1458results about How to "Reduce looseness" patented technology

Alloy elements are reasonably matched, N and nitrides are added to form elements such as tungsten W, vanadium V, niobium Nb, cobalt Co, rare earth RE and the like for microalloying smelting, a forged and rolled material finished product is subjected to proper heat treatment, and the stainless steel subjected to heat treatment has good heat treatment performance through metallographic observation. According to the stainless steel, nanoscale carbides are separated out in a solid solution state, and fine particles mainly containing nitrides are dispersed and separated out in crystals in a thermodynamic state, so that the material is strengthened and does not diffuse to a crystal boundary, and the room-temperature mechanical property and the high-temperature mechanical property of the material are greatly improved; and when the stainless steel material produced by the method is used for manufacturing related products, the thickness of the stainless steel material can be reduced, and the overall input of the stainless steel material is greatly reduced, so that the large-scale application of noble metal strategic resource nickel is saved, and the aims of saving resources, energy and investment are fulfilled.

The invention relates to the technical field of cables, and provides a low-voltage power supply cable which comprises a plurality of conductive cables, each conductive cable comprises a plurality of stranded conductors, and each stranded conductor is coated with an insulating layer; the plurality of insulating layers are arranged on the inner side of the inner lining layer, the plurality of stranded conductors are all arranged inside the inner lining layer, the space between the inner lining layer and the plurality of insulating layers is filled with a filling layer, the outer part of the inner lining layer is coated with a sheath layer, the end part of each sheath layer is slidably sleeved with the butt-joint cylinder, the stringing assembly is arranged on the butt-joint cylinder, and the heat dissipation assembly is arranged on the inner lining layer. A conductive frame is arranged between every two opposite butt joint cylinders, a conductive assembly is installed on each conductive frame, and a heat dissipation assembly is installed on each conductive assembly. Through the above technical scheme, the problems that in the prior art, due to the fact that high current density is prone to occurring at the butt joint position of two cables, the local temperature of a contact point rises, and the heat dissipation effect is poor are solved. And a gap is generated between the two cables, so that the current transmission performance is influenced.

The invention relates to the technical field of batteries, and discloses a riveting top cover, a battery cell cover plate and a battery cell. Wherein the riveting top cover comprises a riveting block and a pole column, the riveting block is provided with a through hole, the through hole comprises a matching hole, a secondary riveting hole and a main riveting hole which are coaxially arranged in sequence, the pole column comprises a base and a protruding part arranged on the base, the protruding part is provided with a matching section, a secondary riveting section and a main riveting section which are in one-to-one correspondence with the matching hole, the secondary riveting hole and the main riveting hole, and the matching section, the secondary riveting section and the main riveting section are in one-to-one correspondence with the matching hole, the secondary riveting hole and the main riveting hole. The first annular cavity is reserved between the secondary riveting section and the secondary riveting hole in the pre-assembly state, the second annular cavity is reserved between the main riveting section and the main riveting hole, and the first annular cavity and the second annular cavity respectively reserve material expansion spaces for the secondary riveting section and the main riveting section. Therefore, part of the first annular cavity can be filled with the secondary riveting section after the secondary riveting section expands under the action force, the phenomenon that the riveting block is locally expanded or deformed due to expansion of the secondary riveting section in the traditional riveting process is avoided, and the yield of the riveted top cover is improved.

The utility model discloses a cover plate assembly, a battery, energy storage equipment and electric equipment. The cover plate assembly comprises a cover plate and an insulating plate, the insulating plate is arranged on one side of the cover plate, the cover plate and the insulating plate are provided with pole holes allowing poles to penetrate through, and the insulating plate is provided with chip embedding holes used for fixing chips. According to the cover plate assembly provided by the embodiment of the utility model, the chip can be fixed in the chip embedding hole by arranging the chip embedding hole on the insulating plate, so that the chip and the insulating plate are connected more tightly, the chip and the cover plate assembly are connected more tightly, the looseness and displacement of the chip are reduced, and the reliability of the cover plate assembly is improved. The stability and reliability of chip function operation can be improved, and the structure compactness of the cover plate assembly can be improved.

According to the composite protective coating for the bolt surface, the preparation method and the application, the composite coating takes a bolt of a common model of an iron tower as a substrate, and a cathode arc ion plating technology and a magnetron sputtering technology are combined; the preparation method comprises the four main steps of substrate surface pretreatment, metal bonding layer preparation, metal nitride bearing layer preparation and surface molybdenum disulfide solid self-lubricating layer preparation. According to the method, reliable preparation of the composite coating on the complex thread surface of the bolt is achieved, the anti-loosening capacity of the bolt is remarkably improved through the low friction coefficient, good bearing capacity and excellent wear resistance, and meanwhile the composite coating further has good corrosion resistance and has wide application prospects in iron towers for communication, electric power and the like.

The invention discloses a transformer with a leading-out mechanism, and relates to the technical field of transformers. The transformer comprises a transformer body, a plurality of high-voltage wire outlet ends are fixed to one side of the top of the transformer body, a plurality of low-voltage wire outlet ends are fixed to the other side of the top of the transformer body, a protective shell is fixed to the top of the transformer body, and a plurality of vertical plates are fixed to the top of the transformer body; and an opening for accommodating the vertical plate is formed in one side of the protective shell. Through the arrangement of the anti-dragging device, the screw rod, the arc clamping plate and the limiting rod are matched to drive the arc clamping plate to clamp and fix the guide wire, so that the guide wire can be firmly fixed at a specified position, and the situation that the guide wire is loosened or falls off due to external force (such as collision or dragging of a worker during operation) is reduced; therefore, the stability of electrical connection can be ensured, and the problem of electrical failure or poor contact is avoided.

The invention discloses a multi-point grounding current limiting device, and relates to the technical field of power transmission line construction, the multi-point grounding current limiting device comprises a placement frame and further comprises a protection assembly, a grounding rod is fixedly installed at the bottom of the placement frame, a placement plate is fixedly installed on the inner wall of the placement frame, and a placement rod is fixedly installed at the top of the placement plate; lifting equipment is arranged on the circumferential surface of the placement rod, a signal receiver is fixedly mounted at the top of the lifting equipment, a current limiting assembly is arranged at the top of the placement plate, a fusing assembly is arranged at the top of the placement plate, a grounding connecting wire is arranged between the fusing assembly and the current limiting assembly, and a limiting frame is fixedly mounted at the top of the placement plate. According to the grounding current limiting device, the L-shaped plate moves downwards to drive the limiting plate to move downwards, the limiting plate moves downwards to make contact with the grounding connecting wire and extrude and fix the grounding connecting wire, the optimal state of the grounding connecting wire can be kept by avoiding bending or pulling, low grounding resistance is ensured, and therefore the efficiency and safety of the grounding current limiting device are improved.

The invention relates to the technical field of high-density packaged chips, in particular to a high-density packaged chip and a packaging structure, the high-density packaged chip comprises a mounting shell, a cover plate, a positioning mechanism and a circuit connecting mechanism, a substrate is arranged in the mounting shell, a mounting groove is formed in the substrate, and a chip is placed in the mounting groove; the cover plate is arranged at the top of the mounting shell; a silver paste bonding layer is arranged in the mounting groove and is used for fixing the chip; a heat-conducting plate is arranged at the top of the chip; the positioning mechanism comprises a positioning plate, a positioning bolt and a clamping block; the positioning plate is arranged above the heat conducting plate, the clamping blocks are arranged at the two ends of the positioning plate, and the inner walls of the ends, extending out of the mounting shell, of the clamping blocks are clamped with the outer side wall of the mounting shell; a positioning hole is formed in the base plate; a positioning bolt is arranged at the bottom of the positioning plate; a plurality of welding spots are arranged on the two sides of the top of the heat conducting plate and connected with the circuit connecting mechanism. The packaging structure provided by the invention has good thermal conductivity, and provides enough space for integration of other elements while ensuring stable installation of the chip.

The utility model discloses a sewage treatment conveying structure which comprises a box body, one side of the box body is fixedly connected with a water diversion pipe, the other side of the box body is fixedly connected with a drainage pipe, the top of the box body is in threaded connection with a plurality of screw rods, the screw rods are symmetrically arranged, and the outer sides of the screw rods are movably connected with cover frames. A top plate is fixedly connected to the inner side of the cover frame, the guide plate is fixedly connected to one side of the interior of the guide plate, external sewage subjected to coarse filtration is introduced into the box body from the water guide pipe, most impact force can be effectively relieved through fractional blocking of the guide plate, then sewage with a relatively gentle flow speed is filtered in a layered mode through a coarse filter screen and a fine filter screen, and the sewage can be discharged from the box body. According to the sewage filtering device, particle impurities in sewage are blocked, the filtered sewage is conveyed to the next procedure through the drainage pipe, the situation that the particle impurities which can be retained on the surface of the filtering net originally penetrate through the filtering net under the pushing of impact force can be effectively reduced, and the filtering effect is effectively improved.

The utility model discloses a combined type double-end drilling tool which comprises a first drill tip and a second drill tip which are oppositely arranged, a first connecting block is arranged at the bottom of the first drill tip, a second connecting block is arranged at the bottom of the second drill tip, a first thread is arranged on the outer side of the first connecting block, and a second thread is arranged on the outer side of the second connecting block. And internal thread connecting pipes are arranged on the outer sides of the first connecting block and the second connecting block. According to the first drill tip and the second drill tip which can be separated, the adaptability of the tool is improved, and a user is allowed to rapidly replace the drill tips according to different operation requirements. And meanwhile, the first connecting block and the second connecting block are connected and fixed through the internal thread connecting pipe, so that the connecting stability is ensured, and the loosening or falling risk in the working process is reduced. The design of the sliding rail and the sliding block ensures that the first drill tip and the second drill tip can be aligned in position when being combined, so that the first drill tip and the second drill tip can be easily connected through the internal thread connecting pipe.

The invention discloses automatic milling machining equipment for motor shaft manufacturing, and relates to the technical field of motor shaft machining, the automatic milling machining equipment comprises a machining table and further comprises a fastening device, a U-shaped frame is fixedly installed at the top of the machining table, a servo motor is fixedly installed on the front side of the U-shaped frame, a lead screw is fixedly installed at the output end of the servo motor, and the fastening device is fixedly installed on the top of the machining table. A sliding frame is slidably mounted on the inner wall of the U-shaped frame, the sliding frame is in threaded connection with the lead screw, a V-shaped plate is fixedly mounted on the inner wall of the U-shaped frame, a placing plate is fixedly mounted at the top of the machining table, and the fastening device comprises an electric push rod, a fastening plate, a connecting plate, a connecting rod, a square plate, a connecting spring and a positioning plate. The positioning plate moves to be in contact with the columnar workpiece and extrudes and positions the columnar workpiece, and the position of the columnar workpiece can be effectively controlled through the positioning plate before milling through pre-positioning, so that the size error or the surface unevenness caused by position deviation is avoided.

The invention relates to the technical field of soil fertilization, in particular to a wheat biological membrane compound fertilizer and a fertilization device thereof.The wheat biological membrane compound fertilizer comprises a fertilization rack and a composting bin, a traction assembly combined with an agricultural locomotive is fixedly arranged on the fertilization rack, walking wheels are installed at the two ends of the fertilization rack, and the composting bin is fixedly installed above the fertilization rack; a plurality of groups of fertilizer distributing pipes are movably mounted at the middle lower part of the fertilizer applying rack, and the fertilizer distributing pipes are positioned below the composting bin. The problems that according to an existing fertilization device, the combination mode between fertilizer and soil after fertilization is difficult to change according to soil properties, the fertilization distance between the fertilizer and wheat seedlings is difficult to control, and the probability of seedling burning or rapid nutrient loss is increased are solved.

The invention relates to an aluminum alloy cable connector, and belongs to the technical field of cable installation. The aluminum alloy cable connector comprises a crimping pipe, two insulating threaded pipes and two threaded sleeves, the two insulating threaded pipes are fixedly connected to the two ends of the crimping pipe respectively, and the two threaded sleeves are in threaded connection to the opposite ends of the two insulating threaded pipes respectively; the sealing device is arranged on the surface of the crimping pipe in a sleeving manner; a user only needs to rotate the threaded sleeve to perform internal and external sealing operation at the same time, and in the process, the first internal sealing mechanism not only can perform double sealing on a gap between the aluminum alloy cable and the insulating threaded pipe, but also can firmly bond the aluminum alloy cable and the insulating threaded pipe together, so that the sealing effect is good. Therefore, the aluminum alloy cable protection layer and the insulation threaded pipe are connected more tightly, and the overall connection strength of the connector is improved.

The invention relates to the technical field of electric energy meters, and discloses a guide rail type electric energy meter which comprises a shell and a guide rail, a sliding groove is formed in the bottom of the shell, the shell is installed on the guide rail in a sliding mode, a pair of wire inlet holes are formed in one end of the shell, a wiring hole is formed in the top end of the shell, and a pair of wire outlet holes are formed in the other end of the shell. A wiring board used for wiring is fixedly installed in the shell, a wire pressing mechanism is arranged above the wiring board, a binding post is movably installed in the wiring hole and penetrates through the wiring board, a wire pressing plate used for pressing wires is arranged on the binding post, and a compression spring is clamped at the bottom end of the binding post. The cover plate is movably clamped with the shell, and when the cover plate is closed, the cover plate abuts against the binding post and drives the wire pressing plate to press a wire end on the wiring board. An operator only needs to insert a wire end and then cover the cover plate, and does not need to screw a bolt, so that the installation time is greatly shortened, and the installation efficiency is improved.

The utility model discloses a rapid assembly assembly for trims in a bus driving area, which comprises a front top and a door piece, a driver top and a door piece are arranged on one side of the front top and the door piece, a passenger door top and a door piece are arranged on the other side of the front top and the door piece, a rear partition is arranged at the rear ends of the driver top and the door piece and the passenger door top and the door piece, and a rear partition is arranged at the rear end of the front top and the door piece. And support assemblies are arranged at the upper ends of the front roof and door piece, the driver roof and door piece, the passenger roof and door piece and the rear partition. According to the rapid assembly assembly for the trim parts in the bus driving area, the assembly process of the front area of the cab is optimized, the installation efficiency is improved, the strict appearance quality requirement is met by enhancing the structural stability and reducing the assembly error, in the practical application, the assembly part can be rapidly connected and fixed with a cab body framework, and the assembly is convenient to use. And subsequent reworking adjustment is not needed, and the loading efficiency and practicability are remarkably improved.

The invention discloses a full-size wind tunnel high-load blade, which relates to the technical field of wind tunnel equipment and comprises a metal blade root, a hollow main beam and a blade body, a main beam connecting section is arranged at one end of the metal blade root, and the side wall of the main beam connecting section is a first conical side wall surface; the large opening end of the first conical side wall face is closer to the end, provided with the main beam connecting section, of the metal blade root than the small opening end of the first conical side wall face. The hollow main beam is formed by wrapping a carbon fiber cloth layer; a blade root connecting section is arranged at one end of the hollow main beam and fixedly arranged on the main beam connecting section in a sleeving mode. The inner side wall of the blade root connecting section is a second conical side wall face, and the second conical side wall face is attached to the first conical side wall face. The blade body is made of a carbon fiber material; and the blade body is fixedly arranged on the hollow main beam. The lightweight design degree of the blade is improved, and the lightweight effect of the blade structure is achieved.

The utility model provides a wireless temperature measuring device which comprises a wireless temperature measuring host, an outer shell is arranged on the wireless temperature measuring host, a display is arranged at the front end of the outer shell, a control button is arranged below the display, a wireless temperature sensor is arranged in the wireless temperature measuring host, and the wireless temperature sensor is connected with the wireless temperature measuring host. An electric alloy sheet is arranged in the wireless temperature sensor, a temperature probe is arranged on the inner side of the electric alloy sheet, the electric alloy sheet is sleeved with three silica gel sheaths, and sheath threads are arranged on the inner side of each silica gel sheath. According to the utility model, the silica gel sheath is arranged on the electric alloy sheet, so that the durability and the stability of the electric alloy sheet are improved. The silica gel sheath has good high temperature resistance and elasticity, can buffer the attachment between the tested part and the power taking sheet, and reduces the looseness caused by temperature change or external factors.

The invention discloses a power grid cable connection auxiliary device which comprises an insulating shell, a connector is slidably connected to the top of the insulating shell, a fixing frame is fixedly connected to the top of the connector, a fixing ring is fixedly connected to the top of the fixing frame, a conductive base is fixedly connected to the interior of the insulating shell, and a sliding cylinder is fixedly connected to the front face of the conductive base. A gas guide rod is fixedly connected to the front face of the conductive seat, a conductive tube is fixedly connected to the interior of the sliding cylinder, a buffer head is slidably connected to the interior of the conductive tube, the top of the insulating shell communicates with a flow divider, a rod-shaped gas valve is slidably connected to the front face of the flow divider, and a gas valve connecting block is fixedly connected to the front face of the rod-shaped gas valve. According to the device, by means of the poor contact separating mechanism and the conductive effect maintaining mechanism, loosening of the cable connecting position is relieved, the loosened cable is automatically pushed away when contact is poor, and the safety of a line is improved.

The utility model relates to the technical field of water meters, and discloses a water meter capable of being quickly disassembled and assembled, which comprises a water meter main body and pipelines, the pipelines are respectively arranged on two sides of the water meter main body and comprise a fixed pipe and a connecting pipe, the fixed pipe is connected to the side part of the water meter main body, and the connecting pipe is detachably arranged at the end part of a fixed block. A lantern ring is jointly arranged on the outer sides of the fixing pipe and the connecting pipe, a mounting groove is formed in the fixing pipe, an extrusion assembly is mounted in the mounting groove, through the arrangement of the extrusion assembly, the connecting pipe is in threaded connection to the side portion of the fixing pipe, the rotating head is in threaded connection to the end portion of the fixing pipe, and meanwhile a baffle extrudes a first telescopic column and a first spring; the rebounding force of the first spring enables the threaded connection to be tighter, so that the fastening performance of the threaded connection is effectively improved, the reliability of the joint is ensured, the problems caused by looseness are reduced, and the normal use effect of the water meter pipeline is ensured.

A three-point positioning installation hardware hinge base is characterized by comprising a base body, a first connecting base and a second connecting base are arranged on the left side and the right side of the base body respectively, a third connecting base is arranged at the tail of the base body, and the first connecting base, the second connecting base and the third connecting base are distributed in a delta shape. Mounting holes are formed in the first connecting seat, the second connecting seat and the third connecting seat, and fixing screws penetrate through the mounting holes to be fixedly connected with the plate. The hinge has the advantages that the third connecting point is introduced to form a stable structure shaped like the Chinese character'pin ', force generated in the opening and closing process of the hinge can be effectively dispersed and balanced in the three-point positioning mode, and therefore the stability of the connecting position of the hinge and a plate is remarkably improved. The stability is enhanced, the loosening problem caused by uneven stress in long-term use is reduced, and the service life of the product is prolonged.

The anti-loosening hanging bracket comprises a fixing plate, a U-shaped support is arranged below the fixing plate, a plurality of rectangular branch pipes are fixedly connected to the bottom of the U-shaped support, threading sleeves are fixedly connected to the bottom ends of the rectangular branch pipes, and rectangular sliding holes communicated with the interiors of the corresponding rectangular branch pipes are formed in the inner walls of the tops of the threading sleeves. Vertical missile buffer assemblies are fixedly connected to the two sides of the bottom of the fixing plate, the two vertical missile buffer assemblies are sleeved with a U-shaped support, and the same elastic tightening pressing and fixing assembly is slidably arranged in a rectangular branch pipe and a corresponding rectangular sliding hole in a sleeved mode. According to the utility model, a series of structures are arranged, so that a plurality of cables can be synchronously, rapidly, stably, elastically, tightened and fixed to prevent loosening, one-by-one fixation is not needed, the fixing efficiency and stability are improved, stable tightening and fixed pressing can be ensured when the cables vibrate, and vertical elastic buffering force unloading can be carried out on the cables at the same time; and the safety of hanging and supporting a plurality of cables is improved.

The plastic-coated steel pipe socket connection structure comprises a first plastic-coated steel pipe, a second plastic-coated steel pipe and an adapting pipe, guide plates are annularly arranged on the inner wall of the adapting pipe at equal intervals, the guide plates are of a U-shaped structure design, openings of the guide plates face downwards, and forward sawtooth plates are fixedly arranged at the top ends of the inner walls of the guide plates. A fixed ring is detachably installed on the outer wall of the second plastic-coated steel pipe, a movable ring is arranged on the outer wall of the fixed ring, and inserting plates are annularly arranged on the inner wall of the fixed ring at equal intervals. Through mutual cooperation of a guide plate, a forward sawtooth plate, a fixed ring, a movable ring, a first adapter shaft, a second assistance rod, an inclined panel, a limiting plate, a second adapter shaft, an insertion plate, a reverse sawtooth block and a torsion spring, on one hand, a worker can conveniently and rapidly connect and fix a first plastic-coated steel pipe and a second plastic-coated steel pipe; and on the other hand, workers can conveniently and rapidly disassemble the first plastic-coated steel pipe and the second plastic-coated steel pipe, and later inspection and maintenance work can be conveniently carried out by the workers.

The invention discloses a gear bonding strength and dry running capability test bench. The test bench comprises a base station; the driving device and the loading device are mounted at one end of the base station; the gear box is installed at the other end of the base station, a step-up gear box and a test gear box are arranged in the gear box, and the step-up gear box is in transmission connection with the test gear box; the driving device and the loading device are in transmission connection with the step-up gear box through a coupling, and a torque detection piece is mounted on the coupling; the performance monitoring assembly is arranged on the test gear box and used for monitoring the states of the test gear under different lubricating oil amounts, pressures, temperatures and rotating speeds; and the protection assembly is installed on one side of the test gearbox. Through the arrangement of the step-up gear box and the test gear box, the operation of an aero-engine speed reducer in an oil-lacking or oil-free lubrication state at a high rotating speed and high power can be simulated, and the gear bonding strength and the dry operation capability in the speed reducer are improved by utilizing a test result.

The invention discloses a connecting piece of a communication iron tower, and belongs to the field of connecting pieces, the connecting piece comprises a tower body, a maintenance platform is installed on the tower body, a plurality of annularly distributed mounting racks are installed on the maintenance platform, each mounting rack is connected with a communication antenna through a plurality of connecting piece main bodies, each connecting piece main body comprises an upper connecting plate, and a lower connecting plate is installed on the upper connecting plate. A rotating shell is fixedly installed on the lower surface of one end of the upper connecting plate, by arranging a locking piece and a matching sleeve piece, when a second rotating piece is driven to rotate, the second rotating piece can descend along a sliding sleeve at the same time, and then the second rotating piece can push the locking piece; when the locking piece is pushed, the locking piece can be matched with the matching sleeve piece to clamp the surface of the mounting frame so as to achieve fastening, when the communication antenna is blown by wind to swing back and forth, self-locking can be achieved, the faster the airflow changes, the larger the wind power is, connection can be firmer, the loosening probability is reduced, the overhaul frequency is reduced, and the workload of workers is reduced. The use is convenient.

The utility model discloses a novel axial flow fan which comprises a mounting sleeve, a driver, fan blades and a mounting structure. The mounting structure is arranged, the fixing frame is in the herringbone shape, higher stability is achieved, shaking is reduced, the fixing frame can be attached to the inner side surface of the limiting base after being mounted in the limiting base, the fixing frame is positioned and clamped through the limiting base during vibration or shaking, the mounting stability is improved, bolt looseness is greatly reduced, and the service life of the fixing frame is prolonged. The pressing frame is pressed on the limiting seat, then the pressing block is pressed at the bolt installation position of the fixing frame, then the butt joint nut is connected with the butt joint screw rod, the pressing frame is limited and fixed, the bolt installation position of the fixing frame is pressed and fastened through the pressing block, the stability of connection between the fixing frame and the installation sleeve is improved, and the fixing frame is prevented from being damaged. And the phenomenon of loosening is not easy to occur.

The utility model relates to the technical field of roads and bridges, in particular to a road and bridge panel joint reinforcing device which comprises a first panel, and a second panel is arranged on one side of the first panel. One side of the first panel and the interior of the second panel are jointly provided with a connecting assembly; the bottom ends of the first panel and the second panel are jointly provided with a reinforcing assembly. Through cooperative use of the square columns, the connecting blocks, the special-shaped blocks, the round rods and the circular truncated cones, the purpose of prolonging the service life of the panels can be achieved, dependence of a single bolt is reduced, a more stable and compact structure can be provided, and therefore the overall bearing capacity and stability are enhanced, displacement and looseness between the panels are reduced, and the service life of the panels is prolonged. The maintenance and repair requirements are reduced, the maintenance cost is reduced, the maintenance period is shortened, and the aging and abrasion of the pavement are effectively slowed down.

The utility model provides an encoder mounting structure and a wind generating set. And the encoder mounting structure is used for connecting the rotary encoder and the variable-pitch motor. The encoder mounting structure comprises an outer fixing sleeve and an inner fixing sleeve, the outer fixing sleeve is sleeved on the periphery of the inner fixing sleeve, and the inner fixing sleeve is sleeved on the periphery of the rotating shaft. A counter bore is formed in a rotating shaft of the rotary encoder in the axial direction, a rotating shaft of the variable-pitch motor is embedded in the counter bore, and the rotating shaft is fixedly connected with the counter bore. The variable pitch motor is provided with a brake, two ends of the outer fixing sleeve are respectively connected to the brake and the rotary encoder, a brake end face of the brake is provided with a positioning groove, one end, facing the brake end face, of the outer fixing sleeve is provided with a positioning bulge, and the positioning bulge is clamped in the positioning groove. According to the encoder mounting structure, the rotary encoder is connected with the variable pitch motor, and the joint of the main shaft and the rotary shaft has high connection stability in the axial direction and the radial direction of the main shaft.

The invention discloses an oral cavity fixator capable of absorbing liquid in multiple directions, and relates to the technical field of medical equipment. By adjusting the distance between the toothed plates, the fixator can effectively adapt to the sizes of oral cavities of different patients, the use convenience is improved, the comfort of the patients in the use process is enhanced, liquid in the oral cavities of the patients can be sucked through the two sets of liquid absorption cotton, liquid such as saliva in the oral cavities can be effectively absorbed, and the use effect is good. Liquid is prevented from flowing to the face of a patient, the discomfort of the patient is reduced, the liquid is sucked from the liquid suction cotton through the liquid suction heads, the situation that the liquid overflows from the liquid suction cotton due to the fact that too much liquid is sucked by the liquid suction cotton is avoided, respiratory tract blockage or infection caused by liquid accumulation can be prevented, meanwhile, liquid suction can be conducted in multiple directions through the multiple sets of liquid suction heads, and the use effect is good. Furthermore, the extraction efficiency is improved, and secretions in the oral cavity of the patient can be better controlled and managed by intensively extracting the liquid.

The invention relates to the technical field of geological exploration, and discloses a metal mine prospecting exploration device and method for a field porphyry mine district, and the metal mine prospecting exploration device for the field porphyry mine district comprises a drilling machine, a drilling mechanism arranged at the front part of the drilling machine, and a connecting mechanism arranged in the drilling mechanism, the drilling mechanism comprises a connecting cylinder arranged at the bottom of the drilling machine, a first drill rod arranged at the bottom of the connecting cylinder, a drill bit arranged at the bottom of the first drill rod and an annular groove formed in the inner wall of the first drill rod. By arranging the drilling mechanism, the drilling machine can automatically adjust the flushing water amount during operation so as to adapt to different drilling target hardness, quick connection of the coring device and the drilling rod can be achieved, the assembling process of the coring device and the drilling rod is simplified, meanwhile, sufficient supporting force can be provided, and the situation that a rock core falls off due to insufficient force in the extraction process is prevented.

The present application relates to the technical field of motherboard structure, and discloses a motherboard and a server, including a board body and a first power module. Specifically, the board body is provided with a mounting portion for mounting a processor; the first power module is arranged in the mounting portion and overlaps with the mounting portion along a first direction, and the first power module is used to supply power to the processor, wherein the first direction is perpendicular to the board body. The motherboard and the server disclosed in the present application solve or improve the problem of a long power supply path between the processor and the power supply and low power supply efficiency.