CN117045903A

CN117045903A - A coreless cup motor-driven continuous needle-free injection device

Info

Publication number: CN117045903A
Application number: CN202311226172.6A
Authority: CN
Inventors: 陈凯; 尹文怡; 周华; 孟韧; 胡鸣豪; 任艳玲
Original assignee: Hangzhou Dianzi University
Current assignee: Hangzhou Dianzi University
Priority date: 2023-09-22
Filing date: 2023-09-22
Publication date: 2023-11-14

Abstract

The present invention designs a continuous needleless injection device driven by a coreless cup motor. By directly using the coreless cup motor to drive and through closed-loop control output, the problem of driving force degradation of the spring type injection device is solved. Through precise control of the coreless motor and compact structural design, the present invention greatly reduces the volume of the device compared with similar devices, and enables continuous hand-held operation. This invention uses a hollow cup motor to drive the ball screw and then passes through the coupling device, combined with the reassembly gap, to directly transmit the thrust to complete the injection. The absorption of the medicinal liquid is also realized by the same set of devices, which greatly reduces the complexity of the system and solves the problem of production and Problems include high maintenance costs and loud working noise.

Description

Continuous needleless injection device driven by hollow cup motor

Technical Field

The invention designs a continuous needleless injection device driven by a hollow cup motor, and belongs to the technical field of needleless injection.

Background

With the increase of daily protein intake of people, large animal breeding industry is developed, and a plurality of animal medicine liquid injection problems are encountered in the breeding industry development process, such as animal infection caused by traditional injection, food safety problems caused by broken needles left in animal bodies, too long traditional injection time during large-scale injection, personal safety problems caused by the stimulation of the needles on the animals during traditional injection, and the like, and the continuous needleless injection technology can perfectly solve the problems.

In the prior art, the mode of driving the propelling device to compress the liquid medicine by taking the compression potential energy of the spring as the driving force to complete the injection of the liquid medicine is common, but the driving force is difficult to adjust in the face of different use fields Jing Danhuang, the application range is narrow, the compression spring is long in time consumption and is not suitable for large-scale injection, on the other hand, the mechanical structure taking the spring as the driving force has higher system complexity, the operation of an injection system is possibly unstable after a plurality of times of use, the driving force is reduced in the reinjection process, and the liquid medicine cannot be completely injected. Another common driving method is electromagnetic force driving, but the needleless injection system using electromagnetic force as driving force needs to use complex electromagnetic components, and has high cost, and the continuous needleless injection system driven by electromagnetic force can generate large noise during operation, which may affect the working experience and injection efficiency of the injector.

Disclosure of Invention

In order to solve the existing problems of the above technology. The invention solves the problem of driving force decline of the spring type injection device by directly using the hollow cup motor for driving and by closed loop control output. The invention greatly reduces the volume of the device relative to the similar devices through the precise control and the compact structural design of the hollow cup motor, and can realize the handheld continuous operation. The invention adopts the hollow cup motor to drive the ball screw to pass through the coupling device and combine with the reloading gap, and directly transmits to the thrust to complete injection, and the medicine liquid suction is realized by the same device, thereby greatly reducing the complexity of the system, and solving the problems of high production and maintenance cost, large working noise and the like.

The system utilizes the characteristics of small volume and large torque of the hollow cup motor and the characteristics of high power density of the super capacitor, and can generate extremely fast impact speed to compress the liquid medicine to form high-speed jet flow by combining with the transmission of the ball screw. In the system, the rotating speed of the hollow cup is adjustable so as to adapt to different injection scenes, and the super capacitor can be charged by a high-performance power supply so as to meet the requirement of continuous large-scale injection work. The system has the advantages of simple structure, wide application range, simple control method, low cost and the like.

The invention provides a continuous needleless injection device driven by a hollow cup motor, which comprises: the housing 6, the injection device 1, the striking rod 2, the continuous drug inhalation device 3, further comprise: pushing in the pullback device 5;

the shell 6 is fixedly connected with a guide rod 7, a power device 9, a driving control system and a power supply system 10;

the power device 9 comprises a reduction gearbox 92 and a coreless motor 93;

the pushing and pulling device 5 comprises a coupling cylinder 52, a ball nut 53 and a screw rod 54, wherein the ball nut 53 and the screw rod 54 form a ball screw structure, and one end of the screw rod 54 is fixedly connected with the output end of the hollow cup motor 93; the coupling cylinder 52 is fixedly connected with the ball nut 53;

the injection device 1 is fixedly connected to the shell 6, the injection device 1 is columnar, a cylindrical cavity penetrating through the injection device 1 is arranged in the injection device 1, an injection hole 112 is formed in the left end of the injection device 1, and the right end of the injection device 1 is matched with the left end of the impact rod 2 to form a structure of a piston cylinder body matched with a piston; the right end of the striking rod 2 is connected with the coupling cylinder 52;

the driving control and power system 10 comprises a power module 101;

the power module 101 comprises a super capacitor, and the power module 101 is electrically connected to the power device 9

A first one-way valve 13 is arranged on the right side of the injection hole 112, and the injection hole 112 is communicated with the cylindrical cavity of the injection device 1 through the first one-way valve 13; when fluid is present in the cylindrical cavity, the first one-way valve 13 allows fluid in the cylindrical cavity to flow only from the cylindrical cavity to the injection hole 112.

Preferably, the striking rod 2 comprises a rod body 23, a disk 231 is arranged at the right end of the rod body 23, the diameter of the disk 231 is larger than the section diameter of the rod body 23,

the left end of the coupling cylinder 52 is provided with a speed increasing cavity 522, the left end of the speed increasing cavity 522 is provided with a through hole, the rod body 23 penetrates through the through hole on the speed increasing cavity 522, the disc 231 of the striking rod 2 is positioned in the speed increasing cavity 522, and the aperture of the through hole on the speed increasing cavity 522 is larger than the diameter of the section of the rod body 23 and smaller than the diameter of the disc 231; the lateral length of the acceleration chamber 522 is greater than the thickness of the disk 231.

Preferably, a pushing head 21 and a rubber ring 22 are arranged at the left end of the rod body 23 of the striking rod 2, an annular groove is arranged on the pushing head 21, and the rubber ring 22 is clamped on the annular groove, so that the inner wall of the cylindrical cavity of the injection device 1 is in contact with the rubber ring 22 of the striking rod 2 for sealing.

Preferably, the arrangement direction of the guide rod 7 is parallel to the axial direction of the cylindrical cavity of the injection device 1, a guide rod through hole is formed in the ball nut 53, the ball nut 53 is sleeved on the guide rod 7 through the guide rod through hole, so that the ball nut 53 moves along the arrangement direction of the guide rod 7 to drive the striking rod 2 to move along the arrangement direction of the guide rod 7 in the cylindrical cavity of the injection device 1;

the guide rod 7 is fixed on the housing 6 through two ends thereof, two ends of the guide rod 7 are provided with limiting parts, and the limiting parts are used for limiting the movement range of the pushing and pulling device 5 to be between two ends of the guide rod 7.

Preferably, the specific structure that one end of the screw 54 is fixedly connected to the output end of the hollow cup motor 93 includes: one end of the screw rod 54, which is far away from the ball nut 53, is connected to the hollow cup motor 93 through a coupler 55 and a reduction gearbox 92; the coupling cylinder 52 is fixedly connected with the ball nut 53.

Preferably, the continuous medicine sucking device 3 is composed of a second one-way valve 31, a cylinder 32, a hose 33 and a medicine sucking needle 34;

a seventh cavity 322 and an eighth cavity 324 are disposed in the cylinder 32, and the seventh cavity 322 and the eighth cavity 324 are connected through a second one-way valve 31, so that when there is fluid in the cylinder 32, the second one-way valve 31 can only enable the fluid to flow from the seventh cavity 322 to the eighth cavity 324;

the eighth cavity 324 is communicated with the cylindrical cavity of the injection device 1;

a hose connecting post 321 is arranged on the cylinder 32, the hose connecting post 321 is connected with one end of the hose 33, so that the space in the hose 33 is communicated with the seventh cavity 322, and the other end of the hose 33 is connected with the drug sucking needle 34;

the first check valve 13 and the second check valve 31 each comprise a spring, a sealing ball and a tight sealing ring, and the spring applies pressure to the sealing ball to enable the sealing ball to press the sealing ring.

Preferably, the power unit 9 further comprises an encoder 94;

the driving and controlling and power supply system 10 further comprises an instruction button group 102, an injection information display screen 103 and a motor driving and controlling board 104;

the command button group 102 is electrically connected with the motor drive control board 104 and is used for sending an operation command to the motor drive control board 104; the motor driving and controlling board 104 is electrically connected with the hollow cup motor 93 and is used for driving and controlling the hollow cup motor 93 to rotate and collecting current signals of the hollow cup motor 93;

the motor drive board 104 is connected with the encoder 94;

the encoder 94 is electrically connected with the hollow cup motor 93, and the encoder 94 is used for collecting motion information of the hollow cup motor 93 and sending the motion information to the motor drive and control board 104;

the injection information display screen 103 is electrically connected with the motor drive control board 104 and is used for displaying injection information;

the injection information includes: and detecting the condition of the air bubble.

Preferably, the injection device 1 further comprises an injection head 11, and the injection head 11 is disposed at the leftmost end of the injection device 1; the leftmost end of the injection head 11 is provided with the injection hole 112;

the contact surface between the injection head 11 and the animal body is a convex curved surface, and the structure of the curved surface is as follows: the curvature decreases near the injection hole 112 and increases away from the injection hole 112.

Preferably, the injection head 11 is detachably connected to the injection device 1.

The invention also provides a needleless injection method, which comprises the following steps:

use of a coreless motor driven continuous needleless injection device as in claim 8;

acquiring a container filled with a fluid medicine and connecting the continuous medicine sucking device 3 through the medicine sucking needle 34;

setting a dose amount using the instruction button group 102; the command button group 102 sends a signal to the coreless motor 93 through the motor drive control board 104 to control the coreless motor to rotate forward; the encoder 94 collects the motion information of the hollow cup motor 93, sends the motion information to a motor drive control board 104, and displays the motion information through the injection information display screen 103;

the hollow cup motor 93 drives the screw rod 54 to rotate positively, and the screw rod 54 drives the coupling cylinder 52 to move rightwards through the ball nut 53; driving the rod body 23 of the striking rod 2 to move rightward by a preset distance;

the second one-way valve 31 of the continuous medicine sucking device 3 is opened by the negative pressure caused by the rightward movement of the rod body 23, so that the fluid in the cylinder 32 enters the cylindrical cavity of the injection device 1, and the disc 231 stops at the left end of the speed increasing cavity 522;

attaching the injection head 11 to a liquid medicine receptor, and sending a firing signal by using the instruction button set 102; the command button group 102 sends a signal to the coreless motor 93 through the motor drive control board 104 to control the coreless motor to rotate reversely;

rapidly discharging the hollow cup motor 93 using the super capacitor;

the encoder 94 collects the motion information of the hollow cup motor 93, sends the motion information to a motor drive control board 104, and displays the motion information through the injection information display screen 103;

obtaining the relationship between the current magnitude of the hollow cup motor 93 and the air bubble content in the cylindrical cavity after calibration, setting an air bubble threshold, sampling the current of the hollow cup motor 93 during operation by using the motor drive control board 104 to monitor the air bubble condition in the cylindrical cavity of the injection device 1 during injection, and displaying a warning through the display screen 103 when the air bubble exceeds the set threshold;

the hollow cup motor 93 accelerates and rotates and drives the screw rod 54 to reversely accelerate and rotate, the screw rod 54 drives the coupling cylinder 52 to accelerate leftwards through the ball nut 53 until the right end of the accelerating cavity 522 impacts the disc 231 of the impact rod 2 at a high speed, so that the rod body 23 moves leftwards, and the fluid in the cylindrical cavity is pressurized instantly;

the pressurized fluid pushes the first check valve 13 open and is ejected at a high speed through the injection hole 112. Compared with the prior art, the invention has the beneficial effects that:

and (3) a step of: the brushless hollow cup motor and the super capacitor are combined to realize instant high-speed high-torque output, and the volume and the weight of the device are greatly reduced.

And II: through the design of the coupling structure, the motor can reach the maximum output and increase the injection force when in firing.

Thirdly,: closed-loop control of motor output can be realized through the control panel, and super capacitor output is stabilized, and super capacitor electric quantity supplement can also be completed in time.

Fourth, the method comprises the following steps: the injection information display screen is provided, so that the injection times, the injection dosage, the injection strength and the injection speed can be displayed in real time.

Drawings

In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of the overall structure of the present invention:

the invention comprises a 1-injection device, a 2-impact rod, a 3-continuous medicine sucking device, a 4-front fixing device, a 5-pushing and pulling device, a 6-shell, a 7-guide rod, an 8-rear fixing disc, a 9-power device and a 10-driving control and power supply system.

FIG. 2 is a schematic view of a 1-injection device:

as shown in fig. 2, the 1-injection device is composed of an injection head 11, an injection cylinder 12, and a first check valve 13. The injection head 11 is provided with a first cavity 111 and an injection hole 112, the injection head 11 is connected with the injection cylinder 12 through an internal thread 113, the two ends of the connection are sealed by sealing rings, and a spring on the first one-way valve 13 applies pressure to the sealing balls, so that the sealing balls press the sealing rings 131, and the second cavity 122 and the third cavity 121 are isolated. The syringe body 12 is provided with a fourth cavity 122, a fifth cavity 123 and a sixth cavity 125, which are in a communicated state, and the syringe body 12 is connected with the 3-continuous medicine sucking device through an inclined threaded hole 124 and is connected with the front fixing device 5 through a connecting boss 126.

The injection hole inner diameter can be replaced by replacing the injection head 11. When injection is performed on animals of different kinds and ages, the injection head 11 with a more appropriate aperture can be replaced by comprehensively considering the dosage and physical characteristics of the liquid medicine, so as to improve the injection efficiency.

The front end of the injection head 11 is a convex curved surface, the curvature of the injection hole is reduced near the injection hole, and the curvature of the injection hole is increased far away from the injection hole, so that the design is helpful for reducing stress reaction of animals during injection, compacting the skin of the injected part and improving the injection rate of the liquid medicine.

FIG. 3 is a schematic view of a 2-strike bar:

as shown in fig. 3, the 2-striking rod consists of a propelling head 21, a rubber ring 22 and a rod body 23. The tail part of the pushing head 21 is provided with a threaded hole, the head part of the rod body 23 is provided with a threaded column, and the pushing head and the rod body are connected through threads; the rubber ring 22 is clamped on the annular groove of the propulsion head 21 and is in close contact with the sixth cavity 125; the tail of the rod body 23 is provided with a disc 231, and when the disc 231 is pulled, the disc 231 is contacted with the second limit nut 51, and when the disc is impacted, the disc is contacted with the partition plate 523.

FIG. 4 is a schematic diagram of a 3-continuous drug delivery device:

as shown in fig. 4, the 3-continuous drug sucking device is composed of a second check valve 31, a cylinder 32, a hose 33, and a drug sucking needle 34. The spring on the second one-way valve 31 applies pressure to the sealing ball to press the sealing ring, isolating the seventh cavity 322 from the eighth cavity 324. The barrel 32 is connected to the syringe barrel 12 by external threads 323, and the eighth chamber 324 communicates with the fifth chamber 123. The hose connecting post 321 may be connected to the drug sucking needle 34 through the hose 33, and the drug sucking needle 34 may be inserted into the drug bottle so that the drug solution is introduced into the seventh cavity 322 through the drug sucking needle 34. By extending the length of the hose 33, the vial can be hung on the worker and separated from the device, thereby reducing the worker's arm load during operation.

FIG. 5 is a schematic view of a 4-front fixation device:

as shown in fig. 5, the 4-front fixation means consists of a first limit nut 41 and a flange 42. Wherein the first limit nut 41 is connected with the flange 42 through the internal thread 412, and then the connection boss 126 is clamped through the slot 411 generated by the connection between the two, thereby realizing the connection of the 1-injection device. The flange 42 is embedded in the first annular groove 61 of the housing 6, and the notch 423 is clamped on the first boss 63 in the first annular groove 61, so that the 4-front fixing device and the housing 6 are fixed. The flange 42 is provided with three evenly distributed through holes 421, so that the guide rod 7 passes through and is fixed.

Fig. 6 is a schematic diagram of a 5-push pull device:

as shown in fig. 6, the 5-push-pull device is composed of a second limit nut 51, a coupling cylinder 52, a ball nut 53, a screw rod 54, and a coupling 55. Wherein the second limit nut 51 is connected with the coupling cylinder 52 through threads 521 to form a speed increasing cavity 522, and the disk 231 is limited in the space. Six overlapping through holes are formed in the overlapping surface of the coupling cylinder 52 and the ball nut 53, three of which are connecting holes 531, bolts connect the coupling cylinder 52 and the ball nut 53, and the other three are guide rod through holes 525 and 532, so that the guide rod passes through. The ball nut 53 converts the rotational motion of the screw 54 into the linear motion thereof by the inner balls, and the screw 54 is accommodated in the ninth chamber 524 by the forward and backward motions of the ball nut. The screw 54 is connected to the reduction gearbox shaft 91 through a coupling 55.

Fig. 7 is a 6-housing schematic:

as shown in fig. 7, the housing 6 has a first annular groove 61 and a second annular groove 62 therein, and a first boss 63 and a second boss 64, respectively, are provided in the annular grooves. The 4-front fixture and the 8-rear fixture can be embedded within the housing without rotation.

FIG. 8 is a schematic view of a 7-guide bar:

as shown in fig. 8, the guide rod has threads 71 and 74 at both ends, and after the threads 71 pass through the through hole 421, the flange 42 is clamped by the nuts 72 and 73, so that one end of the guide rod is fixed to the flange 42. And the other end is the same, after the screw thread 74 passes through the through hole 81, the nut 75 and the nut 76 clamp the 8-rear fixing disc, so that the end of the guide rod is fixed on the 8-rear fixing disc, and finally the distance between the front fixing device and the rear fixing disc is determined.

FIG. 9 is a schematic view of an 8-rear fixed disk:

as shown in FIG. 9, on the 8-rear fixing plate, three uniformly distributed through holes 81 are formed on the outer side for fixing the 7-guide rod. Four evenly distributed through holes 82 are arranged near the center, and the 8-rear fixed disk is connected with the reduction gearbox 92 through screws. The intermediate through hole 83 is provided for passing through the output shaft 91 of the reduction gearbox. The notch 84 snaps over the second boss 64 to limit circumferential movement.

FIG. 10 is a schematic of a 9-power plant:

as shown in fig. 10, the 9-power device is composed of an output shaft 91, a reduction gearbox 92, a cup motor 93 and an encoder 94. The output shaft 91 is an extension shaft inside a reduction gearbox, the reduction gearbox 92 is matched with the inside of the hollow cup motor 93, and the encoder 94 is fixed on the rear side of the rear extension shaft of the hollow cup motor 93 through an aluminum alloy shell.

FIG. 11 is a schematic diagram of a 10-drive and power system:

as shown in fig. 11, the 10-drive and power system is composed of a power module 101, a command button set 102, an injection information display screen 103 and a motor drive board 104. The power module 101 is connected with the motor drive control board 104 to supply power to the system, and the motor drive control board 104 is connected with the injection information display screen 103 to update the injection information in real time. The command button group 102 is connected with the motor drive control board 104, sends out command signals, and the motor drive control board 104 is connected with the hollow cup motor 93 and the encoder 94 again, supplies power to the motor 93 and the encoder 94, controls the motor to rotate and reads feedback signals.

Fig. 12 is a schematic diagram of a power supply and control flow.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art in a specific case.

The brushless hollow cup motor is adopted, the structure is very simple, the structure is small, the weight is light, the rotor adopts an inner rotor structure and an outer rotor structure, and the interior of the rotor is hollow, so that the brushless hollow cup motor has lower inertia and magnetic resistance, can work under lower voltage, and has higher rotating speed and efficiency. The hollow cup motor adopts brushless motor design, and the rotor adopts inside and outside rotor structure for the noise is lower when the hollow cup motor operates. The brushless motor is designed, and no carbon brush is worn and rubbed, so that the brushless motor has long service life and high reliability. The hollow cup motor adopts a digital control technology, the control circuit is simple, a control algorithm is easy to realize, the torque is smooth, the reversing characteristic is good, and the load capacity is strong, so that the control with high precision, high efficiency and high reliability can be realized, and the hollow cup motor is widely used in the fields requiring precise control, such as the fields of unmanned aerial vehicle, aerospace, robot and the like. The characteristics of the hollow cup motor are very suitable for the field of needleless injection, and can meet the requirements of high propelling speed, continuous injection, jet speed control and the like during injection. In the needleless injection field, the reason why the hollow cup motor is not widely applied before may be that the traditional power supply system cannot meet the characteristics of small power supply volume and high power density required by needleless injection, so as to meet the requirement of the hollow cup motor. Aiming at the requirement, the invention provides a solution that the super capacitor supplies power to the hollow cup motor, the super capacitor has high power density, can release a large amount of electric energy in a short time, has higher energy density compared with the common capacitor, can store more charges, can meet the high power requirement of the hollow cup motor in a short time, and provides enough kinetic energy for the propulsion device. The super capacitor has high charging and discharging speed, can complete the charging and discharging process within a few seconds, and meets the requirement of rapidity of continuous needleless injection. Compared with the traditional battery, the super capacitor has longer service life, better environmental adaptability, difficult occurrence of dangerous situations such as thermal runaway, ignition and the like, higher safety, no pollutant in the super capacitor and better environmental protection performance.

The continuous needleless injection device driven by the hollow cup motor is specifically designed as follows:

a continuous needleless injection device driven by a hollow cup motor comprises an injection head which is arranged at the front end of an injection cylinder body through threaded connection; the drug suction valve is arranged above the injection cylinder body through threaded connection; the medicine bottle placing barrel is arranged on the medicine suction valve through threaded connection; the head of the injection push rod is provided with a rubber ring which is tightly matched with the inner wall of the injection cylinder body, can do reciprocating motion in the injection cylinder body, and the tail of the injection push rod is provided with a disc; the injection tube fixing sleeve is arranged on the front fixing disc through threaded connection and is used for jointly fixing the injection tube with the front fixing disc through an annular bulge at the rear part of the injection tube; the front fixed disc is embedded in the annular groove of the shell to realize axial fixation, radial protrusions in the radial groove and the shell groove on the disc are used for realizing circumferential fixation of the disc, three uniformly distributed through holes are formed in the disc and are used for installing guide rods, a through hole is formed in the middle of the disc and is used for enabling an injection push rod to pass through, and a groove is formed near the middle through hole and is used for installing a limiting gasket; the coupling retaining ring, the left end has the through-hole that is less than injection push rod afterbody disc diameter, and the right-hand member passes through threaded connection and installs on the coupling section of thick bamboo, constitutes the striking space with the middle part baffle before the coupling section of thick bamboo, can realize injection push rod afterbody disc and spacing relatively in this space, and at the during operation, the motor rotational speed reaches the biggest when striking space can be guaranteed, can improve the injection dynamics of push rod moreover. The coupling cylinder is connected with the ball nut through a bolt, and the screw rod is arranged in the coupling cylinder when the ball nut moves forwards and backwards; the ball nut realizes reciprocating motion on the screw rod through rotation of the screw rod, and the disc is provided with a through hole overlapped with the coupling cylinder and used for passing through the guide rod; the screw rod is connected with the speed reducer through a coupler; the speed reducer is connected with the rear positioning disk through screws, the rear positioning disk is fixed on the shell in the same way as the front positioning disk, and three through holes are uniformly distributed on the disk and are used for connecting the guide rod; the reduction gearbox is matched with the motor, and an encoder is arranged behind the motor; the motor driving and controlling board is arranged in the handle, connected with the power module, the control button, the motor and the encoder and used for controlling the motor movement mode; the power module consists of a super capacitor, a lithium battery and a power control board, and is connected with the motor drive control board to supply power to the whole device. The display screen is arranged on the shell and connected with the motor drive control board and used for displaying the injection times, the bubble detection condition, the battery allowance and the like; the control button is arranged on the handle and connected with the motor drive control board for inputting instructions.

The working principle of the invention is as follows:

before the injection starts, the instruction button set 102 can be combined with the injection information display screen 103 to select proper injection pressure, injection dosage and injection speed according to the property of the liquid medicine. After the setting is finished, the injection button in the command button group 102 is pressed to trigger the injection flow, the 10-drive control and power supply system starts to work, as shown in fig. 12, the power supply control board adjusts the output power of the super capacitor to supply power to the motor drive board 104, the motor drive board 104 outputs three-phase current to the hollow cup motor 93 according to an internal program, and receives feedback signals of the encoder 94 on the motor in real time to realize closed-loop control on the position, the speed and the moment of the hollow cup motor 93, the motor drive board 104 detects the real-time current through internal current sampling, the current reduction indicates the motor output power reduction, the motor load reduction is indicated, namely the blocked force of the motor is reduced, further indicates the internal pressure reduction of the second cavity 122, and the pressure reduction caused by the internal gas increase of the second cavity 122 can be obtained due to the strong gas compressibility. Through earlier-stage experiment calibration, the relation between the current and the bubble content can be obtained, at this time, the bubble content can be determined by sampling the current through the motor drive control board 104, and the bubble content is displayed on the display screen 103. According to different injection conditions and injected animals, the current when the gas content in the second cavity 122 does not meet the injection conditions is marked through experiments, and according to different set injection modes, the motor drive control board 104 judges whether the gas content in the second cavity 122 meets the injection requirements through the current detected through current sampling, if the gas content does not meet the injection requirements, a warning is sent out on the display screen 103, and at the moment, the drug re-inhalation can be realized by pressing a command button. When the electric quantity of the super capacitor is exhausted quickly, the power control board controls the traditional power supply to charge the super capacitor and stops charging timely, and the electric quantity of the power supply can be displayed on the display screen. The output of the cup motor 93 reaches the screw rod 54 through the reduction gearbox 92, the output shaft 91 and the coupling, and by the structure of the ball screw rod, the rotary motion of the screw rod 54 can be converted into the linear motion of the ball nut 53, and when the injection is started, the liquid medicine should be sucked first, and at this time, the screw rod 54 rotates forward to enable the ball nut 53 to move rightward, and because of the fixation of the guide rod 7, the circumferential motion of the ball nut 53 is limited. The ball nut 53 drives the coupling cylinder 52 to move rightwards, the disc 231 moves relatively in the accelerating cavity 522, after a certain distance, the head of the second limit nut 51 contacts the disc 231, the 2-impact rod is pulled out for a certain distance, at this time, the second one-way valve 31 is opened, the medicine liquid in the medicine bottle passes through the hose connecting post 321, and passes through the seventh cavity 322 and then passes through the eighth cavity 324, and then enters the fourth cavity 122 through the fifth cavity 123 on the injection cylinder 12, because the first one-way valve 13 is closed at this time, the medicine liquid continuously flows to the sixth cavity 125 under negative pressure, after the set injection dosage is reached, the hollow cup motor 93 stops rotating, and waits for the medicine liquid to be sucked, then the hollow cup motor 93 is reversed, and finally drives the coupling cylinder 52 to move leftwards, and because of the existence of the accelerating cavity 522, after a certain distance, the hollow cup motor 93 reaches the set rotating speed and the output torque, then the diaphragm 523 impacts with the disc 231, at this time, the output of the hollow cup motor 93 may change at this time, the set program closed-loop control makes the output of the hollow cup motor 93 adjust and stabilize in time, continuously push the 2-impact rod, the second one-way valve 31 is closed, the first one-way valve 21 is opened, the medicine liquid is finally pushed out from the fourth cavity 125, the first one-way valve 21 is pushed out from the fourth cavity 122, finally, the first one-way valve 21 is pushed into the first one-way valve 122, finally, the hollow cup motor 13 is pushed into the cavity 122, and finally, the hollow cup valve is opened, finally, and finally, the hollow cavity is pushed into the cavity through the fourth cavity 122, and finally, through the fourth cavity 21, and finally, through the one-way valve cavity and 21.

the second one-way valve 31 of the drug sucking device 3 is opened under the action of negative pressure caused by rightward movement of the rod body 23, so that the fluid in the drug storage cavity enters the cylindrical cavity of the injection device 1, and the disc 231 stops at the left end of the speed increasing cavity 522;

rapidly discharging the hollow cup motor 93 using the super capacitor;

the pressurized fluid pushes the first check valve 13 open and is ejected at a high speed through the injection hole 112.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", etc. may explicitly or implicitly include one or more such feature. In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.

Claims

1. A coreless motor-driven continuous needleless injection device comprising: housing (6), injection device (1), strike pole (2), continuous drug inhalation device (3), its characterized in that still includes: a push-pull device (5);

the shell (6) is fixedly connected with a guide rod (7), a power device (9), a driving control system and a power supply system (10);

the power device (9) comprises a reduction gearbox (92) and a hollow cup motor (93);

the pushing and pulling device (5) comprises a coupling cylinder (52), a ball nut (53) and a screw rod (54), wherein the ball nut (53) and the screw rod (54) form a ball screw structure, and one end of the screw rod (54) is fixedly connected with the output end of the hollow cup motor (93); the coupling cylinder (52) is fixedly connected with the ball nut (53);

the injection device (1) is fixedly connected to the shell (6), the injection device (1) is columnar, a cylindrical cavity penetrating through the injection device (1) is arranged inside the injection device (1), an injection hole (112) is formed in the left end of the injection device (1), and the right end of the injection device (1) is matched with the left end of the impact rod (2) to form a structure of a piston cylinder body matched with a piston; the right end of the striking rod (2) is connected with the coupling cylinder (52);

the driving and controlling and power supply system (10) comprises a power supply module (101);

the power module (101) comprises a super capacitor, and the power module (101) is electrically connected with the power device (9)

A first one-way valve (13) is arranged on the right side of the injection hole (112), and the injection hole (112) is communicated with a cylindrical cavity of the injection device (1) through the first one-way valve (13); the first one-way valve (13) allows fluid within the cylindrical cavity to flow only from the cylindrical cavity to the injection hole (112) when fluid is present within the cylindrical cavity.

2. A coreless motor-driven continuous needleless injection device as in claim 1, wherein,

the striking rod (2) comprises a rod body (23), the right end of the rod body (23) is provided with a disc (231), the diameter of the disc (231) is larger than the section diameter of the rod body (23),

the left end of the coupling cylinder (52) is provided with a speed increasing cavity (522), the left end of the speed increasing cavity (522) is provided with a through hole, the rod body (23) penetrates through the through hole on the speed increasing cavity (522), the disc (231) of the impact rod (2) is positioned in the speed increasing cavity (522), and the aperture of the through hole on the speed increasing cavity (522) is larger than the section diameter of the rod body (23) and smaller than the diameter of the disc (231); the accelerating cavities (522) have a lateral length greater than the thickness of the disk (231).

3. A coreless motor-driven continuous needleless injection device as in claim 2, wherein,

the left end of a rod body (23) of the impact rod (2) is provided with a pushing head (21) and a rubber ring (22), the pushing head (21) is provided with an annular groove, and the rubber ring (22) is clamped on the annular groove, so that the inner wall of the cylindrical cavity of the injection device (1) is in contact with the rubber ring (22) of the impact rod (2) for sealing.

4. A coreless motor-driven continuous needleless injection device as in claim 3, wherein,

the setting direction of the guide rod (7) is parallel to the axial direction of the cylindrical cavity of the injection device (1), a guide rod through hole is formed in the ball nut (53), the ball nut (53) is sleeved on the guide rod (7) through the guide rod through hole, and the ball nut (53) moves along the setting direction of the guide rod (7) so as to drive the impact rod (2) to move along the setting direction of the guide rod (7) in the cylindrical cavity of the injection device (1);

the guide rod (7) is fixed on the shell (6) through two ends of the guide rod, two ends of the guide rod (7) are provided with limiting parts, and the limiting parts are used for limiting the movement range of the pushing and pulling device (5) to be between the two ends of the guide rod (7).

5. A coreless motor-driven continuous needleless injection device as in claim 4, wherein,

the concrete structure of one end of lead screw (54) and the output fixed connection of hollow cup motor (93) includes: one end, far away from the ball nut (53), of the screw rod (54) is connected with the hollow cup motor (93) through a coupler (55) and a reduction gearbox (92); the coupling cylinder (52) is fixedly connected with the ball nut (53).

6. A coreless motor-driven continuous needleless injection device as in claim 5, wherein,

the continuous medicine sucking device (3) consists of a second one-way valve (31), a cylinder (32), a hose (33) and a medicine sucking needle (34);

a seventh cavity (322) and an eighth cavity (324) are arranged in the cylinder (32), the seventh cavity (322) and the eighth cavity (324) are connected through a second one-way valve (31), and when fluid exists in the cylinder (32), the second one-way valve (31) enables the fluid to flow from the seventh cavity (322) to the eighth cavity (324);

the eighth cavity (324) is communicated with the cylindrical cavity of the injection device (1);

a hose connecting post (321) is arranged on the cylinder body (32), the hose connecting post (321) is connected with one end of the hose (33) so that the space in the hose (33) is communicated with the seventh cavity (322), and the other end of the hose (33) is connected with the drug sucking needle (34);

the first check valve (13) and the second check valve (31) comprise springs, sealing balls and tight sealing rings, and the springs apply pressure to the sealing balls to enable the sealing balls to press the sealing rings.

7. A coreless motor-driven continuous needleless injection device as in claim 6, wherein,

the power plant (9) further comprises an encoder (94);

the driving control and power supply system (10) further comprises an instruction button group (102), an injection information display screen (103) and a motor driving control board (104);

the instruction button group (102) is electrically connected with the motor drive control board (104) and is used for sending an operation instruction to the motor drive control board (104); the motor driving and controlling board (104) is electrically connected with the hollow cup motor (93) and is used for driving and controlling the hollow cup motor (93) to rotate and collecting current signals of the hollow cup motor (93);

the motor drive control board (104) is connected with the encoder (94);

the encoder (94) is electrically connected with the hollow cup motor (93), and the encoder (94) is used for acquiring motion information of the hollow cup motor (93) and sending the motion information to the motor drive control board (104);

the injection information display screen (103) is electrically connected with the motor drive control board (104) and is used for displaying injection information;

8. A coreless motor-driven continuous needleless injection device as in claim 7, wherein,

the injection device (1) further comprises an injection head (11), and the injection head (11) is arranged at the leftmost end of the injection device (1); the leftmost end of the injection head (11) is provided with the injection hole (112);

the contact surface of the injection head (11) and the animal body is a convex curved surface, and the structure of the curved surface is as follows: the curvature decreases near the injection hole (112) and increases away from the injection hole (112).

9. A coreless motor-driven continuous needleless injection device as in claim 8, wherein,

the injection head (11) is detachably connected with the injection device (1).

10. A needleless injection method comprising the steps of:

-obtaining a container containing a fluid drug and being connected to said continuous drug inhalation device (3) by means of said drug inhalation needle (34);

setting a dose amount using the instruction button group (102); the instruction button group (102) sends a signal to the hollow cup motor (93) through the motor drive control board (104) to control the forward rotation of the hollow cup motor; the encoder (94) collects motion information of the hollow cup motor (93) and sends the motion information to the motor drive control board (104), and the motion information is displayed through the injection information display screen (103);

the hollow cup motor (93) drives the screw rod (54) to rotate forwards, and the screw rod (54) drives the coupling cylinder (52) to move rightwards through the ball nut (53); driving a rod body (23) of the striking rod (2) to move rightwards for a preset distance;

the second one-way valve (31) of the continuous medicine sucking device (3) is opened under the action of negative pressure caused by rightward movement of the rod body (23), so that fluid in the cylinder body (32) enters the cylindrical cavity of the injection device (1), and the disc (231) is stopped at the left end of the speed increasing cavity (522);

the injection head (11) is tightly attached to a liquid medicine receptor, and the instruction button group (102) is used for sending a firing signal; the instruction button group (102) sends a signal to the hollow cup motor (93) through the motor drive control board (104) to control the hollow cup motor to reversely rotate;

-rapidly discharging the hollow cup motor (93) using the supercapacitor;

the encoder (94) collects motion information of the hollow cup motor (93) and sends the motion information to the motor drive control board (104), and the motion information is displayed through the injection information display screen (103);

obtaining the relation between the current magnitude of the hollow cup motor (93) and the bubble content in the cylindrical cavity after calibration, setting a bubble threshold value, sampling the current of the hollow cup motor (93) during operation by using the motor drive control board (104) to monitor the bubble condition in the cylindrical cavity of the injection device (1) during injection, and displaying a warning through the display screen (103) when the bubble exceeds the set threshold value;

the hollow cup motor (93) accelerates and drives the screw rod (54) to reversely accelerate and rotate, the screw rod (54) drives the coupling cylinder (52) to accelerate leftwards through the ball nut (53) until the right end of the accelerating cavity (522) impacts the disc (231) of the impact rod (2) at a high speed, so that the rod body (23) moves leftwards, and fluid in the cylindrical cavity is pressurized instantly;

the pressurized fluid pushes the first check valve (13) open and is ejected at high speed through the injection hole (112).