290results about How to "Achieve dustproof effect" patented technology

The invention discloses an electrical control cabinet. The invention belongs to the technical field of electrical equipment, the cabinet comprises a control cabinet, a shock absorption and bumping prevention mechanism, a dehumidification and water absorption mechanism and a dust prevention and accumulation mechanism, two opening and closing doors hinged to the control cabinet are arranged on the front portion of the control cabinet, a rain-proof shed and an observation window are arranged on the top of the control cabinet, an extension frame is arranged on the rain-proof shed, an illuminatinglamp is arranged on the extension frame, the shock absorption and bumping prevention mechanism comprises a base and a shock absorption assembly, four self-locking universal wheels are arranged at thebottom of the base, and four supporting columns are arranged on the top of the base. The electrical control cabinet has the beneficial effects that the damping and anti-bumping effects on the controlcabinet can be achieved through the damping and anti-bumping mechanism, electrical elements in the electrical control cabinet are prevented from being damaged due to bumping, and the safety of the control cabinet is improved; and dust adhering to the dustproof net can be removed through the dustproof dust accumulation mechanism, and falling dust can be collected in a centralized mode under the action of the dust collection assembly.

The invention relates to the technical field of electronics and discloses a power distribution cabinet with heat-dissipating and dust-preventing functions. The power distribution cabinet with the heat-dissipating and dust-preventing functions comprises a cabinet body and a base, wherein a waterproof hood is fixedly mounted on the top of the cabinet; a connecting block is fixedly mounted on the topend of the cabinet; a first motor is fixedly mounted on the lower surface of the connecting block; the output shaft of the first motor is fixedly connected to a rotating rod; one side of the rotatingrod is fixedly connected to a first bearing; a lead screw is movably connected in the first bearing; the bottom end of the lead screw is movably connected to a second bearing; a nut is in threaded connection to the lead screw; and the upper surface of the nut is fixedly connected to a connecting rod. According to the power distribution cabinet with the heat-dissipating and dust-preventing functions, by arranging the first motor, the lead screw, the nut, the connecting rod and the bearing, the first motor drives the lead screw to rotate to drive the nut on the lead screw to rotate so as to further drive the connecting rod to drive the nut on the lead screw to move up and down, so that a hairbrush driven by the first motor brushes down dust, with relatively small grain size, attached to a dustproof screen, and the dust enters a collecting box.

The invention relates to the technical field of environmental protection. An automatic dust prevention and suppression system of a coal storage yard comprises a water sprinkling system for the coal storage yard, and is characterized by further comprising a coal storage yard data acquisition system for acquiring environmental parameters of the coal storage yard, wherein the coal storage yard data acquisition system is connected with a signal processing system; the signal processing system is connected with the water sprinkling system through a control actuation system. According to the automatic dust prevention and suppression system of the coal storage yard, the environmental parameters such as the dust content and the moisture content of the storage yard can be mastered in real time through the coal storage yard data acquisition system, and a working state of the water sprinkling system is adjusted in real time through the signal processing system according to changes of the surrounding environmental parameters. The automatic dust prevention and suppression system of the coal storage yard realizes intelligent dust suppression of the coal storage yard, so that green and environmentally-friendly transformation and upgrading of the coal storage yard can be realized to push sustainable development of an enterprise with the coal storage yard.

The invention provides a centrifugal cutter. The centrifugal cutter comprises a cutter body, the top surface of the cutter body is provided with a plurality of blades, which are distributed around the central line of the cutter body in a radiating mode, and the cutter body and the blades are of an integrally formed structure. The invention also provides a grass trimmer. By integrating the blades on the upper portion of the centrifugal cutter, during grass trimming, the internal control circuit board and the motor of the grass trimmer can achieve the aims of air circulation and further cooling, meanwhile, meanwhile, pressure difference can be formed between the top and the bottom of a cutter rest and further micro circulation can be formed to exhaust grass clippings and dust, and further dustproof effects can be achieved.

The present invention relates to the technical field of power boxes, especially to a radiation-type power box convenient to control. The objective of the invention is to solve the technical problem that a current radiation-type power box is still operated about a radiation power source to cause energy waste. In order to solve the technical problem, the present invention provides a radiation-type power box convenient to control. The radiation-type power box convenient to control comprises a box body, the middle portion of the inner top wall of the box body is fixedly connected with a control device, one side of the box body is fixedly connected with a radiation device, the radiation device communicates with the box body, the front surface of the box body is hinged with a box door through ahinge, one side of the front surface of the box door is fixedly connected with a handle, one side of the bottom portion of the front surface of the box door is fixedly connected with a grounding device, and the middle portion of the bottom portion of the front surface of the box door is provided with a penetrating radiation window. The radiation-type power box convenient to control is convenient to control a drive motor so as to avoid energy waste and achieve the purpose of energy conservation, environment protection and emission reduction.

The invention relates to the technical field of power supply equipment and discloses a dustproof and dampproof power distribution cabinet which comprises a power distribution cabinet body, wherein aninstallation plate is fixedly arranged in the power distribution cabinet body, a power distributor is fixedly arranged on the front side of the installation plate, a partition plate arranged on the front side of the installation plate is fixedly arranged on one side of the power distributor, a base is fixedly connected to the bottom end of the power distribution cabinet body, a venting hole is formed in the top of one side of the base, a dampproof layer is arranged at the bottom end of an inner cavity of the base, a servo motor is fixedly arranged at the top end of the inner cavity of the base, and an outer wall of the servo motor is fixedly sleeved in the box body at the top end of the inner cavity of the base. The dustproof dampproof power distribution cabinet is provided with the base,the venting hole, the dampproof layer, the servo motor and a fan, so that air around the base can be circulated; by means of air circulation, moisture near the base can be prevented from increasing; as the moisture near the base is reduced, dehumidifying and dampproof effects are achieved, and the power distribution cabinet is ensured to be prevented from the damp phenomenon.

An imaging device unit comprises a CCD chip and a substrate on which the CCD chip is soldered. A light receiving surface is provided in the front surface of the CCD chip. A dustproof member for protect the light receiving surface from dust is attached around the light receiving surface. Chip terminals are arranged between the light receiving surface and the dustproof member. When the CCD chip is pressed against the rear surface of the substrate, the dustproof member is elastically deformed and tightly makes contact with the substrate. Since ultrasound is applied to the chip terminals and the substrate terminals in this state to melt them, the CCD chip is positioned in parallel with the substrate. Upon stopping ultrasound horns, both of the terminals are immediately soldered to each other, so that the CCD chip is securely fixed on the substrate with ease.

The invention relates to the field of home supplies, and particularly relates to a window screen. An electret window screen system capable of purifying the air comprises a window screen main body; the window screen main body comprises window screen meshes and a frame for fixing the window screen meshes; electrets are distributed on the window screen meshes. According to the electret window screen system disclosed by the invention, by the window screen adopting the electrets, in the air circulating process, the electrets can adsorb small particle impurities in the air and takes an air purification effect, and when a rate of air circulation is large, friction can be generated to enable electret threads to electrostatically adsorb large particles so as to achieve a better air purification effect.

The invention discloses a fixed clamping device for machining a gate valve sealing cover. The device comprises a support chassis, a first longitudinal bracket, a second longitudinal bracket, a chuck,a locking bolt, an auxiliary shifting block, a height adjusting mechanism, an inner supporting plate and a circumferential adjusting device. According to the device, the height adjusting mechanism isarranged on the first longitudinal bracket and the second longitudinal bracket, so that the inner supporting plate can be driven to move up and down between the first longitudinal bracket and the second longitudinal bracket after turning a steering wheel, then the position of the chuck at the upper end of the inner supporting plate is adjusted, and the adjustment of the position of a clamped workpiece is facilitated; meanwhile, the circumferential adjusting device is arranged, and the chuck can be connected through a driven gear under the driving of a motor, so that the chuck can be driven torotate, and the circumferential angle adjustment of the clamped workpiece can be carried out during the machining; and a rotary cutter is used for machining, the flexibility is high, machining is convenient, and the working efficiency is improved.

The invention provides a power distribution cabinet with an automatic heat radiation function, and relates to the power distribution cabinet technical field; the power distribution cabinet with the automatic heat radiation function comprises a power distribution cabinet body; a fixed block is fixedly arranged on the bottom of the inner wall of the power distribution cabinet body; the fixed block top is fixedly connected with an exhaust fan through bolts; one side of the exhaust fan is bonded with a fixed plate through a bonding agent; the exhaust fan is arranged, and works to pump out the air in the power distribution cabinet body, so fresh air can enter the power distribution cabinet body so as to provide the heat radiation effect; compared with the prior art, a slide plate is matched with the top plate; when the power distribution cabinet inner temperature rises, a piston drives the slide plate to move upwards; when the slide plate moves upwards, a wiring board makes contacts with wiring posts, thus closing the loop, and providing the intelligent air-exchange heat radiation effect.

The invention discloses a DDR4 card slot anti-dust device and method. The device comprises a heightened frame and an anti-dust membrane, wherein the heightened frame is mounted at the top end of a DDR4 card slot, the middle part of the heightened frame is provided with a through hole, the surface of the top of the heightened frame is covered by the anti-dust membrane, the middle part of the anti-dust membrane is provided with an inserting slot in which a DDR4 memory bank can be inserted, and the inserting slot is located right above the through hole in the middle part of the heightened frame. Compared with the prior art, the DDR4 card slot anti-dust device provided by the invention solves the problem that dust enters the DDR4 card slot, and that a metal Pin vibrating needle in the DDR4 card slot is polluted and oxidized which leads to poor contact, and an anti-dust effect is realized through effectively preventing external dust from entering from a contact position of the DDR4 memory bank and the card slot; the anti-dust device is simple in structure, low in cost, high in universality, and can be applied to the design of other connector card slots with similar structures.

The invention discloses a television set with screen shield for household use, include a first front guard frame, Second front guard frame, A television body and a rear guard frame, the first front protective frame and the second front protective frame are arranged at the front end of the television body, the first front protective frame and the second front protective frame are both provided withinsertion grooves, the two insertion grooves are inserted with protective glass, the inner sides of the first front protective frame and the second front protective frame are provided with fixing plates, balloon balls are evenly arranged on the inside of the fixing plate, the balloon ball is attached to the outer frame of the television body, the outer sides of the first front protective frame and the second front protective frame are both provided with fixed frames, A meshing groove is formed between the fixing frame and the first and second front protective frames, and the rear protective frame is inserted into the meshing groove. A spring is fixed on the inner surface of the rear protective frame, and a shock absorbing plate is fixed on the spring. The shock absorbing plate is attachedto the rear end of the television body. The invention has the advantages of screen protection, external shock absorption buffering and dustproof performance.

The invention relates to the technical field of biological detection equipment, and discloses a microbiological detection device for inspection. The microbiological detection device comprises a detector, function keys are fixedly installed on one side of the front face of the detector, one sides of the function keys are fixedly provided with a display screen located on the front face of the detector, a motor is fixedly installed at one side of the bottom end of an inner cavity of the detector, the outer wall of an output shaft of the motor is fixedly sleeved with a winding drum I, one side ofthe winding drum I is movably sleeved with a threaded rod located inside the detector, one end of the threaded rod penetrates through a partition plate and is fixedly sleeved with a winding drum II, and the bottom of the inner cavity of the detector is fixedly sleeved with the partition plate. According to the microbiological detection device for inspection, by arranging a detection utensil, a clamping column, a movable rod, a lower rack, an upper rack, a connecting rod I, a tension spring I and a limiting box, the detection utensil can be clamped, it can be ensured that the detection utensilcannot vibrate in the operation process, and the detection utensil is limited while stable operation is achieved.

The invention discloses a heat radiation fireproof type electrical cabinet comprising a moisture-proof base, a cabinet body and an equipment cabinet. The cabinet body is installed on the moisture-proof base, and the equipment cabinet is installed at the top part of the cabinet body. The equipment cabinet is internally provided with a control cabin and a gas tank cabin. A gas storage tank is installed in the gas tank cabin. Inert gas is arranged in the gas storage tank, and a gas ejecting pipe is fixedly connected at the gas outlet end of the gas storage tank. One end, which is away from the gas storage tank, of the gas ejecting pipe extends to the top end in an installing cavity and is provided with a flow dividing valve in a fixed connection way. The bottom part of the flow dividing valve is evenly provided with nozzles. A fire sensor is installed at the top end in the installing cavity of one side of the flow dividing valve, and a temperature sensor is installed at the top end in the installing cavity of the other side of the flow dividing valve. The moisture-proof base is arranged in the cabinet body and rollers are installed at the bottom part of the moisture-proof base so that the cabinet body can be prevented from being affected by damp and movement and carrying of the cabinet body can also be facilitated.

The invention discloses a frame earth stud of a solar photovoltaic module capable of eliminating an oxide layer, comprising a stud bolt, a screw nut and a scraping piece, wherein the stud bolt comprises a stud bolt head and a screw; the cylinder of the screw is provided with at least one groove which extends along an axial direction of the screw; the screw nut is in bolted connection with one end, far away from the stud bolt head, of the screw; the scraping piece is sleeved on the screw and arranged between the stud bolt head and the screw nut; a contact surface of the scraping piece and the screw is provided with a lug which is matched with the groove on the stud bolt; and one face facing to the screw nut, of the scraping piece is provided with at least one protruding edge strip. The scraping piece which can realize synchronous rotation with the stud bolt is added at the other side of a frame opposite to the screw nut, so that the oxide layer or a coating is eliminated at a contact position of the frame, thus earth wires electrically contact with a metal frame preferably by the scraping pieces, thereby obtaining lower contact resistance and simplifying operations of installing the earth wires.

The invention discloses a display screen with a dust prevention function for a medical facility. The display screen comprises a screen main body, rotating handles and traction lines, wherein two sidesof the screen main body are connected with rotation support rods through fixing shafts, sheltering cloth is arranged in the middle of the screen main body, a sliding block is clamped inside each rotation support rod, the part between the sliding blocks is connected with the sliding base through a first rotation shaft, and a brush head is fixed to the top end of the sliding base. For the display screen with the dust prevention function for the medical facility, the dust removal work can be well carried out at the upper part of the whole display screen under the effects of the sliding blocks, meanwhile, the upper part of the whole display screen can be well sheltered under the effect of the shielding cloth, thus the effect of preventing dust for the upper part of the liquid crystal screen is achieved, the data can be conveniently observed, and further, the service life of the whole display screen main body is prolonged.

The invention discloses a computer case with a shock-proof function. The computer case comprises a rack, wherein side plates are fixedly arranged on the side surfaces of the rack; the upper part of the inner side of each side plate is fixedly provided with a power supply shock-proof pad; a cooling hole plate is arranged below each power supply shock-proof pad; the lower part of the rack is movably provided with a U-shaped sleeve; the outer surface of the bottom of the rack and the inner surface of the bottom of the U-shaped sleeve are connected by at least one group of parallel elastic components and damping components; the top cover of the rack is also provided with a dust-proof net; a cooling fan is arranged below the dust-proof net in the rack. The computer case with the shock-proof function has the advantages of simple structure and good shock-proof function. The junction of the outer surface of the bottom of the rack and the inner surface of the bottom of the U-shaped sleeve is provided with at least one group of parallel elastic components and damping components, so inner electronic components are effectively prevented from damage when the case shocks, and an effect on dust prevention can be effectively achieved in a manner that the top cover and the bottom plate of the rack are respectively provided with the dust-proof net.

The invention discloses an automatic dust removal device in an electrical automation power distribution cabinet. The device comprises a power distribution cabinet, air blowing mechanisms are arrangedon two sides of the interior of the power distribution cabinet respectively; the air blowing mechanisms comprise fixed pieces, sliding rods, lead screws, movable pieces, air blowing covers and motors.The fixed pieces are installed at two ends of two sides of the interior of the power distribution cabinet respectively. The sliding rods are installed between the fixed pieces, the lead screws are movably installed on inner sides of the sliding rods between the fixed pieces through bearings, the movable pieces are movably installed on outer sides of the lead screws through threads, two ends of the movable pieces are arranged on outer sides of the sliding rods in a sleeving mode, and the air blowing covers are installed on the sides, away from the lead screws, of the movable pieces. A controlbox controls the air blowing mechanisms to blow air to the inner side of the power distribution cabinet, then dust deposited on components is excited, meanwhile, a dust suction mechanism is started through the control box to suck the excited dust to an inner side of a collection box, and then the automatic cleaning of the dust on the inner side of the power distribution cabinet is achieved.

The invention discloses a waterproof tensile insulator with a dustproof function. The waterproof tensile insulator comprises a mounting column. The front surface of the mounting column is fixedly connected with a mounting rack; a body box is fixedly connected to the right side of the top of the mounting rack; an insulating sleeve and a mounting frame are fixedly connected to the top and the bottomof the inner wall of the body box respectively; movable rods are fixedly connected between the two sides of the top of the inner wall and the bottom of the mounting frame; and supporting frames are movably connected to the surfaces of the movable rods. The invention relates to the technical field of insulator equipment. According to the waterproof tensile insulator with the dustproof function, amovable box is driven by the power of a first electric rod to move up and down, in the moving process, a water conveying pipe is used for driving a cleaning head to carry out micro cleaning on the surface of the insulator, and a second electric rod drives a cleaning brush to brush the surface of the insulator when the insulator is cleaned, so that the dustproof effect of an insulator body is achieved; and the whole device is reasonable in structural design, obvious in dustproof and dust removal effect and suitable for popularization and development.

The invention discloses an electrical device with a heat dissipation structure, which comprises a cabinet body, the cabinet body is provided with a cabinet door, a turbofan is clamped on the inner wall of the cabinet body through a through hole, filter nets are provided on both sides of the turbofan, the cabinet body There are cold air chambers on both sides of the body, and a cooling fan is installed in the cold air chamber. The top of the cabinet is equipped with an air outlet pipe, a filter box, an exhaust pipe and an air negative pressure machine. The filter box is divided into a porous foam layer, a filter layer and a support layer. In order to solve the shortcomings of the switch cabinets in the prior art, the present invention proposes an electrical device with a heat dissipation structure. The cabinet body and cabinet door are sealed, and the turbofan automatically generates strong power through the dual effects of negative pressure and temperature difference. Cool air, and form a cold air vortex, to carry out powerful blowing heat dissipation on the cabinet body, high heat dissipation efficiency, wide range of cold air diffusion, no heat exchange dead zone, so as to meet the heat dissipation requirements of modern electronic equipment, and at the same time have the effect of dustproof and moisture-proof .

The invention discloses a dustproof heat dissipation power distribution cabinet for the expressway, which comprises a hollow power distribution cabinet shell, wherein a first mounting cavity is formedin the top wall of the power distribution cabinet shell, an air collection chamber is welded to the inner bottom wall of the power distribution cabinet shell, a plurality of air inlet holes are formed in the bottom wall of the air collection chamber, the power distribution cabinet shell is rotatably connected with a rotating shaft through a bearing in a penetrating mode, the end, which is locatedoutside the power distribution cabinet shell, of the rotating shaft is in interference fit with a wind wheel, a rotating disc is glued to the end, which is located in the first mounting cavity, of the rotating shaft, the power distribution cabinet shell and the air collection chamber are jointly and fixedly connected with a plurality of conductive pins in a penetrating mode, and the ends, which are located in the air collection chamber, of the conductive pins are sharp ends. The power distribution cabinet has the advantages that ventilation can be performed in the power distribution cabinet forcibly, a better heat dissipation effect is achieved, dust can be prevented from entering the power distribution cabinet, damage to components of the power distribution cabinet caused by the dust isavoided, and meanwhile, the temperature of the power distribution cabinet can be monitored in real time.

The invention discloses a movable type fire extinguisher storage device. The movable type fire extinguisher storage device comprises a supporting platform and a foot rest lever, wherein the right sideof the supporting platform is fixedly connected with a vertical beam; the left side of the vertical beam is fixedly connected with an accommodating barrel which is vertically arranged through a connecting rod; a partition which is in sliding fit to the inner side wall of the accommodating barrel is arranged inside the accommodating barrel; the top of the accommodating barrel is hinged with a cover plate which is matched with the upper opening end of the accommodating barrel; a guide hole is reserved in the bottom plate of the accommodating barrel; the upper end of a slide rod which is arranged in the guide hole in a sliding mode is fixedly connected with the bottom centre of the partition; the lower end of the slide rod is hinged with the left end of the foot rest lever; the foot rest lever sleeves outside the supporting shaft through a long circular hole in the middle of the foot rest lever; the supporting shaft is fixedly connected to the lower part of the vertical beam perpendicularly; and two pairs of rollers are symmetrically arranged at left and right sides of the lower part of the supporting platform. The movable type fire extinguisher storage device can effectively achievethe dustproof effect, can be convenient for moving the position of a fire extinguisher, and is convenient for taking the fire extinguisher.

The invention discloses a triangular wire drawing machine with a dustproof device. The triangular wire drawing machine comprises a rack, a motor, a triangular engine cover, abrasive belts and a work table, wherein the triangular engine cover is fixedly connected to the rack; the work table is located below the triangular engine cover; a driving wheel and two driven wheels are respectively arranged on the three corners of the triangular engine cover and connected through the abrasive belts; and the motor is connected with the driving wheel through a driving belt. The triangular wire drawing machine is characterized in that a dustproof top is sleeved above the work table and at the outer side of the triangular engine cover, a working opening for the operation of an operator is processed at the middle part of a front end panel of the dustproof top downwards, and a dust collection groove is arranged at the bottom of the rack. The invention solves the problem that in the prior art, the working part of the triangular wire drawing machine is at an exposed state so that the dust easily flies on the surrounding of the machine and in the workshop with flowing personnel to bring influence for the health of the operators. The invention provides a triangular wire drawing machine with anti-dust device which is good in anti-dust effect and protects the health of the operators.

The invention provides a camera system and a mobile terminal. The camera system comprises a camera mechanism, a supporting seat for supporting the camera mechanism, a stopping piece for limiting the displacement of the supporting seat, a driving assembly connected to the processor, a transmission assembly and a detector connected with the driving shaft. The driving assembly comprises a driving shaft and a sliding block arranged on the driving shaft in a sleeving mode and capable of moving in the axial direction of the driving shaft, and the sliding block is in threaded fit with the driving shaft. The transmission assembly comprises a supporting shaft; one end of the supporting shaft is connected with the sliding block, the other end of the supporting shaft is connected with the supportingbase, the supporting shaft forms a limiting part in the axial direction, and the sliding block pushes the supporting base and the camera mechanism to move axially through the limiting part. The detector comprises a rotating part connected with the output end of the driving shaft and synchronously rotating with the driving shaft, and a counting part for recording motion data of the rotating part, and the counting part is electrically connected with the processor so as to transmit the motion data to the processor; the processor adjusts the driving assembly according to the motion data.

The invention relates to a dustproof ratchet wrench which comprises a main body, a driving body and a dustproof ring. The second side of the head of the main body is provided with a flange with a butting surface. The second end of the driving body is provided with a butting surface. The dustproof ring is arranged between the two butting surfaces. The natural height of the dustproof ring is larger than the vertical distance between the butting surface and the butting surface of the driving body. The dustproof ring comprises three longitudinal sealing units, each longitudinal sealing unit has one thickness along the longitudinal axis, and the thickness of the longitudinal sealing unit is smaller than the distance between the butting surface of the driving body and the butting surface of the head along the longitudinal axis, therefore each longitudinal sealing unit can not be simultaneously extruded by the two butting surfaces, the driving body can smoothly rotate relative to the head of the main body, and the dustproof effect can be achieved.

The invention discloses a hidden-type ceiling projection screen box. The hidden-type ceiling projection screen box comprises a sliding plate box, wherein a screen box main body and a motor are arranged at an upper side of the sliding plate box, a fourth gear is connected with the motor and is engaged with a rotation ring, an annular sliding block is arranged on a side wall of the rotation ring andis connected with an annular sliding groove, broken teeth is arranged on an inner side wall of the rotation ring and are movably engaged with a second gear, an inner end of the second gear penetratesthrough the sliding plate box and extends to a sliding cavity, an outer side of the rotation ring is engaged and connected with a first gear, the first gear is connected with a winding shaft, and thewinding shaft is used for winding a screen. The screen box main body can be hidden on a ceiling, the opening and the closing of a sliding plate are controlled by the motor, so that the closing of a bin opening and drooping and winding of the screen are controlled; the device is ingenious in design and is convenient to use, the whole device is hidden on the ceiling and is provided with a switch mechanism, dust prevention is facilitated, the office space is not occupied, and the integral layout of an office environment cannot be damaged.

The invention belongs to the technical field of mechanical equipment, and particularly relates to a chassis mounting structure for an industrial robot. The chassis mounting structure comprises a baseassembly and a connecting assembly arranged on the base assembly. The base assembly comprises a base, a supporting cylinder and supporting blocks, the supporting cylinder is integrally arranged at thetop of the base, the supporting blocks are uniformly arranged along the periphery of the supporting cylinder, and every two adjacent supporting blocks, the base and the supporting cylinder form a mounting groove, and the side wall, corresponding to each mounting groove, of the supporting cylinder is provided with an air inlet. Torque transmission of the output end of a motor is facilitated, a positioning support effect is achieved, the dynamic performance of a shaft system is effectively improved, the pressure of the output end of the motor is reduced, the stable operation of an actuating mechanism is facilitated, the service life of the shaft system can be prolonged, the circulation speed of air around the motor can be accelerated, the heat dissipation effect of the chassis mounting structure is improved, the dustproof effect is achieved while heat dissipation is facilitated, and stable operation of the machine body is guaranteed.

The invention belongs to the technical field of precision machining, and provides a grinding wheel assembly for small-modulus gear grinding and an assembling method to solve the grinding problem of small-modulus gears. The integrated structure of a grinding wheel cantilever frame and a built-in belt pulley is adopted, so that high installation and positioning precision and the compact structure are achieved; a bearing adopts a V-shaped positioning mode, so that disassembling and installation positioning are convenient; a plurality of evenly distributed threaded holes are formed in a locking nut in an integrated mode and used for adjusting the dynamic balance of a rotating part in the grinding wheel assembly, so that vibration reduction and noise reduction of the grinding wheel assembly areachieved, and the service life of a system is prolonged; and a U-shaped groove is formed in the shaft shoulder of a grinding wheel main shaft for transmission of an O-shaped belt, and the dustproof effect is achieved through the labyrinth sealing principle. The grinding wheel assembly has the advantages of being compact in structure, convenient to disassemble, high in positioning precision, convenient to operate and the like, grinding of small-modulus outer gears and inner gear rings is achieved, and good market application prospects and popularization value are realized.

The invention discloses a heat dissipation device for circuit boards, which comprises an installation shell. An installation frame is fixedly installed on the bottom inner wall of the installation shell. A circuit board body is fixedly installed on the top of the installation frame. A temperature sensor is installed on the circuit board body. Two vertically arranged fixing plates are fixedly installed on the top inner wall of the installation shell. A horizontally arranged sliding plate is installed in a sliding manner between the two fixing plates. A first threaded rod and a rotary motor which are vertically arranged are installed on the top inner wall of the installation shell. The first threaded rod and the rotary motor are located between the two fixing plates. The top end of the firstthreaded rod is rotationally connected with the top inner wall of the installation shell. The rotary motor is fixedly connected with the top end of the installation shell. A vertically arranged second threaded rod is fixedly installed on the output shaft of the rotary motor. The heat dissipation device for circuit boards has an ingenious structure, is convenient to use, and has a good dust-prooffunction while guaranteeing good heat dissipation.

The invention relates to the technical field of servers, in particular to a stable big data server. The stable big data server comprises a server. The bottom of the server is installed on the inner wall of a machine shell through a ventilation structure. A door body is rotationally arranged on one side of the machine shell through hinges. A handle is fixedly mounted on the outer side of the door body. Rollers are fixedly installed at the bottom of the machine shell. Wire fixing structures are fixedly installed on the inner walls of the two sides of the interior of the machine shell and locatedbelow the ventilation structures. A heat dissipation groove is fixedly formed in the inner side of the lower portion of the back face of the machine shell. A dustproof structure is fixedly installedbelow the back surface of the shell and is positioned on the outer side of the heat dissipation groove. A first heat dissipation structure is fixedly installed on the surface of the inner wall of theback face of the machine shell, a second heat dissipation structure is fixedly installed on the surface of the inner side of the door body, and the second heat dissipation structure and the first heatdissipation structure are the same in structure. The stable big data server is very good in heat dissipation effect, high in stability, good in buffering and damping effect and worthy of popularization.