155results about How to "Large amount of compression" patented technology

The invention relates to a moving die compressive stress decomposing and forming method, a volume spring and a U-shaped bolt composite bending die. Aiming at the problems that under cold pressing, with the 1-2mm large tolerance range of the forging stock thickness of a U-shaped bolt, the rebound of the U-shaped bolt can not be finished in an one-step forming way when a clearance between a convex die and a concave die of a bending die is large, and the die is easy to crush and break open when the clearance is small, and the production efficiency is low, accordingly, a forming die structure of the convex die and the moving concave die under a required clearance state that the clearance between the convex die and the concave die is 1-5 less than the foraging stock thickness is adopted, wherein the convex die is an original rigid-fixed convex die; the moving concave die is a dynamic compressive stress retractable concave die which is formed in such a way that an original concave die is correspondingly separated and guided to limit connection and then is in retractable connection with the volume spring fixedly arranged at the outer side; the volume spring realizes the rebound by compressing the volume of fluid and solid contained and sealed by a metal shell; and the U-shaped bolt composite bending die is obtained by adopting the structure of the convex die and the moving concave die as well as the application of the volume spring, therefore, the aim of controlling rebound bending by the spring is achieved by adopting one-step bending forming compounding with hardness and softness.

Provided is an online adjustable closing force gas lubricating mechanical sealing device. The online adjustable closing force gas lubricating mechanical sealing device comprises an axial moving ring positioning ring, a sealing end cover, a moving ring seat, a piston, a working spring, a piston limiting ring, a pushing ring, a static ring, a moving ring and a sealing cavity. The moving ring is fixed to the moving ring seat and rotates along with a shaft. The static ring is arranged on the sealing end cover. A piston cavity is arranged inside the sealing end cover. The sealing end cover is provided with an outer gas supplying channel, and the sealing end cover is communicated with one side of the piston cavity. The working spring is arranged between the other side of the piston and the static ring. The piston moves along the piston cavity in the axial direction to change the compression amount of the working spring. The other side of the piston is exposed inside the sealing cavity. The sealing cavity is communicated with a buffer gas channel. By adjusting the outer gas supplying pressure, the compression amount of the working spring can be adjusted, and therefore online adjusting on the sealing closing force can be achieved.

The invention mainly belongs to the field of aeronautical engineering, and particularly relates to a quick-disassembling energy absorption undercarriage for a multi-rotor unmanned aerial vehicle. The undercarriage comprises an undercarriage supporting rod, a fixing structure, a quick-disassembling structure and an energy absorption structure. An undercarriage body is fixed to an arm of the multi-rotor unmanned aerial vehicle. The fixing structure and one end of the undercarriage supporting rod are connected or disconnected through the quick-disassembling structure. The energy absorption structure is connected with the other end of the undercarriage supporting rod and comprises energy absorption springs, and conversion of kinetic energy to elastic potential energy can be achieved. The quick-disassembling energy absorption undercarriage is an important part of the multi-rotor unmanned aerial vehicle, is suitable for ground parking, taking-off and landing of the multi-rotor unmanned aerial vehicle and can bear the gravity of the multi-rotor unmanned aerial vehicle and consume and absorb impact and jolt energy during landing of the multi-rotor unmanned aerial vehicle.

The invention discloses a train run-through channel. The train run-through channel comprises a mounting frame assembly, a shed cloth assembly, a side guard plate assembly, a pedal assembly, a cab apron assembly and a top plate assembly; wherein the cab apron assembly comprises a cab apron and a link mechanism, the link mechanism is fixedly arranged on the cab apron, and the four corners of the cab apron are in folder structure with the corner tilted. The train run-through channel of the invention has simple structure, so that the train can be in better train operational environment while passing a curve with less radius and train operation effect is ensured.

The invention relates to an arc smooth compression interpolation algorithm for high-quality processing, and the method comprises the following steps: recognizing a continuous processing region; selecting data points in the continuous processing region, carrying out the fitting of the data points, and obtaining a secondary rational Bezier curve; recognizing arcs according to the curve, and carryingout the transformation of the geometric forms of the arcs; merging the adjacent arcs which belong to the same circle, and obtaining an interpolation curve; and carrying out the arc interpolation on the interpolation curve. The algorithm is high in processing precision and processing efficiency. The method employs the arcs in the geometric forms for interpolation, can precisely calculate the interpolation parameters corresponding to the arc length, reduces the calculation complexity and the frequent fluctuation of speed during processing, and improves the processing quality and efficiency.

The invention provides a diaphragm valve body of a flow control valve, and solves the problem of unstable flow regulation caused by vibration and separation of a valve plate portion of the diaphragm from a keeper, thereby steadily conducting flow regulation. The diaphragm valve body (38) of the flow control valve comprises a diaphragm (42) provided with a valve plate portion of a radial central portion arranged opposite to a valve seat (44), an annular fixing portion (115) of an outer portion, and a flexible film portion (116); the keeper (40) keeping the valve plate portion (112). The diaphragm valve body of the flow control valve can change water flow of a water channel (36) according to a fractional dose between the valve plate portion (112) and the valve seat (44); the valve plate portion (112) and the flexible film portion (116) of the diaphragm (42) are arranged in a method of split parts; the valve plate portion (112) is bonded and fixed on the keeper (40); on the other hand, the keeper (40) is employed to clamp an inner portion (116B) of the flexible film portion (116), so the flexible film portion (116) can be fixed on the keeper (40).

The invention belongs to the technical field of vibration and noise reduction of rail transit, in particular to a steel spring vibration isolator which can provide nonlinear elastic bearing capacity.The invention solves the problems of poor vibration control effect and low leveling construction efficiency of the floating ballast bed system under the condition of varying dynamic load. At least oneof that static load support spr and the combined support spring respectively comprises a helical steel spring, A static load bearing spring and a combined bearing spring are arranged in parallel or the combined bearing spring is sleeved outside the static load bearing spring, and the static bearing spring supports the upper shell, at least a part of the combined bearing spring is provided with asolid damping structure, or the lower shell is provided with a damping material, and the combined bearing spring is at least partially arranged in the damping material; The invention has the advantages of simple structure, strong adaptability to dynamic load change and good vibration isolation performance, and can be widely applied to complex vibration isolation engineering where dynamic load is easy to change.

The present invention discloses a flexible display and a formation method thereof, and relates to the display technology field. The flexible display comprises a first flexible substrate; a film transistor comprising an active layer located at the first side of the first flexible substrate; and a plurality of second flexible substrates located between the active layer and the first flexible substrate. The active layer comprises a channel region, the orthographic projections of the second flexible substrates at a plane where the first flexible substrate is located at least cover the orthographic projection of the channel region at the plane where the first flexible substrate is located; and the coefficient of thermal expansion of the first flexible substrate is smaller than the coefficient of thermal expansion of the second flexible substrates. The lower portion of the active layer of the film transistor is overlapped and provided with the second flexible substrates and the first flexible substrate in order, and the coefficient of thermal expansion of the first flexible substrate is smaller than the coefficient of thermal expansion of the second flexible substrates to allow the film transistor in a flexible display to have a certain compression in the no-bending state so as to be equal to improvement of the tensile capacity of the device and facilitate improving the anti-bending capacity of the flexible display.

The invention relates to the technical field of the high-voltage device, and discloses a DC breaker based on a dual-coil monostable permanent magnet mechanism. The DC breaker comprises a vacuum arc-extinguishing chamber; a static contact and a movable contact are arranged in the vacuum arc-extinguishing chamber from top to bottom, the bottom surface of the movable contact is connected with a movable conducting rod; the movable conducting rod is connected with a dual-coil repulsion mechanism through a spring steering mechanism, the dual-coil repulsion mechanism is connected with a permanent magnet mechanism through a switch-off maintaining spring, and a switch-off buffer is arranged below the permanent magnet mechanism; the switch-off maintaining spring is used for providing the switch-offmaintaining force, the permanent magnet mechanism is used for providing a switch-on maintaining force, the spring steering mechanism is used for providing the switch-on assisting force in the switch-on, thereby increasing the contact pressure of the movable contact and the static contact; the dual-coil repulsion mechanism is used for providing the starting acting force of the switch-off and the starting acting force of the switch-on through the electromagnetic induction; and the switch-off buffer is used for absorbing excessive kinetic energy in the switch-off process. The DC breaker disclosedby the invention is simple and reliable, convenient for application, and has good in market promotional value.

The invention relates to a connection pipe structure of an aluminum-plastic pipe, in particular to a sliding-compact-type pipe fitting for an aluminum-plastic pipe. The sliding-compact-type pipe fitting for the aluminum-plastic pipe comprises a pipe fitting body provided with at least an end inner support and a sliding-tight clamping sleeve which is in a ring-shaped structure and matched with the pipe inner support, wherein more than two protruding ribs are arranged on the external diameter of the pipe inner support. A ring-shaped structure matched with the pipe inner support is sleeved in a sliding-compact and clamping mode. At, a ring-shaped sealing ring is arranged on the external diameter of the pipe inner support of the pipe fitting main body and located among the protruding ribs. A chamfer is arranged in an end port of the inner diameter of one end where the sliding-tight clamping sleeve slides in. The sliding-tight clamping sleeve is arranged and then fixed on a cold expansion port part where the aluminum-plastic pipe passes. The sealing ring is contacted with the inner wall of the aluminum-plastic pipe. Compared with an existing pipe fitting, the sliding-compact-type pipe fitting for the aluminum-plastic pipe applies a sealing ring technology, the defect that the aluminum-plastic pipe is not good in memory in sliding-compact pipe fitting installation is remedied, amount of compression in the structure is increased, sealing performance is strengthened, and requirement of size is widened.

The invention relates to a mine explosion-proof pressure-resistant door which comprises a door frame and a door leaf, wherein the door leaf is arranged in the door frame; reinforcing rib plates are longitudinally and transversely arranged on the door leaf; sealing strips are arranged around the door leaf; a hand wheel mechanism is arranged on the door leaf; and the structure of the hand wheel mechanism is as follows: a mounting hole is formed on the door leaf; a copper sleeve is arranged on the mounting hole; a shaft sleeve is arranged on the periphery at the two ends of the copper sleeve respectively; the shaft sleeves are connected with the door leaf; a rotation shaft is sleeved in the shaft sleeve; and a pinion and a hand wheel are mounted on the rotation shaft respectively. The mine explosion-proof pressure-resistant door provided by the invention has reasonable structure and reliable performance, realizes various functions through a locking mechanism, a connecting rod mechanism and a hand wheel mechanism independently, and greatly improves the working efficiency, reliability and safety degree so that a cabin door can be started and closed in the shortest time when a safety accident happens to a coal mine.

The invention relates to a static directional hydraulic rotary steering tool which is formed by three parts: a turbine motor assembly, a guide mechanism and a torque transmission mechanism. The staticdirectional hydraulic rotary steering tool has the technical scheme that six high-temperature-resistant pressure-resistant pistons are uniformly distributed on the circumference; during control, thethree connected pistons push oil liquid, and the three opposite pistons pull the oil liquid, so that a spindle is deviated toward one direction under the actions of the pistons, and a lower drill bitcan accurately guide under the control so as to drill toward a target position; nine rows of pistons are arranged in the radial direction, and 54 pistons are arranged in total, so that a sufficient force is provided for deviating the spindle; when the pistons reach to the limiting position, a horizontal included angle formed between a deflection point and a deflection center is 1.16 degrees; in order to ensure the stable operation of the pistons, six direct-current servo motors are uniformly distributed on the upper parts of the pistons at 60-degree angles, and a plum coupling device is connected under each servo motor; and a screw rod is connected under each coupling device, so that the rotation movement produced by the servo motors is changed into the radial movement through the screw rods.

The present invention relates to a metal tube ring moulded gasket seal. It includes ring-shaped metal tube and flexible seal filling material filled into the interior of said metal tube. The upper and lower surfaces of said metal tube are respectively covered with cladding layer, and said metal tube is fastened between limited inner ring and limited outer ring. Its manufacture method includes the following steps: (1), filling the flexible seal filling material into the internal cavity of metal tube; (2), bending and making the metal tube into the form of ring; (3), butt-welding two end noses of said ring metal tube to form seal ring; (4), moulding and making the metal tube be fastened between the limited inner ring and limited outer ring; and (5), respectively covering the upper and lower surfaces of said metal tube with cladding layer.

The invention discloses an earplug matched with the ear in shape and relates to the technical field of acoustic products in contact with the ear. The earplug matched with the ear in shape comprises an earplug front-cavity shell and an earplug rear-cavity shell, wherein the earplug front-cavity shell and the earplug rear-cavity shell are combined together. A trumpet single body is contained in a space defined by the earplug front-cavity shell and the earplug rear-cavity shell. A sound outlet is formed in the earplug front-cavity shell. An ear coupler covers the outer portion of the earplug front-cavity shell. A through hole used for communicating the sound outlet and the outside environment of the earplug is formed in the ear coupler. The ear coupler is made of foam or soft silica gel or a memory sponge. The earplug matched with the ear in shape solves the technical problems that an in-ear type earplug is not matched with the ear and not comfortable in wearing in the prior art. The shape of the earplug matched with that of the ear can change along with the shape of the ear, so that a user does not feel uncomfortable or painful when the earplug is worn by a user for a long time.

The invention discloses a suspended type monorail transit track beam, belongs to the technical field of rail traffic and aims at providing the suspended type monorail transit track beam. By improvingthe vibration absorbing performance of the suspended type monorail transit track beam, the train running comfort is improved. The suspended type monorail transit track beam comprises a track beam topplate, track beam web plates and track beam bottom plates, wherein the track beam web plates are arranged on the left and right sides of the track beam top plate, and the track beam bottom plates arearranged on the internal side walls of the track beam web plates; vibration absorbing rubber pads are arranged on the track beam bottom plates; running rails are arranged on the vibration absorbing rubber pads; and the running rails are connected to the track beam bottom plates through fastener systems. The suspended type monorail transit track beam is applicable to the suspended type monorail transit track beams.

The invention relates to the field of workpiece clamping devices, and discloses a fixture special for gearbox shell machining. The fixture comprises a numerical control rotary table, an oil pressure tailstock and a bridge plate which is provided with positioning columns; the positioning columns are fixed to the bridge plate and are hollow; a screw is fixed to each positioning column and is in threaded connection with a lock nut; four slide grooves are distributed in the middles of the positioning columns correspondingly; a slide block is slidably connected into each slide groove; a deflector rod is arranged in each positioning column, and a first connection ball is fixed to the middle of the deflector rod; a compression spring is connected between each slide block and the corresponding deflector rod, an amplification rod is hinged to the end, away from the slide block, of the deflector rod and is longer than the deflector rod, a second connection ball is fixed to the amplification rod,and the corresponding first connection ball and the second connection ball are both in spherical hinge with the inner wall of the corresponding positioning column; and a U-shaped tunnel is formed inthe bridge plate, one end of the U-shaped tunnel communicates with the positioning columns, the other end of the U-shaped tunnel penetrates through the bridge plate, and reflecting mirrors are installed at corners of the U-shaped tunnel. The invention aims to provide the special fixture capable of ensuring the clamping precision of a gearbox shell.

The invention relates to the technical field of continuous casting, in particular to a control method of transverse corner cracks of a casting blank of a chamfering crystallizer. The control method includes the steps that the spraying angle of spray nozzles on a first foot roll, a second foot roll, a third foot roll and a fourth foot roll relative to the casting blank is controlled to range from 95 degrees to 110 degrees; and the water flow of primary cooling water of the narrow face of the chamfering crystallizer is controlled to range from 520 L / min to 600 L / min. According to the control method of the transverse corner cracks of the casting blank of the chamfering crystallizer, the spraying angles of the spray nozzles on the first foot roll, the second foot roll, the third foot roll and the fourth foot roll relative to the casting blank are controlled to range from 95 degrees to 110 degrees, the cooling effect of the chamfering portion of the casting blank of the chamfering crystallizer for microalloyed steel can be fully guaranteed, and meanwhile the influence on the following process of the casting blank is avoided; and in addition, the water flow of the primary cooling water of the narrow face of the chamfering crystallizer is controlled to range from 520 L / min to 600 L / min, and the transverse corner cracks can be prevented from being generated on the casting blank of the chamfering crystallizer for the microalloyed steel.

A pipe connecting device of the type using an inner ring is provided which, through further review of the structure, has been improved so as to allow more repeated use than conventionally possible even while maintaining good seal performance. This pipe connecting device is provided with: an inner ring (3) which has an inner ring (3) comprising an inner peripheral part (3w) and an outer peripheral part (3G) which has a tapered outer peripheral expanded surface (3a) which is press-fitted into and expands the end (4C) of a tube (4); a pipe fitting main body (1) which has a cylindrical screw part (1A) with a male screw (7) attached; and a union nut (2) having a female screw (13) that screws onto the male screw (7). The inner ring (3) provided with the tube (4) is inserted into the cylindrical screw part (1A), and the tapered outer peripheral expanded surface (3a) is pressed by a pressing portion (12b) of the union nut (2) with the tube (4) interposed therebetween, wherein the pressing portion (12b) of the union nut (2) that presses the tube (4) between the tapered outer peripheral expanded surface (3a) is formed as an inclined inner peripheral surface which, relative to the axis (Y) of the cylindrical screw part (1A), is inclined in the same direction as the tapered outer peripheral expanded surface (3a).

The invention discloses a low-temperature-resistant air spring upper seam allowance sealing structure. The sealing structure comprises an upper cover plate, a buckle ring, a connecting bolt and an upper seam allowance; the upper seam allowance is compressed between the upper cover plate and the buckle ring, the buckle ring and the connecting bolt are arranged on the radial outer side of the upperseam allowance, a bag body below the upper seam allowance is attached to the inner wall of the buckle ring and is attached to the bottom surface of the buckle ring downwards; a sealing structure formed by radial sealing and axial seal which are arranged alternately and connected in sequence is adopted between the upper cover plate and the upper seam allowance and between the upper seam allowance and the buckle ring, the sealing pressure of at least one axial sealing surface of the upper seam allowance to the upper cover plate faces the inner direction which is away from the connecting bolt, and the sealing pressure and the compression amount of the upper seam allowance are increased along with the loading and the displacement of the air spring. The sealing reliability of the upper seam allowance of the air spring in the loading process is guaranteed, effective sealing of the upper seam allowance in a low-temperature state is realized, and the sealing requirement of the air spring underthe low-temperature state is met. The invention further provides a low-temperature-resistant air spring upper seam allowance sealing method and a low-temperature-resistant air spring.

The invention relates to a device for automatically detecting the thickness of a workpiece, which is used for automatically detecting the thickness or height of the workpiece with a plane surface and belongs to the technical field of mechanical processing. The device comprises a rack and is characterized in that the rack is provided with a presser foot for fixing the workpiece in detection and a measuring piece with a plane measuring surface, the presser foot and the measuring piece are elastically installed on the rack and can slide up and down under the action of a first power device, and the measuring piece is provided with a sensor capable of detecting the vertical displacement of the measuring piece. The device provided by the invention is reasonable and skillful in design and simple in structure, can realize automatic detection of the thickness of the workpiece, is high in accuracy and good in effect, can be suitable for workpieces of different specifications, is wide in range of application, lowers the labor cost, increases the production efficiency, and has favorable market prospects.

The invention discloses display equipment and a Bluetooth audio transmission method. The display equipment comprises a Bluetooth module and a controller, wherein the Bluetooth module comprises a plurality of links, and each link can serve as a target link and is configured to be used for transmitting audio data to Bluetooth audio equipment; the controller is used for being in communication connection with the Bluetooth module; the controller is configured to monitor the transmission condition of audio data on each target link, and increase the compression amount of the audio data on the firsttarget link if the transmission efficiency of the audio data on the first target link is low; and the first target link is any one of the target links. The display equipment and the Bluetooth audio transmission method provided by the invention monitor each target link used for transmitting the audio data to the Bluetooth audio device, and increase the compression amount of the audio data on the target link if the transmission efficiency in any target link is low, thereby ensuring that ensuring that the target link normally transmits the data, and further ensuring that a plurality sets of audioequipment connected with the display equipment at the same time normally play audios.

The invention discloses a twin-screw compression straw baler, and belongs to the field of agricultural machinery. The problems of complex structure and heavy weight of a baler in the prior art are solved. According to the technical scheme, the twin-screw compression straw baler mainly comprises a twin-screw straw compressor, a baling device and a driving device, wherein the twin-screw straw compressor comprises a charging barrel, a first helical blade and a second helical blade; the charging barrel is provided with a feed inlet; the first and second helical blades are arranged abreast in the charging barrel; the charging barrel is communicated with the baling device, and is used for delivering straws to the baling device through the first and second helical blades; the first and second helical blades are driven by the driving device; the helical directions of the first and second helical blades are opposite; the rotating directions of the first and second helical blades are opposite and back to the feed inlet. The twin-screw compression straw baler is mainly used for compressing and baling the straws.

The invention discloses a high-compressibility and high-resilience sealing assembly. The high-compressibility and high-resilience sealing assembly comprises a metal ring, wherein sealing structures for sealing connection are arranged on the two axial end surfaces of the metal ring, an annular groove with an opening is formed in the peripheral part of the inner side and / or the peripheral part of the outer side of the metal ring, the annular ring is provided with an open end and a closed end, an elastic supporting piece is fixedly arranged at the open end of the annular groove, the elastic supporting piece is supported between the upper side wall and the lower side wall of the open end along the axial direction of the metal ring in a retractable way, the open end is in liquid flow communication with the closed end through the elastic supporting piece, and the sealing structures are located on the two sides of the axial direction of the open end on the metal ring. The sealing assembly has the features of large compression amount and large resilience amount; when the sealing assembly is subjected to frequent compression and resilience during sealing connection, good rigidity can be kept, effective sealing load can be provided at the positions of the sealing structures, and the sealing connection positions are always guaranteed to be in an effective sealing state.

The invention discloses a non-contact rocker sensor, a control device and a processing system and method, and relates to the technical field of novel sensors. The non-contact rocker sensor comprises a rocker assembly and a magnetic induction IC assembly. The rocker assembly is used for generating swing in a first direction and a second direction which are perpendicular to each other, swing of a first magnetic field generated by a first magnet swinging in the first direction and swing of a second magnetic field generated by a second magnet swinging in the second direction. The magnetic induction IC assembly is used for generating and outputting a first electric signal corresponding to the change of the distance between the first magnet and the first magnetic induction element caused by the swing of the first magnet and a second electric signal corresponding to the change of the distance between the second magnet and the second magnetic induction element caused by the swing of the second magnet. The non-contact rocker sensor has the advantages of long service life, high control precision and small size.

The invention relates to a self-propelled robot for evaluating the quality of an inner coating of a pipeline. The self-propelled robot comprises a detection system, a control system, a power system, abattery box, a power box, a wireless communication box, a ground wire connecting module and a step counting module, the power system is provided with a mounting base; the detection system is arrangedat the front end of the mounting base; the control system and the battery box are arranged above the power system; the step counting module is arranged on a front end plate of the mounting base; thepower box is arranged on a rear end plate of the mounting base; the wireless communication box and the ground wire connection module are arranged on the power box. Pure electric control is adopted, the structure and control elements are greatly simplified, the overall size is reduced, and the technical problems that in the prior art, a robot in a pipeline is low in integration level, too long in overall size, high in construction and transportation difficulty, high in failure rate, inaccurate in detection result and the like are solved.

The invention discloses a cylinder, a compression mechanism, a rotary compressor and a heat pump device. A compression cavity for rolling fit of a roller is defined in the cylinder, a sliding sheet groove and a first air suction port, both facing an opening of the compression cavity are formed in the circumferential wall of the cylinder, a piston cavity is defined in the circumferential wall of the cylinder, and the piston cavity is provided with a communication port formed in the inner circumferential surface of the compression cavity. According to the cylinder, the air discharge amount increasing mode of the cylinder can reduce the number of parts of the compressor, reduce the size and the weight, and greatly reduce the cost.

The invention provides a hydraulic leveling base and a washing machine. The hydraulic leveling base comprises supports which can be combined and connected or used independently, as well as leveling bottom legs disposed under the supports, wherein the upper part of each support is a supporting face used for bearing; and each leveling bottom leg is filled with a hydraulic medium, and the hydraulic medium can flow inside the leveling bottom leg and / or flow between the leveling bottom legs, so automatic leveling can be achieved. According to the invention, the leveling bottom legs are disposed onthe lower parts of the support of the hydraulic leveling base, and the hydraulic medium can flow inside the leveling bottom legs and / or flow between the leveling bottom legs, so the compression amounts of the leveling bottom legs are big under bearing of huge pressure; and the leveling bottom legs bearing small pressure can be lengthened under hydraulic effects, so automatic height leveling can beachieved. The hydraulic leveling base provided by the invention is characterized in that the leveling bottom legs can be adjusted effectively in time according to actual use environments based on hydraulic principles; adjustment effects are better; and applicability is high.

The invention belongs to the technical field of billboard, in particular to a taxi billboard, the taxi billboard comprises a base, a triangular billboard, an adjusting mechanism and a wind energy mechanism, wherein the triangular billboard can stop rotating and switching when the taxi is traveling at high speed and intermittently rotating and switching when the taxi is traveling at low speed, so that the triangular billboard can effectively propagate three advertisements and greatly increases the advertisement benefit; and the triangular billboard comprises a base, a triangular billboard, an adjusting mechanism and a wind energy mechanism. In addition, the driver may push the pushed ring by rotating the adjustment ring, so as to increase the compression amount of the first spring, so thatthe time of the first rotating shaft passing through the scroll spring, the driving cylinder and the triangular lever successively crossing the limit block is longer and longer, and the frequency of the driving cylinder driving the triangular billboard to rotate and switch is slower, so as to satisfy the propaganda effect of the triangular billboard under different conditions. The invention has the advantages of simple structure and good use effect.

The present invention relates to flyer technology, and is especially one kind of flyer with air compressor as driving mechanism. The technological scheme is that the flyer includes mainly floating board and main body. The floating board is fixed onto the main shaft, the main shaft passes through the compressing cylinder inside the main body and extends beyond the main body, and the piston of the cylinder is fixed onto the main shaft. The main body is provided with several air compressors with different compression amount and communicated each other, engine to drive the air compressors, compressed air storage and air jet communicated to the compressed air storage. The present invention is powered by compressed air, rather than aviation fuel oil, and has greatly lowered weight and no hidden safety trouble of carrying great amount aviation fuel oil.