-up piece to move to a first preset position, the lock-up piece is locked to the locking piece and the propping piece props the sunshade to the putting opening, and the safe door and the putting opening are closed; when the driving piece drives the lock-up piece to move to a second preset position, the lock-up piece is locked to the locking piece and the propping piece avoids the sunshade, and at the moment, the putting opening is opened; and when the driving piece drives the lock-up piece to move to a third preset position, the lock-up piece is separated from the locking piece, and the safe door can be opened. A set of locking mechanism is arranged to simultaneously control opening-closing of the safe door and the sunshade and is reduced in occupied area to meet the development demands of light weight and small size of the safe.