721 results about "Elastic rods" patented technology

The invention relates to a three-dimensional continuous shape estimation method and system for a flexible robot, and the method comprises the steps: combining the arc length of the flexible robot and an unknown external load from the environment with a Cosserat elastic rod model and a Cosserat elastic string model, so as to generate a Lie algebraic coupling statics model representing tendon driving; the method comprises the following steps of: acquiring an external load, modeling the external load into Gaussian process noise to construct a prior probability model so as to obtain prior probability distribution of the flexible robot in the Lie algebraic space, and constructing a measurement noise model in the Lie algebraic space according to discrete measurement poses and measurement noise captured by a sensor so as to obtain a predicted measurement value. And fusing the prior probability distribution and the predicted measurement value to obtain posterior shape estimation of the flexible robot and the robot, and calculating continuous three-dimensional shape estimation of the flexible robot and first credibility of the continuous three-dimensional shape estimation according to the posterior shape estimation and a Gaussian process interpolation method. Therefore, accurate sensing of the continuous three-dimensional shape of the flexible robot is realized.

The invention relates to the technical field of protection devices, and particularly discloses an adjustable conveying belt protection device for furniture production, which comprises supporting legs, a cross rod is fixedly mounted at the upper ends of the supporting legs, a convex sliding rod is slidably mounted from the inside to the outer side of the cross rod, and a main connecting rod is fixedly mounted on the upper end surface of the convex sliding rod; an elastic rod in the protection assembly can buffer vibration during material conveying, a silica gel protection film layer on the outer side of a first protection arc-shaped plate makes direct contact with materials, and surface damage caused by rigid friction is avoided; an arc-shaped connecting plate is matched with an arc-shaped sliding groove, so that the protection assembly can adapt to slight deformation of the material, the protection effect on the damageable furniture plate is further improved, and the surface quality of a product is maintained; meanwhile, the telescopic protection wings are additionally arranged to fill gaps of the arc-shaped plates, the buffer extension sections can be adjusted to change the protection radius, the protection film can be spliced and extended to expand the coverage width, and the protection range is expanded from the three dimensions of gap filling, radius adjustment and width expansion.

The invention provides an underwater maintenance intelligent robot which is used for solving the problems that in the prior art, passive maintenance efficiency is low, cost is high, and safety risks exist. Comprising a frame main body, a cutting and recycling module and a washing module, the frame main body comprises a first main body, a second main body with the same structure as the first main body, and a self-adaptive connecting part for connecting the first main body with the second main body; the cutting and recycling module comprises a mounting seat fixedly connected with one side of the first main body, a sheath, a plurality of support arms, an elastic rod, a pulling power part used for pulling the sheath to bend and located in the circumferential direction of the anchor chain, a flexible chain holding part, a cutting part used for cutting a fishing net wound on the anchor chain, and a recycling part used for recycling and storing the fishing net cut by the cutting part; the washing module comprises a first washing part and a second washing part, and the first washing part and the second washing part are installed on the two sides of the second main body correspondingly and arranged in a staggered mode. The robot is high in operation efficiency, low in cost and capable of improving safety.

The invention belongs to the technical field of electric connectors, and discloses a quick-locking anti-loosening electric connector device, which comprises an electric connector shell and a plug piece, and is characterized in that a rotating plate slightly moves upwards under the elastic extrusion of a first extrusion spring, and a clamping plate is clamped at the inner wall of a clamping hole in the upward moving process of the rotating plate; therefore, the jack of the plug piece is inserted into the socket in the inner wall of the shell of the electric connector for quick locking, and the connector is effectively prevented from falling off accidentally under the action of vibration or external force. When a rotating plate slightly moves upwards, a rotating piece drives a sliding block in a locking assembly to reversely move in a sliding groove, the sliding block drives a first connecting plate and a connecting rod to move, the connecting rod drives a flexible elastic rod to move, and the flexible elastic rod can make contact with the side, entering a clamping hole, of the outer wall of a clamping plate in the moving process; due to the fact that the clamping grooves are formed in the outer wall of the clamping plate, the flexible elastic rods can make contact with the outer wall of the clamping plate for clamping, and the clamping plate is effectively prevented from loosening due to insufficient friction force or other reasons.

The inner wall polishing device for coupler machining comprises an operation table, a fixing base is arranged on the upper portion of the operation table, a first hydraulic cylinder is arranged on the upper portion of the fixing base, and a telescopic rod is arranged at the output end of the first hydraulic cylinder and extends to the lower portion of the fixing base. A driver is arranged on the lower portion of the telescopic rod, a polishing head is arranged at the power output end of the driver, the polishing head comprises a driving rod, and elastic rods are arranged on the periphery of the driving rod. A sliding rail is arranged on the surface of an operation table, a sliding seat is arranged on the surface of the sliding rail, a clamping mechanism is arranged on the upper portion of the sliding seat, the clamping mechanism comprises a fixing plate fixedly installed on the sliding seat, electric push rods are arranged on the two sides of the fixing plate, and chucks are arranged at the output ends of the electric push rods. The electric push rod drives the chuck to stretch out and draw back, so that the coupler is fixedly clamped, and the grinding head can penetrate through the coupler to grind the inner wall of the coupler in all directions.

The utility model relates to a handle rocker device and a game handle. The handle rocker device comprises a rod cap, a rod cover and an elastic rod set which are sequentially arranged in the axial direction. The elastic rod group comprises an outer rod which is fixed relative to the position of the rod cover, an inner rod which is movably matched with the outer rod, and an elastic element which abuts against the inner rod; the rod cap is provided with an abutting portion abutting against the inner rod, and the rod cap is detachably connected with the rod cover so that the rod cap can be selectively replaced, and the deformation amount of the elastic element can be adjusted through the abutting portion. The gamepad rocker device is provided with the rod cap detachably connected with the rod cover, the elastic acting force of the elastic rod set in the gamepad rocker device can be directly changed by replacing the rod cap, and therefore the damping hand feeling of the gamepad rocker device in the gamepad can be directly and rapidly adjusted, and the rod cap and the rod cover are of a fixed structure after being connected. In the high-frequency operation process, the damping hand feeling of the gamepad can be kept stable.

The present invention belongs to the technical field of plant pollination devices, and particularly relates to a handheld electric fruit tree pollinator and a pollination method. The handheld electric fruit tree pollinator includes: a depth camera (1), a lateral vibration motor (2), a lateral vibration motor cover (3), a solenoid valve (4), a solenoid valve cover (5), a sealing ring (6), a filter screen (7), a filter screen connecting piece (8), a fluff brush connecting piece (9), a fluff brush (10), a longitudinal vibration motor cover (11), a longitudinal vibration motor (12), a powder chamber cover (13), a powder chamber (14), an elastic rod (15), a screw (16), a multi-joint arm hand rod (17), and an intelligent controller (18); the present invention is convenient to carry and simple to operate; the solenoid valve is closed in the non-working state, reducing pollen waste; based on the pollination principle of insects (bees), the pollen is charged with static electricity through the fluff brush and high-frequency vibration, improving the pollination success rate and reducing the damage to the inflorescence.

The utility model relates to the technical field of glue binding machines, and discloses a gluing mechanism of a glue binding machine. According to the gluing mechanism of the gluing machine, an equipment clamping and fixing mechanism is installed on the left side of the upper portion of a gluing machine body, the equipment gluing mechanism is installed behind the gluing machine body, the equipment clamping and fixing mechanism comprises a clamping device installed on the left side of the upper portion of the gluing machine body, and clamping plates are arranged on the two sides of the middle of the clamping device. The clamping device is arranged on the left side of the upper portion of the cementing machine body, the clamping plate is arranged in the middle of the clamping device, the clamping plate is connected with the side plate and the drivers through the telescopic rod and the elastic rod, the drivers are located on the left side and the right side of the interior of the clamping device, and the clamping plate is clamped through the drivers; and the telescopic rods are arranged, so that one side of each book can be fixedly clamped, and the books are well bundled and installed and are not prone to loosening and falling off.

The invention discloses a method for picking and sorting quartz wafers in a wafer arrangement station, and relates to the technical field of quartz wafer production and processing equipment. A device used in the method comprises a picking driving assembly, a universal adjusting assembly and a multi-linkage picking machine head, the multi-linkage picking machine head comprises a disc-shaped machine shell, a plurality of picking mechanisms are evenly installed in the machine shell in the circumferential direction, and each picking mechanism can independently complete adsorption, maintaining and releasing actions on a quartz wafer. The picking mechanism comprises a negative-pressure adsorption assembly, a mechanical grabbing assembly and a synchronous starting structure, the negative-pressure adsorption assembly is composed of an air bag, a clamping part and an adsorption pipe, the mechanical grabbing assembly comprises an elastic grabbing claw composed of a plurality of elastic rods, and other quartz wafers around the target quartz wafer are pressed in the initial stage of picking for expanding so as to avoid mistaken adsorption; the target quartz wafer is grabbed during gathering in the later picking period, so that double picking guarantee is achieved; the elastic grabbing claw is provided with an elastic net, so that normal stress is effectively relieved, and quartz wafers are prevented from cracking.

The utility model relates to the technical field of quick-freezing devices, in particular to a tunnel-type quick-freezing device for quick-frozen food, which adopts a tunnel-type quick-freezing structure that a conveying belt is matched with a screen plate to realize reciprocating conveying of food, simplifies a conveying structure and reduces adhesion and damage of the food. Comprising a quick-freezing box, a driving roller, a driven roller, a conveying belt and a refrigerating system, the quick-freezing device further comprises a plurality of separating and pushing assemblies, a net plate and an ice receiving mechanism, the separating and pushing assemblies are evenly installed on the outer surface of the conveying belt, each separating and pushing assembly is composed of a plurality of evenly-arranged elastic rods, the separating and pushing assemblies are perpendicular to the conveying direction of the conveying belt, and the net plate is installed in a quick-freezing cavity of the quick-freezing box. The end of the screen extends out of the quick-freezing box through the inlet and outlet, the screen is located below the conveying belt, the ends of the multiple separating and pushing assemblies scrape the upper surface of the screen, and the ice receiving mechanism is installed in the quick-freezing cavity, located below the screen and used for collecting crushed ice.

The invention relates to the technical field of electronic information storage, and discloses an electronic information storage box with a protection structure, and the electronic information storage box comprises a box body, in the moving process of a bearing shell, the bearing shell drives a sliding rod to move, the sliding rod slides on the inner wall of a fixed shell, the sliding rod drives a vertical block to move, and the vertical block drives an elastic rod to move; under the limitation of a limiting groove, an elastic rod drives a sliding block to move on the inner wall of the limiting groove, the sliding block drives a transverse rod to move, the transverse rod drives a connecting plate to move, the connecting plate drives a round rod to move, the round rod drives square plates to move, and the two square plates get close to each other in the water cooling box to extrude cold water in the water cooling box; and cold water enters the elastic pipe and enters the water bag through the elastic pipe, so that the water bag is filled with the cold water, the cold water is conducted into the lifting plate through cold transfer, the lifting plate can perform water-cooling heat dissipation work on the hard disk, and the heat dissipation protection effect of the box body on the bearing shell is improved.

The invention discloses an overpressure protection device for a vacuum gauge, and relates to the technical field of overpressure protection of vacuum gauges.The overpressure protection device comprises a main pipe and a control module, a sealing cover is fixedly connected to the right side of the main pipe, three openings are formed in the right side of the sealing cover, and a first fixing pipe is fixedly connected to the inner wall of the opening in the upper portion of the right side of the sealing cover; an exhaust port is formed in the upper side of the middle of the first fixing pipe, a pressure valve is fixedly connected to the inner wall of the first fixing pipe, and a sealing mechanism and a pressure reduction mechanism are arranged in two openings in the lower portion of the right side of the sealing cover correspondingly. And by arranging a second fixing pipe, a telescopic rod and an elastic rod, when the air pressure rises, a mechanical displacement conversion mode can be used for synchronously amplifying and transmitting force to a pressing rod, the induction precision and response sensitivity of the piezoelectric module are enhanced, and the vacuum gauge has the characteristics that the practicability is high, and the use reliability of the vacuum gauge is effectively improved.

The application relates to the field of heat exchangers, and discloses an energy-saving marine plate heat exchanger which comprises a shock resistance assembly, an adjusting assembly, a toughness assembly, a heat exchange assembly, heat exchange plates and a dehumidification assembly. When the ship shakes, the track can slightly shift along with the rubber pad through the installation of the adjusting assembly and the toughness assembly; when the electric motor inside the runner starts, the twisted rope is wound or released under the rotating action of the runner, the elastic rod is deformed, the bending curvature of the elastic rod is changed, the compression amount of the spring is changed, the overall rigidity of the toughness assembly is adjusted, when the moving block moves along the track, the punching block is synchronously displaced through the rigid connection, the X-shaped intersection angle of the two elastic rods is changed, the pre-tightening force of the spring is adjusted, a soft-hard adjustable shock resistance support structure is realized, and the problems of damage and reduced heat exchange efficiency of the heat exchanger caused by shaking are solved.

The invention belongs to the technical field of photovoltaic panel cleaning, and discloses a desert photovoltaic panel cleaning robot which comprises a robot body and a crawler belt arranged on the robot body, and further comprises a first cleaning module and a second cleaning module which are arranged at the front end and the rear end of the robot body correspondingly. And cleaning cloth is wound between the driving mechanism and the guide roller for driving connection, and an elastic rod and a pressing plate are further arranged in the second cleaning module and used for supporting the cleaning cloth downwards. Dust and stubborn adhesion stains on the photovoltaic panel are brushed away through the spiral brush of the first cleaning module, and the second cleaning module is in pressing contact with the surface of the photovoltaic panel through the cleaning cloth wound on the guide rollers. And the self-cleaning mechanism is further arranged to wipe the cleaning cloth, self-cleaning of the cleaning cloth is achieved, and the work cycle of the cleaning cloth is prolonged. And the first cleaning module and the second cleaning module work cooperatively, the sand removing effect is good, and the cleaning efficiency is high.

The invention discloses a method for calculating image force feedback by physically modeling a guide wire based on a discrete elastic rod, which comprises the following steps of: modeling the guide wire into a non-telescopic deformable linear object, representing the center line of the guide wire by adopting an arc length parameterized three-dimensional curve, and describing bending and torsion characteristics by combining an orthogonal material frame; a curvature vector and a torsion angle are calculated through a discretized particle model to simulate the internal state of the guide wire, and the motion of the guide wire is predicted based on a semi-implicit integration method through a Lagrange motion equation; then, coarse detection is carried out in combination with the preprocessed mask image of the blood vessel wall, whether the guide wire makes contact with the blood vessel wall or not is judged, and due to the existence of a preprocessing structure, the detection is faster than a common bounding box which is divided through a tree structure; then, whether the tip of the guide wire penetrates through the blood vessel wall or not is judged through the blood vessel center line and kd-tree, a force feedback calculation model is constructed by combining a spring damping system according to deformation caused to the blood vessel wall, and corresponding feedback force after collision is calculated.

The utility model provides a multifunctional lock bolt, which relates to the technical field of bolts, and comprises a head body, the bottom end of the head body is fixedly connected with a screw rod, the outer surface of the screw rod is provided with a fastening structure, the fastening structure comprises an inserting rod, one side of the inserting rod is fixedly connected with an L-shaped block, and the L-shaped block is fixedly connected with the bottom end of the head body. An L-shaped block is fixedly connected to the top end of the head body, an elastic piece is fixedly connected to the top end of the L-shaped block, a circular groove is formed in the screw rod, two protruding rods are fixedly connected to one side of the elastic rod, and a clamping groove is formed in the top end of the head body. The two elastic rods in the circular grooves are extruded by the surfaces of the inserting rods, so that the convex rods on one sides of the elastic rods extrude the rubber strips, the rubber strips expand outwards to fill the joints of the outer surfaces of the screws and the parts or the nuts, and the screws and the parts or the nuts are fastened. And connection looseness caused by shaking after the screw is connected with a part or a nut is avoided as far as possible. And the stability when the bolt is used is improved.

The utility model discloses a presser foot device and circuit board processing equipment, the presser foot device comprises a scrap suction cover body, a presser foot assembly and a driving assembly, the scrap suction cover body is provided with a through hole, the presser foot assembly comprises a sliding plate, a first presser foot and a second presser foot, the sliding plate is movably connected with the scrap suction cover body, the first presser foot and the second presser foot are respectively arranged on the sliding plate, and the driving assembly is arranged on the sliding plate. The driving assembly comprises a driving piece and an elastic rod, the driving piece is connected with the scrap suction cover body, one end of the elastic rod is connected with the driving piece, the other end of the elastic rod is connected with the sliding plate, and the driving assembly is used for driving the sliding plate to move between the first position and the second position relative to the scrap suction cover body. The driving piece is connected with the sliding plate through the elastic rod, and the elastic rod has flexibility and toughness, so that the elastic rod has stretching rigidity while having pulling rigidity, the driving piece can pull the sliding plate to move or push the sliding plate to move through the elastic rod, the purpose of switching the presser foot is achieved, and the presser foot switching mechanism is simple in structure and low in cost.

The invention relates to the technical field of automobile maintenance equipment, and discloses a new energy automobile chassis maintenance manipulator which comprises a base, a first mechanical gripper arm is fixedly connected to the upper surface of the base, a second mechanical gripper arm is rotatably connected to the interior of the first mechanical gripper arm, and a replacement mechanism is rotatably connected to the interior of the second mechanical gripper arm. A first protection mechanism is fixedly connected to the lower surface of the base, a second protection mechanism is fixedly connected to the outer surface of the first mechanical claw arm, and the first protection mechanism enables the manipulator to move conveniently, reduces the load of a motor, eliminates interference of circular motion and stabilizes operation of the claw arms. The clamping jaw replacing mechanism can replace clamping jaws according to needs, and the grabbing force is dispersed; the second protection mechanism is provided with an elastic rod piece at a key part to buffer external force; the first protection mechanism and the second protection mechanism cooperate with each other, the tremor risk of the claw arm is reduced, and the manipulator is assisted to operate flexibly and stably during maintenance.

The invention relates to a repeatable unfolding and folding mechanism for a large solar wing, which aims to solve the problem that the requirements of the large solar wing on high rigidity, high reliability and repeatable unfolding and folding are difficult to meet in the prior art, and comprises a motor, two double-layer thin-wall elastic rod unfolding and folding mechanisms, a solar wing assembly and a gear transmission assembly, the two double-layer thin-wall elastic rod unfolding and folding mechanisms are arranged in parallel, the solar wing assembly is located between the two double-layer thin-wall elastic rod unfolding and folding mechanisms, and the motor drives the two double-layer thin-wall elastic rod unfolding and folding mechanisms to be unfolded or folded synchronously through the gear transmission assembly. The solar wing assembly is unfolded or folded through the two double-layer thin-wall elastic rod unfolding and folding mechanisms. The invention provides an unfolding and folding mechanism which is light in weight, simple in structure, large in unfolding and folding ratio, higher in rigidity and capable of being repeatedly unfolded and folded by utilizing a motor to drive a wound and folded double-layer thin-wall elastic rod to stretch out to recover rod-shaped unfolding and support a solar wing, and relates to the technical field of spaceflight.

The utility model provides a battery supporting structure for restraining a tray, and belongs to the technical field of battery manufacturing. The battery supporting structure of the restraining tray comprises a restraining sliding block, a partition plate and a guide shaft fixed on the tray, an arc-shaped groove clamped and embedded with the guide shaft is formed in the back face of the restraining sliding block, an insertion groove is formed in the front face of the restraining sliding block, the two ends of the partition plate are each provided with a protruding upper insertion strip and a protruding lower insertion strip, and the upper insertion strips and the lower insertion strips are the same in width and are aligned up and down. The upper insertion strip and the lower insertion strip are clamped and embedded in the insertion groove, an elastic locking piece is clamped and embedded between the upper insertion strip and the lower insertion strip, the two sides of the elastic locking piece are provided with elastic rods which are opened outwards, and the outer ends of the elastic rods abut against the inner wall of the insertion groove. The elastic locking pieces are additionally arranged at the two ends of the partition plate, the connection firmness of the partition plate and the restraining sliding block can be improved through the expanded elastic rods, and the partition plate is not prone to being disengaged from the restraining sliding block.

The invention relates to the technical field of conveying devices, and discloses an intelligent suspension conveying device for waterproof polyester fabric production, which comprises a support frame, the inner wall of the support frame is rotatably connected with an output shaft, the circumferential surface of the output shaft is fixedly connected with a delivery wheel, and the inner wall of the delivery wheel is in transmission connection with a chain. The front portion of the chain is fixedly connected with a fixing block, the bottom of the fixing block is fixedly connected with a fixing frame, the inner wall of the fixing frame is rotationally connected with a rotating rod through a torsional spring, and the inner wall of the rotating rod is slidably connected with a first elastic rod through a spring. Damage caused by cloth displacement is effectively avoided, the cloth is prevented from falling off accidentally in the conveying process, safety accidents caused by the fact that the cloth winds equipment or falls to a production area are avoided, and stable and safe operation guarantee is provided for intelligent automatic production.

The utility model provides a roadway isolation warning device for coal mining, which comprises a baffle plate, a back plate is arranged on the rear side of the baffle plate, and the baffle plate and the back plate are connected through a plurality of elastic rods; a warning reflective sticker is attached to the front side of the baffle, a plurality of red lamp beads are further arranged on the front side of the baffle, and an infrared sensor and an audible and visual alarm are further arranged on the front side of the baffle. A plurality of supports are arranged on one side of the baffle, inserting rods are arranged on the supports, a plurality of positioning frames corresponding to the supports are arranged on the other side of the baffle, and inserting holes corresponding to the inserting rods are formed in the positioning frames. A mounting frame is arranged on the rear side of the back plate, and supporting legs are hinged to the mounting frame. According to the roadway isolation warning device for coal mining, due to the structural design, a plurality of isolation warning devices can be conveniently disassembled and assembled, and the roadway isolation warning device is ingenious and practical in structural design and rich in function.

The invention relates to the technical field of mounting equipment, and discloses a reverse osmosis membrane with high mounting stability, the reverse osmosis membrane comprises a mounting cylinder, the end part of the mounting cylinder is rotatably connected with a sealing cover, the surface of the sealing cover is fixedly connected with a water inlet pipe, and the bottom of the inner wall of the mounting cylinder is provided with a stress groove. By arranging the mounting mechanism, a reverse osmosis membrane is firstly put into a mounting cylinder, when the end part of the reverse osmosis membrane is in contact with the surface of a stress disc, the reverse osmosis membrane extrudes the stress disc through the weight of the reverse osmosis membrane, and when the stress disc is extruded, the stress disc moves downwards; when a stress disc moves, a stress elastic rod is pushed to contract downwards, when the stress disc moves, a right-angle rod is pulled to move downwards, when the right-angle rod moves, a driven ring is pulled to move downwards, and when the driven ring moves, a sliding frame is pushed to slide downwards on the inner wall of a sliding groove. When the sliding frame slides, the push rods can be pushed to move towards each other.

The utility model discloses an air conditioning unit foaming panel convenient to install, which comprises an air conditioner shell, a detachable panel assembly is installed on the side face of the air conditioner shell, and a clamping fixing assembly used for installing the panel assembly is arranged on the side face of the air conditioner shell and corresponds to the panel assembly. A pop-up assembly used for popping up the panel assembly is installed at the position, corresponding to the panel assembly, in the air conditioner shell. The operating block is pulled through the operating handle, so that the sliding clamping rod can be driven to move, the sliding clamping rod is separated from the corresponding clamping groove, clamping connection to the mounting ring can be further separated, the connecting block can be driven to move under the elastic force effect of the second sleeve spring, the mounting ring is bounced rightwards through the sliding elastic rod, and the mounting ring can be conveniently clamped. And therefore, the foaming panel main body can be conveniently disassembled, and the practicability of the foaming panel is improved.

A trunking lamp with multiple installation modes comprises glasses legs, elastic rods and a glasses frame. Stop blocks are arranged on the glasses legs; the elastic rods are mounted on the glasses legs and correspond to the stop blocks, and movable gaps are formed between the elastic rods and the stop blocks; pile heads are mounted on the glasses frame and are hinged with elastic rods, so that the glasses legs can be folded or expanded; wherein the elastic rods can be driven to deform at the movable gaps by pulling the completely expanded glasses legs, and the stop blocks abut against the deformed elastic rods; compared with the prior art, according to the structure, outward bouncing is realized by designing the elastic rods, so that the glasses legs can be made of conventional materials, the overall cost is effectively reduced, the deformation amplitude of the elastic rods is limited by designing the stop blocks, the elastic rods are prevented from losing the outward bouncing function due to excessive expansion, and the overall service life is prolonged.

An anti-ponding foldable canopy tent including a tent frame assembly, a ceiling assembly, and a tarpaulin is provided. The ceiling assembly is mounted on the tent frame assembly. The tarpaulin is disposed on the ceiling assembly. The ceiling assembly includes a central lock mechanism and multiple foldable arm mechanisms annularly distributed about a periphery of the central lock mechanism. The ceiling assembly also includes multiple elastic rod mechanisms annularly distributed about the periphery of the central lock mechanism. A first end of each of the elastic rod mechanisms is rotatably connected to the central lock mechanism. A second end of each of the elastic rod mechanisms is connected to the tarpaulin for tensioning the tarpaulin. When the foldable canopy tent is in an extended state, the elastic rod mechanisms support the tarpaulin tightly to preclude ponding on the tarpaulin. The tarpaulin is elastic during tensioning, which precludes ponding.

The utility model discloses a check valve with a filter mechanism, which comprises a valve body, a filter screen is fixedly connected in the valve body, a rotating shaft is mounted in the filter screen through a bearing, an impeller is fixedly connected to the outer side of the rotating shaft, an elastic rod is fixedly connected to the side surface of the filter screen, a raised head is fixedly connected to the elastic rod, and the raised head is fixedly connected to the valve body. The filter screen, the impeller, the raised head, the elastic rod and other parts are designed to be used in cooperation, liquid flowing in the valve body can be filtered through the filter screen, foreign matter doped in the liquid is prevented from influencing use of the valve body, the liquid flowing at a high speed can drive the impeller to rotate, the impeller rotates to impact the upper portion of the raised head, and the working efficiency is improved. And the raised head can drive the elastic rod to vibrate, so that the filter screen is driven to vibrate, and abnormal working of the valve body caused by blockage of the filter screen is avoided.

The utility model relates to the field of building construction equipment, and discloses a splicing fence for building construction, which comprises a supporting column, an auxiliary base plate is fixedly mounted at the bottom of the rear surface of the supporting column, a splicing component is arranged at a groove of the right surface of the supporting column, and a protective component is arranged on the front surface of the supporting column. The protection assembly comprises an inserting block, a positioning block is fixedly connected to the axis of the front surface of the supporting column, elastic rods are fixedly connected to grooves in the left surface and the right surface of the inserting block, and a telescopic rod is fixedly connected to the axis of the front surface of the inserting block. According to the utility model, through the mutual cooperation of the protection plate, the plugging block, the positioning block and other parts in the protection assembly, the installation convenience of the protection assembly is improved, the phenomenon that the equipment is directly damaged due to the impact effect is avoided, the protection performance and the protection range of the equipment are improved, and the protection effect of the equipment is enhanced.

The present invention relates to an inertia-superdamping coupled synergistic unit cell and local resonance metamaterial. The frame includes an inner shell and an outer shell. The positive stiffness-negative stiffness unit includes a second slider, a first slider, and a second connecting rod. The second slider slides and extends into the inner shell. The first slider is provided in the inner shell. The extended end of the second slider is hinged to the first slider via the second connecting rod, and the extended end is fixedly connected to the outer shell via an elastic rod. The other end of the inner shell extending from the second slider is fixedly connected to the outer shell via an elastic rod. The second connecting rod is configured as a diamond-shaped connecting rod mechanism including four mutually hinged connecting rods. The lever rotation inertia unit includes a first connecting rod and a sector disk. The sector disk is rotatably provided in the inner shell. The other end where the first slider and the second slider are hinged is hinged to the sector disk via the first connecting rod. The eddy current superdamping unit includes magnets, and the sector disk is provided between the magnets. Compared with the prior art, the present invention can achieve synergistic control of structural vibration under broadband multi-dimensional excitation.