46results about How to "Effective shock absorption" patented technology

According to the semiconductor product processing equipment and the mist discharging system, the mist discharging fan is connected with the rack through the damping mechanism, vibration of the mist discharging fan can be effectively prevented from being transmitted to the rack, the machining precision can be improved, the damping mechanism can adopt different structures according to needs, and when a connector is adopted, the connector is connected with the mist discharging fan through the damping mechanism. The connector is connected to the top of the first supporting rod through the first damping connecting base and connected to the bottom of the second supporting rod of the rack through the second damping connecting base, the second supporting rod can effectively limit the connector, and the problem that the connector topples due to the fact that the mist discharging fan is arranged on the first side of the connector is solved; shear force borne by bolts for connecting the first and second damping connecting seats with the first and second supporting rods is reduced, and the structural stability and safety of the damping structure are effectively guaranteed. When the bracket is adopted, the structure is simple, and a two-stage damping structure is adopted, so that the vibration of the fog exhaust fan can be isolated from the rack to the greatest extent, and the influence on the main shaft is avoided.

This utility model discloses a feeding device with an anti-clogging mechanism for organic fertilizer production, including a crushing mechanism, a pneumatic anti-clogging component, and a feeding pipe. The upper end of the crushing mechanism is connected to the organic fertilizer production equipment, and the lower end of the crushing mechanism is connected to the feeding pipe. The feeding pipe consists of an upper pipe section, a middle tapering pipe, and a lower pipe section. A pneumatic anti-clogging component is installed on the outer wall of the middle tapering pipe, and a vibrator is fixedly connected to the outer wall of the feeding pipe below the pneumatic anti-clogging component. The purpose of this utility model is to provide a feeding device with a synergistic anti-clogging function, which significantly improves the smoothness and stability of feeding.

The invention relates to the technical field of measurement, in particular to a wheel type distance measuring device for road and bridge segmented construction and a distance measuring method thereof.The wheel type distance measuring device comprises a wheel, a handle and a counter, the counter is fixed to the handle, and the wheel is connected with the handle through an elastic assembly; the elastic assembly can adaptively adjust the distance between the wheel and the counter under the condition of an uneven road surface, the wheel and the counter are matched through the transmission assembly, and the transmission assembly can drive the counter to operate in the process that the wheel rotates and the elastic assembly stretches out and draws back; the brush is matched with the cleaning assembly, when the wheel rotates, the cleaning assembly drives the brush to brush the outer wall of the wheel in a reciprocating mode, the device is compact in overall structure and convenient and fast to operate, and the elastic buffering function, the stable transmission function and the automatic cleaning function are organically integrated; and the environmental adaptability and the working reliability of the wheel type distance measuring device in a road and bridge segmented construction scene are improved.

The utility model discloses a low -noisy rear wheel cover assembly, including wheel cover main part, flexible connecting piece and shock attenuation subassembly. The wheel cover main part surface is equipped with a plurality of locating block for installing flexible connecting piece, and flexible connecting piece includes the screw bushing pipe and the ring seat fixed in the inboard of locating block, and the inboard of ring seat is equipped with a plurality of lug and screw bushing pipe fixed connection, realizes flexible support and radial limit. Shock attenuation subassembly includes the pasting box, props foot and the vibration piece fixed in the end of props foot, and the vibration piece is fixed in the inboard of pasting box through props foot, and can set up different size and slot structure to realize the multi -frequency vibration stop. This structure can effectively absorb the multi -frequency vibration in the vehicle driving process, reduces the wheel cover resonance noise, and promotes the stability and the comfort of whole car driving.

The utility model belongs to the technical field of virtual reality game equipment, and particularly relates to a game experience freedom degree platform structure which comprises a freedom degree platform, an airship model body is arranged on the top of the freedom degree platform, and an airship model head is arranged on the left side of the airship model body. The buffering assembly is arranged between the degree-of-freedom platform and the airship model body, a double-damping system is formed through the first buffering mechanism and the second buffering mechanism, vibration and impact in the movement process are effectively absorbed, the front-back position of the head of the airship model can be accurately controlled through the adjusting assembly, and the stability of the airship model is improved. In addition, LED lamps arranged in air nozzles of the airship model work cooperatively with loudspeakers on the front side and the rear side, scene elements such as engine roaring and environment sound effects are simulated through light, shadow and stereo sound effects, the environment substitution sense is enhanced, and the effect of the airship model is improved. The method is suitable for diversified virtual scene requirements.

The utility model discloses a 12v internal combustion engine starting power supply convenient to use, which comprises a lower shell, the upper end of the lower shell is movably connected with an upper shell, a circuit board is movably connected in the lower shell, the side surfaces of the lower shell and the upper shell are provided with first external connection grooves, and the other sides of the lower shell and the upper shell are provided with second external connection grooves. A plurality of lower threaded sleeves are fixedly connected to the lower shell in a penetrating mode, a plurality of upper threaded sleeves are fixedly connected to the upper shell, symmetrical first clamping buckles are fixedly connected to the interior of the lower shell, symmetrical positioning holes are movably connected to the interior of the lower shell, and first friction strips are fixedly connected to the side face of the lower shell. A plurality of positioning plates are fixedly connected into the lower shell, a plurality of second soft cushions are movably connected into the lower shell, and symmetrical clamping sleeves are fixedly connected into the upper shell. Through the above structure, the stability of the circuit board is enhanced, the reliability of the product is improved, the circuit board is ensured to be stably fixed in the shell, and the durability of the product is improved.

The utility model discloses a PCBA (Printed Circuit Board Assembly) test fixture in the technical field of PCBA test, and aims to solve the problems of insufficient positioning accuracy, poor adaptability, insufficient clamping stability, damage to the surface of a PCB (Printed Circuit Board) and the like in the prior art. The jig comprises a jig body, a pressing and fixing mechanism and a clamping and fixing mechanism. The top side of the tool body is provided with a test groove used for placing a PCBA. The hold-down fixing mechanism effectively absorbs vibration and impact through the combined design of an electric push rod and a hold-down air cushion in combination with a spring and a shock absorber, and it is ensured that the PCBA is kept stable in the testing process; according to the clamping and fixing mechanism, a bidirectional threaded rod is matched with a servo motor, accurate movement of a clamping rod is achieved, PCBs of different sizes and shapes are rapidly adapted, and the positioning accuracy and adaptability are improved. By optimizing the clamping and positioning structure and the damping design, the performance of the PCBA test fixture is remarkably improved, and the PCBA test fixture has the advantages of high-precision positioning, high adaptability, stable clamping, PCB protection, convenience in operation and the like.

This invention relates to the field of mechanical fastener technology and discloses a heterogeneous material connection and fastening structure, including a connecting bolt. One end of the connecting bolt penetrates a stamped sheet metal housing, and a fastening nut is connected to the end of the connecting bolt penetrating the stamped sheet metal housing. An installation hole is provided on the outer surface of the stamped sheet metal housing. A connecting rubber sleeve is engaged with the outer surface of one end of the connecting bolt, and the end of the connecting bolt with the connecting rubber sleeve penetrates a plastic bracket. A stamped sheet metal part is disposed between the plastic bracket and the stamped sheet metal housing. This heterogeneous material connection and fastening structure, by using a connecting rubber sleeve with a specific groove design and tightly fitting it between the smooth shaft of the connecting bolt and the plastic bracket, effectively absorbs vibration and impact energy from all directions. During assembly, the rubber sleeve, through its elastic deformation and restoring force, avoids stress concentration caused by hard contact, thus extending the service life of the plastic bracket and the connection structure.

This utility model discloses a telescopic compensation type layered water injection sealing device, which includes a rubber sleeve and a spring. The upper and lower rubber sleeves, installed outside the upper and lower water injection pipes respectively, have hydraulic chambers one and two connected by a connecting hose. A pressure transmission hole in the upper water injection pipe, connected to hydraulic chamber one, is connected to a hydraulic pump on the ground via a hydraulic pipeline. The upper and lower water injection pipes are connected by a telescopic compensation mechanism. The spring is installed between the sealing cylinder and the telescopic sleeve in the telescopic compensation mechanism. The upper water injection pipe, sealing cylinder, corrugated pipe, sealing sleeve, and a fixing ring installed outside the lower water injection pipe and below the telescopic sleeve are sequentially fixedly connected. The lower water injection pipe can move up and down within the telescopic sleeve and the fixing ring. The telescopic compensation mechanism absorbs vibration energy generated during water injection and compensates for sealing gaps. This device is suitable for high-efficiency layered water injection tubing in oilfield development, providing vibration and creep prevention effects.

This utility model discloses a motorhome chassis frame, belonging to the field of motorhome manufacturing technology. The utility model includes a chassis frame, spring shock absorbers, and a row of reinforcing ribs. The two ends of the row of reinforcing ribs are respectively connected to the interior of both sides of the chassis frame. Mounting plates are provided at both the front and rear ends of the chassis frame. Rectangular grooves are formed within the mounting plates, and support seats fit within these grooves. The support seats have openings within them. The two ends of the spring shock absorbers are respectively connected to the rectangular grooves and the tops of the support seats. This utility model, through the sliding cooperation structure of the slider and the groove, combined with the elastic support of the spring shock absorbers, allows the support seats to adaptively adjust in the vertical direction, effectively absorbing vibration and impact energy during vehicle operation. When the wheels encounter bumps, the support seats drive the slider to slide up and down within the groove, causing the spring shock absorbers to compress or extend, converting the impact force into elastic potential energy and releasing it slowly. This significantly reduces the vibration intensity transmitted to the frame and extends the service life of the chassis frame.

The utility model discloses a modularization aviation part packing structure, including the outer packing box, the outer packing box inside evenly is equipped with a plurality of inner packing box, the inner packing box is placed by layer from top to bottom to the middle part of inner side of outer packing box is equipped with a plurality of limit post, and the limit post will transverse inner packing box be limited and divide, the inner packing box top opening is equipped with the box cover, the inner packing box bottom all is connected with a plurality of damping shock absorber, the outer packing box top opening installs the box cover, and the box cover and outer packing box are linked through the connecting screw rod. The utility model discloses a plurality of inner packing boxes are arranged in the outer packing box, and the inner packing box can store parts separately, and the inner packing box is internally provided with shock attenuation sponge, and the parts in the inner packing box can be effectively damped and buffered through the shock attenuation sponge, and the inner packing box bottom all is equipped with the damping shock absorber, and the damping shock absorber can effectively buffer the vibration received by the inner packing box.

The utility model relates to the field of medical instruments and equipment, in particular to a special moving device for a vertebral brittle fracture patient, which comprises a bed frame and a bed board, the bed frame is an assembly carrier of the moving device, the bed frame is a frame body with a slot in the middle, the bed board is assembled at the slot of the bed frame, and the bed board is arranged on the bed frame. Universal wheels are rotationally mounted at four corners of the bottom surface of the bed frame, and a brake part is arranged in each universal wheel; the bed further comprises guide rods and the like, two rows of symmetrically distributed guide rods are fixedly connected to the bottom face of the bed board, a plurality of guide rods are arranged in each row at intervals, and the bed board penetrates through the bed frame in a sliding mode through the guide rods and is connected to the bed frame. The lumbar vertebra cushion is arranged, the position of the lumbar vertebra cushion can be adjusted through the sliding rails, necessary support and stability are provided for the lumbar vertebra of a patient, the requirements of different patients are met, the multiple sets of damping springs are arranged between the bed frame and the bed plate, the effective damping and buffering effects can be provided in the moving process, and discomfort or injury caused by vibration to the patient is reduced.

The invention relates to the technical field of lithium ion storage battery processing, and provides an anti-deviation conveying device for processing a lithium ion storage battery, the anti-deviation conveying device comprises a base, a conveying belt is mounted at the top end of the base, the conveying belt is connected with the output end of a driving motor through a transmission assembly, and guide plates are mounted at the two ends of the top of the conveying belt; a guide plate is arranged on the base, the guide plate is connected with an adjusting mechanism, vertical plates are installed at the two ends of the top of the base, a deviation rectifying mechanism is arranged on the vertical plates, and the deviation rectifying mechanism comprises a support installed on the vertical plates and a laser displacement sensor installed on the support. According to the lithium ion storage battery deviation correcting device, the laser displacement sensor is arranged, the position of a lithium ion storage battery is detected through the laser displacement sensor, information is transmitted to the single-chip microcomputer, during deviation, the single-chip microcomputer processes the information and transmits the information to the fixed motor, the fixed motor is started, the threaded rod rotates, and the movable frame drives the deviation correcting plate to move; and the aim of rectifying the deviation of the lithium ion storage battery is fulfilled.

This utility model discloses a special fixture for an ultrasonic fully automatic hot melt welding machine, including a base. A support platform is slidably mounted on the upper surface of the base. A first mounting plate is fixedly mounted on one side of the upper surface of the support platform, and a second mounting plate is fixedly mounted on the other side. A sleeve is fixedly mounted on the first mounting plate, and a telescopic rod is slidably mounted inside the sleeve. A cylinder is fixedly mounted on one side of the second mounting plate. Clamping components are fixedly mounted on both the output end of the cylinder and one end of the telescopic rod. A pressure plate is slidably mounted on the opposite side of the clamping components. Two symmetrically arranged S-shaped clamping plates are slidably mounted on the inner surface of the pressure plate. Through the clamping blocks, pressure plates, clamping plates, second spring, first spring, and telescopic rod, the workpiece can be vibration damped during welding, preventing vibration energy from being transmitted to adjacent components, causing resonance or energy loss, resulting in uneven welding pressure distribution. At the same time, it avoids micro-displacement caused by high-frequency vibration of thin-walled workpieces, greatly improving welding quality.

This invention discloses a mountain environment crane and its construction method, relating to the field of crane construction technology. The mountain environment crane includes a lower traveling body and an upper slewing body, with the slewing part of the upper slewing body rotatably connected to the slewing seat of the lower traveling body. The lower traveling body includes a track mechanism and a width adjustment mechanism. The width adjustment mechanism is mounted on the slewing seat, and the track mechanisms are symmetrically arranged on both sides of the slewing seat. The width adjustment mechanism is located between the paired track mechanisms, and its output end drives and connects to the track mechanisms. The width adjustment mechanism is used to adjust the distance between the paired track mechanisms. This mountain environment crane and its construction method enable the entire machine to travel on soft and rugged terrain by means of the track mechanism, and the width adjustment mechanism allows for flexible adjustment of the spacing between the paired track mechanisms, adapting to travel operations in narrow sections and improving the overall passability of the machine.

The invention discloses a multi-suspension-point anode clamp, relates to the technical field of electrolytic aluminum production auxiliary equipment, and aims to solve the problems of fixed clamping points, non-adjustable spacing and lack of buffer protection in the prior art. The technical scheme is that the multi-suspension-point anode clamp comprises a clamp frame, an adjusting unit and a clamping unit, the clamp frame is provided with the clamping unit through a mounting hole site, and the adjusting unit is arranged on the clamp frame; the clamp frame is provided with a plurality of groups of mounting hole sites, the clamp frame is further provided with adjusting units, the adjusting units correspond to the clamping units, and the distance between every two adjacent clamping units is adjusted to adapt to various working conditions; the clamping unit comprises a mounting plate, a clamping part and a driving part, the mounting plate corresponds to the mounting hole position in position and is connected with the adjusting unit, the driving part and the clamping part are mounted on the upper side and the lower side of the mounting plate respectively, the clamping part is driven by the driving part, a clamping plate is mounted at the bottom end of the clamping part, and the clamping plate is used for clamping the electrolytic aluminum anode; and a plurality of groups of mounting hole positions are formed in the clamp frame to mount the clamping units, so that a plurality of electrolytic aluminum anodes can be synchronously clamped, and the transfer efficiency is improved.

This utility model discloses a movable anti-corrosion mold steel, which includes a mold steel body. Multiple threaded holes are formed at the bottom of the mold steel body, and casters are inserted into the inner circumference of each threaded hole. A handling assembly is provided on the side wall of the mold steel body, including support arms. A protective assembly is also provided on the side wall of the mold steel body, including a buffer pad. Multiple threaded insertion holes are formed on the side wall of the mold steel body, and lifting rings are inserted into the inner circumference of each threaded insertion hole. This movable anti-corrosion mold steel features four hinged support arms at its four corners, which, when unfolded, provide stable gripping points, facilitating manual handling by workers. It is particularly suitable for working environments without lifting equipment. Furthermore, a protective structure integrating permanent magnets, a silicone buffer layer, and wear-resistant pads is added to the sides of the mold steel, effectively absorbing impacts and preventing edge wear, ensuring safety during transportation and storage.

The utility model relates to the field of welding alternate platform discloses a double position alternate platform of large -scale casting automatic welding house, including bearing frame, bearing frame rotatable setting in the upper of mounting base, the inner wall fixed with drive motor of mounting base, the output shaft one end of drive motor is fixed with the bottom surface of bearing frame, both ends of bearing frame all are fixed with the placing table, the left and right sides of placing table all are fixed with the pneumatic cylinder, the telescopic link one end of pneumatic cylinder extends to the placing table, the telescopic link one end of pneumatic cylinder is fixed with the clamping plate, two clamping plates between the setting have two fixed plates. In the utility model, through the cooperation of pneumatic cylinder, clamping plate, fixed plate, sleeve and connecting plate, the casting of different models can be clamped and fixed in multiple directions, the casting is kept in the center position of placing table, the accuracy of casting welding is guaranteed, and the offset of welding position in the welding vibration of casting is prevented.

The utility model relates to a composite structure anti-rotation steel wire rope for deep-sea exploration, which belongs to the technical field of steel wire ropes for deep-sea exploration and comprises a rope core layer, and a protective reinforcing structure is arranged on the outer wall of the rope core layer. The protective reinforcing structure comprises a steel wire layer pressed on the outer wall of the rope core layer, the outer wall of the steel wire layer is pressed with a composite structure layer, the outer wall of the composite structure layer is pressed with a buffer energy-absorbing layer, the outer wall of the buffer energy-absorbing layer is pressed with a reinforcing structure layer, and the outer wall of the reinforcing structure layer is pressed with a conductive shielding layer. And the outer wall of the conductive shielding layer is covered with a polymer coating protection layer in a pressing manner. According to the composite structure anti-rotation steel wire rope for deep sea exploration, according to the multi-layer composite structure design, the rope core layer provides a supporting and lubricating foundation, the steel wire layer bears main loads, the composite structure layer achieves the anti-rotation function, the buffering energy absorption layer effectively absorbs impact and vibration, and the reinforcing structure layer further improves the overall strength and stability; the conductive shielding layer inhibits electromagnetic interference.

This application discloses a servo turntable assembly for a center-driven vertical injection molding machine and the vertical injection molding machine itself, belonging to the field of intelligent manufacturing equipment. It includes a mold base, an upper mold-closing base, a lower mold-closing base, a turntable, a turntable servo assembly, a mold-closing linkage assembly, a mold-closing servo assembly, and a mold-closing fine-tuning assembly. This application has the effects of reducing injection molding machine energy consumption, reducing pollution, and improving mold-closing accuracy.

The utility model provides an installation mechanism of heat exchanger relates to heat exchanger technical field, including bottom plate and slide frame, the upper surface of bottom plate is connected with mounting plate, the upper surface of mounting plate is connected with support column, the upper surface of support column is connected with spring, the top end of spring is connected with shock absorption column, the shock absorption column is connected with the slide frame. And the upper surface of the damping column is connected with a damping plate. According to the mounting mechanism of the heat exchanger, a damping plate and a damping column shake through vibration generated by the heat exchanger body, so that a spring rebounds continuously, and meanwhile, when the damping plate and the damping column shake, a moving block is adjusted under cooperation of a first sliding groove and a first sliding block; and therefore, the adjusting plate drives the damping plate to vertically shake under the cooperation of the first pin shaft and the second pin shaft, the damping plate can be effectively damped, the situation that normal use of the heat exchanger body is affected due to breakage of internal pipes is avoided, the flexibility and stability of the device are improved, and the maintenance cost of the device is reduced.

This utility model relates to the field of rotary drilling bit technology and discloses a rotary drilling rig bit with a detachable helical blade reinforcement structure. This rotary drilling rig bit with a detachable helical blade reinforcement structure includes a drill bit body and helical blades. The outer side of the drill bit body has vertically equidistant helical grooves that are adapted to the helical blades. This device has advantages such as a detachable helical blade design, structural reinforcement, resolution of high-temperature welding issues, and stable material strength. It solves the problems of traditional rotary drilling bits where the outer helical blades are mostly integrally formed or welded to the drill bit body, requiring replacement of the entire drill bit after wear or breakage, making individual repair impossible. Furthermore, the welded area is prone to fatigue cracks due to impact loads, and the high welding temperature causes material grain coarsening, leading to a decrease in shear strength.

The utility model discloses an assembled four-rotor unmanned plane, including power subsystem and airborne platform subsystem, power subsystem includes propeller module and motor module, and propeller module is connected with motor module transmission, airborne platform subsystem includes structural board subassembly, and structural board subassembly includes upper layer center plate, lower layer center plate, battery lower plate and top plate, and there is the interval between upper layer center plate and lower layer center plate, airborne platform subsystem still includes machine arm subassembly, and machine arm subassembly includes a plurality of machine arms, and one end of machine arm is respectively with lower layer center plate and battery lower plate detachable connection, and the other end of machine arm is fixedly connected with motor module, the utility model discloses an assembled four-rotor unmanned plane, and its beneficial effect lies in, realizes the quick assembly and disassembly of complete machine structure, and promotes the portability and transportation efficiency, and is convenient for routine maintenance and component replacement.

The utility model discloses an anti-drop agricultural product production transfer device which comprises a moving trolley body, the lower surface of the moving trolley body is fixedly connected with a mounting plate, the lower surface of the mounting plate is rotatably connected with a rotating shaft, the lower surface of the rotating shaft is fixedly connected with a mounting seat, and moving wheels are mounted in the mounting seat. An extending plate is fixedly connected to the outer surface of the mounting base, a damper is fixedly connected to the upper surface of the extending plate, a spring is arranged on the damper, a sliding groove is formed in the moving trolley body, a sliding block is slidably connected into the sliding groove, and a scraping rod is fixedly connected to the outer surface of the sliding block. Impact caused by uneven road surfaces can be effectively absorbed, bumping of the trolley in the moving process is reduced, the stability and the damping effect are improved, shaking of agricultural products in the transportation process is reduced, the falling risk is reduced, and the safety of the products is protected.

The utility model relates to motor fittings technical field especially relates to a motor controller connector. Its technical scheme includes interface, one side of interface is provided with connecting structure, the connecting structure includes the connecting shell fixed in interface outer wall one side, the inner wall sliding connection of connecting shell has connecting sleeve rod, one end of connecting sleeve rod is fixedly connected with the wire port, the wire port corresponds with interface, and the other end of wire port is fixedly connected with inside telescopic sleeve, the outer wall of wire port fixed in telescopic sleeve one end is penetrated with connecting seat. The utility model discloses motor controller connector, it has strengthened the fixed between connector and equipment, effectively prevents the connection slack, has improved the stability and the reliability of connection's advantage, and has reduced the influence of external force to the connecting part, protects the interface and the wire port and other components, prolongs the service life of connector's function.

The utility model relates to the technical field of precast concrete, and discloses a precast concrete member loading and transporting fixing support which comprises a mounting plate and further comprises a mounting frame fixed to the bottom of the mounting plate, and a motor is arranged at the front end of the mounting frame. The two-way threaded rod is driven by the motor to achieve rapid adjustment of the clamping distance, components of different sizes can be adapted, the loading and transporting efficiency is remarkably improved, vibration and impact in the transporting process can be effectively absorbed through a unique spring buffering system, the component damage risk is greatly reduced, one-key type rapid disassembly and assembly are achieved through an innovative spring buckle mechanism, and the labor intensity of workers is lowered. Operation is easy, convenient and efficient, modular lightweight structural design is adopted on the whole, the self weight is reduced while the bearing strength is ensured, and the transportation cost is reduced. The support integrates the advantages of efficient adjustment, safety protection, convenient operation, flexible movement and the like, and the problems that a traditional fixing support is inconvenient to adjust, insufficient in protection, tedious in operation and the like are effectively solved.

The application relates to the piezoelectric technology field and discloses a piezoelectric actuating device. The piezoelectric actuating device comprises a seat body, a piezoelectric device and a buffer structure; the piezoelectric device comprises a fixed area and a free area connected along a first direction; along a second direction, the seat body, the buffer structure and the fixed area are sequentially fixedly connected, along the first direction, the free area protrudes from the seat body and the buffer structure, and the second direction intersects the first direction. Wherein, the hardness of the buffer structure is less than the hardness of the seat body, the buffer structure comprises a first buffer area and a second buffer area sequentially connected along the first direction, along the first direction, the first buffer area is farther away from the free area than the second buffer area, and the hardness of the first buffer area is greater than the hardness of the second buffer area. In this way, the stress concentration phenomenon of the piezoelectric actuating device can be reduced, the service life of the piezoelectric actuating device is prolonged, and the thrust generated by the piezoelectric actuating device is increased.

This utility model discloses a biomimetic noise reduction panel, comprising a sound-absorbing layer with a porous micro-nano structure disposed in the middle, and damping layers disposed on both sides of the sound-absorbing layer. Both damping layers are disposed on a mesh-like support plate. The edges of the support plate are encapsulated by four connecting blocks to form a square plate. The opposing connecting blocks on both sides form a set of connecting units. Two connecting blocks in a connecting unit are spliced ​​together by plug-in components to expand the size of the biomimetic noise reduction panel. The plug-in components are detachable. The sound-absorbing layer contains a porous micro-nano structure, structurally mimicking the scales of a lepidopteran insect wing. In terms of noise reduction performance, this noise reduction panel can stably cover a wide frequency range of 20Hz to 5kHz, with a noise reduction rate between 20.1% and 39.8%. Compared with the average noise reduction rate of 14.6% of traditional materials, its performance is improved by more than 50%, especially achieving a breakthrough in overcoming the industry challenge of low-frequency noise blocking.

The invention discloses remote control type automatic cleaning equipment for a large building glass curtain wall and a cleaning method, and relates to the technical field of curtain wall cleaning robots. Comprising a main body shell, a spiral power driving assembly is arranged on the peripheral side of the main body shell, a pressure spiral assembly is arranged at one end of the main body shell, and a coaxial reverse cleaning assembly is arranged at the end, away from the pressure spiral assembly, of the main body shell and used for cleaning and recycling waste liquid; the circulating water supply and suction assembly is connected with the coaxial reverse cleaning assembly through a pipeline; and the remote control electric control assembly is electrically connected with the spiral power driving assembly, the pressure spiral assembly, the coaxial reverse cleaning assembly and the circulating water supply and suction assembly. The device does not need to depend on a building preset structure, can be flexibly adapted to various high-rise building glass curtain walls, and has the characteristics of high safety, high cleaning efficiency, low use cost and environmental protection.

The utility model relates to tunnel construction technical field, concretely is a kind of assembled connecting passage connecting structure: including main tunnel connecting pipe piece, the bottom of one side of main tunnel connecting pipe piece is fixedly connected with reinforced concrete, the surface of reinforced concrete is installed with connecting passage end ring pipe piece, the surface of reinforced concrete is provided with damping mechanism, and the damping mechanism includes damping seat. The utility model when vibration occurs, end ring pipe piece is driven connection column by mounting plate, makes movable block in damping seat along the sliding of guide block inclined surface, reduces impact potential energy, first shock absorber is damped to connection column in damping seat, is acted on end ring pipe piece by mounting plate, second shock absorber is directly damped to reinforced concrete, and first buffer pad, bottom connection steel sheet and second buffer pad of end ring pipe piece end also play the role of buffering, improve the damping effect, reduce the risk of structural failure, guarantee the safety of tunnel.