193results about How to "High concentricity" patented technology

The invention provides an adjustable automobile air conditioner knob detection mechanism, and the mechanism comprises a mounting plate frame, a torsion sensor is fixedly connected with the upper surface of a clamping drive assembly, the clamping drive assembly is connected with a clamping jaw assembly, and the clamping jaw assembly is connected with a clamping jaw. The clamping jaw assembly is used for clamping the automobile air conditioner knob, and the torsion sensor is used for detecting torsion during rotation; the clamping jaw assembly is provided with a deformable contact part, and the contact part is used for automatically deforming when making contact with the outer wall of the knob. Through the arrangement of the concentricity self-checking assembly, the concentricity can be detected while the torsion is detected, so that the problem that the detection error is too large due to poor concentricity can be effectively avoided, and through the arrangement of the clamping jaw assembly, the concentricity can be detected at the same time. Adjustment can be carried out so as to compensate deformation protrusions or recesses on the arc-shaped outer wall of the rotary knob when clamping is carried out.

An electrically-controlled brake voltage buildup module belongs to the technical field of automobile brake systems and comprises a motor assembly, a piston and a transmission component connected between the motor assembly and the piston, the motor assembly comprises a hollow rotor shaft, the piston and the transmission component are mounted in the hollow rotor shaft, and the piston and the transmission component are mounted in the hollow rotor shaft. The transmission assembly is connected with the hollow rotor shaft through a self-aligning structure, or the transmission assembly is connected with the hollow rotor shaft through the self-aligning structure and a bearing seat, and the transmission mechanism has the beneficial effects that the structure is simple and compact, the concentricity of the transmission mechanism can be improved, the occurrence rate of an eccentric wear phenomenon is reduced, and the service life of the transmission mechanism is prolonged. Product life can be effectively prolonged and noise can be effectively reduced.

The utility model provides a gear shifting structure and an electric drive axle, the gear shifting structure comprises a first transmission shaft and a second transmission shaft, the first transmission shaft is rotatably connected with a floating gear, the second transmission shaft is fixedly connected with a gear shifting gear, and the gear shifting gear is meshed with the floating gear. According to the gear shifting structure and the electric drive axle, the gaps are reserved between the corresponding keys and the key grooves between the synchronous sleeve and the floating gear, a certain redundant space is provided when the synchronous sleeve and the floating gear are in key connection, and it is ensured that the keys on the synchronous sleeve and the floating gear rapidly enter the corresponding key grooves; furthermore, a tooth-missing positioning structure is arranged between the synchronous sleeve and the floating gear, the concentricity among the floating gear, the synchronous sleeve and the first transmission shaft is improved through abutting of the tooth-missing positioning structure and an opposite key, and the situation that direct connection is achieved in a flat key and spline mode, large friction is generated between keys due to errors, and the service life of the floating gear is prolonged is avoided. And the service life of the gear shifting structure is influenced.

The utility model relates to a rotor structure for an air suspension centrifugal blower, and belongs to the technical field of rotor structures. The motor rotor comprises a permanent magnet core body, sheaths, pull rods, plugs, thrust discs and shaft heads, the plugs are arranged at the two ends of the permanent magnet core body, the sheaths sleeve the permanent magnet core body and the sheaths, protrusions are arranged at the outer ends of the plugs, and one ends of the two pull rods penetrate through the protrusions of the plugs and are in threaded connection with the plugs; the other end of one pull rod sequentially penetrates through the main impeller, the thrust disc and the shaft head from outside to inside, and the other end of the other pull rod sequentially penetrates through the cooling impeller and the shaft head from outside to inside; the shaft head is arranged outside the protrusion of the plug in a sleeved mode, and a drainage impeller is further arranged between the shaft head close to the main impeller and the plug. By arranging the drainage impeller, airflow is effectively guided, the path of the air channel is optimized, the speed and the flow of the airflow in the heat dissipation air channel are increased, and the overall heat dissipation efficiency of the air blower is enhanced.

The utility model belongs to the technical field of tail brackets, and particularly relates to a fine-adjustable tail bracket. Which comprises a tailstock body, a base is arranged on the lower portion of the tailstock body, a tailstock is arranged at one end of the base, a tailstock sleeve is arranged on the tailstock, the base comprises an upper base body and a lower base body which are arranged in a spaced mode, the end, provided with the tailstock, of the upper base body and the end, provided with the tailstock, of the lower base body are connected into a whole, and a gap is formed between the upper base body and the lower base body. A through hole penetrating through the upper seat body is formed in the upper seat body, a fine adjustment device is arranged in the through hole, the lower end of the fine adjustment device abuts against the upper plane of the lower seat body, and the center position of a tailstock sleeve on the tailstock is finely adjusted; deformation is generated between the upper seat body and the lower seat body through the fine adjustment device, the center of the tailstock sleeve arranged on the tailstock is finally driven to be finely adjusted, the purpose of finely adjusting the concentricity of the headstock main shaft and the tailstock sleeve is achieved, adjustment is rapid and convenient, and the fine adjustment device can be suitable for machining of various products.

The utility model discloses a magnetic suspension bearing assembly free of secondary processing and a magnetic suspension motor. The magnetic suspension bearing assembly comprises a shell, a magnetic suspension bearing and a leading-out wire, a mounting groove is formed in the top of the shell in the axial direction of the shell. The magnetic suspension bearing is at least partially arranged in the mounting groove; a groove is formed in the bottom of the magnetic suspension bearing, a wire outlet hole is formed in the bottom of the shell, and the groove and the wire outlet hole are arranged side by side in the axial direction of the shell. The leading-out wire can penetrate through the wire outlet hole and the groove from the outside of the shell and is connected with the magnetic suspension bearing. The magnetic suspension motor comprises a motor barrel, a motor stator and a motor rotor. The motor stator is arranged around the inner wall of the motor barrel; the motor rotor is rotationally arranged in the motor barrel in the axial direction of the motor barrel; the magnetic suspension bearing assemblies free of secondary machining are arranged on the two sides of the motor barrel. Through the arrangement, the machining precision of the magnetic suspension bearing assembly is higher. The magnetic suspension motor reduces processing procedures and is higher in assembly efficiency.

The utility model discloses a polishing seat and a polishing device, the polishing seat is used for bearing a to-be-polished workpiece, the workpiece comprises an inner surface and an outer surface, the polishing seat comprises a supporting mechanism used for bearing the workpiece, and the supporting mechanism is provided with a spherical surface. The polishing base further comprises an adsorption part and a driving part, and the adsorption part is arranged on the supporting mechanism and used for adsorbing and fixing the workpiece of the supporting mechanism. The driving part is connected with the supporting mechanism and used for driving the supporting mechanism to rotate around a preset axis, and the preset axis passes through the sphere center of the spherical surface of the supporting mechanism. According to the polishing base, due to the fact that the driving piece can drive the supporting mechanism to rotate around the preset axis, and the preset axis passes through the sphere center of the spherical surface of the supporting mechanism, when the workpiece is polished, the supporting mechanism can drive the workpiece to rotate, the workpiece can be evenly polished, and the concentricity of the spherical surface of the workpiece can be improved.

The invention relates to an insulator structure assembling system and method, and is applied to the field of insulator assembling, the insulator structure assembling system comprises a plurality of assembling stations arranged on a rack, and the plurality of assembling stations are respectively provided with a fixing device for fixing a steel cap; the rack is provided with a driving device used for driving the fixing devices to move circularly along the outer edge of the rack, and the rack is further provided with a plurality of vibration devices used for making the fixing devices vibrate respectively. The rack is provided with a first pressing device used for making the insulator body abut against the interior of the steel cap and a second pressing device used for making the steel foot abut against the interior of the insulator body. The automatic assembling device has the technical effects that automatic assembling of a single insulator structure is achieved, the abutting degree and concentricity among an insulator body, a steel cap and a steel foot are improved, the labor cost is reduced, time and labor are saved, multiple insulator structures can be assembled at the same time, and the production quality and production efficiency of the insulator structures are improved.

The present invention provides a brake spring positioning structure of a parking brake air chamber, comprising a middle air chamber assembly, a membrane, an upper shell, a spring seat, a brake spring and a positioning sleeve, wherein the membrane is crimped between the upper shell and the middle air chamber assembly and forms a parking cavity with the middle air chamber assembly, and is characterized in that the spring seat, the brake spring and the positioning sleeve are concentrically assembled in the cavity formed by the membrane and the upper shell, the inner center of the upper shell has an inwardly recessed annular cone, the sleeve body of the positioning sleeve matches the annular cone, and the positioning sleeve has a first positioning portion, a second positioning portion and a third positioning portion, and the inner hole of the lower port of the brake spring is positioned and matched through the first positioning portion, the second positioning portion and the third positioning portion, the base portion of the spring seat is disc-shaped and abuts against the membrane, and the main body portion thereof has a plurality of evenly distributed variable diameter structures, and the inner hole of the upper port of the brake spring is positioned and matched through the variable diameter structures.

The utility model provides a water distribution device of a multifunctional submersible pump, and belongs to the technical field of mechanical equipment. The technical problem that the use scene of a water distribution device of an existing multifunctional submersible pump is limited is solved. The water distribution device of the multifunctional submersible pump comprises a permanent magnet synchronous motor and a pump assembly, the permanent magnet synchronous motor comprises a motor shell and a motor shaft, the pump assembly comprises a volute and an impeller arranged in the volute, a water inlet connecting piece is fixedly connected between the volute and the motor shell, and the upper end of the motor shaft penetrates through the water inlet connecting piece to be fixed to the impeller. A water outlet section is fixedly welded to the upper portion of the volute and provided with a vertically-through water passing channel, and the upper portion of the water outlet section is detachably and fixedly connected with a water distribution device capable of adjusting the oxygenation area. The oxygen increasing device can be used in more scenes to meet individual requirements, and the oxygen increasing effect is further improved.

A flexible gear connecting flange structure of a harmonic reducer comprises a flexible gear, an output flange and a connecting flange, a center hole is formed in the bottom of the flexible gear, a shaft step is arranged in the center of the connecting flange, and the length of the shaft step is larger than the thickness of the center hole in the bottom of the flexible gear. The outer ring of the shaft step penetrates through the bottom center hole of the flexible gear, enters the center through hole of the output flange and is tightly attached to the inner wall of the output flange. According to the flexible gear connecting flange structure of the harmonic reducer, the shaft step of the connecting flange is long, the shaft step outer ring of the connecting flange can penetrate through the bottom of the flexible gear to enter the center through hole of the output flange and be tightly attached to the inner wall of the center through hole, and therefore the flexible gear connecting flange structure of the harmonic reducer can rapidly achieve concentricity of the flexible gear and the connecting flange, and the service life of the flexible gear is prolonged. The flexible gear and the output flange are convenient to assemble, the assembling difficulty is reduced, the concentricity of the flexible gear and the output flange is greatly improved, and therefore the service life of the flexible gear and the output flange is prolonged.

The invention relates to the technical field of painting equipment, and discloses a high-speed vertical machine full-automatic painting device which comprises a painting box, a drying box is fixedly installed on the upper surface of the painting box, a cooling box is fixedly installed at the top of the drying box, a paint box is fixedly connected to the inner side wall of the painting box, and a paint outlet is formed in the inner side wall of the paint box. One side of the paint box is provided with an inclined surface, the inclined surface of the paint box is provided with a row of paint discharging grooves, one side wall of the interior of the painting box is fixedly connected with a connecting plate, the surface of the connecting plate is provided with a row of empty grooves, each empty groove is internally provided with a painting mold, and the painting molds are matched with the paint discharging grooves; according to the device, through the arrangement of the painting mold, the reed assembly and the cooling box, the concentricity of an enameled wire can be better, painting is more uniform, paint nodule missing on the surface of a wire harness is avoided, and meanwhile the wire harness can be rapidly cooled.

The present invention relates to the technical field of vacuum electronic devices, and provides an electron gun frame, comprising an insulating porcelain seat, a first anode seat and a second anode seat arranged on the insulating porcelain seat, and a positioning member for fixing the first anode seat and the second anode seat, wherein the insulating porcelain seat comprises an insulating porcelain ring, and at least two positioning block groups evenly distributed along the circumference of the top surface of the insulating porcelain ring, each positioning block group comprises a first positioning block, a second positioning block and a third positioning block, the first positioning block, the second positioning block and the third positioning block are arranged in sequence and equidistantly, the setting heights of the first positioning block, the second positioning block and the third positioning block are successively larger, and each of the first positioning block, the second positioning block and the third positioning block is fixedly connected to the first anode seat, the second anode seat and the positioning member respectively by a clamping method. The present invention solves the technical problem that the miniaturized traveling wave tube in the prior art cannot meet the requirements in terms of weight reduction, processing, assembly and precision.

The invention discloses a supporting-adjustable guiding catheter which comprises an inner tube and an outer tube movably arranged outside the inner tube in a sleeving mode and further comprises a self-adaptive externally-supported woven mesh tube, the self-adaptive externally-supported woven mesh tube comprises a fixed end and a movable end, and the outer tube comprises a driving end close to one end of the self-adaptive externally-supported woven mesh tube. The movable end is fixedly connected with the driving end through a corresponding metal ring; the fixed end is fixedly connected with the front end of the inner pipe through a corresponding metal ring; the outer pipe can slide relative to the inner pipe to drive the driving end to drive the moving end to be close to or far away from the fixed end, so that the self-adaptive externally-supported woven mesh pipe is switched between an externally-supported state and a straightened state. The self-adaptive externally-supported woven mesh tube is adjustable in externally-supported expanding diameter and supporting performance, is suitable for positioning blood vessels with different diameters, is convenient to operate, reduces the difficulty and risk of surgical operation, is high in centrality after penetrating into the blood vessels, improves the developing performance, and is beneficial for a doctor to accurately judge the placement position of the guiding catheter.

The utility model relates to the technical field of clamps, in particular to a clamp tool for surface treatment of a lower connecting plate, which is characterized in that a mounting frame is mounted on a workbench through a mounting hole, a connecting rod is connected with a clamping ring, the clamping ring is mounted on the workbench, a workpiece is placed on the clamping ring, and the lower connecting plate is mounted on the lower connecting plate through the clamping ring. By rotating the clamping bolt, the clamping bolt is matched with the threaded hole, so that the clamping ring is shrunk, the machined part is clamped and fixed while the clamping ring is shrunk, then the machined part is stable, and the problems that an existing tool clamp for the semicircular part is poor in concentricity during machining, and the machining efficiency is high are solved. And the problems of poor precision and instability are solved, and the production efficiency is improved.

A motor iron core stator and rotor large rotation die comprises a fixedly-arranged supporting sleeve and a rotation sleeve rotationally connected to the supporting sleeve with the vertical direction as the axis, a die is arranged on the rotation sleeve, the motor iron core stator and rotor large rotation die further comprises a rotation gear, a transmission assembly and a rotation motor, and the rotation gear and the rotation sleeve are mutually connected and coaxial. The transmission assembly comprises a transmission gear, a synchronous belt wheel and a transmission belt, the transmission gear and the synchronous belt wheel are connected with each other and are coaxial with each other, the rotation gear is meshed with the transmission gear, the transmission belt is connected to the synchronous belt wheel in a winding mode, and the output end of the rotation motor acts on the transmission belt. According to the scheme, the problem of single-side abrasion between the rotary sleeve and the supporting sleeve due to the tension effect of the transmission belt is effectively solved, the eccentric degree of a mold on the rotary sleeve is weakened, and various problems caused by mold eccentricity are further solved.

The application provides a cable core coating forming device for cable processing and relates to the technical field of cable core coating. The device comprises a main body, size adjusting assemblies are symmetrically arranged in the mold, a resisting plate is fixed at one end of the size adjusting assembly, a plurality of delivery wheels are symmetrically arranged in the mold, an arc adjusting assembly is arranged in the delivery wheel, a cleaning assembly is arranged in the fixing seat, and a plurality of cleaning wires are fixed at equal angles on one side of the cleaning assembly. The meshing transmission of the bevel gear and the bevel gear ring can realize the synchronous rotation of the two-side lead screws, and then drive the synchronous displacement of the moving column, the fixing frame, the delivery wheel and the resisting plate, so that the reliable straightening of the cable core can be realized, the central clamping of the cable core can be realized, the cable core can always move linearly along the center of the mold, and the technical defects of the eccentric coating layer, the uneven thickness and the like caused by the bending, the deflection and the shaking of the wire core are solved.

The utility model discloses a novel encoder, which comprises an encoder moving disc and an encoder static disc provided with a PCB (printed circuit board), the encoder static disc is provided with a reading head electrically connected with the PCB, the encoder static disc is provided with a central through hole A, and the aperture of the central through hole A is larger than the diameter of a motor shaft. The encoder static disc is installed at the tail end of the motor shell in the using state, the encoder movable disc is installed at the tail end of the motor shaft in the using state, a gap is reserved between the encoder static disc and the encoder movable disc, and the reading head is used for detecting rotation information of the encoder movable disc. According to the utility model, the encoder static disc is directly installed at the tail part of the motor shell, no extra support for installing the encoder static disc is needed, and the encoder static disc is located between the encoder dynamic disc and the motor, thereby reducing the occupied space of the encoder, reducing the length of the motor on the whole, reducing the occupied space when the servo motor is used, and improving the service life of the servo motor. And meanwhile, an encoder static disc bracket is not arranged, so that the cost of the encoder is reduced.

The present invention relates to the technical field of grinding equipment, and specifically discloses a bearing outer cylindrical grinding device, wherein a rotating seat is coaxially rotatably connected to a support rod frame, and a grinding mechanism is installed on the rotating seat; a ring seat is slidably sleeved on the support rod frame along the front-back direction, a central push piece is located directly below the bearing and is vertically slidably connected to the frame, and a first connecting rod is hinged between the central push piece and the ring seat; two sets are rotatably sleeved on the ring seat, and two side push pieces are respectively hinged to the two sets through a second connecting rod, the second connecting rod is equal in length to the first connecting rod, and the side push piece is connected to a sliding seat through an elastic sleeve rod, and the sliding seat is elastically slidably connected to the frame along the left-right direction. The bearing outer cylindrical grinding device of the present invention determines the concentricity of the support rod frame and the bearing outer cylindrical surface through the contact positioning of the central push piece and the side push piece on the bearing outer cylindrical surface, thereby realizing the correction grinding of the grinding mechanism and making the inner and outer circles of the bearing concentric.

The utility model relates to the technical field of tile chamfering machine assemblies, and discloses a novel tile chamfering machine chuck which comprises a chuck mechanism, a chuck mechanism is installed at the bottom of the chuck mechanism in a combined mode, the chuck mechanism comprises an aluminum alloy chuck, an embedding groove is formed in the bottom wall of the aluminum alloy chuck, and a right-hand thread groove is formed in the center of the inner top wall of the embedding groove. The clamping head mechanism comprises a plastic clamping head, and a right-hand screw thread head is arranged in the center of the top of the plastic clamping head. The whole tile chamfering machine chuck comprises the aluminum chuck and the plastic chuck which are in screwed connection, the chuck and the chuck are connected through the screw threads and are of a right-hand thread connection structure, the right-hand threads are consistent with the rotation direction, the chuck is tighter when being used, looseness cannot occur in the using process, and the concentricity of the screwed connection mode is good.

A kind of concentric positioning device of crystal bar rounding clamp, including crystal bar positioning device, rounding clamp positioning device;Crystal bar positioning device includes first inclined rod, second inclined rod, third inclined rod and fourth inclined rod;Rounding clamp positioning device includes two height adjusting devices, height adjusting device includes fixed end and lifting end, fixed end is provided with positioning hole.The present application first utilizes crystal bar positioning device, rounding clamp positioning device to carry out positioning, so that the axis of crystal bar and the axis of rounding clamp are located in the same vertical plane, then utilizes height adjusting device to adjust the height of rounding clamp, so that the axis of rounding clamp and the axis of crystal bar are located in the same horizontal plane, to realize rounding clamp and crystal bar concentric bonding, simple operation, improve the concentricity of rounding clamp and crystal bar, reduce the uneven impact of grinding wheel to crystal bar, solve the swing problem of crystal bar in the process of rolling outside circle, reduce the grinding allowance of crystal bar, improve grinding efficiency.

The utility model relates to sewing machine motor technical field, concretely, the utility model relates to a sleeve shaft direct drive motor with winder, including the shell, be equipped with the stator in the shell, be equipped with the rotor in the stator, the hollow rotating shaft is connected to the rotor, the hollow rotating shaft one end is connected with the rotating shaft of sewing machine body, the hollow rotating shaft other end is connected with the fixed needle inner core and hand wheel, be equipped with the hall board with being connected to the stator, be equipped with control element on the hall board, be equipped with magnet on the fixed needle inner core, the magnet is located control element one side, be connected with the winder on the shell, the winder includes the rotating wheel, the rotating wheel is in the winder work with hand wheel and the resistance is tight, this integral motor whole simple and stable structure, easy and fast installation, bearingless design, low cost, solved the problem that sewing machine modification direct drive motor does not have the winder, make it have the winding function and fixed needle function, effectively improved the efficiency of worker sewing.

The bearing bush machining tool comprises a base, a circular truncated cone is fixedly arranged at the upper end of the base, a cylindrical groove is formed in the center of the upper end of the circular truncated cone, a plurality of sliding grooves are formed in the upper end of the circular truncated cone and located on the peripheral side of the cylindrical groove, and the angles between every two adjacent sliding grooves are equal. A transmission rod is arranged in the sliding groove, a spiral groove is formed in the outer surface of the transmission rod, and two sets of sliding tables are arranged in the sliding groove. The utility model relates to the technical field of bearing bush machining. According to the bearing bush machining tool, a guide ball is controlled to be inserted into a spiral groove or retreat from the spiral groove through an electric telescopic rod, the purpose of controlling whether a sliding table is affected by rotation of a transmission rod or not is achieved, the moving flexibility degree of the sliding table is effectively improved, the tool can clamp bearing bushes with different radians, and the machining efficiency is improved. And the practicability of the device is effectively improved.

This invention belongs to the field of fire extinguishing materials and their preparation technology, and provides a fire extinguishing microcapsule and its microfluidic controllable preparation method. The preparation method is characterized by the following steps: (1) preparing fluids of each phase, (2) preparing a dual emulsion using a microfluidic device, (3) collecting and sealing the dual emulsion in a collection container, controlling the axis of the collection container to be horizontal, and controlling the collection container to rotate around its axis for 1 to 15 minutes, applying light to solidify the outer shell of the dual emulsion droplets while maintaining the rotation of the collection container, cleaning, and drying to obtain the final product. The fire extinguishing microcapsule prepared by this method consists of an outer shell and a liquid fluorine-containing fire extinguishing agent encapsulated within the outer shell. The outer shell of the fire extinguishing microcapsule has a uniform thickness, and the eccentricity between the outer shell and the core is less than 0.1. The method of this invention can achieve precise customization of fire extinguishing microcapsules according to the differentiated fire characteristics of different application scenarios, and can improve the concentricity between the core and the outer shell of existing fire extinguishing microcapsules.

The utility model discloses a kind of automobile steering gear box shock-absorbing sleeve press-fit mechanism, including vertical cylinder, cylinder control switch, steering gear box positioning device, shock-absorbing sleeve positioning shaft, steering gear box positioning device includes bottom plate, and two box body positioning supports, box body positioning hole supporting cylinder, box body positioning shaft are installed on bottom plate with left and right interval, shock-absorbing sleeve positioning shaft and box body positioning shaft are coaxially fixed together upside down, and are installed in box body positioning hole supporting cylinder by spring floating;The left and right ends of steering gear box are supported on two box body positioning supports, the lower end surface of box body positioning hole is supported on box body positioning hole supporting cylinder, at this time, box body positioning hole can be just sleeved on box body positioning shaft, shock-absorbing sleeve can be just sleeved on shock-absorbing sleeve positioning shaft, vertical cylinder is located just above shock-absorbing sleeve positioning shaft, ensure the coaxiality of shock-absorbing sleeve press-fit with box body positioning hole.The utility model solves the problem that box body positioning hole and shock-absorbing sleeve hole coaxiality error is too large and the efficiency is low in press-fit process.

The invention provides a top cover assembly, a battery and an energy storage device. The top cover assembly is used for packaging the battery. The top cover assembly comprises a cover plate, a pole and a current collecting piece, wherein the cover plate comprises a first surface and a second surface which are oppositely arranged along a first direction; the pole penetrates through the first surface and the second surface; the current collecting piece is arranged on one side of the second surface of the cover plate; wherein the current collecting piece comprises a first connecting part, a bending part and a second connecting part which are connected in sequence, the first connecting part is electrically connected with the pole, and the second connecting part is bent relative to the first connecting part; a first limiting part is arranged on the second surface, a second limiting part is arranged on the second connecting part, and the first limiting part is matched with the second limiting part. According to the top cover assembly and the battery provided by the invention, the accumulated error after the current collecting piece is folded can be reduced, and the folding precision of the current collecting piece is improved.

The invention provides a processing and preparing method of a novel nickel-titanium alloy nasolacrimal duct stent, and relates to the technical field of medical instruments. The method comprises the following steps: S1, obtaining a nickel-titanium alloy bar, and straightening the nickel-titanium alloy bar; s2, the straight rod is subjected to mechanical drilling machining; s3, the inner surface and the outer surface of the rough pipe blank are polished; s4, cold rolling deformation is conducted on the rough pipe blank through a hard core rod; s5, carrying out hot drawing deformation on the pipe blank by adopting a hard core rod; s6, a soft core rod is adopted for conducting room-temperature drawing deformation on the pipe blank; s7, carrying out multi-process coupling heat treatment on the pipe; s8, centerless grinding and electrochemical polishing are conducted on the pipe; and S9, the pipe is subjected to laser cutting and vacuum heat treatment. According to the invention, excellent surface roughness can be provided for the pipe, the density of the pipe can be effectively improved, the concentricity of the pipe can be improved, the inner surface roughness of the pipe can be effectively improved, the quality of the pipe can be improved, and the hyperelasticity is obviously improved.

A mechanical angular self-positioning magnetic suspension bearing comprises a static ring (3), a moving ring (4) and a bearing seat for accommodating the static ring (3) and the moving ring (4), the moving ring (4) is nested in the static ring (3), both the static ring (3) and the moving ring (4) are magnetic steel, opposite working surfaces of the static ring (3) and the moving ring (4) are inclined surfaces, and the opposite working surfaces have the same magnetic polarity; the moving ring (4) is accommodated and fixed in the moving ring sheath (5); the moving ring sheath (5) is fixedly connected with the rotating shaft (1); the static ring (3) is contained and fixed in the static ring sheath (2), and the bearing seat is fixedly connected with an equipment shell (such as a motor shell and a water pump seat). The concentricity of the magnetic suspension bearing and the rotating shaft is improved, the self-positioning of axial self-balance and radial self-balance of the magnetic suspension bearing on the suspension support of the rotating shaft and the rotor is realized, the moving ring can be in a complete suspension state relative to the static ring, and the bearing capacity and the suspension rigidity of the magnetic suspension bearing are enhanced, so that the service life is obviously prolonged.

The utility model relates to the technical field of cable sheath processing, in particular to a cable extrusion integrated die, which comprises a die core and a die sleeve, the die core comprises a conical part and a flat part which are inserted into the die sleeve, the center of the die core is provided with a center hole for a cable core to pass through, and the die sleeve is provided with a through hole. The die sleeve comprises a main body part integrally connected with the die core and an adjusting part which is detachably connected with the main body part and is used for replacing and changing the thickness of the sheath. According to the utility model, the sheath is divided into the main body part and the adjusting part, and the concentricity of the sheath is ensured by integrating the main body part and the mold core. The adjusting part can be detached and replaced with different specifications to adjust the molding cavity so as to produce cable sheaths with different specifications and thicknesses, so that the universality of the integrated mold is enhanced; and the adjusting part can be detached to clean the internal molding cavity.

The application discloses a material concentric assembling device and method for pipe mother production and belongs to the technical field of pipe mother production equipment, which comprises a sliding guide device arranged horizontally, a self-overturning supporting device and a common supporting device; the self-overturning supporting device supports a conductor inner screen which is placed horizontally and abuts against the sliding guide device; the common supporting device supports an insulating outer screen which is placed horizontally; the self-overturning supporting device comprises a vertical support, a sliding sleeve one, an overturning reference frame, an overturning seat, a supporting wheel one rotatably installed at the left and right ends of the overturning seat, a mounting seat, a left air cylinder, a right air cylinder and an infrared distance sensor; the self-overturning supporting device in the device detects the position of the insulating outer screen through the infrared sensor, automatically overturns the supporting posture and does not need manual lifting, so that the assembling time of a single pipe mother is shortened, and the assembling efficiency and concentricity are improved; only one worker is needed to push the insulating outer screen to complete the assembling, and two cooperative workers are reduced.