42results about How to "Simple structure control" patented technology

A pearl holing machine comprises a substrate and a clamping mechanism and a punching mechanism which are fixed on the substrate; a charging mechanism and a guiding mechanism are arranged on the base; the charging mechanism comprises a material hopper, a charging die and a pushing mechanism; a discharging port is arranged below the material hopper; the charging die is provided with a material containing cavity; the pushing mechanism comprises a push rod, a pushing power source and a transmission mechanism; once the pushing power source is actuated for one step, the push rod pushes one pearl into the guiding mechanism; the guiding mechanism comprises a guide rail of which the inlet receives the pearl from the charging die; the outlet of the guide rail guides the pearl into the clamping mechanism; the clamping mechanism comprises a fixing part and a movable part; the movable part is connected with a clamping cylinder; a clamping cavity is arranged between the fixing part and the movable part; the punching mechanism comprises a drill bit, a drill bit motor and a holing cylinder; the punching mechanism is positioned above the clamping mechanism; a discharging baffle is arranged below the clamping mechanism and is connected with a discharging driving member; the discharging baffle closes or opens the clamping cavity. The pearl holing machine has the advantages of automatic charging and automatic holing.

The invention discloses a reducible and biodegradable comb type high polymer gene vector and a preparation method of the same. The structure of the vector is as shown in the following formula, wherein CP is a cationic polymer with low molecular weight between 600 and 30000; F1 and F2 are groups capable of interaction; F1 or F2 contains a disulfide bond; M is a main chain unit structure of the polymer; n equals to 10-500; m is smaller than n; m equals to 0-400; l equals to 0-800; and l, m and n are integers. In the invention, the comb type high polymer gene vector has small cytotoxicity, gene DNA can be well bound and compounded under physical conditions so as to enter cells; and the carried genes can be released as the reducing environment in the cells can rupture quickly. The result showthat the reducible and biodegradable comb type high polymer gene vector has higher transfection efficiency and lower cytotoxicity compared with 25kDa PEI (polyether imide); moreover, the preparation method is simple, and the structure is easy to control.

The invention discloses a preparation method of a nitrogen-rich covalent organic framework material connected by full conjugated carbon-carbon double bonds, and relates to the technical field of covalent organic framework material preparation. The method comprises the following steps: adding 1,3,5-trimethyl-2,4-dicyanopyridine, 2,4,6-tris(p-aldehyde phenyl)-1,3,5-triazine, anhydrous piperidine andanhydrous N,N-dimethylformamide into a pressure bottle, carrying out a reaction of the materials by heating under argon gas protection, collecting a solid by a vacuum filtration method after the reaction is completed, washing the solid with dichloromethane and water, and collecting the solid and then performing vacuum drying for 24 h to obtain a yellow solid product, namely the nitrogen-rich covalent organic framework material connected by full conjugated carbon-carbon double bonds. The preparation method has the advantages of simple equipment, convenient operation, simple and easy synthesissteps and low cost, and the prepared material has a regular pore structure, rich active sites, and efficient electron conduction capability.

The invention belongs to the field of pulse power generators and discloses a permanent-magnet axial-flux semi-hollow pulse power generator comprising a rotor, a stator, a rotating shaft, a housing, and an end cap. The rotor comprises inner and outer magnetic poles, a permanent magnet and a compensation plate. The permanent magnet is arranged between the inner and outer magnetic poles of the rotor. The inner and outer magnetic poles cooperate with the permanent magnet to convert radial flux into axial flux. The compensation plate covers the tops of the inner and outer magnetic poles. The rotor rotates together with the rotating shaft. The stator is formed by pouring non-magnetic material on a winding and is fixed on the housing. The magnetic conductive material of the rotor and the non-magnetic conductive material of the stator form a semi-hollow structure. The semi-hollow pulse power generator simplifies a motor excitation system, reduces excitation loss, and increases motor efficiency. Brushless structure increases the reliability of the motor.

The invention belongs to the field of high polymer materials, and relates to polysiloxazane. The polysiloxazane is composed of a structural unit I represented by a formula (a) or / and a formula (b) anda structural unit II represented by a formula (c) or / and a formula (d), wherein R1 and R2 are the same or different and are selected from hydrogen, C1-C20 alkyl, vinyl, phenyl, allyl or trifluoropropyl, R3 and R4 are selected from hydrogen and C1-C20 alkyl, vinyl, phenyl, allyl or trifluoropropyl, R3 and R4 are not hydrogen at the same time, R5 and R6 are selected from H, methyl, ethyl, propyl orphenyl, m, n, p and q are integers from 1 to 1000, and the values of m, n, p and q are the same or different.

The invention relates to the technical field of 3D measurement, and provides a cosine fringe field projection module. The cosine fringe field projection module is particularly suitable for being usedin miniaturized 3D measuring equipment. According to the cosine fringe field projection module, binarized cosine patterns are adopted, the problem of inaccurate transmittance in the process of manufacturing a transmission-type cosine optical grating is solved, and meanwhile the manufacturing cost is greatly reduced; the four binarized cosine patterns satisfying a 90-degree phase shift relationshipare designed on a same negative film, and then through a projection imaging camera lens and an expansion camera lens, in cooperation with a channel selection circuit, four cosine fringe fields satisfying four-step phase shift are obtained. The cosine fringe field projection module is simple in structure and control, small in size and particularly suitable for 3D measuring equipment requiring whole-machine size miniaturization; meanwhile, based on the simple structure and control and low-cost components, the cost of the projection module is far lower than that of a programmable projection method.

The invention relates to an atmosphere plasma processing device suitable for an aspheric optical element with large caliber, and belongs to the field of optical processing. The atmosphere plasma processing device aims to solve the problem that the conventional mechanical polishing technology is low in processing efficiency and cannot meet the large-batch requirements on optical elements with large caliber in the optical field. A rotary electrode of the atmosphere plasma processing device is arranged in a sealing hood and is connected with the output end of a radio frequency power supply to be used as an anode for atmosphere plasma discharge. The upper end of the sealing hood is connected to a work shaft in an insulating manner, and an optical element to be processed is clamped on a work platform. The work platform is grounded as the cathode for atmosphere plasma discharge. A discharge gap is formed between the rotary electrode and the surface to be processed of the optical element to be processed. The atmosphere plasma processing device can be used for carrying out non-contacted atmosphere plasma processing on the aspheric optical surface with large and high in processing speed, and the edge effect is avoided.

The invention discloses a power amplifying device and a linear adjuster. The power amplifying device comprises a first transistor, a second transistor and a driving circuit of the second transistor, wherein the first transistor and the second transistor are connected in series; the driving circuit of the second transistor comprises a third transistor, a compensating network and a voltage source; the first end of the third transistor is connected with a driving signal end and the first transistor respectively; the second end of the third transistor is connected with a connecting end between the first transistor and the second transistor; the third end of the third transistor is connected with the second transistor and the compensating network respectively; the compensating network is also connected with the voltage source. By the adoption of a push- pull structure composed of double N-shaped transistors provided by the invention, without transformer coupling and independent control on the upper and lower transistors, the characteristics of simple structure, simple control, high efficiency and the like can be realized, and the defect that an existing linear adjuster is inapplicable for a great-bandwidth and large-power application site or more problematic can be overcome.

The invention provides a testing device for a memory chip in a hybrid circuit. capable of achieving fault positioning and diagnosis at the same time; The device comprises a built-in self-test circuitand a bus multiplexing circuit. The built-in self-test circuit and the bus multiplexing circuit are arranged on the main control protocol chip; The built-in self-test circuit is connected with a selection signal port of the bus multiplexing circuit. The built-in self-test circuit is connected with the bus multiplexing circuit through the test mode control bus, the test mode address bus and the test mode data bus. The main control protocol chip also comprises a functional memory controller; Wherein a control bus of the main control protocol chip is connected with a control port of the memory chip, a data bus of the main control protocol chip is connected with a data port of the memory chip, and an address bus of the main control protocol chip is connected with an address port of the memorychip; An output data bus of the main control protocol chip is connected with an output data port of the memory chip; And the built-in self-test circuit and the functional memory controller read data on the memory chip through the output data bus.

The invention relates to the technical field of photographing light supplement and particularly discloses a light supplement lamp for photographing through handheld devices of a mobile phone, a PDA and the like. The light supplement lamp at least comprises an annular aperture, wherein the annular aperture is an unclosed loop; the annular aperture comprises an arc-shaped gap; and a central angle corresponding to the arc-shaped gap is 50-75 degrees. The light supplement lamp can form light shadows on a facial cheek, a jaw and a neck when applied to self-photographing light supplement especially; the level sense of the light on the face is more abundant by light and shade contrast; the photographing effect is more three-dimensional; the color of the skin is more natural; and the thin face effect is generated through the level sense of the light.

The invention discloses an antenna transmission device comprising a driving shaft, a transposition component, a position selecting gear and at least one output gear; the transposition component is arranged on the driving shaft, and can be driven by the driving shaft to rotate only in the first direction and link to any one output gear, so that revolution and position selection are achieved; the position selecting gear is an outer gear ring arranged on the driving shaft and linking to the transposition component, and can be driven by the driving shaft to rotate only in the first direction, so that the transposition component is driven to rotate, and the output gear lining to the transposition component can be driven to output bi-directionally, namely in the forward direction or in the reverse direction. The antenna transmission device disclosed by the invention has the advantages of simple structure control, low cost, high integration level, easy assembly and replacement, and is suitable for scale industrialization, and the two-way output of a plurality of phase shifters can be controlled by a motor.

The invention discloses a weaving rolling mechanism, which comprises a stander and a rolling drum which is installed on the stander and driven by a power device, and the weaving rolling mechanism is characterized by also comprising a driven roller, wherein the driven roller is separated from the rolling drum and installed on the stander through a supporting arm, the driven roller is provided with a pressure sensor, and the pressure sensor is connected with a drive device. The weaving rolling mechanism is simple in structure and low in application cost.

The invention discloses a screening device for separating corncobs from pearls. The screening device comprises a base, and a discharging mechanism, a vibration conveying mechanism and a reciprocatingmechanism are installed on the base. An electrostatic adsorption system is additionally arranged on the reciprocating mechanism, the electrostatic adsorption system comprises an electrostatic adsorption surface moving along with the transmission nut seat, and the electrostatic adsorption surface is composed of an electrode and an insulating sheath covering the outer surface of the electrode. The electrodes are supplied with current by a power supply device, the power supply device is controlled by an operating switch, and the electrostatic adsorption surface adsorbs corncobs on the vibration bed body and moves to the position above the material return box along with the transmission nut base, so that the corncobs fall into the material return box, pearls fall into the collecting box from the vibration bed body, and the problems which cannot be solved through traditional mesh screen screening when the grain sizes of the corncobs and the pearls are the same are solved.

The invention discloses a transmission gear selecting and shifting row fixing mechanism which comprises a gear selecting and shifting shaft, a cam, a gear selecting row fixing pin and a gear shifting row fixing pin. The cam is installed on the gear selecting and shifting shaft, a gear selecting row fixing line and a gear shifting row fixing line are separately arranged on the cam, the gear selecting row fixing pin can move on the gear selecting row fixing line, and the gear selecting row fixing pin can move on the gear shifting row fixing line. The transmission gear selecting and shifting row fixing mechanism further comprises a control cover, the gear selecting and shifting shaft is installed on the control cover, and the gear selecting and shifting shaft can axially move or rotate relative to the control cover. According to the transmission gear selecting and shifting row fixing mechanism, the problems of uneven gear selecting / shifting force of a transmission, gear shifting clamping stagnation, gear shifting handle shaking, transmission out-of-gear and the like can be effectively solved, the gear selecting and shifting performance of the manual transmission is improved, and the gear shifting comfort is improved; and the gear selecting row fixing line and the gear shifting row fixing line are separately designed, so that the structure control is simpler, and the quality and consistency control of gear selecting and shifting cam parts is facilitated.

A thermoplastic resin composition of the present invention has high impact resistance, not lowering the weather resistance thereof, even though the amount of an impact resistance improver added thereto is small. The thermoplastic resin composition contains 100 parts by weight of (A) a thermoplastic resin and from 0.5 to 20 parts by weight of (B) a graft copolymer, wherein the graft copolymer (B) contains from 70% to 99% by weight of a crosslinked core (b2) prepared through polymerization of a monomer for the core (b2), containing 70% by weight or more of an acrylate, in the presence of from 0.5% to 20% by weight of a non-crosslinked seed (b1) having a weight-average molecular weight of 40,000 or less, and from 0.5% to 10% by weight of a shell (b3) prepared through polymerization of a monomer for the shell (b3) containing 50% by weight or more of a methacrylate, and the thermoplastic composition further contains from 0.01 to 3.0 parts by weight of (C) a water-soluble polymer compound having the property of forming a physical gel, relative to 100 parts by weight of the graft copolymer (B).

A card cover recognition device for an automatic card dispenser comprises a bar code and a recognizer, wherein the bar code comprises a bar code label and a radio frequency label, the bar code label comprises a label base body, an encoding zone and a numbering zone, the encoding zone comprises identification blocks, and the identification blocks are black or white; the recognizer comprises a bar code recognition device and a radio frequency recognition device; the bar code recognition device comprises a plurality of reflective infrared photoelectric sensors, and each reflective infrared photoelectric sensor corresponds to one identification block; when the identification blocks are black, the reflective infrared photoelectric sensors output low electric level; when the identification blocks are white, the reflective infrared photoelectric sensors output high electric level; the bar code recognition device is connected with a bar code decoding circuit, corresponding positions are set 0 by the bar code decoding circuit when the low electric level is output by the reflective infrared photoelectric sensors, and corresponding positions are set 1 when high electric level is output. The card cover recognition device has the advantages that the card cover code recognition efficiency and recognition quality can be ensured.

The invention relates to a method for controlling running of a wheeled interplanetary exploration patrol vehicle. When the vehicle runs, and a wheel upright post swings forwards from backwards, a wheel connected with the wheel upright post rolls and rotates forward to reduce resistance of swing; when the wheel upright post swings backwards from forwards, the wheel connected with the wheel uprightpost stops rotating to increase thrust of soil to the wheel. Vehicle running can be realized by utilizing the difference of acting force of the ground to the wheel between swings in two directions. The method realizes step running of the vehicle, and not only is simple in structure control, but also can greatly improve the trafficability of the vehicle on loose ground and a loose slope; meanwhile, the method can realize necessary functions of entire vehicle furl and the like to a deep space exploration vehicle.

The invention relates to the field of 3D measurement technology, and provides a cosine fringe field projection module, which is especially suitable for use in miniaturized 3D measurement equipment; the invention adopts a binary cosine pattern to avoid the inconsistency of transmittance in making a transmission cosine grating Accurate problems, while greatly reducing production costs; design four binarized cosine patterns that satisfy the 90° phase shift relationship on the same film, and then use the projection imaging lens and expansion lens, with the channel selection circuit, to obtain four-step phase shifted four cosine fringe fields; the structure of the present invention is simple to control and small in size, and is especially suitable for 3D measuring equipment that requires miniaturization of the overall volume; at the same time, based on simple structure and control and low-cost components, the cost of the projection module of the present invention is much lower Lower than programmable projection mode.

A device structure whereby an excellent tunable laser does not require a highly complicated wavelength control circuit, and delivers a high output, and excels in wavelength stability; and a structure of an optical module incorporating the laser; and a method for manufacturing the laser and the optical module. The wavelength of the laser is varied continuously with the single electric signal in the tunable wavelength range by setting the laser resonator length, the electric driving conditions of the laser at the time of tuning the wavelength, and the operating temperature to be in appropriate ranges, respectively. The device structure whereby improved laser gain, decreased electric resistance, and reduced heat resistance is attained by setting the waveguide width, particularly at part of or all parts of the laser resonator waveguide, to a wide width that allows multiple transverse modes to be sustained and setting both the width and the laser resonator length to appropriate values, respectively. By employing a self-image-formation effect resulting from the multi-mode interference effect, mode conversion loss in the laser resonator is reduced and, connection with an optical fiber is facilitated because the light intensity distribution at an emitting facet of the laser becomes a single-peaked lowest-order mode.

The invention discloses a high-pressure waterway control system, which comprises a high-pressure water pump and an operation element control valve, wherein the high-pressure water pump is connected with the operation element control valve through a pipeline; the pipeline is provided with a discharging valve; the water outlet of the discharging valve is communicated with a water tank; the discharging valve is connected in parallel with an easy-start valve; and the water outlet of the easy-start valve is communicated with the water tank. Due to the adoption of the high-pressure waterway control system, the functions of no-loading start, automatic charging and safe overflow safely are compounded; and the high-pressure waterway control system has the advantages of simple and compact structure, convenience for installing and adjusting, reduction in the cost, improvements on the system reliability and the maintainability, and the like.

The invention relates to a method for preparing carbon airgel from a hydrogel precursor material through a hydrothermal process, belongs to the field of new materials, and solves the problems of complicated carbon preparation process and high cost of supercritical drying in the prior art. The invention comprises the following steps: step 1, acidifying chitosan with dilute hydrochloric acid, and forming a mixed solution with water-soluble carbohydrates; step 2, adding polysorbate nonionic surfactant and liquid paraffin, and then adding pentamethylene glycol Aldehydes to form hydrogels; step 3, placing the hydrogels in a reactor for hydrothermal reaction to obtain primary carbonized products; step 4, cleaning the primary carbonized products and replacing them with two-stage solvents; step 5, dissolving the primary carbonized products After further heat treatment, the microstructure was characterized by scanning electron microscopy, and the pore properties of the sample were determined by nitrogen adsorption. The invention utilizes low-cost raw materials to generate the carbon airgel structure in one step; utilizes two-stage solvent replacement to realize normal-pressure drying of the carbon airgel structure.

The invention relates to a dual-motor transmission structure, which comprises a first motor M1, a second motor M2, a power coupling transmission unit, a walking driving force transmission unit and a walking driving force output shaft S-out, and is characterized in that the power coupling transmission unit is in transmission connection between an output shaft of the first motor M1 and an output shaft of the second motor M2; a walking driving force output end is arranged on the walking driving force output shaft S-out; the driving system controls power output in a coupling mode through the main control system and is used for driving a walking system in the electric engineering vehicle, the needed vehicle state is achieved, the flexible characteristic of double-motor control is utilized, gearbox gear shifting is omitted, the working condition requirement for high-speed transition of the engineering vehicle is met, the economical efficiency and reliability of the whole vehicle are improved, and the driving system is simple in structure control and low in cost, power interruption is avoided; the whole vehicle is more compact in arrangement, space is saved, the motor often works in a high-efficiency interval, the overload working condition is few, and the service life of the motor is prolonged.

The invention discloses a clamp ring spraying manipulator device and a method; the clamp ring-spraying manipulator device comprises two symmetrical clamp ring assemblies, a connecting rotary shaft, aclamp ring assembly drive mechanism, a connecting sleeve, connecting rods, a connecting flange bracket, a large fan-angle direct-sunlight rotating nozzle and a gas-liquid two-phase flow mixer, whereinthe tails of the two clamp ring assemblies are connected with the output rod of the clamp ring assembly drive mechanism through two connecting rods, the connecting rods are movably hinged with the tails of the clamp ring assemblies through the connecting sleeve, two connecting lugs are connected through the connecting rotary shaft, the large fan-angle direct-sunlight rotating nozzle is installedat the bottom of the clamp ring assembly drive mechanism through the connecting flange bracket, and the large fan-angle direct-sunlight rotating nozzle is connected with the liquid outlet of the gas-liquid two-phase flow mixer through a gas-liquid two-phase hose. The clamp ring spraying manipulator device can quickly replace products, quickly and accurately position and rotate, and move up and down to complete the surface treatment of each working surface of each product, and solve the problems of safety and difficult operation during the manual surface treatment of the product.

The invention discloses a reduction sensitive polyethyleneimine derivative containing modified disulfide bonds, having a chemical formula: PEI-(ASSA-PEI)n-(ASSB-PEI)m, wherein PEI is polyethyleneimine, the component of A is C10H14O4N4, the component of B is C3H5ON, n=0-30; m=0-30; and n and m are not equal to zero simultaneously. The weight-average molecular weight of the reduction sensitive polyethyleneimine derivative is 5,000-80,000. Through simple and special modification and click chemistry, the polyethyleneimine is connected into modified polyethyleneimine with high molecular weight through reductive and degradable disulfide bonds. The invention has the advantages of simple method, easy structure control, less amino loss for reaction and higher amino utilization ratio. The obtained product has the characteristics of bio-reduction and degradation, has less cytotoxicity, can well bind and compound gene DNA under a physiology condition, enters cells to release carried gene because the reduction environment in the cells can be broken more rapidly, and has higher gene expression transfection efficiency. Results show that the modified polyethyleneimine derivative has higher transfection efficiency and lower cytotoxicity than 25kDa PEI.

The invention discloses a wireless bidirectional charging and discharging system for an electric vehicle, which includes a first circuit and a second circuit; the first circuit includes a bidirectional AC-DC circuit, a first bridge circuit, a first coupling mechanism and a first control circuit, and the first circuit includes a bidirectional AC-DC circuit, a first bridge circuit, a first coupling mechanism and a first control circuit. The second circuit includes a second coupling mechanism, an active compensation circuit, a second bridge circuit, a bidirectional DC-DC circuit and a second control circuit. The first circuit and the second circuit establish a wireless connection and transmit vehicle information and instructions before charging and discharging, and then transmit charging information and shutdown instructions through the wireless connection after charging and discharging, avoiding real-time wireless connection during energy transmission. Transmit control information; no matter the system is working in charging or discharging mode, after the transmitter is started, only the receiver needs to perform closed-loop regulation according to the instructions to realize the two-way transmission of grid energy and battery energy. The invention does not adopt a receiving end regulation mode, and has the advantages of simple control, strong anti-offset regulation ability, wide voltage adaptability range, high transmission efficiency and the like.

The invention relates to the technical field of supplementary light for photographing, and specifically discloses a supplementary light for photographing with handheld devices such as mobile phones and PDAs, which at least includes an annular aperture, the annular aperture is a non-closed ring, and the annular aperture has an arc shape. The notch, the arc-shaped notch corresponds to a central angle of 50° to 75°. The supplementary light of the present invention is especially used for selfie supplementary light, forming light shadows on the cheeks, chin and neck of the face, using light and dark contrast to make the light layering of the face richer, the photo effect is more three-dimensional, and the color of the skin is more vivid. Natural, and creates a face-lifting effect through the layering of light.

The invention discloses a tracking filling part for a filling machine. The tracking filling part comprises a rack, a filling needle frame assembly, two first swinging arms and two second swinging arms, wherein the two first swinging arms are hinged to the rack; the two second swinging arms are hinged to the filling needle frame assembly; the first swinging arm and the second swinging arm which are on the same side are hinged with each other; a connecting rod is hinged between the two first swinging arms or between the two second swinging arms; at least one of the first swinging arms is connected with a first driving mechanism which is used for driving the at least one first swinging arm to swing around the rack; at least one of the second swinging arms is connected with a second driving mechanism which is used for driving the at least one second swinging arm to swing around the corresponding first swinging arm; the rack, the connecting rod and the two first swinging arms form a parallelogram mechanism, and the filling needle frame assembly and the two second swinging arms form another parallelogram mechanism; or, the filling needle frame assembly, the connecting rod and the two second swinging arms form a parallelogram mechanism, and the rack and the two first swinging arms form another parallelogram mechanism. The tracking filling part for the filling machine has the advantages of being simple in structure control, low in cost, low in pollution risk and the like.

The invention discloses a power amplifying device and a linear regulator, comprising: a first transistor, a second transistor and a drive circuit for the second transistor, the first transistor is connected in series with the second transistor, and the drive circuit for the second transistor Including a third transistor, a compensation network and a voltage source, the first end of the third transistor is respectively connected to the drive signal end and the first transistor, the second end is connected to the connection end of the first transistor and the second transistor, and the third end The second transistor is connected to a compensation network respectively, and the compensation network is also connected to a voltage source. The push-pull structure composed of double N-type transistors provided by the present invention does not require transformer coupling, nor does it require independent control of the upper and lower transistors, and can realize the characteristics of simple structure and control, high efficiency, etc. In applications with high bandwidth and high power, there may be more problems.

An automatic pearl drilling device is provided with a rack and a discharging mechanism. The rack is provided with a hopper, a clamping mechanism, a drilling mechanism and a feeding mechanism. The feeding mechanism comprises a guide pipe, a guide piece and a feeding piece connected with the guide pipe and the feeding station, wherein the guide piece enables a single pearl to move from the feeding station to the drilling station and the discharging station in sequence. The feeding piece only allows one pearl to enter the feeding station every time. The drilling station aligns at the drilling mechanism, the discharging station is communicated with the discharging mechanism, and the guide pipe is inclined downwards. The clamping mechanism aligns at the drilling station and compresses pearls towards a guide plate. The drilling mechanism comprises a drill bit, a drilling motor for driving the drill bit to rotate, a feeding motor and a feeding drive mechanism, and the feeding motor and the feeding drive mechanism are used for enabling the drill bit to be fed towards pearls and enabling the drill bit and the drilling motor to move back and forth continuously. The automatic pearl drilling device has the advantages that pearls are positioned stably in the drilling process, and requirements for equipment manufacturing and installation accuracy are low.