718 results about "Tooth part" patented technology

The invention discloses a manufacturing method of a frameless torque motor stator core, the stator core comprises a stator yoke part, a stator tooth part and a stator coil, the stator yoke part is in a circular ring shape, the stator tooth part is in a sun tooth type structure, the stator tooth part comprises a circular ring part, a tooth boot part and a tooth body part, the stator tooth part is embedded in the stator yoke part, and the tooth body part is in a sun tooth type structure. The plurality of tooth body parts are uniformly distributed, high-temperature-resistant insulating films are prepared on the surfaces of the stator yoke part and the stator tooth parts, and the stator coils are arranged on the peripheral sides of the tooth body parts in a sleeving manner; the manufacturing method comprises the following steps: S100, manufacturing the stator yoke part and the stator tooth part, and carrying out coating treatment; s200, winding to form a stator coil; s300, assembling a stator iron core; s400, welding a wire pin; s500, pouring glue and drying; s600, boring and shaping: boring the inner side of the circular ring part and the solidified potting glue, and boring off the circular ring part, so that two adjacent tooth shoe parts are completely isolated, and the closed slot of the stator core is bored to form an open slot; and S700, carrying out performance detection.

The invention discloses a formed milling cutter tool system for machining a jaw and a machining method. The formed milling cutter tool system comprises a formed milling cutter. The forming milling cutter comprises a milling cutter disc body, a cutter shaft mounting hole formed in the position of the central axis of the milling cutter disc body, a plurality of composite-shape cutting teeth arranged on the outer circle of the milling cutter disc body and arranged at intervals in the circumferential direction, and tooth grooves formed between every two adjacent composite-shape cutting teeth in the circumferential direction. The composite-shaped cutting teeth are provided with shovel rear angles in the circumferential direction. Each composite-shape cutting tooth comprises a main cutting tooth part, a transition cutting tooth part and an auxiliary cutting tooth part which are adjacently connected in the axial direction, and each main cutting tooth part comprises a section of sawtooth-shaped dense teeth, a section of sawtooth-shaped comb teeth and a section of linear teeth which are adjacently connected in sequence in the axial direction; a special milling cutter for dense tooth part machining and a dense tooth part on-line strong cold abrasion monitor are further arranged in a matched mode. The invention provides a systematic solution integrating a special cutter, online wear monitoring and auxiliary forced cooling.

The utility model relates to a cleaning equipment brush head, cleaning equipment and a cleaning system. The cleaning equipment brush head comprises a main body part; the rolling brush is arranged on the main body part and can rotate relative to the main body part; the comb teeth are installed on the main body part, each comb tooth comprises a plurality of tooth parts arranged in the first direction, and a first acute angle is formed between the extending direction of at least part of the tooth parts and the first direction; wherein the first direction is the axis direction of the rolling brush. The brush head of the cleaning equipment has better anti-winding capability.

A door opening and closing device according to one embodiment comprises: a driving unit; and a link gear rotating forward or backward with respect to a rotation center in accordance with an operation of the driving unit. A tooth part connected to the driving unit is provided on one side of the link gear with respect to the rotation center, and a coupling unit coupled to a link pushing a door is provided on the other side of the link gear with respect to the rotation center. A first distance between the rotation center and the coupling unit is greater than a second distance between the rotation center and the tooth part.

The utility model relates to the technical field of daily hardware fittings, in particular to a single-tooth hinge. The single-tooth hinge comprises a first auxiliary rod, a second auxiliary rod, a supporting rod and a base. The supporting rod is rotationally connected with the first auxiliary rod and the second auxiliary rod. The second auxiliary rod is provided with a second rotating shaft, and the first auxiliary rod is provided with a first rotating shaft; a single-tooth structure is further arranged between the end of the first auxiliary rod and the base and comprises a single-tooth part arranged on the first auxiliary rod and a protruding part arranged on the base and clamped into the single-tooth part. Due to the fact that only one single-tooth part and one protruding part are arranged, compared with a structure with multiple tooth parts, the damage probability is greatly reduced, the use frequency is improved, long-term stable push-pull operation is ensured, and due to the fact that the single-tooth structure is relatively simple, maintenance and repair are relatively easy.

The invention provides an anastomat body and an anastomat. The anastomat body comprises a first gear, a rotating head, a second gear and a power assembly. The first gear includes a first tooth portion. The second gear includes a second tooth portion engaged with the first tooth portion. The rotating head is connected with the nail bin assembly. The staple cartridge assembly comprises a jaw and a cutting knife. The power assembly drives the first gear to rotate, and the first gear drives the second gear to rotate. The rotating head defines a containing space, and at least part of the second gear is located in the containing space and connected with the rotating head so as to drive the rotating head to rotate. The rotating head drives the nail bin assembly to circumferentially rotate around the center shaft of the nail bin assembly. Circumferential rotation of the nail bin assembly is controlled in an electric mode, operation is convenient, and the operation precision and efficiency of an operation are improved.

The invention relates to the technical field of display screen detection, in particular to a visual detection device for brightness uniformity of a display screen. Comprising a rack, a transmission system installed on the rack and a rotating frame rotating intermittently, a feeding and discharging station, a vibration detection station, a shaking detection station and a pressing detection station are arranged on the rack in the clockwise direction, and four screen clamping systems are arranged on the rotating frame. The screen clamping system comprises a cradle, a transmission wheel rotationally connected to the rotating frame, a vibration detection frame slidably connected to the rotating frame and a rack plate installed on the vibration detection frame, three sector tooth sections and three empty tooth parts are alternately arranged on the transmission wheel, the three sector tooth sections are alternately meshed with the rack plate, and the central angles of the sector tooth sections are different from one another. The device has the beneficial effects that aiming at the problem that a traditional detection device cannot simulate composite working conditions of vibration, swing and pressing and causes missing detection of hidden defects, a collaborative link of defect pre-excitation, full-dimensional capture and dynamic verification is constructed through a three-station linkage design of vibration detection, shaking detection and pressing.

The utility model discloses a permanent magnet synchronous motor which comprises a rotor, a stator and a rotating shaft, the rotating shaft is arranged at the circle center of the rotor in a penetrating mode, the rotor is embedded in the stator, the middle section of a tooth portion of the stator is arranged in an arc shape, the two ends of the tooth portion of the stator are arranged in a flat cutting mode, and air gaps of the stator and the rotor are arranged in an uneven mode. The permanent magnet synchronous motor comprises a rotor and a stator, the outer circle of the rotor is of a two-section chamfering structure, permanent magnets of a V-shaped structure are arranged in the rotor, and the permanent magnets are distributed at intervals in the circumferential direction of the rotor, according to the permanent magnet synchronous motor, the pole-arc coefficient and the effective air gap length of the motor are adjusted through the outer circle shape of the rotor and the tooth tip shape of the stator, and therefore the motor efficiency is improved. Therefore, the air gap flux density harmonic amplitude is reduced, and the cogging torque and the torque ripple of the motor are reduced.

The utility model relates to an anti-backlash damping planetary gear transmission device in the technical field of planetary gear transmission, which comprises a sun gear, a planet carrier, a plurality of planetary gears and an inner gear ring, the plurality of planetary gears are arranged on the planet carrier in a staggered way, so that the front side surfaces of the tooth parts of part of the planetary gears are in contact with the tooth parts of the inner gear ring in the transmission process; the reverse side surfaces of the tooth parts of the other part of planetary gears are contacted with the tooth parts of the inner gear ring; when the sun gear is driven in the forward direction or the reverse direction, at least part of the planetary gears are meshed with the sun gear and the corresponding front face or the corresponding reverse face of the inner gear ring all the time, and therefore the purposes of eliminating backlash of a gear set, restraining vibration and reducing noise are achieved.

The utility model discloses a linear motor, which comprises a stator and a rotor, and the stator or the rotor comprises an iron core, a coil winding and a cooling pipe. The iron core comprises a yoke part and a plurality of tooth parts arranged on the yoke part. The coil winding comprises a plurality of coil units which are wound on the tooth parts respectively, and each coil unit comprises at least two layers of sub-coil units which are arranged at intervals in the extending direction of the tooth parts from the yoke part. The cooling pipe comprises a cooling section wound around the tooth part, and the cooling section is located between the two adjacent layers of sub-coil units of each coil unit and makes heat conduction contact with the two adjacent layers of sub-coil units. At least one of the opposing surfaces of the sub-coil unit and the cooling section is configured to have a planar extension. The enameled wire and the cooling pipe of the coil winding adopt a flat design, so that the heat exchange area of the enameled wire and the cooling pipe is increased, and the heat dissipation efficiency of the linear motor is improved.

The utility model discloses a strain clamp with stable connection, which comprises a clamp body, two inner sides of the clamp body are provided with clamping pieces, the clamping pieces are provided with pushing blocks, the pushing blocks are fixedly connected with the clamp body through screws, the clamping pieces are provided with threading holes for accommodating wire groups, and the threading holes are connected with the clamping pieces through screws. The wire clamp body is provided with a plurality of wire penetrating holes, the wire penetrating holes are provided with a plurality of clamping plates at equal intervals from left to right, the inner walls of the clamping plates are provided with a plurality of tooth parts protruding at equal intervals, and springs are arranged in the clamping pieces and act on the two ends of the clamping plates so that the clamping plates can move towards the middle of the wire clamp body. The tooth part is embedded into the outer wall of the wire group, so that the friction force is enhanced; the clamping force of the clamping plate is dynamically adjusted by pushing the clamping plate through the spring according to the real-time change of the diameter of the wire set, so that the tooth part is always kept in close contact with the outer wall of the wire set, the phenomena of connection loosening and loosening are effectively prevented, and the connection stability of the wire clamp body and the clamping plate is further improved through the screw.

The invention discloses an electric driving system and a vehicle, and the system comprises a driving motor which comprises a motor body and a motor shaft, and the output end of the motor shaft is provided with a motor shaft gear; the duplex gear shaft comprises a duplex gear shaft first tooth part and a duplex gear shaft second tooth part which are arranged at an interval; a duplicate gear, a synchronizer, an output gear and output shaft teeth are sequentially arranged on the output shaft at intervals, the duplicate gear and the output gear are both arranged on the output shaft in an empty sleeving mode, a duplicate gear first tooth part of the duplicate gear is meshed with the motor shaft gear, and a duplicate gear second tooth part of the duplicate gear is meshed with a duplicate gear shaft first tooth part; the output gear is meshed with the second tooth part of the duplicate gear shaft, and the synchronizer is arranged between the second tooth part of the duplicate gear and the output gear in a sliding mode and selectively combined with the second tooth part of the duplicate gear and the output gear when driven; and the differential mechanism is meshed with the output shaft teeth through the main reduction gear. Through the double-path transmission mechanism, the flexibility of speed ratio design is realized, and the double-path transmission mechanism has the advantages of compact structure and light weight.

This invention discloses an automated anterior tooth feature parameter extraction method and evaluation system based on computer vision, comprising: acquiring and visualizing a full-mouth scan image of a patient to be processed; cropping the corresponding tooth portion image; using Gaussian blur to eliminate specular reflection; using color segmentation to set thresholds for the H, S, and V channels respectively; separating the teeth and gingiva in each tooth portion image and performing morphological processing on each; extracting the tooth and gingiva portion contours using contour extraction methods; further refining the segmentation accuracy using the Chan-Vese active contour model algorithm and the energy function within the tooth portion contour; extracting corner points using the Shi-Tomasi corner detection method and then clustering them; extracting other important evaluation feature points through curve fitting and extreme value finding methods; and finally calculating relevant objective indicators for tooth evaluation and automatically generating the corresponding tooth score, thus completing the automated anterior tooth evaluation.

The invention provides a roller, a driving device and a preparation method thereof.The roller comprises a threaded section, a first tooth part and a second tooth part, the threaded section is located between the first tooth part and the second tooth part, the first tooth part comprises first teeth, the first tooth part is provided with first tooth grooves in the circumferential direction of the roller, and the second tooth part is provided with second teeth in the circumferential direction of the roller; the first tooth part comprises a first tooth, the first tooth part comprises a first tooth and a second tooth, the first tooth groove is located between two adjacent first teeth, the second tooth part comprises a second tooth, the second tooth part is provided with a second tooth groove in the circumferential direction of the roller, and the second tooth groove is located between two adjacent second teeth; the first teeth and the second teeth are arranged in a staggered mode in the axial direction of the pin roller. The requirement on machining precision is reduced; the driving device comprises a shell, a driving assembly and an output assembly, at least part of the driving assembly is located in the shell, the driving assembly is connected with the output assembly, the output assembly comprises a sleeve, a pin roller and a lead screw, the sleeve is in threaded fit with the pin roller, the pin roller is in threaded fit with the lead screw, and the pin roller is in threaded fit with the lead screw. And according to the preparation method, a mold is adopted, forming, demolding and other processes are carried out, the pin roller is formed, demolding is convenient, and the machining precision requirement is lowered.

The application discloses a machining method for a large-length-diameter-ratio shaft tooth part, which comprises the following steps: removing excess material from a forging blank; performing heat treatment and quenching and tempering to obtain a quenched and tempered blank; straightening the quenched and tempered blank; performing annealing stress relief treatment on the straightened blank to obtain an annealed blank; performing rough grinding on the outer circle of the annealed blank to obtain a ground blank; clamping and fixing the ground blank on a clamping mechanism to perform rough turning to obtain a rough blank; pre-grinding the rough blank to a target size; clamping and fixing the rough blank on the clamping mechanism to perform finish turning, and thus the large-length-diameter-ratio shaft tooth part is obtained. The machining method reduces the deflection of the large-length-diameter-ratio shaft tooth part to the maximum extent, effectively solves the technical problems of low qualified rate, high production cost and machining precision failing to meet product requirements in the machining of the large-length-diameter-ratio shaft tooth part, effectively enhances the rigidity of the large-length-diameter-ratio shaft tooth part, and effectively reduces the research and development cost of enterprises.

The utility model relates to a massage mechanism which comprises a massage execution unit, the massage execution unit comprises a transmission shaft and a left / right massage plate, the left / right massage plate is connected to the transmission shaft, the massage mechanism further comprises an adjusting unit used for adjusting the distance between the left / right massage plate, and the massage mechanism comprises a shell, an adjusting driving component, a transmission component and a left / right external member. The transmission part is provided with a main transmission part, a left transmission tooth part and a right transmission tooth part; the main transmission part is in transmission fit with an output shaft of the adjusting driving part; the transmission shaft is sleeved with the left / right sleeve piece, the left / right sleeve piece is provided with a left / right sleeve piece gear and a left / right sleeve body, the left / right sleeve piece gear is meshed with the left / right transmission tooth part, the left / right sleeve body is matched with the shell through a left / right hand thread, and the left / right sleeve body is connected with the left / right massage plate. The distance between the left massage plate and the right massage plate can be adjusted, massage comfort is improved, the structure is simple and compact, and adjustment is convenient.

The utility model relates to a speed reducer gear cleaning device which comprises a cleaning box, a conveying mechanism and a cleaning mechanism, the conveying mechanism and the cleaning mechanism are arranged in the cleaning box, the conveying mechanism comprises a first horizontal section, an inclined section and a second horizontal section, the first horizontal section is connected with the bottom end of the inclined section, and the second horizontal section is connected with the high end of the inclined section. A gear enters from the first horizontal section, passes through the inclined section and then is conveyed out from the second horizontal section, the cleaning mechanism comprises a first spray head, a rolling brush and a second spray head which are sequentially arranged, the first spray head and the rolling brush are located at the top of the first horizontal section, and the second spray head is arranged at the top of the inclined section; the transmission mechanism adopts the structure of the first horizontal section, the inclined section and the second horizontal section, the gear is cleaned by the first spray head, the rolling brush and the second spray head in sequence in the transmission process, multi-stage and multi-angle comprehensive cleaning is realized, and particularly, the cleaning effect on the inter-tooth part is obviously improved.

The application discloses a manufacturing method of a multi-material combined gear and the combined gear, and the manufacturing method of the multi-material combined gear comprises the following steps: preparing a base body; manufacturing the base body by using a first material, and the base body is provided with a mounting part; preparing a tooth part; manufacturing the tooth part by using a second material, the hardness of the second material is greater than that of the first material, the tooth part is provided with a matching part, and the outer periphery of the tooth part is provided with a tooth; and assembling and fixing; after the base body and the tooth part are prepared, the matching part is sleeved on the mounting part and is in interference fit with the mounting part, so as to fix the tooth part and the base body. The gear is divided into two parts of the tooth part and the base body and is manufactured by using different materials, the problem that a multi-step structure gear is difficult to form is solved, and the mechanical properties of each part of the gear are optimized, the combined design not only realizes the demand of the complex structure design of the gear, improves the hardness and wear resistance of the tooth part, and enhances the stability and reliability of the overall structure.

The application discloses a hydraulic control cog-type clutch four-wheel drive mechanism and a working method thereof, and belongs to the technical field of four-wheel drive mechanisms.The hydraulic control cog-type clutch four-wheel drive mechanism comprises a four-wheel drive piston and a hydraulic cylinder forming a sealed hydraulic cavity, wherein the hydraulic cavity is connected with a main oil path, the main oil path is provided with a switch valve, and the main oil path supplies oil to the hydraulic cavity when the switch valve is opened; the hydraulic cylinder is provided with an oil discharge hole; the oil discharge hole is communicated with the hydraulic cavity and discharges oil to a gearbox; the end faces of the four-wheel drive piston and the four-wheel drive output shaft are respectively provided with trapezoidal teeth capable of being engaged; the four-wheel drive output shaft is connected with a transmission output shaft through a mandrel; and the mandrel and the transmission output shaft realize radial positioning constraint of the four-wheel drive output shaft through a cylindrical roller bearing.The four-wheel drive piston is controlled by hydraulic pressure, the four-wheel drive piston and the four-wheel drive output shaft are combined or separated, power switching between two-wheel drive and four-wheel drive is realized, the tooth part structure of the cog-type clutch is designed, the cog-type clutch realizes self-centering function through the tooth end face inclination angle, and the mechanism realizes stable engagement, accurate limiting and self-locking function.

The application discloses a flux switching motor and a high-voltage circuit breaker. The flux switching motor comprises a rotor core, a bearing and a stator assembly. The stator assembly is internally provided with a mounting cavity. The bearing is arranged at the center of the mounting cavity. The rotor core is sleeved on the bearing. An air gap is formed between the stator assembly and the rotor core. The rotor core comprises a rotor tooth part and a rotor yoke part which are integrated. The rotor yoke part is sleeved on the bearing. The rotor tooth part is arranged at the outer periphery of the rotor yoke part and is provided with a plurality of tooth parts. The extension length of the rotor tooth part in the radial direction of the rotor core is greater than or equal to the extension length of the rotor yoke part in the radial direction of the rotor core. The high-voltage circuit breaker comprises the flux switching motor. The application relates to the technical field of motors and provides the flux switching motor and the high-voltage circuit breaker. The length of the rotor tooth part is increased to improve the torque and rotational inertia ratio of the motor, so that the dynamic response capability of the motor is improved.

The invention provides a stator, a motor, a pump body and a vehicle. Wherein the stator comprises a stator iron core, and the stator iron core comprises a yoke part which is of an annular structure; each tooth part comprises a tooth body and a tooth boot, and any two adjacent tooth parts and the yoke part enclose a stator slot; the inner circumferential wall of the yoke part between two adjacent tooth parts comprises two plane sections and a connection section, the connection section is connected between the two plane sections along the circumferential direction of the stator core, each plane section is connected with one tooth part, and the connection section comprises at least one of a cambered surface section and a folded surface section; the inner diameter of the stator core is recorded as D1, the number of the stator slots is recorded as Z, the circumferential width of the tooth body is recorded as t, and the radial width of the yoke part is recorded as h; wherein t is larger than or equal to h, and Z * t is smaller than pi * D1. According to the invention, the magnetic field distribution of the yoke part and the plurality of tooth parts can be adjusted, the reasonable slot space factor and current density of the motor are ensured, and the efficiency of the motor is improved.

The application discloses a heat exchanger air shower device, which comprises a fan, an atomizing tooth part and a liquid supply device. The liquid supply device is used for supplying liquid to the rotating part of the fan, so that the liquid can be centrifugally thrown out when the rotating part of the fan rotates at high speed. The atomizing tooth part is used for receiving the liquid thrown out by the rotating part of the fan to differentiate the liquid. The fan is used for blowing the liquid drops differentiated by the atomizing tooth part. The atomizing tooth part comprises movable teeth, which can be moved to adjust the tooth density of the atomizing tooth part in the circumferential direction of the working position part. Whether the movable teeth are located in the working position can be adjusted, thereby changing the circumferential tooth density of the working position, the size and / or the atomizing amount of the atomized particles can be correspondingly changed, the liquid content and the particle size distribution range of the liquid particles in the liquid-containing air body can be correspondingly changed, and the different heat exchange efficiency requirements in different states can be met, so that the problem that the heat exchange efficiency of the air shower device cannot be adjusted can be effectively solved.

The utility model provides a hinge that can lift the component and have the open-close device, the hinge that can lift the component includes: a rotating shaft, a rotating shaft carrier, a staddle, a drive slider, at least one drive gear and an axial slide rail assembly, the surface of the rotating shaft is provided with a spiral groove, the rotating shaft carrier is connected to the rotating shaft, the staddle is provided with a shaft hole, and the shaft hole is connected to the drive slider. The driving sliding block is provided with a screwing part, the screwing part is screwed in the spiral groove, the driving sliding block is further provided with a hollowed-out area, a tooth groove is formed in the side, away from the rotating shaft, of the hollowed-out area, the at least one driving gear is arranged in the hollowed-out area, and the driving gear comprises a tooth part and a convex column; the axial sliding rail assembly comprises an axial sliding rail arranged on the rotating shaft carrying frame, a containing hole formed in the driving sliding block and a sliding column. The opening and closing device comprises a base, an upper cover and the hinge capable of lifting the component. The hinge capable of lifting the component and the opening and closing device provided by the utility model have the function of enabling the upper cover and the base to be relatively separated while rotating.

The invention discloses a gas turbine damping blade vibration characteristic testing device and method under a multi-load loading condition, an electric heating furnace is internally provided with an induction heating coil, and a damping blade test piece is arranged in the induction heating coil; a tenon tooth fixture is mounted on the tenon tooth fixing base, and a tenon tooth part of the damping blade test piece is mounted in the tenon tooth fixture; a loading top block is mounted on the positive pressure loading disc and is in contact with a damping structure of the damping blade test piece; a modal vibration exciter is installed on the vibration excitation support, one end of the large-rigidity-ratio vibration excitation rod is connected with the modal vibration exciter, and the other end of the large-rigidity-ratio vibration excitation rod is connected with the blade body surface of a damping blade test piece. And the optical head is connected with a laser controller and is over against the furnace wall of the electric heating furnace. The change rule of the blade vibration characteristic along with each load factor can be obtained, and the accuracy of the damping blade vibration characteristic analysis method is verified.

The utility model belongs to the technical field of heat dissipation teeth, and particularly relates to a cooling channel for heat dissipation teeth, which aims at solving the problems that the heat dissipation area is small and more heat cannot be taken away, and adopts the technical scheme that the cooling channel comprises a heat dissipation tooth assembly, the heat dissipation tooth assembly comprises a plurality of heat dissipation teeth, and a liquid flowing channel is formed between every two adjacent heat dissipation teeth; the heat dissipation tooth assembly comprises a first heat dissipation tooth part and a second heat dissipation tooth part; the first heat dissipation tooth part and the second heat dissipation tooth part are connected with a connecting assembly. According to the utility model, the heat dissipation teeth are designed in the liquid cooling channel to increase the heat dissipation area, so that more heat of a product can be taken away, the weight of the product is reduced, the weight of the product is reduced, the cost of the product is reduced, and the energy is saved.

The application discloses a reduction gearbox, comprising a housing, a first transmission mechanism and a second transmission mechanism. The housing has an internal space, and the internal space of the housing comprises a first accommodating space, a second accommodating space, a third accommodating space and a fourth accommodating space. The first transmission mechanism is arranged in the internal space and comprises a first bearing, a first tooth part, a first shaft rod and a second bearing coaxial with each other, wherein the first bearing is accommodated in the first accommodating space, and the second bearing is accommodated in the third accommodating space. The second transmission mechanism is arranged in the internal space and comprises a third bearing, a second tooth part, a second shaft rod and a fourth bearing coaxial with each other, wherein the third bearing is accommodated in the second accommodating space, and the fourth bearing is accommodated in the fourth accommodating space. The housing is further formed with a first oil baffle, a first oil guide groove and a second oil guide groove.

The utility model relates to a portable pipe clamping device which comprises a first clamp, a second clamp and a fixing piece. A first arc chuck is arranged at one end of the first clamp, a lower protruding block is arranged at the other end of the first clamp, a second arc chuck is arranged at one end of the second clamp, and an upper protruding block is arranged at the other end of the second clamp. The first arc-shaped clamping head and the second arc-shaped clamping head are connected in a clamped mode, and a tooth part is arranged in the second arc-shaped clamping head. A groove is formed in the inner side of the first clamp, a protruding structure matched with the groove is arranged on the inner side of the second clamp, and the groove and the protruding structure are used for clamping a clamped catheter. Compared with the prior art, the tooth parts are arranged on the arc chucks, so that medical staff can conveniently adjust the force and tightness for clamping the first clamp and the second clamp. In addition, the medical tube clamping device is simple in structure, small in size, convenient to carry by medical staff and light in weight, the protective sleeve is further arranged outside the tube clamping device in a sleeved mode, the tube clamping device can be prevented from red pressing skin, and the comfort level of a patient is improved.

The invention relates to the technical field of manual hardware tools, in particular to a labor-saving shearing method of a bolt clipper. Comprising a left blade, a right blade, an upper pressing plate, a lower pressing plate, a left clamp body and a right clamp body, the front portion of the left blade is hinged to the upper pressing plate and the lower pressing plate through a rivet A, the rear end of the left blade is hinged to the front end of a lower connecting plate through a rivet B, and the rear end of the lower connecting plate is hinged to the left clamp body through a rivet C; the front part of the right blade is hinged with the upper pressing plate and the lower pressing plate through a rivet D, the rear end of the right blade is hinged with the front end of the upper connecting plate through a rivet E, and the rear end of the upper connecting plate is hinged with the right clamp body through a rivet F; the upper connecting plate and the lower connecting plate are hinged through a rivet G. The tooth portion of the upper connecting plate is meshed with the tooth portion of the front end of the left clamp body, and the tooth portion of the lower connecting plate is meshed with the tooth portion of the front end of the right clamp body. A first-stage lever, tooth transmission and a second-stage lever are integrated, the labor-saving effect is effectively achieved, the structure is compact, the operation radius is small, and the purpose of labor-saving workpiece shearing is achieved.

The invention provides a straight-bar stator punching sheet and a forming method thereof, a stator core, a stator structure and a motor. The straight-bar stator punching sheet comprises punching sheet split bodies (1), each punching sheet split body (1) comprises yoke parts (2), stator tooth parts (3) and shoe parts (4), the yoke parts (2) of the adjacent punching sheet split bodies (1) are connected into a whole through a connecting bridge (5), the punching sheet split bodies (1) are divided into at least two groups, the lengths of the shoe parts (4) of the at least two groups of punching sheet split bodies (1) are different along the arrangement direction, and the punching sheet split bodies (1) of different groups are alternately arranged along the arrangement direction. According to the straight-strip stator punching sheet, stator and rotor tooth groove harmonic waves can be effectively weakened, the influence of electromagnetic force is reduced, and motor noise is reduced.