144results about How to "Reduce speed" patented technology

The control method comprises the steps that the rotating speed of a high-temperature-stage inverter compressor is mainly comprehensively determined by the high-temperature-stage exhaust temperature, the high-temperature-stage condenser temperature, the high-temperature-side outlet temperature of an intermediate heat exchanger and the high-temperature-stage return air temperature; through dynamic adjustment of the first fuzzy PID controller, the working condition and energy efficiency of the high-pressure side of the system are optimized; the rotating speed of the low-temperature-stage frequency conversion compressor is mainly comprehensively determined by the temperature in the box, the real-time rotating speed of the high-temperature-stage compressor, the low-temperature-stage exhaust temperature, the temperature of the intermediate heat exchanger and the low-temperature-stage return air temperature, and the rotating speed is dynamically adjusted through the second fuzzy PID controller so as to ensure that the temperature in the box is accurate and stable and is matched with the high-temperature-stage capacity in real time. Through cooperative control of the parameter groups, the problems of low efficiency and unstable operation caused by mismatching of two-stage capabilities of the cascade system are solved, and efficient, stable and reliable operation of the system under all working conditions is realized.

The invention belongs to the technical field of anhydrous magnesium chloride production, and particularly relates to a preparation process of anhydrous magnesium chloride, which comprises the following steps: firstly, dissolving magnesium chloride hexahydrate in absolute ethyl alcohol to form a magnesium chloride ethanol aqueous solution, and then dehydrating the magnesium chloride ethanol aqueous solution by using a molecular sieve to obtain the magnesium chloride ethanol solution; carrying out secondary cooling, stirring crystallization, secondary solid-liquid separation and vacuum drying on the magnesium chloride ethanol solution to obtain high-purity anhydrous magnesium chloride; and recycling ethanol liquid obtained by solid-liquid separation and ethanol gas obtained by vacuum drying. The technical scheme provided by the invention is simple in process flow, low in energy consumption, low in equipment requirement, high in product yield and high in purity, and can be directly applied to the fields of electrolytic preparation of magnesium, catalyst carriers and the like.

The utility model relates to a cold -air machine with adjustable pedestal, including cold -air machine body, the pedestal that is fixedly arranged below cold -air machine body, the pedestal includes the square board that is arranged below cold -air machine body, the adjusting device that is arranged on the square board, a plurality of support legs that are fixedly arranged below the square board, the wheel that is respectively arranged on a plurality of support legs, the adjusting device includes the first motor that is fixedly arranged below the square board, the first gear that is fixedly arranged in the first motor output, the second gear that rotatably arranged below the square board and is engaged with the first gear, the carousel that is fixedly arranged on the second gear, the drive mechanism that is arranged on the carousel is used to drive the up-and-down swing of cold -air machine body. Use this cold -air machine, and cold -air machine body can swing up and down while carrying on autogyration, two kinds of movement modes do not interfere with each other, realize compound air supply mode, significantly increase the coverage area and air disturbance of cold air, promote the mixing and diffusion of cold air and indoor hot air, accelerate the overall cooling speed.

The application belongs to the technical field of kitchen appliances, and particularly relates to a control method and device of an extractor hood and electronic equipment. The first offset displacement and the first vibration acceleration of a motor of the extractor hood are acquired, the vibration level of the motor is determined according to the first offset displacement and the first vibration acceleration, and the rotating speed of the motor of the extractor hood is adjusted according to the vibration level. The rotating speed of the motor is actively reduced, noise is avoided, vibration is inhibited, the abrasion and resonance effect of mechanical components are reduced, and the risk of structure loosening or part falling of the extractor hood caused by vibration is reduced.

The invention relates to the technical field of cashmere fabric spinning, and discloses a cashmere fabric spinning device with a broken end active positioning function and a using method thereof.The cashmere fabric spinning device comprises a rack, and a first electric shaft, a second electric shaft and a third electric shaft are arranged in the rack; a carding roller, a wool feeding roller and a rotating cup are fixedly installed at the end of the first electric shaft, the end of the second electric shaft and the end of the third electric shaft respectively, a conveying pipeline used for conveying fibers and an impurity sucking pipeline used for sucking impurities are arranged on the machine frame, and a yarn guiding pipe is fixedly installed on the machine frame. According to the spinning device, the rotating plate rotates to be in a vertical state by means of pressure of yarn on the pulleys, when the yarn breaks, tension of the yarn disappears, the pulley close to the broken side loses the pressure of the yarn firstly, the pulley drives the rotating plate to rotate towards the broken side of the yarn, and the rotating plate rotates to the broken side of the yarn. The two magnetic plates drive the two clamping plates to move relatively to be closed, and the magnetic rods are prevented from overturning downwards under the action of gravity.

The application relates to the technical field of flow channel cleaning, and discloses a dam water inlet flow channel floating object cleaning device which comprises a fixing plate arranged at a dam water inlet flow channel opening, a water inlet opening is formed in the fixing plate and communicates with the dam water inlet flow channel opening, a filter plate is arranged in the water inlet opening, fixed blocking strips are fixedly installed on the filter plate, a salvage mechanism for cleaning garbage and a driving mechanism for driving the salvage mechanism to work by using water flow are arranged on the fixing plate, the salvage mechanism comprises movable rods, limiting rods, U-shaped frames and a plurality of first arc-shaped fixed strips, a plug groove and a limiting groove are formed in the upper end of the fixing plate, and the movable rods and the limiting rods are movably installed in the plug groove and the limiting groove respectively. The dam water inlet flow channel floating object cleaning device aims to solve the problems that, in the prior art, accumulated floating objects in front of a dam are cleaned by manual work, the efficiency is low, there are hidden dangers, and tree branches are easily stuck on the filter screen under the impact of water flow and are difficult to clean.

The invention belongs to the technical field of motors, and discloses a dual-output motor assembly which comprises a shell, a planetary gear reducer and a clutch assembly, the two ends of the shell are connected with a front end cover and a rear end cover respectively, the inner wall of the shell is connected with a stator, a rotor is arranged in an inner cavity of the stator, and the rotor is provided with a first shaft; the planetary gear reducer is connected to the rear end cover and is provided with a second shaft and a third shaft; the clutch assembly comprises an electromagnetic coil and a sliding rod, the electromagnetic coil is fixed to the shell, one end of the sliding rod is located in the electromagnetic coil and provided with a first magnet matched with the electromagnetic coil, the other end of the sliding rod is slidably connected to the third shaft, and an elastic piece is arranged between the sliding rod and the third shaft so that the end face of the sliding rod can abut against the end face of the third shaft. The first shaft is in a first output direction and is used for outputting high rotating speed; the first shaft and the third shaft are connected through the clutch assembly, the rotating speed is reduced through the planetary gear reducer, and the planetary gear reducer serves as a second output direction and has the advantage of being multifunctional.

The utility model relates to the technical field of machining lathes, and discloses a cam transmission mechanism of a machining lathe, which comprises a screw rod, a pillow seat is sleeved on the screw rod in a threaded manner, a ram is mounted on the pillow seat and arranged on the lathe, a spline shaft is coaxially arranged at the end part of the screw rod, and the end part of the spline shaft is provided with a cam shaft. A rotating shaft is coaxially installed at the end, away from the lead screw, of the spline shaft, a motor is installed at the end of the rotating shaft, the rotating shaft is rotationally sleeved with a support through a bearing, and the support is installed on a lathe. The lead screw and the spline shaft are connected through an overload clutch mechanism. A cam transmission mechanism of a machining lathe solves the problems that in the prior art, when a cutter is abraded, the cutting effect of the cutter is poor, when a ram slides according to the running speed of a hydraulic cylinder, the abraded cutter can seriously affect the cutting speed of the cutter, and then the cutter is prone to being clamped when the ram runs. And both the motor and the hydraulic cylinder are damaged.

The utility model discloses a power transmission line bird repeller belongs to bird repeller technical field. A kind of power transmission line bird repeller, including the mounting frame of detachable connection on electric power tower, the top of mounting frame is provided with bird repelling component, bird repelling component includes rotating base rotation connection in the top of mounting frame, hemispherical cover body is fixedly connected on rotating base, the open end of hemispherical cover body is fixedly connected with reflector, friction block is slidably connected in rotating base, friction block and the circumferential surface of mounting frame are attached, rotating base is rotationally connected with force arm, one end of force arm is abutted with friction block, the other end of force arm is provided with counterweight piece;The utility model force arm cooperation friction block, so that the application can form passive deceleration effect under storm condition, friction block extrudes support rod to make rotating base rotation speed reduce, avoid hemispherical cover body fracture or bird repeller disintegration, prevent the problem of the appearance of the debris after disintegration threat power transmission line insulation safety.

This invention discloses a control method, storage medium, and air conditioner for silent operation of an air conditioner, belonging to the field of air conditioning control technology. The method includes: when the unit is in cooling mode, if a silent operation command is received, the following steps are executed: detecting the unit's low operating pressure; if the unit's low operating pressure is within a target low pressure range, then successively reducing the compressor frequency according to a set first gradient until the unit's low operating pressure after the compressor frequency reduction exceeds the upper limit of the target low pressure range; then controlling the compressor to operate at the frequency adjusted in the previous reduction; and detecting the unit's high operating pressure after the compressor operates at this frequency; if the unit's high operating pressure is within a target high pressure range, then successively reducing the outdoor fan speed according to a set second gradient until the unit's high operating pressure after the outdoor fan speed reduction exceeds the upper limit of the target high pressure range; then controlling the outdoor fan to operate at the speed adjusted in the previous reduction. Using this invention, while ensuring that the unit's basic capabilities meet requirements, the compressor frequency and outdoor fan speed can be further reduced, optimizing the silent operation effect.

This invention discloses a slitting device for producing narrow strips of aluminum, relating to the field of aluminum cutting technology. It includes a machine tool with a conveying unit assembly and a winding unit assembly. The conveying unit assembly conveys aluminum sheets, and the winding unit assembly winds the slit aluminum sheets into narrow strips onto the winding unit assembly. The machine tool also has a cutting unit located between the conveying unit assembly and the winding unit assembly. In this invention, by integrating the fan blade and the circular cutting blade onto the same primary drive shaft, the fan blade rotates synchronously with the blade to form a directional airflow. This airflow not only blows away electrostatically adsorbed debris from the blade surface, preventing the debris from scratching the aluminum sheet and increasing the defect rate, but also cools the blade, extending its service life.

The dryer includes a drum including a drum body, a front cover, a rear cover having an air inlet formed thereon, and a drum inlet communicating with an inside of the drum body through the front cover; a fixing panel separated from the rear cover; a motor including a stator and a rotor; a supply port including a plurality of supply holes in a ring shape on the fixing panel along an outer peripheral surface of the motor; a ring-shaped supply tube fixed to the fixing panel to guide air to the supply port, and including an accommodation portion accommodating the motor at a center thereof, a first cooling hole on the fixing panel, and a second cooling hole separated from the first cooling hole on the fixing panel; and a tube cover circulating air by connecting the first cooling hole, the accommodation portion, and the second cooling hole.

The application discloses a kind of single-blade card paddle working condition under wheel hub system limit load control method and system, this method is when wind turbine generator set normal operation detects whether blade is in card paddle state, when detecting card paddle failure, shutdown action is carried out, wind turbine generator set first enters load dynamic balance control mode, then calculates the current yaw error in shutdown process, yaw control is carried out to wind turbine generator set based on yaw error, so that wind turbine generator set is far away from directly facing wind direction, reduce the wind load of wind turbine generator set, and then reduce generator speed, when the load of wheel hub system of wind turbine generator set is less than preset threshold, wind turbine generator set carries out unified variable pitch rate feathering control, so that the load of wheel hub system meets design requirement, improve the safety of unit, and then reduce the design cost of wheel hub system.

This utility model relates to the technical field of thermal insulation and ventilation devices, specifically to a thermal insulation and ventilation device for low-carbon building roofs. It includes an insulation shell, an air inlet block fixedly connected to the top of the insulation shell, an air exchange cylinder fixedly connected to the outer side of the air inlet block, a rotating shaft rotatably connected to the top of the air exchange cylinder, two sets of rotating seats fixedly connected to the outer side of the rotating shaft, a rotating plate hinged to the inner side of the rotating seat, a protective groove formed on the inner wall of the rotating plate, a telescopic rod fixedly connected to the inner wall of the protective groove, a spring sleeved on the outer wall of the telescopic rod, and a friction head fixedly connected to the end of the telescopic rod away from the rotating seat. This utility model, through the cooperation of the insulation shell and the air inlet block, uses a centrifugal force rotating plate, friction head, and spring to automatically increase frictional resistance and reduce the speed of the ventilation fan blades when the wind force is too strong, preventing excessive entry of cold air in winter and achieving self-regulation of airflow. The ventilation fan blades are driven by a wind-inducing cup, achieving natural ventilation without electricity.

The application discloses a dry land corn seeding and film covering integrated machine and relates to the technical field of agricultural machinery. The machine comprises a rack, a processing mechanism arranged in the rack, a ploughing device, a ridger and a film covering frame fixedly installed on the inner wall of the rack, a seeding machine fixedly installed on the outer surface of the rack, a controller fixedly installed on the outer surface of the rack, a film discharging assembly arranged in the rack and a soil covering assembly arranged in the rack. The dry land corn seeding and film covering integrated machine is provided with a film discharging mechanism. When the device encounters hard soil blocks, instantaneous deceleration or temporary stop, the unwinding damping instantaneously increases, the roller shaft is difficult to rotate, the film is prevented from being continuously excessively pulled out, the film is prevented from being relaxed or accumulated due to the stop of the machine, the friction on the roller shaft is reduced when the device passes through the hard soil blocks or accelerates forward again, the film is allowed to be quickly pulled out, and the film is prevented from being torn due to excessive tension.

This invention discloses a method for expanding a desulfurization system and a method for reducing the resistance of its inlet and outlet air vents, belonging to the field of environmental protection and energy-saving production technology transformation. The device of this invention includes a desulfurization system comprising a desulfurization tower body and a ventilation unit. The desulfurization tower expansion unit includes a desulfurization tower body with a 3m height increase section added above the original spray layer, and an additional spray layer and a matching slurry circulation pump inside the tower. The ventilation unit includes a relocated kiln tail fan, with the fan inlet and the vertical air duct of the bag dust collector outlet coaxial, and the outlet coaxial with the desulfurization tower inlet. This invention achieves stable ultra-low SO₂ emissions from cement kiln tail flue gas through desulfurization system expansion, with an outlet concentration ≤35mg / Nm³, meeting the environmental performance level A requirements. It can solve the problems of existing desulfurization systems having many bends and large bending angles in the inlet and outlet air ducts, resulting in high system ventilation resistance and high reactive power consumption of the kiln tail fan, which is not conducive to the power consumption and energy consumption control of the production line.

The utility model provides a plug seedling transplanter clamping mechanism which comprises a moving assembly arranged on a transplanter body and a clamping assembly connected with the moving assembly, the clamping assembly comprises two clamping arms used for clamping plug seedlings and a driving unit used for driving the two clamping arms to move oppositely, one end of each clamping arm is connected with the driving unit, and the other end of each clamping arm is connected with the moving assembly. An arc-shaped clamping piece in separable contact with a plug seedling is arranged at the other end of the clamping arm, and the arc-shaped clamping piece is arranged at one end of the clamping arm in a swinging manner. According to the clamping mechanism of the plug seedling transplanter provided by the utility model, the positive and negative lead screws drive the arc-shaped clamping pieces on the clamping arms to slowly approach plug seedlings, and the sponge bosses are arranged on the arc-shaped clamping pieces to buffer the clamping of the arc-shaped clamping pieces, so that the clamping of the plug seedlings by the arc-shaped clamping pieces is more stable and reliable; the tray seedlings are flexibly buffered by the sponge bosses, so that the tray seedlings are prevented from being collapsed and broken due to stress concentration during clamping, and the clamping effect of the clamping mechanism on the tray seedlings is better.

The utility model provides a range hood which comprises a fan, an exhaust fume collecting hood with a bottom inlet and a fan frame, the fan is fixed on the fan frame and communicated with the bottom inlet, the forward side of the fan frame comprises a front cover plate, a ventilation opening is arranged on the front cover plate, an air inlet of the fan is positioned on the forward side, and the air inlet of the fan is communicated with the ventilation opening. The inner side of the front cover plate is connected with an adsorption module used for adsorbing volatile organic compounds, an adsorption inlet of the adsorption module is exposed out of the ventilation opening, the height of the adsorption module is larger than that of the center line of the air inlet, and a closed inner space is formed in the fan frame to communicate with the bottom inlet and an adsorption outlet of the adsorption module. According to the utility model, on one hand, pollutants are adsorbed, so that air flow purification is realized, treatment of pollutants such as VOCs in a kitchen is realized, and the problems of peculiar smell in the kitchen and the like are solved; and on the other hand, the negative pressure of a local area is improved, the problem that the flow speed of the whole area of the air inlet of the fan is uneven due to size reduction of the fan frame is solved, air volume is increased, and rotating speed and noise are reduced.

This utility model relates to the field of wood chipper technology, specifically to a hydraulically driven feeding wood chipper. The wood chipper body is equipped with a transmission assembly and a hydraulic feeding assembly. The transmission assembly includes a first pulley, a second pulley, and a hydraulic pump assembly. The hydraulic pump assembly includes a hydraulic pump and pulleys. The hydraulic pump's inlet pipe is connected to an oil tank assembly, and the hydraulic pump's output oil circuit is connected to the hydraulic motor's inlet via a solenoid directional valve. When the cutting shaft speed decreases, the feeding speed is reduced to prevent the crushing disc from getting stuck. Simultaneously, a speed detection controller is installed on the wood chipper body to detect the cutting shaft speed. When the cutting shaft speed is lower than a set value, the speed detection controller stops the hydraulic motor and stops feeding, minimizing the risk of the crushing disc getting stuck.

The application relates to the technical field of train emergency ramps, in particular to an electric recovery ramp system which comprises a box body, a rotating combination, a braking assembly and a clamping assembly. The box body is installed on a frame body and is provided with an outlet hole. The rotating combination comprises a lead screw, a first rotating piece, a second rotating piece and a first rope. The lead screw is rotatably installed on the box body, the first rotating piece and the second rotating piece are in threaded connection with the lead screw, one end of the first rope is wound on the first rotating piece, the other end of the first rope passes through the outlet hole and is connected with a pedal, and the braking assembly comprises a braking piece which is in abutment or separation with the second rotating piece. When the ramp is unfolded, the clamping assembly clamps the lead screw. When the pedal is turned down and the first rope is pulled, the first rotating piece rotates on the lead screw and is connected with the second rotating piece. Then the braking piece reduces the rotating speed of the second rotating piece and causes the speed of the pedal to be turned down to be reduced, so that the advantage of the buffer function is realized.

A grinding device suitable for a meat grinder comprises a material bowl, a blade assembly and a bowl cover assembly. The blade assembly is located in the material bowl, and the bowl cover assembly covers the material bowl. The bowl cover assembly is provided with an acceleration gear set, an input shaft of the acceleration gear set upwards extends out of the bowl cover assembly, an output shaft of the acceleration gear set extends out of the bowl cover assembly, and the output shaft of the acceleration gear set is assembled with the blade assembly in a transmission mode. According to the scheme, the speed increasing mechanism is additionally arranged in the grinding device, and low-rotating-speed and high-torque output of the meat grinder is converted into high-rotating-speed and low-torque output needed by grinding, so that the meat grinder can achieve the grinding function under the condition that an additional motor is not added.

A control device (50) of a motor generator (42) connected to an internal combustion engine (41) includes an estimation section (52) that estimates an estimated value of a torque ripple of the internal combustion engine, i.e., an estimated torque ripple, and a control section (53) that controls the motor generator to reduce generated power and suppress a decrease in a rotational speed of the internal combustion engine in a case where a negative torque that hinders rotation of the internal combustion engine occurs in the estimated torque ripple of the internal combustion engine.

This invention relates to the field of road speed bump technology, and more particularly to a retractable speed bump suitable for urban roads. It includes a triggering device, a force transmission device, a feedback device, and a recovery device pre-embedded in the road surface. The triggering device and the feedback device are spaced apart, with the force transmission device and the recovery device respectively located between them, and the recovery device positioned above the force transmission device. The triggering device includes a trigger block, trigger rods at both ends of the trigger block, and a compression spring damper located below the trigger block. The feedback device includes a retractable speed bump and fixed speed bumps on both sides of the retractable speed bump. The fixed speed bumps are fixedly connected to the asphalt surface layer by fixing pins. A tension spring damper is located below the retractable speed bump. This invention utilizes the lever principle and the cooperation of gears and rotating rods to achieve different driving experiences through speed control, reducing vehicle wear and increasing the driver's awareness of slowing down.

This utility model relates to the field of fishing tackle accessory manufacturing technology, specifically to an embedded automatic adjusting brake device and fishing reel with a reasonable structure and simple operation. It includes a spool and a spool bracket. The spool is mounted on the spool bracket via a rotating shaft, and the spool bracket also has a side cover. The key feature is the inclusion of a magnetic component, which includes a support sleeve coaxially arranged with the spool. One end of the support sleeve is connected to the side cover, and the outer wall of the other end of the support sleeve has a magnet fixing hole. The outer diameter of the support sleeve is smaller than the inner diameter of the spool drum. The end of the support sleeve extends into the spool drum. The magnet is slidably mounted in the magnet fixing hole via an elastic component. When the spool rotates, it cuts the magnetic lines of force around the magnet, causing the magnet to extend out along the magnet fixing hole, thus reducing the gap between the magnet and the spool.

The invention discloses a rotating disc type traditional Chinese medicine slicing machine. Comprising a machine box, a mounting frame, a mounting piece, a first assembling piece, an operation panel, a cutting table, a conveying assembly, a first connecting piece, a first linear driving assembly, a second connecting piece, a first adjusting piece, a telescopic support, a second adjusting piece, a second assembling piece, a driving piece, a third assembling piece, a rotating disc type cutting wheel, a third connecting piece and a pressure sensor. The servo driving module, the central controller and the closed-loop control module are integrated in the first assembly part. The pressure sensor is connected with the central controller through a CAN bus, an FFT algorithm is built in the central controller, and the rotating disc type traditional Chinese medicine slicing machine is matched with the telescopic support through the first linear driving assembly, so that the distance between cutters is flexibly adjusted, and the machining requirements of different medicinal materials are met; the pressure sensor is used for collecting stress data in real time, the central controller analyzes hardness characteristics and then synchronously adjusts the rotating speed of the driving piece and the displacement of the feeding assembly, and constant shearing force is maintained.

The utility model discloses a microbial fermentation device which comprises a tank body, a stirring frame and at least two layers of stirring paddles which are arranged in the tank body and are distributed along the axial direction of the tank body, and the microbial fermentation device has the beneficial effects that fermentation liquor in the tank body can be stirred and aerated through the matched use of the arranged stirring frame and an aeration main pipe, so that the dissolved oxygen transmission efficiency and the mixing uniformity are improved; meanwhile, by arranging the flow guide pipe with the jet flow direction opposite to the rotating direction of the stirring paddle, a reverse strong vortex field can be formed in the tank, so that gas-liquid two phases generate a shearing effect, the retention time of bubbles is prolonged, and the oxygen dissolving efficiency is improved, in addition, due to strong vortexes generated by reverse jet flow, the rotating speed of the stirring frame can be properly reduced; the shearing damage caused by high rotating speed is reduced, and the problems of insufficient dissolved oxygen, low viable bacteria rate and over-high energy consumption in the traditional fermentation device are solved.

The invention relates to the technical field of filling automation control, in particular to a cosmetic filling control method based on a large model knowledge graph, which comprises the following steps: acquiring an actual filling rate to determine a dynamic filling efficiency index, and determining whether the filling efficiency is stable based on the dynamic filling efficiency index. Determining the abnormal level of the filling efficiency in combination with the nitrogen filling response delay; determining that the filling efficiency is reduced due to the fact that moisture absorption raw material components are influenced by environmental factors to change the viscosity of a material body based on the combination of the viscosity-temperature sensitivity coefficient and the actual viscosity of a product and the environmental humidity, and adjusting a temperature set value of a compression area; the actual response time for adjusting the nitrogen flow is obtained to determine a response efficiency index, whether the comprehensive efficiency of nitrogen charging meets the expectation or not is determined based on the response efficiency index, and the calibration delay for determining the abnormal level of the filling efficiency is adjusted. The filling process is regulated and controlled on the basis of the product characteristics of cosmetics needing to be filled and the characteristics of filling equipment.

The utility model discloses an exoskeleton wearing equipment driving system in the field of exoskeleton driving, which comprises four driving mechanisms respectively positioned at a left hip joint, a right hip joint, a left knee joint and a right knee joint, each driving mechanism comprises a driving motor, and an output shaft of each driving motor and an input end of a reduction gear set are coaxially arranged. The output end of the reduction gear set is coaxially provided with a rotating shaft, the periphery of the rotating shaft is sleeved with a large gear, the end of the rotating shaft is provided with an action executing piece, the large gear is meshed with a small gear, the small gear and the rotary encoder are coaxially arranged, the reduction gear set is arranged in a protective shell, the driving motor is arranged on the protective shell, and the protective shell is fixed to the outer supporting plate through a fastener. A partition plate is arranged on the inward side of the outer supporting plate corresponding to the outer side of the large gear and the outer side of the small gear, an inner supporting plate is arranged on the outward side of the partition plate, a crossed roller bearing is arranged on the inner supporting plate, and the action executing piece is connected with an inner ring of the crossed roller bearing through a fastener. The utility model has the characteristics of compact structure and high precision.

The utility model provides a wafer overturning structure, which relates to the technical field of semiconductor processing, and comprises an overturning platform mounting plate and an overturning assembly, the overturning assembly comprises a motor arranged on the overturning platform mounting plate, the output end of the motor is provided with a rotating plate, the bottom of the rotating plate is fixedly provided with a cantilever, the cantilever is provided with an adsorption plate, and the adsorption plate is arranged on the overturning platform mounting plate. According to the utility model, the motor drives the rotating plate to rotate and drives the cantilever and the adsorption plate to realize wafer overturning, the parallel finger cylinder pushes the cylinder clamping plate to enable the centering clamping plate to move along the direction of the wafer so as to realize centering calibration of the wafer, and the first cylinder and the second cylinder are linked to adjust the telescopic stroke of the adsorption plate so as to adapt to different wafer sizes. The vacuum chuck is connected with an air channel through an air pipe connector to generate negative pressure to adsorb the wafer, then the motor is started, constant-speed rotation is achieved through the speed reducer, the cantilever drives the wafer to complete turning over, and therefore the wafers of different sizes can be turned over in a compatible mode.