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Low-precision incremental encoder-based method for ultra-low speed control of servo system
PCT designated stage expiredWO2025091782A1Electronic commutation motor controlElectric motor controlLow speedLoad torque
Disclosed is a low-precision incremental encoder-based method for ultra-low speed control of a servo system. According to the present invention, a fast speed observer in an ultra-low-speed working state is achieved, only a sampling speed and load torque in an M / T method need to be observed, and position information of an electric motor does not need to be observed, such that the structure of the observer is simplified, and calculation is simple and fast; moreover, the influence of a friction force and cogging torque on a speed change is considered, such that the speed observation precision is further improved. The fast speed observer can reduce hysteresis and measurement dead zones, such that the speed response and the speed control precision in a low-speed working state are greatly improved, the problem in a traditional observer of a large position deviation caused by nonlinear factors such as an external load is avoided, improving the stability and robustness of the system. According to the present invention, the processing of sampling measurement time at a medium-high speed and the processing of switching the observer at a low speed in the M / T method can optimize the speed measurement precision at both the medium-high speed and the ultra-low speed, and can better satisfy the requirements of apparatuses such as a radar on rotating speed control.
Owner:LIANYUNGANG JARI ELECTRONICS CO LTD
Thread parameter measuring method based on machine vision
The invention discloses a thread parameter measuring method based on machine vision. The thread parameter measuring method comprises the following steps: S1, acquiring an image of a thread workpiece to be measured; s2, graying and preprocessing the collected image of the to-be-detected thread workpiece to obtain thread edge image features; s3, the thread edge image features are processed, thread parameters are obtained through calculation, and the thread parameters comprise seven main parameters and other parameters. The method has the following advantages: (a) the calculation difficulty is low, and the speed is high; (b) the adaptability is high, and the robustness is high; (c) the detection process is simple, and the measurement precision is high; (d) the measurement range is wide, and measurement of more parameters can be realized; the problems of complex measurement process, few measurement parameters, tedious method, high difficulty, poor adaptability, low calculation speed and the like in the existing detection technology are solved. The method can be applied to occasions related to thread parameter measurement.
Owner:HEBEI UNIV OF ENG
Intelligent discharging control method and system for battery and charging and discharging equipment
ActiveCN119401617AImprove charging efficiencyImprove experienceBatteries circuit arrangementsElectric powerElectrical batteryControl engineering
The invention relates to the technical field of batteries, in particular to an intelligent battery discharging control method and system and charging and discharging equipment, and the method comprises the steps that port insertion equipment carries out protocol identification, and the residual maximum power of current theoretical output is calculated according to the maximum output power; when the residual available power cannot meet the port power under the condition that the minimum output power of each port is reserved, other ports are distributed according to the reserved minimum power, and the sum of the minimum power of other ports is subtracted from the residual available power to obtain the actual output power of the port; and monitoring the actual discharge power of each port in real time, and limiting the maximum discharge power of other ports according to the actual discharge power. According to the intelligent power distribution method, the power output can be dynamically adjusted according to the power demand of the connected equipment, and each piece of equipment can be charged at the fastest speed to improve the charging efficiency.
Owner:SHENZHEN LEQI INNOVATION CO LTD
Mutant Taq Polymerase for Fast Speed Amplification
The invention includes a mutant Taq polymerase, which can significantly extend and amplify a target sequence where the extension conditions are time limited to as little as one second. The mutant Taq polymerase, or a biologically active fragment thereof, has one or more substitutions differing from the wild type as shown in Table I.
Owner:ABCLONAL SCIENCE INC
Robot leg structure capable of changing speed ratio and robot
The invention relates to the technical field of foot type robots, in particular to a robot leg structure capable of changing the rotation speed ratio and a robot. The robot leg structure capable of changing the rotation speed ratio comprises thighs and shanks, first speed changing and reducing parts are arranged on the shanks, and second speed changing and reducing parts for driving the first speed changing and reducing parts are arranged on the thighs; the variable-speed-ratio gear is arranged on the first variable-speed-reduction part and / or the second variable-speed-reduction part to form a leg variable-speed-ratio structure, so that the rotation speed ratio between the first variable-speed-reduction part and the second variable-speed-reduction part can be changed through meshing transmission of the variable-speed-ratio gear, and therefore when the robot is in a relatively upright state, the large rotation speed ratio can be provided, and the robot can be more stable in operation. The leg movement speed is high, so that the execution efficiency is high, the flexibility is high, and the speed is high; when the robot is in a squatting or sitting state, a small rotating speed ratio is provided, and therefore large output torque can be provided to meet the requirement of the scene needing large torque.
Owner:HANGZHOU YUSHU TECHNOLOGY CO LTD
Push chain type synchronous lifting platform and control method
The invention belongs to the technical field of mechanical lifting platforms, and particularly relates to a pushing chain type synchronous lifting platform and a control method.The synchronous lifting platform is formed by combining two lifting platform bodies, and each lifting platform body comprises a pushing chain driving system and a guiding mechanism; the multi-axis virtual axis electronic gear is combined with a fuzzy reasoning library to realize synchronous accurate control of the double servo motors, and the synchronous control system has the advantages of high speed, high bearing capacity, multi-point control, high precision, low initial height, large stroke, small occupied space, no maintenance, high efficiency, energy conservation and the like.
Owner:QINGDAO CHOHO IND CO LTD
Air suspension self-adaptive adjusting method and system based on road condition recognition and prediction
The invention discloses an air suspension self-adaptive adjustment method and system based on road condition recognition and prediction, and belongs to the field of air suspension adjustment. S1, parameters of an air suspension are initialized; s2, predicting road condition information of a road to be driven in real time; meanwhile, identifying the road condition information of the current driving road; s3, adjusting the height, rigidity and damping of the air suspension in combination with the predicted road condition information of the road to be driven and the identified road condition information of the current driving road; and S4, circularly executing the steps S2 to S3. By the adoption of the air suspension self-adaptive adjusting method and system based on road condition recognition and prediction, the height, rigidity and damping of the air suspension can be automatically adjusted according to the current road condition and the road condition of the road to be driven, the driving comfort and the driving stability of the vehicle are improved, and therefore the vehicle and passengers are protected; the system has the advantages of being high in universality and flexibility, low in maintenance cost, high in response speed, high in driving comfort and stability and the like.
Owner:GELUBO TECH CO LTD
Multifunctional push-pull jack
Owner:ZHEJIANG WINRAY DIGITAL TECH CO LTD
Smart home control method and device, remote controller and smart home system
PendingCN119356111AComputer controlProgramme total factory controlInterference resistanceRemote control
The invention discloses a smart home control method and device, a remote controller and a smart home system, and belongs to the field of smart home. Under a preset condition, a remote controller sends millimeter waves, the type and the position of indoor electrical equipment are obtained through the millimeter waves, and then after a first control instruction of a user is received, target electrical equipment which the user wants to control is determined and an execution action is executed; according to the scheme, the remote controller recognizes the type and the position of the indoor electrical equipment through the millimeter waves, then the control instruction is sent to the target electrical equipment through the millimeter waves, the remote controller does not need to be matched with the electrical equipment, and the operation is convenient. Users do not need to be paired and do not need to specially point to target electrical equipment, user operation is simplified, user experience is improved, millimeter wave communication is achieved, the anti-interference capacity is high, the transmission range is wide, the transmission speed is high, and control is stable and accurate.
Owner:GREE ELECTRIC APPLIANCE INC OF ZHUHAI
A circuit breaker
ActiveCN222749424UProtective switch operating/release mechanismsCircuit-breaking switch contactsControl theoryJumper
The utility model relates to a circuit breaker, including a base, a partition, an upper cover, an operating mechanism, an electromagnetic system and a leakage tripping mechanism, wherein the leakage tripping mechanism includes a leakage tripping device, the operating mechanism includes a handle, an L-pole contact seat, an L-pole moving contact arranged on the L-pole contact seat, an N-pole contact seat, an N-pole moving contact arranged on the N-pole contact seat, a lock and a tripping lock, in a closed state, a tripping rod extends out of an installation space, and when tripping, the lock rotates the tripping rod under the action of the electromagnetic system to retract the installation space, and the leakage tripping mechanism also includes a pull rod, the pull rod includes a fixed arm, a swing arm and a leakage pushing arm that are integrally formed or fixedly connected, and the fixed arm is connected to the lock. By adopting the above technical solution, the utility model provides a circuit breaker with a reasonable structural layout, flexible and smooth lock action, fast tripping speed, and a simple transmission structure between the leakage tripping device and the lock, good stability, and fast transmission.
Owner:ZHEJIANG AOELEC ELECTRICAL CO LTD
Circuit breaker
The utility model relates to a handcart type switching device for power supply or distribution, in particular to a circuit breaker. The circuit breaker comprises a fixed base, a mechanism box and a three-phase solid-sealed polar pole are arranged on the fixed base, an opening and closing mechanism for driving the three-phase solid-sealed polar pole to conduct opening and closing is arranged in the mechanism box, and the opening and closing mechanism comprises an electromagnetic mechanism and a permanent magnet maintaining mechanism which are integrated in the mechanism box and used for driving the closing action. An output shaft is arranged on a movable iron core of the electromagnetic mechanism, the permanent magnet holding mechanism and the repulsive force mechanism both act on the output shaft, so that each stage in the opening and closing process can be rapidly completed, the repulsive force mechanism is high in response speed, needed repulsive force can be rapidly generated, and the reliability of the opening and closing operation is improved. The permanent magnet holding force is overcome, rapid opening is realized, the opening time is shortened, and the opening speed is obviously improved.
Owner:HENAN PINGGAO GENERAL ELECTRIC CO LTD +1
Undercut detection method and device for high-speed rail tunnel construction and computer program product
The invention belongs to the technical field of tunnel construction detection, and discloses a high-speed rail tunnel construction undercut detection method and device and a computer program product in order to solve the problems of large workload and low data acquisition efficiency in the prior art. The laser can be directly scanned by a laser scanner without point-by-point measurement, so that the workload is reduced, and the detection efficiency is improved; meanwhile, the geometric state of the tunnel can be reflected by the three-dimensional point cloud data, and an accurate construction excavation section can be constructed during detection, so that the detection accuracy can be ensured; on the basis, the invention provides a tunnel under-excavation detection mode which is high in efficiency, low in workload and high in precision, so that the tunnel under-excavation detection method is very suitable for large-scale application and popularization.
Owner:NO 4 ENG CO LTD OF CHINA RAILWAY NO 3 ENG GRP +1
Method for calculating and processing optimized processing speed during path turning based on dynamic planning in numerical control system
The invention relates to a method for optimizing processing speed calculation processing during path turning based on dynamic planning by taking all moving axes in a three-dimensional space as objects in a numerical control system. The method comprises the following steps: judging whether a turning condition exists in a front-back moving instruction or not; the total turning duration T is calculated; determining the direction in which the jerk reaches the maximum value; calculating jerk in all moving axis directions; obtaining the time u of the acceleration increasing stage and the time p of the acceleration keeping unchanged stage in the turning process; calculating displacements in all moving shaft directions in the turning process; calculating the coordinates of A1; and calculating the coordinates of all the moving axes in each time period. According to the method, the device, the processor and the computer readable storage medium, the method, the device, the processor and the computer readable storage medium for calculating and processing the optimized machining speed during turning instruction implementation based on dynamic programming in a numerical control system are adopted, fastest machining during turning interpolation is achieved, the speed is high, precision is high, processing is simple, the adaptability to changes of input parameters and instruction parameters is high, and practicability is high.
Owner:BOTAI AUTOMATION TECH (SHANGHAI) CO LTD
Mould synchronous control method and system of slip form paver in stepping process
PendingCN119686194ARoads maintainenceControllers with particular characteristicsSynchronous controlControl engineering
The invention discloses a mold synchronization control method and system for a slip-form paver in a stepping process, and the method comprises the steps: firstly obtaining the forward displacement of a vehicle body of the slip-form paver and the actual backward displacement of a mold in the stepping process in real time; double-closed-loop PID control is carried out based on the forward displacement of the sliding mode locomotive body and the actual backward displacement and the actual backward speed of the mold, a target adjustment value of the backward speed of the mold in each control period is obtained, and finally a target adjustment value of the input current of the mold driving motor is obtained through calculation based on the target adjustment value of the backward speed of the mold. And adjusting the input current of the mold driving motor based on the target adjustment value. By adopting the double-closed-loop PID control, accurate control over the speed and displacement of the mold in the stepping process is achieved, the synchronism of the displacement and speed of the mold and the sliding mode locomotive body in the stepping process can be guaranteed, and the beneficial effects of being high in response speed and high in stability and reliability are achieved.
Owner:CHINA RAILWAY CONSTR HEAVY IND
Urban vehicle evacuation pedal device for rail transit
The invention discloses a city vehicle evacuation pedal device for rail transit. The city vehicle evacuation pedal device comprises a sliding frame, a pedal and a connecting frame. The connecting frame is assembled on the sliding frame through the roller group, the pedal is connected with the sliding frame through the pin shaft, the first connecting rod and the second connecting rod, the pedal is connected with the connecting frame through the pin shaft and the gas spring, and the pedal is connected with the cam; the sliding frame is connected with one end of a first steel wire rope, and the other end of the first steel wire rope is connected with a cam. The sliding frame is connected with one end of a second steel wire rope, and the other end of the second steel wire rope penetrates through the pulley and then is connected with the pedal. The requirement for rapid escape of passengers from the passenger room door is met, meanwhile, the influence on the passenger door of an existing railway vehicle is small, and the passengers can get off the vehicle to escape at the shortest distance and the fastest speed under the condition of power loss and air loss.
Owner:NANJING KANGNI MECHANICAL & ELECTRICAL
Laser scribing system and laser scribing method
PCT designated stage expiredWO2025087075A1Laser beam welding apparatusLaser scribingMechanical engineering
A laser scribing system, comprising: a bearing mechanism (10), wherein a bearing region (111) for bearing a product (200) is formed on the surface of one side in a first direction; shaping devices (20) respectively arranged on two sides of the bearing region in a second direction, wherein at least a part of each shaping device can move relative to the bearing mechanism in the second direction so as to abut against the side surface of the product in the second direction, and the shaping devices arranged corresponding to the bearing region cooperate with each other to adjust the position of the product on the bearing region; and a flying device (30) and a flying driving device that are connected to each other, wherein the flying driving device can drive the flying device to move in a third direction, first laser can be emitted in the first direction by means of the flying device to scribe the product shaped by means of the shaping devices on the bearing mechanism, and the first direction, the second direction and the third direction intersect in pairs. Also provided is a laser scribing method. The scribing system can ensure that the position of a product before laser scribing is accurate, ensures the scribing precision, can control the flying device to fly at an extremely fast speed, has a fast scribing speed, and improves the scribing efficiency.
Owner:WUXI LEAD LASER INTELLIGENT EQUIPMENT CO LTD
Driving Assembly and Vehicle
The present disclosure relates to a driving assembly having a fixed gear, a fixed rack, a movable intermediate rack, a movable gear, and a transmission rack. The movable intermediate rack cooperates with the fixed gear such that the movable intermediate rack is capable of being driven to reciprocate when the fixed gear rotates clockwise and counterclockwise; the movable rotary shaft is rotatably fixed to the movable intermediate rack, and the movable gear cooperates with the fixed rack such that the movable gear is capable of reciprocatingly translating along an extension direction of the fixed rack when the movable intermediate rack reciprocates, and the movable gear is capable of rotating about the movable rotary shaft; and the transmission rack is capable of driving a member to be driven. The transmission rack cooperates with the movable gear such that the transmission rack is capable of being driven to reciprocate so as to move the member to be driven when the movable gear rotates clockwise and counterclockwise. In the driving assembly of the present disclosure, the combination of gears and racks enables the transmission rack to have a smaller size and move at a faster speed for the same movement distance.
Owner:ILLINOIS TOOL WORKS INC
Dust removal device for circuit board processing
The utility model relates to the technical field of circuit board processing, in particular to a dust removal device for circuit board processing, which comprises two clamping plate devices, each clamping plate device comprises a lifting cylinder, a motor, a clamping cylinder and a clamping plate, the motor is fixedly mounted above the lifting cylinder, and the clamping cylinder is fixedly mounted at the end of a rotating shaft of the motor. Clamping plates are fixedly mounted at the ends of inner rods of the clamping air cylinders, and air blowers are fixedly mounted at the tops of the two clamping plate devices. The clamping plate devices are arranged on the two sides of the conveying belt, the circuit board is clamped and then blown to remove dust, dust is automatically removed, speed is high, cost is low, dust is removed on an assembly line, the circuit board is rotated to remove dust, and machining efficiency is improved.
Owner:ANHUI YONGDA ELECTRONIC TECH CO LTD
Material lifting method of silicon wafer and silicon wafer
The embodiment of the invention provides a silicon wafer lifting method and a silicon wafer, and the method comprises the steps: completely cutting a crystal bar into silicon wafers through a cutting line, and controlling the silicon wafers to move upwards; and in the process of controlling the silicon wafer to move upwards, controlling the cutting line to alternately and circularly move in the positive and negative directions. According to the silicon wafer lifting method provided by the embodiment of the invention, the contact area of the silicon wafer clamping the cutting line is smaller by utilizing the characteristic that the wire bow of the forward and reverse routing is smaller than that of the one-way routing, so that the probability that the cutting line forms scratches on the surface of the silicon wafer in the lifting process can be reduced, the condition of wafer falling during lifting can be reduced, and the lifting efficiency of the silicon wafer is improved. The method has the advantages of fast speed increase, high surface quality of the prepared silicon wafer and small secondary damage.
Owner:LONGI GREEN ENERGY TECH CO LTD
Low-speed working vehicle collision early warning system and method for road area traffic perception and intervention
The invention belongs to the technical field of traffic intelligent perception, and particularly relates to a road area traffic perception and intervention low-speed operation vehicle collision early warning system and method, and the system comprises a data collection module, a data transmission module, a data processing module, a collision risk judgment module and an early warning information issuing module. Data used by the method are collected data of millimeter wave radar and camera detection equipment installed on a movable device, the method is convenient and rapid to use, real-time radar data is adopted, the method has the characteristics of high detection precision and high detection speed, real-time video data is adopted, the method has the characteristics of light weight and low deployment cost, and the method is suitable for popularization and application. And real-time sensing of vehicle position and size information, weather information and personnel position information can be realized through the edge calculation unit. And the constructor out-of-bound early warning module can judge the position information of the constructors according to the outer contour of the construction operation area and perform early warning prompt on the constructors exceeding the construction operation area, so that the possible interference of the constructors on traffic operation is reduced.
Owner:山西省智慧交通实验室有限公司 +1
A lightweight foldable scooter
The utility model discloses a lightweight foldable scooter, comprising a front wheel frame, a rear wheel frame and a seat frame, wherein the front wheel frame is provided with a front wheel, the rear wheel frame is provided with a rear wheel, and the seat frame is provided with a seat, the front wheel frame and the rear wheel frame are rotatably matched, the front wheel frame is composed of an arc frame arranged parallel to the front wheel and a front wheel mounting frame connected to the arc frame, the front wheel mounting frame is hingedly provided with a handle mounting frame, and a connecting bridge is provided on the side of the arc frames away from the front wheel. The technical solution provided by the utility model realizes the full-automatic folding of the scooter by driving the movement of multiple groups of connecting rod structures by an automatic push rod, and the folding speed is fast, the coordination of various components is perfect, the coordination of various connecting rod structures reduces manual operation, and the scooter can be erected after folding, which not only occupies a small space but is also convenient for towing.
Owner:永康市易乐车业有限公司
Power plant personnel safety equipment wearing detection method based on YOLO v5
The invention discloses a power plant personnel safety equipment wearing detection method based on YOLO v5. A YOLO method is combined with a monitor to standardize and supervise behaviors of workers in a power plant. The YOLO network is a neural network based on a convolutional neural network, the network is high in real-time performance and high in detection speed, the whole image is divided into grids for one-time target detection, the complex process of multiple times of convolution is avoided, efficient target detection is achieved, and the method is suitable for application needing real-time target detection. According to the method, the detection precision of safety equipment and constructors who do not wear the safety equipment can be effectively improved; meanwhile, response is made at the fastest speed, and the detection requirement for the wearing condition of the safety equipment under the complex condition of a power plant can be met; the safety of power plant workers is effectively protected, and warning for illegal behaviors is given in time; the manual inspection cost is reduced, and the equipment maintenance cost is reduced; and normal production and operation of a power plant are ensured.
Owner:CENT CHINA BRANCH OF CHINA DATANG CORP SCI & TECH RES INST CO LTD
Virtual simulation method of diesel engine movement mechanism considering rotating speed fluctuation
PendingCN120180729ADesign optimisation/simulationSpecial data processing applicationsLoad torqueGear wheel
The invention aims to provide a virtual simulation method of a diesel engine movement mechanism considering rotation speed fluctuation. The method comprises the following steps: acquiring structure and material parameters of a valve mechanism, acquiring contact parameters of the valve mechanism, acquiring cam lift data, acquiring rigidity damping parameters and structure parameters of a gear transmission system, and acquiring cylinder pressure data. The output torque of a gas distribution unit, the angular acceleration of a cam shaft and the angular acceleration and torque of each gear are predicted respectively, the load torque state is judged, the crankshaft rotation angular acceleration is predicted, and the crankshaft dynamic angular velocity and the angular velocity fluctuation quantity are calculated. All motion mechanisms of the diesel engine are included, all kinetic parameters of the motion mechanisms of the diesel engine can be predicted, and the prediction result is complete. The influence of crankshaft rotating speed fluctuation caused by the load on the kinetic parameters of the diesel engine movement mechanism is considered, and the prediction result better conforms to engineering practice. Complex mathematical theories are not needed, a common numerical method can be adopted for solving, the calculation scale is small, and the calculation speed is high.
Owner:HARBIN ENG UNIV
An indoor simulation device and method for a wheel to roll on an icy and snow-covered road surface
An indoor simulation device and method for a wheel rolling on an icy and snow-covered road surface. The temperature, humidity, and the surface temperature of the test piece in the experimental chamber are respectively collected by a temperature sensor, a humidity sensor, and an infrared temperature sensing device. Then, the start and stop of the snow-making system are controlled through a control box, so as to adjust the experimental environment to meet the conditions of simulating harsh winter driving conditions such as snowfall and freezing rain. Finally, the start and stop of the wheel rolling device are carried out. The snow-making system of this device has the advantages of good refrigeration effect, fast cooling speed, and can reach -196°C. At the same time, this device can simulate the process of a wheel rolling on the road surface during actual driving, and is used to evaluate various fast, effective, and environmentally friendly snow removal methods and the anti-slip performance of the road surface after the wheel rolls on the road surface indoors.
Owner:CHANGAN UNIV
Engine rotating speed compensation method for hybrid power excavator and hybrid power excavator
According to the method, a fuzzy subset is set according to the required torque, the current SOC value and the difference value between the engine rotating speed and the motor rotating speed, and the torque of an ISG motor is dynamically adjusted through a fuzzy control algorithm. The fuzzy control adopts a fixed fuzzy rule, so that a Q table is established through a Q learning algorithm, the compensation torque of the ISG motor is obtained, the final output torque of the ISG motor is determined to be the sum of the output torque of the fuzzy controller and the compensation torque output by the Q learning algorithm, and the torque output by the ISG motor is determined. According to the method, the advantage of high response speed of the torque of the motor is utilized, the difference value between the required torque and the actual torque is effectively compensated, the rotating speed fluctuation of the engine caused by overlarge change of the torque of the engine is avoided, and the fuel economy and the driving operation stability are improved.
Owner:JIANGSU XCMG CONSTRUCTION MACHINERY RESEARCH INSTITUTE LTD
A warp knitting imitating woven jacquard process production method, mesh and shoe upper
The invention relates to the field of weaving technology, and in particular to a warp knitting imitating woven jacquard process manufacturing method, mesh cloth and shoe upper, including a comb setting step, a warping step, a yarn threading step, and a weaving step. The invention not only has the appearance and texture of woven fabrics, a flat cloth surface, good drape and other advantages, but also has the advantages of warp knitting fabrics being crisp, good anti-loosening property, good extensibility, good dimensional stability, and not easy to have fringes. During weaving, due to the good anti-loosening property, the coil loosening defect caused by broken yarn and holes in weft knitting fabrics can be effectively solved. The invention has high output, low price, high speed, and the warp knitting fabric is not easy to have fringes, which can effectively solve the fringing defect of woven fabrics and break through the limitations of traditional processes.
Owner:SINCETECH FUJIAN TECH CO LTD
Portable folding 3D printer
ActiveCN119238954Asmall inertiamove fastManufacturing platforms/substrates3D object support structuresComputer printingElectric machinery
The invention relates to a portable folding 3D printer, and relates to the related field of 3D printing, the portable folding 3D printer comprises a base, a U-shaped frame rotatably mounted on the base, and two first sliding rails fixed in the base, first sliding blocks are slidably mounted on the two first sliding rails, and a mounting plate is fixed on the two first sliding blocks; a mounting plate is arranged on the base, a magnetic plate is detachably mounted on the mounting plate through bolts, a hot bed plate is adsorbed on the magnetic plate, a double-shaft motor is fixed between the two first sliding rails, two first tensioning pieces are further fixed in the base, and two conveying shafts of the double-shaft motor are connected with the two first tensioning pieces through first synchronous belts; a higher moving speed can be achieved through the driving mechanism, due to the fact that the motor of the structure is fixed to the frame, in a printing head D printer, a general motor is a maximum inertia source, when the motor does not move at the execution end in a following mode, the execution end has smaller inertia, and therefore the motor can adapt to the higher speed.
Owner:SOUTHWEAT UNIV OF SCI & TECH
Wing folding mechanism of amphibious cross-medium unmanned aircraft
The invention relates to the technical field of unmanned aircrafts, and particularly discloses a wing folding mechanism of a submarine-air amphibious cross-medium unmanned aircraft, which comprises a rack, one end of the rack is connected with a steering engine case, the middle part of the steering engine case is provided with a steering engine mounting groove, a steering engine is mounted in the steering engine mounting groove, a steering engine main shaft on the steering engine is connected with the middle part of a rotating rod, and the rotating rod is connected with the rotating rod. A first connecting rod is movably connected to one end of the rotating rod, a first electric telescopic rod is installed on the portion, on one side of the steering engine mounting groove, of the steering engine case shell, and a second electric telescopic rod is installed on the portion, on the other side of the steering engine mounting groove, of the steering engine case shell; compared with a common fixed-wing amphibious aircraft, the aircraft with the wings capable of being automatically folded has the advantages that the wings are folded to the back when entering water, the resistance of the aircraft entering water can be greatly reduced, and certain feasibility is achieved; compared with a four-rotor amphibious aircraft, the four-rotor amphibious aircraft is longer in endurance and higher in speed.
Owner:JIANGSU OCEAN UNIV
Centering positioning mechanism
The utility model discloses a centering positioning mechanism which comprises positioning blocks arranged in pairs, the positioning blocks are arranged on a guide rail sliding block, and the guide rail sliding block is arranged on a linear guide rail. The positioning blocks are connected with a ball screw assembly, the ball screw assembly is provided with a ball screw, the ball screw is provided with a left-hand thread and a right-hand thread, and the ball screw rotates to drive the paired positioning blocks to move in the middle at the same time or move away from the middle in the reverse direction. According to the centering and positioning mechanism, the positioning blocks are arranged in pairs to clamp the steel backing, the ball screw is driven to rotate, the ball screw is provided with the left-hand thread and the right-hand thread, the two positioning blocks can be driven to move in a centering mode at the same time or move away from the middle in the reverse direction, clamping and positioning of the steel backing are achieved, the positioning precision is high, and the positioning speed is high; rigid positioning is achieved through the ball screw, and reliability is high.
Owner:DEKEMO HUADA MECHANICAL DONGGUAN
Driving valve, damping valve device, shock absorber, suspension system and vehicle
The invention relates to the technical field of damping devices, in particular to a driving valve, a damping valve device, a damper, a suspension system and a vehicle. A first valve body in the driving valve is provided with a first fluid chamber, and the first fluid chamber is configured to be provided with conductive liquid; the first deformation part is connected with the first valve body, and the first deformation part covers the side, facing the overflow valve, of the first fluid cavity in a sealing mode; the magnetic mechanism is connected with the first valve body and is configured to drive the electrified conductive liquid to move towards or away from the first deformation piece, so that the first deformation piece deforms to control the overflow valve to act. The driving valve drives the conductive liquid to flow through Lorentz force, and has instantaneous response speed, so that the driving valve has the advantage of high response speed; the response speed of the driving valve is high, the first deformation piece moves towards the first valve body, and the first deformation piece can give the valve rod assembly opposite force away from the overflow valve to achieve operation such as rapid pressure relief or pressurization.
Owner:BYD CO LTD