50results about How to "Guaranteed adjustability" patented technology

The utility model provides transformer winding packaging equipment which comprises a base, a supporting framework is fixedly installed on the top of the base, a lifting assembly is installed in the supporting framework in a butt joint mode, an installation frame is installed at the lifting end of the lifting assembly in a butt joint mode, and a positioning assembly is fixedly installed on the installation frame. A hoisting assembly is fixedly installed at the top of the supporting framework, and a clamping assembly is installed at the hoisting end of the hoisting assembly in a butt joint mode. According to the utility model, the transformer shell can be positioned in a four-side synchronous movement manner, and the transformer shell can be synchronously folded and positioned without repeatedly correcting the assembly position when the transformer shell is placed; and the clamping state can be switched according to an actual operation object, internal and external clamping and fixing are achieved, and hoisting placement of a transformer winding and a shell is met.

The utility model relates to the technical field of engine accessories, in particular to an outboard engine carburetor which comprises a carburetor body and an adjusting screw, an air inlet channel and a fuel oil channel communicated with the air inlet channel are arranged in the carburetor body, and the fuel oil channel is communicated with an adjusting channel extending to the outside of the carburetor body. The adjusting screw comprises an adjusting section, a threaded section and a nut which are sequentially connected, an adjusting hole is communicated between the air inlet channel and the fuel oil channel, the air inlet channel and the fuel oil channel are blocked when the adjusting section is in sealing fit with the adjusting hole, and the adjusting screw is in threaded connection with the adjusting channel through the threaded section. A sleeve ring surrounding the periphery of the nut is arranged on the carburetor body corresponding to the outer edge of the adjusting channel in a protruding mode, and the nut is located in the sleeve ring when the adjusting screw is in threaded connection with the adjusting channel. The service life is prolonged.

The invention relates to a thermal management system and a vehicle, and relates to the technical field of vehicles. The thermal management system includes a compressor and first and second loops connected to an outlet of the compressor. The first loop comprises a first control valve and an external condenser, and the first control valve is connected with the compressor and the external condenser. The second loop comprises a second control valve and a built-in condenser, and the second control valve is connected with the compressor and the built-in condenser. The heat management system is configured to open the first control valve and close the second control valve under the condition that the current temperature is smaller than or equal to the first temperature threshold value and the heating working condition is started. And closing the first control valve and opening the second control valve under the condition that the compressor runs for a first duration threshold value and / or the exhaust pressure of the compressor is greater than or equal to the first pressure threshold value. The refrigerant adjusting device is used for adjusting refrigerants in a working loop.

The invention discloses an automatic powder strickling mechanism which comprises a strickling assembly, an automatic powder strickling assembly and a control assembly, and the strickling assembly comprises a pair of flanges which are connected to the free end of a motor and rotate along with a motor shaft of the motor; the blades are distributed between the pair of flanges in an array mode in the circumferential direction of the motor shaft and rotate in the circumferential direction of the motor shaft along with the flanges, and any blade at least has the state of abutting against the scraping plane when rotating along with the flanges; the driving assembly is connected with the slicking assembly and drives the slicking assembly to do reciprocating motion in the extending direction of the slicking plane; any blade is rotatably connected with the pair of flanges. The invention further claims to protect a using method of the automatic powder slicking mechanism. According to the device, the production efficiency can be remarkably improved, the labor cost can be reduced, standardization and consistency of powder slicking can be achieved through an accurate control mechanism, meanwhile, the requirements of an automatic production line are met, and the filter element preparation technology is promoted to advance towards higher-level intelligent manufacturing.

The utility model relates to the technical field of load-bearing base leveling, and discloses a load-bearing base leveling device which comprises a working table plate and a button, the button is arranged on the front side face of the working table plate, and a leveling device body is arranged at the bottom of the working table plate. The leveling device comprises a steel bearing table top, the steel bearing table top is arranged at the bottom of the working table plate, a tilt angle sensor is arranged in the steel bearing table top, and a servo electric cylinder is arranged on the inner wall of the steel bearing table top. The inclination angle value in the X direction is adjusted to be within 0.02 degrees by adjusting one servo electric cylinder, then the inclination angle value in the Y direction is adjusted to be 0.02 degrees by adjusting the other two servo electric cylinders, the adjusting steps are repeated till the inclination angle values of the inclination angle sensor in the 32X direction and the inclination angle sensor in the Y direction are both smaller than 0.02 degrees, and therefore the leveling effect is achieved. When the leveling device is used, it can be guaranteed that the working table of the machine is leveled, and the working efficiency of workers is improved.

The utility model discloses portable aviation seat slide rail foreign matter removing tool, including handle, the side surface of handle is equipped with the storage groove, and the rack is equipped in the storage groove and is penetrated, the one end of rack is located the one side fixed connection of handle and is provided with the cleaning head, and the bottom surface one side fixed mounting of cleaning head is provided with the light. The utility model, the operator holds the tool handle, and the light of cleaning head bottom is opened, and the slide rail area below aviation seat is illuminated, and it ensures that the operator can clearly observe the foreign matter and chippings in the slide rail, the cleaning brush is equipped with cleaning head bottom, can effectively remove small impurities, and its side surface is provided with magnet, is used for adsorbing the coin, key etc. iron foreign matter in the slide rail, and the hook structure can hang and take larger sundries, to realize comprehensive cleaning, the tool can efficiently remove all sorts of residual in the slide rail, avoids the problem of jamming caused by the accumulation of foreign matter, ensures the normal adjustment and long -term stable operation of aviation seat.

The utility model provides an expansion kettle and an automobile, and relates to the technical field of automobile heat management. The expansion kettle comprises a kettle body, a first partition structure and a second partition structure, the first partition structure is arranged in the kettle body and divides the inner space of the kettle body into at least two kettle cavities distributed in the first direction, and each kettle cavity is provided with a liquid supplementing opening; the second partition structure is arranged in the kettle cavity and divides the kettle cavity into a first cavity and a second cavity which are arranged in the second direction and communicated with each other, and the size of the first cavity is smaller than that of the second cavity. The first cavity bodies of the kettle cavities correspond to each other in the first direction, and every two adjacent first cavity bodies communicate with each other through a liquid passing opening formed in the first partition structure. The expansion kettle is applied to the automobile, the dry suction risk caused by exposure of a liquid supplementing opening in the expansion kettle when the automobile inclines leftwards and rightwards can be effectively reduced, and therefore stable operation of the automobile is guaranteed.

The utility model relates to a dispensing tool for carton forming processing, which comprises a main frame body, a rolling dispensing assembly is rotatably mounted on the main frame body, and the rolling dispensing assembly is connected with a pressurized liquid supply assembly mounted on the main frame body through a liquid supply supporting pipe. The rolling dispensing assembly comprises a rotating disc, supporting rib rods, a mounting ring plate and a telescopic dispensing mechanism, the rotating disc is rotatably connected with the main frame body, and the rotating disc is coaxially connected with the mounting ring plate through the supporting rib rods which are annularly arranged at intervals; and a plurality of telescopic dispensing mechanisms which radially coincide with the mounting ring plate are inserted into the mounting ring plate in a rotational symmetry manner. According to the utility model, the dispensing spacing distance can be changed according to requirements, so that the dispensing quality and the dispensing efficiency are improved, and meanwhile, the pressure-contact glue discharging can be realized, so that the overflow and splashing of glue liquid are reduced.

This utility model provides a novel hydraulic system for a rotary heat conveyor, belonging to the technical field of hydraulic equipment. It includes a first pipe, one end of which is connected to an oil tank, and the other end to the rod-side port of a hydraulic cylinder, for supplying hydraulic oil to the rod-side port to retract the piston rod. A second pipe, one end of which is connected to an oil tank, and the other end to the rodless-side port of the hydraulic cylinder, for supplying hydraulic oil to the rodless-side port to extend the piston rod. An electromagnetic directional valve is located adjacent to both the first and second pipes, allowing for cross-flow of hydraulic oil when supplying it to the hydraulic cylinder. This utility model allows for real-time adjustment of the hydraulic cylinder's operating speed through pressure regulation via the electromagnetic directional valve in conjunction with a pressure reducing valve. Furthermore, the electromagnetic directional valve enables bidirectional precise control, allowing seamless switching between the extension and retraction actions of the hydraulic cylinder.

The utility model relates to a plate shearing machine for processing a honeycomb aluminum plate, which comprises a cutter holder for supporting the honeycomb aluminum plate and a shearing cutter for shearing the honeycomb aluminum plate, and a third connecting table for mounting is arranged on one side of the shearing cutter. The third connecting table is provided with at least two supporting assemblies used for supporting the shear knife. According to the plate shearing machine for honeycomb aluminum plate machining, by arranging the supporting assembly, the effect of supporting a shearing knife can be effectively achieved in the using process of the plate shearing machine, and therefore it is guaranteed that the shearing knife can be attached to a knife holder more tightly in the using process; the shearing effect on the honeycomb plate is effectively improved; and by arranging the adjusting piece, the effect of adjusting the positions of the mounting table and the supporting wheel can be effectively achieved in the using process of the shear knife supporting device, and therefore the stability and adjustability of supporting the shear knife in the using process of the shear knife supporting device are guaranteed.

The steam turbine steam exhaust grading water spraying temperature reduction system comprises a pipeline, a valve and at least two nozzle sets, the nozzle sets are arranged on a low-pressure cylinder, the number of the nozzle sets is at least two, and the nozzle sets are arranged at different positions of the low-pressure cylinder, so that the nozzle sets work, and the corresponding low-pressure cylinder cooling areas are different; the working conditions of all the nozzle groups are matched with the maximum water spraying condition required by the corresponding steam turbine; each nozzle group is connected with an independent branch pipeline and an independent valve, the pipelines are used for supplying pressure fluid to the nozzle groups, the valves are used for controlling the opening and closing of the spraying states of the nozzle groups, and the working combination of the nozzle groups connected with the branch pipelines is realized through the opening and closing combination of the valves; according to the spraying control method of the steam turbine steam exhaust grading water spraying temperature reduction system, the multiple independent nozzle sets are arranged on the steam exhaust side of the low-pressure cylinder, and the different nozzle sets are combined for spraying according to the working condition needing cooling.

This utility model discloses a precision-drilled multilayer circuit board, belonging to the field of multilayer circuit boards. It includes a circuit board and rivets. Each rivet comprises a linkage structure, a clearance groove, a limiting ring, a riveting groove, an outer protective ring, an assembly ring, a riveting plate, a riveting connecting rod, an inner pressure ring, a snap-fit ​​groove, and a through groove. Through the combination of the outer protective ring and the limiting ring, and the inner riveting groove and the riveting plate, stacked rivets can be achieved. Each rivet can independently press the circuit board through the limiting ring, ensuring the stability between circuit board layers and improving interlayer positioning accuracy. Simultaneously, it reduces the pressure difference between layers, thereby reducing deformation caused by uneven interlayer stress, ensuring the accuracy of subsequent drilling, etc. It is not limited by the number or thickness of layers, allows for convenient assembly, and eliminates the need for multiple sets of riveting holes, saving circuit board space. During riveting, a single riveting connecting rod can drive all assembled rivets to be riveted simultaneously, eliminating the need for multiple riveting operations, ensuring stability while improving production efficiency.

The utility model discloses a kind of multi-grade adjusting back buckle assemblies, the utility model relates to the technical field of clothing accessories, the multi-grade adjusting back buckle assembly, including first strap, the first strap is flexible structure, and the left side of first strap is fixedly connected with connecting piece, the inside of connecting piece is linear array and is provided with two connecting holes, the utility model is formed rigid locking by the tooth slot of screw subassembly and step groove, compared with the friction force fixing mode of traditional buckle type back buckle, can bear greater tension without sliding, ensure that the length of braces is constant in the process of movement, limit band cooperates with lead-in groove, guide first strap moves along axial direction, prevent lateral deviation or distortion when adjusting, improve use stability, the elastic support of rubber side plate subassembly reduces mechanical wear, prolongs back buckle assembly service life, while knob component ergonomics design makes adjusting operation more labor-saving, single hand can be completed, significantly improve user experience.

The utility model relates to the technical field of vehicle engine assemblies, and discloses a hydraulic drive type variable compression ratio piston connecting rod assembly which comprises a piston upper body and a piston lower body, the piston upper body and the piston lower body are mutually clamped, and a cylindrical cavity between the piston upper body and the piston lower body is a main oil cavity. A connecting rod is installed at the bottom end of the lower piston body, an elastic assembly is connected between the upper piston body and the lower piston body and comprises a first fixing ring, a second fixing ring and a first spring, and a first connecting frame and a second connecting frame are installed at the top end of the first fixing ring and the bottom end of the second fixing ring correspondingly. According to the spring fixing device, personnel can conveniently install and fix the first spring between the lower piston body and the upper piston body, the stability of the first spring after installation is guaranteed, and therefore normal connection between the upper piston body and the lower piston body is guaranteed, and normal adjustment of the compression ratio is guaranteed.

The utility model relates to printer technical field discloses printer paper feed paper position adjusting mechanism, including the support fixed assembly for supporting firm, the inside of support fixed assembly is provided with the transmission assembly for driving, transmission assembly is used for adjusting the circumferential relative position of transmission bull gear and heaven and earth main gear in position adjusting assembly, outside transmission assembly is engaged with rack through change -speed gear group, drives fixed base one and drives adjusting swing board action, makes double gear wheel rotation, double gear wheel is engaged with transmission bull gear, heaven and earth main gear, drives rotating shaft rotation, thus adjusting swing board, fixed base one and the movement of the tab to sensor assembly, the circumferential relative position of transmission bull gear and heaven and earth main gear decides subsequent execution component synchronous accuracy, position adjusting assembly offsets assembly error through the dynamic change of two gear engagement phase, ensures transmission precision, the swing of adjusting swing board can fine adjustment two gear angle, adapts working condition, compensates wear and tear, prolongs life.

The application discloses a kind of overall sample plate devices of super large rod piece drilling positioning hole, including by movable sample plate assembly of sample plate and framework, sample plate includes riser sample plate and node plate sample plate, multiple riser hole group windows are opened in the length direction of riser sample plate, at least two node plate hole group windows in different angles are opened in node plate sample plate, arc-shaped channel is equipped in node plate sample plate and is connected with the downside of node plate hole group window, first fine adjustment guide rail frame and second fine adjustment guide rail frame are equipped in the length direction of riser sample plate and are located in the left and right ends of arc-shaped channel, movable drill sleeve device is equipped on the guide rail of the side facing bridge plate in first fine adjustment guide rail frame, positioning guide rail frame is equipped in node plate hole group window, adjusting device for moving adjustment drill sleeve device is equipped in node plate sample plate.The overall sample plate device of the application can guarantee the adjustment of different rod piece hole distance, can realize the drilling of entire project upper and lower chord, and satisfies the drilling of different models of plate.

The application relates to the technical field of ultrasonic transducers, in particular to an ultrasonic transducer signal anti-interference transmission method and device, which comprises a signal preprocessing unit, an anti-interference unit, an isolation driving unit and a receiving demodulation and decoding unit; the signal preprocessing unit receives original electric signals and differentially amplifies to generate differential signals; the anti-interference unit collects the working environment temperature in real time through a temperature monitoring module, an encoding strategy selection module and a modulation parameter control module dynamically select optimal encoding rules and adjust modulation parameters according to the working environment temperature, and a signal processing module converts the differential signals into digital signals and completes encoding modulation; the isolation driving unit isolates the signals and power amplifies; the receiving demodulation and decoding unit demodulates and decodes according to corresponding rules and restores ultrasonic signals; the application dynamically adapts the encoding rules, the modulation parameters and the heat dissipation strategy through temperature monitoring, suppresses the high-temperature performance drift of the anti-interference unit and guarantees reliable transmission of the ultrasonic transducer signals.

The invention relates to a tunneling face dust control device which comprises an air pressing barrel arranged on one side of a tunneling roadway in the width direction and an air draft barrel arranged on the other side of the tunneling roadway in the width direction, and further comprises air guide devices arranged on the air draft barrel and the air pressing barrel correspondingly. The air guide device is located on one side of the tunneling roadway in the width direction and provided with a plurality of air ports which are arranged in a multi-layer mode and open towards the other side, and the included angle between the air flow guiding direction of the air ports and the radial plane of the tunneling roadway is adjustable. The air flow flowing through the multiple air ports of the air guide device arranged on the air draft barrel correspondingly forms a plurality of layers of negative pressure areas, the air flow flowing through the multiple air ports of the air guide device arranged on the air pressing barrel correspondingly forms a plurality of layers of air pressing dust control air curtains, and at least one negative pressure area corresponds to at least one air pressing dust control air curtain. According to the technical scheme provided by the invention, the blocking and treatment effects on dust in the tunneling roadway can be improved.

The utility model discloses a drawing type keyboard assembly which comprises a base support mechanism, two opposite ends of the base support mechanism are respectively provided with a sliding groove; the keyboard mechanism is movably arranged in the sliding groove; at least one first magnetic attraction piece is fixedly arranged on the base support mechanism. At least one limiting magnetic attraction set is fixedly arranged on the keyboard mechanism, and each limiting magnetic attraction set comprises a plurality of second magnetic attraction pieces arranged side by side in the Y-axis direction. According to the tablet computer keyboard with the rotating shaft support, the second magnetic attraction pieces are attracted to the corresponding first magnetic attraction pieces respectively, so that fixing of different relative positions between the keyboard mechanism and the base support mechanism is achieved, and the problem that an existing tablet computer keyboard with the rotating shaft support is poor in use experience is effectively solved.

The utility model relates to the technical field of buildings, in particular to a building model display device which is internally provided with a chassis, the upper end face of the chassis is rotationally provided with two sets of lifting shafts which are in bilateral symmetry, the outer circle faces of the lifting shafts are provided with lifting sliding blocks capable of moving up and down, and the end faces of the mutually symmetrical sides of the lifting sliding blocks are fixedly provided with a lifting rack. A rotating shaft is rotationally arranged on the upper end face of the lifting rack, a rotating rack is fixedly arranged on the outer circle face of the rotating shaft, and a square hole with an upward opening is formed in the rotating rack, so that it is ensured that adjustment can be conducted according to the height of a client, the display height can be further ensured to be adjusted in real time, and the viewing effect of the client is further ensured to be better met; and a rotating motor arranged in the device starts to be started, then a rotating rack, a main box body and a model body are adjusted to start to rotate, then it is ensured that a customer can watch the whole view of the model body at one position, the watching comfort is ensured, and the practicability of the device is further ensured.

The utility model discloses a quick positioning structure, including the top post, the top post sets up one side at spring upper board, the other side of spring upper board is linked with the one end of straight line guide pillar, the other end of straight line guide pillar is in proper order through spring, guide pillar cover, spring lower board and straight line bearing and is linked with guide pillar connecting plate, the guide pillar cover is connected on spring lower board through fastener, the spring is established on the straight line guide pillar between spring upper board and guide pillar cover, straight line bearing is connected on spring lower board through fastener. The quick positioning structure in the utility model can realize the accurate quick positioning of pneumatic scissors and plastic part gate, avoids the problems of too deep, too high etc. in the process of shearing of gate, satisfies the product quality requirement.

The application discloses a portable multipurpose wireless projection expansion dock, and belongs to the field of expansion dock structures.The portable multipurpose wireless projection expansion dock comprises a storage sphere, the storage sphere is composed of an upper sphere and a lower sphere, the upper sphere and the lower sphere are connected through a plurality of elastic expansion components, the outer sidewalls of the upper sphere and the lower sphere are connected with protective half-sphere covers through arc-shaped moving assemblies, and a multifunctional ball is arranged on the inner bottom of the upper sphere, and a projection assembly and an annular sound assembly are arranged on the multifunctional ball.The expansion dock is designed into a sphere, and the sphere is arranged as the upper sphere and the lower sphere which can be folded and unfolded, the expansion dock can be unfolded for reasonable use in use, and the expansion dock can be stored into a sphere for convenient carrying;the structure is simple, each component can be used in cooperation and independently, the expansion dock is provided with functions of data conversion, data storage, sound emission and wireless projection, and each component can be effectively stored in storage to effectively protect each component.

The utility model relates to the technical field of LEDs, in particular to an LED illuminating lamp capable of adjusting the irradiation direction, a main box body is arranged in the LED illuminating lamp, a rotating shaft is rotationally arranged on the upper end face of the main box body, then the rotating shaft plays a role in direction adjustment, a rotating rack is fixedly arranged on the outer circle face of the rotating shaft, and a swing cavity connected with the outside is formed in the rotating rack. A swing shaft is rotatably arranged between the left wall and the right wall of the swing cavity, then the swing shaft plays a role in angle adjustment, a swing rack is fixedly arranged on the front end face of the swing shaft, an LED illuminating lamp body is fixedly arranged on the front end face of the swing rack, the LED illuminating lamp body is cylindrical, and four sets of positioning racks which are annularly and evenly distributed are fixedly arranged on the front end face of the swing rack. And therefore, the irradiation range of the LED illuminating lamp body can be adjusted in real time, it is ensured that the LED illuminating lamp can be adjusted according to the use range, and the practicability of the LED illuminating lamp is ensured.

The embodiment of the invention discloses a method for autonomously switching a sound area by a spokesman and related equipment. The method comprises the steps that a microphone array notifies existence of the microphone array according to a passive broadcast mode; in response to the fact that the microphone array is found by the UI configuration software, a VIP identity ID and sound area binding relation table and a sound area configuration table issued by the UI configuration software are received, the binding relation table records each VIP identity ID or a sound area mapped by the combination of multiple VIP identities ID, and the sound area configuration table records the configuration of each sound area; and in response to a received speaking request of at least one spokesman operation unit, analyzing the speaking request to obtain the VIP identity ID of the at least one spokesman operation unit, and performing sound area configuration updating on the microphone array based on the VIP identity ID of the at least one spokesman operation unit, the binding relation table and the sound area configuration table, and when there is no speaking request, default sound area configuration is used.

This utility model discloses a public network equipment installation and fixing device for subway tunnels, including a tunnel wall panel, public network equipment, and cables. A first installation device is installed on the tunnel wall panel, and the public network equipment is installed on the first installation device. The public network equipment consists of a housing and a main body. The first installation device consists of a frame, a sleeve, a screw, a ball joint, and a connecting seat. Through the setting of the first installation device, the public network equipment is installed and fixed on the arc surface of the tunnel wall panel. The total length between the screw and the sleeve is adjusted through the threaded connection between the sleeve and the screw. This allows the length of the screw extending out of the sleeve to be adjusted according to the distance between the frame and the arc surface of the tunnel wall panel, thereby ensuring that the vertical angle of the public network equipment is adjustable after installation and avoiding tilting. At the same time, the movable connection of the connecting seat on the ball joint allows the connecting seat to be adjusted adaptively according to the arc surface of the tunnel wall panel, improving the fitting effect and stability.

This application relates to the technical field of temperature and humidity environment chamber equipment, and in particular to a temperature and humidity environment chamber with adjustable air inlets and outlets. The chamber includes a chassis, within which a ventilation box is installed. The ventilation box has an air outlet panel and a return air panel mounted on it, arranged opposite to each other. The chassis is equipped with an air exchange component for controlling the flow of gas within the ventilation box, and the ventilation box contains an adjustment component for regulating the airflow direction. This application improves the ease of operation of the temperature and humidity environment chamber with adjustable air inlets and outlets.

The application discloses a large-load full-permanent-magnetic electric-driving load-adjustable three-freedom-degree magnetic suspension vibration isolator, which comprises a bottom plate, a plurality of vertically arranged columns symmetrically distributed in a circle on the bottom plate, a vibration isolation unit arranged in each column, a sliding connection between the vibration isolation unit and the column, a placing platform arranged above the bottom plate, a hinge connection between the end of the placing platform and the corresponding column through a plurality of parallel connecting rods, and a space coupling of the stator and the mover permanent-magnetic array of the vibration isolation unit, so that the positive and negative stiffness mechanisms cooperatively generate a static suspension force in the load direction at the balance position, and the load upper limit is significantly improved. An adjusting mechanism is arranged in the support shaft, and the non-contact follow-up adjustment of the magnetic gap and the load adjustment are realized by using the magnetic repulsion force between the stators without interfering with the completely suspended state of the mover. The maximum load weight of the application reaches 100 kg, and the initial vibration isolation frequency is as low as 0.7 Hz. The application has the advantages of large bearing capacity, no Joule heat interference, adjustable load, and excellent three-direction ultra-low-frequency vibration isolation performance.

The invention discloses a high-strength trampoline protective net machining device, and relates to the technical field of trampoline protective net machining. The high-strength trampoline protective net machining device comprises a base, supporting legs are fixedly connected to the bottom of the base, and a cutting mechanism is fixedly connected to the top of the base. According to the high-strength trampoline protective net machining device, the electric sliding block drives the cutting knife to reciprocate along the sliding rail, and continuous cutting of the protective net is achieved. A telescopic machine in the auxiliary mechanism is matched to drive a cross rod to rotate, a round roller is driven to periodically press a lantern ring downwards, the cutting force of a cutter to the protective net is enhanced, the cutter clamping stagnation phenomenon caused by material toughness is effectively reduced, and the stability and efficiency of the cutting process are improved; the meshing transmission of a gear and a toothed plate in the auxiliary mechanism drives two guide plates to intermittently move towards each other or away from each other, the protective net can be timely stirred outwards after cutting is completed, and the cut net pieces are prevented from being mutually stacked or wound.

This invention discloses an optimization device and method for laser spot edge diffraction, relating to the field of optical instrument technology. The optimization device includes two sets of guiding mechanisms, two sets of driving mechanisms, and two sets of aperture pairs. Each aperture pair includes two opposing aperture plates, the edges of which are used to define the light transmission boundary and have a serrated structure. The driving mechanisms drive the two aperture plates in the same set to move synchronously in opposite directions along the guiding direction. The positions of the two aperture pairs are independently controlled to combine and form different light transmission boundaries. In the optimization method, the positions of the two aperture pairs are adjusted according to the edge morphology of the laser beam to be optimized, and the laser beam is made to pass through the target light transmission boundary for edge intensity modulation. Through the technical solution of this invention, the edge diffraction caused by traditional straight-edge apertures is reduced, and the edge smoothness of the laser beam, the flexibility of light transmission boundary adjustment, the adaptability to different spot morphologies, the shaping consistency, and the processing stability are improved.

This application discloses an adjustable extra-large door system, comprising: a doorpost, the two ends of which are respectively installed in a top groove and a bottom groove via connectors; a door frame, which is snapped onto the doorpost; and a door leaf, which is connected to the door frame via hinges. The bottom of the door frame is provided with a roller device, which includes: a roller mechanism, a roller device bracket, and an adjusting device. The roller mechanism is mounted on the adjusting device, the adjusting device is fixed to the roller device bracket, and the roller device bracket is installed at the bottom of the door frame. The roller system at the bottom of the door leaf allows for height adjustment and can also serve as a support system. It ensures door leaf height adjustment while preventing sagging caused by the door's own weight and structural deformation. Adjusting the bottom adjusting bolts of the door leaf adjusts the height of the rollers to support the weight of the door leaf. The system is simple to install, has a convenient structure, and is easy to operate.