95results about How to "Achieve flat" patented technology

The invention discloses an SIP (Session Initiation Protocol)-based regional ground-to-air radio station voice networking system which comprises a plurality of ground-to-air radio stations and also comprises a tandem scheduling server, an SIP (Session Initiation Protocol) radio station voice communication terminal and a networking node network element device, wherein the networking node network element device is connected between the tandem scheduling server and the SIP (Session Initiation Protocol) radio station voice communication terminal and connected with the ground-to-air radio stations.The SIP (Session Initiation Protocol)-based regional ground-to-air radio station voice networking system can realizes integration with a ground-to-air data link system and can realize goal-oriented ground-to-air voice command which is compatible and coordinated with ground-to-air data link system; and a commander can synchronously obtain the voice command control capacity when seeing a target. Moreover, a communication link for directly implementing the voice command control on first-line task aircrafts is provided for a remote high-level command center within shorter setup time and in more flexible setup mode so that commands of chief executives can reach the first-line aircrafts immediately and the effect that a link can be uses as long as set up is achieved.

The invention discloses an NPMS 2000 highway engineering project managing system and method. The NPMS 2000 highway engineering project managing system mainly comprises a system server, a firewall and a terminal user. The NPMS 2000 highway engineering project managing method comprises the steps of project information and participation unit setting, contract section setting, grouping authority managing, user managing and daily business module managing work. According to the NPMS 2000 highway engineering project managing system and method, the information smoothness and resource sharing of all parties in construction are achieved, the engineering construction project integral managing level and the monitoring capability are improved, accurate and timely information necessary for analyzing and decision making is provided for a decision-making layer, data acquiring is direct and convenient, the effectiveness, authenticity and timeliness of management data are improved, the project managing transparency and data security are improved, communication cost is reduced, the project managing experience and the effective data accumulation are achieved, the extensive management mode of project construction is changed, and the purpose that benefits are produced through the advanced managing is actually achieved.

The invention relates to the technical field of computer architectures, in particular to a content-centric network bottom implementation method, a content-centric network and a communication method realized based on the content-centric network. The content-centric network bottom implementation method comprises the steps that network nodes are connected through a network card and a data path, and the IP address setting of the network card is closed; the operating mode of the network card is set to be a promiscuous mode; the length value of the maximum transmission unit of the network card is set so that an intact content data package can be accommodated; a bottom interface face, based on an original socket, of the network nodes is established; a physical interface of the network nodes and the bottom interface face are bound, and the network card and a specific transmitting interface are bound; content data are named and stored on a content originating node, and the content originating mode broadcasts the prefixes of the names of the content data through an external network card.

The invention relates to a low-crack sensitive pipe fitting steel plate used under a low temperature condition. The mechanical component (wt%) of the steel plate comprises 0.03-0.08 of C, 0.2-0.35 of Si, 0.9-1.6 of Mn, 0.02-0.04 of Al, 0.01-0.07 of Nb, 0.01-0.07 of V, 0.01-0.02 of Ti, less than or equal to 0.15% of Nb+V+Ti, less than or equal to 0.5 of Cr, less than or equal to 0.5 of Ni, less than or equal to 0.4 of Mo, less than or equal to 0.3 of Cu, less than or equal to 0.18 of Pcm and the balance Fe and inevitable impurities. The method sequentially comprises the steps of KR molten iron pretreatment, converter smelting, LF refining, RH vacuum degassing, 370-450 mm thickness continuous casting blank continuous casting, continuous casting blank capping slow cooling, continuous casting blank checking and cleaning, casting blank heating, high-pressure water descaling, rolling, cooling, straightening and offline tempering. The steel plate structure is controlled to be a single tempered bainite structure, the grain size is within the range of 3-6 microns, and the steel plate has very excellent low-temperature toughness and can meet the use requirements of X70 pipeline steel underthe low-temperature condition of -60 DEG C.

The invention discloses a data center network system and a signal transmission system. Each switch is provided with a hub device in communication connection with the switch itself, the hub devices and the switches form a star network topology structure, and in comparison with a mesh network topology structure, wiring among devices in the star network topology structure is less, the network wiring amount can be effectively reduced, and the workload of subsequent network maintenance is reduced; signals outputted by a source server pass through a source switch in communication connection with the source server, a hub device, and a target switch in communication connection with a target server sequentially and further reach the target server, all signals are forwarded through the hub devices, the signal forwarding levels are few, and thus, the network structure flattening of the data center network system is realized, energy consumption caused by a core layer device and a convergence layer device is reduced, and the system energy consumption and the device maintenance cost are effectively reduced.

A plate material is drawn into a rectangular plate shape and the peripheral edge of each corner is pressed. A yoke (1) is formed, and the yoke (1) has a tongue-like flange (1a) projecting outward from a position below an upper end surface by a predetermined dimension. A resin frame (2) is insert-molded so as to cover the flange (1a). A magnet (3) is joined to the inside of the yoke (1), and a magnetic circuit where a magnetic gap (5) is formed is produced. A diaphragm (6) to which a voice coil (7) is joined is joined to a frame (2). When a speaker is produced in this way, joining strength between the yoke (1) and the frame (2) is increased and the height of the speaker is reduced. Further, a gap is eliminated from each corner of the yoke (1), and the speaker is excellent both in quality and performance where there is no magnetic leakage.

The invention discloses a flattening conducting information system mesh patrol system and method. A patrol task management module, a patrol duty checking module, a patrol roll call module, a patrol studying and judging module and a patrol evaluation module are included. The patrol task management module is used for establishing a patrol task according to the occurring features of patrol zone stage illegal criminal cases. The patrol duty checking module is used for checking, supervising and urging the task executing situations of a patrol group. The patrol roll call module is used for checking, supervising and urging the task executing situations of patrol members. The patrol studying and judging module is used for overlapping recent case distribution diagrams and various case statistics situations on a patrol mesh. The patrol evaluation module is used for comprehensive evaluation on the task executing grades of patrol personnel. A brand-new conducting dispatching mode with information images, voice interaction, scientific instruction effective executing and timely feedback combined is established in an innovation mode, conversion from single-direction passive reaction type service to a double-direction active response mode is well promoted, the visualization and the flattening of a service conducting mode are achieved, and service efficacy is improved.

The invention relates to a surface insulation treating method adopting boric acid as a reactant to reduce sendust core loss and belongs to the technical field of magnetic material preparation. The method comprises the following steps that 1, sendust is placed into a boric acid water solution to carry out high-energy ball milling so that the surface of the sendust can be fully moistened by the boric acid water solution; 2, the moistened sendust is dried for 1 h in a vacuum drying box with the temperature of 120 DEG C to be dehydrated; 3, the dehydrated sendust is placed into a reaction furnace with the temperature of 900 DEG C for 10-minute heat preserving, and cooled along with the furnace, and a multiphase insulating coating layer containing Al2O3, SiO2 and the like is synthesized on the surface of the sendust through a one-step reaction; 4, deionized water is used for cleaning the sendust having subjected to the boric reaction, and drying is carried out after cleaning; 5, 1wt% of epoxy resin and 0.8wt% of magnesium stearate are added to enable the sendust to be pressed into a magnetic powder core in a cold mode under 2000 Mpa; 6, the sendust core is annealed for 1 h at the temperature of 660 DEG C. The method is simple in process and low in cost; the prepared product is high in magnetic conductivity, low in loss and wide in application range.

The invention discloses a public safety emergency intelligence block chain sharing model and method based on a side chain, and relates to the technical field of block chains, the public safety emergency intelligence block chain sharing model comprises a main chain and a side chain, the side chain is responsible for collecting emergency intelligence data and uploading the collected emergency intelligence data to the main chain, and the side chain is provided with an intelligent contract. Cross-chain sharing of data is realized through an intelligent contract, the main chain receives data uploaded by the side chain and realizes data sharing of the data among nodes of the main chain, and the main chain is responsible for verifying, auditing and authorizing identities of partial nodes in the side chain, and realizes daily maintenance of the main chain to guarantee stable operation of the main chain at the same time. According to the method, a hierarchical management form is adopted, a multi-level data storage mode is built inside according to regions and departments, the hierarchical management mode can improve the toughness of the emergency intelligence management system while reducing data redundancy, and cross-chain sharing of data on a side chain is realized through Ethereum and an intelligent contract.

The invention discloses a flattening conducting information system alarm-receiving auxiliary system and method. An alarm-receiving auxiliary unit comprises an alarm-receiving information recording module, a crime site map showing module and a crime site and periphery video monitoring information calling module. The alarm-receiving information recording module is used for recording alarming information. The crime site map showing module is used for showing a crime site on a map, and recorded detailed alarm-receiving information is checked by clicking. The crime site and periphery video monitoring information calling module is used for calling crime site and crime site periphery video monitoring information, and the case reporting content of an alarm giver is verified. During alarm receiving, alarm-receiving information is recorded comprehensively in a systematic mode, the police is helped to carry out alarm receiving, alarm handling and police dispatching, monitoring video of a crime site or a crime site periphery can be called timely, flattening management is achieved, step-by-step application is of no need, efficiency is high, the case reporting content of the alarm giver can be verified accurately and reliably, effective alarming is pushed, and invalid alarming is filtered.

The invention discloses a development area construction project management system and a development area construction project management method. The development area construction project management system mainly includes a single project management computer, a first-level construction safety platform, a second-level group and area business processing platform, a third-level leading and assistant decision-making platform and a program management commuter; the method includes the steps of: management of the single project, establishment of the first-level construction safety platform, establishment of the second-level group and area business processing platform, establishment of the third-level leading and assistant decision-making platform and management of program. According to the development area construction project management system and method, management difficulty is reduced, business collaboration of construction projects is reinforced, communication efficiency is promoted, seamless join of engineering management and daily office work is achieved, and whole management of the program of roads, bridges and other projects is achieved.

The invention relates to a water-lubrication oil-free medium pressure two-stage-compression single-screw-rod air compressor. The air compressor comprises an electric motor, a first-stage single-screw-rod compression main machine, a second-stage single-screw-rod compression main machine, an air filter, a first-stage water and gas separator, a second-stage water and gas separator, a first-stage gas cooler, a second-stage gas cooler and an electrical control box; the first-stage single-screw-rod compression main machine and the second-stage single-screw-rod compression main machine are in transmission connection with the electric motor, and the air filter is connected with a gas inlet of the first-stage single-screw-rod compression main body; and the first-stage gas cooler is connected with the first-stage water and gas separator, the second-stage gas cooler is connected with the second-stage water and gas separator, and the electrical control box is electrically connected with the electric motor. Compared with the prior art, the water-lubrication oil-free medium pressure two-stage-compression single-screw-rod air compressor has the beneficial effects that the whole structure is simple and compact, complex pipelines and valves do not need to be additionally arranged, water lubrication is adopted, resistance losses are small, running reliability is good, volume efficiency is high, oil is avoided, zero emissions are achieved, no environmental pollution exists, running is carried out at the normal temperature, and the air compressor is environment-friendly, energy-saving and low in maintaining cost and has the very good application prospect.

The invention discloses an engineering anti-seismic support used for solving the problem that an existing support is poor in anti-seismic performance. The support comprises an upper part, a middle part and a lower part. The middle part comprises a first sliding plate and a second sliding plate which are stacked from top to bottom, the first sliding plate is rotationally matched with the upper part, each edge of the lower surface of a wing part is provided with an elastic element, the first sliding plate is matched with the lower part through the second sliding plate, and a second arc-shaped toothed protrusion and a third arc-shaped toothed protrusion on the upper surface and the lower surface of the second sliding plate are perpendicular to each other. By means of the support, height is reduced by about 40% under the condition that bearing force and the anti-seismic performance are not changed, product flattening is achieved, and the support has more advantages in the bridge and building installation process.

The invention provides a data authorization method and system. According to the data authorization method and system, certificate passing information of multiple users and authorization conditions ofdifferent data owned by the multiple users are stored in a chain in advance based on a block chain technology; and data authority authentication is carried out on the data requester by utilizing the on-chain pass information and data authorization conditions of different data owners, so that a data authorization scheme based on the block chain pass system is realized. According to the invention, the blockchain pass system is designed; the consistency of data interaction authorities of various data owners (such as different operation entities to which different network applications belong) canbe opened based on the pass of the chain universally recognized consensus; generalization, standardization and flattening of data authorization mechanisms of different data owners are effectively achieved, so that flexibility and high efficiency of data authorization are improved, and safety sharing and value protection of data in a dynamic network space can be better supported.

The invention discloses an anti-interference three-layer flat shielding cable which comprises a base material, adhesive for connecting two separation materials, a conductor for transmitting electric signals, an inner insulating layer for isolating the conductor, a shielding layer for shielding radiated interference and an outer insulating layer arranged on the outermost layer in a wrapping mode. The conductor sequentially comprises a first conducting layer, a second conducting layer and a third conducting layer from top to bottom, wherein cross sections of the first conducting layer, the second conducting layer and the third conducting layer are in a sheet shape, the first conducting layer is connected with the shielding layer, and the third conducting layer is connected with the inner insulating layer. According to the anti-interference three-layer flat shielding cable, through equivalent capacitance formed among the three layers of the conductor, the anti-interference technical effect is achieved, through FPC imitation structural design, cable flattening is achieved in real sense, and meanwhile the outer insulating layer isolates an electric wire, so that people are prevented from being injured by electric shock, the shielding layer shields radiated interference, and tension resistance is achieved through a reinforcing component, so that the cable can be smaller in size, smaller in thickness and higher in anti-interference capacity and shielding capacity compared with an existing flat cable.

The invention discloses an ultra-thin aseismic pedestal. The ultra-thin aseismic pedestal is not larger than 15 cm in the height direction and comprises an upper part, a middle part and a lower part, wherein the upper part is used for being connected with a supported object and is elastomer; the middle part has the two-dimensional movement capacity on the horizontal plane and consumes horizontal vibration and impact force in the movement process; the middle part comprises a first sliding board, a second sliding board and a fixed board; the first sliding board and the second sliding board are in sliding fit; the second sliding board and the fixed board are in sliding fit; and the lower part (3) is used for being connected with a supporting beam or column and is elastomer. The product is flattened, by the adoption of the structure of the pedestal, under the condition that the bearing force and aseismic performance are not changed, the height is reduced by about 60%, flattening of the product is achieved, and more advantages are achieved in the bridge and building installation process. The height of the pedestal is reduced, so that stabilization of bridges and buildings is more facilitated.

The invention discloses a flattening conducting information system pre-plan management system and method. A pre-plan exercise module comprises a pre-plan selecting sub-module, an exercise mode selecting sub-module, a video pre-plan retrival sub-module, a pre-plan force checking sub-module, an instruction sending sub-module and a resource displaying sub-module. A pre-plan executing module comprises a pre-plan selecting sub-module, an exercise mode selecting sub-module and a video pre-plan retrival sub-module. An electronic sand table module is used for carrying out quick police strength deployment and resource calling for an emergency on an empty map, and a displayed pre-plan is subjected to emptying operation. A system management module is used for maintaining an icon unit. A series of rehearsing for large-scale security activities of public security, police strength deployment, resource presentation, auxiliary decisions and decision instruction presentation of the emergency are achieved, all levels of personnel achieve line deployment and pre-management of information of vehicle, personnel and the like according to the pre-plan management system, practical experience is increased, and preparation for the emergency is achieved in advance.

The invention discloses a preparation method of high-toughness non-magnetic Ti(C,N)-based metal ceramic. The preparation method includes the following steps that firstly, TiO2 powder, W powder and active carbon powder serve as raw materials for burdening, high-energy ball milling is adopted, and an intermediate reaction product is obtained; then the obtained intermediate reaction product, TiN powder, Ni powder, Mo powder, Ti2AlN powder and AlN powder serve as raw materials for preparation of a mixture, wherein the mixture is prepared from components by mass parts: 24.0-30.3 parts of Ti, 11.5-16.1 parts of O, 14.0-19.3 parts of C, 1.9-2.3 parts of N, 18-32 parts of Ni, 10.0-11.1 parts of Mo, 4.0-4.5 parts of W and 0.4-0.6 part of Al; and adding of a forming agent, press-forming, removing ofthe forming agent and sintering are carried out, and the high-toughness non-magnetic Ti(C,N)-based metal ceramic is obtained. The sintered metal ceramic is not magnetic at room temperature and has high toughness and excellent comprehensive performance, there is no special requirement on production equipment, the energy consumption is reduced, and industrial application and popularization are facilitated.

The invention discloses a flattening conducting information system ring layer sealing control system. A ring layer sealing control unit comprises a ring layer pre-plan management module, a ring layer sealing control management module, a card point management module and a sealing control recording module. The ring layer pre-plan management module comprises a pre-plan newly-established sub-module, a pre-plan editing sub-module and a pre-plan executing sub-module. The ring layer sealing control management module comprises a ring layer sealing control starting sub-module, a one-key sealing control sub-module, an auxiliary sealing control sub-module and a sealing control process monitoring sub-module. The card point management module is used for a managing person to carry out card point establishing, and card point information filling is carried out. According to the features of cities or regions, a city or region ring layer prevention and control model and a prevention and control pre-plan are established, ring layer sealing control manoeuvre is organized, city or region ring layer prevention and control capacity is improved, after combination with a short message platform and a police order system, one-key sealing control is used for issuing instructions and messages to card point combat units, net casting working of a three-dimensional sealing control ring is carried out, and the movable track of a criminal suspect can be firmly fixed in a sealing control ring.

A substrate processing apparatus has a labyrinth around a processing liquid nozzle above a nozzle gap, and a seal gas is supplied to the labyrinth to seal the nozzle gap from an external space. Consequently, the entry of the atmosphere of the external space into a processing space through the nozzle gap can be suppressed. An opposing-member flange part of a top plate has a first uneven part on the upper surface, and a holder body of an opposing-member moving mechanism has a second uneven part on the lower surface. The labyrinth is formed by raised portions of one of the first and second uneven parts being disposed within recessed portions of the other of the first and second uneven parts with a gap therebetween only when the top plate is located at a second position (i.e., the processing space is created). This achieves flattening of the substrate processing apparatus.

The embodiment of the invention provides a bearing side network system, a mobile-fixed coexistence fusion system and a deployment method thereof. The bearing side network system comprises a mobile-fixed bearing IP metropolitan area network for realizing unified bearing of mobile communication and fixed communication, and mobile communication core network user plane equipment sinking to a convergence layer of the metropolitan area network, wherein the mobile communication core network user plane equipment is in communication connection with the mobile-fixed bearing IP metropolitan area network.

An armature of a DC motor with a brush comprises a rotary shaft born by a yoke housing, an armature core fitted on the rotary shaft from outside and secured to the same, and a commutator provided to the rotary shaft adjacently to the armature core and having individual segments arranged circumferentially. The armature core has nine teeth radially extending and nine slots formed between teeth and axially extending. The segment at the same potential are interconnected through short-circuit members. A pair of brushes in slide contact with the segments is arranged point-symmetrically with respect to the rotary shaft. According to the invention, the DC motor flattening can be implemented.

The invention discloses an ultra-thin AGV differential driving device, which comprises a base, a shaking base, a spring seat, a telescopic spring and a rotary disc shaft. A driving mechanism for driving the base to move is arranged on the base; the shaking base is rotationally connected with the base, and a containing groove is formed in the shaking base; one end of the spring seat is arranged inthe containing groove, and the spring seat is connected with the shaking base in a sliding mode; the telescopic spring is arranged on the spring seat, one end of the telescopic spring is connected with the spring seat, the other end of the telescopic spring is connected with the shaking base, and a rotating hole is formed in the spring seat; and one end of the rotary disc shaft is arranged in therotating hole, and the rotary disc shaft is rotatably connected with the spring seat. The invention provides the ultra-thin AGV differential driving device which can adapt to different grounds and hasa buffering effect. Flattening and miniaturization of the differential driving device in the vertical direction are achieved.

The invention discloses a compressor. The compressor comprises a shell, a fixed support, stators, rotors and a compression device. The fixed support is arranged inside the shell. The stators are arranged inside the shell and connected to the fixed support. The rotors are rotatably arranged outside the stators in a sleeving mode. A cavity is defined among the stators, the rotors and the fixed support. The compression device is arranged in the cavity and comprises a crankshaft, a main bearing, an air cylinder and an auxiliary bearing. One end of the crankshaft stretches out of the cavity, and the other end of the crankshaft is connected with the rotors. According to the compressor, the compression device is arranged on the inner sides of the stators, and the stators are sleeved with the rotors, so that the crankshaft of the compression device is greatly shortened, and therefore the rigidity of the crankshaft is improved, and the deflection of the crankshaft is lowered in the operating process of a motor. Hence, the gap uniformity between the stators and the rotors can be controlled conveniently during assembly of the compressor; the mechanical loss of the motor is reduced, the vibration and noise of the compressor are lowered, and thus the overall efficiency of the compressor is improved. In addition, the compressor can be flattened.

The invention discloses a flattening conducting information system police order transmitting system and method. A police order newly-established module is used for achieving new establishing of various police orders. A police order group management module is used for achieving management of units which often send police orders of various mechanisms, and a plurality of units are established in one group. A police order checking and receiving module is used for achieving management on received police orders from various mechanisms. A police order sending module is used for achieving management on sent police orders, the signing and feedback progress is checked, feedback information is checked, and a feedback accessory is downloaded. A signing and feedback timeliness ratio statistics module is used for achieving timeliness situation statistics of signing and feedback police orders of various units. A police order log module is used for achieving police order system log information recording. Order transmission is well documented, timely signing and feedback of police orders can be effectively achieved, the reliability and the timeliness of police orders are guaranteed, and the statistics of police order signing timeliness and feedback timeliness provides a data foundation for user management evaluation.

The invention relates to a multimode base station system based on a flat network structure. The multimode base station system based on the flat network structure which comprises a user terminal, a base station layer network element and a plurality of core network element devices, wherein the base station layer network element is connected with the user terminal through a wireless air interface, and the plurality of the core network element devices support different communication standards and are connected with the base station layer network element. The base station layer network element comprises at least two multimode base stations which are mutually connected, and the multimode base stations are all connected with the core network element devices of the different communication devices. Compared with a traditional wireless network structure, the multimode base station system based on the flat network structure has only one network element layer, namely, the base station layer network element. The multimode base stations of the base station layer network element are connected with the core network element devices (MSC / SGSN), the multimode base stations are mutually connected, and the multimode base stations can achieve partial information interaction through the mutual connection of the multimode base stations.

The invention provides a satellite-loaded packaged prestressed thin-walled tapered gravity gradient bar. The satellite-loaded packaged prestressed thin-walled tapered gravity gradient bar is characterized by being applied to the field of spacecrafts and comprising a satellite, a thin-walled bar, a load, and a small end frame. The small end frame comprises a baffle I, a baffle II and a rotary shaft. The whole thin-walled bar is tapered, the large-diameter end of the thin-walled bar is a big end, and the other small-diameter end of the thin-walled bar is a small end. The load is mounted on the small end frame. The big end of the thin-walled bar is fixed to the side face of the satellite through a flange, and the small end of the thin-walled bar penetrates through a speed-limiting narrow outlet and is fixed to the load. The satellite-loaded packaged prestressed thin-walled tapered gravity gradient bar has the undoubted beneficial effects that the structure is simple, and excessive kinematic pairs are avoided; and by fixing the big end of the thin-walled bar to the satellite, the gravity gradient bar can be kept relatively stable and effectively resist the resistance from outside. The gravity gradient bar can complete self-unfolding without additionally arranging a driving device after arriving at the outer space. The thin-walled bar can be flat, and accordingly a high extension ratio is achieved.

The invention provides a mud removing feeding machine, and belongs to the technical field of mining machines. The mud removing feeding machine comprises a vibration box, and an excitation device for driving the vibration box to vibrate. The upper end face of the vibration box is a feeding conveying face, and the feeding conveying face comprises multiple conveying faces, and the multiple conveyingfaces are in continuous butt joint along the mineral aggregate advancing path and are arranged sequentially from high to low in a ladder shape. Each conveying face is composed of multiple screen bars,and has screening clearances, and the length direction of the screen bars is consistent with the advancing direction of mineral aggregate. The widths of the screen bars are gradually reduced in the mineral aggregate advancing direction, and the screening clearances formed by the screen bars of the same conveying face are gradually enlarged in the mineral aggregate advancing direction. According to the mud removing feeding machine, the feeding conveying face is arranged in the ladder shape, the screen bars of special structures are adopted, blocking happening in the feeding process can be reduced, and a very good mud removing and screening effect is achieved.

The invention discloses a lifting vehicle for mold carrying. The lifting vehicle comprises a baseboard, lifting vehicle wheels are arranged at the four corners of the bottom face of the baseboard, andcomprise stretching vehicle wheels and retracting vehicle wheels, the stretching vehicle wheels comprise locating bases fixed to the bottom face of the baseboard, and stretching shelves and stretching wheels inserted to the side walls of the locating bases, vertical racks are formed on the locating bases, gears are meshed with the racks and are fixedly inserted to rotary shafts, one end of each rotary shaft is hinged to the corresponding stretching shelf, the other end of each rotary shaft penetrates through the corresponding stretching shelf to be connected with an output shaft of a drivingmotor, the driving motor is movably arranged on a middle base through the first rack, the first rack is meshed with the second rack through a middle gear, a supporting shaft is fixed to the second rack, the retracting vehicle wheels comprise guiding bases fixed to the bottom face of the baseboard, and retracting shelves and retracting wheels inserted to the side walls of the guiding bases, and thesupporting shaft is fixedly connected with the retracting shelves. The vehicle wheels are liftable, and thus the baseboard of a carrying vehicle is conveniently inclined to load molds, and is conveniently flat placed to conduct carrying.