58results about How to "Increase contact force" patented technology

The invention discloses a silicon carbon material, a preparation method thereof and a lithium ion battery. The preparation method of the silicon-carbon material comprises the following steps: S1, adding an alkaline reagent into a mixed solution containing a porous carbon-loaded silicon substrate, transition metal salt and a solvent, and drying to obtain a first precursor; s2, performing carbon deposition on the first precursor by adopting a chemical vapor deposition method, performing in-situ growth of a carbon nanotube, and then performing acid pickling and drying to obtain a second precursor; s3, performing silicon deposition on the second precursor by adopting a chemical vapor deposition method, and forming silicon nanoparticles and / or silicon nanowires in the carbon nanotubes in situ to obtain a third precursor; and S4, carrying out carbon coating on the third precursor to obtain the silicon carbon material. The silicon-carbon material is excellent in expansion inhibition performance and compressive strength and has excellent conductivity, and the lithium ion battery containing the silicon-carbon material can give consideration to excellent capacity performance, rate performance and cycle performance.

The invention discloses a sealing surface two-stage adjusting sealing device. The lower support is placed on the upper edge of the circular base, and the lower support and the circular base are connected and fixed through a fastening screw and are sealed through a sealing ring. The upper portion of the lower support and the top cover are fixed through fastening screws, and the lower support and the top cover are sealed through a sealing ring. A lower sealing gasket and an upper sealing gasket are fixed to the surfaces of the inner sides of the lower support and the top cover, and the lower support and the sealing gaskets are provided with evenly-distributed groove sliding grooves. A split type large sealing ring support is placed above the lower sealing gasket, protruding sliding rails are evenly distributed on the outer side of the split type large sealing ring support, and the sliding rails correspond to the grooves. The upper portion of the split type large sealing ring support and the split type large sealing ring upper cover are positioned through a positioning pin (the support corresponds to the upper cover in a one-to-one mode). And the upper cover and the top cover of the split type large sealing ring are sealed through an upper sealing gasket. The sealing effect is guaranteed, frictional wear can be reduced, and the service life is prolonged.

The invention discloses a quick closing operation mechanism of a circuit breaker, which comprises a shell, a handle, a static contact supporting piece, a moving contact supporting piece, a linkage piece and a tripping mechanism, and is characterized in that the handle and the moving contact supporting piece are rotationally arranged in the shell, a contact torsion spring is arranged between the shell and the moving contact supporting piece, the moving contact supporting piece is provided with a long circular hole, and the linkage piece is arranged in the long circular hole; a pin shaft is arranged in the shell and penetrates through the oblong hole, and the moving contact supporting piece rotates relative to the pin shaft; an installation area is arranged in the shell, the energy storage limiting piece slides and is limited in the installation area, the handle is provided with a moving area, the moving contact supporting piece is provided with an abutting portion, and the energy storage limiting piece is provided with a moving portion limited in the moving area and a matching portion. And in the last section of closing action, energy storage is realized based on the energy storage limiting piece, oxide between the moving contact and the static contact can be quickly broken down, and the overall closing effect is improved.

The utility model discloses a via hole connector, which is used for installing a cable on electrical equipment, and comprises a rear cover sleeved on the cable; the connecting part is arranged on the cable in a sleeving manner and comprises an inner connecting body and an outer connecting body arranged on the inner connecting body in a sleeving manner, the outer connecting body comprises a first ring body, a second ring body and a third ring body which are coaxially arranged, a plurality of open grooves are formed in the first ring body, folded edges are arranged in the open grooves, the folded edges are arranged in an inclined manner, and the first ring body and the second ring body are coaxially arranged. A plurality of open holes are formed in the second ring body, a plurality of openings are formed in the third ring body, and the second ring body is gradually shrunk from the first ring body to one side of the second ring body; and the sealing ring is arranged between the rear cover and the connecting ring and is sleeved on the cable. According to the utility model, the light-weight design is adopted, the cost and the weight can be reduced, the cable can be prevented from falling off when being inserted, and the connection stability is ensured.

The invention relates to a push-in protective grounding plate for an insert, which comprises a plane part extending perpendicular to the insertion direction of the insert and a two-piece holding part formed on the plane part, wherein the two-piece holding portion is configured for holding the spring and the protective conductor and includes a first holding portion and a second holding portion. The invention also relates to a protective grounding assembly comprising the push-in protective grounding plate and an insert comprising the protective grounding assembly. Therefore, simple, rapid, reliable and shock-proof connection of the protective conductor is realized, the protective grounding plate is suitable for installation of a hard conductor and a soft conductor, and the protective grounding plate is simple in structure and easy to manufacture.

The utility model discloses a polishing device for an electric vehicle instrument panel, and relates to the technical field of polishing devices, the polishing device comprises a workbench and a polishing machine body, a rectangular plate is slidably arranged on the workbench, a connecting shaft and a micro motor arranged at the bottom of the connecting shaft are rotatably arranged on the rectangular plate, and a mounting plate is fixedly connected to the top of the connecting shaft; a lower pressing plate is arranged above the mounting plate, an L-shaped frame is arranged at the rear end of the top surface of the rectangular plate, a circular hole is formed in the L-shaped frame, a threaded sleeve is fixedly connected to the top of the circular hole, a lead screw is in threaded connection with the interior of the threaded sleeve, a handle is arranged at the top of the lead screw, and an upper pressing plate is rotationally arranged at the bottom of the lead screw; through cooperative use of the micro motor, the electric vehicle instrument panel can be conveniently rotated, so that the electric vehicle instrument panel can be conveniently and comprehensively ground, and the grinding efficiency of the electric vehicle instrument panel is improved; and through the use of the telescopic piece, the height of the lower pressing plate is conveniently adjusted, so that the height of the electric vehicle instrument panel is conveniently adjusted, and the working efficiency of grinding the electric vehicle instrument panel is further improved.

The utility model relates to a photovoltaic panel quick positioning fixture in the field of mounting fixtures, which comprises a mounting positioning fixture body clamped on a mounting base surface corrugated strip, the lower end of the mounting positioning fixture body is fixedly connected with an inverted V-shaped clamping block, and the left end and the right end of the inverted V-shaped clamping block are symmetrically in threaded connection with threaded nails. The threaded nails extend into the mounting base surface corrugated strips, waterproof cushion layers are arranged between the threaded nails and the inverted-V-shaped clamping blocks, the front sides and the rear sides of the left ends and the right ends of the inverted-V-shaped clamping blocks are fixedly connected with side edge clamping vertical pieces, and self-sliding outer protection plates are connected between the two corresponding side edge clamping vertical pieces in a sliding mode. According to the scheme, after the threaded nail is installed, the self-sliding outer protection plate slides downwards, the position of the threaded nail is shielded, the phenomenon that water leaks at the position of the waterproof cushion layer due to direct sunlight and water vapor infiltration is avoided, and the safety of the photovoltaic panel body in the installation and use process is guaranteed.

The utility model discloses an earth excavation foundation pit protection device capable of being positioned and supported, and relates to the technical field of foundation pit protection devices, the earth excavation foundation pit protection device comprises a protection plate, fixed ground inserts, insertion blocks and splicing blocks, the fixed ground inserts are welded on the two sides of the bottom end of the protection plate, the two insertion blocks are fixed on one side of the protection plate, and the splicing blocks are fixed on the other side of the protection plate. And two splicing blocks are fixed on the other side of the protection plate. The adjusting rod is screwed to drive the moving plate to move horizontally, on one hand, the adjusting rod can extend out of the protection plate conveniently, so that the adjusting rod can be inserted into soil around a foundation pit to increase the contact force between the protection plate and the foundation pit, and on the other hand, the moving rod descends under the action of the push block and the sliding block, so that the foundation pit is protected. And thus, the descending block pushes the moving block to do horizontal movement, then the fixing rod can stretch out of the interior of the fixing ground insert conveniently, the soil grabbing capacity of the fixing ground insert is improved, and then the stability of the protection plate during use is improved.

The present invention provides an optical image stabilization device and an electronic device that use a mobile image sensor chip for motion compensation, wherein the optical image stabilization device that use a mobile image sensor chip for motion compensation includes: an image sensor chip, a carrier, a contact component, a lower substrate, and a shape memory alloy drive component; wherein the image sensor chip is fixedly arranged on the carrier and electrically connected, and the carrier contacts the lower substrate through the contact component to be electrically connected to an external circuit; the image sensor chip moves in the X and Y directions and rotates in the plane under the drive of the shape memory alloy drive component to perform motion compensation. In the present invention, an image sensor chip is used for motion compensation, and the image sensor chip is electrically connected to the external circuit through the contact component, and the structure and process are simple, which improves the product yield, reduces the manufacturing cost, improves the reliability, and improves the image quality.

This invention relates to the field of agricultural machinery technology and discloses a mechanism for adjusting the speed of a star wheel. The mechanism includes a steel frame with star wheel shafts evenly distributed from bottom to top. Star wheel bodies are evenly fitted onto the star wheel shafts along their axial direction. Sprockets and chains are provided between adjacent star wheel shafts. A hydraulic motor is mounted on the outside of the steel frame. The mechanism also includes a centrifugal wheel, with its main body fixed to one end of the star wheel shaft. A radial groove is formed on the centrifugal wheel, and a centrifugal counterweight and a cam are connected within the groove via a first serpentine spring. The main body is connected to one end of the star wheel shaft via a bearing, and a first torsion spring is provided between its outer wall and the star wheel shaft. A connecting arm is provided between the cam and the centrifugal counterweight. The mechanism utilizes a hydraulic motor to independently drive the star wheel, achieving stepless speed regulation. Through the triple synergistic effect of centrifugal force adaptive clamping force adjustment, automatic jamming clearance, and eccentric linkage vibration unblocking, it effectively prevents the star wheel body from jamming and corn kernel damage, resulting in a high peeling rate, low kernel loss rate, and stable operation.

The breathing machine comprises a main machine and a humidifying tank, the main machine is provided with an inserting base, the humidifying tank is provided with an inserting section, the inserting section can be in inserting fit with the inserting base in the first direction and can be separated from the inserting base in the second direction opposite to the first direction, and the inserting section is provided with an air outlet adapter pipe; the bayonet socket is provided with a receding groove extending in the first direction, so that when the humidifying tank is matched with the main machine in an inserted mode, the air outlet adapter pipe can enter the receding groove in the first direction. In the process of assembling and disassembling the humidifying tank, the protruding air outlet adapter tube does not need to be disassembled, and the humidifying tank inserted with the air outlet adapter tube can be integrally inserted into the bayonet socket, so that the assembling and disassembling steps of the humidifying tank are simplified, and the disassembling step of the air outlet adapter tube in the process of assembling and disassembling the humidifying tank is omitted. In addition, the risk that internal water leaks from the air outlet due to shaking of the humidifying tank is avoided, the cleaning burden of a user is reduced, and the use experience is improved.

The present application relates to the technical field of wind power slip rings, and discloses a high-stability wind turbine slip ring device, which is used to solve the problem of aggravated wear or unstable connection caused by unstable direct pressure between the carbon brush and the conductive ring. The pressure control device automatically adjusts the extrusion force of the support spring and the carbon brush. When the carbon brush contacts the conductive ring, the extrusion force between the carbon brush and the conductive ring is always maintained within a fixed range, thereby avoiding the phenomenon of excessive wear of the carbon brush or unstable connection caused by fluctuations in the extrusion force between the carbon brush and the conductive ring; the wear degree of the carbon brush is judged by the position of the movement of the pressure control device. After the carbon brush is worn for a certain amount, the limit block of the pressure control device pushes the scraping device, so that the scraping plate of the scraping device scrapes the residual carbon powder on the conductive ring, to prevent excessive carbon powder from remaining on the conductive ring and affecting the contact between the carbon brush and the conductive ring.

The utility model discloses an automatic bulb feeding clamping jaw mechanism which comprises a fixed plate, a rotary support, a lifting plate, a rotating arm and clamping assemblies, the rotary support is arranged between the lifting plate and the rotating arm, the clamping assemblies are arranged on the two sides of the lower surface of the rotating arm respectively, and each clamping assembly comprises a hinge joint, a movable plate, a clamping arm and a driving air cylinder. The number of the clamping arms is two, the clamping arms are rotationally connected with the rotating arms respectively, one end of the movable plate is hinged to the clamping arms, the other end of the movable plate is hinged to the hinge joint, the telescopic end of the driving air cylinder is fixedly connected with the hinge joint, a lifting air cylinder is arranged in the center of the fixed plate, and the telescopic end of the lifting air cylinder penetrates to the position below the fixed plate to be fixedly connected with the lifting plate. A second guide column is arranged between the fixing plate and the lifting plate. The mechanism is simple in design, the working efficiency is improved through circulating switching of the two stations, meanwhile, the mechanism can ascend and descend automatically, the needed driving force is small, resources are saved, and the overall cost of equipment is reduced.

The utility model provides an electric connector, which comprises an insulating base, a moving terminal and a static terminal, the moving terminal and the static terminal are fixedly held on the insulating base, the moving terminal is provided with a first fixedly holding part fixedly held on the insulating base and an elastic contact arm formed by extending from one end of the first fixedly holding part; the elastic contact arm comprises a connecting part, an abutting part formed by extending from the connecting part and a contact part which extends from the abutting part and abuts against the static terminal, the insulating base is provided with a bottom surface which is spaced from the abutting part in the vertical direction so that the abutting part can abut against the bottom surface when the abutting part deforms downwards, and the insulating base further comprises a boss which is formed by protruding upwards corresponding to the connecting part; and the boss is provided with a supporting surface for supporting the connecting part and an arc surface transited from the supporting surface to the bottom surface. The boss of the electric connector enables stress not to be excessively concentrated when the elastic contact arm is pressed downwards, so that the service life of the movable terminal is prolonged, and the contact force of the movable terminal and the static terminal in a normal state is improved.

The utility model discloses a special bush dismounting tool for a point switch, which comprises a bolt and a nut which can be matched with each other, and a top sleeve and an auxiliary sleeve are sequentially sleeved on a screw rod between the bolt and the nut; during use, the screw penetrates into the indication rod bushing, the indication rod is arranged between the top sleeve and the auxiliary sleeve, the bolt is rotated to be matched with the nut, and the bushing is ejected out of the indication rod by utilizing the acting force and the counter-acting force between the top sleeve and the auxiliary sleeve to finish dismounting, or the screw penetrates into the connection iron bushing, and the connection iron is arranged between the top sleeve and the nut to finish dismounting. The bolt is rotated to be matched with the nut, the bushing is ejected out of the connecting iron through acting force and counter-acting force between the ejection sleeve and the nut, dismounting is completed, then the screw penetrates into the inner wall of the joint of the indication rod or the connecting iron, and dismounting is completed by rotating the bolt to be matched with the nut. The bushing is jacked into the indication rod or the connecting iron by using the acting force and the counter-acting force between the jacking sleeve and the nut, so that the installation is completed; the service life of parts is prolonged, the working efficiency is improved, and the maintenance cost is reduced.

The utility model relates to the technical field of surveying poles, and discloses a wind-disturbance-resistant engineering surveying pole fixing device which comprises a pole body, a base and a fixing assembly, assembling cylinders are distributed on the periphery of the base, conical heads are arranged at the bottoms of the cylinders and can be conveniently inserted into soil, and cones, assembling rollers and reset springs are arranged in the cylinders. The elliptical seat sleeves the surface of the assembly roller and can extrude the cone to extend out of the communicating window to be inserted into soil during rotation, so that multiple supporting points are formed; and the reset spring can reset the cone during disassembly. During installation, the assembling cylinder is connected with the base through external threads, after the assembling cylinder is inserted into soil, the connecting base is rotated through a right-angle wrench to drive the assembling roller, and the oval base extrudes the cone to extend out for fixing; and the wrench is reversely rotated to withdraw the cone during disassembly, and operation is convenient. The device is in multi-point contact with soil through the cone, the contact area and the vertical contact force are increased, the device can be stably fixed without deep insertion in soft geology, and the wind resistance is remarkably improved.

The invention provides an intelligent inspection device for a booster station, and relates to the field of booster station inspection, the intelligent inspection device for the booster station comprises a track and a vehicle body, an automatic disassembly and assembly type advancing assembly is mounted above the vehicle body, a telescopic assembly is mounted in the vehicle body, a plurality of crawling wheels are mounted at the bottom of the telescopic assembly, and the telescopic assembly is used for increasing the height of the vehicle body. The two clamping assemblies are respectively mounted on two corresponding side surfaces of the vehicle body. According to the intelligent inspection device for the booster station, the automatic disassembly and assembly type advancing assembly is arranged, so that the intelligent inspection device can adapt to outdoor wind-blown sand and freezing rain environments, the cost is further reduced due to the arrangement of a single rail, booster stations with different layouts can be customized conveniently, multiple devices can be taken care of through one-time inspection, and inspection personnel do not need to be matched with walking inspection; by arranging the automatic disassembly and assembly type advancing assembly, the clamping assembly and the telescopic assembly, an inspector does not need to work outdoors in a severe environment.

The application discloses a pipeline inner circumference cleaning robot, and cleaning device comprises front end cleaning device and upper cleaning device, the front end cleaning device comprises front shovel, left shovel and right shovel, the front shovel is connected at the front end of the robot frame body and is pushed to walk and moves up and down, the left shovel and the right shovel surround the center point fixed on the front shovel, and are symmetrically distributed, and are simultaneously rotated and unfolded along the circular guide rail on the front shovel; the upper cleaning device comprises lifting platform, upper shovel and rotating mechanism, the lifting platform is connected above the robot frame body, the lower end of the upper shovel is provided with angle adjusting device, and the rotating point of the guide rail is arranged at the outer edge of the bottom, the upper shovel is installed on the lifting platform through the rotating mechanism, and the lifting platform, the rotating mechanism and the angle adjusting device are cooperated to make the upper shovel reach the required height and angle; the front end cleaning device and the upper cleaning device are adjusted to the appropriate positions according to the actual conditions.

The utility model provides a human body detection device, which comprises a detection main body and a mounting part, and the mounting part is connected to the detection main body. Wherein the mounting part comprises a first side wall, an abutting structure and at least two elastic arms, and the abutting structure protrudes out of the first side wall; the elastic arm extends out based on the first side wall, and the elastic arm is configured to be an elastic sheet. The human body detection device provided by the utility model is simple and convenient in installation process and is safer.

The utility model discloses a POS machine base connecting device capable of adjusting adsorption force and POS equipment, and the scheme is skillfully characterized in that a first part and a second part are arranged on a POS machine and a POS machine base, and the contact acting force of the POS machine base on the POS machine is improved by utilizing the characteristic that the first part and the second part have magnetic attraction acting force, so that when the POS machine is arranged in an accommodating part of the POS machine base, the contact acting force of the POS machine base on the POS machine is not influenced by the magnetic attraction acting force of the first part and the second part. The first component and the second component can relatively generate auxiliary acting force to improve the placement stability of the POS machine, the moving mechanism arranged in the base of the POS machine is connected with the second component, the position of the second component is switched through the moving mechanism, and the first component and the second component are in a first state and a second state which are opposite or staggered. Therefore, the contact acting force between the POS machine and the POS machine base is convenient to adjust, the POS machine can be flexibly taken and fixed conveniently, and the scene of free taking use and the scene of fixed use can be considered.

The invention discloses slurry dipping equipment for coating the exterior of a wax piece with slurry, and relates to the field of wax piece slurry coating, the slurry dipping equipment comprises a base, the top of the base is fixedly connected with a rotating disc, the top of the rotating disc is fixedly connected with an equipment main box, and the top of the equipment main box is fixedly connected with a driving device; a hydraulic press is fixedly connected to the outer surface of the driving device, a positioning unit is arranged at the output end of the hydraulic press, a placing unit is fixedly connected to the bottom of the positioning unit, slurry needs to be poured into the slurry barrel unit, a wax piece is preliminarily fixed in the placing unit, and then the driving device enables the hydraulic press to start to work; and the positioning unit can control the placing unit to enter the slurry in the containing barrel and drive the whole placing unit to rotate, so that the slurry wrapping effect is improved.

The utility model relates to the technical field of hearing aids, and discloses a glasses type bone conduction hearing aid with a clamping function. The glasses type bone conduction hearing aid with the clamping function comprises a glasses main body, a bone conduction hearing aid and a fastener, the bone conduction hearing aid is arranged on the glasses main body, two bone conduction vibrators of the bone conduction hearing aid are respectively arranged on glasses legs of the glasses main body, and the fastener is connected to the glasses legs of the glasses main body through fixing through holes. According to the glasses type bone conduction hearing aid with the clamping function, when the glasses main body is worn, the bone conduction vibrators are attached to skull skin above auricles of a wearer, and the fastener surrounds the rear part of the head of the wearer to tighten the two glasses legs of the glasses main body, so that the contact force between the bone conduction vibrators and the skin is increased; therefore, the bone conduction vibrator is tightly attached to the skin, the capability of coupling a sound signal to auditory nerves is enhanced, the interface sound propagation loss is reduced, and the hearing aid effect of the hearing aid is improved.

The utility model relates to the technical field of logistics transportation, and discloses a double-sided logistics tray structure which comprises a panel and supporting blocks. The reinforcing structure comprises a rib plate, overturning bodies, clamping protruding blocks and clamping grooves, the multiple clamping grooves are formed in the bottom of each panel, the multiple overturning bodies are rotationally connected to the top face and the bottom face of the rib plate, each overturning body is fixedly provided with one clamping protruding block, and the supporting effect between the two panels is improved through the rib plate and the overturning bodies; the strength and the bearing capacity of the whole tray structure are improved, each rib plate is designed to be detachable, even if the panels and the rib plates are damaged due to the fact that local stress of the panels is too large, the single panels and the single rib plates can be replaced, modular assembly is achieved, the later maintenance cost is further reduced, and waste is reduced; the strength and the stability of the whole tray structure are guaranteed, the connection of the rib plates and the panels can be completed by rotating the overturning body in a mode of extruding the two panels, the installation is simple and convenient, and the efficiency is high.

The application discloses a multi-angle welding device for steel plate processing, and relates to the field of metal welding equipment. The outer side of a bearing welding base body is provided with a hydraulic driving part, the output end of the hydraulic driving part is connected with a bearing butt joint assembly, and the upper end of the bearing butt joint assembly is used for placing a steel plate workpiece to be welded. The multi-angle welding device for steel plate processing is independently and synchronously driven to rotate the steel plate placed by the bearing butt joint assembly around the same rotary axis. When the hydraulic driving part pushes the corresponding steel plate upward to make the steel plate angularly move, the rotation angle of the steel plate and the stroke of the driving rod are in linear relationship. An operator can quickly calculate the extension amount of the driving rod according to the required included angle, and the repeated trial is not needed. The symmetrical adjustment mode makes the angle adjustment of the two steel plates not interfere with each other, and the adjustment process is stable and continuous. The adjustment can be realized in the range of 0-180 degrees, and the stable angular welding stability of the two groups of steel plates in angular contact can be ensured.

The invention discloses a robot grinding and polishing constant force control method and system based on neural network force compensation. The method comprises the following steps: constructing a neural network prediction model with a fault tolerance mechanism, and establishing mapping between a robot end pose and a gravity interference force; performing grouping compensation on the predicted gravity interference component through a weight grouping collaborative scaling principle, and extracting a net grinding and polishing contact force signal; rolling optimization is carried out based on the model prediction controller, and an optimal tail end pose adjustment instruction is solved; performing on-line fine adjustment on prediction model parameters by using a neural network prediction deviation; an intelligent compensation signal is generated in combination with a fuzzy logic compensator, and feedforward superposition and feedback adjustment are achieved; and finally, generating an auxiliary pose adjustment instruction through a self-adaptive impedance control model, and fusing the auxiliary pose adjustment instruction with the optimal instruction to form a final control instruction. According to the method, the influence of gravity interference, model uncertainty and environment change is effectively overcome, and high-precision and high-robustness constant-force grinding and polishing control is realized.

The application discloses a conformal bidirectional strain sensor and conductive circuit on a curved structure and an integrated manufacturing method thereof, which comprises a transfer medium layer adhered to a surface to be measured, a strain sensing grid with multi-walled carbon nanotubes adhered to the upper surface of the transfer medium layer, and a conductive circuit with a microstructure array of micro-pillar hole structures arranged in the transfer medium layer; the strain sensing grid is provided with fine and dense cracks to sense strain, and the conductive circuit is covered with a packaging layer material; in the preparation, a template is prepared and surface hydrophilic and hydrophobic treatment is performed first, then strain sensing functional ink filling is performed, then the strain sensing grid is pre-stretched to generate micro-cracks, then multi-conductive functional material composite filling is performed in the conductive circuit area, then in-situ transfer printing of the sensing and conductive integrated structure is performed, and finally the packaging layer is covered; the application realizes high-precision sensing measurement and effective transmission of electrical information; the processing of the strain sensing area and the conductive circuit area is simple, and high-efficiency and low-cost manufacturing is realized.

The utility model relates to the field of foundation pit protection devices, and discloses an earth excavation foundation pit protection device which comprises a bearing plate, a supporting barrel is fixed to the top face of the bearing plate, two limiting holes are formed in the outer wall of the supporting barrel, an air cylinder is fixed to the inner wall of the supporting barrel, and the bottom end of the air cylinder is fixed to the top face of the bearing plate. Two connecting blocks are fixed to one end of a telescopic rod of the air cylinder, the connecting blocks and the limiting holes are arranged in a sliding mode, a sliding frame is arranged on the outer wall of the supporting cylinder in a sliding mode, the connecting blocks are fixed to the inner wall of the sliding frame, and first movable hinges are fixed to the left side and the right side of the sliding frame correspondingly. According to the device, the sliding frame and the telescopic column can be driven by the air cylinder to move up and down, so that a worker can adjust the distance between the two barrier plates according to the width of a foundation pit, the barrier plates can stably support and protect the foundation pit, and the phenomenon that the barrier plates fall off due to uneven stress is prevented.

The utility model discloses a speed regulation device with a damping structure, and relates to the technical field of electric tools. According to the technical key points, the device comprises a speed regulation switch, a speed regulation knob is arranged on the upper side of the speed regulation switch, a speed regulation platform is arranged on one side of the speed regulation switch, a through hole is formed in the speed regulation platform, a knob damping structure is inserted in the through hole, the knob damping structure comprises a spring seat and a compression spring, and a steel ball is arranged on the side, close to the speed regulation platform, of the compression spring; the steel ball is arranged on the compression spring and in the through hole, the highest point of the steel ball is higher than the upper edge of the through hole, a plurality of circular grooves are formed in the lower side of the speed regulating knob, and the steel ball can be clamped in the circular grooves. The utility model has the advantages that: through the arrangement of the speed regulation damping structure, when the speed regulation knob rotates, the firmness of clamping is ensured through the clamping matching of the circular groove and the steel ball; meanwhile, compared with the damping characteristic of a rubber ring, abrasion is reduced, and the phenomenon of gear sliding or gear retreating is reduced.

The present invention provides a method for processing a textured stainless steel strip, comprising: using a 0.8-1.3 mm cold-rolled stainless steel strip to perform multiple rough rolling to obtain a rough-rolled strip, at least one of the multiple rough rolling passes uses a first texture roller; cleaning the rough-rolled strip and then annealing it at high temperature; performing multiple finish rolling on the rough-rolled strip after high temperature annealing to obtain a finished strip, at least the first and last two passes of the multiple finish rolling use a second texture roller; cleaning the finished strip and then bright annealing it; drawing and straightening the finished strip after bright annealing to obtain a finished strip, the inlet and outlet of the drawing and straightening use a third texture roller; wherein the first texture roller, the second texture roller and the third texture roller are all obtained by surface texturing the roller to be processed by a roller surface texturing device. The method for processing a textured stainless steel strip provided by the present invention can improve the uniformity of texturing treatment and the scratch problem of stainless steel strip.

The invention relates to the technical field of casting, discloses a sliding block demolding mechanism of a casting mold, and aims to solve the problem that the molding quality of the mold and the normal operation of the demolding mechanism are influenced by a pouring material. Through the arrangement of a second telescopic rod, a sliding block main body and a pressing plate, after the female die drives the formed die to turn over by a half cycle, the second telescopic rod drives the sliding block main body and the pressing plate to extend into an inner cavity of the die, then the pressing plate moves and applies external supporting force to the inner wall of the die, and then the second telescopic rod drives the sliding block main body and the pressing plate to move downwards and reset; by means of the external supporting force, the die is driven by the pressing plate to move downwards synchronously, due to the fact that the pressing plate and the female die in the device are arranged in a separated mode, pouring materials cannot affect the pressing plate in the casting process, and then the forming quality of the die and normal operation of a die stripping mechanism are not affected.