34results about How to "Achieve tight fit" patented technology

The invention belongs to the fixture field used in processing procedures of electronic products, and in particular relates to a positioning fixture for assembling a flexible printing circuit (FPC). The fixture comprises a layer of bottom plate, a layer of FPC carrier plate arranged on the bottom plate, a product positioning pin and a carrier plate positioning pin, wherein the product positioning pin and the carrier plate positioning pin vertically penetrate through the FPC carrier plate and are inserted into the bottom plate. The fixture is characterized in that a thin steel sheet is also arranged between the bottom plate and the FPC carrier plate and provided with holes so that the product positioning pin and the carrier plate positioning pin can pass through, the product positioning pin and the carrier plate positioning pin are tightly clamped by the thin steel sheet through the holes so that shaking is not generated, and the thin steel sheet is also provided with a layer of bonnet lock pressing plate used for pressing the thin steel sheet tightly. The fixture can reduce the possibility of deviation caused in the assembling process, is convenient for assembling, improves the assembling precision of the FPC and provides the accurate positioning for subsequent processing procedures of the FPC.

The invention discloses a phase shifter dielectric plate, which is arranged between a phase shift circuit and a cavity and moves along a preset locus, wherein the dielectric plate is provided with a plurality of protrusions for pressing against the top wall or the bottom wall of the cavity, and the protrusions are higher than the plane of the dielectric plate. When the phase shifter dielectric plate is applied to a phase shifter, the dielectric plate is in tight fit with the cavity, and the problem of high signal index fluctuation in the moving process of the dielectric plate due to a large clearance between the dielectric plate and the cavity is solved; moreover, because the contact area between the protrusions and the cavity is small, high friction is not produced between the both, and abnormal transmission of the dielectric plate is avoided. In addition, the invention further discloses a phase shifter adopting the dielectric plate.

The invention discloses a novel orthodontics correction method. The novel orthodontics correction method comprises the steps of (1) obtaining the data of the oral cavity of a patient; (2) determining the parameter of an oral cavity three-dimensional model; (3) constructing a three-dimensional model of an invisible correction machine; (4) making the invisible correction machine; and (5) performing treatment. According to the orthodontics correction method, the problem that a conventional treatment scheme which is set is greatly different from actual desired results for invisible correction is solved, the correction machine device can be used for designing treatment re-set targets according to the specific situation of different patients from designing the treatment method to making the invisible correction machine, so as to realize tight cooperation of the design target with the wearing precision of the correction machine by a patient to be corrected, which is favorable for correction for the patient.

The invention relates to a barren liquor type direct-cooling energy storage battery pack, which comprises a box body, wherein a low-boiling-point refrigerant is injected into the box body; a battery pack soaked in the low-boiling-point refrigerant in the box body; and a condensation module arranged in the box body and positioned above the battery pack; wherein the battery pack comprises a plurality of first channel plates distributed at intervals and single batteries arranged among the first channel plates, a second channel plate is arranged at the bottom of the battery pack, first channels incontact with the surfaces of the single batteries are arranged in the first channel plates, and second channels in contact with the surfaces of the single batteries are arranged in the second channelplate; a condensation backflow channel is arranged in the condensation module, at least one connecting channel used for being communicated with the condensation backflow channel and the second channel is arranged between the battery pack and the box body, and the condensation backflow channel, the connecting channel, the second channel and the first channel are communicated to form a circulationloop. The refrigerants make direct contact with the battery, the battery is directly cooled through phase change heat absorption, the heat conduction speed is high, and the cooling efficiency is high.

The invention discloses an automobile part air reservoir convenient to mount. The automobile part air reservoir convenient to mount comprises a supporting base; a vertically arranged supporting box body is connected to the external wall of one side of the top of the supporting base through a bolt; a first groove is formed in the external wall of the other side of the top of the supporting base; horizontally arranged sliding rods are connected to the internal walls of the two ends of one sides of the first groove through bolts; and third supporting blocks are connected to the external walls ofthe other sides of the bottoms of the two sliding rods through bolts. According to the automobile part air reservoir convenient to mount, as the supporting box body is arranged, a first supporting block drives a second supporting plate to move to the right so as to drive two fixing clamping hooks to approach each other and be inserted into fixing clamping grooves when an air reservoir body is pushed; and then a supporting rod is rotated so that the supporting rod is clamped between two first supporting plates to effectively prevent the first supporting block from moving to the left; and therefore, the mounting stability of the air reservoir body is improved.

The invention relates to granular silicon dioxide electrolyte and a storage battery. The granular silicon dioxide electrolyte comprises the following raw materials by weight percent: 3.0 to 5.0 percent of SiO2, 1.2 to 1.8 percent of Na2SO4, 42 to 45 percent of H2SO4, 0.08 to 0.12 percent of SnSO4, 0.1 to 0.3 percent of fluorine-containing resin, 0.5 to 1.2 percent of methyl polyethylene glycol, 0.08 to 0.12 percent of carboxymethylcellulose and 46 to 53 percent of self-made pure water. Compared with the prior art, the electrolyte is formed by compounding SiO2 particles in different particle size ranges and a 1.35g / mL sulfuric acid aqueous solution, so that the thermal runaway phenomenon of the battery can be effectively prevented, and the capacity for absorbing foreign ions in the electrolyte is relatively good; current distribution on the surface of an electrode is uniform; by adopting a thin polar plate technology, the quantity of positive and negative polar plates is increased, the thickness of the negative polar plate on the outermost side is reduced, the utilization rate of battery active substances is increased, the tight assembling of the battery is realized, and the softening and dropping of positive polar plate active substances can be slowed down.

The invention relates to a small-tooth-difference high-precision cycloid gear speed reducer which comprises an input shaft, a speed reduction mechanism and an output shaft. The speed reduction mechanism comprises a tooth ring, cycloid tooth pieces, a holder and eccentric shafts. The cycloid tooth pieces are eccentrically arranged on the input shaft through a first eccentric assembly. The holder comprises two holding end covers and connecting columns. The connecting columns are connected with and located on the holding end covers. The eccentric shafts penetrate through tooth penetrating shaft holes. A second eccentric assembly is arranged between the eccentric shafts and the tooth penetrating shaft holes of the cycloid tooth pieces. The two holding end covers are provided with cover penetrating shaft holes respectively. A third eccentric assembly is arranged between the two ends of the eccentric shafts and the cover penetrating shaft holes of the holding end covers. The cycloid gear speed reducer is small in size, all speed reduction parts can achieve close fitting, the precision of the whole speed reducer is improved, and the high transmission ratio can be achieved.

The invention is applied to the technical field of connectors and provides a gap eliminating part. The gap eliminating part comprises a first gap bridging seam and a second gap bridging seam which aresequentially and alternatively arranged, wherein the first gap bridging seam and the second gap bridging seam respectively begin from the two ends of the gap eliminating part and are arranged in theaxial direction of the gap eliminating part, the first gap bridging seam and the second gap bridging seam do not penetrate through the gap eliminating part in the axial direction and penetrate througha lateral wall of the gap eliminating part in the radial direction, and in addition, the first gap bridging seam and the second gap bridging seam have lapped parts on the axial direction. The gap eliminating part disclosed by the invention can make hole shafts achieve close fit without the interference fit situation; furthermore, gaps caused by thermal expansion and cold contraction can be made up, and the hole shafts can keep a fastened state all the time.

The invention provides a washing machine. The washing machine comprises an inner barrel, a connecting disc, a sealing plate and a driving device. The connecting disc is arranged at the bottom of the inner barrel, the connecting disc is provided with drainage holes and a first matching face, and the drainage holes run through the first matching face. The sealing plate is opposite to the connecting disc, and a second matching face matched with the first matching face is arranged on the sealing plate. An output shaft of the driving device is connected with the sealing plate and is used for driving the sealing plate to rotate. The first matching face and the second matching face are obliquely arranged in the circumferential direction of the sealing plate, and thus when the sealing plate rotates, the second matching face can be attached to the first matching face to seal the drainage holes. According to the washing machine, the drainage holes are sealed through the tight fit of the first matching face on the connecting disc and the second matching face on the sealing plate, and the reliability of the washing machine is improved while normal washing and drainage functions are achieved.

The invention relates to a wall-climbing robot suitable for cleaning a fan tower. The wall-climbing robot structurally comprises a rack, a walking driving system, movable supporting arms and a magnetic chuck; the walking driving system comprises a motor speed reducer and a universal shaft; power output shafts are connected to the two output ends of the motor speed reducer respectively, each poweroutput shaft is connected with a commutator, and the output ends of the commutators are connected with wheel assemblies on the same side of the robot through the universal shaft, so that wheels on thesame side of the wall-climbing robot are driven by one motor speed reducer to operate synchronously; and the movable supporting arms comprise supporting arm assemblies and the wheel assemblies, harmonic speed reducers are installed in the wheel assemblies, and the universal shaft is connected with the harmonic speed reducers through fasteners. According to the wall-climbing robot, the movable supporting arms on the same side of the robot are driven and controlled by one motor speed reducer, a multi-stage speed reduction driving manner can be formed, the configuration number and dead weight ofthe motor speed reducers are reduced, and the loading capacity and working characteristics of the wall-climbing robot can be improved.

The invention discloses a honeycomb screw plate fixation assembly and a refrigerator. The honeycomb screw plate fixation assembly is used for clamping and fixing a pasting board of the refrigerator and comprises a honeycomb plate and fixation screws. The honeycomb plate is provided with a first surface and a second surface, wherein the first surface is provided with at least one assembling hole, and the aperture of the first assembling hole is gradually decreased towards the direction of the second surface of the honeycomb plate. The fixation screws comprise screw caps and screw rods, wherein the screw rods are in threaded fit with the first assembling holes. According to the invention, when the fixation screws are tapped into the honeycomb plate, the honeycomb plate is not deformed, the performance of fixation between the honeycomb plate and the fixation screws can be improved, and the assembling stability of the refrigerator is improved.

The invention discloses a metal injection molded finished product correcting and shaping device and a correcting and shaping process thereof, relates to the related field of metal injection molding, and aims to solve the problem that a molding product cannot be corrected and shaped in the prior art. One side of the upper end of a device bottom plate is provided with a mounting back plate; the mounting back plate is fixedly connected with the device bottom plate; the mounting back plate is provided with a mounting insertion hole; one side of the rear end of the mounting insertion hole is provided with arc clamping plates; each arc clamping plate is arranged to be in an arc section plate shape; and each arc clamping plate is provided with a third telescopic rod; the number of the third telescopic rods is equal to that of the arc clamping plates; each arc clamping plate is fixedly connected with the corresponding third telescopic rod; one side of the mounting back plate is provided with afirst electric sliding rail; the upper end of the first electric sliding rail is provided with a first electric sliding block; the first electric sliding block is electrically connected with the first electric sliding rail; and the upper end of the first electric sliding block is provided with a connecting plate.

The invention relates to a self-attaching type movable supporting arm of a wall-climbing robot. The structure of the self-attaching type movable supporting arm comprises a support arm assembly and a wheel assembly, one end of the support arm assembly is inserted into a transverse sleeve of the rack and connected with a transverse sleeve through a pin shaft; the supporting arm assembly is providedwith a supporting arm suction cup which is composed of strong magnets in an arrangement mode, the attraction face of the supporting arm suction cup faces the working face of the robot, and the transverse sleeve is provided with an adjusting bolt used for limiting and adjusting the maximum opening angle of the supporting arm assembly. According to the invention, the supporting arm assembly hinged in the transverse sleeve of the wall-climbing robot rack can be always attached to the surface of the fan tower drum in the operation process of the wall-climbing robot; the purpose of automatically adjusting the opening angle of the support arm assembly along with the thickness change of the fan tower drum is achieved; therefore, the arrangement of an opening angle adjusting mechanism of the movable support arm is omitted, the stable and good contact between the wheel surface of the robot wheel and the working surface of the fan tower can be realized, and the normal walking operation of the wall-climbing robot on the fan tower is ensured.

The invention provides an optical fiber connector and a tail wiring assembly thereof, and can solve the problems that an optical fiber is easily scratched and damaged with the inner wall of an existing optical fiber connector during assembly, and the reliability and the percent of pass are low due to the fact that optical signal transmission is affected by chippings generated by scratching. The tail wiring assembly comprises a main shell and an optical cable fixing piece; a fiber protection sliding sleeve is assembled with the optical cable fixing piece in an inserting and sleeving manner; thefiber protection sliding sleeve is provided with an extension position and a retraction position relative to the optical cable fixing piece; when in the extending position, the optical fiber fixing piece and the optical cable fixing piece jointly enclose a fiber protection space; when in the retraction position, the optical fiber can extend out of the front end of the optical fiber protection sliding sleeve; the fiber protection sliding sleeve and the optical cable fixing piece are in sliding resistance fit in the direction of a plug bush so as to keep relative fixation when no external forceis applied to the two; a stop structure is arranged in the inner cavity of the main shell and can be matched with the front end of the fiber protection sliding sleeve in an abutting mode to enable the fiber protection sliding sleeve to overcome the sliding resistance acting force with the optical cable fixing piece to retract; and the main shell is also provided with an opening for the optical fiber to extend out of the main shell.

The invention discloses a split plug-in type surface acoustic wave temperature sensor, which is characterized by comprising a surface acoustic wave temperature sensing chip, a ceramic antenna, a sensor shell, an arc-shaped upper bracket, a groove-shaped lower bracket and a heat-conducting gasket, the surface acoustic wave temperature sensing chip is fixedly connected to the side surface of the ceramic antenna; the ceramic antenna is arranged in the sensor shell; the internal space of the sensor shell is matched with the ceramic antenna; the ceramic antenna is fixed on the top surface of the arc-shaped upper support, the sensor shell, the arc-shaped upper support and the groove-shaped lower support are connected through screws, and the heat-conducting gasket is arranged at the bottom of the groove-shaped lower support. The ceramic antenna is used as a built-in antenna of the surface acoustic wave, the height of the antenna is greatly reduced, the sensor is only 10mm higher than the chrysanthemum head after being mounted, the mounting requirement of a moving contact is met, and an up-and-down double-clip type mounting method is adopted, so that the sensor is ensured to be in close contact with the chrysanthemum head at any time, keep equipotential and be not damaged by high voltage of the chrysanthemum head after being mounted. According to the invention, reliable temperature monitoring of the moving contact by the surface acoustic wave temperature sensor is realized.

The invention provides a 18650 lithium ion battery pack structure, which includes: lithium ion battery individuals, a bottom plate, a side plate, a pressure plate, a cover plate, an electrical connector fixing plate, an elastic plate, an electrical connector, a guide bar, and a grounding device, and is characterized in that the positive electrodes of all the lithium ion battery individuals have the same orientation so as to contribute to modular expansion; the lithium ion battery individuals are directly bonded in the sleeve-type bottom plate so as to achieve rapid heat transfer; sufficient gaps are arranged between the lithium ion battery individuals to release the stress generated during the cyclic process of the lithium ion battery individuals; the elastic plate is arranged between thelithium ion battery individuals and the pressure plate; by adjusting the amount of deformation of the elastic plate, the lithium ion battery individuals and the bottom plate can be tightly connected;the high-resistance grounding device can release the charges accumulated in the battery pack structure. The structure provided by the invention has high specific energy, good thermal conductivity, high structural strength, and good safety and reliability, and is suitable for the field of small satellites.

The invention relates to a wall-climbing robot supporting arm assembly which structurally comprises a supporting arm body and a connecting flange, and the supporting arm body comprises a groove-shapedsupporting arm beam and a sealing plate welded to a groove opening of the groove-shaped supporting arm beam; the connecting flange is a square-frame-shaped protruding edge used for being connected with the end of the supporting arm body in a matched mode and is arranged on one end face of the flange body. The square-frame-shaped protruding edge surrounds the periphery of a shaft hole, used for being connected with a driving shaft in a penetrating mode, of the flange body, and a set of adjacent corners of the square-frame-shaped protruding edge are opening angles so that the ends forming the groove-shaped supporting arm beam can enter the square-frame-shaped protruding edge through the opening angles. The end opening of the groove-shaped supporting arm beam can be nailed into the square-frame-shaped protruding edge through the opening angle so that the end opening of the groove-shaped supporting arm beam is in close fit with an inner opening of the square-frame-shaped protruding edge,and the connecting strength of the groove-shaped supporting arm beam and the square-frame-shaped protruding edge after welding and the overall firmness degree of the supporting arm assembly are improved.

The invention provides a dustproof structure of a relay, and the structure comprises a shell dustproof structure and a tail piece dustproof structure; the shell dustproof structure is arranged betweenan outer cover and a base, and the tail piece dustproof structure is arranged on a tail piece in the base; in the shell dustproof structure, the end face of the top of a base extends outwards to forma circle of boss structure along the side direction of the inner wall, an outer cover is buckled on the base, the two ends of the bottom of the outer cover are each provided with an inwards-concave structure matched with the two ends of the boss structure, and a sealing gasket is arranged between the outer cover and the base. The sealing gasket is annularly arranged on the periphery of the boss structure, the inner side of the sealing gasket is matched with the outer side of the boss structure of the base in shape, and the outer side of the sealing gasket is consistent with the outer side ofthe base in shape. By improving the structure and additionally arranging the sealing gasket between the base and the outer cover, the base and the outer cover can be matched with the boss of the baseand the concave structure of the outer cover in a staggered mode, and the dustproof performance of the relay and the contact reliability of a contact in the field use process are improved on the basisthat the interchangeability with an existing safe railway signal relay part is guaranteed.

The invention discloses a plug-in type wooden door, which comprises a base plate (1) with a door lock (7). The front and back sides of the base plate (1) are provided with inserts (2) distributed in arrays in a horizontal, flat and vertical manner. Nail holes (3) are provided on the front and back sides of the base plate (1), and the side of the insertion piece (2) facing the base plate (1) is provided with insert nails (4) that are closely matched with the nail holes (3); The nail hole (3) is a through hole; a rubber sleeve (5) is provided between the nail (4) and the nail hole (3); the insert (2) is square, and the nail is inserted on the insert to The distribution is in the form of a square; a circle of stepped grooves (6) is provided on the outer periphery of the insertion piece (2) facing the base plate. The invention has the advantage that only the damaged area needs to be repaired after being damaged, thus avoiding many troubles and large economic losses.