137results about How to "Does not affect assembly" patented technology

The invention provides a trimming die structure for a mobile phone casing. The structure comprises an upper die part and a lower die part, and is characterized in that: the upper die part comprises an upper splint, a slanted wedge and a stripper plate; and the lower die part comprises a product positioning die core, a male die cutter, a male die return spring, a male die return stop screw, a maledie cutter slide block, a female die cutter, a female die cutter slide block, a female die cutter slide block return spring and a lower die holder. By the trimming die structure for the mobile phone casing, the mobile phone casing is punched from inside to outside by a punching head, so that burrs are generated on the outer surface of the mobile phone casing, assembly of electronic parts of a mobile phone is not influenced, and the use effect of the mobile phone is ensured.

The invention discloses a system and a method for indirectly measuring stress distribution of assembly combined surfaces. The system comprises pressure sensing paper, strain gages, a pressure sensor, a display device, a scanner and a computer. The method includes firstly constructing the correspondence between the stress of the adjacent sides and the stress distribution of the combined surfaces, placing the pressure sensing paper between the combined surfaces of a part I and a part II for some time and taking the paper out, scanning the color distribution condition of the pressure sensing paper to be images inputted into the computer by the scanner, drawing a stress contour map of the combined surfaces by the computer, and affixing the strain gages on the extending lines of the stress contour on the adjacent sides; determining the stress distribution of the combined surface by measuring the stress of the stress gages. The method provided is a novel method for measuring the stress distribution of the assembly combined surfaces, and the method for measuring is low in cost in measurement of the stress distribution and is simple.

The invention relates to an alarming contact device of a moulded case circuit breaker. The alarming contact device consists of a base, a rear cover, a push rod, a microswitch and a microswitch toggle plate, wherein the base and rear cover are used for installing and fixing the push rod, microswitch and microswitch toggle plate in the base which is provided with positioning pins for positioning and installing the microswitch and push rod by molding; and based on the principle of lever, the push rod is pushed by enlarging the release force of a circuit breaker mechanism to push the push rod to pry the microswitch toggle plate by using a lower release force with no additional influence on the release force of the circuit breaker body. The alarming contact device has the advantages of adopting modular design, improving interchangeability and universality, along with simple and convenient installation, no influences on the assembly of other accessories after installation in the accessory camber of the circuit break due to the total thickness of 9.5mm only, simple assembly, convenient installation and uninstallation, stable performance and high reliability.

The invention discloses a lithium ion battery tab which comprises a switching positive tab and a switching negative tab which are arranged on a lithium ion battery. Tab glue is arranged on the switching positive tab and the switching negative tab, and a positioning device is arranged on the tab glue and used for positioning aluminum-plastic films in folding. The tab glue of the switching tabs is provided with two positioning projections or lugs which are positioned on two side surfaces of the switching tabs, the shell-entering position of a bare cell can be accurately positioned by the aid ofthe positioning projections or lugs on one surface of each switching tab, and alignment of the aluminum-plastic films after turnover can be accurately controlled by the aid of the positioning projections or lugs on the other surface of each switching tab. On one hand, poor exposure of packaged tab glue due to the inaccurate shell-entering position of the bare cell in packaging can be prevented, exposure consistency of the tab is improved, and assembly positioning accuracy of a battery pack assembled by the cell is improved. On the other hand, top edge sealing dislocation can be decreased and even eliminated, and cell length consistency is improved. The lithium ion battery tab is applied to the technical field of batteries.

The invention relates to an oil sprayer compress tightly screw cap. The oil sprayer compress tightly screw cap comprises an installing section and a screw thread section, the installing section is used for installing an oil sprayer couple part, a spring and a backing block, and the screw thread section is used for connecting the compress tightly screw cap and an oil sprayer body. The oil sprayer compress tightly screw cap is characterized in that a lengthening section is arranged, and the lengthening section is located above the screw thread section. The compress tightly screw cap is matched with a pressing plate or a compress tightly sleeve, so that an oil sprayer can be fixed on a cylinder cover, the interference of oil sprayer fixing structure with a valve spring and an air inlet and outlet rocker arm is eliminated, simultaneously the fuel gas in a cylinder can be effectively sealed, and assembly and disassembly are convenient.

An embedded metal material connecting method with a sealing effect comprises the following steps of forming a threaded hole in a metal piece such as aluminum, magnesium, copper, zinc, titanium, steel or other metals to be connected; screwing a screw into the threaded hole and tightening the screw; rotating and holding down the screw in the tightening direction by using needleless friction stir welding (a welding tool is only provided with a shaft shoulder without a stirring needle), fastening the screw through heat generated by violent friction and plastic deformation; and forming a welding layer which is several millimeters deep between the tail part of the screw and the metal piece to be connected. According to the connecting method, bonding strength is high and the joint is hidden without affecting assembling and beauty; and the sealing property is good so that gas and liquid can be effectively prevented from leakage.

The present invention discloses a process for electrophoretic painting of a fastener, which comprises the following; firstly, a step of phosphatization of zinc series, in which the phosphatization is carried out in a phosphatization tank at a temperature of between 30 and 40 DEG C for 3 to 5 minutes, and the sample piece is subjected to ceaseless shaking, washing, drying for 20 minutes at a temperature between 80 and 100 DEG C; secondly, a step of cathodic electrophoresis, in which the cathodic electrophoresis is carried out in an electrophoresis tank, the tank liquid temperature is between 28 and 32 DEG C, the electrophoresis time is between 2 and 3 minutes and the painting voltage is between 140 and 180 volt, and water washing is adopted; thirdly, a step of drying, in which the surface is dried for 40 minutes at a temperature of between 170 and 180 DEG C. The process solves the problem of processing main Cr6+ pollution in the most universal fastener surface treatment (zinc plating+passivation process, Dacro coating process, darkening process, and the like). The cathodic electrophoretic painting process adopted by the fastener is a novel technology, which improves the corrosion resistance of the fastener and has capacity of protecting environment as well. The composite cost of the process is lower than that of the barrel plating.

The invention discloses a vertical five-shaft linkage machine tool. The vertical five-shaft linkage machine tool comprises an overhanging-eave-type portal frame, a swing input motor (21), a swing speed reducer (22), a motorized spindle clamping head (9) and a motorized spindle (8), wherein the swing speed reducer (22) is arranged in a ram (7) and is in bolted connection with the ram (7), the swing input motor (21) is connected with the swing speed reducer (22) through a coupling, the swing speed reducer (22) is of a worm and gear structure, a worm-wheel shaft is a hollow output shaft (24), a worm is connected with the swing input motor (21) through a coupling, the rear end of the motorized spindle clamping head (9) is connected with the worm-wheel hollow output shaft (24) through an expansion sleeve (23), and the front end of the motorized spindle clamping head (9) is installed on the ram (7) through a bearing. The rigidity of the machine tool is improved by more than four times when compared with that of a traditional series machine tool, a connection gap between the swing input motor and the motorized spindle is avoided, swing precision is improved, rolled steel can be efficiently machined at the speed of 10000 turn / min, and the overall performance, including the rigidity, precision and machining speed, of the machine tool is substantially improved when compared with that of existing domestic and overseas machine tools.

The invention discloses hoisting equipment and a construction method which are suitable for synchronously hoisting prefabricated cantilevers on the two sides of a composite-section segmental beam. The hoisting equipment mainly comprises a gantry system, an anchoring system, a hoisting system and a walking system. The gantry system is fixed to a core longitudinal beam through the anchoring system, the prefabricated cantilevers are hoisted to the two sides of the core longitudinal beam through the hoisting system, after the installation of a pair of cantilevers is completed, anchoring between the hoisting equipment and the core longitudinal beam is relieved, and the hoisting equipment is moved forwards through the bridge deck walking system for hoisting of the next segment. The hoisting equipment can ensure sufficient on-beam beam transportation space, so that the hoisting equipment does not influence subsequent cross-core-longitudinal-beam transportation and assembly when a site lacks parking conditions for a large crane ship or a hoisting crane, the efficiency is improved, and the construction period is shortened.

The invention discloses a bending machine for steel pipes, which comprises a pressing plate, a hydraulic cylinder, a hydraulic driving device, a storage box, a motion frame, a turntable, a workbench, a support plate, a half-toothed gear, a base, a fixed plate, a limit pin, The second transmission shaft, the second motor, the first motor, the first transmission shaft, the motor mounting plate and the connecting rod are characterized in that, the upper surface of the base is fixedly connected with a motor mounting plate, and one side of the motor mounting plate A first electric motor is fixedly connected. This product can reduce the work intensity of the workers, improve the bending efficiency, and the bending degree is fixed, the bending quality is controllable, and will not affect the assembly of the subsequent process; this product has a storage box, which can facilitate the temporary storage of workers' items. The design is more user-friendly; the fixed height of the workbench of this product can be adjusted, allowing workers to bend steel pipes at a comfortable working height, thereby reducing the discomfort of workers and improving the bending efficiency of steel pipes.

The invention discloses a welding method for a cooling tank in a new energy electric vehicle. The cooling tank comprises a lower cover plate, an outer frame, an inlet side edge plate, an outlet side edge plate, an inlet tail end, an outlet tail end, a battery supporting cylinder, an upper cover plate and multiple supporting pillars. The welding method includes the following steps that the inlet side edge plate and the outlet side edge plate are symmetrically assembled on one outer side of the outer frame. The inlet tail end and the outlet tail end are assembled on the two opposite inner sides of the outer frame correspondingly, and the inlet tail end and the outlet tail end communicate with the inlet side edge plate and the outlet side edge plate correspondingly to form a water tank water guide system. The battery supporting cylinder and the supporting pillars are inserted in corresponding holes in the lower cover plate, after installation, the lower cover plate is then inserted in an insertion groove in the outer frame, and it is ensured that the installation gap between the lower cover plate and the outer frame is within 0.2 mm. The upper cover plate is installed, and meanwhile it is ensured that the installation gap between the upper cover plate and the outer frame is within 0.2 mm. The edge part of the cooling tank is welded through lasers, and the cooling tank is welded in a tin immersion manner. The welding method is suitable for sealing welding of related aluminum and aluminum alloys, and the welding technology is simple.

The invention discloses a tubular bus connection structure, which is used for realizing electrical conduction of incoming and outgoing lines of a switch cabinet after being inserted into a socket of the switch cabinet. The tubular bus connection structure comprises a conductor connector, a tubular bus, a silicone rubber insulation member, a fastener and a strain supporting member, wherein the conductor connector is fixedly connected to the top part of the tubular bus, and is used for being inserted into the socket of the switch cabinet so as to be electrically connected with conductors of the socket; the silicone rubber insulation member sleeves the outer surface of a part between the portion (positioned below the conductor connector) of the tubular bus and the portion (positioned inside the switch cabinet) of the tubular bus when the tubular bus is in operation, and is used for carrying out insulation and electrical isolation on the socket of the switch cabinet; the fastener is mounted under the silicone rubber insulation member, and is used for being fixedly connected with the switch cabinet when in operation; and the strain supporting member comprises a metal force bearing ring and a semiconductive silicone rubber ring covering the metal force bearing ring. The tubular bus connection structure meets the development requirements for the through-flow performance and miniaturization of the switch cabinet, and can upgrade the rated current without changing the existing switching equipment.

The invention provides a metal housing structure of a battery and an insulating treatment method for the metal housing structure. The insulating treatment method comprises the following steps: coating the edges and the welded parts of a metal housing of the battery with an ultraviolet (UV) adhesive or UV paint, and carrying out solidification treatment through a UV machine; and coating various surfaces of the metal housing of the battery with the UV adhesive or the UV paint, and carrying out solidification treatment through the UV machine. According to the metal housing structure of the battery and the insulating treatment method for the metal housing structure provided by the invention, the production efficiency of the battery can be greatly improved; and good insulating property of the metal housing of the battery can be ensured.

The invention provides a chassis and an air conditioner. The air conditioner comprises a rear casing assembly with an opening in the front end, a connecting part capable of being tightly connected with the bottom of the rear casing assembly is arranged at the rear part of the chassis, and reinforcing parts capable of being tightly connected with the front opening end of the rear casing assembly are arranged at the front part of the chassis. According to the chassis provided by the invention, the reinforcing parts are additionally arranged at the front part of the chassis, so that the integral strength of the chassis is enhanced; besides, the reinforcing parts can be tightly connected with the front opening end of the rear casing assembly, the connecting strength and the stability of the chassis and the rear casing assembly of the air conditioner are improved, and the stability of a machine body is enhanced accordingly; meanwhile, the reinforcing parts are arranged at the front parts of the chassis, thus, the rear casing assembly and the front part of the chassis are also tightly connected, a casing of the air conditioner and the whole chassis are connected more stably, and the stability of the machine body is further enhanced.

The invention discloses a low-temperature valve testing device which comprises a first sealing supporting plate, a second sealing supporting plate, a first connecting plate, a second connecting plate, an outlet stopping block component and an inlet stopping block component. When the testing device is used, the first connecting plate and the second connecting plate are mounted on the periphery of the outlet end of a low-temperature valve and the periphery of the inlet end of the low-temperature valve in a sleeved mode and are stopped and supported by the outlet stopping block component and the inlet stopping block component, the first connecting plate and the first sealing supporting plate are fixed through a fastener, and the second connecting plate and the second sealing supporting plate are fixed through a fastener. The testing device solves the problem that according to an existing testing device, leakage easily happens, the torque is reduced by shortening the length of a stud, the sealing performance of the low-temperature valve and the sealing supporting plates is good, and normal operation of a low-temperature valve test is guaranteed.

The invention discloses a device and method for leading out an optical fiber grating sensor from a composite axle tube. The device includes a first outer sleeve, a second outer sleeve and an inner sleeve; one end of the inner sleeve is sleeved with the inner side end of the first outer sleeve; the inner sleeve is fixedly connected with the first outer sleeve; the other end of the inner sleeve is sleeved with the inner side end of the second outer sleeve; the inner side end of the first outer sleeve is in contact spliced connection with the inner side end of the second outer sleeve; a through hole is formed at the spliced joint of the first outer sleeve and the second outer sleeve; the through hole passes through the sleeve wall of one side of the inner sleeve; an open groove along the length direction of the sleeve wall of the inner sleeve is formed in the sleeve wall of the inner sleeve; and one end of the open groove is communicated with the through hole, and other end of the open groove extends to an end surface of one side of the inner sleeve, the second sleeve being located at the one side of the inner sleeve. With the device and method adopted, the problem that an optical fiber can be only led out from end surfaces of the axle tube can be solved; and optical gratings are distributed in an all-round multi-point manner between the laid layers of prepregs, and therefore, damage to the optical fiber and the composite axle tube in the separation process of the optical fiber and composite axle tube can be avoided, and the performance and preparation quality of the composite axle tube can be improved.

The invention discloses a three-side-turning advertising board prism transmission assembly. The three-side-turning advertising board prism transmission assembly comprises a support base, an upper transmission central spindle, a lower transmission central spindle, a transmission wheel, a transmission shaft sleeve and a spring, wherein a containing cavity is arranged in the center of the support base; the upper transmission central spindle is arranged on the upper portion of the containing cavity; the lower transmission central spindle is arranged on the lower portion of the containing cavity; the transmission wheel is arranged below the support base and connected with the lower transmission central spindle; the transmission shaft sleeve is vertically arranged along the containing cavity; the upper end of the transmission shaft sleeve is in transmission connection with the upper transmission central spindle; the lower end of the transmission shaft sleeve is connected with the lower transmission central spindle; and the upper transmission central spindle and the lower transmission central spindle are spaced, and the spring is arranged in the space formed by the upper transmission central spindle and the lower transmission central spindle. The transmission shaft sleeve and the spring are additionally arranged, the upper transmission central spindle is downwards pressed, the springis made to be compressed, the upper transmission central spindle moves downwards by a certain distance after the spring is compressed, and thus field assembly and maintenance and replacement when a three-prism advertising board is damaged later are facilitated.

The invention discloses a batch drilling well wellhead design and assembling-disassembling method for a modular drilling machine. The wellhead design comprises the following design of supporting facilities: wellhead deck design, split bell mouth design, bell mouth fixing mode design, bell mouth fixed suspension design, grouting pipeline fixed design of bell mouths, reflux pipes and metering pumps, bell mouth variable diameter design, bell mouth variable diameter hoisting special tool design, telescopic inner and outer drum horn tube design, sealing design of special pressure plate sealing or gas inflatable pneumatic tires, lifting pipe hoisting special design, and special lifting pipe suspending channel design which are easy enough to operate. The batch drilling well wellhead design and matched wellhead assembling-disassembling method for the modular drilling machine provided by the invention can solve the problem of time consumption caused by frequently moving of a derrick in batch drilling operation of the modular drilling machine, reduce hoisting risks and risks of high falling objects caused by dissembling and throwing wellhead parts and optimize assembling and disassembling method of wellheads, and further are simple and convenient in design and simple in operation mode.

The invention discloses a heat pump water heater and a water amount monitoring device of the heat pump water heater. The device comprises a both-piezoelectric ceramic transducer, a signal processing chip and a master control chip. A first piezoelectric ceramic and a second piezoelectric ceramic included in the both-piezoelectric ceramic transducer are arranged on the two sides of a water outlet / inlet pipe respectively. The signal processing chip sends a triggering signal to one of the first piezoelectric ceramic and the second piezoelectric ceramic to trigger one piezoelectric ceramic to be started, and receives a feedback signal sent by the other piezoelectric ceramic, and a first time difference between the feedback signal and the triggering signal is obtained; a triggering signal is sent to the other piezoelectric ceramic to trigger the other piezoelectric ceramic to be started, a feedback signal sent by one piezoelectric ceramic is received, a second time difference between the feedback signal and the triggering signal is obtained, and the water flow in the water outlet / inlet pipe is calculated according to the first time difference and the second time difference. The master control chip calculates the water usage amount within a first preset time according to the water flow within the first preset time, and therefore the measuring accuracy can be improved, installing is convenient, and the assembling of the whole machine is not affected.

The invention discloses a backlight module. The backlight module comprises a back frame, a supporting wall, an optical assembly, a flexible circuit board and a light source, wherein the back frame comprises a bottom wall and a side wall which is in bent connection with the bottom wall, and the bottom wall and the side wall form a containing space; the supporting wall is hinged to the side wall, the supporting wall can be turned over at least in the direction close to the containing space to the first state of being parallel to the bottom wall and can be turned over at least in the direction away from the containing space to the second state of being parallel to the side wall; the optical assembly is arranged on the bottom wall and located inside the containing space; the flexible circuit board is arranged on the bottom wall and at least partially overlapped with the optical assembly; the light source is arranged on the face, away from the bottom wall, of the flexible circuit board, andthe light source is opposite to the side edge, facing the side wall, of the optical assembly. The invention further discloses an assembling method of the backlight module, a display assembly and an electronic device. In this way, on the condition that the width occupied by a non-display region of the backlight module can be lowered, the stability of a supporting display panel of the backlight module is ensured, and assembling of the backlight module is not affected.

The invention discloses an electrical conductivity module, which comprises a substrate, a first electrical conductivity circuit and a first superfine circuit. The line width of the first superfine circuit is less than that of the first electrical conductivity circuit. The first electrical conductivity circuit and the first superfine circuit are arranged on the same surface of the substrate and arranged with each other at intervals. The electrical conductivity module can shorten the development cycle of the superfine circuit. The invention further discloses a touch screen.

The invention discloses an ABS / ESC valve body machining method for an automobile braking system. The ABS / ESC valve body machining method is characterized by comprising the following steps that firstly, a valve body machined face and hole are selected as a machining rough positioning datum after oxidation, and the machining allowance is reserved; b, a rough positioning datum hole and a rough positioning datum face of a valve body and an energy accumulator hole in the valve body are machined; c, integral sulfuric acid hard oxidation is conducted on the valve body obtained after machining in thesecond step; and d, the rough positioning datum hole and the rough positioning datum face on the valve body serve as the datum, the rest of holes of the valve body obtained after oxidation in the third step are machined, and the rough positioning datum hole and the rough positioning datum face are machined to the size through datum conversion. According to the ABS / ESC valve body machining method,the anode oxidation surface area is small, only the surface of the energy accumulator hole of the valve body is provided with an oxidation film through machining finally, and the later procedure assembling and functions of the ABS / ESC valve body cannot be influenced.

The invention belongs to the technical field of textile equipment, and discloses an automatic coiling device for cloth for spinning. The automatic coiling device is characterized by comprising a cloth conveying mechanism arranged on a rack, a cutting mechanism is arranged above the cloth conveying mechanism, a coiling mechanism is arranged below the cloth conveying mechanism, the cloth conveying mechanism adopts a belt conveying structure and is used for turning the cloth by 180 degrees and conveying the cloth to the coiling mechanism through the cutting mechanism, the cutting mechanism is used for cutting the cloth meeting the coiling length requirement, and the coiling mechanism adopts a belt conveying structure, is used for coiling the cloth conveyed by the cloth conveying mechanism and adopts a connecting rod structure to automatically convey the coiled cloth to a transporting mechanism so as to complete coil unloading operation.

The invention discloses a turbine handpiece provided with a needle locker, which comprises a support, an ejector needle, a needle guard and a sleeve. Mutually adaptive through holes are formed in the radial direction in the tail end of the ejector needle and the sleeve; a fixing needle is inserted into the through holes for fixing the ejector needle and the sleeve, and comprises a fixing part and a limiting arc, the fixing part is a cylinder, the limiting arc is an arc connected with one end of the fixing part, and the arc is matched with the outer surface of the sleeve. According to the invention, the ejector needle and the sleeve are connected by utilizing the fixing needle, all that is needed for connection is to align the through hole in the ejector needle to the through hole in the sleeve, and then insert the fixing part of the fixing needle into the through holes, the installation is convenient and simple, and the fixation is relatively stable, so that conditions of misplacement and ejector needle deflection are avoided; the ejector needle comprises the limiting arc, the fixing part inserted into the through holes can sleeve the sleeve to prevent the fixing needle from falling off and causing a potential safety hazard; a needle groove matched with the limiting arc is arranged on the sleeve and can hide the limiting arc in the needle groove without influencing the assembly of other parts in the handpiece.

The invention provides a flexible high-strength connecting rib and an assembly method thereof. The flexible high-strength connecting rib comprises two anchoring ends, a sleeve and a wire rope; each anchoring end is provided with an anchor cap, a restraining sleeve and at least one wedge block, each restraining sleeve is provided with a reducing hole, the wedge blocks are located in the reducing holes and provided with through holes, and the anchor caps cover one ends of the restraining sleeves; the two ends of the wire ropes are inserted in the restraining sleeves of the two anchoring ends andpenetrate through the through holes, needle bodies are also hammered into the ends of the wire rope and are formed into external expansion ends, and the needle body ends press the anchor caps; the sleeve sleeves the wire rope and is located between the two anchoring ends. The flexible high-strength connecting rib and the assembly method thereof are suitable for fabricated structures, and can effectively avoid the problem of difficult splicing or difficult slip casting caused by deformation of steel bars.

The invention discloses a vehicle-mounted air inlet valve. The vehicle-mounted air inlet valve comprises an upper valve body and a lower valve body. The upper valve body is fixedly connected with thelower valve body. A valve cavity is cooperatively formed in the upper valve body and the lower valve body, an air inlet communicating with the valve cavity is formed in the upper valve body, an exhaust port communicating with the valve cavity is formed in the lower valve body, a valve element and a valve element spring are arranged in the valve cavity, one end of the valve element spring abuts against the lower valve body, and the other end of the valve element spring abuts against the valve element. The valve element abuts against the upper valve body under the effect of the valve element spring in order to block the portion between the air inlet and the valve cavity, multiple shunting blocks are arranged at the position, located on an air outlet, of the lower valve body, one ends of themultiple shunting blocks are evenly distributed along the circumference of the inner wall of the lower valve body, the other ends of the multiple shunting blocks are connected with the position of thecircle center of the inner wall of the lower valve body, and the shunting blocks and the lower valve body are of an integrally-formed structure. The upper valve body and the lower valve body are arranged, the effect of lowering noise can be achieved, and the shunting blocks and the lower valve body are of the integrally-formed structure, so that it is guaranteed that the shunting blocks are not separated from the lower valve body.

The invention discloses a wiring double-terminal automatic assembling machine and an assembling process thereof, and belongs to the technical field of terminal assembling equipment; the wiring double-terminal automatic assembling machine comprises a rack, wherein the rack is provided with an insulator feeding mechanism, a vibrating disk, a material belt conveying mechanism, a material folding mechanism, a material belt conveying mechanism, a material folding mechanism and a clamping mechanism; the material belt conveying mechanism comprises a first fixed seat fixed on the rack, a lower mounting plate transversely arranged on the first fixed seat, a placement groove transversely formed in the lower mounting plate, a first support which is fixed on the rack and is positioned on the rear sideof the first fixed seat, a first rotary motor arranged on the first support, and a rotary gear in transmission connection with the output shaft of the first rotary motor. According to the automatic assembling machine, a U-shaped rotating gear which can be clamped with a material belt is arranged in the material belt conveying mechanism to drive the material belt to move forwards slowly in a placing groove inner seat, so that the probability of breakage of the material belt is lowered.

The invention discloses a DNA fragment and an application thereof in construction of a recombinant influenza virus expressing a red fluorescent protein gene. An mCherry fluorescent gene is inserted behind an NS1 gene of an H9N2 influenza virus strain, wherein the complete NS gene is formed by sequentially linking an NS1 gene, the mCHerry fluorescent gene and an NEP gene; the gene and the NEP geneare connected by a PTV-1 2A sequence which can be recognized and cut by protease, so a fluorescent protein-labeled NS fusion gene is constructed and has the nucleotide shown in SEQ ID NO:1. The constructed recombinant influenza virus can produce live virus expressing red fluorescent proteins, is relatively stable in the process of virus passage, does not affect the function of the virus itself, has the growth curve and the titer similar to those of a wild virus strain, can be used for subsequent research, and is of great significance on development, screening and production of anti-influenza virus drugs.