190results about How to "Avoid uneven force" patented technology

The invention discloses an automatic single-yarn strength tester and a test method, and relates to the technical field of textile detection equipment, the automatic single-yarn strength tester comprises a single-yarn strength tester used for testing breaking strength, breaking elongation and breaking strength indexes of a single yarn and fiber pure spinning or blended yarn; and the translation mechanism is used for translating a plurality of distributed yarns and carrying out continuous high-efficiency test operation. According to the automatic single-yarn strength tester, a connecting piece is pulled through a tension spring, then a fastening piece and a limiting block are driven to conduct limiting installation on a limiting groove in a rubber pad, the rubber pad can be rapidly replaced after being abraded, the yarn clamping stability is ensured, and the testing accuracy is ensured; the good friction force of the clamping face can be recovered by replacing the rubber pad, it is ensured that the single yarn is tightly fixed in the clamping mechanism, the single yarn cannot move due to unstable clamping in the tensile test process, it is ensured that the test can be conducted smoothly, and the result is accurate.

The invention discloses a mass concrete composite anti-crack structure and a crack control construction method based on the mass concrete composite anti-crack structure. The composite anti-crack structure comprises a core common concrete layer, an outer side anti-crack concrete layer, a reinforcing mesh arranged between the core common concrete layer and the outer side anti-crack concrete layer, and a top anti-crack concrete layer. The method comprises the steps that firstly, the thickness of side face anti-crack concrete and the thickness of top face anti-crack concrete needing to be poured are calculated according to cracking risk assessment, the side face anti-crack concrete is poured firstly, then core common concrete is poured, and it is ensured that the pouring height of the side face concrete is always 20-30 cm higher than the core common concrete; and then the top surface is completely constructed by adopting anti-crack concrete. The reinforcing mesh subjected to special treatment is adopted, so that the overall stress of the composite structure is uniform, the overall anti-cracking performance and durability of the composite structure are improved through the outer side anti-cracking concrete, the construction technology is simple, meanwhile, a large amount of construction cost and operation and maintenance cost can be saved, and the composite structure is suitable for application and popularization.

The invention relates to the technical field of copper rod machining, in particular to a copper rod straightening device and a working method.The copper rod straightening device comprises a first fixing plate, a second fixing plate, a third fixing plate, a first straightening assembly, a second straightening assembly and an adjusting assembly which are sequentially arranged in the copper rod conveying direction, and each straightening assembly comprises a moving plate, a sliding rail, a support and a round roller; the support is connected with the fixing base through the connecting rod, the bottom of the fixing base is connected with the sliding block, the round rollers are distributed in the circumferential direction of the copper rod, all-directional supporting and straightening force applying are conducted on the copper rod, the uniformity of straightening force is guaranteed, the adjusting assembly synchronously drives the movable plate to move through positive and negative threads of the adjusting rod, the fixing base is driven to be adjusted along the sliding rail, and the round rollers synchronously get close to or get away from the copper rod. Synchronous movement of the movable plate is achieved through the positive and negative threads of the adjusting rod, the multiple fixing bases are driven to move synchronously along the sliding rails, the multiple round rollers are controlled to be close to or away from each other synchronously, linkage adjustment and uniform stress of the multiple round rollers in all directions are achieved, and the straightness and straightening efficiency of the copper rod are improved.

The utility model provides a main plunger sealing device of a solid pump, which is arranged between a plunger guide cylinder and a main plunger of the solid pump, is positioned at the front end of the plunger guide cylinder, and comprises an annular mounting seat, an annular scraper, a check ring, a combined seal, a copper sleeve and a gland which are sequentially arranged, a flange protruding inwards is arranged at the front end of the annular mounting seat; the gland is connected with the rear end of the annular mounting base, and the annular scraper, the check ring, the combined seal and the copper sleeve are fixed and pressed between the flange and the gland; the annular scraper is formed by splicing at least three arc-shaped sub-scrapers, and gaps are formed among the sub-scrapers; blades are arranged on the inner sides of the sub-scrapers, and grooves are formed in the outer sides of the sub-scrapers in the circumferential An annular elastic piece is integrally arranged in a groove of the annular scraper in a sleeved mode, so that the sub-scraper is shrunk inwards and pressed to the outer surface of the main plunger. The main plunger sealing device is good in sealing performance and not prone to material leakage; the scraper is more strongly attached to the outer surface of the main plunger, so that materials adhered to the outer surface of the main plunger can be better scraped; and the sealing device is not easy to corrode after long-term use.

The invention relates to the technical field of bridge tilting prevention, in particular to a highway municipal bridge single beam frame tilting prevention reinforcing device which comprises a plurality of reinforcing inclined struts fixedly connected to the inner side of a single beam frame reinforcing base, and two bearing pressure early warning seats fixedly mounted on the inner side of the single beam frame reinforcing base. The upper ends of the two bearing pressure early warning seats are both fixedly connected with a protection ring sleeve, and a main supporting anti-inclination assembly is arranged at the upper ends of the two bearing pressure early warning seats in a penetrating mode, so that when the anti-inclination reinforcing device is arranged on the highway municipal bridge single beam frame, the stress direction can be adjusted in time in the anti-inclination process of the bridge single beam, and the anti-inclination effect of the bridge single beam is improved. The stress uniformity of the device is guaranteed, the stability after the single beam is erected is improved, the device is prevented from being damaged due to stress on one side, in the using process, the overall stress buffering effect can be improved, the device is prevented from inclining after buffering, the overall using effect of the anti-inclination reinforcing device for the highway municipal bridge single beam frame is improved, and the service life of the anti-inclination reinforcing device is prolonged.

The utility model discloses a self-stress compensation type ultra-long concrete anti-crack supporting device, and belongs to the technical field of supporting devices, the self-stress compensation type ultra-long concrete anti-crack supporting device comprises a bottom plate, and an H-shaped steel frame is arranged above the bottom plate; the fixing cylinders and the telescopic rods are arranged to form the telescopic supporting legs, the two telescopic supporting legs form a main body supporting system, the main body supporting system is matched with the rigid supporting characteristic of the H-shaped steel frame to effectively disperse the load during concrete pouring, the supporting mechanisms are arranged, and therefore the telescopic rods can synchronously support the two sides of the H-shaped steel frame, and the concrete pouring efficiency is improved. The two telescopic rods are fixedly connected together through the cross beam to form a whole, so that the hydraulic jacking mechanism drives the cross beam to achieve height adjustment of the main body supporting system, accurate control is achieved, stress uniformity is guaranteed, and the stability of the supporting system is improved. And the situation that self-stress distribution in the structure is changed due to uneven stress before the concrete structure is not completely hardened is avoided, the construction quality is ensured, and cracks are prevented.

The invention discloses a detachable lower supporting type I-steel cantilever scaffold device, and belongs to the technical field of cantilever scaffolds. According to the detachable lower supporting type I-steel cantilever scaffold device, a hydraulic driving assembly is connected with a first clamping plate, so that the first clamping plate moves and can drive a sealing plug to move through the hydraulic driving assembly, the sealing plug can hydraulically drive a piston rod and a two-way rack rod to move, the two-way rack rod is in transmission with a gear, and the gear gives rotating force to a screw rod; the screw can control the locking block to apply clamping force to the I-shaped steel, so that the problem of slippage can be effectively prevented, the construction safety can be effectively improved by adopting an automatic locking mode, meanwhile, if slippage continues, the driving rod can independently drive the contact block to move at the moment to enable the contact block to touch and press the switch, and therefore the purpose of alarming can be achieved through the alarm. In this way, on-site constructors can be warned at the first time, the constructors can conveniently and rapidly evacuate from dangerous areas, and therefore the safety risk can be greatly reduced.

The utility model discloses an offshore platform pile foundation static load test counter-force device which comprises a main beam, an auxiliary beam, a fixing frame, a first jack, a second jack, a displacement sensor, a pressure sensor and a control unit. The auxiliary beams comprise the first auxiliary beam and the second auxiliary beam. The top of the main beam is fixedly connected with the center of the bottom of the first auxiliary beam and the center of the bottom of the second auxiliary beam. The first jack is arranged in the vertical direction and fixed to the top of the main pile, and the output end of the first jack makes contact with the center of the bottom of the main beam. The two sets of second jacks are arranged in the horizontal direction and fixed to the bottoms of the two ends of the main beam correspondingly, and the output ends of the two sets of second jacks make contact with the outer sides of the first auxiliary pile and the second auxiliary pile correspondingly. The displacement sensors are arranged on the main pile and the auxiliary pile correspondingly, and the pressure sensors are arranged at the output ends of the first jack and the second jack correspondingly. The counter-force device disclosed by the utility model can be used for carrying out horizontal static thrust and vertical compression resistance static load tests on an offshore pile foundation platform, and is low in cost and simple and convenient to operate.

The invention relates to the technical field of grinding wheel grinding devices, in particular to a grinding wheel grinding tool and a grinding method. Comprising a base, a transmission mechanism, a first polishing block and a second polishing block. The first grinding block and the second grinding block are arranged on the base in a sliding mode and are oppositely arranged so that the gap between the first grinding block and the second grinding block can be adjusted. The transmission mechanism is in transmission connection with the first grinding block and the second grinding block so that the transmission mechanism can drive the first grinding block and the second grinding block to move relatively. When the grinding wheel polishing tool is used, the edge of a grinding wheel is moved to the position between the first polishing block and the second polishing block, so that the grinding wheel is polished to the preset thickness. In the polishing process, due to the fact that the two sides of the grinding wheel are polished at the same time, the two sides of the grinding wheel are both subjected to thrust perpendicular to the radius direction, and the two forces are opposite. Therefore, the two opposite pushing forces offset each other, and the grinding wheel is prevented from being broken due to the fact that the grinding wheel is subjected to single-side pushing force. And therefore, the grinding wheel can be ground to be thinner.

The invention relates to the technical field of auxiliary replacement of double suspension insulator strings, and provides an auxiliary replacement device and method for double suspension insulator strings, which simplify the auxiliary replacement process of the double suspension insulator strings. According to the device, the horizontal state of the two connecting plates can be kept during replacement operation, and stable supporting of the two connecting plates is achieved through the structural design that a bearing plate and a positioning pin are introduced into the device; pulling force is applied through the hoist, and the pulling force borne by the two insulators is transferred to the hoist; and the hoist is positioned on the central line, so that the problem of non-uniform stress caused by a load-carrying phenomenon is avoided, and the situation that a cross arm hanging point bolt with an unfastened end cannot be smoothly disassembled due to the fact that the two connecting plates tilt up, so that an insulator chain with an unfastened end is unbalanced in stress and an insulator chain on the other side inclines downwards due to the influence of gravity is avoided.

The invention discloses a full-automatic PTEE film stretching and sintering machine and a stretching and sintering method, and relates to the technical field of PTEE film stretching and sintering machines, the full-automatic PTEE film stretching and sintering machine comprises a sintering and heating bin, conveying pieces, a film to be stretched, a first assembly, a second assembly and a third assembly, the conveying pieces are symmetrically arranged in an inner cavity of the sintering and heating bin, and the film to be stretched is located in the middle of the conveying pieces; the first assembly and the second assembly are located on the same vertical plane, and through the design of the stabilizing pipe and the pushing piece, solution conveying work can be completed when the first assembly and the second assembly work; the problem that whether the conveying device and the stretching device are not flush or not and consequently the thin film is stressed unevenly can be ingeniously monitored indirectly through movement of the push piece in the stabilizing pipe; the design of one group of parts with multiple functions obviously reduces the complex maintenance work and cost caused by the increase of the parts; the overall operation efficiency of the equipment is improved, and the production continuity is guaranteed.

The invention belongs to the technical field of bridge steel shell hoisting construction, and particularly relates to a fine adjustment device suitable for stability of a gravity center changing curve type steel shell, the fine adjustment device comprises a steel shell, mounting angle blocks are symmetrically arranged on the side face of the upper end of the steel shell, and an adjusting mechanism is arranged at the upper end of each mounting angle block. According to the fine adjustment device, a flexible adjustment structure composed of the magnetorheological elastomer and the electromagnetic coil is arranged, and a steel cable traction adjustment mechanism driven by the hydraulic motor is combined, so that bidirectional precise regulation and control over the stability of the steel shell are achieved, and the shear modulus of the magnetorheological elastomer can be linearly regulated and controlled through the current of the electromagnetic coil; the stress change caused by gravity center shift can be quickly responded, and the dynamic unbalance force can be counteracted in real time.

This utility model discloses a fracture-resistant bolt connection pair structure for long-span steel bridges, including a bolt body, an anti-loosening nut assembly, an anti-corrosion washer assembly, a first steel bridge connection plate, and a second steel bridge connection plate. This utility model relates to the field of steel bridge connection structure technology. This fracture-resistant bolt connection pair structure for long-span steel bridges forms a dual stress dispersion structure through a tapered connector between the bolt head and the bolt segment, and four U-shaped stress relief grooves on the bolt segment. This significantly reduces the stress concentration coefficient at the bolt connection, preventing fatigue crack initiation under long-term alternating loads. Simultaneously, the main nut and auxiliary nut, in conjunction with an annular boss, compress the nitrile rubber elastic bushing, continuously compensating for preload attenuation caused by vibration, achieving a preload retention rate of over 90%. This solves the problem of uneven bolt stress caused by loosening of traditional nuts. It ensures the fracture-resistant performance of the bolt connection pair from both "fatigue resistance" and "loosening prevention" dimensions, meeting the core stress requirements of long-span steel bridges.

The utility model relates to the technical field of grinding machine discharging, in particular to a grinding machine discharging reversing mechanism which comprises a discharging table and a conveying table, a first driving shaft and a first driven shaft are rotationally connected into the discharging table, and a first conveying belt is arranged on the surface of the first driving shaft and the surface of the first driven shaft in a sleeved mode. A first motor is fixedly installed on the side face of the discharging table, the output end of the first motor is fixedly connected with a first driving shaft, and a second driving shaft and a second driven shaft are rotationally connected into the conveying table. According to the conveying device, when a workpiece is conveyed to the conveying table from the discharging table through the sliding way, the baffles on the two sides of the sliding way can prevent the workpiece from falling off from the sliding way, when the workpiece moves on the conveying table, the workpiece is guided through the first connecting plate and the second connecting plate, contact impact can be buffered through the pressing block of the first connecting plate and the spring, and damage is reduced. The rollers of the second connecting plate improve the sliding performance of the workpieces, accumulation is avoided, and the conveying efficiency is improved.

The invention provides a double-layer jacquard fabric interlayer weaving process and a double-vision artistic effect realization method, and the method comprises the following steps: providing warp yarns, weft yarns and interlayer connecting yarns which are adaptive to double-layer jacquard, and the breaking strength of the interlayer connecting yarns is not less than 3.2 cN / dtex; the method comprises the following steps: importing surface layer jacquard pattern data and inner layer jacquard pattern data into a pattern weaving CAD system, presetting a yarn interweaving threshold value and pattern edge transition parameters of an interlayer connection area, generating a collaborative weaving data table of surface and inner layer jacquard and interlayer connection, marking corresponding interweaving areas of surface layer patterns and inner layer patterns, and carrying out collaborative weaving; the collaborative weaving data table comprises intervention opportunities and interweaving frequency parameters of connecting yarns in each region; according to the invention, by switching the connecting structure in different periods, adapting to the characteristics of the jacquard area and combining the parameters of the connecting yarn and the limitation of the interweaving depth, the complete concealment of the connecting points, the accurate alignment of mirror image jacquard of the surface and inner layers, the control of the dislocation amount within 0.15 mm and the complete and non-split double-visual effect are realized, and the visual requirements of high-end fabrics are met.

The invention provides an edge cutting device for a plastic bucket, and relates to the field of plastic bucket machining. The bottom plate structure is positioned and spliced below the supporting assembly, a circular groove is formed in the bottom plate structure, a supporting piece of a circular ring structure is positioned and embedded into the bottom plate structure through the circular groove and a connecting plate, and a base plate made of a flexible rubber material is bonded to the top end of the supporting piece. The cutting head part penetrates through the flash and then is inserted into the base plate, the plastic barrel makes slight contact with the base plate and does not make stress contact with the base plate, during rotary edge cutting, the cutting head part drives the base plate and the supporting part to rotate together, the bottom of the supporting part and the top end of the rotary head smoothly rotate, and during edge cutting, the cutting head part can be protected; according to the edge cutting device for the plastic barrel, the cutting head part cannot be abraded, the service life is prolonged, and the problems that in the edge cutting process of a common edge cutting device for the plastic barrel, a cutter is prone to making contact with a base plate, the cutter is abraded, and the service life is affected are solved.

The present application discloses a sock pickup device for hosiery machine with axial pushing and radial stretching, which comprises pickup needles for picking up sock loops in cooperation with knitting needles of the hosiery machine; the pickup needles are arranged in a ring shape in the needle slots of the needle disc to form a pickup needle ring; the pickup needle ring is subjected to an inclined first driving force in the axial direction through the bearing surface of the pickup needles, and the pickup needles of the pickup needle ring are driven to move along the needle slots from the needle disc axis to away from the needle disc axis; the pickup needle ring is subjected to a second driving force in the radial direction, and the second driving force drives the pickup needles of the pickup needle ring to move along the needle slots from away from the needle disc axis to close to the needle disc axis; and the first driving force is generated by the pressing ring. The present application drives the pickup needles with bearing surfaces to move radially by the inclined first driving force generated by the pressing ring, and realizes the radial reciprocating movement of the pickup needle ring in cooperation with the second driving force, so that all the pickup needles of the pickup needle ring are subjected to synchronous force to avoid pickup missing.

This invention provides a satellite lifting auxiliary mechanism and method, relating to the field of satellite ground assembly technology. The invention includes an inclined support assembly and a ring support assembly. First, the satellite is placed within the ring space of a ring-shaped component. Then, the lower end of the inclined support rod is connected to the lifting point at the bottom of the satellite, and the upper end of the inclined support rod is connected to the ring component, forming a radial support structure. This support structure is connected to external lifting equipment via lifting lugs, allowing for stable lifting of the satellite. The evenly distributed circumferentially arranged inclined support rods and lifting lugs ensure balanced force on the satellite during lifting, solving the problem that conventional lifting methods cannot be used at the lower lifting point of the satellite. This invention features a simple and stable structure, adaptable to various satellite configurations. Simultaneously, the evenly distributed circumferential support structure ensures a stable lifting process, avoids uneven force distribution on the satellite, and allows for reuse, improving ground assembly efficiency.

The application discloses a modular cable hanging device and a use method, and belongs to the technical field of mine machinery. The device comprises a hanging mechanism, two supporting mechanisms are arranged on the hanging mechanism, the hanging mechanism comprises three hangers, a falling-prevention assembly is arranged above the hangers, and a cleaning assembly and a driving assembly are arranged in the falling-prevention assembly. The driving assembly can change the cable hanging position through forward rotation or reverse rotation, so that the fatigue damage of the cable caused by repeated bending during movement is avoided, the risk of cable breakage is effectively reduced, the service life of the cable is prolonged, and the cleaning assembly can reciprocally rotate in cooperation with the arc-shaped inclined strips during the switching of the clamping position, so that the dust on the surface of the cable can be quickly cleaned. In addition, the cleaning assembly can clean the surface of the cable in a large range as the clamping position of the cable is switched to different lengths, and the running safety and maintenance convenience of the cable are improved.

The utility model relates to parking shed support structure technical field discloses a kind of angle-adjustable parking shed support beam fixing frame, including shed roof, support, angle adjusting and locking assembly.Support assembly contains support frame and symmetrically arranged fixed column, fixed column opens multiple sets of positioning hole and is hinged with support frame;Angle adjusting assembly has recess, support diagonal, sliding sleeve and connecting rod, and two groups of sliding sleeves are connected by connecting rod;Locking assembly includes positioning rod, pull button and return spring, and positioning rod penetrates sliding sleeve and fixed column positioning hole.The fixing frame is slid along the fixed column by sliding sleeve, drives support diagonal to adjust the inclination angle of support frame, adapts different sunshine and functional requirement;Positioning rod cooperates with return spring to lock angle quickly, connecting rod ensures synchronous adjustment on both sides, and gives consideration to adjustment flexibility and support stability, adapts various parking shed use scene.

The utility model relates to the field of batteries, and provides a battery cell test fixture, which comprises a first pressing assembly, a second pressing assembly, a driving assembly and a temperature detection device, wherein the first pressing assembly and the second pressing assembly are oppositely arranged and are arranged on the two sides of a to-be-detected battery cell respectively, the driving assembly is used for driving the first pressing assembly and the second pressing assembly to be close to each other, and at least one of the first pressing assembly and the second pressing assembly is provided with a mounting hole for mounting a temperature detection device. The temperature detection device is arranged in the mounting hole but not between the first pressing assembly or the second pressing assembly and the battery cell, so that the problem that the battery cell is stressed unevenly due to the fact that the temperature detection device is flatly laid on the surface of the battery cell is solved, namely, the temperature detection device does not influence the contact area between the first pressing assembly or the second pressing assembly and the battery cell; the surface stress of the battery cell is uniform, so that the actual stress condition can be accurately simulated, and the test accuracy is improved.

The utility model discloses an iron core and transformer with cushion block structure are provided, and the iron core with cushion block structure comprises core body, coil and cushion block subassembly, and the coil is positioned by the step cushion block of end abutment, and the first step portion and the second sleeve joint portion of beam body are installed in the clamping. The transformer, including shell, lid and the iron core with cushion block structure of winding, the iron core with cushion block structure is set up in the shell, and the shell is sealed with the lid, and the input terminal and the output terminal are arranged on the lid, and the input terminal and the output terminal are connected with the iron core with cushion block structure respectively. The utility model discloses an effect that the coil installation fixed effect is good, and the sliding displacement is not easy.

The utility model belongs to graphite tool fixture technical field especially is a graphite tool fixture, including base, the upper surface fixed connection of base has workstation, the both sides of workstation are all set up with the sliding slot, the upper surface middle part fixed connection of base has fixed base, the upper surface both sides of fixed base are all fixed connection with slide rail, both sides of two slide rails are all slidingly connected with the sliding block, the upper surface fixed connection of two groups of sliding blocks has the connecting plate, one side of two connecting plates is all fixed connection with the fixed frame. The utility model discloses through drive electric telescopic link drive fixed plate sliding, make it pull the connecting plate and make the sliding block slide on the slide rail, and two connecting plates cooperate with the meshing mode of bilateral rack one and central fixed gear, can drive two connecting plates to move inwards simultaneously, realize the symmetrical clamping to work piece, avoid the stress uneven problem that partial clamping brings, improve the positioning accuracy, improve the clamping stability in the processing process.

This utility model discloses a hydraulic gate opener cylinder with an anti-bending structure, comprising: a cylinder body, the upper side of which is tightly fitted with an end cap, and the end cap and the cylinder body are connected by fastening screws arranged in an array; further comprising: an anti-bending mechanism for increasing rigidity is provided inside the cylinder body, and reinforcing ribs are provided on the outer side of the cylinder body, arranged in an array; a rigid support mechanism for connection is provided on the outer side of the cylinder body, and an annular sleeve is provided on the outer side of the cylinder body. In this hydraulic gate opener cylinder with an anti-bending structure, the piston rod is slidably connected to the cylinder body through a bushing, forming a rigid support point to distribute lateral loads and achieve an anti-bending effect. The hollow rod is slidably connected to the connecting rod, thereby limiting further radial displacement of the piston rod and avoiding uneven force due to excessive clearance, thus improving the overall anti-bending capacity of the cylinder.

This invention discloses a plastic box turning device for an assembly line, comprising a belt conveyor line, a base at the bottom of the belt conveyor line, side plates on the top of both sides of the base, and a lifting seat on the side of the side plates that are far apart from each other. The assembly line plastic box turning device also includes a clamping assembly positioned above the belt conveyor line. This invention relates to the field of plastic box production equipment technology. Through the cooperation of the belt conveyor line, base, side plates, lifting seat, clamping assembly, spacing adjustment assembly, and guide limiting assembly, plastic boxes conveyed to a designated position are fixed by clamping. Driven by a servo motor, the clamped plastic boxes are turned 180 degrees, realizing automated turning of plastic boxes and meeting the turning and conveying needs of plastic boxes of different specifications. This ensures the smooth conveying of the turned plastic boxes to subsequent processes, improving overall production efficiency and product qualification rate.

The utility model belongs to the technical field of gauze production, and particularly relates to gauze production flattening and shaping equipment which comprises a machine body, a water storage tank is arranged at the top end of the machine body, the output end of the water storage tank is connected with a connecting plate, first sliding blocks are welded to the two sides of the connecting plate, and limiting plates are arranged outside the first sliding blocks. One side of the limiting plate is welded to the inner wall of the machine body, and a pressing plate is welded to the bottom end of the connecting plate; through the design that the sliding flattening structure is arranged at the top end of the equipment and the fixing wheels are additionally arranged on the two sides of the structure, before the gauze is flattened and shaped, the fixing wheels extend and fix the gauze, so that wrinkles on the surface of the gauze are flattened, and the problem that the surface of the gauze is wrinkled during flattening and shaping operation is avoided; and the attaching structure is additionally arranged at the bottom end of the storage table of the equipment, the gauze is more attached to the pressing plate by clicking the driving structure to swing, and the problem that the periphery of the gauze is stressed unevenly when the gauze of different sizes is flattened and shaped is solved.

This utility model relates to the field of power supply device technology and discloses a power cord anti-pull fixing device, including a cable and a rectangular cover. The cable passes through a circular hole. A limiting component is provided inside the rectangular cover cavity, including a first clamping unit and a second clamping unit. A fixing unit is provided between the first clamping unit and the rectangular cover cavity. A compression unit is provided between the second clamping unit and the rectangular cover cavity. By setting up components such as an arc segment, a first hanging plate, a second hanging plate, a tension spring, a second crossbar, a slide, a guide rod, and a compression spring, the arc segment deformation provides initial buffering, the tension spring stretches to generate a reverse elastic force to disperse the pulling force, and the second crossbar slides along the slide to compress the compression spring to form secondary buffering. The guide rod ensures stable movement direction and avoids deviation from the force. The double elastic buffering structure significantly improves the anti-pull protection effect of the cable and effectively reduces the risk of the cable being pulled apart.

The utility model discloses a device capable of fixing a die for vibration, which comprises a fixing mechanism and a vibration table, the fixing mechanism is a steel bar, the fixing mechanism and a vibration table top are fixed by welding, and die fixing devices which are uniformly distributed away from a vibration center are additionally arranged on the vibration table. The trouble that an experimenter manually fixes a mold for vibration can be reduced, accidental errors of an experiment are reduced, and the problem that vibration is not uniform when concrete pouring vibrates can be effectively solved.

This utility model relates to the field of rooftop tents, and in particular to a soft-top quick-opening rooftop tent, comprising a first base plate and a second base plate and a connecting frame rotatably connected. A first tent fabric is provided on the first base plate, the second base plate, and the connecting frame. The first tent fabric includes a front cover portion. A support frame is provided on the first base plate. The support frame includes an extension rod, a top support rod, a first rotating rod, a second rotating rod, and a linear drive device. One end of the extension rod is rotatably connected to the first base plate, and the other end of the extension rod is rotatably connected to the top support rod. The first rotating rod is rotatably connected to the extension rod, and the second rotating rod is rotatably connected to the top support rod. The first rotating rod and the second rotating rod are rotatably connected to each other. One end of the linear drive device is rotatably connected to the extension rod, and the other end of the linear drive device is rotatably connected to the second rotating rod. The rotation centers of the extension rod and the top support rod are biased towards the side closer to the rotation centers of the first rotating rod and the second rotating rod. This utility model solves the problem of cumbersome operation of rooftop tents.

The application relates to the auxiliary technology field of asphalt sample production and discloses a demolding machine, which comprises a material ejection mechanism for ejecting samples to separate the samples from molds; the material ejection mechanism comprises a fixed part, a driving part and a material ejection part, the fixed end of the driving part is connected with the fixed part, and the driving end of the driving part is connected with the material ejection part; the driving part comprises a plurality of first air cylinders and a plurality of second air cylinders, the plurality of first air cylinders are arranged in a ring array, the plurality of second air cylinders are arranged in a ring array, and the second air cylinders are arranged between the central axis of the fixed part and the first air cylinders; the material ejection part comprises a first material ejection block and a second material ejection block, the first material ejection block is arranged around the edge of the second material ejection block, the first material ejection block is drivingly connected with the first air cylinders, and the second material ejection block is drivingly connected with the second air cylinders. The application realizes stable demolding of samples with different sizes through the switchable double-cylinder driving structure, effectively solves the problem of uneven stress, and significantly improves the finished product rate and production efficiency.