86results about How to "Guaranteed strength and rigidity" patented technology

The invention relates to a method for light weight of a 3D printing personalized external fixed supporting tool based on topology optimization. The method comprises the following steps of: step 1, scanning the limbs of an object to obtain data. Step 2, carrying out image segmentation and three-dimensional construction of the model to obtain a three-dimensional shell-like model of the surface of the limbs. Steps 3, carrying out surface modification treatment to construct a curved surface sheet of the outer contour of the limbs, and being imported to the computer-aided design software and beingtransformed to a shell-shaped curved surface model. Step 4, obtaining the initial finite element analysis result by using a finite element analysis software. Step 5, an iterative operation is designedon the basis of the optimization design of the sensitive algorithm. And finally, performing 3D printing to obtain the personalized external fixed supporting branch. The method combines the 3D printing technology to realize the optimized design and manufacture of the personalized external fixed supporting tool, not only can guarantee the effect of external fixation treatment of the supporting tool, meanwhile, the light weight design obviously improves the wearing comfort of the supporting tool, and can effectively reduce the medical cost.

The invention provides a backlight module and a liquid crystal display device. A liquid crystal module comprises a light panel, a backplane and a middle frame, wherein the backplane is located below the light panel, and a first vertical plate is located on the edge of the backplane and extends towards the light panel; the middle frame comprises a second vertical plate and a third vertical plate which are arranged on two sides of the first vertical plate and a first support portion which is vertically connected with the second vertical plate and the third vertical plate; a plurality of buckle protrusions which are arranged at intervals are arranged on the side face of the first vertical plate, and buckle grooves which are matched with the buckle protrusions are formed in the second vertical plate; the second vertical plate further comprises a drop proof groove which is located on the end portion and a guide arm which is connected with the buckle grooves and the drop proof groove. The liquid crystal display device comprises a panel and the liquid crystal module. According to the backlight module and the liquid crystal display device, fixation with no screw of a front frame and the backplane can be achieved, the work efficiency of a complete machine assembling factory is improved, and the product appearance is optimized.

The invention provides a preparation method of a titanium alloy thin-wall lightweight covering cap part. According to the method, a titanium alloy diffusion connection and superplastic forming processmethod is adopted, flat plate diffusion welding is firstly adopted, and then hot pressing superplastic forming is carried out, so that full diffusion connection of two layers of plates in a diffusionwelding area can be ensured. According to the method, gas is adopted for diffusion welding, so that the diffusion welding rate of 100% of formed parts can be ensured; during the flat plate diffusionwelding, sealing is carried out in a mode that a sealing groove is formed in a die, so that smooth air paths of hot-pressing superplastic forming can be guaranteed; the periphery of the prepared titanium alloy lightweight structure covering cap is preset in the form of a reinforcing frame, so that unequal thicknesses of an installation surface and a middle part can be realized, the strength and rigidity of the part are guaranteed, and weight reduction is facilitated; the diffusion welding rate of the covering cap is high, the requirement of light weight and high strength can be met, the integrity of the part is good, subsequent shape correction is avoided, and the forming precision is high.

The invention discloses a film-forming permeable waterproof material, and a preparation method and application thereof. The waterproof material comprises a component A and a component B. The componentA comprises sodium silicate, a surfactant, a reaction retarder, a reducing agent, a reaction promoter, an anti-freezing agent, a metal ion blocking agent, a surface enhancer, an antirust agent, a photoinitiator, a cross-linking agent, water and an acrylate emulsion. The component B comprises white cement, gypsum, silica fume, mineral powder, fly ash, citric acid, magnesium fluosilicate, magnesiumoxide, sodium silicate, a reinforcing component and fumed silica. The film-forming permeable waterproof material is suitable for various environments, can achieve a good waterproof effect on buildingstructures in any environment, and can form a seamless complete high-strength waterproof coating film to prevent leakage; large-scale machining is not needed, the production efficiency is high, the investment is small, the construction is convenient, heating and boiling are not needed, environmental protection and no pollution are realized, and the labor cost is greatly reduced.

The invention discloses a clamping device used for automatic welding of a bumper. The clamping device comprises a base frame. Two energy-absorption box clamping mechanisms and a girder pressing mechanism are arranged on the upper side of the base frame. The two energy-absorption box clamping mechanisms are separately located on the two sides of the base frame. The girder pressing mechanism comprises a downward pressing mechanism and a lateral pressing mechanism. The downward pressing mechanism comprises a supporting frame arranged on the upper side of the base frame and a jacking assembly arranged behind the supporting frame. The jacking assembly is connected with pressing beams and is used for adjusting up-down movement of the pressing beams. The pressing beams are oppositely arranged onthe two sides of the jacking assembly. Girder pressing assemblies used for pressing a girder on the upper sides of energy-absorption boxes are arranged on the pressing beams. The lateral pressing mechanism comprises a plurality of lateral pressing cylinders fixed to the upper side of the base frame. The lateral pressing cylinders are connected with lateral pressing blocks. Girder limiting blocks are oppositely arranged on the lateral pressing blocks. The lateral pressing cylinders are used for pressing the girder between the lateral pressing blocks and the girder limiting blocks. By adoption of the clamping device used for automatic welding of the bumper, automatic welding can be achieved, a weld joint can be formed at a time, the welding reliability is improved, and the labor productivityis improved.

The present invention provides a butt strap capable of ensuring necessary rigid strength and capable of realizing light weight and excellent processing. The butt strap has a plate-shaped main body of which an upper surface (2a) serves as a traveling surface of a wheelchair, and the plate-shaped main body comprises: a plate-shaped core formed by a thermoplastic resin material; and a reinforcing layer (7) formed by a fibre reinforced resin material pasted to at least an upper surface and a lower surface of the plate-shaped core.

The invention discloses a base frame of a clamping device used for automatic welding of a bumper. The base frame comprises a bottom beam and side beams fixed to the front sides of the two ends of thebottom beam. A C-shaped structure is formed by the bottom beam and the side beams. A plurality of bearing beams are arranged in the middle of the bottom beam and are located on the same side as the side beams. The front end of each bearing beam is connected to one side of a connecting beam. A base plate is fixed to the upper side of the bottom beam and the upper sides of the bearing beams. Secondconnecting plates are arranged at the two ends of the connecting beam. Positioner connecting plates are connected to the outer sides of the side beams. The base frame is formed by welding stiffened plates of the C-shaped steel structure and is compact in overall structure, attractive in appearance, and a sufficient internal space is reserved while the strength and rigidity are ensured; and a welding robot is used for welding so that a weld joint can be formed at a time.

The invention discloses a manhole device. The manhole device is arranged on a tank body of a tank car; a manhole is formed in the tank body; the manhole device comprises a manhole seat, a flange disc, a manhole cover and a loading and unloading hole cover; a through hole is formed in the middle of the manhole seat; a first end of the manhole seat is fixed in the manhole; the through hole is communicated with the tank body; the flange disc is fixed at a second end, relative to the first end, on the manhole seat; the manhole cover covers the second end of the manhole seat, and is fixed on the flange disc; a loading and unloading hole is formed in the manhole cover; and the loading and unloading hole cover is detachably fixed in the loading and unloading hole. By opening the manhole and opening the loading and unloading hole in the manhole cover covering the manhole, the loading and unloading hole is not opened on the tank body, so that the manufacturing of the tank body is simplified and the strength and the rigidity of the tank body are guaranteed.

The invention discloses a washing machine transmission device, a washing machine driving mechanism and a washing machine. The washing machine transmission device comprises a planetary gear train, a driving shaft and a driving shaft sleeve which is sleeved at the exterior of the driving shaft and is rotatably connected with the driving shaft, wherein the driving shaft sleeve comprises an input shaft sleeve and an output shaft sleeve; the planetary gear train comprises an inner gear ring and an inner gear ring holding sleeve which is positioned at the exterior of the inner ring and is fixedly connected with the inner gear ring; the input shaft sleeve and the inner gear ring are integrally molded; the inner gear ring holding sleeve and the output shaft sleeve are fixedly connected. The washing machine transmission device, the washing machine driving mechanism and the washing machine are simple in processing and convenient in installation, and can be used for effectively lowering the manufacturing cost.

The present invention proposes a hollow mandrel integral sand core casting mold for an ultra-long hollow camshaft, which includes an upper mold, a lower mold, and a resin sand integral sand core. There are multiple core supports set at certain intervals along the length direction. The core supports protrude 3-5 support arms along the circumferential direction. There is a cold iron. When pouring with the present invention, the resin sand integrated sand core is supported by the core support to ensure strength and rigidity, and will not loosen and break. Further, the core support on the resin sand integral sand core is melted and integrated with the hollow mandrel, thereby ensuring Casting of hollow mandrel; the integral sand core of resin sand is provided with a central vent hole to facilitate the venting of the cavity. The invention changes the positioning mode of the integral sand core in the lower mold cavity, thereby realizing the hollow mandrel casting of the super-long hollow camshaft, and controlling the reject rate within 3%.

The invention discloses medium-anti-impact polystyrene resin and a preparation method thereof. The resin is prepared from the following raw material ingredients in percentage by weight: 85 to 96 percent of styrene monomers, 1 to 6.5 percent of mixed rubber, 1 to 8 percent of flowing modifying agents and 1.5 to 7 percent of superfine powder, wherein the mixed rubber is prepared from two or three kinds of rubber in rubber with the solution viscosity being 140 to 190 cps, rubber with the solution viscosity being 70 to 100 cps and rubber with the solution viscosity being 20 to 50 cps. A polymerization method is used for replacing a mixing method to obtain the medium-anti-impact polystyrene resin; the cooperated effect of a PS body, rubber and ultrafine powder body is sufficiently achieved; onthe premise of ensuring the intensity, the consumption of the toughening agent rubber is possibly reduced, so that the intensity, the rigidity, the flowing performance and the luster degree of the product can be properly improved; the requirements of users on the medium-anti-impact product can be met; the mass production is easy.

The invention relates to a mounting structure for an automobile auxiliary frame at the front section of an engine cabin boundary beam. The mounting structure comprises the front section of the engine cabin boundary beam, an auxiliary frame mounting screwed pipe, an auxiliary frame mounting nut plate and a screwed pipe reinforcing plate. The three components of the auxiliary frame mounting screwed pipe, the auxiliary frame mounting nut plate and the screwed pipe reinforcing plate are mutually connected to form corners mutually, and are welded in reinforcing pieces together, and a reinforcing effect is formed in the X, Y and Z directions of the car body, so that the torsion of the mounting surface of an auxiliary frame during the running of the whole vehicle can be prevented, and torsion attenuation of mounting bolts of the auxiliary frame is prevented. Under the precondition that the function of structure installation is guaranteed, the mounting structure further has high strength value and high rigidity value of mounting point that a general structure cannot achieve.

The invention discloses an underwater manned testing door special for cleaning a slot of a steel gate of a hydropower station. The underwater manned testing door special for cleaning the door slot of the steel gate of the hydropower station comprises a box-type main body, an upstream panel and a downstream panel, wherein the rear side surface in the length direction is the upstream panel, and the front side surface in the length direction is the downstream panel; the downstream panel is provided with a mandoor, a side support, a main support as well as a plurality of flat pressing water inlets; the top of the box-type main body is provided with a lifting lug and a wire communicating pipe communicated with the inside; side column flat pressing water inlets are formed in side columns at two ends of the box-type main body; the inner wall of the upstream panel is provided with a plurality of longitudinal beams in the vertical direction; a U-shaped main beam is horizontally arranged between the two adjacent longitudinal beams; a base plate of each U-shaped main beam is fixedly connected to the inner wall of the upstream panel; the half side, close to the downstream, in the box-type main body is provided with a working channel communicating left and right; the bottom of the working channel is provided with holes facilitating underwater cleaning, and safety guardrails are arranged close to the holes. The underwater manned testing door special for cleaning the slot of the steel gate of the hydropower station, which is provided by the invention, can be used for solving the key technical problems of underwater photographing inspection and cleaning of the slot of the steel gate and total-travel passing inspection of a gate running orbit.

The invention discloses a blow molding panel. A plurality of recessed support touch points are distributed at the back of the panel. The blow molding panel is characterized in that the support touch points are distributed in a crisscross manner. The invention further discloses a folding table applying the panel. Compared with the prior art, the folding table has the advantages that firstly, the hollow blow molding panel is novel in structure by the aid of the crisscross support touch points arranged at the back of the panel, the rigidity and the strength of the panel can be ensured while the panel is quite thin, production cost is reduced, secondly, a foot stool is conveniently and firmly mounted by the aid of a first slot, a second slot and an elongated groove which are arranged at the back of the panel, the panel and the foot stool can keep fine evenness after being completely folded, and a plurality of folding tables are more easily stacked after folded.

The invention discloses an integrated power battery system of a high-power hybrid power locomotive, and relates to the technical field of rail transit. The system comprises two power battery devices,and each power battery device is provided with a water chilling unit. Each power battery device is provided with a first chamber and a second chamber which are arranged side by side. Each of the two chambers is divided into a battery compartment and an equipment compartment, and the battery compartment and the equipment compartment in the two chambers are obliquely and symmetrically arranged. A plurality of layers of battery chambers for accommodating power battery packs and a cooling liquid pipeline system communicated with the water chilling unit are arranged in the battery compartment. By implementing the technical scheme, the technical problems of long production cycle and high cost of the existing integrated power battery system can be effectively solved, so that the production cycleof the power battery system is shortened and the manufacturing cost of the power battery system is reduced through reasonable integrated layout of the power battery packs; and meanwhile, the temperature uniformity of the battery packs can be effectively ensured through the configured cooling liquid pipeline system, and the practicability is very good in practice.

The invention discloses a pre-twisted fitting for an aerial optical cable, relating to the field of electric power fittings. The optical cable comprises mounting brackets, movable assemblies, a supporting piece, a left fixing assembly, a right fixing assembly and an optical cable assembly. The supporting piece is fixedly arranged in the middles of the mounting brackets, and the two movable assemblies are movably installed on the mounting bracket on the two sides of the supporting piece. The left fixing assembly and the right fixing assembly are connected with the movable assemblies on the twosides respectively, the optical cable assembly penetrates through the left fixing assembly, the supporting piece and the right fixing assembly to be fixedly connected, and the supporting piece is fixedly connected with the left fixing assembly and the right fixing assembly through rigid springs respectively. Through the spiral line structure of the inner and outer double-layer twisted wires, the grip to the optical cable is improved, and the reliability of optical cable connection is ensured; and meanwhile, the wind resistance and the pulling resistance of the connected cable are improved while the rigid strength of connection is ensured, the optical cable is prevented from being broken due to too strong stress, and the service life of the optical cable is prolonged.

The invention belongs to the technical field of new energy automobiles, and in particular relates to a rotationally molded automobile chassis with a steel-structured framework. The rotationally molded automobile chassis comprises a chassis body, wherein the chassis body comprises a surface layer, the steel-structured framework and a central foaming layer; the central foaming layer is located in the inner cavity of the surface layer; the steel-structured framework is arranged inside the surface layer, and comprises an overall outline framework, as well as transverse rods and a vertical rod, all connected with the overall outline framework; reinforcing rib structures of protruding type and groove type are arranged on the upper surface and the lower surface of the chassis body respectively; inserts used for mounting parts are arranged on the chassis body. According to the invention, one-step rotational molding forming of the automobile chassis is achieved through the rotational molding technology, so that the manufacturing process is simplified, the manufacturing efficiency is increased, and the cost is lowered; the steel-structured framework has better buffering and shock absorption effects while the rigidity intensity of a conventional steel-structured chassis is kept; good acoustic insulation and heat insulation effects are achieved.

The invention discloses a mechanically clamped fir tree blade-root milling cutter. The mechanically clamped fir tree blade-root milling cutter comprises a fir tree shaped cutter body and eight rows of cutter grooves which are arranged in the cutter body, wherein two first cutter blades which are symmetrically distributed with respect to the center are arranged in the first row of cutter grooves starting with the end surface, the front cutter surfaces of the first cutter blades pass through the center, and the front angles of the first cutter blades are 0 degrees; two second cutter blades which are symmetrically distributed with respect to the center are arranged in each of the second row of cutter grooves, the fourth row of cutter grooves and the sixth row of cutter grooves, the front cutter surfaces of the second cutter blades pass through the center, and the front angles of the second cutter blades are 0 degrees; third cutter blades and fourth cutter blades which are symmetrically distributed with respect to the center are arranged in the third row of cutter grooves and the fifth row of cutter grooves; and two fifth cutter blades which are symmetrically distributed with respect to the center are arranged in each of the seventh row of cutter grooves and the eighth row of cutter grooves, and the front cutter surfaces of the fifth cutter blades pass through the center, and the front angles of the fifth cutter blades are 0 degrees. The mechanically clamped fir tree blade-root milling cutter has the advantages that the quantity of the cutter blades is reduced on the premise of realizing a complete processing profile and considering specialized processing sites, and the rigidity and strength of the cutter body are ensured to the greatest extent, thereby providing a guarantee for the rigidity of the cutter in a processing process and reducing the vibration stripes of the cutter generated due to vibration.

The invention relates to the water treatment industry, and especially relates to filtration of drinking water. The invention discloses a fastening and connecting method for a booster pump of a water purifier with a double-layer combined machine base. A water passing pipeline is connected in series with a front filter container, a plurality of filter containers including a reverse osmosis membrane filter container and the booster pump to form a filter channel; an upper module and a lower filter container bin are in contact fit and are connected through a loose joint device to form the double-layer combined machine base; a U-shaped cavity is arranged around the filter containers and serves as a discharged concentrated water storage cavity to be connected into a water return pipeline at the water inlet end of a water return electric control valve; a frame structure with a built-in water-passing electric control part is also arranged and is arranged in the facility cavity to form a double-cavity structure; one end of a bottom-layer rigid assembly pipeline communicated with related pipelines of the filter channel extends to the bottom of the facility cavity and is provided with a vertically upward pipeline interface which is in sealed butt joint with a downward related pipeline interface of the electric control part arranged at the lower part of a frame structure; and the frame structure is fixed in the facility cavity through a fixing device and is in contact with the cavity bottom of the lower filter container bin.

The invention relates to a roofing foam cement rigid heat insulation system. The system comprises a foam cement layer (1), wherein a bonding layer (4) is arranged on the bottom surface of the foam cement layer (1), a rebar layer (2) is arranged on the top surface of the foam cement layer (1), and the rebar layer (2) is coated with a concrete layer (3). The roofing foam cement rigid heat insulation system is good in heat insulation effect and high in strength.

The invention discloses a sweat-proof suspension ring, which comprises a suspension ring body, and the suspension ring body is sequentially pressed and pasted with a first reinforcement ring, a first sweat-absorbing breathable ring, an air duct ring, a second reinforcement ring and a second sweat-absorption ring from the inside to the outside. As for the air-permeable ring, humidity sensors are equidistantly arranged on the inside of the second sweat-absorbing air-permeable ring, vent holes are equidistantly arranged on the surface of the air duct ring, and a blast chamber is arranged in the middle of the air duct ring. The anti-sweat ring can automatically control the rotation of the motor according to the humidity on the surface of the second sweat-absorbing air-permeable ring, realizes the ventilation of the ring body, and prevents the outside of the ring from slipping due to excessive sweat. The ring can also play a good role in absorbing sweat and ventilating. The rigidity of the ring body can be guaranteed through the first reinforcement ring and the second reinforcement ring, so that the body of the ring body is not easily deformed, and the training effect is guaranteed. The structure is simple, convenient and practical.

The invention discloses a lightweight automotive middle channel. The longitudinal section of the middle channel is in a shape of a Chinese character 'ji', two sides of the middle channel are respectively connected with front floors of an automobile, the front floors on two sides of the middle channel respectively extend towards the middle of the middle channel and respectively form cavities with the middle channel, the two sides of the middle channel are respectively welded with the corresponding front floors, and the tail ends of the front floors are respectively welded to the middle of the middle channel. The lightweight automotive middle channel is light in weight and high in structural strength.

The invention discloses a novel automobile engine support surface processing technology. The novel automobile engine support surface processing technology comprises the following steps: using a stainless steel material with antioxidation and corrosion resistance to produce a stainless steel support, polishing a support surface, removing oil, cleaning, quenching, tempering and placing in an acidic solution, cleaning, drying and packaging. The processing technology solves the problems that the stainless steel automobile engine support surface is easily aged and corroded, and is influenced by vibration due to engine operation; and good anti-oxidizability, corrosion resistance and high temperature resistance are provided, the support intensity degree is ensured, and protection performance and application field of the stainless steel are greatly increased.

A cold rolling pipe manufacturing method for improving the roughness quality of the inner wall of a stainless steel seamless pipe for a power station boiler adopts a two-pass cold rolling deformationprocess to roll to obtain finished pipes for delivery, that is, an LG-80 or LG-110H cold rolling mill is adopted for cogging rolling and an SKW-75 high-speed cold rolling mill is adopted for rolling to obtain the finished products. Meanwhile, by optimizing parameters such as a roller device, a hole pattern and a core rod related to cold rolling deformation and taking measures such as increasing the diameter of the core rod, widening a hole pattern opening and reducing a movement gap, the cold rolling pipe making quality and efficiency of the stainless steel seamless pipe for the power stationboiler are improved. On the basis of meeting the technical requirements for cold rolling of the boiler pipe of the power station, the quality loss of the roughness of the inner wall caused by abnormalworking conditions such as "top punching" and "insufficient rotation" of a pipe blank is reduced, the yield is increased, and the production cost is reduced.

The invention discloses an air suction inverted twisting type single-sheet feeding device. The air suction inverted twisting type single-sheet feeding device comprises a sheet feeding table, and the sheet feeding table comprises a rack, a lifting mechanism and a sheet feeding plate; the rack of the sheet feeding table comprises a vertical plate in the middle and side supporting plates arranged at the left and right ends; the lifting mechanism is mounted at the back of the vertical plate; the sheet feeding plate is mounted on the lifting mechanism; a suction nozzle air guide tube and a cam driving shaft are horizontally mounted between the two side supporting plates; at least two suction nozzles which communicate with the suction nozzle air guide tube are sequentially mounted on the suction nozzle air guide tube in the length direction; the suction nozzle air guide tube is above the sheet feeding plate; the cam driving shaft is in front of the vertical plate; and a moving groove is formed in each of the two side supporting plates, so that the suction nozzle air guide tube can drive the suction nozzles to cross to the position in front of the vertical plate. According to the air suction inverted twisting type single-sheet feeding device, a scattered sheet baffle plate is vertical and rod-like, the rigidity and strength can be fully guaranteed, the front ends of sheets on the sheet feeding table are horizontal and consistent, wavy concave and convex parts are avoided, and the front ends of the sheets are synchronously bent according to the amount of elastic deformation and bow tension of the sheets.

The invention provides a cabinet system, which comprises at least one cabinet. The said cabinet comprises a top frame having first mounting notches at corners thereof respectively, and two first mounting surfaces which contact with the top frame is provided on the first mounting notches; a bottom frame having second mounting notches at corners thereof respectively, and the second mounting notcheswhich have two second mounting surfaces contacting with the bottom frame correspond to the first mounting notches one to one; upright posts for connecting the top frame and the bottom frame, and the said upright posts correspond to the first mounting notches one to one, the shape of the upright post installation position fits each mounting notch. A upright post is arranged between each first mounting notch and the corresponding second mounting notch, at this time, the upright posts are respectively and correspondingly connected with the corresponding first mounting surface and the corresponding second mounting surface. The cabinet system in the invention has the advantages of good overall strength and rigidity of the cabinet frame and convenient and flexible wiring installation.

The invention discloses a self-unloading compartment structure with a strengthened bottom plate and an auxiliary frame. The compartment bottom plate is included and comprises a bottom plate cross beam and a bottom plate longitudinal beam which are connected in a crossed manner. First bottom plate bodies and second bottom plate bodies are arranged above the bottom plate cross beam and the bottom plate longitudinal beam. A strengthening beam integrally extruded and formed through an aluminum alloy material is adopted at the bottom of each first bottom plate body. The first bottom plate bodies and the second bottom plate bodies are fixedly connected through friction welding, and the two adjacent second bottom plate bodies are fixedly connected through friction welding. An auxiliary frame is arranged below the compartment bottom plate, the front side of the auxiliary frame is connected with the compartment bottom plate through a jacking mechanism, and the rear side of the auxiliary frame is in pivot joint with the rear side of the compartment bottom plate through a rotation shaft. The auxiliary frame comprises a first frame longitudinal beam, a second frame longitudinal beam and a plurality of frame cross beams. The self-unloading compartment structure has the obvious effects that the strength and rigidity of the auxiliary frame are high, the impulsive force resisting capability of the bottom of the compartment is good, and the deformation resisting capability is high.

The invention discloses a flame-retarding and wear-resisting fabric. The flame-retarding and wear-resisting fabric is composed of a flame-retarding layer, a wear-resisting layer, a base layer and an air permeable layer which are arranged from top to bottom; the base layer is prepared from the following components in parts by weight: 20 to 50 parts of cotton fiber, 10 to 40 parts of soybean fiber, 3 to 15 parts of polyacrylonitrile fiber, 15 to 25 parts of Chinese hemp fiber, 2 to 15 parts of sodium hydroxyethyl cellulose, 3 to 8 parts of ammonium persulfate and 2 to 6 parts of polyurethane. The flame-retarding and wear-resisting fabric disclosed by the invention is simple and reasonable in structure and easy to realize; the flame-retarding layer has flame-retarding, heat-insulation, heat-preservation and high-temperature resisting properties; the wear-resisting layer has a wear-resisting property and is durable; the flame-retarding and wear-resisting fabric has a good washing-resisting property, is safe and reliable to human bodies and has the advantages of softness and breathability, strong moisture permeability, no stuffy feeling and comfort for wearing. The composite fabric disclosed by the invention can be used for special protective clothing and special-purpose clothing or decorative fabrics to meet the requirements on the safety of the fabrics.

The invention discloses a manufacturing process of a new energy battery box based on an extruded profile. The manufacturing process comprises the steps of extrusion forming, profile sawing, bottom plate welding, overall bottom plate machining and runner milling, runner cleaning, plug block welding, frame assembly and accessory machining, frame, accessory and bottom plate welding, air tightness testing and cleaning, pressure drop testing, final inspection and the like. The liquid cooling system has the remarkable effects that the overall strength and rigidity of the bottom plate of the box body can be ensured under the condition that the liquid cooling performance is met, and the obtained liquid cooling system of the battery box body is good in reliability, bearing capacity, surface flatness and heat exchange effect.

The invention relates to a fixing support for a double-output-shaft external rotor electric motor. The fixing support for the double-output-shaft external rotor electric motor comprises a shaft sleeve and multiple supporting rods, wherein the multiple supporting rods are connected to the shaft sleeve, each supporting rod is provided with a connecting head, a shaft sleeve matching portion and a connecting tail, during connection, the shaft sleeve matching portions are attached to the peripheral surface of the shaft sleeve and are fixedly connected to the peripheral surface of the shaft sleeve, and for every two adjacent supporting rods, the connecting head of one supporting rod is in lap joint with the connecting tail of the other supporting rod and is fixedly connected with the connecting tail of the other supporting rod. According to the fixing support for the double-output-shaft external rotor electric motor, due to the fact that the supporting rods are connected to the shaft sleeve, the defects that according to traditional fixing support obtained through welding, the size is large, the machining difficulty is high, and a larger number of waste materials and excess materials are generated are overcome; the supporting rods can be machined individually and are quite convenient to replace; the strength and rigidity of the whole support are guaranteed due to the mutual connection of the supporting rods, and the overall quality is better.