362results about How to "Guaranteed normal rotation" patented technology

The utility model discloses a power cable installation traction device, which belongs to the technical field of cable traction and comprises a box body, a lantern ring is fixedly arranged on one side surface of the box body, an inner cavity of the lantern ring is hollowed-out, a circular groove is formed in the inner cavity of the lantern ring, a limiting plate is fixedly arranged on the inner wall of one side of the circular groove, and an adaptive disc is arranged in the inner cavity of the lantern ring in a sliding manner. An inner cavity of the disc is hollowed out, teeth are installed on the peripheral side of the disc, a sliding groove matched with the limiting plate is formed in one side face of the disc, a brush used for cleaning the surface of the power cable is installed in the inner cavity of the disc, and a driving motor is fixedly installed on the inner wall of one side of the box body. An output shaft of the driving motor penetrates through the box body and is fixedly connected with a gear meshed with the teeth, and the two side faces of the box body are each provided with a through hole for a common power cable to penetrate through. According to the power cable installation traction device, the problem that dust and stone particles adhered to the peripheral side of a power cable slip is solved, and the laying efficiency of the power cable is improved.

The invention provides a cylindrical hydrodynamic ventilation structure special for a cooling tower fan, and belongs to the technical field of cooling ventilation. Comprising a tower body, a water basin is installed at the bottom of the tower body, a water inlet pipe is installed at one end of the water basin, a water return pipe is installed at the top of the water inlet pipe, a water pump is arranged at one end of the water inlet pipe, and a water outlet pipe is installed at one end of the water basin. By arranging the worm gear speed increasing assembly and the power driving assembly, kinetic energy of water flow is converted into mechanical energy through circulation of water power, the cooling process is accelerated, complex parts such as a motor and a transmission device in a traditional cooling tower are reduced, the manufacturing cost is reduced, maintenance points and the fault rate are reduced, and the service life of the cooling tower is prolonged. The reliability and stability of the system are improved, the rotation angle adjustment of the fan blades is increased, the air volume is increased, evaporation and heat dissipation of water are accelerated, energy consumption is reduced, the flexibility of the system is enhanced, and the ventilation structure can adapt to different working environments and cooling requirements.

The utility model relates to the technical field of screening devices, in particular to a coal mine screening device with a grading screening function, which comprises a mounting rack, a fixed frame is mounted on the inner side of the mounting rack, and the fixed frame is arranged on the inner side of the mounting rack; when coal is screened, a motor is started, under the action of a cam, the coal on the top of the upper fixing plate and the gravity of the coal, the two fixing plates are made to vibrate in a reciprocating mode, a first through hole and a second through hole are made to vibrate up and down in a reciprocating mode to screen the coal, and in the up-and-down reciprocating movement process of the first through hole and the second through hole, the coal screening efficiency is improved. By arranging the cleaning mechanism, the inner wall of the first through hole can be cleaned through a first cleaning ring, and the inner wall of the second through hole can be cleaned through a second cleaning ring, so that part of substances adhering to the inner walls of the first through hole and the second through hole can be scraped; and the risk that materials adhere to the inner walls of the first through holes and the inner walls of the second through holes to cause blockage is avoided, and therefore the coal screening effect is guaranteed.

The utility model provides a solar panel assembly, and relates to the technical field of solar panels. The first end of the support is rotationally connected with the battery panel, and the second end of the support can move relative to the battery panel so as to be close to or away from the battery panel; one end of the elastic piece is connected to the battery panel, and the other end of the elastic piece is connected with the second end of the bracket; wherein under the condition that the bracket and the battery panel reach a preset angle, the elastic piece is in a stretching state. By arranging the elastic piece, stepless adjustment of the support and the cell panel can be achieved at the preset angle, that is, the angle of the cell panel can be adjusted at will within the preset angle, and a gear does not need to be arranged in the rotating structure to fix the cell panel. In addition, the elastic piece does not need to be provided with a gear, so that a user can conveniently unfold and fold the solar panel assembly, and the difficulty of unfolding and folding is reduced.

The invention relates to the technical field of waste gas treatment, in particular to a multi-effect purification device for industrial waste gas. The technical problems that an existing waste gas purification device cannot conduct targeted separation and purification on waste gas according to the content of impurities in the waste gas, the waste gas is not in sufficient contact with sprayed treatment liquid when passing through a rotational flow tower, the waste gas treatment effect is poor, meanwhile, sticky impurities in the waste gas are continuously accumulated between blades in the middle of a rotational flow plate, and the waste gas is wasted are solved. While the waste gas treatment effect is continuously reduced, the device is inconvenient to clean subsequently. According to the technical scheme, the industrial waste gas multi-effect purification device comprises a rotational flow tower, a rotational flow tank and the like; and a rotational flow tank is arranged on the rotational flow tower. According to the waste gas treatment device, the middle parts of the plurality of rotational flow plates are driven to lift through the fixer, and a gap between two adjacent rotational flow plates is adjusted, so that the passing amount of waste gas between the two adjacent rotational flow plates is controlled, and the waste gas treatment effect is enhanced.

The invention belongs to the technical field of heat treatment, and particularly relates to an alloy steel heat treatment device which comprises a heat treatment furnace, a fixing frame is fixedly connected to the lower end of the heat treatment furnace, a conveying chain plate is installed in an inner cavity of the heat treatment furnace, first supporting frames are installed at the two ends of the conveying chain plate, and two T-shaped clamping blocks are symmetrically and fixedly connected to the outer portion of the conveying chain plate. Every two T-shaped clamping blocks form one set, multiple sets of T-shaped clamping blocks are arranged outside the conveying chain plate, discharging bracket assemblies are connected to the outer portions of the T-shaped clamping blocks in a clamped mode, each discharging bracket assembly comprises a U-shaped clamping sleeve connected to the outer portion of the corresponding T-shaped clamping block in a clamped mode, a supporting plate is fixedly connected to the upper end of each U-shaped clamping sleeve, and a containing groove is formed in the upper end face of each supporting plate. An inner cavity of the placing groove is used for placing an alloy nut and is rotationally connected with a transmission shaft; the problem that due to the fact that the supporting plate is inserted into the sleeve, when the driving wheel rubs against the conveying belt support, the supporting plate is stressed to move upwards, and the driving wheel is difficult to rub against the conveying belt support and rotates stably is solved.

The invention relates to the technical field of water-stable layer maintenance for road construction, and discloses a water-stable layer maintenance device and method for municipal road construction, a smoothing assembly is arranged below a fixing frame, and the smoothing assembly is used for smoothing a water-stable layer covering film; the discharging assembly is arranged at the rear end of the inner side of the fixing frame and used for pressing a film covering the water stabilizing layer. The pressing roller rolls on the ground, the film roll is pressed by the pressing roller to be laid on a water stabilizing layer of a road, meanwhile, the protrusions on the disc make contact with the ground, it can be guaranteed that the pressing roller rotates on the road surface, and the pause condition is prevented; a fixing shaft on a pressing roller drives a first bevel gear to rotate, the first bevel gear drives a second bevel gear to rotate, and the second bevel gear drives a stirring roller to rotate through a connecting shaft, so that loose soil is stirred downwards, the loose soil is evenly pressed above a film through a material guide hopper, and the two sides of the film are pressed; and meanwhile, the position of the film blown by wind deviates conveniently.

The invention discloses an end execution joint of a heavy-load mechanical arm for Tokamak device maintenance, which comprises a first shell, a second shell, a driving mechanism and a detection mechanism, a mounting cavity is formed in the first shell, the driving mechanism comprises a driving assembly and a rotating part, the driving assembly is arranged in the mounting cavity, and the rotating part is arranged in the mounting cavity. The driving end of the driving assembly is connected with the first end of the rotating part, the second end of the rotating part is connected with the second shell, and the driving assembly is configured to drive the rotating part to rotate by a preset angle so as to drive the second shell to rotate; the detection mechanism is configured to detect the rotating angle of the rotating part and control the driving assembly to work or stop according to the detection result. According to the heavy-load mechanical arm for tokamak device maintenance, the tail end execution joint is designed in a modularized mode, the tail end execution joint is simple in structure, the occupied space of the joint is reduced, and the interior of the tokamak device can be conveniently maintained.

The invention discloses intelligent cooling protection equipment for a new energy battery and a use method thereof, and relates to the technical field of new energy batteries, the intelligent cooling protection equipment comprises a protection box body, the top surface of the protection box body is fixedly connected with a box cover shell through bolts, and the left side and the right side of the inner wall of the box cover shell are each provided with a cooling opening; a fixed pressing shell is fixedly connected to the center of the bottom face of the box cover shell, and intelligent temperature control switches are arranged on the left side and the right side of the bottom face of the box cover shell correspondingly. According to the device, intelligent cooling is carried out in time aiming at high temperature in the battery using process, the problem of energy waste of a new energy battery or short circuit of a battery connecting line is avoided, the device has a fixed battery loosening alarm function, surface damage of the battery caused by loosening in the battery using process is avoided, and the service life of the battery is prolonged. The device can solve the problem of danger of spontaneous combustion and explosion of the damaged battery, the use safety of the battery is ensured, the stability of the whole device in the use process can be ensured, and the problem of shaking of the device in the use process is avoided.

The utility model discloses a clamp for metal processing, which relates to the technical field of clamps and comprises a clamp seat, the top end of the clamp seat is connected with a support plate, a threaded groove is arranged in the support plate, a screw is inserted in the threaded groove, the end of the screw is connected with a movable clamping plate through a bearing, circular rings are distributed on two sides of the support plate, and the circular rings are connected with the movable clamping plate through a bearing. And brushes are connected to the inner sides of the circular rings. Through the arrangement of the circular ring and the brush, in the using process, through the mutual cooperation of the circular ring and the brush, chippings on the outer surface of the screw rod can be cleaned, so that the chippings are prevented from entering the threaded groove in the supporting plate, and therefore normal rotation of the screw rod in the threaded groove can be effectively guaranteed; and in the using process, through mutual cooperation of an inserting rod and a fixing strip, a worker can conveniently take down and replace all sets of brushes reaching the service life, so that the cleaning effect on the screw rod is guaranteed.

The present invention belongs to the technical field of pipeline processing, and discloses a chamfering and beveling machine for welding welds of thick-walled pipelines, including a supporting mechanism, an installation mechanism, a control mechanism, a beveling mechanism and a fixing mechanism. In the present invention, after the thick pipeline is fixed on the support plate of the sliding frame, the fixing mechanism in a folded state is extended into the interior of the thick pipeline, and then the liquid pump is turned on to inject hydraulic oil into the multi-stage cylinder and the telescopic rod. After that, the thick pipeline is fixed relative to the installation mechanism with the cooperation of the support block and the telescopic rod, so as to prevent the thick pipeline from shaking when the beveling cutter cuts the thick pipeline, resulting in poor bevel shape. At the same time, after the support frame completes the support of the thick pipeline from the inside, the axis of the middle ring automatically coincides with the axis of the thick pipeline, so as to ensure that the moving seat rotates around the axis of the thick pipeline, thereby ensuring the forming effect of the bevel and preventing the bevel from being offset, resulting in the inability to weld.

The utility model discloses an energy-saving ventilation device for a building, and relates to the technical field of air duct systems. The energy-saving ventilation device for the building comprises an exhaust pipe, the rear end of the exhaust pipe is fixedly connected with an air inlet pipe, the interior of the exhaust pipe is slidably connected with a filter screen, and the interior of the exhaust pipe is fixedly connected with a second fixing plate; a cleaning assembly is arranged in the exhaust pipe and comprises a rotating shaft, the rotating shaft is rotationally connected to the interior of the second fixing plate, and the end, away from the second fixing plate, of the rotating shaft is fixedly connected with a cleaning plate; the end, close to the filter screen, of the cleaning plate is fixedly connected with cleaning brush bristles, and the cleaning brush bristles make contact with the filter screen. Compared with an existing ventilation device, the filter screen is cleaned through the cleaning brush bristles, dust and sundries on the filter screen can be removed, and the situation that the follow-up ventilation effect is affected by too many impurities attached to the filter screen is prevented; meanwhile, the use efficiency of the air interchanger is improved, and the service life of the air interchanger is prolonged.

The utility model relates to the technical field of conveying equipment, in particular to a rotating wheel capable of preventing foreign matter jamming, which comprises a conveying belt, a plurality of second pin rollers, a plurality of first pin rollers and a plurality of second pin rollers. The anti-jamming assembly is arranged in the second roller body, the anti-jamming assembly is used for preventing foreign matter from hindering rotation of the second roller body, the anti-jamming assembly comprises a fixed mandrel movably arranged in the second roller body, and the fixed mandrel is movably arranged in the middle of the conveying belt; and the surface of the fixed mandrel is rotationally connected with a first roller body. When the second roller body rotates on the surface of the first roller body, the grooves and the flanges are arranged, so that installation gaps between the second roller body and the rotating grooves are reduced due to the flanges, the number of wound cords is reduced, the cords are prevented from entering the space between the second roller body and the first roller body, and the service life of the cords is prolonged. Normal rotation of the second roller body is guaranteed as much as possible, and reliability of conveying and sorting is guaranteed.

The application relates to cervix uteri detection equipment, and discloses a cervix uteri sampling swab, which comprises a brush head, a sight glass and a brush head sleeve, the brush head is placed in the brush head sleeve, a sight glass sleeve is arranged on the outer side of the outer wall of the brush head sleeve, and the sight glass sleeve is used for arranging the sight glass. The brush head and the sight glass are arranged in the different hollow structures respectively, the sight glass is fixed to the periphery of the sleeve opening, the observation angle is larger and clearer, and the situation that the brush shields the sight line can be avoided; and the diameter of the sleeve can be reduced.

The utility model discloses an efficient irrigation spray gun capable of spraying evenly, the spray gun is provided with two steering wheels, each steering wheel comprises a circular wheel body, a blade fixedly arranged on one side of the wheel body and a hub vertically and fixedly arranged in the center of the wheel body, and the hubs of the two steering wheels are coaxial and fixedly connected with each other. The number of steering water spraying pipes of the spray gun is two, the two water spraying pipes are both connected with an upper base of the spray gun, water outlets of the two steering water spraying pipes face the corresponding steering wheels respectively, and hubs of the two steering wheels are both fixedly connected with a worm of a driving device on the spray gun. According to the utility model, the impact force of water flow is increased, so that the rotating speed of the steering wheel is higher, the force borne by the steering wheel is larger, the sprayed water flow quickly sweeps surrounding soil, and the situation that the sprayed water is locally accumulated to influence the irrigation effect is avoided. After the two steering water spraying pipes and the two steering wheels are arranged, even if the water pressure is low, enough impact force can be generated, and therefore normal rotation of the steering wheels is guaranteed.

The utility model discloses an intelligent medical examination sample mixer, which relates to the technical field of medical sample mixers.The intelligent medical examination sample mixer comprises a controller, a fixing box is installed outside the controller, a first fixing frame is fixedly connected inside the fixing box, a fixing shaft is installed inside the first fixing frame, and a shear shank is installed outside the fixing shaft; a rotating shaft is rotatably connected to the interior of the shear shank, a sleeve is rotatably connected to the outer surface of the rotating shaft, a control frame is slidably connected to the outer surface of the first fixing frame, and through cooperation of the shear shank, a threaded rod and the control frame, the control frame can be controlled; a movable frame can be driven to move through a threaded rod, a shear shank can be driven to be folded and released through movement of a rotating shaft, the distance between sleeves can be adjusted, a worker can conveniently mix a large number of samples, and the function of adjusting the distance between the sleeves according to the sizes of different sample containers is achieved.

The utility model discloses a clamp tool for gear machining, which relates to the technical field of gear machining equipment and comprises a base, a rotating motor and a rotating shaft are arranged at the top of the base through a support plate, a fixing pin is arranged on the rotating shaft through a telescopic rod, a sliding block and a threaded rod are further arranged at the top of the base through a mounting shell, and a fixing plate is arranged on the sliding block. A collecting tank is arranged in the lower portion of the base, and a grid plate is arranged at the top of the collecting tank. Under the action of the fixing pin, it is guaranteed that the gear can coaxially rotate along with the motor, a worker can conveniently machine the gear, machining scraps can be conveniently collected in cooperation with the collecting groove, and under the action of the limiting plate, the fixing plate and the limiting sleeve, the machining efficiency is improved. The clamp can better meet the clamping and fixing requirements of gears with different sizes, the applicability of the device is improved, and meanwhile the clamping quality is guaranteed.

The invention discloses a detection device and method for accurately measuring the closing time of a steam extraction check valve, belongs to the technical field of valve detection, and aims to solve the problem that the valve closing time of the steam extraction check valve is not accurately measured. The device comprises a fixing support, a suction cup, an electromagnet and a crane, a steam extraction check valve and the fixing support are arranged on a supporting body, a fixed pulley is arranged on the fixing support, a mounting frame is connected with a valve body, an angle sensor, a first travel switch and a second travel switch are mounted on the mounting frame, a pointer shaft is connected with a valve rod, and the angle sensor makes contact with the pointer shaft. When the valve is closed, the swing rod makes contact with the second travel switch, one end of the steel wire rope is connected with the valve clack, the other end of the steel wire rope bypasses the fixed pulley and is connected with the suction cup, the crane is connected with the electromagnet, and the suction cup is attracted to or separated from the electromagnet. Opening and closing positions and time are measured through the timer and the data acquisition device, the assembling and testing method is simple, operation is easy and convenient, safety is high, and measured data are accurate.

The invention relates to a production method of high-purity potassium aurous cyanide, which comprises the steps of gold pretreatment, electrochemical reaction, cooling crystallization and washing and drying, the washing is realized based on the following washing equipment, the washing equipment comprises a washing tank, and the washing tank is provided with a first water inlet pipe; the mixing mechanism comprises a mixing pipe which is rotationally installed, the mixing pipe is in transmission connection to the output shaft end of a driving motor in a gear meshing transmission mode, and the driving motor is connected with a gear through a corresponding one-way bearing; the mixing pipe is of a hollow tubular structure, the backflushing mechanism comprises a second water inlet pipe communicated with the mixing pipe through a corresponding rotary joint, and the mixing piece is of a hollow tubular structure or a hollow plate-shaped structure and is communicated with the mixing pipe; the tail end of the lower side of the mixing part is arranged in a necking shape and is bent towards the same direction to be connected with corresponding nozzles, and the bending direction of the nozzles is opposite to the rotation direction of the mixing pipe driven by the driving motor; and a suction filtration mechanism. On the basis of ensuring the washing quality, the washing frequency is reduced, the washing efficiency is improved, and the vacuum filtration efficiency is further improved.

The invention relates to the technical field of tool clamps, in particular to a clamp device for machining workpieces, which comprises a base, the base comprises a bottom plate, two side plates are symmetrically and fixedly connected to the bottom plate, one ends of the two side plates protrude, and the protruding ends of the two side plates are jointly and fixedly connected with a top plate. A clamping mechanism is arranged on the top plate, the clamping mechanism comprises a first threaded hole formed in the top plate, a bolt is in threaded connection with the interior of the first threaded hole, the bolt is slidably sleeved with a pressing plate, a circular groove is formed in the pressing plate, the bolt penetrates through the circular groove, and the bolt is sleeved with a pressing ring; the pressing ring is located between the pressing plate and the top end of the bolt, the pressing plate extends towards the other end of the side plate, a second threaded hole is formed in the top plate, the second threaded hole is located in the side, away from the other end of the side plate, of the first threaded hole, and a puller bolt is connected into the second threaded hole in a threaded mode.

The utility model discloses a stopper and a vertical warehouse shuttle vehicle system, the stopper comprises a base, the base is provided with a gap in the direction impacted by a shuttle vehicle, a turnover stop block is arranged in the gap, and the base is also provided with a push rod mechanism in the direction of an elevator; the stop block comprises a body and an elastic piece, horizontal movement of the push rod mechanism under the stress effect is converted into rotary movement of the elastic piece, the elastic piece drives the body to turn over under the action of the rotary movement, when the body turns over to be higher than the notch, the shuttle vehicle is stopped, and when the body turns over to be lower than or flush with the notch, the shuttle vehicle is not stopped. The stop block and the gear shaft are linked through the elastic piece, that is, the stop block is driven to rotate through the elastic piece when the gear shaft rotates, the stopper can be buffered to a certain degree through connection of the elastic piece, gear damage or cylindrical head screw deformation is avoided, and the service life of the stopper is prolonged.

The utility model relates to the technical field of wine bottle processing, and discloses an angle-adjustable drying device for wine bottle processing, which comprises a mounting seat, a drying box device fixedly mounted at the top of the mounting seat, a first rack fixedly mounted at the front end of the inner wall of the mounting seat, and a second rack fixedly mounted at the position of the first rack at the rear end of the inner wall of the mounting seat. A first limiting plate is fixedly mounted at the position, located at the upper end of the first rack, of the front end of the inner wall of the mounting base, a second limiting plate is fixedly mounted at the position, located at the first limiting plate, of the front end of the inner wall of the mounting base, and a servo motor is fixedly mounted on the right side of the front face of the mounting base. According to the wine bottle drying device, the rotating support assembly can drive a wine bottle to rotate, meanwhile, the wine bottle can be moved into the drying box device to be rapidly dried, the wine bottle can be subjected to 360-degree hot air drying, the wine bottle does not need to be frequently taken during drying, and the wine bottle drying efficiency is greatly improved.

This utility model relates to a spray arm structure for a cleaning machine and a cleaning machine using the same. It includes an inner tank and a spray arm installed within the inner tank. The spray arm includes a main arm and a secondary arm movably connected to a first end of the main arm. Spray holes are provided on both the main arm and the secondary arm. The rotation center of the spray arm is located on the main arm, and the length between the rotation center and the free end of the secondary arm is greater than the distance between the rotation center and the side walls of the inner tank. During rotation, the secondary arm extends along the length of the main arm under the action of centrifugal force, becoming straight. When the free end of the secondary arm abuts against the side walls of the inner tank while the secondary arm is straight, the secondary arm bends relative to the main arm, becoming non-straight. Compared with the prior art, this utility model expands the spray coverage area of ​​the spray arm, avoids spray dead zones, and improves the cleaning effect of the cleaning machine. It also prevents interference between the spray arm and the side walls of the inner tank, ensuring the normal operation of the cleaning machine.

The utility model discloses urban greening plant planting and maintaining equipment, and belongs to the technical field of urban greening and maintaining. Comprising an upper hoop and a lower hoop, a shaft rod is arranged between the upper hoop and the lower hoop, the shaft rod can annularly rotate around the outer edge of the upper hoop and the outer edge of the lower hoop, the shaft rod is parallel to the axis of the upper hoop, and a winding disc capable of ascending and descending is rotationally arranged on the shaft rod. The lower hoop is fixed to the lower end of a tree trunk, then the upper hoop is arranged above the tree trunk, then the end of the heat preservation cloth is fixed to the tree trunk, the shaft rod is dragged to enable the winding disc to rotate around the tree trunk so that the heat preservation cloth can be wound around the tree trunk, the winding disc ascends and descends along the shaft rod, all-directional winding can be conveniently conducted, the overall structure is simple, and operation is convenient. Power supply cooperation is not needed, and the use limitation and the cost are reduced.

The invention discloses an electric tool self-locking switch and an electric tool, and relates to the field of small electric tools, the electric tool self-locking switch comprises a shell, a trigger movably arranged on the shell and a safety piece rotationally arranged on the shell, a switch body triggered by the trigger is arranged in the shell, the trigger comprises a first abutting part and a first clamping part, and the first abutting part is connected with the first clamping part. The safety piece is provided with a second abutting part and a second clamping part. The safety piece comprises an abutting position and a continuous triggering position, the safety piece is switched between the abutting position and the continuous triggering position through rotation, and when the safety piece is located at the abutting position, the first abutting portion abuts against the second abutting portion, and the trigger cannot trigger the switch body; when the safety piece reaches the continuous triggering position, the second abutting part and the first abutting part are staggered, the second clamping part and the first clamping part are clamped, and the trigger continuously triggers the switch body. The electric tool adopts the electric tool self-locking switch. The electric tool has the advantages that the safety coefficient is high, and starting of the electric tool caused by mistaken touch is not prone to occurring.

The utility model provides an electric screwdriver operation turn number control device which belongs to the technical field of electric screwdrivers and comprises an electric screwdriver body, a driving motor, a power line, a rotating shaft, a screwdriver rod, a driving switch and a control panel, the driving motor is arranged on the inner side of the electric screwdriver body, the power line is electrically connected to the upper portion of the driving motor, and the rotating shaft is installed at the output end of the driving motor. A screwdriver rod is detachably installed on the rotating shaft, and a driving switch is embedded in the upper portion of the right side of the electric screwdriver body. Through the arrangement of the positioning assembly, when the control panel controls the driving motor to stop rotating, the electromagnetic block is controlled to be connected with a power supply, the electromagnetic block generates magnetism to adsorb the gear disc, the gear disc and the rotating shaft are prevented from continuously rotating due to inertia, and the rack is adsorbed by the magnetism generated by the electromagnetic block; the rack moves towards one side of the gear disc along the embedded groove, the rack is meshed with the gear disc, it is guaranteed that the gear disc and the rotating shaft stop rotating, and therefore the effect of controlling the batch rod to stop rotating is achieved, double rotation stopping is achieved, and the effect is better.

The utility model discloses a dustproof cover piece of a manual-automatic integrated door closer, which comprises an uncovered box body and a door closer body, the door closer body is fixedly arranged in the uncovered box body, a guide shaft is arranged on the door closer body, and a panel is fixedly arranged at the upper end of the uncovered box body. The circular dustproof cover is placed on the panel, the guide shaft penetrates through the circular opening and the annular sealing ring, the annular protrusion and the four arc-shaped protrusions abut against the lower end of the circular dustproof cover, the annular insertion block is inserted into the annular insertion groove in the annular positioning block, and therefore the circular dustproof cover can be conveniently and rapidly positioned on the panel; the structure is simple and practical, buffering protection is provided for the circular dustproof cover through the arranged annular protrusion, four arc-shaped protrusions and annular inserting blocks, damage to the circular dustproof cover due to external force such as treading or foreign matter collision is avoided, good sealing is provided for the circular dustproof cover through an annular positioning block and an annular sealing ring made of a wear-resisting rubber product, and the service life of the circular dustproof cover is prolonged. And normal rotation of the guide shaft is ensured.

The utility model provides a motor protector and a high-low gear current regulation limiting device thereof, the high-low gear current regulation limiting device comprises a first limiting piece and a second limiting piece which are arranged on a shell; the flow adjusting knob is rotationally installed on the shell, a gear block is arranged on the flow adjusting knob and rotates between the first limiting piece and the second limiting piece, a first gear face and a second gear face are arranged on the two sides of the gear block respectively, and when the first gear face of the gear block abuts against the first limiting piece, the second gear face of the gear block abuts against the second limiting piece. The rotating position of the current adjusting knob corresponds to the low-level current value mark; when the second gear face abuts against the second limiting piece, the rotating position of the current adjusting knob corresponds to the high-position current value mark. The structure can ensure that the current adjusting knob rotates within a determined range, so that the situation that the current adjusting knob rotates excessively due to misoperation of a user is avoided, and the reliability is improved.

The troweling machine convenient to move comprises a base, walking wheels are arranged at the bottom of the base, a rotating shaft is arranged in the middle of the base in a rotating mode, the rotating shaft can stretch out and draw back up and down, a troweling plate is arranged at the lower end of the rotating shaft, and a protective cover is arranged outside the troweling plate. The protective cover is arranged on the rotating shaft and can synchronously ascend and descend along with the rotating shaft, the protective cover does not rotate along with the rotating shaft, a seat is arranged at the upper end of the base, a rotating driving device is arranged between the base and the seat, and height adjusting devices are arranged on the rotating shaft and the base. The utility model belongs to the technical field of troweling machines, and particularly relates to a troweling machine convenient to move, which solves the problems that when the conventional troweling machine is used for troweling the ground, the height of a troweling plate is inconvenient to adjust, and the conventional troweling machine is inconvenient to walk and steer in a troweling state.

A long-endurance fuel cell tractor relates to the technical field of tractors and comprises a frame, and a cab, a trailer, a hydrogen supply system, a fuel cell system and a high-pressure combined module which are arranged on the frame, the cab is arranged at the end of the frame in a turnover mode, and the trailer and the cab are arranged in a spaced mode and used for loading goods. The hydrogen supply system comprises a plurality of hydrogen cylinders which are sequentially arranged between the cab and the trailer in a stacked mode in the vertical direction, and a preset trailer front rotation interval is formed between the hydrogen cylinders and the cab. The fuel cell system is arranged between the cab and the frame, and the fuel cell system is connected with the hydrogen supply system; the high-voltage combined module comprises an integrated controller and a high-voltage box which are connected, and the integrated controller and the high-voltage box are arranged on any side edge of the frame; and the fuel cell system and the high-voltage box are electrically connected with the integrated controller respectively. The endurance can be effectively increased, meanwhile, front rotation of the whole vehicle is guaranteed, and the convenience of assembly and maintenance is improved through the layout structure.