52results about How to "With self-locking ability" patented technology

The utility model discloses a copper-aluminum composite pipeline connecting structure which comprises a main body section, the two sides of the main body section are each fixedly connected with a connecting assembly, the connecting assemblies are in external threaded connection with a pipeline, the connecting assemblies are sleeved with belleville spring washers, the connecting assemblies are in external threaded connection with hexagon nuts, and the hexagon nuts are sleeved with belleville spring washers. The belleville spring washer is located between the pipeline and the hexagon nut, and the hexagon nut is tightened to extrude the belleville spring washer to abut against the pipeline. According to the utility model, the belleville spring washer is extruded by the hexagonal nut to abut against the pipeline, and under the action of the elastic force of the belleville spring washer, the threaded connection of the pipeline and the threaded connection of the hexagonal nut are extruded, so that the threaded connection has a certain degree of self-locking performance, and the sealing performance between the pipeline and a connecting assembly is enhanced.

The utility model relates to the field of metal part machining, in particular to a welding device for laser metal part machining. Comprising a box body, a box door, a welding mechanism, a transmission rod, a driving mechanism, a driving gear and the like, a box door is arranged on the box body, a welding mechanism is arranged on the top of the inner side of the box body, a transmission rod is rotatably arranged in the box body, a driving mechanism used for rotating the transmission rod is arranged in the box body, two driving gears are slidably arranged on the transmission rod, the transmission rod can drive the two driving gears to rotate, and air cylinders are arranged on the two sides in the box body. Pistons of the two air cylinders are connected with the two connecting frames respectively. The driving mechanism drives the transmission rod to rotate, so that the metal part is turned over, the welding mechanism can weld the metal part at different angles, a metal plate does not need to be repeatedly disassembled and fixed, and the welding efficiency is improved.

The utility model discloses a front railing machine collision prevention device which comprises a shell, a rotating motor is installed on the outer surface of the shell, symmetrical first bearings are embedded in the inner wall of the shell, the inner rings of the two first bearings are jointly connected with a worm, and the output end of the rotating motor is connected with one end of the worm through the first bearings. According to the anti-collision device of the front railing machine, the worm can be driven to rotate through the rotating motor, the worm is meshed with the worm gear, the worm gear drives the baffle to ascend and descend, a vehicle is blocked, the anti-collision device has the self-locking performance, when damage occurs, the stop lever cannot automatically fall, and when the vehicle is detected through the microwave infrared vehicle detector, the anti-collision effect is good. When it is dark, the power supply assembly supplies power to the light bar, and the light-operated switch controls the light bar to light automatically, so that a driver can clearly see whether the stop lever is lifted or not, and the stop lever is prevented from being collided by mistake.

The utility model discloses a dairy product storage tank convenient to disinfect, and relates to the field of dairy product storage tanks, the dairy product storage tank comprises a tank body, the top of the tank body is provided with a mounting port, the top of the tank body is also provided with a mounting ring through a bolt, and the inside of the mounting ring is connected with a turntable through a bearing. By arranging the lifting ring, the first pulling plate, the stirring blades, the second pulling plate, the threaded rod, the rotating shaft, the worm and the worm wheel, when the angle of the stirring blades needs to be adjusted, a worker rotates the worm through a knob, the worm rotates to drive the worm wheel to rotate, the worm wheel drives the rotating shaft to rotate, and the rotating shaft rotates to drive the threaded rod to rotate; a threaded rod rotates to drive a lifting ring to move, a first pulling plate is pulled to rotate when the lifting ring moves, and the first pulling plate pulls four stirring blades above to rotate, then pulls a second pulling plate to rotate and drives stirring blades below to rotate, so that the inclination angle of the stirring blades is adjusted, and the stirring effect and efficiency of the dairy products are further improved.

The utility model relates to the technical field of railway track drilling, in particular to an adjustable lithium battery steel rail drilling machine positioning structure which comprises a fixing support, two sets of installation frames and positioning blocks, the two sets of installation frames are arranged on the left side and the right side of the fixing support respectively, and the two sets of positioning blocks are connected into the installation frames in a vertically symmetrical and sliding mode. A rotating rod is rotationally connected into the mounting frame, two sets of threaded sections which are symmetrically arranged up and down are arranged on the periphery of the rotating rod, a threaded hole is formed in the positioning block, a worm gear is fixedly mounted on the periphery of the rotating rod, a fixing box is fixedly mounted on one side of the mounting frame, a worm is rotationally mounted in the fixing box, and the worm is meshed with the worm gear; a knob is fixedly mounted at one end of the worm; the worm is rotated through the knob, the worm is meshed with the worm gear, so that the rotating rod is driven to rotate in the mounting frame, the two sets of positioning blocks can be driven to slide reversely in the mounting frame through matching of the threaded sections and the threaded holes, and the distance between the two sets of positioning blocks is adjusted.

The invention discloses a pipeline type multi-stage biological deodorization device which comprises a bio-trickling filter structure section, a connecting device, a pre-wetting structure section and a fine treatment structure section, and the connecting height of the bio-trickling filter structure section and an odor output pipe can be adjusted through the bio-trickling filter structure section; the connecting device is arranged at the rear end of the top of the bio-trickling filter structure section; the pre-wetting structure section is arranged at the left moving end of the connecting device; the biological filtration fine treatment structure section is arranged at the right side moving end of the connecting device and can drive a center component in the top of the biological trickling filtration structure section to rotate and stir in a limiting manner, and the connecting device can drive the pre-wetting structure section and the biological filtration fine treatment structure section to synchronously expand and contract; the fillers in the left end and the right end of the top of the bio-trickling filter structure section are clamped and fixed; in conclusion, flexible adjustment, linkage and quick connection and disconnection of the structural sections are achieved through multiple assemblies, and the odor purification quality and the deodorization efficiency are high.

The utility model discloses a portal type welding machine, including door type frame, the lower surface middle part of the crossbeam of door type frame is equipped with welding robot, still include quick -witted fixed establishment, quick -witted fixed establishment: it includes recess, rectangular slot, L type rod, dovetail slide groove and dovetail sliding block, the upper surface of door type frame's crossbeam is seted up with recess, and the bottom wall of recess is seted up with rectangular slot respectively, and the inside of rectangular slot is slidably connected with L type rod respectively, and L type rod all installs with welding robot cooperation, and the inside wall of the long side of rectangular slot is seted up with dovetail slide groove respectively, and the outside of L type rod all is fixedly connected with dovetail sliding block, and dovetail sliding block all with located in same rectangular slot and the inside slidably connected of adjacent dovetail slide groove, this portal type welding machine, greatly reduce the equipment downtime maintenance time, and the operation convenience is enhanced, and the production continuity is promoted, and the precision stability of guaranteeing portal type welding machine long -term welding.

The utility model provides a kind of self-adapting guide wheel adjusting device for stacking machine loading platform, belong to loading platform guide wheel technical field, including bearing platform;Two main springs symmetrically arranged in the inner side wall of the bearing platform;Sliding table one and sliding table two respectively arranged in one end of two main springs;Respectively arranged on the outer wall of the opposite side of sliding table one and sliding table two Branch arm;Guide wheel platform is arranged on the outer wall of one side of the branch arm;Guide wheel is rotated in the central position of the outer wall of one side of the guide wheel platform;Self-locking assembly is arranged between two branch arms;The utility model moves after being closely attached on the outer side wall of the column of stacking machine according to the self-wear state of guide wheel, the position of guide wheel can be adjusted in real time, to ensure the stability of loading platform in the inner side of stacking machine lifting movement, and guide wheel adjustment has unidirectionality and self-locking by self-locking assembly, realize the locking of the position of two guide wheels, avoid the generation of guide wheel center deviation.

The application provides a precise scribing device for power distribution cabinet mounting plate assembly positioning, and belongs to the technical field of power distribution cabinet assembly. The device solves the technical problems of unstable positioning, limited adjustment range and low scribing precision of existing scribing devices. The precise scribing device for power distribution cabinet mounting plate assembly positioning comprises a telescopic rod, the surface of the telescopic rod is rotationally connected with a bracket assembly, the bracket assembly comprises two side plates rotationally connected to the outer wall of the telescopic rod, the two side plates are distributed in parallel, and a connecting plate is fixedly installed between the two side plates. In the application, the telescopic rod, the bracket assembly, the suction cup fixing, the stand and the moving block are arranged, so that the telescopic rod and the suction cup driving device are formed with multiple-point fixation in the power distribution cabinet, effectively solving the problems of easy displacement and inaccurate positioning of traditional scribing tools. Moreover, the two positioning plates at any positions can be synchronously flipped through the worm and gear transmission, so that the mounting plate is attached to the inner wall of the cabinet body.

The invention belongs to the technical field of space structure and energy electronic integrated design, and particularly relates to a foldable composite material and a preparation method, application and use method thereof. The photoelectric conversion function and the communication radiation function are simultaneously borne on a single flexible structure, the high expansion area ratio and the high structural strength are achieved through paper folding geometry, and energy and communication resource collaboration and structure and function integrated design are achieved. According to the invention, co-fusion design of structure, energy and communication is realized, the area-mass ratio and the system integration degree are greatly improved, and the mass of the unfolding mechanism is reduced; the self-unfolding and self-locking capability is achieved, and the on-orbit reliability is improved; and the perovskite solar cell layer and the conductive antenna are cooperatively optimized, so that the comprehensive energy efficiency and the electromagnetic performance stability are improved.

The utility model discloses a prefabricated beam board quick detachable formwork supporting device relates to prefabricated beam board quick detachable formwork technical field, including stable mechanism, the stable mechanism is provided with two, two the stable mechanism includes stable board, push board, through groove and sliding assembly, the through groove is set up in the support seat left and right sides, push board outer surface sliding connection in through groove inner wall, the stable board opposite side fixed connection in push board opposite end, sliding assembly sets up in push board opposite end. The utility model discloses a stable mechanism is set up, has solved to the support of different prefabricated beam, needs to replan the plane layout of support column, repetitive handling, positioning and adjustment work, not only has greatly increased the preparation time before construction, and reduced the construction efficiency problem.

The utility model relates to moxa -moxibustion frame technical field, concretely is a kind of bifurcated multi -head moxa -moxibustion moxa -moxibustion frame, including base, lifting pipe, top box, fan and support tube fixed on base, support tube is sleeved in the outer wall of lifting pipe.Compared with prior art, the patent is through setting drive shell, drive assembly, threaded hose, connecting block and fixed assembly, first drive assembly inside drive shell drives lifting pipe to carry out the height adjustment, so that adjustment is more convenient and fast, lifting pipe does not appear the situation of falling simultaneously, moxa -moxibustion in the smoke produced by combustion can be entered into threaded hose inside through top box, smoke is discharged through threaded hose and fan, then by adjusting fixed assembly, top box is separated from lifting pipe, then can screw inner thread cylinder and separate outer thread cylinder, then again threaded hose and fan are separated, worm gear self-locking and detachable flue design synergistically solve the technical problems of lifting instability and flue blockage in prior art.

The utility model relates to the technical field of roller forming production, in particular to logistics sorting transfer trolley roller production equipment which overcomes the defects of roller forming production in the prior art and comprises a base, an air cylinder is fixedly connected to one side of the base, a telescopic rod is arranged on one side of the air cylinder, and one end of the telescopic rod is fixedly connected with a sliding plate. A pair of guide plates is arranged on the surface of the base, the sliding plate is slidably connected with the interiors of the guide plates, a grinding assembly is arranged on one side of the base, a second fixing seat is fixedly connected to one side of the sliding plate, a second motor is fixedly connected to one side of the second fixing seat, a rotating rod is arranged on one side of the second motor, and a pair of connecting rods is fixedly connected to one side of the rotating rod. One side of the connecting rod is fixedly connected with a fixing piece, the interior of the fixing piece is in threaded connection with a screw rod, one end of the screw rod is rotationally connected with a top block, and the grinding device has the advantages of being high in practicability, good in grinding effect and stable.

This utility model discloses a robust RF connector structure, including a hollow base with an insertion hole at the top. A connector body is positioned above the hollow base, and an auxiliary box is fixedly mounted at the bottom of the connector body. Insertion holes are provided on all four outer walls of the auxiliary box. A driving mechanism and four insertion mechanisms are disposed within the hollow base. The driving mechanism includes a rotating shaft rotatably connected to the bottom of the hollow base, a worm gear fixedly mounted on the outer wall of the rotating shaft, and a worm rotatably connected between the two inner walls of the hollow base. This utility model, by setting up the driving mechanism and insertion mechanisms, allows the four insertion rods to be inserted into or moved away from the insertion holes simply by rotating a knob, thereby achieving locking and unlocking of the connector body. The operation is simple and convenient, and the worm gear and worm wheel have self-locking properties, resulting in a more robust connection.

The utility model relates to reinforcing bar processing equipment technical field discloses reinforcing bar cutting device for reinforcing bar detection, including operation base and mounting plate no.

The utility model discloses an aluminum formwork climbing frame supporting device which comprises an outer pipe, a driving seat arranged at one end of the outer pipe, a first end of a screw rod penetrating through the driving seat and extending into the outer pipe, a guide groove formed in the inner wall of the outer pipe, a positioning pin arranged at the first end of the screw rod, and a first bevel gear rotationally arranged in the driving seat, the second bevel gear is rotationally arranged in the driving seat and is meshed with the first bevel gear, and the driving piece is coaxially connected with the second bevel gear; the first bevel gear directly drives the screw rod through threaded connection, rotary motion is accurately converted into axial thrust through matching of the guide groove and the positioning pin, self-locking performance is achieved, safety is improved, the second bevel gear is driven to rotate through the driving piece, the second bevel gear drives the first bevel gear to rotate, the power transmission direction is changed, and the power transmission efficiency is improved. And when the two ends of the supporting device are stressed, the supporting distance can still be conveniently adjusted, and the construction efficiency is improved.

The utility model discloses a processing table for manufacturing an advertising board. The processing table comprises a working table, a driving assembly is arranged on the outer surface of the working table, a supporting assembly is arranged in the working table, a gear is arranged on the outer surface of the supporting assembly, a rotating disc is arranged at the top end of the supporting assembly, and the upper surface of the rotating disc is connected with symmetrical first pin shafts. The driving assembly drives the gear to rotate, the rotating disc can rotate and has the self-locking performance, the rotating rotating disc drives the two connecting rods to move relatively through the first pin shaft, the second pin shaft drives the movable block to move relatively in the movable opening, and therefore the distance between the two adjusting frames is adjusted to be matched with the length of the advertising board, and the advertising board is convenient to adjust. The distance between the positioning assemblies is adjusted by rotating the two-way threaded rod, so that the positioning assemblies can position the advertising board according to the width of the advertising board, and the problem that an existing processing table for manufacturing the advertising board is generally only suitable for the advertising board of one specification, and consequently the practicability is low is solved.

This invention relates to a hysteretic loading test system for small-tonnage dampers, belonging to the field of vibration control technology. It includes a steel main frame, H-beams, a lifting system, a guiding device, a loading system, a data acquisition system, and a damper connection device. The steel main frame includes a top plate, a bottom plate, and a platform plate on the same plane of symmetry; the lifting system includes a worm gear lift, a lead screw, an AC motor, and eccentric blocks; the guiding device includes two spaced linear optical axes; the loading system includes a servo electric cylinder, a servo driver, a braking resistor, and a PLC module; the data acquisition system includes a data acquisition instrument, sensor connectors, spoke-type tension / compression sensors, synchronization bolts, and wire-type displacement gauges; the damper connection device includes a force transmission support and a damper connection conversion platform. This invention can be applied to hysteretic loading tests of small-tonnage dampers, testing the mechanical properties of dampers, and can also be applied to other mechanical tests.

The utility model discloses a kind of quick die-changing motor stator stamping device, belong to stamping device technical field.This kind of quick die-changing motor stator stamping device, including main body, fixed mechanism and die mechanism, main body includes punch press, and the bottom side of punch press is fixedly installed with stamping table;Fixed mechanism includes a pair of fixed plate, and a pair of fixed plate is respectively connected with the stamping head bottom end of punch press and the upper end of stamping table, and the center of the opposite surface of a pair of fixed plate is equipped with transmission box, and the opposite surface of a pair of fixed plate is located and is equipped with movable slot in the both sides of transmission box, and the inside of movable slot is rotatably connected with screw rod, and screw rod is all connected with L-shaped moving block with screw thread, and a pair of L-shaped moving block are mirror image set between;Die mechanism includes lower die holder and upper die holder, and lower die holder and upper die holder are respectively set in the opposite surface of a pair of fixed plate, and the utility model, can effectively improve the practicality of motor stator stamping device, with higher practical value.

The utility model discloses a motor with a braking function, which comprises a motor main body, a driving shaft and a braking device, the braking device comprises a friction ring and an elastic ring, the friction ring is sleeved on the driving shaft and is provided with a plurality of arc-shaped friction plates attached to the surface of the driving shaft along the circumferential direction, and a gap is formed between every two adjacent arc-shaped friction plates; the elastic ring is sleeved on the peripheral wall of the arc-shaped friction plate and is used for enabling the arc-shaped friction plate to radially contract so as to press the driving shaft; and a limiting part is arranged on the friction ring, is in limiting fit with the motor main body and is used for limiting rotation of the friction ring. According to the motor with the braking function, the friction ring is not easy to wear, the service life is long, and the self-locking stability is good.

The utility model discloses an energy-saving rotary electric crucible furnace which comprises a base and a crucible furnace body, the crucible furnace body is connected with the base through an adjusting mechanism, and the adjusting mechanism comprises a first side frame and a second side frame which are symmetrically arranged. A mounting seat connected with the bottom of the crucible furnace body is arranged on the sides, close to each other, of the first side frame and the second side frame, and symmetrically-arranged side plates are arranged on the two sides of the top of the mounting seat. According to the crucible furnace, metal solution is poured into a designated position, automatic operation is achieved, contact of workers with the crucible furnace body can be reduced, machining accidents generated when machining personnel pour the metal solution can be reduced, the protection performance is improved, the self-locking function is achieved between the worm gear and the worm, the crucible furnace body cannot reset, and the machining efficiency is improved. Therefore, the stability of pouring the metal solution is improved; and through the design of the base plate and the sliding groove, the base can be driven to rotate in the circumferential direction, so that the two sets of crucible furnace bodies can alternately melt and preserve heat of molten aluminum.

The utility model discloses a chip mounting structure of a chip mounter, which comprises a mechanical arm and an air guide column, the air guide column is positioned at the bottom of the mechanical arm, the bottom of the air guide column is provided with a chip mounter nozzle, and the air guide column is provided with a reinforcing mechanism for fixing the chip mounter nozzle; the reinforcing mechanism comprises a mounting groove formed in the bottom of the air guide column, the top of the chip mounter nozzle is mounted in the mounting groove, and a plurality of positioning columns which are uniformly and movably connected surround the interior of the mounting groove. After the chip mounter nozzle is mounted in the mounting groove, the three groups of positioning columns synchronously move outwards and are correspondingly inserted into the three groups of positioning holes respectively, so that quick mounting of the chip mounter nozzle is completed, convenience of mounting and dismounting of the chip mounter nozzle by workers can be improved, the worm gear and the worm have self-locking performance, and the mounting efficiency is improved. The situation of reset loosening of the positioning column can be avoided, and the connection tightness and stability of the chip mounter nozzle and the air guide column are ensured.

The utility model discloses a cloth punching device for advertisement design, and belongs to the technical field of punching devices. The cloth punching device for advertisement design comprises a box body, a punching mechanism and a collecting mechanism, the punching mechanism comprises a mounting frame, the bottom end of the mounting frame is connected with the two sides of the upper end face of the box body, a moving plate is slidably inserted into the mounting frame, a plurality of mounting bases are fixedly mounted at the bottom end of the moving plate, and cylindrical cutters are in threaded connection with the interiors of the mounting bases; stamping grooves are formed in the positions, located at the bottom ends of the multiple cylindrical cutters, of the upper end face of the box body, and the bottom ends of the cylindrical cutters are movably connected with the stamping grooves in an inserted mode. The collecting mechanism comprises a pair of movable seats, the movable seats are arranged at the two ends of one side of the box body respectively, a collecting cover is rotationally connected between the movable seats, a dust collector is installed on the bottom side of the box body, a connecting hose is connected to one side of the upper end of the collecting cover in an inserted mode, and one end of the connecting hose is connected with the input end of the dust collector. And the practicability of the punching device can be effectively improved.

This invention discloses a camera focusing mechanism and module based on an ultrasonic micromotor structure, belonging to the field of camera focusing mechanism design. It includes a piezoelectric thin film-driven ultrasonic micromotor, a sloping driven structure, a spring structure, and a housing with a slotted structure and a housing protrusion structure. When the stator structure of the ultrasonic micromotor generates a standing wave or traveling wave under the excitation of an external signal, the stator protrusion structure undergoes elliptical motion. This elliptical motion drives the friction layer, magnetic material layer, and sloping driven structure in the rotor structure to rotate. During rotation, the rotational direction is constrained by the cooperation of a limiting post and the slotted structure, while the sloping driven structure moves linearly along the optical axis. The housing protrusion structure and the outer edge of the rotor structure provide planar positioning. This invention achieves higher adjustment accuracy and faster response speed, making it more suitable for embedding in camera module structures of mobile phones and other terminal applications.

The invention provides a self-locking structure for structure actuation, which comprises N groups of three-buckling-beam bistable structures and N-1 groups of connecting structures, the N groups of three-buckling-beam bistable structures and the N-1 groups of connecting structures are connected in series, two groups of longitudinally adjacent three-buckling-beam bistable structures are connected through one group of connecting structures, and N is a positive integer and is greater than or equal to 2; the self-locking structure comprises a plurality of three-buckling-beam bistable units which are sequentially arranged in the transverse direction and a plurality of connecting units which are sequentially arranged in the transverse direction. The self-locking structure is connected with an external motor or a driving device through a supporting rod, reciprocating motion in the longitudinal direction is achieved, and self-locking of the three-buckling-beam in the three-buckling-beam bistable unit in the protruding state and the concave state can be achieved without an additional locking mechanism.

The utility model discloses a clamping structure and a blade repairing device, which comprises two oppositely arranged clamping pieces, a blade base arranged between the two clamping pieces, a driving assembly, a penetrating rod and two abutting pieces movably sleeved outside the penetrating rod, the clamping pieces are provided with movement holes for the penetrating rod to penetrate through and slide, and the blade base is arranged on the blade base. The two abutting pieces are arranged on the sides, away from each other, of the two clamping pieces correspondingly. The blade base repairing device has the advantages that in the repairing process, a blade base can be firstly placed in the center of the workbench, then the abutting pieces on the penetrating rods are sequentially rotated, the two oppositely-arranged clamping pieces move oppositely, then the blade base is completely clamped, and fixing of a blade is achieved; the diameter of the moving hole is set to be larger than that of the penetrating rod, so that when the abutting piece extrudes the clamping piece to move, the clamping piece deviates to a certain degree according to the shape of the blade base and is better attached to the blade base, and therefore the clamping force of the clamping piece on the blade base is improved.

This utility model discloses a portable geological prospecting auxiliary drawing stand, belonging to the technical field of geological exploration auxiliary equipment. This portable geological prospecting auxiliary drawing stand includes a folding tripod, with a column mounted at the top of the tripod, and a fixed base mounted at the top of the column. A rotating shaft is rotatably connected to the inner side of the fixed base, and movable frames are mounted at both ends of the rotating shaft. An adjustment mechanism for rotating the rotating shaft is provided inside the fixed base. A vertical plate is mounted at one end of the movable frame, and a slide rail is mounted on one side of the vertical plate. A first slider is slidably connected to the bottom outer end of the slide rail. A first drawing board clamp is mounted at the top one side of the first slider, and a threaded hole is opened at the bottom one side of the first slider. A locking knob is installed inside the threaded hole. A second slider is slidably connected to the top outer end of the slide rail. This utility model can effectively achieve rapid and stable adjustment of the drawing angle, adapting to different drawing needs and possessing high practical value.

The invention discloses a length-adjustable post-cast strip supporting component convenient to disassemble. The post-cast strip supporting component comprises a supporting stand column, a hollow cavity, a fine adjustment rotating piece, a coarse adjustment limiting mechanism, a left limiting block, a left holding handle and a right holding handle. A hollow cavity is formed in the supporting stand column in the axial direction, an empty groove is formed in the side wall of the supporting stand column in the axial direction and communicates with the hollow cavity, an outer threaded hole is formed in the outer wall of the supporting stand column and is adjacent to the empty groove, and an adjusting column is embedded in the hollow cavity. Modular design is adopted, a two-stage length adjusting mechanism is constructed through a coarse adjustment limiting mechanism and a fine adjustment assembly, an adjusting column is embedded in a hollow cavity of a supporting stand column, coarse adjustment of a fixed modulus is achieved by means of clamping of a trapezoidal limiting block and an adjusting limiting groove, the device is adaptive to different floor heights, and the fine adjustment assembly is in threaded meshing transmission; high-precision fine adjustment is achieved, the structure elevation error is effectively compensated, and the design does not need to be customized according to the specific height.