89results about How to "Realize the limit effect" patented technology

The invention discloses a part welding device for new energy automobile machining, and belongs to the field of automobile part machining, the part welding device comprises a workbench and further comprises a supporting plate, the supporting plate is fixed to one side of the top face of the workbench, a mechanical arm is fixedly installed on the top face of the supporting plate, and a laser welding head is fixedly installed at the end of the mechanical arm; according to the pipeline machining device, the multiple H-shaped fixing rods, the containing base, the laser welding head, the rotating shaft and other structures are arranged, the effect of circularly machining a pipeline is achieved, the machining efficiency of the pipeline is improved, the effect of limiting the pipeline placed in the containing base is achieved through the arrangement of an anti-falling mechanism, the stability of the pipeline rotating along with the rotating shaft and machining is kept, and the machining efficiency of the pipeline is improved. And the overturning assembly facilitates installation of the pipeline, the operation convenience of workers is improved, the function that the pipeline is overturned in the containing base is achieved through cooperation of the rotating mechanism and the anti-falling mechanism, and after the upper surface of the pipeline is welded, the unwelded part can be welded.

The invention discloses a positioning mechanism for a numerical control double-column vertical turning and milling composite lathe, and relates to the technical field of lathe positioning. The positioning mechanism for the numerical control double-column vertical turning and milling composite lathe comprises a mounting cover arranged at the top of a bottom plate, a fixing disc is fixedly inserted into the top of the mounting cover, multiple sets of positioning assemblies arranged in an array mode are arranged at the top of the fixing disc, and each set of positioning assembly comprises two symmetrically-arranged sliding grooves; and L-shaped sliding blocks are connected into the sliding grooves in a sliding mode, reset mechanisms are arranged between the sliding blocks and the sliding grooves, the side walls of the sliding blocks are connected with clamping jaws through telescopic mechanisms, the clamping jaws slide in the sliding grooves, and the sliding blocks are pushed to move through a pushing mechanism. According to the positioning mechanism for the numerical control double-column vertical turning and milling composite lathe, a plurality of groups of positioning assemblies are conveniently selected in sequence according to use requirements to center and position a workpiece, meanwhile, each clamping jaw is conveniently adjusted and controlled to keep the same clamping force, and the positioning efficiency and quality are guaranteed.

The utility model provides a bamboo board moisture balancing device, and relates to the technical field of moisture balancing devices. The bamboo board moisture balancing device comprises a frame body, a humidifier is arranged on one side of the frame body, a water tank is arranged on the other side of the frame body, a plurality of spraying holes are formed in the middle of the frame body, a supporting frame is fixed to the middle of the frame body, a stepping motor is fixed to the middle of the supporting frame, and a driving frame is fixed to the driving end of the stepping motor. A sliding frame is slidably connected to the outer surface of the driving frame, a groove is formed in the middle of the sliding frame, a rack frame is fixed to one end of the sliding frame, and a plurality of fixing rods are rotatably connected to the middle of the frame body. According to the bamboo board moisture balancing device, the stepping motor drives the driving frame to rotate, the effect of turning over a bamboo board is achieved, the effect of improving the using effect of the moisture balancing device is achieved, the handle is pulled manually to rotate, the effect of limiting the bamboo board is achieved, and the effect of improving the using stability of the moisture balancing device is achieved.

The utility model provides a glutinous rice flour sample drying device which comprises a drying box with an opening in one side, a vertical partition plate dividing an inner cavity of the drying box into a drying cavity and an installation cavity is installed in the drying box, an installation block is installed on the inner top wall of the drying cavity, an installation groove is formed in the bottom of the installation block, and an electric heating plate is installed on the inner top wall of the installation groove. A containing box is arranged below the mounting block and connected with a lifting assembly used for driving the containing box to move up and down, and when the containing box moves up to the limit position, a containing groove in the top of the containing box and the mounting groove are attached to each other and define a closed drying space. When being used for drying the glutinous rice flour, the glutinous rice flour can be overturned and stirred synchronously, so that the drying efficiency of the glutinous rice flour is improved, the uniformity of the dried glutinous rice flour is guaranteed, and the defects of the existing tray type drying equipment are avoided.

The utility model relates to sheet metal processing technical field, concretely is a sheet metal part flatting machine for sheet metal processing, include: organism, including the object table, the surface mounting of object table has the side plate, the surface fixed coupling of side plate has the guide rod, the surface fixed coupling of guide rod has the fixed plate, the surface mounting of guide rod has the pressure plate, the surface of fixed plate has the screw rod through the screw connection, the utility model discloses the object table and the side plate are split and are connected under the action of connecting groove and connecting rod, can make the object table can remove from the inside of flatting machine, further make sheet metal part when carrying out flatting and placing can be more convenient and accurate, to avoid the direct placement sheet metal part in flatting machine leads to the situation that the staff vision is blocked by the pressure plate, simultaneously under the action of the support force that the support spring applies, can realize the clamping of the clamping block and two groups of clamping slots, further realize the limiting effect of object table movement before and after.

The application relates to a limiting device in the climbing process of a bridge high-pier climbing frame; the limiting device comprises a plurality of bearers, the bearers are rotationally connected on a middle platform of the climbing frame respectively, each bearer is perpendicular to the facade of the bridge high-pier, at least one roller is arranged on the side of the bearer close to the bridge high-pier, the roller is preferably a universal roller, the bearer is rotationally connected with the middle platform through a turnover mechanism, the bearer is fixedly connected with the turnover mechanism, the angle change between the bearer and the middle platform is realized through the movement of the turnover mechanism, and the bearers are arranged on the four edges of the middle platform; the application realizes the limiting effect of the climbing frame in the X and Y directions in the horizontal direction, strengthens the limiting function of the climbing frame, and guarantees the construction safety and construction quality.

The utility model relates to the technical field of fixing devices, in particular to an adjustable facility agriculture windproof net fixing device which comprises a device body, the device body comprises a mounting frame, and a clamping plate is arranged on one side of the mounting frame; an adjusting mechanism is arranged on the back of the clamping plate and comprises a supporting plate, and a fixing screw is inserted into the supporting plate. After the guide rod is rotationally connected into the threaded hole formed in the supporting frame, the sliding block is pressed to enable the supporting spring to contract, so that one end of the guide rod is inserted into the movable groove formed in the supporting plate, then the sliding block is released, and then the nut is rotationally connected to the outer surface of one end of the fixing screw rod; the supporting plate is clamped and fixed through cooperation of the nuts and the mounting frame, so that the effect of adjusting the distance between the mounting frame and the clamping plate is achieved, and the problem that if the windproof net is too thin, the fixing device cannot stably clamp and fix the windproof net is solved.

The application discloses a steam turbine pipeline throttling device and relates to the technical field of throttling devices.The steam turbine pipeline throttling device comprises an adjusting unit, a connecting unit and the like.The adjusting unit comprises a connecting shell, an adjusting assembly arranged in the connecting shell, a limiting assembly arranged on one side of the adjusting assembly and a sealing ring arranged on one side of the limiting assembly.The connecting unit comprises an electromagnetic valve pipeline arranged on one side of the connecting shell and an oil motor pipeline arranged on one side of the connecting shell.The steam turbine pipeline throttling device has the beneficial effects that the throttling orifice plate in the electromagnetic valve is cancelled, a new throttling device is installed in the pipeline, the throttling device can automatically adjust according to the medium pressure in the pipeline, meanwhile, the throttling orifice diameter can be changed, different impurities can smoothly pass through the throttling device and the throttling device cannot be blocked.

The utility model relates to the technical field of heat dissipation supports, in particular to a heat dissipation support for a notebook computer. According to the technical scheme, the device comprises supporting plates and a supporting rod, the number of the supporting plates is two, the two ends of one side of each supporting plate are connected through a connecting plate, a supporting block is fixed to the upper side of one end of each supporting plate, and a limiting block is fixed to the inner side of the lower end face of each supporting plate; a first connecting block is fixed to the outer portion of the lower side of the end, away from the supporting plate, of the supporting plate, the two ends of the supporting rod are fixed to the middle of a second connecting block, the two ends of the supporting rod are movably installed in the middle of the first connecting block, and the supporting rod is in a concave shape and located on the lower side of the supporting plate; the middle of the supporting rod is sleeved with a rubber sleeve, and the supporting block and the supporting plate are in a right-angle shape. The notebook computer support has the advantages that the notebook computer can be supported and cooled, and meanwhile, the angle of the notebook computer can be conveniently adjusted.

The utility model discloses a paper roll supporting frame for paper towel processing, and relates to the field of paper roll supporting frames for paper towel processing, the paper roll supporting frame for paper towel processing comprises a base plate, a limiting assembly, rotating shafts, a paper roll, a fixing box and a tensioning assembly, and a transmission shaft is rotated through other tools, so that the transmission shaft drives the two rotating shafts to rotate through cooperation of a first worm and a first worm gear; a speed reduction motor drives two second worms to rotate through a rotating rod, so that two rotating plates are driven to synchronously rotate towards the inner side, the rotating plates drive abutting plates to move inwards, the abutting plates abut against the side face of a paper roll, the limiting effect is achieved, the paper roll is prevented from deviating in the long-time rotating process, and use is convenient; and two threaded rods are driven to rotate synchronously through cooperation of a second worm and a second worm wheel, so that a threaded sleeve drives a lifting plate to ascend and descend, the lifting plate drives an arc-shaped plate to ascend and descend through a spring and a fixing block, the arc-shaped plate drives paper to be tightened, and then the paper is tensioned.

The utility model discloses a tubular pile transfer trolley, and relates to the technical field of tubular pile production, the tubular pile transfer trolley comprises a supporting table used for placing tubular piles, the top of the supporting table is provided with a placing groove, and the two sides of a groove cavity of the placing groove are arranged in a penetrating mode. And a connecting rod is fixedly connected to the outer surface of the supporting table, a fixing ring is fixedly connected to the connecting rod, a movable baffle is arranged on the fixing ring, and the baffle is used for limiting the pipe pile. When the pipe pile is transported, the end of the pipe pile is shielded through the baffle, the effect of restraining the pipe pile is achieved, in this way, when two transport vehicles work cooperatively, the pipe pile can be prevented from sliding, and therefore the effect of protecting the pipe pile is achieved.

The utility model belongs to acupoint point stimulation technical field, and disclose a kind of acupuncture acupoint point stimulation pen, including shell, the inside movable joint of shell is connected with push rod, the bottom fixed connection of push rod has elastic member, the middle part of shell inner wall is equipped with first cylindrical groove, acupuncture needle is placed in the inside of first cylindrical groove, the inside movable joint of push rod has cylinder;With the cooperation between the structure such as shell, push rod, first cylindrical groove and square block etc., to improve the stability when inserting needle, the first cylindrical groove and second cylindrical groove are respectively equipped with in the inner wall of shell and push rod, to realize the limiting effect of acupuncture needle, then, square block moves to the top of acupuncture needle under the action of external force, to shield acupuncture needle, and then make push rod descend and press acupuncture needle together by square block, to realize fast insertion needle, and the needle body part of acupuncture needle is also not easy to bend, to improve the stability of insertion needle.

This utility model belongs to the field of municipal engineering technology, specifically a prefabricated manhole for road storm and sewage inspection wells. It includes multiple prefabricated manhole bodies arranged vertically. The inner walls of the lowest prefabricated manhole body have connection ports on both sides, and a manhole cover is installed on the top of the inner wall of the uppermost prefabricated manhole body. The manhole cover has openings at both ends on one side of its interior, and springs are placed inside each opening. One end of each spring is tightly fitted with a limiting rod, and one end of each limiting rod is semi-circular. By placing a compression rod inside the mounting grooves on both sides of one of the prefabricated manhole bodies, the limiting rod between the prefabricated manhole body and the manhole cover is compressed and moves backward. When the limiting rod moves backward, it is positioned between the manhole cover and the prefabricated manhole body, thus limiting the position of the manhole cover.

The utility model relates to tool box technical field, concretely is a kind of measurement detection tool box, comprising: device ontology, the device ontology includes box, the box top end is connected with lid;The surface of the box one side is provided with adjusting mechanism, and the adjusting mechanism includes magnetite, and the surface of the magnetite is adsorbed and is connected with magnetic block.The utility model is moved and is positioned to sealing plate by sliding rod cooperation support frame, when the through slot opened to the box is opened, the position of sealing plate is moved, makes the sliding rod inside the sliding slot opened by support frame sliding, separates between magnetite and magnetic block, and then the angle of sealing plate is adjusted, makes fixed plate to rotate with hinged rod as pivot, to open the through slot opened to the box, the small instrument placed in the box is conveniently taken effect, avoid smaller instrument to be unable to conveniently take, lead to the problem of influence use convenience.

The utility model relates to the technical field of tray, concretely is a kind of stainless steel material car tray for squid processing, it includes: device body, the device body includes bracket, the bracket top is provided with disc body;The bracket top inside rotation is connected with assembly structure, the assembly structure includes adjusting screw rod, the adjusting screw rod top is connected with control ring.The utility model is inserted in the installation sleeve inside by guiding rod, then the angle of rotating control ring is changed, the adjusting screw rod connected with the bottom end of control ring is rotated in the thread groove opened in bracket, so that the limiting plate connected with the side of guiding rod is moved to the limiting slot opened in installation sleeve, limiting between installation sleeve and bracket is carried out using limiting plate, and adjusting screw rod is positioned using thread, so that the quick assembly effect between bracket and disc body is realized, avoid moving disc body displacement, cause the material in disc body to separate from the inside problem.

The utility model provides a cooking device. The cooking device comprises a supporting outer box, a meal box, a fuel support and a fuel block. A limiting through hole is formed in the top surface of the supporting outer box; air holes are formed in the side wall of the supporting outer box; the lunch box comprises a lunch box body and a lunch box cover, the lunch box body is of a hollow structure with an open top end and a sealed bottom end, and the lunch box cover is arranged at the open top end of the lunch box body; the meal box body comprises a first cylinder section, a gradually-expanded transition section and a second cylinder section which are sequentially connected from the bottom end to the top end, and the first cylinder section penetrates through the limiting through hole and is located in the inner cavity of the supporting outer box; the top end of the fuel support is an open end, the bottom end of the fuel support is a sealed end, the fuel support is of a gradually-shrinking structure from the open end to the sealed end, the sealed end is fixedly connected with the bottom face of the inner cavity of the supporting outer box, and the fuel support is used for containing the fuel block. According to the cooking device provided by the utility model, the meal box body can be heated by open fire, and a user can be prevented from being scalded when taking out the meal box.

The utility model discloses a gastroscope mouth biting device for the digestive system department, relates to the technical field of medical instruments, and aims to solve the problems that in the process of stretching a gastroscope tube into the mouth, a patient is inevitably subjected to nausea and vomiting due to stimulation, the tongue of the patient also acts due to nausea and vomiting, and then the gastroscope tube is pushed to shake; the tongue pressing device comprises an arc-shaped attaching plate of a U-shaped structure, a tongue pressing part used for limiting the tongue of a patient is detachably installed at the bottom of one side of the arc-shaped attaching plate, and the tongue pressing part comprises a connecting block with the two ends bent inwards to form bent structures; the bent end of the connecting block is provided with a fan-shaped tongue depressor used for abutting against the surface of the tongue of the patient and limiting the tongue. The tongue limiting device has the advantage that the tongue can be limited when a patient is stimulated in the process that the gastroscope tube extends into the tongue limiting device.

The present invention discloses a transmission line bird-proofing device that is easy to install, comprising a line tower, a mounting plate movably connected to the top of the line tower, a clamping plate movably connected to the top of the mounting plate, a bird-proofing device body fixedly connected to the top of the clamping plate, and a buckle mechanism fixedly connected to the inside of the mounting plate. The present invention solves the problem that the existing transmission line bird-proofing device needs to use specific installation tools during installation, and the installation tools are carried at high altitude for installation, which has certain safety hazards and is inconvenient for users to operate and install the bird-proofing device. It is suitable for transmission lines.

The present invention relates to the technical field of street light pole bases, and discloses a street light pole base that is convenient for maintaining street light poles, including a rotating connection mechanism and a telescopic closing mechanism. The street light pole base that is convenient for maintaining street light poles can change the angle at the connection part of the street light pole when maintaining the street light pole, so that the street light pole presents a horizontal state that is easy to maintain, thereby reducing the difficulty of maintaining the street light pole. At the same time, the device does not affect the connection space of the wires from below, so it does not cause the occurrence of structural limitation. In addition, the device can perform necessary sealing treatment on the detachable area after installation, so that a partition phenomenon is generated between the device and the external space, reducing the negative impact of humid gas on the electronic components inside the street light.

The utility model relates to the technical field of sports equipment, and discloses a rhythm platform with a leaning auxiliary mechanism, which comprises a base, a vibration platform and a mounting shell, the vibration platform is arranged at the top position of the base, the mounting shell is arranged above the vibration platform, a rectangular opening is arranged on one side of the mounting shell, and a leaning auxiliary mechanism is arranged on the mounting shell. A sliding plate is slidably connected to the inner wall of the rectangular opening, a backrest is fixedly connected to the end of the sliding plate, and the backrest is located over the vibration platform. The height of the backrest and the two armrests can be adjusted, users with different heights can conveniently stand on the vibration platform to move, the inclination angle of the guide rod is changed through the second connecting frame matched with the first connecting frame, the guide rod can drive the sliding plate to transversely move, and the user can conveniently sit on the vibration platform. The sliding plate drives the backrest to transversely move until the backrest is in contact with the back of people, so that people can lean the back on the backrest, and the chair is practical and suitable for wide popularization and use.

The utility model relates to detection device technical field, concretely is a kind of wheel hub bright surface size inspection device, it include: device ontology, the device ontology includes workbench, and the workbench top surface is provided with wheel hub frame;The wheel hub frame top two sides inside are inserted with limit structure, and the limit structure includes positioning frame, and the positioning frame back is connected with magnetic slide bar.The utility model places wheel hub in wheel hub frame inside, moves the position of magnetic slide bar, makes it drive positioning frame to slide inside the movable groove that wheel hub frame opens, utilizes the movement position of magnetic slide bar to limit positioning frame, to adjust the spacing of wheel hub frame and positioning frame, utilizes magnetic force to be adsorbed and connected between the both, to realize the limiting effect of magnetic slide bar, and utilize wheel hub frame cooperation positioning frame to clamp and fix wheel hub, avoid the problem that wheel hub moves simultaneously when wheel hub of different size in wheel hub frame moves.

This utility model relates to the technical field of injection solution production equipment, and discloses an oven for injection solution production, including a base and a gantry frame. The gantry frame is fixedly installed on the top of the base. Symmetrically arranged heating plates are installed on opposite sides of the gantry frame. A conveyor belt is installed on the top of the base, and several support seats are arranged on the conveyor belt. A placement seat is rotatably installed on the top of each support seat, and a placement groove is formed on the top of the placement seat. This utility model places the injection solution bottle in the placement groove, with the bottom of the injection solution bottle contacting a limiting block. A spring is provided, causing the injection solution bottle to compress the limiting block. The limiting block slides under pressure until the bottom of the injection solution bottle contacts the inner wall of the bottom of the placement groove. At this point, the limiting block contacts the outer wall of the injection solution bottle, achieving a limiting effect on the injection solution bottle. This invention can limit injection solution bottles of different diameters, further expanding its applicability.

The utility model belongs to the technical field of advertising boards, and particularly relates to an LED advertising board which comprises a protective shell, two lead screws are rotationally installed on the inner side wall of the protective shell, the outer side walls of the two lead screws are both in threaded connection with threaded sleeves, and the bottom faces of the threaded sleeves make contact with the inner bottom face of the protective shell. The base is fixedly installed on the top faces of the two threaded sleeves, a rotating shaft is rotatably installed on one side of the base, and an advertising board is fixedly installed on the outer side wall of the rotating shaft and movably connected into the base; the limiting assembly is located on the rotating shaft; the two second motors are both fixedly installed on the other side of the protective shell, the output ends of the two second motors are fixedly connected with one ends of the two lead screws correspondingly, and when an LED module in the advertising board is damaged, the second motors are started to drive the lead screws to rotate, the lead screws drive the threaded sleeves to move, the threaded sleeves drive the base to move, and the LED module in the advertising board is fixed to the base. And the advertising board is driven to move to the forefront position through the base.

The invention discloses a waterproof wall-passing device and a pipeline universal sealing structure thereof, and belongs to the technical field of engineering machinery cabs and sheds.The pipeline universal sealing structure comprises a fixing base, the fixing base is sleeved with an outer rotating sleeve, elastic protrusions are arranged on the outer wall of the fixing base, and linear clamping grooves are formed in the inner wall of the outer rotating sleeve in the circumferential direction; a film cylinder is arranged in the outer rotating sleeve and comprises a first fixing ring and a second fixing ring which are oppositely arranged, a film part is arranged between the first fixing ring and the second fixing ring, a through hole for a pipeline to penetrate through is formed in the middle of the film part, and the first fixing ring extends into the fixing base and is connected with the inner wall of the fixing base. The second fixing ring is connected with the inner wall of the end of the outer rotating sleeve, a stop ring is arranged on the outer wall of the inner end of the fixing base, and the fixing base is sleeved with a spring. According to the invention, the universality of pipelines with different diameters can be realized, the operation process is simple and convenient, the cost is low, and the sealing performance is good.

This utility model discloses a special ceramic metallization printing fixture, belonging to the field of special ceramic processing technology. The fixture includes a positioning frame and a mounting plate detachably installed within the positioning frame. It also includes: mounting holes arranged in a rectangular array on the mounting plate for placing ceramic substrates; each mounting hole has a clamping part for limiting the ceramic substrate's position. When the ceramic substrate is located within the mounting hole, its surface is flush with the mounting hole. Through the arrangement of the mounting plate and mounting holes, when the ceramic substrate is placed into the mounting hole, it directly contacts the anti-slip texture on the anti-slip pad, and the elasticity of the elastic sheet compresses the sidewall of the ceramic substrate, thereby limiting its position. This fixture can adapt to ceramic substrates of different sizes of the same type, effectively improving the adaptability of the mounting plate to the ceramic substrate and further improving production efficiency.

The utility model relates to the technical field of building structure supporting, in particular to a BIM (Building Information Modeling)-based supporting device for a building structure, which comprises a supporting mechanism, a clamping mechanism and a moving mechanism, a mounting box is reinforced and supported through a triangular reinforcing block arranged on the supporting mechanism, the transverse stability of the supporting mechanism in the use process is improved, and the stability of the supporting mechanism is improved. Inclination caused by overlarge load is avoided, and the construction effect is prevented from being affected. And the clamping frame is located at a proper spatial position by adjusting the elongation of the transverse telescopic rod. The cables are laid in the separation grooves by opening the side baffles of the clamping frame, then the limiting sliding rod on one side is inserted and fixed to the top end of the first clamping plate, and the second clamping plate is driven to move up and down by rotating an adjusting bolt arranged on the clamping mechanism, so that the fixing or limiting effect of the cables is achieved; the cable is prevented from being disordered in the pulling process, the using effect of the device is improved, and meanwhile operation convenience is provided for later maintenance personnel.

The utility model relates to the technical field of placing tools, in particular to a sample placing rack for food production, which comprises a placing rack body, a sample placing plate, a sample placing plate and a sample placing plate, adjusting mechanisms are inserted into the two sides of the supporting table and comprise sliding blocks, and one ends of the sliding blocks are connected with supporting plates. The threaded rod is rotated to be separated from the interior of the threaded groove formed in the supporting frame, then the threaded rod is moved to enable the sliding rod to slide in the through groove formed in the supporting frame, and the sliding block connected with one end of the supporting plate slides in the sliding groove formed in the supporting table. And after height adjustment is completed, the threaded rod is reversely rotated in another set of threaded grooves formed in the supporting frame, so that the supporting spring is compressed, the supporting plate is limited, the effect of adjusting the placement space of the supporting table is achieved, and the problems that the utilization rate of the internal space is low and the display effect is poor are solved.

The invention provides a convenient and fast lifting self-locking device which comprises an upper cover and a lower cover which are buckled with each other, and further comprises a sliding channel formed in the upper cover and the lower cover. The rope is arranged in the sliding channel in a sliding manner; the pressing block is arranged between the upper cover and the lower cover, a torsional spring enabling the pressing block to automatically reset after rotation is arranged in the pressing block, and the torsional spring is located between the lower cover and the pressing block; and when the rotating blocks are matched with the pressing blocks to rotate, the pressing blocks can press the rope on the inner side walls of the upper cover and the lower cover. The high-altitude rope locking device has the advantages that the rope can be locked and loosened at high altitude, and meanwhile the locking safety and practicability are improved.

The invention provides a desktop hinge structure and a folding desk, the desktop hinge structure comprises a hinge disc, the side wall of the hinge disc is fixedly provided with a hinge plate, and the side wall of the hinge disc is provided with a limiting groove; the hinging disc is hinged to the hinging piece through the first hinging shaft; a cross rod of the L-shaped swing plate is hinged to the hinge piece through a second hinge shaft, a magnet corresponding to the limiting groove is fixedly arranged on the hinge piece, a vertical rod of the L-shaped swing plate is located between the magnet and the limiting groove, a limiting boss corresponding to the limiting groove is fixedly arranged on the vertical rod, and the upper end face of the limiting boss is an inclined face. The limiting hinge structure has the beneficial effects that compared with a traditional plug-in type limiting hinge structure, when the hinge disc needs to be rotated, the hinge disc only needs to be rotated clockwise by a small angle, then anticlockwise large-angle rotation of the hinge disc can be completed, the limiting boss automatically resets to achieve the limiting effect when the hinge disc is unfolded, and operation is more convenient and faster.

The utility model relates to a steel bending machine for construction engineering, the steel bending machine for construction engineering is through being provided with transmission link and being connected with the bending bar in its end part, makes it in the process of using, one side can realize the effect that the steel is limited, the other side realizes the bending of two sizes of steel simultaneously through the bending bar, avoids the virtual position of one when the steel of two sizes is bent simultaneously between transmission link and support link, sets up the worm -like revolving stage that the inside diameter is increasing gradually from inside to outside in succession through the bending bar, and the middle part of revolving stage is equipped with the installation slot that facilitates pipe material placement. Make it in the process of using, can realize the effect that the end of the plate is bent in multi -angle, to this to guarantee its applicability in the process of using.