3568results about How to "Reduce contact area" patented technology

The invention relates to the field of sampling, in particular to a drilling and sampling device for road construction. The sampler comprises a frame and a sampling assembly arranged on the frame, the sampling assembly comprises a drilling cylinder and an inner cylinder, a plurality of drilling tools are hinged to the lower end of the drilling cylinder, the inner cylinder is coaxially inserted into the drilling cylinder, the inner cylinder is of a grating structure and comprises a first cylinder body and a second cylinder body, and a film is arranged in the inner cylinder. When a road surface part is drilled, the drilling tool is in a horizontal state, the contact area between the drilling tool and the road surface is large, large cutting supporting force can be kept, a drilling barrel is prevented from being stressed and deformed, when a roadbed part is drilled, the drilling tool is in an upright state, the contact area between the drilling tool and the roadbed is small, the cutting speed is increased, and the cutting efficiency is improved, so that different drilling requirements are met; meanwhile, when the roadbed part is cut, the inner cylinder is inserted into the roadbed in advance to support the roadbed, after drilling is finished, the thin film is pulled open to wrap the sample core, it is guaranteed that the distribution state of all layers of structures of the sample core is accurate, and the authenticity of the sample is guaranteed.

The utility model belongs to the technical field of frame dismounting devices, and relates to a photovoltaic module frame dismounting device capable of self-adapting to glass breaking of various sizes, which comprises a working table, and a long-edge frame dismounting mechanism and a short-edge frame dismounting mechanism which are respectively arranged on the working table, the long-side frame disassembling mechanisms and the short-side frame disassembling mechanisms are arranged in pairs, the paired long-side frame disassembling mechanisms are distributed at the positions close to the long sides of the photovoltaic panel frame in a mirror image mode relative to the central position of the workbench, and the long-side frame disassembling mechanisms downwards press the photovoltaic panel and then outwards push out the long sides of the photovoltaic panel frame. The paired short-edge frame disassembling mechanisms are distributed at the positions close to the short edges of the photovoltaic panel frame in a mirror image mode relative to the central position of the workbench, and the short-edge frame disassembling mechanisms downwards press the photovoltaic panel and then push the short edges of the photovoltaic panel frame outwards. According to the utility model, the paired long-side frame dismounting mechanisms and the paired short-side frame dismounting mechanisms are respectively arranged, so that the four frames are dismounted, the cutting of four corners is not needed, the frame dismounting operation is simple, and the reutilization rate of the frames is improved.

The invention discloses a Janus structure photo-thermal fabric with adjustable wettability and a preparation method and application thereof, and belongs to the technical field of solar interface water evaporation. According to the wettability-adjustable Janus structure photo-thermal fabric, a hydrophobic carbon fiber fabric serves as a substrate, a hydrophilic layer is arranged on one side of the hydrophobic carbon fiber fabric, a hydrophobic layer is arranged on the other side of the hydrophobic carbon fiber fabric, the hydrophilic layer is a deposited CuS layer, and the hydrophobic layer is a non-deposited CuS layer. And the hydrophilic layer with radial pores is formed by connecting CuS nanosheets grown on the surface of the hydrophobic carbon fiber fabric in a staggered manner. The problems that in the evaporation process of an existing two-dimensional evaporator, due to water energy imbalance, heat loss and evaporator surface salt deposition are caused, and due to the fact that light absorption and water transmission of the evaporator coexist in the same space, inevitable mutual influence is caused can be solved, and the efficient and long-term stability of the evaporator is improved.

The invention discloses a composite carbon source for sewage treatment and a preparation method thereof, and belongs to the technical field of sewage treatment.The composite carbon source is of a three-layer core-shell structure, an outer shell layer of the composite carbon source is a polyvinyl alcohol / corncob powder composite material, an inner shell layer of the composite carbon source is a corn starch / polyvinyl alcohol / corncob powder composite material, and a core layer of the composite carbon source is an activated carbon loaded chitosan material. The shell layer is formed by mixing polyvinyl alcohol and corncob powder, so that the contact area of the corncob powder and sewage treatment bacteria is reduced, rapid release of a carbon source in the initial stage of the corncob powder is inhibited, and the inner core is wrapped; the inner shell layer is made of a corn starch / polyvinyl alcohol / corncob powder composite material, the corn starch can supplement a carbon source in time relative to the corncob powder, and the corncob powder can continuously provide the carbon source; chitosan in the core layer can provide a necessary carbon source on one hand, and on the other hand, an adsorption material formed by the chitosan and activated carbon can adsorb impurities in water, so that a flocculation precipitation effect is achieved, and the clarity of water in the later stage of denitrification is guaranteed.

The invention discloses a punch forming device for producing an automobile engine oil pan, and relates to the technical field of punch forming, and the punch forming device comprises a composite mechanism. According to the punch forming device for production of the automobile engine oil pan, through the design of the composite mechanism, materials are placed in the processing mechanism and conveyed to the composite base through the processing mechanism, then a movable cross beam is controlled through a hydraulic column to enable a pressing module to extrude a bearing module, and therefore the punch forming effect is achieved; the effect of manually laying materials is reduced, potential safety hazards of operators are reduced, the operation environment is optimized, after long-time operation of the bearing module, parts can be seriously abraded, and therefore the stamping precision of follow-up materials is affected, the bearing module can be replaced, and in the process that the pressing module extrudes the materials towards the bearing module, the pressing module can be replaced, and the pressing module can be replaced. And the magazine mechanism contracts to store force, so that after stamping is finished, ejection is performed through the magazine mechanism, the effect of preventing material adhesion is achieved, and the subsequent operation efficiency is prevented from being influenced.

The invention relates to a machine leg for a multi-legged robot, belongs to the technical field of mobile carriers, and solves the problems that in the multi-legged robot scheme in the prior art, in order to keep the distance between a trunk and the ground, a motor needs to be powered up for keeping, and limited energy carried by the multi-legged robot is wasted. The multi-legged robot leg comprises a base joint unit, a first leg unit, a second leg unit and a third leg unit, one end of the base joint unit is connected with a trunk of a multi-legged robot, the other end of the base joint unit is connected with the first leg unit, and the two ends of the second leg unit are connected with the first leg unit and the third leg unit respectively. Self-locking can be achieved by changing the first screw and the first gear, when the first motor is not powered on, the first screw can prevent the first gear from rotating, it is ensured that the included angle between the first leg unit and the trunk of the multi-legged robot is not changed, the first motor does not need to be powered on any more, and limited energy carried by the multi-legged robot is saved.

The invention belongs to the technical field of medical instruments, and particularly relates to a dense net support. The dense net support comprises a front fixing section, a blocking section and a rear fixing section, and the blocking section is located between the front fixing section and the rear fixing section. The plugging section is connected with the front fixing section through a front connecting piece, and the plugging section is connected with the rear fixing section through a rear connecting piece; the plugging section is used for plugging an aneurysm position of a blood vessel, the plugging section sequentially comprises an inner layer part, a middle layer part and an outer layer part from inside to outside, the inner layer part adopts an inner layer metal stent, and the outer layer part adopts an outer layer metal stent. The dense net stent can adjust hemodynamics more accurately, and it is ensured that the blood flow of healthy blood vessels is not affected while the aneurysm is closed; the sealing effect of the aneurysm is ensured, and thrombosis is well promoted, so that blocking and healing of the aneurysm are promoted; and the endothelialization process of the stent is facilitated, so that the success rate of fusing the stent into the blood vessel is improved, the effect of completely sealing the aneurysm opening is achieved, and the recurrence risk is reduced.

The invention discloses a clean production process of a blended fertilizer, which comprises the following steps: preparing and selecting raw materials; performing primary granulation on different raw materials to obtain uniform granular raw materials; performing closed ventilation storage on the granular raw materials; proportioning and metering the granular raw materials; mixing and stirring; finally, packaging is carried out, 4-5 mm particles obtained after the raw materials are subjected to extrusion forming through a pair of rollers and subjected to primary granulation are consistent in appearance state, air in the raw materials is removed through extrusion, gaps are compressed, the density and specific gravity of the formed particles tend to be uniform, and the product quality is improved. Blending layering caused by particle size, density difference and different adsorption capacities cannot occur when the raw materials are blended, the blended compound fertilizer meets the international general blending fertilizer proportioning principle, the completely-homogenized blending fertilizer quality requirement can be met, the processing cost is saved, the production efficiency is improved, and the production cost is reduced. And the problem of caking of the raw materials is effectively solved.

The invention provides a cam, a wave generator and a harmonic reducer, the cam comprises a cam body, grooves are formed in the circumferential side face of the cam body, and the grooves are continuously or intermittently distributed in the circumferential direction of the cam body; the length of the cam body in the axial direction is H, the width W of any groove in the axial direction of the cam body meets the condition that W / H is larger than or equal to 0.15 and smaller than or equal to 0.3, and after the cam is matched with the flexible bearing, buffer spaces capable of providing elastic deformation and absorbing vibration are formed in the grooves. According to the harmonic reducer, the cam with the groove and the width meeting the design range is designed and constructed in the peripheral side face, the balance weight of the cam is reduced, the contact area between the cam and the flexible bearing is reduced, in the operation process of the harmonic reducer, a buffer space for providing elastic deformation and absorbing vibration can be formed in the groove with a certain span in the axial direction, and the service life of the harmonic reducer is prolonged. Load distribution of the harmonic reducer in the operation process is more uniform, and high-speed, low-noise and small-vibration operation of the harmonic reducer is facilitated.

The invention provides a transverse excitation film bulk acoustic resonator and a preparation method thereof, and belongs to the technical field of acoustic resonators. The transverse excitation film bulk acoustic resonator comprises a substrate, a piezoelectric layer located on the substrate and an interdigital transducer located on the piezoelectric layer. A cavity is formed between the substrate and the piezoelectric layer; the interdigital transducer comprises an interdigital electrode; the piezoelectric layer is provided with at least one groove or at least one first through hole, and at least one part of the groove or the first through hole is covered by the interdigital electrode; second through holes are formed in the positions, located on the two sides of the interdigital transducer, of the piezoelectric layer in the direction perpendicular to the extending direction of the interdigital electrode and parallel to the piezoelectric layer. And the second through hole is communicated with the cavity. A part of the contact area of the interdigital electrode and the piezoelectric layer is hollowed out, so that the contact area of the interdigital electrode and the piezoelectric layer is reduced, the stray mode is reduced, and the quality factor of the device is increased.

The invention relates to the technical field of plate welding, and discloses a welding clamp for metal plates and a using method thereof.The welding clamp comprises a support, a mounting plate is fixedly connected to the top of the support, two electric telescopic rods are fixedly connected to the inner wall of the mounting plate, and before use, two plates needing to be welded are placed on the tops of balls; power sources of electric telescopic rods at the two ends are switched on, the electric telescopic rods at the two ends drive the corresponding pushing plates and the plates to move towards the center of the mounting plate, first gears rotate in a meshed mode along the outer walls of supporting rods, the first gears drive rolling wheels to rotate clockwise through second gears, and the plates placed at the tops of balls are pushed by the two rolling wheels to move towards the center of the mounting plate; and displacement is generated under supporting of the balls, one end of each plate is forced to be attached to the side face of the pushing plate, the welding faces of the two plates are kept in smooth butt joint under the influence that the appearance of the plates is square, and automatic adjustment of the equipment angle is achieved.

The invention provides a high-density substrate stack packaging structure and a packaging method, and relates to the technical field of semiconductor packaging. The high-density substrate laminated packaging structure comprises a first chip, a conductive wire arc, a first plastic packaging body and a first dielectric layer. The first chip is provided with a first bonding pad. The two ends of the conductive wire arc are connected to the same first bonding pad. The first plastic package body wraps the first chip; and a first wiring layer electrically connected with the conductive wire arc is arranged in the first dielectric layer. The first dielectric layer covers one side, close to the first bonding pad, of the first plastic package body. The surface of the first dielectric layer is provided with first salient points electrically connected with the first wiring layer. And the shearing force borne by the chip in the grinding process can be reduced, and the chip is prevented from being damaged or subfissured.

The invention discloses a photovoltaic energy storage battery device and a photovoltaic energy storage system, and relates to the field of photovoltaic energy storage, the photovoltaic energy storage battery device comprises an energy storage device, the outer side of the energy storage device is provided with an expansion mechanism, the expansion mechanism comprises a main rod, the main rod is provided with an umbrella-shaped assembly, the umbrella-shaped assembly is arranged in an openable manner, and the bottom surface of the umbrella-shaped assembly is provided with a lighting mechanism. The illumination mechanism is used for illuminating the periphery of the main rod and comprises an illumination lamp, the energy storage device comprises a storage battery, the storage battery is fixed in the main rod, and due to the fact that the flexible solar panels are distributed in an umbrella shape, when the driving mechanism drives the lower ring body to move up and down, the illumination lamp can illuminate the periphery of the main rod. The supporting frame is pushed by the supporting rods to be supported at the bottoms of the flexible solar panels in the state of different gradients, the opening degree of the multiple umbrella-shaped flexible solar panels can be changed so as to adapt to sunlight irradiation at different angles, solar energy can be absorbed to the maximum extent, and the multiple supported flexible solar panels can achieve the sunshade effect.

The invention discloses a semi-automatic lining plate butt-welding machine, relates to the technical field of butt-welding machines, and aims to solve the problems that a welding head at a welding position is adhered to a lining plate due to contact between the welding head and the lining plate, and the lining plate is pulled and damaged due to adhesion when the welding head is lifted. According to the semi-automatic lining plate butt-welding machine, a side pressing block is matched with an inner cushion block, a lining plate and a mother plate are pressed tightly before welding, the lining plate and the mother plate are made to be attached tightly, pseudo soldering caused by low attaching degree during welding is avoided, meanwhile, after welding is completed, the lining plate and the mother plate continue to be pressed tightly when a pressure welding head is lifted through deformation compression of an elastic cushion block, and the welding efficiency is improved. The lining plate is prevented from being damaged due to the fact that the lining plate is pulled along with the movement of the welding head when adhesion occurs at the contact position of the welding head and the lining plate.

The real-time blood glucose monitoring device comprises a shell, and the shell is provided with a containing space and a mounting opening communicating the containing space with the outside; the monitoring assembly is arranged in the accommodating space and comprises an electronic unit and a detection unit; the puncture assembly is arranged in the containing space and comprises a puncture part, and the puncture part partially penetrates through the monitoring assembly so that the detection unit can be partially contained in the puncture part; the bottom cover is detachably connected with the shell to seal the mounting opening, the bottom cover is provided with a matching wall which is arranged in the containing space in a protruding and extending mode, the matching wall is provided with a first sealing piece which abuts against the bottom face of the monitoring assembly in a sealing mode to form a sealing cavity, and part of the detection unit and part of the puncturing piece are arranged in the sealing cavity; the area defined by the first sealing piece is smaller than the area of the cross section of the sealing cavity. And the cross section area of the sealing cavity is larger than the area enclosed by the first sealing element, so that the airtightness test is easier to carry out on the basis of ensuring the sealing effect, and the test precision and accuracy are improved.

The zero-coating rice cooking utensil comprises a pot body which is used for making contact with a food material face and made of a stainless steel metal layer, the inner surface of the stainless steel metal layer is provided with micron-sized biting pattern paths, the micron-sized biting pattern paths comprise hydrophobic concave-convex parts which are distributed randomly, and the hydrophobic concave-convex parts are arranged on the inner surface of the stainless steel metal layer. And the roughness of the hydrophobic concave-convex part on the inner side wall of the pot body is smaller than that of the hydrophobic concave-convex part on the inner bottom wall of the pot body. The micron-sized biting patterns are arranged on the inner surface of the stainless steel metal layer, more violent local heat convection can be formed in the early stage of rice cooking, rice grains are stirred better, the rice grains are in a dynamic state and are not prone to adhering to the inner wall, a water and air flowing channel is opened, water can be supported in the later stage of cooking, and the rice cooking effect is improved. Therefore, more moisture can moisten the rice for a longer time, the bonding force between the rice and the pot body is reduced, the probability that the bottom of the pot body is stuck to the pot body is reduced, the rice is more uniform, and the zero-coating non-sticky effect is achieved.

The invention provides a medical community work assisting device which comprises two supports, a water spraying pipe, a water conveying pipe and two spray heads, and a cleaning mechanism used for cleaning the spray heads is arranged on the outer front side of the water spraying pipe. The dredging assembly can linearly reciprocate back and forth through the execution assembly in the cleaning mechanism, the dredging assembly can directly act on the nozzle, blockages are rapidly and thoroughly removed through physical acting force, and automatic cleaning of spray holes of the spray head is achieved; the problem of nozzle blockage caused by disinfection liquid residues or external impurity accumulation is effectively avoided, the continuity and uniformity of spraying disinfection are guaranteed, the dredging effect is further enhanced through the synergistic effect of the optimization assembly, the optimization assembly can drive the dredging rod and the cleaning brush on the surface of the dredging rod to rotate while the dredging rod is used for dredging, and the dredging effect is improved. When the cleaning brush rotates, the contact area between the cleaning brush and the inner wall of the nozzle can be better increased, and tiny parts of the inner wall of the nozzle can be touched.

The invention discloses a wafer drying machine and a wafer support assembly and a lifting mechanism thereof, relates to the field of wafer cleaning equipment, and can solve the problem that a clamped area cannot be effectively cleaned and dried in the cleaning process of a wafer in the prior art. The wafer bracket assembly comprises a wafer bracket which is connected to the inner bottom wall of the drying tank body and is used for bearing a plurality of wafers, and a limiting assembly which is connected to the inner side wall of the drying tank body and is used for cooperating with the wafer bracket to limit the postures of the plurality of wafers; the wafer support comprises a supporting assembly connected to the drying groove body and a plurality of supporting comb plates connected to the supporting assembly, the ends, away from the supporting assembly, of the supporting comb plates are provided with a plurality of supporting grooves in the length direction of the supporting comb plates, and the supporting grooves form two supporting bevel edges used for abutting against the two sides of the wafer respectively so that the supporting bevel edges can make point contact with the wafer. And the plurality of supporting comb plates are connected to the supporting assembly at intervals, so that the plurality of supporting comb plates are supported on the bottom side of the wafer along the arc-shaped extension direction of the edge of the wafer.

The invention provides a deep V-shaped ceramic matrix composite component forming device and method. The forming device comprises a bottom die, an outer die and an inner die. The outer die is connected to the bottom die; the inner mold is connected to the bottom mold, and the bottom mold, the outer mold and the inner mold are encircled to form a cavity for forming the deep V-shaped ceramic matrix composite component; wherein the inner die comprises a V-shaped main body die and a plurality of small-section dies connected to the V-shaped main body die, the plurality of small-section dies are arranged in the narrow opening position and are sequentially connected in the length direction, and the plurality of small-section dies are provided with die drawing angles in the length direction. The deep V-shaped ceramic matrix composite component can be formed and prepared, and demolding is convenient.

The invention discloses a device for polishing weld grooves of aluminum pipelines and containers in a module, which is characterized in that a horizontal clamping station and a vertical clamping station are arranged on a clamping platform, a lower rotating roller group is rotatably mounted on the clamping platform on the horizontal clamping station, a horizontal clamping support frame is fixedly mounted on the clamping platform, and a lower rotating roller group is rotatably mounted on the clamping platform on the vertical clamping station; an upper rotating roller set is installed on the horizontal clamping supporting frame in a lifting mode, and a clamping chuck is rotationally installed on the portion, located on the vertical clamping station, of the clamping platform. A grinding frame is fixedly installed on the grinding platform, a transverse driving sliding seat is installed on the grinding frame, a lifting driving sliding seat is installed on the transverse driving sliding seat in a sliding mode, a longitudinal driving sliding seat is installed on the lifting driving sliding seat in a sliding mode, and a connecting grinding rod is fixedly installed on the longitudinal driving sliding seat. An angle grinder is mounted at the free end of the connecting grinding rod through a sleeving structure; according to the polishing device, the pipeline can be clamped in the horizontal state and the vertical state at the same time, different polishing states are facilitated, meanwhile, the polishing position is adjusted, manual participation is reduced, and safety is improved.

The invention discloses an efficient light capture type new energy photovoltaic regulation and control system applied to the solar photovoltaic field, and the system effectively improves the light capture efficiency through adding a power generation efficiency monitoring module and a meteorological condition monitoring module on the basis of an existing automatic light tracking photovoltaic panel. When the photovoltaic panel is influenced by dust, rain and snow and the light harvesting efficiency is low, the power generation efficiency monitoring module triggers the self-cleaning module to adjust the photovoltaic panel to be in a horizontal state, then the photovoltaic panel rotates, and the dust, rain and snow covering the photovoltaic panel are scraped off by a scraping strip through centrifugal force during rotation, so that the light harvesting efficiency is effectively improved; when the weather condition monitoring module monitors strong wind and hail weather, the self-protection module adjusts the photovoltaic panel to be in a horizontal or vertical state, so that the contact area between the wind and hail and the photovoltaic panel is reduced, damage to the photovoltaic panel is effectively reduced, self-cleaning and self-protection of the photovoltaic panel are achieved, and the service life of the photovoltaic panel is prolonged. Therefore, the light harvesting efficiency and the service life of the photovoltaic panel are effectively improved.

The invention discloses homogeneous stirring equipment for preparing cold water fish feed grease, and relates to the technical field of stirring, and the homogeneous stirring equipment comprises a bin body mechanism. According to the homogenizing and stirring equipment for preparing the cold water fish feed grease, through the design of the bin body mechanism, materials enter from the top of the processing mechanism, circulate and enter the bin body shell, then a motor is started, a central rotating shaft is controlled by the motor to rotate, and the interiors of the materials are rotated by paddle plates, so that the effect of mixing the materials is achieved; through the design of the multiple paddle plates, the stirring range is enlarged, the mixing efficiency is improved, the uniform mixing effect is achieved, the paddle plate grooves are formed, the rotating efficiency is improved through the grooves, the grooves can disturb boundary layers on the surfaces of the paddle plates, resistance is reduced, the flowing efficiency of fluid is improved, and therefore the stirring effect of the paddle plates in the fluid is enhanced; cavitation and cavitation phenomena are reduced, the possibility of generating cavitation and cavitation under high-speed movement is reduced, and the service life of the paddle board is prolonged.

The invention discloses a compressive property detection device of an electronic device circuit board and a use method, relates to the technical field of circuit board testing, and aims to solve the technical problem that the existing circuit board compressive property test device is relatively single in function. According to the circuit board compressive property testing device, the structure of an existing circuit board compressive property testing device is improved, the downward pressing air cylinder is arranged on the testing base frame, the installation pressing plate is arranged at the output end of the downward pressing air cylinder, the mode adjusting mechanism is arranged on the installation pressing plate, and the opposite moving assembly of the mode adjusting mechanism drives the fluctuation adjusting assembly to move; the fluctuation adjusting assembly enables the structure of the rotary pressing assembly to be changed, so that a static pressure test state and a dynamic bump test state can be switched when the pressure test head is in contact with the circuit board to carry out a pressure resistance physical test, and the pressure resistance and the pressure resistance and impact resistance of the circuit board are tested. And a simulation test mode with multiple effects is beneficial to improving the product quality and reliability.

The invention discloses a variable-caliber catheter-sheath integrated thrombus aspiration catheter with an intra-catheter thrombus breaking function, and relates to the technical field of thrombus treatment medical catheters.The catheter-sheath integrated thrombus aspiration catheter comprises a guiding catheter and an aspiration pipe, the aspiration pipe is inserted into the guiding catheter in a sliding mode, and the catheter-sheath integrated thrombus aspiration catheter further comprises a multi-stage adjustment aspiration opening mechanism, a locking mechanism and a thrombus breaking mechanism; and the suction pipe is used for driving the multi-stage adjustment suction port mechanism to retract into the guide pipe or expand outwards from the guide pipe step by step. The multi-stage suction port adjusting mechanism connected with the end part can be driven by the suction pipe to extend out of the guide pipe, and is expanded step by step to reach the caliber with the corresponding size, and the multi-stage suction port adjusting mechanism is composed of the adjusting and scaling assembly, the supporting section metal wire and the covering film, so that a suction port with a larger caliber is conveniently defined; the thrombus can be conveniently and completely sucked and guided into the suction tube, an expander is not needed, operation of a doctor is reduced, and the situation that large thrombus is broken before being sucked into the tube and escapes to a far-end blood vessel to cause blockage can be avoided.

The invention relates to the technical field of mechanical transmission, and provides a connecting rod transmission mechanism and a mirror image engine. The connecting rod transmission mechanism comprises a power sliding block, a power connecting rod and two power pistons, the power connecting rod comprises a connecting rod base body and two linear rod parts, the linear rod parts extend in the first direction, the front end of each linear rod part is connected with one power piston, and the rear end of each linear rod part is fixedly connected with the connecting rod base body; the two linear rod parts are located on the two opposite sides of the connecting rod base body in the first direction, and the power sliding block is installed on the connecting rod base body in a sliding mode in the second direction. The linear rod part does not need to contain a bearing, rotation motion does not exist, the overall cross section is uniform or roughly uniform, standard sinusoidal motion / cosine motion is met, the size reduction design of the linear rod part and the air cylinder is facilitated, the compression ratio in the air cylinder is increased, the combustion efficiency is improved, the overall structure of the engine is more compact, and the needed engine cabin space is reduced. And the power-to-weight ratio and the acceleration performance of the vehicle can be improved.

The invention relates to a semiconductor structure and a manufacturing method thereof. The semiconductor structure comprises a substrate; the memory unit is arranged on the substrate, the memory unit comprises a transistor and a capacitor, the transistor comprises a first source / drain electrode, a grid electrode, a second source / drain electrode and a semiconductor layer surrounding the side wall of the grid electrode, the first source / drain electrode, the second source / drain electrode and the semiconductor layer are sequentially arranged in the first direction, and the first source / drain electrode and the second source / drain electrode are connected with the grid electrode through the semiconductor layer; the capacitor is arranged on one side of the second source / drain electrode and covers part of the side surface of the semiconductor layer; the bit line is arranged on one side of the first source / drain electrode and covers part of the side face of the semiconductor layer, the contact area of the bit line and the semiconductor layer is smaller than the contact area of the capacitor and the semiconductor layer, the contact area of the bit line and the transistor is reduced, and the opposite area of the bit line and the grid electrode of the transistor is reduced; therefore, the parasitic capacitance between the bit line and the grid electrode of the transistor is reduced, and the reading capability of the transistor is improved.

The utility model discloses a rotary valve structure of a dust cup of a dust collector, which comprises an outer dust cup, a plurality of first cavities are arranged in the outer dust cup, a first communication hole is arranged on a partition plate, and the outer dust cup is provided with a first dust discharge port corresponding to a dust discharge channel of a base station of the dust collector; and the inner dust cup is rotationally connected to the partition plate and provided with a second communicating hole and a second dust discharging opening, and a linkage piece corresponding to a rotary guide groove in the dust collector base station is arranged on the outer side of the inner dust cup. The outer dust cup and the inner dust cup form a rotary valve structure, so that when the dust collector host and a base station are assembled in a butt joint manner, the linkage piece is matched with the rotary guide groove to rotate the inner dust cup, each dust collection cavity and a corresponding filtering structure are blocked, and dust is prevented from flowing reversely when garbage in the dust cups is discharged and recycled; and dust, hair and dirt with different particle sizes intercepted by the dust collection cavities are discharged respectively, dirt and garbage blockage in the dust discharge channel is avoided, and therefore it is guaranteed that the dust collector is used neatly, conveniently and efficiently.

According to the plastic-surface waterproof plywood and the production method thereof, the surface hydrophobicity of the plastic-surface waterproof plywood can be effectively improved, fluorine compounds are not used in raw materials, the super-hydrophobicity of the surface of the plastic-surface waterproof plywood can be effectively improved, and harm of the super-hydrophobic surface to human health can be effectively reduced; the preparation method comprises the following steps: carrying out in-situ growth of SiO2 with good internal interfacial force on the surface of Na-montmorillonite by using a sol-gel method to obtain MMT grafted SiO2, and carrying out modification treatment on MMT grafted SiO2 particles by using octadecyl trimethyl ammonium bromide and octadecyl trimethoxy silane to obtain modified MMT grafted SiO2; modified MMT grafted SiO2 is used as a reinforcing phase, polydimethylsiloxane modified epoxy resin is used as a matrix, and the super-hydrophobic coating is prepared. The hydrophobic MMT grafted SiO2 and the nano SiO2 growing on the surface of the Na-montmorillonite in situ form a synergistic effect, so that the hydrophobic performance is improved.

The invention discloses a chip bonding mechanism and bonding equipment, and belongs to the technical field of semiconductors. The chip bonding mechanism is mounted on a space moving unit of the bonding equipment and comprises a mounting bracket, an adapter plate, a bonding head and a posture adjusting module. And the bonding suction nozzle of the bonding head adopts an arc-shaped design, so that the contact area is optimized, and air residue caused by the attachment of the whole plane is avoided. A posture adjusting module and a space XYZ moving unit of the bonding head are matched to adopt six-axis interpolation motion, and it is guaranteed that the posture and path of a bonding suction nozzle can be planned. According to the invention, by using the interpolation motion of the six-axis mechanism and cooperating with the small-area fitting contact of the arc-shaped suction nozzle, the bonding contact point can roll and move outwards along a vortex-shaped track from the center of the chip, and air is effectively extruded, so that a bonding cavity is eliminated. The method is suitable for advanced packaging, and especially suitable for the bonding requirement of mixed bonding and the hole inhibition requirement.

The invention relates to the technical field of solar photovoltaic power generation, and discloses a water surface floating type solar photovoltaic power generation device which comprises a cleaning mechanism, the cleaning mechanism further comprises a floating base, the top of the floating base is fixedly connected with a supporting frame, stormy waves push a floating plate to move up and down, and a hydraulic plate is pushed to move up and down through a hydraulic column and a first connecting rod. A hydraulic plate moves upwards to extrude hydraulic oil at the top of the hydraulic plate, the hydraulic oil enters a telescopic pipe through a hydraulic pipe, so that the telescopic pipe extends out, when the telescopic pipe extends out, a brush moves downwards through a connecting block, when the brush moves downwards, a first gear is meshed with a first rack, the brush continuously rotates to make contact with a photovoltaic panel, and when a floating plate moves up and down, the brush continuously rotates to make contact with the photovoltaic panel; dust and impurities on the surface of the photovoltaic panel are removed, and the situation that the surface of the photovoltaic panel is blocked by the dust and impurities, the contact area with sunlight is reduced, and the power generation efficiency of the photovoltaic panel is reduced is prevented.