88results about How to "Reduce positional deviation" patented technology

The invention relates to the technical field of machine tool parts, in particular to a numerical control machine tool tail end clamp quick-changing device capable of automatically adjusting the aim point, which comprises a machine tool connecting disc, a tool connecting disc and a circuit connecting port, a connecting block is connected to the tool connecting disc in a sliding mode, and a jacking air cylinder is fixedly connected to the tool connecting disc. An ejection block is slidably connected into the connecting groove, and an ejection air cylinder is also arranged in the connecting groove. The output end of the jacking cylinder pushes the connecting block; a positioning groove is formed in the tool connecting disc; the machine tool connecting disc is fixedly connected with a positioning block; the detection rod and the detection pressure sensor are arranged in the tool connecting disc to detect the position of the tool connecting disc relative to the machine tool connecting disc, and then the position of the tool connecting disc is adjusted to the center of the machine tool connecting disc through pushing of the fine adjustment block, so that when the machine tool connecting disc and the tool connecting disc are abraded, the position deviates after installation, and the tool connecting disc cannot be damaged. Adjustment can be carried out, so that the precision error is reduced.

The invention provides a mine hoist skip damping hook visual detection device which comprises a box body, upper hook plates are arranged on the two sides of the upper portion of the box body, and a sensor can be effectively protected against physical damage by arranging a buffer groove and a damping spring. The buffering and damping disc is matched with the fanning strip and the buffering groove to form a damping system, the buffering groove in the fanning strip provides insertion space for the sensor buffering rod, and the damping effect can be further improved. When vibration occurs, the damping disc and the structure thereof can disperse and absorb vibration energy, so that the sensor is protected from being damaged. The sensor mounting slot provides a stable platform for fixing the sensor, and ensures that the sensor can keep correct detection direction and position even under severe conditions. The combination of the linkage telescopic rod and the telescopic rod sleeve allows the sensor unit to flexibly displace within a certain range to adapt to the position change of the skip bucket hook, so that the sensor position deviation caused by equipment movement is reduced, and the detection precision is improved.

The utility model relates to an SE-TOPCon battery, and belongs to the technical field of photovoltaic battery manufacturing. Comprising a P + + region; the P + + area comprises four rectangular marks, four positioning patterns and a plurality of SE laser lines. Four rectangular marks, four positioning patterns and a plurality of SE laser lines are arranged, the SE laser lines are carved on the front face of an N-type battery silicon wafer in parallel at equal intervals, the four rectangular marks and the four positioning patterns are carved at the four corners of the front face of the N-type battery silicon wafer respectively, and the four positioning patterns are located on the inner sides of the four rectangular marks respectively. When silk-screen printing is carried out, after a silk-screen printing plate grabs four positioning patterns to carry out preliminary positioning on an N-type battery silicon wafer, a worker carries out accurate positioning according to the coverage degree of the silk-screen printing plate patterns on four rectangular marks and a plurality of SE laser lines, so that the position deviation of a plurality of metal grid lines and a plurality of SE laser lines is reduced; and the photoelectric conversion efficiency of the SE-TOPCon battery is improved.

The invention discloses a thin-wall weak-rigidity flat casing machining method which comprises the following steps that S1, a part is pressed and fixed to a clamp, then a preliminary outline of a precise hole set on a part mounting edge is machined step by step through drilling, hole burying and rough boring, and the rough boring machining amount is controlled within a set range; s2, the part is taken out of the clamp, the part is pressed and fixed again, in the pressing and fixing process, a layered uniform distribution pressing method is adopted to be matched with a torque wrench to press and fix the part layer by layer step by step, the torque wrench is controlled within the set torque, meanwhile, the maximum deformation amount of the part is checked in real time when a pressing plate presses each time, and the maximum deformation amount of the part is determined; it is ensured that the part deformation is controlled within the set run-out value; s3, a complete outline of a precise hole group on the mounting edge of the part is machined step by step through semi-fine boring, fine boring and reaming, and the reaming machining amount is controlled to be a set value; compared with the prior art, the position of the precise hole in the part mounting edge is accurate and reliable, and the machining qualification rate of the part is high.

The present invention discloses a quick-frozen food packaging device, which belongs to the technical field of food packaging, and comprises: a conveying box provided with a packaging machine body, a conveying mechanism, which is arranged in the conveying box, and the conveying mechanism comprises a driving component, a plurality of mounting plates, a plurality of fixing frames and a plurality of conveying components. The driving component is arranged in the conveying box, each mounting plate is arranged on the driving component, each fixing frame is arranged on the mounting plate, and each conveying component group is arranged on the fixing frame. The quick-frozen food packaging device can limit and guide the quick-frozen food according to its size through the cooperation of the conveying component and the limiting mechanism on the fixing frame, so as to prevent the driving force from not being in the middle of the quick-frozen food, so that the quick-frozen food is easily out of balance and stays on the conveying box, which affects the packaging efficiency of the quick-frozen food. Through the delivery mechanism, it can ensure that the quick-frozen food is accurately placed between the two fixing frames, reduce the position deviation, and affect the efficiency and accuracy of the subsequent packaging operation.

The invention discloses an outdoor high-hung display screen lens which comprises a support, a lens assembly, a light guide column, a supporting piece and a spherical surface, the light guide column in the lens assembly is embedded in a through hole formed in the support, the supporting piece is arranged at one end of the light guide column, and the spherical surface is fixedly connected to the supporting piece. The support is high in positioning precision and small in position deviation with the light source, the overall quality of a product is effectively improved, meanwhile, the first-stage light guide face arranged on the lens assembly transmits light of the received light source to the second-stage light guide face and the spherical face through the refraction and reflection principle, the second-stage light guide face conducts light mixing effect processing on the received light and then converges the light to the light emitting spherical face, and therefore the light emitting efficiency is improved. The whole support is designed to be black, stray light released by a light source is absorbed and shielded, light mixed and converged to the light emitting spherical surface is uniform in color and free of stray light, and meanwhile the light guide effect and the three-primary-color light mixing effect are effectively improved through the first-stage light guide face and the second-stage light guide face.

The invention discloses a motor shell inlaid steel sleeve machining device and a machining process thereof, comprising a base, a frame assembly is arranged on the top of the base, a feeding mechanism is arranged on one side of the frame assembly, the feeding mechanism comprises a support frame, an electric push rod and a connecting shaft, an inclined plate is fixedly connected to the bottom of the support frame, in the invention, an infrared transmitter and an infrared receiver are respectively installed at the bottom of the auxiliary plate and the top of the movable plate, which can assist in the position calibration of the motor shell and the steel sleeve, and can reduce the position deviation between the steel sleeve and the motor shell before installation, so as to ensure the accurate installation of the steel sleeve; the electric push rod and the inclined plate can assist in the stable lifting and lowering of the support frame, the flat gear can drive the movement and adjustment of the rack, and then control the automatic unloading of the limit sleeve, which can assist in the subsequent connection between the bottom of the steel sleeve and the motor shell; the guide bar can guide the movement of the movable plate, improve the stability of the movement of the movable plate, facilitate the position adjustment of the motor shell on the top of the base, and facilitate the unloading of the motor shell after processing.

The invention discloses a control method of a shielding mechanism, a detection system and computed tomography equipment, and relates to the technical field of medical treatment. According to the method, in the process of controlling the shielding mechanism to move to be aligned with the detector, the position deviation of the two ends of the shielding mechanism can be obtained, and the movement speed of at least one end of the shielding mechanism is adjusted based on the position deviation so as to reduce the position deviation. In this way, the positions of the two ends of the shielding mechanism can be kept synchronous, and therefore the problem that the shielding mechanism is damaged due to deformation of the shielding mechanism caused by too large position deviation can be effectively avoided.

The utility model discloses a rapid round steel butt joint device which is mainly composed of a shell, clamping mechanisms symmetrically arranged at the two ends of the shell and a driving mechanism located in the shell. The clamping mechanism is connected with the shell in a sliding mode through a connecting sliding block and comprises a base fixed to the connecting sliding block, a lower arc-shaped base and an upper arc-shaped base on the base are connected in a hinged and threaded mode, and a clamping screw and an arc-shaped pressing block are arranged to stably clamp round steel. The driving mechanism comprises a driving rack fixed to the connecting sliding block, a driving gear meshed with the driving rack and connected with the driving rack through a rotating shaft, and a rotating disc. According to the device, through the ingenious structural design, on the aspect of butt joint precision, position deviation can be effectively reduced, the butt joint coaxiality of round steel is improved, and the high-end manufacturing requirement is met; in terms of working efficiency, the position of round steel can be rapidly adjusted, and working time is shortened; and in the aspect of safety, the round steel is prevented from sliding off, the device adapts to complex operation environments, and the remarkable application value in industrial production is achieved.

The utility model discloses punching equipment for automobile fender machining, and belongs to the technical field of automobile fender punching, a hole in the side wall of a fastening rod right faces a through groove in the side wall of a top seat, and a lateral limiting rod penetrates through the hole in the fastening rod and is fixed to the top seat through a fastening nut. The sliding rod, the limiting rod, the fine adjustment base and the punching rod are all finely adjusted through the fastening rod and the lateral limiting rod, and then the position of the punching rod is adjusted so that the punching rod can be aligned to the automobile fender strip hole opening position. The fine adjustment structure allows an operator to finely adjust the position of the punching rod, it is ensured that the punching rod can accurately fall at the preset position every time punching is conducted, the position deviation is greatly reduced, and the punching precision is improved. And secondly, the flexibility and adaptability of punching operation are enhanced through a fine adjustment structure. Different punching positions and hole diameters may be needed for different automobile fenders. And through the fine adjustment structure, an operator can easily adjust the punching rod so as to meet different punching requirements.

The utility model relates to the technical field of lithium ion battery manufacturing, in particular to a welding positioning assembly and welding equipment. The welding positioning assembly comprises a base, a welding bottom block and a positioning piece, the welding bottom block and the positioning piece are arranged on the base, a positioning groove is formed in the positioning piece, the positioning piece is connected with the welding bottom block through the positioning groove, and a containing area is formed in the area, not covered by the positioning piece, of the welding bottom block; a battery cell to be welded and a cover plate to be welded are placed in the placing area, and a tab of the battery cell and the cover plate can abut against the positioning piece so as to position the tab and the cover plate. The welding positioning assembly can solve the problems that in the prior art, the positioning precision of a tab and a cover plate is poor, and position deviation is prone to occurring.

The utility model provides a telescopic portable catalyst bed positioner, which belongs to the technical field of small and medium-sized experimental devices and comprises a telescopic device, a horizontal positioner is mounted at the bottom of the telescopic device, an infrared distance meter is mounted on the surface of the telescopic device, and a gradienter is mounted on the surface of the infrared distance meter. According to the utility model, the actual position of the catalyst bed layer can be quickly and accurately determined in the catalyst filling process, the influence caused by defects of equipment and human measurement errors is reduced, the actual filling position and the measurement value are kept consistent, the position deviation is reduced, and the positioning accuracy of the catalyst bed layer is improved; accurate catalyst bed layer positioning is the basis of a subsequent catalyst evaluation experiment, by means of the positioner, it can be ensured that the actual filling position and the measured value are kept consistent, the filling time of the catalyst can be effectively shortened, the actual installation height of the catalyst can be accurately measured, and a solid and reliable basis is provided for the subsequent catalyst evaluation experiment.

An iron tower component hydraulic corner cutting self-adaptive limiting frame comprises a pressing die and a positioning die, the limiting frame is arranged on the positioning die, the limiting frame comprises an abutting block, an opening of the positioning die is in a U shape, an L-shaped notch is formed between the abutting block and the positioning die, and angle steel can be inserted into the L-shaped notch. The abutting block abuts against the angle steel after the angle steel enters the positioning die, and the abutting block retreats to the other end face after the angle steel is sheared by the pressing die. The angle steel shearing device has the advantages that geometric constraint is formed through matching of the U-shaped opening and the L-shaped notch, the three-dimensional positioning accuracy of angle steel in the shearing process is guaranteed, and position deviation can be reduced compared with a traditional manual positioning mode.

The utility model relates to a film blocking mechanism convenient to adjust, which comprises a guide beam and a positioning rod which are fixedly connected with a machine body, an adjusting mechanism is arranged on the guide beam, and a rotating component is arranged on the positioning rod. According to the film blocking mechanism convenient to adjust, through the arranged adjusting mechanism and mutual cooperation of a fixing base, a butt joint block, a jacking block, a rapid handle and a vertical film blocking rod on a guide beam, when a packaging machine is used, fixing of different film coiled material blocking films can be met, meanwhile, rapid adjustment can be achieved, and the packaging machine is convenient to use. In the process, the vertical film blocking rod is stopped at a proper position according to the size of the film coiled materials, so that the film coiled materials with different specifications can be quickly adjusted in the film blocking process, the possibility of position deviation of the film during use is reduced, the use quality of the film is improved, and the packaging efficiency is improved; and the film coiled material body can roll at a constant speed, so that the practical performance of the packaging material supply system of the packaging machine can be improved.

The utility model discloses a cleaning and disinfecting device for a calcium acetate oral solution bottle, and relates to the field of solution bottle cleaning. The cleaning and disinfecting device for the calcium acetate oral solution bottle comprises a cleaning machine body, a bracket table is arranged outside the cleaning machine body, a stabilizing mechanism is arranged outside the bracket table and comprises a supporting frame, the supporting frame is arranged above the bracket table, the supporting frame limits movement of the oral solution bottle, a rotating rod is rotationally arranged in the supporting frame, and the rotating rod rotates around the bracket table. The pushing plate is slidably arranged in the supporting frame and used for stably pushing the oral liquid bottles into the cleaning machine body. According to the cleaning and disinfecting device for the calcium acetate oral solution bottle, the cleaning fixing frame can be stably pushed forwards through the pushing plate, the supporting frame can limit the two sides of the cleaning fixing frame, and the rotating rod is arranged in the fixing frame, so that friction resistance generated between the oral solution bottle and the supporting frame can be avoided.

This application belongs to the field of robot control technology, and relates to a robot control method, device, computer equipment, and storage medium, including: acquiring a target station to be reached by the robot; determining an initial planned path for the robot to reach the target station based on the target station; scanning multiple reflective pillars preset on the initial planned path to obtain multiple point cloud data of the multiple reflective pillars, with one reflective pillar corresponding to a set of point cloud data; adjusting the initial planned path based on the multiple point cloud data to obtain a target planned path; controlling the robot to reach the target station based on the target planned path; acquiring a target material to be grasped by the robot; controlling the robotic arm to photograph a preset QR code on the target material at the target station to obtain a QR code image; determining the movement compensation value of the robotic arm based on the QR code image; and controlling the robotic arm to grasp the target material based on the movement compensation value. This application effectively improves the handling accuracy of composite handling equipment in material handling.

The invention discloses a water depth measuring device for water conservancy and hydropower, and provides the following scheme: the water depth measuring device comprises a vertical rod, the bottom of the vertical rod is provided with an adjusting mechanism and a moving mechanism, the vertical rod is internally provided with a lifting mechanism, the lifting mechanism is provided with a lap joint mechanism, the lap joint mechanism is provided with a pull rope mechanism, and the pull rope mechanism is provided with a pull rope. A positioning mechanism is arranged on the pull rope mechanism, and a measuring instrument main body is mounted on the positioning mechanism; by arranging the adjusting mechanism and the moving mechanism, during use, a grip can be held to pull the placement seat, so that the placement seat moves back and forth, further, a turntable can be manually held and rotated, the turntable drives the vertical rod, the vertical rod rotates in the placement seat through a rotating block, and the vertical rod can rotate along with the rotation of the vertical rod; the auxiliary device is arranged on the base and drives equipment on the auxiliary device to rotate together, the throwing angle of the equipment can be adjusted conveniently, the position and angle of the whole auxiliary device can be adjusted conveniently, the throwing range of the water depth measuring instrument is widened, and then the measuring range is widened.

The utility model relates to the technical field of tar precipitators, and provides a suspension device applied to an electrical tar precipitator, which comprises a suspension bracket, a support plate fixedly mounted on one side of the suspension bracket, an adjusting component mounted on the support plate, a connecting plate fixedly mounted on one side of the suspension bracket, a precipitation tube fixedly mounted on one side of the connecting plate, and a connecting plate fixedly mounted on the other side of the precipitation tube. According to the corona wire body mounting device, in the process of mounting a corona wire body, firstly, a clamping block at the top of a connecting rod penetrates through a through groove to enter the fixing box, and then the corona wire body is mounted in the fixing box; the clamping block pushes the sliding block to move towards one side of the spring through the elastic effect of the spring in the moving process, when the clamping block moves into the clamping groove, the sliding block is pushed to move towards the other side of the spring through the reset effect of the spring, the clamping block is clamped into the clamping groove, and therefore the corona wire body is rapidly and stably installed, and installation is convenient and easy.

The application relates to a flexible connecting device of a ball screw pair, belonging to the ball screw field, which comprises a rack, a connecting rod and a guide square rod, both ends of the guide square rod are sleeved with adjusting blocks, the adjusting blocks are provided with turnover assemblies for adjusting the overturning angles of the guide square rods, the turnover assemblies and the adjusting blocks are connected through rotating assemblies, the rotating assemblies are used for adjusting the overturning angles of the guide square rods, the turnover assemblies are provided with fixing assemblies for adjusting and fixing the overturning angles of the guide square rods, the rack is provided with adjusting assemblies for adjusting the positions of the adjusting blocks, the adjusting assemblies correspond to the adjusting blocks one by one, and the connecting rod is connected with the guide square rod through rolling pieces. The application has the effects of reducing the track deviation of a screw nut and causing mechanism abrasion, and prolonging the service life of the ball screw pair.

The invention discloses a method for compensating the installation error of the Hall sensor in a permanent magnet synchronous motor, comprising: firstly, using a constant voltage-frequency ratio control method to put the motor in a uniform speed operation state, and then dividing one cycle into six sectors through six rotor positions detected by the Hall sensor, and calculating an absolute reference position through a controller to correct the absolute deviation of three Hall sensors. The compensation amount is found through the obtained absolute deviation, thereby indicating the actual position of the rotor, and reflecting all the information of the absolute error by selecting three consecutive sectors, expressing the complete absolute position deviation correction equation by establishing a minimum variance estimation, and measuring the corresponding time by a timer of the controller to calculate the relative position deviation, thereby performing position compensation. This method can reduce the harmonic content of the current, improve the sinusoidality, accurately obtain the actual position of the rotor, and improve the sinusoidality of the current.

The utility model discloses a welding tool. The welding tool comprises a support, a Y-axis adjusting module, a Z-axis adjusting module and a welding module. The Y-axis adjusting module is mounted on the bracket; the Z-axis adjusting module is installed on the Y-axis adjusting module, and the Z-axis adjusting module is driven by the Y-axis adjusting module to slide in the Y-axis direction; the welding module is installed on the Z-axis adjusting module, and the welding module is driven by the Z-axis adjusting module to slide in the Z-axis direction. The welding module can be adjusted in the Y-axis direction and the Z-axis direction through the Y-axis adjusting module and the Z-axis adjusting module, the position deviation generated between the battery cell pole and the pressing nozzle of the welding module in the assembly line conveying process is reduced, the welding precision is high, the problem of welding deviation is solved, and the production efficiency is improved. And the welding penetration depth and welding width parameters can be stabilized.

The invention discloses a method for generating atmospheric environment parameters of an aircraft full orbit. The method comprises the following steps: acquiring an aircraft orbit information set and position coordinates of aircraft orbit sampling points; the aircraft orbit information set comprises aircraft orbit range information, aircraft orbit potential height information and latitude information; carrying out sampling processing on the aircraft orbit range information to obtain a discrete height value set and a discrete grid point set; obtaining a discrete height layer meteorological element value set; the discrete height layer meteorological element value set comprises a meteorological element value of each discrete height; and on the basis of the aircraft orbit information set, the discrete height layer meteorological element value set and the discrete grid point set, performing prediction processing on atmospheric environment parameters of the aircraft orbit sampling points to obtain atmospheric environment parameter prediction values of the aircraft orbit sampling points.

The utility model discloses a component analysis device for rare earth oxides, which relates to the technical field of component analysis for rare earth oxides and comprises an analysis instrument body, a laser and an optical fiber are mounted at the upper end of the analysis instrument body, the optical fiber is supported by a support, and the other end of the optical fiber is focused on the surface of a sample. A base is arranged on one side of the upper end of the analytical instrument machine body, and a middle rod is fixedly arranged at the upper end of the base. According to the utility model, the position of a sample to be detected is limited by arranging the limiting block on the discharging plate, and the two groups of oppositely arranged springs are utilized to promote the bottom block to drive the positioning head to be close to the two sides of the sample, so that the sample is positioned, the sample can be ensured to be positioned at the same position every time the sample is placed, and the position deviation caused by manual adjustment is reduced; in combination with upward sliding of the sleeve, the ejector rod drives the push block to push the corresponding bottom block outwards, so that the sample is convenient to take.

The application relates to a slitting machine for processing corrugated paper, which comprises a frame body, a conveyor for conveying the corrugated paper arranged on the frame body, a guide mechanism, a slitting unit, a fixed seat arranged on the conveyor, a rotating frame arranged in the fixed seat, a plurality of electric push rods arranged along the length of the rotating frame, a mounting head arranged at the bottom end of the piston rod of the electric push rod, a slitting blade arranged on the mounting head, one end of the slitting blade being downwardly inclined, and a driving element arranged on the fixed seat. The application can control the lifting of the slitting blades in different positions and quantities through the electric push rod and the mounting head, the number of times and the slitting width of the corrugated paper in single slitting can be conveniently changed, different slitting requirements can be met, the universality and applicability of the equipment are improved, meanwhile, the adjustment of the slitting blade is convenient and fast, complicated dismounting and reinstallation operations are not needed, and the production efficiency is improved.

The invention relates to the technical field of drilling of crane accessories, and discloses drilling equipment and a drilling process for production and machining of crane accessories. The drilling equipment comprises a machining table, and the machining table is provided with a rotating mechanism, a fixing mechanism, a collecting mechanism and an adjusting mechanism; and the rotating mechanism comprises a rotating limiting groove, a rotating sliding block, a rotating table, a first worm gear ring, a first supporting plate, a first worm, a first motor and supporting legs, the rotating limiting groove is formed in the machining table, the rotating sliding block is rotationally connected to the inner wall of the rotating limiting groove, and the rotating table is fixedly connected with the rotating sliding block. All parts on the rotary table rotate, so that a fixed plate-shaped accessory can be driven to rotate, the machining flexibility is improved, different parts of the accessory can be drilled under the condition that the accessory is not clamped again, and the complex design requirement is met.

The invention provides a bag storage bin and a bag taking mechanism, and relates to the technical field of prefabricated bag storage mechanisms of packaging machines. The bag storage bin and bag taking mechanism comprises a bag storage bin mechanism body, the bag taking mechanism body and a belt conveying mechanism, the bag storage bin mechanism body comprises a bag bin support, driving shafts are fixedly arranged at the positions, close to the lower ends, of the two sides of the bag bin support through plummer blocks, the driving shafts are connected with driving synchronizing wheels through keys, and driven shafts are fixedly arranged at the positions, close to the upper ends, of the two sides of the bag bin support. A horizontal bag bin is changed into a vertical bag bin through a mechanical transmission mode of combining a servo motor with a synchronous belt, a connecting rod and negative pressure belt conveying, the space is greatly saved, the workshop layout is optimized, meanwhile, the bag bin is arranged at a sealing position, a connecting rod mechanism is used for taking bags, the bag taking speed is increased, the negative pressure belt conveying mechanism is used, and the bag taking efficiency is improved. The position of the bag can be accurately controlled, the mechanical position does not need to be changed during model changing, convenience is achieved, and production efficiency and equipment stability are greatly improved.

A method for compensating installation errors of Hall sensors in a permanent magnet synchronous motor under disordered sequence includes the following steps: by energizing the three-phase stator windings in sequence and presetting a certain time, the back electromotive force of each phase is measured; the position of the rotor is obtained according to the back electromotive force value of each phase obtained in step 1; the value of the Hall sensor transferred to the corresponding sector is measured by injecting a fixed SVPWM, and the correct order of the Hall sensor is determined by the values ​​of the six groups of Hall sensors in step 3; when the motor starts normally, the position deviation of the Hall sensor is compensated. This method solves the problem that the Hall signal detects a rotor position that is inconsistent with the actual position due to the disordered sequence of the Hall sensor of the motor, and the rotor cannot be transferred to the corresponding sector and cannot start normally; through the position deviation compensation method of the Hall sensor, the sinusoidality of the current can be improved, the position deviation of the Hall sensor can be reduced, and the harmonic content of the current can be reduced.

The utility model belongs to the technical field of jacking positioning mechanism, especially relate to a tray jacking positioning mechanism, including hollow mounting seat, jacking plate and buffer structure, the inner chamber of hollow mounting seat is equipped with thin type air cylinder, a plurality of linear bearings and the bearing bar of sliding fit with linear bearing, buffer structure includes the several cylindrical elastomers of jacking plate top. When receiving the material, thin type air cylinder drives jacking plate to rise in vertical direction through piston rod, the top surface of jacking plate is indirectly contacted with the bottom surface of tray through buffer structure, positioning pin inserts the positioning hole in tray, utilizes indirect contact to avoid the top surface of jacking plate to wear and tear in the working process, is favorable to improve the service life of jacking plate, and utilizes buffer structure to buffer the impact force of piston rod and pushes out, and then greatly reduces the position deviation of tray due to vibration, is favorable to improve the positioning accuracy.

The utility model relates to the technical field of printing coiled material winding and unwinding, and discloses a printing coiled material winding and unwinding assembly which comprises a supporting frame, a first mounting frame is fixedly mounted on the supporting frame, a rear transition roller is rotatably mounted at the end, away from the supporting frame, of the first mounting frame, and a fixing seat is fixedly mounted on the supporting frame. A transmission seat is fixedly installed at the end, away from the supporting frame, of the fixing seat, and a rear driving roller is fixedly installed at the output end of the transmission seat. According to the winding and unwinding assembly for the printing coiled material, the air cylinder drives the mounting rod to drive the tensioning roller to move up and down, the tension of the printing coiled material can be dynamically adjusted, when the tension of the coiled material fluctuates due to winding and unwinding diameter changes, the air cylinder can keep the coiled material in a tensioning state in real time through air pressure compensation, and the loosening or over-tightening phenomenon is avoided; and the tensioning assembly is located between the rear driving roller and the upper driving assembly, a transmission path from driving to tensioning and then driving is formed, and tension fluctuation of the coiled material in the transmission process can be effectively decomposed.