68results about How to "No damage will occur" patented technology

The invention relates to a sample preparation mold for a fractured rock mass model sample. The sample preparation mold comprises a base and an outer frame structure, wherein an inner cavity of the outer frame structure is used for forming the fractured rock mass model sample, and the outer frame structure is positioned on the base. The sample preparation mold further comprises a plug board and a fracture position regulating structure, wherein the plug board is made of a fusible alloy material, the fusible alloy material is formed in a solid state at the normal temperature and can melt after being heated to a melting point temperature; the fracture position regulating structure is positioned in the outer frame structure and is connected with the plug board. The sample preparation mold provided by the invention can conveniently and quickly make the rock mass model sample with a complicated three-dimensional fracture, strictly control the size and the direction of the fracture, simultaneously consider the situation whether the fracture is filled or not filled or not, satisfy the requirements for repeated sample preparation and be combined and assembled according to different sample sizes, so that the practicability of the sample preparation mold is improved.

The invention belongs to the technical field of a conveyer device, and relates to a roll cloth loading conveyor which has the technical proposal that a front bracket and a rear bracket are arranged along the vertical direction; an inclined bracket is connected between the upper ends of the front and the rear brackets; transmission shafts are respectively arranged at the upper end of the rear bracket and the lower end of the inclined bracket; the two ends of the transmission shafts are respectively provided with sprocket wheels, and the sprocket wheels arranged at the same side of the transmission shafts are respectively hung with a ring-shaped chain; material plates are articulated on the outer surface of the ring-shaped chains at intervals, and the ring-shaped chains are parallel to the transmission shafts; the transmission shaft on the rear bracket is provided with a driving wheel in a coaxial way, and the driving wheel is driven by a motor and a transmission device; the outer inclined plane of the inclined bracket arranged between the two transmission shafts is evenly distributed with pin rollers that are parallel to the transmission shafts and used for supporting the ring-shaped chains. The roll cloth loading conveyor has the advantages of being time-saving and labor-saving, high in conveying efficiency, and capable of conveying the roll cloth into a truck in a good condition.

The invention relates to a smoke desulfuration cycle slurry spray device, which are layered in the adsorption tower. Each spray device is formed by at least two parallel spray main tube and the spray sub tubes branched from the spray main tube. The dual-direction ejectors that branched from the spray sub tubes are interlaced into mesh spray layer; two parallel spray main tubes are through the hole of support beam inside the adsorption tower, and horizontally fixed via single-beam support. The invention can solve the problems that not enough mixed between the smoke and cycle slurry; lower desulfuration effect; and easy abrasion and leakage at the interface between the spray tubes and the adsorption tower. The invention can be used in wet smoke desulfuration adsorption tower to utilize the limestone or lime slurry to adsorb the sulfur dioxide and sulfur trioxide.

The invention discloses an electrodynamic type intelligent breaker, wherein an electrodynamic type operating mechanism is arranged on a cover; the mechanism comprises a motor, a transmission mechanism driven by the motor, and a one-way clutch mechanism; the one-way clutch mechanism comprises clutch ratchets relatively fixedly arranged on an output shaft, a driving board provided with a round clutch hole, and a clutch piece for driving the driving board to rotate under the action of the clutch ratchets; a plurality of clutch ratchets are uniformly arranged on the periphery of an eccentric ratchets; one end face of each clutch ratchet is a driving face, and the other end face is an arc-shaped slide face; the eccentric ratchet is arranged in the round clutch hole of the driving board; both sides of the driving board are respectively provided with a limit hole communicated with the clutch hole, and the arrangement direction of the limit hole is perpendicular to the clutch hole; the clutch piece is a clipping reed provided with a gap; and reed bodies arranged on both ends of the gap are inserted into the limit hole of the driving board and clipped on the clutch ratchets at the two opposite side ends of the clutch ratchet. The invention has the advantages of good reliability, difficult damage and lower cost.

The invention is concerned with a kind of Zn-MnO2 battery and its product method belonging to cell technology field. It relates to bucket shell with bottom and wall, ring zinc bucket without cover as the cathode and inside of the said shell, manganese dioxide mixture as reactant, graphite as educing body of cell, false bottom sheet metal and closed cover on the top of bucket shell. The Zn-MnO2 battery is made up by the product of ring zinc bucket, the product of bucket shell, the product of cathode of Zn-MnO2 battery and assembling working procedure. The cathode of this cell is the ring zinc bucket, and the bucket shell having bottom is made up of plastic or other inorganic materials and the shell doesn't take part in electrochemistry reaction. This reduces the product cost and saves the dosage of zinc with simple craftwork. It solves the problems about liquid leakage of Zn-MnO2 battery and corrosion of electrical apparatus and circuit.

The invention discloses a multifunctional life buoy which comprises a life buoy body, wherein the life buoy body is provided with a mobile telephone groove used for placing a mobile phone; one side of the mobile phone groove is provided with a pop-up flip cover; after being closed, the flip cover is hermetically connected with the life buoy body; one side of the life buoy body is provided with at least one floating ball used for storing food or water; the floating ball is provided with a connecting piece; and the floating ball and the life buoy body are fixed by virtue of the connecting piece. According to the technical scheme adopted by the invention, a user can carry a mobile telephone while swimming or running away from disaster, a mobile telephone box can effectively protect the mobile telephone, and a condition that the mobile telephone is damaged due to water inflow cannot occur; and when being in danger, the user can utilize the mobile telephone to ask for help, and the floating ball capable of storing the food is arranged on the life buoy, so that the food brought by the floating ball can be used for prolonging the life time of the person in distress, and the rescued possibility is increased.

The invention discloses a high-efficiency tablet press with a feed chute. The tablet press comprises a support table (1), a cone (3), and a disc (2) arranged on the support table (1), wherein conical forming holes (7) are formed in the disc (2); cylindrical upper punches (5) are arranged on the lower end face of the cone (3); the size of the upper punches (5) is matched with that of the forming holes (7); the disc (2) is linked with a motor arranged in the support table (1); lower punches (4) are arranged on the support table (1); and the arc feed chute (6) is fixed on the support table (1) through bolts. By the tablet press, powder can be uniformly stressed in the forming process of tablets, high forming quality is achieved, the powder can be prevented from being accumulated or scattered, and the formed tablets are easily taken out.

The invention discloses a printing machine, and relates to the technical field of printing machines. According to the printing machine, a fixing column is fixedly connected to the rear surface of a first bearing; a connecting rod is fixedly connected to the right end of the fixing column; a rotating column is connected to the rear surface of the left end of the connecting rod in a sleeving mode; asliding strip is connected to the interior of the front end of the rotating column; a vertical plate is fixedly connected to the left end of the sliding strip; a sliding block is fixedly connected tothe front surface of the vertical plate; a square groove is formed in the rear surface of a box body; and a pressing plate is fixedly connected to the upper end of the vertical plate. According to the printing machine, a motor is started, the first bearing rotates to drive a first roller to rotate, raw cloth can be conveyed clockwise, the sliding strip pushes the sliding block to move left and right in the square groove, the vertical plate drives the pressing plate to move left and right, the raw cloth is repeatedly flattened, so that the raw cloth can be effectively kept flat during feeding,and printing is facilitated; and a heating pipe is arranged at the right end of a printing device, a heat insulation seat is fixedly connected to the lower end of the heating pipe, when the raw clothis conveyed to the position below the heating pipe, printing ink can be uniformly heated, and therefore drying and forming of the ink can be accelerated more effectively.

The invention relates to the technical field of mining industry mining filling, and concretely discloses a filling material and a using method thereof. The filling material comprises 8-10% of a cementing agent, 25-30% of fly ash, 25-30% of coal gangue, 30-35% of aeolian sands and 1-5% of plant fibers; and the cement includes, by mass, 55-60% of a modified mineral powder, 20-25% of composite gypsum, 10-12% of a Portland cement clinker and 8-10% of a compound admixture. A paste formed by the filling material in the use process has the advantages of good cohesive force, good stability, low bleeding rate, high shear resistance, high compressive strength and low raw material cost, and solves the problem of difficulty in drawing of raw materials for the filling material in the aeolian sand area.

The invention belongs to the technical field of unmanned aerial vehicles and relates to a multifunctional unmanned aerial vehicle. The multifunctional unmanned aerial vehicle comprises two unmanned aerial vehicles; the multifunctional unmanned aerial vehicle further comprises an unmanned aerial vehicle body, a first driving mechanism, a second driving mechanism, a searchlighting mechanism, a bearing mechanism and an inserting mechanism; the structural principle of the two unmanned aerial vehicles are identical; the driving modes of the two unmanned aerial vehicles are the identical; the firstdriving mechanism, the second driving mechanism, the searchlighting mechanism, the bearing mechanism and the inserting mechanism are all arranged on the unmanned aerial vehicle body; the first drivingmechanism and the second driving mechanism are both arranged in the unmanned aerial vehicle body and connected with the unmanned aerial vehicle body; the searchlighting mechanism is arranged at the top of the unmanned aerial vehicle body; and the bearing mechanism and the inserting mechanism are both arranged at the bottom of the unmanned aerial vehicle body. The finished product of a disaster rescue unmanned aerial vehicle is large, and the disaster rescue unmanned aerial vehicle just has a single actual application function and cannot be used for a long time when rescue is not needed, and therefore, resource waste is caused. With the multifunctional unmanned aerial vehicle of the invention adopted, the above problem can be solved.

The invention discloses a method for forming a notch on a pipe, which is characterized by comprising: sleeving a pipe on a male die; stamping to a bearing block which has a feeding hole that has the same size as a notch to be formed; and pressing the male die into the feeding hole to form chopping type cutting to form the notch on the pipe. When the method is used, the damage to the die is relieved, deformation is prevented during the formation of the notch, and the cut is flat.

The invention discloses an efficient laminating mechanism for corrugated boards for packaging, and relates to the technical field of corrugated paper for packaging. The efficient laminating mechanismcomprises a laminating roller frame, an extruding roller and a laminating roller, wherein the extruding roller and the laminating roller which are distributed up and down are arranged on the laminating roller frame, a gap for allowing the corrugated paper and the liner paper to penetrate through is reserved between the extrusion roller and the laminating roller, and the gap between the extrusion roller and the laminating roller is adjustable. The invention has the beneficial effects that the gap between the extrusion roller and the laminating roller is adjustable, so that the laminating effectof the corrugated paper and the liner paper can be guaranteed, and the situation that the wave shape corrugated is damaged due to overpressure can be avoided, when the corrugated paper and the linerpaper are attached to each other, so that the occurrence of defective products caused by incomplete laminating of the corrugated paper and the liner paper is avoided, and the quality of the corrugatedpaper board can be effectively guaranteed; in addition, a rotating guide roller can guarantee that the gluing surface of the corrugated paper is upward, so that the structure of a glue box is relatively simple; compared with a glue supply mode above the glue box, the glue box does not need to be subjected to complex sealing treatment.

The invention provides an automatic drive vehicle semi-physical simulation testing system and method; the system comprises a vehicle body, a fly wheel and a processing module; the vehicle body is fixed on an external lifting machine, and provided with tires that make contact with the flywheel; the vehicle body is used for driving the tires to rotate via an internal engine; the tires rotate to drive the flywheel to rotate; the processing module is used for determining rotation information of the flywheel; the method comprises the following steps: acquiring the vehicle body drive information; determining the vehicle body driving safety state according to the flywheel rotation information and the vehicle body drive information. The system and method need a small test field, and can better ensure the sensors on the automatic drive vehicle not to be damaged in a testing process, thus reducing the testing cost.

The invention discloses a financial voucher punching device in the technical field of punching devices. The inner cavity of the motor protection shell is wrapped with a motor, and the power end on the left side of the motor is provided with a rotating plate through a rotating shaft. The top of the rotating plate is provided with a rotating bar, and two groups of movable plates with the same structure are movably connected to the outer wall of the rotating bar. The device has a simple structure and is easy to operate. The rotation of the motor provides effective power. The cooperation between the plate and the movable plate effectively liberates the labor force, and the vertical bar that reciprocates in the vertical direction on the limit horizontal plate drives the punching operation for the financial voucher, and the gap between the fixed panel and the movable platen bracket It can well fix the financial certificate and ensure that the financial certificate will not be damaged due to displacement during the punching operation. The buffer sleeves installed on both sides of the bottom of the movable pressure plate also effectively reduce the pressure given by the limit pressure plate ,Improved work efficiency.

The invention relates to a finishing and conveying mechanism with a controllable process. The finishing and conveying mechanism adopts a finishing and conveying device with the detectable conveying process, the action process of a pushing cylinder and a conveying cylinder is intelligently controlled by a machine tool PLC, the conveying speed is controlled to be synchronous with a machine tool, anda vibrating plate performs automatic feeding. Since stroke detection switches are installed at the front positions and the rear positions of the conveying cylinder and the pushing cylinder, and oncesignals are not detected at the front position and the rear position of the pushing cylinder and the front position and the rear position of the conveying cylinder, the machine tool can issue a faultalarm and shuts down. The structure safety is high, the performance is reliable, the finishing speed is high, and the work efficiency is high.

The invention relates to a test mold for manufacturing a test piece for testing basic mechanical properties of building materials and discloses a pre-press bottom-pushing type test mold. The test mold comprises a top pressing device, an upper test mold body, a lower test mold body, a bottom pushing device and a bottom-pushing threaded rod, wherein a test piece is arranged in the upper test mold body; the upper test mold body and the lower test mold body are in threaded connection; the bottom pushing device is arranged in the lower test mold body and performs mold stripping under axial force applied by the bottom-pushing threaded rod. Additionally, loads applied to the axial direction of the test piece is converted to loads on the edge of the test piece through a designed hollow cylinder structure transition zone; during mold stripping, pre-press force is applied to the upper part and the lower part of the test piece, so that the test piece can be slowly pushed out of the upper test mold body under the constrained condition, and the defects of edge missing and corner missing of the test piece can be effectively avoided during mold stripping in the structure design manner. The test mold is designed on the basis of optimization of a traditional test mold structure, is easy to strip, has good water retention performance, can be used for manufacturing test pieces made of different materials and in different sizes and has a wide application range.

A self-energy-storing straight rib windproof self-recovery umbrella comprises an upper nest, a middle-lower nest structure, a middle rod, long ribs, short ribs and a handle, the upper nest is fixedly arranged on the upper portion of the middle rod, the middle-lower nest structure is slidably arranged on the middle rod in a sleeving mode and located under the upper nest, the middle rod is sleeved with a limiting piece which is located between the upper nest and the middle-lower nest structure, umbrella cloth is arranged on the top surface of the long ribs, each long rib comprises a fist umbrella rib and a second umbrella rib, the rear end of each first umbrella rib is hinged to the upper nest, a rotatable and elastic rotating self-recovery mechanism is arranged between the front end of each first umbrella rib and the rear end of the corresponding second umbrella rib, the rear end of each second umbrella rib is located on the top surface of the front end of the corresponding first umbrella rib, the front end of each umbrella rib is connected with the umbrella cloth, the rear end of each short rib is hinged to the middle-lower nest structure, the front end of each short rib is hinged to the corresponding first umbrella rib, the handle is arranged at the bottom end of the middle rod, and when being folded, the middle-lower nest structure is arranged on the handle in a clamped mode. When in a windy day, the second umbrella ribs still have the rain resisting function and can be recovered to the original positions.

The invention relates to the technical field of photovoltaic support brackets and discloses a combined photovoltaic support bracket capable of expanding the protection scope. The combined photovoltaicsupport bracket comprises a fixed seat, wherein regulating mechanisms are symmetrically arranged at four corners of the bottom of the fixed seat; an L-shaped protection mechanism is arranged at the top of each regulating mechanism; a photovoltaic cell panel is arranged among the four L-shaped protection mechanisms; the bottom of each L-shaped protection mechanism is provided with a cross protection mechanism at the lower part of the photovoltaic cell panel; the left side and the right side of the bottom of the fixed seat are fixedly connected with L-shaped positioning plates; and the surfaceof each L-shaped positioning plate is in threaded connection with a positioning bolt. The problem that the protection scope at each corner of the photovoltaic support bracket is relatively small is solved. Through mutual cooperation of the regulating mechanisms, the L-shaped protection mechanisms and the cross protection mechanisms, independent or cooperative work can be implemented, the protection scope at each corner of the photovoltaic support bracket is expanded, the normal irradiation angle is not affected and the photovoltaic cell panel does not fall off or is not damaged.

The invention discloses a multifunctional stirring model test box and a use method thereof, and belongs to the field of indoor test equipment. The test box comprises a base, a formwork system, a support, a fixed frame, a drill rod, angle iron and an angle support. The formwork system comprises a front side formwork, a rear side formwork, a left side formwork, a right side formwork, and a top formwork, the support comprises a vertical rod structure and a transverse rod structure, the transverse rod structure is provided with a horizontal fixed hole and a baffle, a vertical fixed hole is formedin the baffle, the fixed frame comprises a fixed ring, a fixed rod and a fixing device, the fixed ring comprises an upper cover plate, a lower cover plate, a bearing and a bolt hole, the fixed rod comprises a wedge body, a rod body, and bolt holes, and the fixing device comprises a fixing device body, side lugs and bolt holes. In-situ stress conditions of actual soil can be simulated, experiment data are more reasonable, free moving of the drill rod is achieved, multiple piles can be made in one-time experiment, and the experiment efficiency can be improved.

The invention relates to a waterproof anti-shock lock master control box. The waterproof anti-shock lock master control box sequentially comprises a front circuit board bin, a speed reduction motor, amaster control circuit board, a middle partition board and a rear battery bin which are arranged from front to back, an antenna cover plate is arranged on the outer side of the front circuit board bin, a waterproof seal groove is formed in the inner side of the antenna cover plate, a light guide column is arranged on the outer portion, and is in tight connection with the antenna cover plate, a key board is arranged below the master control circuit board, and comprises multiple keys, a key seal side is arranged around the keys, and a pressing plate is arranged in front of the keys. The waterproof anti-shock lock master control box has the beneficial effects that when the lock control box is rained or is in the humid environment, the damage condition is avoided, the condition that due to the fact that the lock master control box collides with external force, and the lock fails is avoided, potential safety hazards are removed, and the use cost is reduced.

The invention discloses a squeeze cage lifting device, comprising a rack; the rack is internally provided with a movable shelf; a driving device capable of driving the movable shelf to make reciprocating motion along the vertical direction is arranged on the top of the rack; a space, in which a squeeze cage can be placed, is formed under the movable shelf; the movable shelf is provided with a suspending piece; the movable shelf is also provided with a linkage device capable of driving the suspending piece to be connected with the squeeze cage in a detachable way; the movable shelf is also provided with a position sensing device. The squeeze cage lifting device can avoid equipment damage in the lifting process of the squeeze cage, thus guaranteeing the safe and stable running of equipment. The invention also discloses a squeezing device applying the squeeze cage lifting device.

The invention relates to the technical field of unmanned aerial vehicles, and discloses an unmanned aerial vehicle protection mechanism for preventing crash in the case of signal loss. The unmanned aerial vehicle protection mechanism comprises a unmanned aerial vehicle body, wherein a protection device is fixedly installed in the middle part of the bottom end of an inner cavity of the unmanned aerial vehicle body; the protection device is divided into a triggering device and an opening mechanism; the triggering device is fixedly installed in the middle part of the inner cavity of the unmannedaerial vehicle body; and one end of the interior of the triggering device is communicated with an inner cavity of the opening mechanism, and a folding umbrella-shaped skeleton is fixedly installed atthe bottom end of the opening mechanism. According to the unmanned aerial vehicle protection mechanism for preventing crash in the case of signal loss, by arranging the protection device, when the unmanned aerial vehicle falls, the protection device can be extended order by order and the folding umbrella-shaped skeleton can be finally opened; no matter in what kind of posture the unmanned aerial vehicle falls to the ground, effective protection measures can be formed for the unmanned aerial vehicle; and compared with an existing unmanned aerial vehicle protection device, the protection effectis better and the protection range is more comprehensive, and therefore, a situation that no damage is generated when the unmanned aerial vehicle falls accidentally is ensured.

The invention discloses a preparation method for preparing multi-element nitride based on a mixed deposition technology. The preparation method comprises the following steps of first, material and equipment preparation, wherein a four-blade end milling cutter is placed into a reaction chamber, and the temperature is raised to carry out surface heat treatment; and second, dosage calculation and equipment testing, wherein a coating mixing test is carried out according to material selection determination in an operation area and multi-arc ion plating and sputtering structure fixation. According to the preparation method for preparing the multi-element nitride based on the mixed deposition technology, the milling cutter is subjected to heating treatment through the reaction chamber, so that the fixing and absorbing of a spraying material by the milling cutter are guaranteed; the added material is sprayed to the surface of the milling cutter through multi-arc ion plating, so that the adhesiveness between a coating and a substrate is guaranteed; and complete combination of the AlCrWSi nano-composite coating adhering to the outer surface of the cooled milling cutter is ensured through multi-arc ion plating and sputtering simultaneous mixed spraying, so that the wear resistance of the cutter is changed, and the service life of the cutter is prolonged.

The invention belongs to the technical field of a conveyer device, and relates to a roll cloth loading conveyor which has the technical proposal that a front bracket and a rear bracket are arranged along the vertical direction; an inclined bracket is connected between the upper ends of the front and the rear brackets; transmission shafts are respectively arranged at the upper end of the rear bracket and the lower end of the inclined bracket; the two ends of the transmission shafts are respectively provided with sprocket wheels, and the sprocket wheels arranged at the same side of the transmission shafts are respectively hung with a ring-shaped chain; material plates are articulated on the outer surface of the ring-shaped chains at intervals, and the ring-shaped chains are parallel to the transmission shafts; the transmission shaft on the rear bracket is provided with a driving wheel in a coaxial way, and the driving wheel is driven by a motor and a transmission device; the outer inclined plane of the inclined bracket arranged between the two transmission shafts is evenly distributed with pin rollers that are parallel to the transmission shafts and used for supporting the ring-shaped chains. The roll cloth loading conveyor has the advantages of being time-saving and labor-saving, high in conveying efficiency, and capable of conveying the roll cloth into a truck in a good condition.

The invention relates to the technical field of cutter sleeves of horizontal machining centers, relates to a special device for replacing a broach spring and a using method thereof, and aims to conveniently realize the replacement of the broach spring, avoid the damage phenomenon and reduce the cost. The invention simultaneously provide a corresponding using method. The method comprises the specific steps of (1) mounting a steel ball and the spring into an outer circular hole in a shaft sleeve assembly and then placing the steel ball and the spring at the inner side of a spring pressing sheet;(2) pressing the spring pressing plate against the outer wall of the shaft sleeve assembly to fix the spring in the outer circular hole of the shaft sleeve assembly; (3) extending the spring pressingsheet and the shaft sleeve assembly into a cutter sleeve of the device and reach a mounting position; (4) pushing a connecting rod to enable a push plate to push against the shaft sleeve assembly; separating the barrel and the spring pressing sheet from the cutter sleeve; and remaining shaft sleeve assembly in the cutter sleeve so as to finish mounting.

The invention belongs to the technical field of drones, and relates to a multifunctional drone. It includes two unmanned aerial vehicles, and also includes the unmanned aerial vehicle body, the first driving mechanism, the second driving mechanism, the search mechanism, the carrying mechanism and the plugging mechanism. The structural principles of the two unmanned aerial vehicles are the same, The first drive mechanism, the second drive mechanism, the search mechanism, the bearing mechanism and the plug-in mechanism are all arranged on the drone body, and the first drive mechanism and the second drive mechanism are all arranged inside the drone body In addition, the search mechanism connected with the UAV body is arranged on the top of the UAV body, and the carrying mechanism and the plug-in mechanism are both arranged at the bottom of the UAV body. To solve the problem that the disaster rescue unmanned aerial vehicle in the prior art has a large finished product and a single purpose in actual application, and cannot be used for a long time when there is no need for rescue, resulting in a waste of resources.

The invention discloses a method for merging photon energy into a fabric. A moistened fabric is put in the hearth of a photon energy activation apparatus, the photon energy activation apparatus comprises a heating device and a photon energy crystal carrier, the photon energy crystal carrier is placed in the hearth of the photon energy activation apparatus, and the photon energy crystal carrier is heated to activate photon energy; and the photon energy is injected into the fibers of the fabric and is combined with the fibers of the fabric. The method allows the photon energy to be injected to the fabric, the fabric injected with the photon energy can be processed as needed to make various products, such as health protectors, clothes, bedding and clothing, the products have health efficacies, the fabric also has original functions, and the photon energy merged into the fabric is combined with the fabric. No shedding or damage phenomena appear.

A self-energy-storing straight rib windproof self-recovery umbrella comprises an upper nest, a middle-lower nest structure, a middle rod, long ribs, short ribs and a handle, the upper nest is fixedly arranged on the upper portion of the middle rod, the middle-lower nest structure is slidably arranged on the middle rod in a sleeving mode and located under the upper nest, the middle rod is sleeved with a limiting piece which is located between the upper nest and the middle-lower nest structure, umbrella cloth is arranged on the top surface of the long ribs, each long rib comprises a fist umbrella rib and a second umbrella rib, the rear end of each first umbrella rib is hinged to the upper nest, a rotatable and elastic rotating self-recovery mechanism is arranged between the front end of each first umbrella rib and the rear end of the corresponding second umbrella rib, the rear end of each second umbrella rib is located on the top surface of the front end of the corresponding first umbrella rib, the front end of each umbrella rib is connected with the umbrella cloth, the rear end of each short rib is hinged to the middle-lower nest structure, the front end of each short rib is hinged to the corresponding first umbrella rib, the handle is arranged at the bottom end of the middle rod, and when being folded, the middle-lower nest structure is arranged on the handle in a clamped mode. When in a windy day, the second umbrella ribs still have the rain resisting function and can be recovered to the original positions.