WO2021128697A1 - 用于医用介入器械的快接型磁传动装置 - Google Patents

用于医用介入器械的快接型磁传动装置 Download PDF

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Publication number
WO2021128697A1
WO2021128697A1 PCT/CN2020/089426 CN2020089426W WO2021128697A1 WO 2021128697 A1 WO2021128697 A1 WO 2021128697A1 CN 2020089426 W CN2020089426 W CN 2020089426W WO 2021128697 A1 WO2021128697 A1 WO 2021128697A1
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WO
WIPO (PCT)
Prior art keywords
driven
quick
magnetic
magnetic transmission
coaxial
Prior art date
Application number
PCT/CN2020/089426
Other languages
English (en)
French (fr)
Inventor
郑淇文
陆栋梁
余波
Original Assignee
丰凯医疗器械（上海）有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 丰凯医疗器械（上海）有限公司 filed Critical 丰凯医疗器械（上海）有限公司
Priority to EP20905834.6A priority Critical patent/EP4084308A4/en
Priority to US17/789,021 priority patent/US11596784B1/en
Publication of WO2021128697A1 publication Critical patent/WO2021128697A1/zh

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M60/00—Blood pumps; Devices for mechanical circulatory actuation; Balloon pumps for circulatory assistance
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M60/00—Blood pumps; Devices for mechanical circulatory actuation; Balloon pumps for circulatory assistance
    • A61M60/10—Location thereof with respect to the patient's body
    • A61M60/122—Implantable pumps or pumping devices, i.e. the blood being pumped inside the patient's body
    • A61M60/126—Implantable pumps or pumping devices, i.e. the blood being pumped inside the patient's body implantable via, into, inside, in line, branching on, or around a blood vessel
    • A61M60/13—Implantable pumps or pumping devices, i.e. the blood being pumped inside the patient's body implantable via, into, inside, in line, branching on, or around a blood vessel by means of a catheter allowing explantation, e.g. catheter pumps temporarily introduced via the vascular system
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M60/00—Blood pumps; Devices for mechanical circulatory actuation; Balloon pumps for circulatory assistance
    • A61M60/10—Location thereof with respect to the patient's body
    • A61M60/122—Implantable pumps or pumping devices, i.e. the blood being pumped inside the patient's body
    • A61M60/126—Implantable pumps or pumping devices, i.e. the blood being pumped inside the patient's body implantable via, into, inside, in line, branching on, or around a blood vessel
    • A61M60/148—Implantable pumps or pumping devices, i.e. the blood being pumped inside the patient's body implantable via, into, inside, in line, branching on, or around a blood vessel in line with a blood vessel using resection or like techniques, e.g. permanent endovascular heart assist devices
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M60/00—Blood pumps; Devices for mechanical circulatory actuation; Balloon pumps for circulatory assistance
    • A61M60/20—Type thereof
    • A61M60/205—Non-positive displacement blood pumps
    • A61M60/216—Non-positive displacement blood pumps including a rotating member acting on the blood, e.g. impeller
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M60/00—Blood pumps; Devices for mechanical circulatory actuation; Balloon pumps for circulatory assistance
    • A61M60/20—Type thereof
    • A61M60/205—Non-positive displacement blood pumps
    • A61M60/216—Non-positive displacement blood pumps including a rotating member acting on the blood, e.g. impeller
    • A61M60/237—Non-positive displacement blood pumps including a rotating member acting on the blood, e.g. impeller the blood flow through the rotating member having mainly axial components, e.g. axial flow pumps
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M60/00—Blood pumps; Devices for mechanical circulatory actuation; Balloon pumps for circulatory assistance
    • A61M60/40—Details relating to driving
    • A61M60/403—Details relating to driving for non-positive displacement blood pumps
    • A61M60/408—Details relating to driving for non-positive displacement blood pumps the force acting on the blood contacting member being mechanical, e.g. transmitted by a shaft or cable
    • A61M60/411—Details relating to driving for non-positive displacement blood pumps the force acting on the blood contacting member being mechanical, e.g. transmitted by a shaft or cable generated by an electromotor
    • A61M60/414—Details relating to driving for non-positive displacement blood pumps the force acting on the blood contacting member being mechanical, e.g. transmitted by a shaft or cable generated by an electromotor transmitted by a rotating cable, e.g. for blood pumps mounted on a catheter
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M60/00—Blood pumps; Devices for mechanical circulatory actuation; Balloon pumps for circulatory assistance
    • A61M60/40—Details relating to driving
    • A61M60/403—Details relating to driving for non-positive displacement blood pumps
    • A61M60/419—Details relating to driving for non-positive displacement blood pumps the force acting on the blood contacting member being permanent magnetic, e.g. from a rotating magnetic coupling between driving and driven magnets
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M60/00—Blood pumps; Devices for mechanical circulatory actuation; Balloon pumps for circulatory assistance
    • A61M60/80—Constructional details other than related to driving
    • A61M60/855—Constructional details other than related to driving of implantable pumps or pumping devices
    • A61M60/857—Implantable blood tubes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/62—Means for facilitating engagement or disengagement of coupling parts or for holding them in engagement
    • H01R13/6205—Two-part coupling devices held in engagement by a magnet
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K49/00—Dynamo-electric clutches; Dynamo-electric brakes
    • H02K49/10—Dynamo-electric clutches; Dynamo-electric brakes of the permanent-magnet type
    • H02K49/104—Magnetic couplings consisting of only two coaxial rotary elements, i.e. the driving element and the driven element
    • H02K49/106—Magnetic couplings consisting of only two coaxial rotary elements, i.e. the driving element and the driven element with a radial air gap
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/02—General characteristics of the apparatus characterised by a particular materials
    • A61M2205/0272—Electro-active or magneto-active materials
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/82—Internal energy supply devices
    • A61M2205/8275—Mechanical
    • A61M2205/8287—Mechanical operated by an external magnetic or electromagnetic field

Definitions

  • the invention relates to a magnetic transmission device, in particular to a quick-connect type magnetic transmission device for medical interventional instruments.
  • the magnetic transmission device refers to a transmission technology that uses the coupling force generated by the magnetic materials installed on the driving end and the driven end of the transmission component to make the driving end drive the driven end to achieve power transmission.
  • the coupling force includes attraction and repulsion between magnetic materials.
  • Magnetic transmission is widely used because of its non-contact power transmission.
  • the main advantages of magnetic transmission include the absence of rigid connections between transmission parts, overload protection, simple structure and easy maintenance, and the ability to convert dynamic seals to static seals.
  • the main applications include vacuum, aerospace, medicine, food, scientific experiments, special chemical or High-risk areas.
  • transmission torque stability should be the main limitation in various applications.
  • high torque, high stability, long life and maintainability are the main improvements in magnetic transmission technology in recent years, especially for the distribution of magnetic materials in the two parts of the driving end and the driven end. A lot of structural improvements and inventions.
  • the torque transmission structure used to realize the interventional blood pump catheter device with the power source located outside the body, such as the artificial auxiliary blood pump device still needs improvement in the following aspects:
  • the technical problem to be solved by the present invention is to provide a quick-connect magnetic transmission device for medical interventional instruments, which can meet the application requirements of small-size micro-magnetic transmission structures on medical interventional instruments, and can realize high transmission speed and quick-connect operation .
  • the technical solution adopted by the present invention to solve the above-mentioned technical problems is to provide a quick-connect magnetic transmission device for medical interventional instruments, which includes a driving-side housing and a driven-side housing, the driving-side housing and the driven-side housing
  • the side shells are coaxially arranged and nested and connected, and sequentially include a magnetic coupling structure, a magnetic coupling coaxial guiding mechanism and an integral coaxial guiding mechanism from the inside to the outside; the magnetic coupling structure is composed of a magnetic drive active end and a magnetic drive driven end.
  • the magnetic coupling coaxial guide mechanism is composed of a magnetic coupling guide sleeve and a magnetic coupling guide groove;
  • the overall coaxial guide mechanism is composed of a coaxial guide sleeve, a coaxial guide groove and a coaxial locking structure Composition;
  • the magnetic drive driven end includes a driven rotor isolation sleeve, the coaxial guide groove is formed by the annular space between the inner wall of the driven side housing and the outer wall of the driven side inner housing, and the magnetic coupling guide groove is formed by the driven The space between the inner wall of the side inner shell and the outer wall of the driven rotor isolating sleeve is formed, the inner wall surface of the driven side inner casing is tightly matched with the outer wall surface of the magnetic coupling guide sleeve, and the active end of the magnetic transmission is arranged on the driven rotor isolating sleeve Between the outer wall surface of the magnetic coupling guide sleeve and the inner wall surface
  • the active end of the magnetic transmission is composed of an active rotor, an active rotor isolation sleeve and an active magnet;
  • the active rotor is a cylinder with a circular rotation space inside , The inner surface of the cylinder is provided with a groove;
  • the active rotor isolation sleeve is embedded in the circular rotating space, and forms a closed magnet placement groove together with the groove on the inner surface of the cylinder.
  • the magnet placement slots at the active end are in even-numbered pairs, and the magnets are placed in pairs facing each other. When they are expanded in the circumferential direction, the adjacent magnets have opposite levels.
  • the magnetic transmission driven end further includes a driven rotor, a driven magnet and a magnet holder, the driven rotor is a round shaft;
  • the magnet The holder is a slender cylinder with a circular assembly space inside and is assembled on the driven rotor;
  • the driven rotor isolation sleeve is a cylinder and is assembled on the magnet holder; a groove is formed on the surface of the magnet holder , And together with the driven rotor and the driven rotor isolation sleeve to form a magnet placement slot at the driven end.
  • the magnet placement slots at the driven end are of even-numbered pairs, and the magnets are placed in pairs facing each other. When expanded in the circumferential direction, the adjacent magnets have opposite levels.
  • the above-mentioned quick-connect magnetic transmission device for medical interventional instruments wherein the magnetic coupling coaxial guide mechanism and the overall coaxial guide mechanism adopt the same taper fit, and the length of the overall coaxial guide mechanism on the outer side is greater than the length of the magnetic coaxial guide mechanism on the inner side. Coupling the length of the coaxial guide mechanism.
  • the taper between the coaxial guide sleeve and the coaxial guide groove is 6:100.
  • the above-mentioned quick-connect magnetic transmission device for medical interventional instruments wherein the gap between the active end of the magnetic transmission and the driven end of the magnetic transmission is 0.3-0.5 mm, and the overall external surface of the quick-connect magnetic transmission device The diameter is 3.5cm ⁇ 4.0cm.
  • the quick-connect isolation sleeve is located between the active end of the magnetic transmission and the driven end of the magnetic transmission, and the magnetic transmission driven end on the left side of the quick-connect isolation is located in the catheter
  • the upper part belongs to the sterile area, and the active end of the magnetic drive on the right side is located in the non-sterile area on the power structure.
  • the quick-connect magnetic transmission device for medical interventional instruments provided by the present invention adopts the dual guidance of a magnetic coupling coaxial guiding mechanism and an integral coaxial guiding mechanism, which can be used in quick connection
  • the high degree of coaxiality is ensured in operation to meet the high-speed rotation requirements in clinical applications
  • the dual-guided lock-fit structure can ensure a very small transmission gap while realizing quick connection
  • the original dynamic seal of the transmission shaft is converted to active through magnetic transmission
  • the static seal between the end and the driven end on the one hand, completely avoids seal wear and reduces transmission resistance, on the other hand, makes the driven end completely sealed, thereby ensuring sterility in the catheter in clinical applications.
  • Figure 1 is a schematic structural diagram of a quick-connect magnetic transmission device for medical interventional instruments according to the present invention
  • Figure 2 is a schematic structural view of the front cross-sectional structure of the quick-connect magnetic transmission device of the present invention
  • FIG. 3 is a schematic diagram of the cross-sectional structure of the quick-connect magnetic transmission device of the present invention after connection;
  • FIG. 4 is an expanded schematic diagram of the structure of the active end of the magnetic transmission of the quick-connect magnetic transmission device of the present invention
  • Fig. 5 is an exploded view of the structure of the driven end of the magnetic transmission of the quick-connect magnetic transmission device of the present invention.
  • the quick-connect magnetic transmission device for medical interventional instruments includes a driving side housing and a driven side housing, the driving side housing and the driven side
  • the shells are coaxially arranged and nested and connected, and are divided into three levels: a magnetic coupling structure, a magnetic coupling coaxial guide mechanism and an integral coaxial guide mechanism from the inside to the outside according to functions.
  • the magnetic coupling structure is composed of the magnetic transmission active end 12, the magnetic transmission driven end 11 and the quick-connect isolation sleeve 13;
  • the magnetic coupling coaxial guide mechanism is composed of the magnetic coupling guide sleeve 21 and the magnetic coupling guide slot 22;
  • the overall coaxial guide The mechanism is composed of a coaxial guide sleeve 31, a coaxial guide groove 32 and a coaxial locking structure.
  • the magnetic transmission driven end 11 includes a driven rotor isolation sleeve 112, the coaxial guide groove 32 is formed by the annular space between the inner wall of the driven side housing 1 and the outer wall of the driven side inner housing 2, and the magnetic coupling guide groove 22 is formed by the space between the inner wall of the driven-side inner shell 2 and the outer wall of the driven rotor isolation sleeve 112.
  • the inner wall of the driven-side inner shell 2 is tightly matched with the outer wall of the magnetic coupling guide sleeve 21, and the magnetic drive drive
  • the end 12 is arranged between the outer wall surface of the driven rotor isolation sleeve 112 and the inner wall surface of the magnetic coupling guide sleeve 21.
  • the core difficulty of quick connection and high-speed rotation stability is to ensure the coaxiality of the docking.
  • the outer diameter of the quick-connect magnetic transmission device of the present invention is significantly reduced relative to the transmission structure, and the reduced outer diameter correspondingly reduces the connection strength.
  • the longer axial matching distance is compensated, thus further increasing the difficulty of coaxial.
  • the quick-connect type magnetic transmission device provided by the present invention adopts a double-guided locking fitting structure to provide sufficient connection strength to ensure coaxiality; after the quick-connect is inserted in place, a tight fit is formed between the guide sleeve and the guide groove.
  • the coaxial locking structure is a keyway provided on the driving side housing and the driven side housing and cooperating with each other.
  • a coaxial locking key 331 is formed at one end of the driven side housing 1, and a coaxial locking key 331 is formed at one end of the driving side housing 3.
  • Coaxial locking groove 332 Before use and insertion, the coaxial locking groove 332 is in the "open” position. After the coaxial locking key 331 is inserted in place, the coaxial locking groove 332 is adjusted to the "off" position to complete the locking.
  • a locking ring 333 can be further provided on the driven side housing 1.
  • the active end 12 of the magnetic transmission is composed of an active rotor 121, an active rotor isolation sleeve 122, and an active magnet 123.
  • the active rotor 121 is cylindrical with a circular rotating space inside, and there are grooves on the inner surface of the circular rotating space; the active rotor isolation sleeve 122 is embedded in the circular rotating space and forms a closed groove with the inner surface grooves.
  • the magnet is placed in the slot.
  • the magnet placement slots at the active end should be even-numbered pairs. When placing the magnets, they must be placed in pairs facing each other. When they are expanded in the circumferential direction, the adjacent magnets should have opposite levels.
  • the active rotor isolation sleeve 122 and the active rotor 121 are put into an integral injection molding process to achieve assembly to form a magnet accommodating cavity; after the active magnet 123 is placed in the magnet accommodating cavity, the glue port is sealed by medical-grade glue.
  • the other end of the active end 12 of the magnetic transmission is tightly connected with the drive motor, and the drive motor is fixed in the active side housing through a buffer structure.
  • the above assembly relationship belongs to a conventional assembly structure, and will not be repeated here.
  • the magnetic drive driven end 11 is composed of a driven rotor 111, a driven rotor isolation sleeve 112, a driven magnet 113 and a magnet holder 114.
  • the driven rotor 111 is a circular shaft
  • the magnet holder 114 is a slender cylinder with a circular assembly space inside and is assembled on the driven rotor 111
  • the driven rotor isolation sleeve 112 is a cylinder and is assembled on the magnet holder 114 On
  • the surface of the magnet holder 114 has a groove, and the driven rotor 111 and the driven rotor isolation sleeve 112 together form a magnet placement slot at the driven end.
  • the magnet placement slots at the driven end should be even-numbered pairs. When placing the magnets, they must be placed in pairs facing each other. When unfolding in the circumferential direction, the adjacent magnets should have opposite levels.
  • the other side of the driven end 11 of the magnetic drive is equipped with a support bearing (not shown), which is tightly fitted inside the driven side inner shell 2, and the driven side inner shell 2 is fixed to the driven side shell 1 through a buffer structure Inside.
  • the above assembly also belongs to the conventional assembly structure, and will not be repeated here.
  • the driven end 11 of the magnetic drive and the drive end 12 of the magnetic drive are separated by a quick-connect isolation sleeve 13.
  • the magnetic transmission driven end 11 on the left side of the quick-connect isolating sleeve 13 is located on the catheter and belongs to the sterilization area
  • the right magnetic transmission active end 12 is located on the power structure and belongs to the non-sterile area.
  • the magnetic coupling coaxial guide mechanism of the present invention cooperates with the overall coaxial guide mechanism to restrict the small rotation gap between the active end and the driven end on the inner and outer sides of the quick-connect isolating sleeve 13, and ensure that the two ends of the master-slave are identical after the quick-connect plugging and unplugging. Axial, and then achieve the requirements of high speed and stability. Since the gap between the active end 12 of the magnetic drive and the driven end 11 of the magnetic drive is only 0.3 ⁇ 0.5mm, the wall thickness of the quick-connect isolating sleeve 13 is about 0.3mm in the magnetic drive matching area; the bottom of the quick-connect isolating sleeve 13 and The bottom of the magnetic coupling coaxial guide mechanism is assembled and placed. In order to ensure the strength and coaxiality of the assembly part, the wall thickness of the quick-connect isolation sleeve 13 is thickened to 1.0mm at the assembly place.
  • the coaxial guide sleeve 31 and the coaxial guide groove 32 of the present invention adopt a 6% matching taper to achieve insertion guidance while improving the insertion position.
  • the two guide fitting structures are offset in the axial direction.
  • the outer overall coaxial guide fitting first contacts for overall coarse guide control, and the magnetic coupling coaxial guide fitting on the inner side continues to be inserted into contact for precise magnetic coupling structure. Oriented control.
  • the two guide fitting structures adopt the same taper and have a difference in length. Compared with the magnetic coupling coaxial guide mechanism, the overall coaxial guide mechanism on the outer side has a longer length.
  • the present invention is suitable for microstructure, high-speed, low-torque applications in medical interventional devices.
  • the overall outer diameter of the structure can be controlled within 4.0cm, and stable operation of the structure can be ensured at a maximum magnetic transmission speed of 50,000 RPM.
  • the invention first converts the original dynamic seal of the drive shaft into a static seal between the driving end and the driven end through magnetic transmission. On the one hand, it completely avoids seal wear and reduces the transmission resistance. On the other hand, it makes the driven end available. The complete sealing ensures the sterility of the catheter after sterilization in clinical application.
  • the present invention can ensure a very small transmission gap while realizing quick connection through a double-guided locking fitting structure.
  • the quick-connect magnetic transmission can meet the requirement that when medical catheters are used as consumables for a single use but the high-value power structure is the equipment and the equipment is expected to be used multiple times, one power active end can be used with different driven ends multiple times, saving At the same time, the power structure does not need to be sterilized and the reliability of the system is improved.
  • the guiding structure stably controls the rotation gap between the active and driven isolation within a very small 0.5mm gap. The lower control magnetic transmission gap provides sufficient torque in a small size structure.

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  • Health & Medical Sciences (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Engineering & Computer Science (AREA)
  • Cardiology (AREA)
  • Hematology (AREA)
  • Mechanical Engineering (AREA)
  • Anesthesiology (AREA)
  • Biomedical Technology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Vascular Medicine (AREA)
  • Power Engineering (AREA)
  • Dynamo-Electric Clutches, Dynamo-Electric Brakes (AREA)

Abstract

一种用于医用介入器械的快接型磁传动装置，包括主动侧壳体和从动侧壳体，主动侧壳体和从动侧壳体同轴设置并嵌套相连，由内至外依次包括磁耦合结构、磁耦合同轴导向机构和整体同轴导向机构；磁耦合结构由磁传动主动端(12)、磁传动从动端(11)和快接隔离套(13)构成；磁耦合同轴导向机构由磁耦合导向套(21)和磁耦合导向槽(22)构成；整体同轴导向机构由同轴导向套(31)、同轴导向槽(32)和同轴锁紧结构构成。用于医用介入器械的快接型磁传动装置，采用双重导向锁紧配合结构，实现快接的同时保证极小的传动间隙。

Description

用于医用介入器械的快接型磁传动装置 技术领域
本发明涉及一种磁传动装置，尤其涉及一种用于医用介入器械的快接型磁传动装置。
 背景技术
磁传动装置指利用传动部件中主动端和从动端上安装的磁性材料所产生的耦合力，使主动端带动从动端来实现动力传递的一种传动技术。其中的耦合力包括磁性材料间的引力和斥力。磁传动因其可实现非接触的动力传递而受到广泛应用。磁传动主要优势包括传动件间不存在刚性连接、可提供过载保护、结构简便易于维护、可将动密封转换为静密封等，主要应用包括真空、航天、医药、食品、科学实验、特殊化工或高危领域。
由于磁性材料技术的限制，传动扭矩稳定应是各种应用中的主要限制。同时由于传动应用多为大型工业环境，高扭矩、高稳定性、高寿命和维护性是近年来磁传动技术的主要改进方向，其中尤其针对主动端和从动端两部分的磁性材料布局分布出现了大量的结构改进和发明。
比如发明专利文献 “一种同轴式永磁传动装置”（CN 108880186A）中，提出了一种新的磁铁耦合布局结构。与传统同轴式磁传动结构相比，该专利通过采用通信筒体结构，增加磁铁耦合配对来提高磁传动所能提供的磁转矩。
又比如实用新型专利文献“一种磁传动机构”（CN 207907972U）中，提出一种磁传动结构在燃气密封领域的应用。通过磁传动替代传统密封结构，将静密封转换为动密封，实现降低传动阻力，提高结构稳定性的目的。
此外，发明专利文献“机电磁传动装置”（CN 109921558A）中，提出了一种新的主动端、从动端配合布局结构。与传动磁传动结构相比，该专利通过增加并行机构，使得一个主动端可同时带动多个从动端，实现提高系统的整体传动效率的目的。
 技术问题
与传统的磁传动结构相比，用于介入器械磁传动的关键技术需求在于临床应用时，更多的需求高转速而非高扭矩，同时相对于传动应用对规格的要求限制更高。因此，对用于实现动力源位于体外的介入式泵血导管装置中的扭矩传递结构，比如人工辅助泵血装置，仍有以下几个方面需要改进：
1）提供更小的磁传动结构规格，在采用微型磁体的同时依然可保持有效可满足临床应用的磁传动扭矩；2）可快接插拔的快接结构及更高的磁传动转速，满足临床应用中的高速转动需求；3）有效的磁铁封闭保证临床应用的生物相容性要求。
 技术解决方案
本发明所要解决的技术问题是提供一种用于医用介入器械的快接型磁传动装置，能够满足医用介入器械上小规格微型磁传动结构的应用需求，并可实现高传动转速和快接操作。
本发明为解决上述技术问题而采用的技术方案是提供一种用于医用介入器械的快接型磁传动装置，包括主动侧壳体和从动侧壳体，所述主动侧壳体和从动侧壳体同轴设置并嵌套相连，由内至外依次包括磁耦合结构、磁耦合同轴导向机构和整体同轴导向机构；所述磁耦合结构由磁传动主动端、磁传动从动端和快接隔离套构成；所述磁耦合同轴导向机构由磁耦合导向套和磁耦合导向槽构成；所述整体同轴导向机构由同轴导向套、同轴导向槽和同轴锁紧结构构成；所述磁传动从动端包括从动转子隔离套，所述同轴导向槽由从动侧外壳内壁与从动侧内壳外壁间的环形空间构成，所述磁耦合导向槽由从动侧内壳内壁与从动转子隔离套外壁间空间构成，所述从动侧内壳的内壁面与磁耦合导向套的外壁面紧配配合，所述磁传动主动端设于从动转子隔离套的外壁面与磁耦合导向套内壁面之间；所述同轴锁紧结构为设于主动侧壳体和从动侧壳体上且相互配合的键槽。
上述的用于医用介入器械的快接型磁传动装置，其中，所述磁传动主动端由主动转子、主动转子隔离套和主动磁体构成；所述主动转子为圆筒，内有圆形转动空间，所述圆筒的内表面设有凹槽；所述主动转子隔离套内嵌于圆形转动空间中，并与圆筒内表面凹槽共同构成封闭的磁铁放置槽。
上述的用于医用介入器械的快接型磁传动装置，其中，所述主动端的磁铁放置槽为偶数对，磁铁对向成对放入，依照圆周方向展开时，相邻磁铁级性相反。
上述的用于医用介入器械的快接型磁传动装置，其中，所述磁传动从动端还包括从动转子、从动磁体和磁体保持架，所述从动转子为圆轴；所述磁体保持架为细长圆筒，内有圆形装配空间，且装配于从动转子上；所述从动转子隔离套为圆筒，装配于磁体保持架上；所述磁体保持架表面形成有凹槽，并与从动转子和从动转子隔离套共同构成从动端的磁铁放置槽。
上述的用于医用介入器械的快接型磁传动装置，其中，所述从动端的磁铁放置槽为偶数对，磁铁对向成对放入，依照圆周方向展开时，相邻磁铁级性相反。
上述的用于医用介入器械的快接型磁传动装置，其中，所述同轴导向套和同轴导向槽采用锥度配合，所述从动侧外壳的内壁面与同轴导向套的外壁面紧配配合，所述从动侧内壳的外壁面与同轴导向套的内壁面间留有间隙。
上述的用于医用介入器械的快接型磁传动装置，其中，所述磁耦合同轴导向机构和整体同轴导向机构采用相同锥度配合且位于外侧的整体同轴导向机构长度大于位于内侧的磁耦合同轴导向机构的长度。
上述的用于医用介入器械的快接型磁传动装置，其中，所述同轴导向套和同轴导向槽之间的锥度为6：100。
上述的用于医用介入器械的快接型磁传动装置，其中，所述磁传动主动端和磁传动从动端之间的间隙为0.3～0.5mm，所述快接型磁传动装置的整体外径为3.5cm～4.0cm。
上述的用于医用介入器械的快接型磁传动装置，其中，所述快接隔离套位于磁传动主动端和磁传动从动端之间，快接隔离左侧的磁传动从动端位于导管上属于灭菌区域，右侧的磁传动主动端位于动力结构上属于非灭菌区域。
 有益效果
本发明对比现有技术有如下的有益效果：本发明提供的用于医用介入器械的快接型磁传动装置，采用磁耦合同轴导向机构和整体同轴导向机构的双重导向，可在快接操作中保证高度同轴，满足临床应用中的高速转动需求；双重导向锁紧配合结构，可在实现快接的同时保证极小的传动间隙；通过磁传动将原本传动轴的动密封转换为主动端和从动端两者之间的静密封，一方面完全避免了密封磨损并降低了传动阻力，另一方面使得从动端可以完全密封，从而在临床应用中可保证导管内无菌。
 附图说明
图1为本发明用于医用介入器械的快接型磁传动装置结构示意图；
图2为本发明的快接型磁传动装置连接前剖面结构示意图；
图3为本发明的快接型磁传动装置连接后剖面结构示意图；
图4为本发明的快接型磁传动装置的磁传动主动端结构展开示意图；
图5为本发明的快接型磁传动装置的磁传动从动端结构展开示意图。
 
图中：
1 从动侧外壳          2 从动侧内壳              3 主动侧外壳
11 磁传动从动端       12 磁传动主动端           13 快接隔离套
21 磁耦合导向套       22 磁耦合导向槽           31 同轴导向套
32 同轴导向槽         111 从动转子
112 从动转子隔离套    113 从动磁体             114 磁体保持架
121 主动转子          122 主动转子隔离套        123 主动磁体
331 同轴锁紧键        332 同轴锁紧槽            333 锁紧环。
 本发明的实施方式
下面结合附图和实施例对本发明作进一步的描述。
请参见图1、图2和图3，本发明提供的用于医用介入器械的快接型磁传动装置，包括主动侧壳体和从动侧壳体，所述主动侧壳体和从动侧壳体同轴设置并嵌套相连，由内至外根据功能划分为磁耦合结构、磁耦合同轴导向机构和整体同轴导向机构三个层次。其中，磁耦合结构由磁传动主动端12、磁传动从动端11和快接隔离套13构成；磁耦合同轴导向机构由磁耦合导向套21和磁耦合导向槽22构成；整体同轴导向机构由同轴导向套31、同轴导向槽32和同轴锁紧结构构成。所述磁传动从动端11包括从动转子隔离套112，所述同轴导向槽32由从动侧外壳1内壁与从动侧内壳2外壁间的环形空间构成，所述磁耦合导向槽22由从动侧内壳2内壁与从动转子隔离套112外壁间空间构成，所述从动侧内壳2的内壁面与磁耦合导向套21的外壁面紧配配合，所述磁传动主动端12设于从动转子隔离套112的外壁面与磁耦合导向套21内壁面之间。
快接并实现高速转动稳定性的核心难点在于保证对接的同轴度，此外，本发明的快接型磁传动装置结构外径上相对传动结构显著缩小，外径缩小相应导致连接强度下降，需要更长的轴向配合距离进行补偿，因此进一步增加同轴难度。为此，本发明提供的快接型磁传动装置采用双重导向锁紧配合结构提供足够的连接强度来保证同轴度；快接插入到位后，导向套和导向槽之间形成紧配配合。所述同轴锁紧结构为设于主动侧壳体和从动侧壳体上且相互配合的键槽，比如在从动侧外壳1一端形成同轴锁紧键331，在主动侧外壳3一端设置同轴锁紧槽332。使用插入前，同轴锁紧槽332处于“开”档位，同轴锁紧键331插入到位后，同轴锁紧槽332调至“关”档位即完成锁紧。此外，从动侧外壳1上还可进一步设置锁紧环333。
请继续参见图4，所述的磁传动主动端12由主动转子121、主动转子隔离套122、主动磁体123构成。其中的主动转子121为圆筒形，内有圆形转动空间，圆形转动空间的内表面存在凹槽；主动转子隔离套122内嵌于圆形转动空间中，与内表面凹槽共同构成封闭的磁铁放置槽。主动端的磁铁放置槽应为偶数对，磁铁放入时需对向成对放入，依照圆周方向展开时，相邻磁铁级性应相反。主动转子隔离套122与主动转子121加工过程中放入一体注塑实现装配，构成磁体容纳腔；主动磁体123放入磁体容纳腔后，通过医用级胶水封闭胶口。磁传动主动端12的另一端与驱动电机紧配连接，驱动电机通过缓冲结构固定于主动侧壳体内，以上装配关系属于常规装配结构，在此不在展开赘述。
请继续参见图5，所述的磁传动从动端11由从动转子111、从动转子隔离套112、从动磁体113和磁体保持架114构成。其中从动转子111为圆轴，磁体保持架114为细长圆筒形，内有圆形装配空间，装配于从动转子111上；从动转子隔离套112为圆筒，装配于磁体保持架114上；磁体保持架114表面具有凹槽，与从动转子111和从动转子隔离套112共同构成从动端的磁铁放置槽。从动端的磁铁放置槽应为偶数对，磁铁放入时需对向成对放入，依照圆周方向展开时，相邻磁铁级性应相反。磁传动从动端11另一侧装配有支撑轴承（图未示），支撑轴承紧配装配于从动侧内壳2的内部，从动侧内壳2通过缓冲结构固定于从动侧外壳1内。以上装配同样属于常规装配结构，在此不在展开赘述。
本发明的磁耦合结构中，磁传动从动端11和磁传动主动端12之间由快接隔离套13隔开。传动结构应用在介入导管中时，快接隔离套13左侧的磁传动从动端11位于导管上属于灭菌区域，右侧的磁传动主动端12位于动力结构上属于非灭菌区域。
本发明的磁耦合同轴导向机构和整体同轴导向机构配合，约束快接隔离套13内外两侧主动端和从动端间的微小转动间隙，保证在快接插拔后主从两端的同轴性，进而实现高转速及稳定性的要求。由于磁传动主动端12和磁传动从动端11之间的间隙仅为0.3～0.5mm，在磁传动配合区域，快接隔离套13的壁厚约为0.3mm；快接隔离套13底部与磁耦合同轴导向机构底部装配放置，为保证装配部分强度及同轴度，在装配处快接隔离套13壁厚加厚至1.0mm。
为了实现更短的轴向配合距离获得更大的连接强度，更进一步地，本发明的同轴导向套31和同轴导向槽32间采用6%配合锥度，实现插入导向的同时提高插入到位后的配合强度。两处导向配合结构在轴向存在偏移，快接插入时外侧的整体同轴导向配合首先接触进行整体的粗导向控制，继续插入内侧的磁耦合同轴导向配合开始接触进行磁耦合结构的精密导向控制。进一步的，两处导向配合结构在采用相同锥度的同时存在长度差；相对于磁耦合同轴导向机构，位于外侧的整体同轴导向机构长度更长，插入操作时由于内外两侧结构存在轴向偏移使得插入阻力呈非线性上升，实现磁耦合同轴导向接触前插入阻力较低，接触后插入阻力迅速上升进而可在保证最终配合强度的同时避免较高的快插使用难度。
相对于传统工业中的磁传动结构，本发明适用于医用介入器械中的微小结构、高转速、低扭矩类应用。采用本发明的磁传动架构，实现可快接适配操作的同时，结构的整体外径可控制在4.0cm以内，并可在最大50000RPM的磁传动转速下保证结构运行稳定。
本发明首先通过磁传动将原本传动轴的动密封转换为主动端和从动端两者之间的静密封，一方面完全避免了密封磨损并降低了传动阻力，另一方面使得从动端可以完全密封使得临床应用时灭菌后可保证导管内无菌。
进一步的本发明通过双重导向锁紧配合结构，可在实现快接的同时保证极小的传动间隙。一方面，快接型磁传动可满足在医用导管作为耗材单次使用但高值动力结构为设备希望多次使用情况下，一个动力主动端可多次配合不同的从动端使用的需求，节约使用成本的同时因动力结构无需再进行灭菌操作同时提升了系统的可靠性；另一方面，导向结构将主动和从动隔离间的转动间隙稳定控制在极微小的0.5mm间隙内，通过实现更低的控制磁传动间隙在小规格结构中提供足够的扭矩。
虽然本发明已以较佳实施例揭示如上，然其并非用以限定本发明，任何本领域技术人员，在不脱离本发明的精神和范围内，当可作些许的修改和完善，因此本发明的保护范围当以权利要求书所界定的为准。

Claims (10)

  1. 一种用于医用介入器械的快接型磁传动装置，包括主动侧壳体和从动侧壳体，所述从动侧壳体包括从动侧外壳与从动侧内壳，其特征在于，所述主动侧壳体和从动侧壳体同轴设置并嵌套相连，所述快接型磁传动装置由内至外依次包括磁耦合结构、磁耦合同轴导向机构和整体同轴导向机构；所述磁耦合结构由磁传动主动端、磁传动从动端和快接隔离套构成；所述磁耦合同轴导向机构由磁耦合导向套和磁耦合导向槽构成；所述整体同轴导向机构由同轴导向套、同轴导向槽和同轴锁紧结构构成；
    所述磁传动从动端包括从动转子隔离套，所述同轴导向槽由从动侧外壳内壁与从动侧内壳外壁间的环形空间构成，所述磁耦合导向槽由从动侧内壳内壁与从动转子隔离套外壁间空间构成，所述从动侧内壳的内壁面与磁耦合导向套的外壁面紧配配合，所述磁传动主动端设于从动转子隔离套的外壁面与磁耦合导向套内壁面之间；
    所述同轴锁紧结构为设于主动侧壳体和从动侧壳体上且相互配合的键槽。
  2. 如权利要求1所述的用于医用介入器械的快接型磁传动装置，其特征在于，所述磁传动主动端由主动转子、主动转子隔离套和主动磁体构成；所述主动转子为圆筒，内有圆形转动空间，所述圆筒的内表面设有凹槽；所述主动转子隔离套内嵌于圆形转动空间中，并与圆筒内表面凹槽共同构成封闭的磁铁放置槽。
  3. 如权利要求2所述的用于医用介入器械的快接型磁传动装置，其特征在于，所述磁传动主动端的磁铁放置槽为偶数对，磁铁对向成对放入，依照圆周方向展开时，相邻磁铁极性相反。
  4. 如权利要求1所述的用于医用介入器械的快接型磁传动装置，其特征在于，所述磁传动从动端还包括从动转子、从动磁体和磁体保持架，所述从动转子为圆轴；所述磁体保持架为细长圆筒，内有圆形装配空间，且装配于从动转子上；所述从动转子隔离套为圆筒，装配于磁体保持架上；所述磁体保持架表面形成有凹槽，并与从动转子和从动转子隔离套共同构成从动端的磁铁放置槽。
  5. 如权利要求4所述的用于医用介入器械的快接型磁传动装置，其特征在于，所述从动端的磁铁放置槽为偶数对，磁铁对向成对放入，依照圆周方向展开时，相邻磁铁极性相反。
  6. 如权利要求1所述的用于医用介入器械的快接型磁传动装置，其特征在于，所述同轴导向套和同轴导向槽采用锥度配合，所述从动侧外壳的内壁面与同轴导向套的外壁面紧配配合，所述从动侧内壳的外壁面与同轴导向套的内壁面间留有间隙。
  7. 如权利要求6所述的用于医用介入器械的快接型磁传动装置，其特征在于，所述磁耦合同轴导向机构和整体同轴导向机构采用相同锥度配合且位于外侧的整体同轴导向机构长度大于位于内侧的磁耦合同轴导向机构的长度。
  8. 如权利要求6所述的用于医用介入器械的快接型磁传动装置，其特征在于，所述同轴导向套和同轴导向槽之间的锥度为6：100。
  9. 如权利要求1所述的用于医用介入器械的快接型磁传动装置，其特征在于，所述磁传动主动端和磁传动从动端之间的间隙为0.3～0.5mm，所述快接型磁传动装置的整体外径为3.5cm～4.0cm。
  10. 如权利要求1所述的用于医用介入器械的快接型磁传动装置，其特征在于，所述快接隔离套位于磁传动主动端和磁传动从动端之间，快接隔离套左侧的磁传动从动端位于导管上属于灭菌区域，右侧的磁传动主动端位于动力结构上属于非灭菌区域。
PCT/CN2020/089426 2019-12-24 2020-05-09 用于医用介入器械的快接型磁传动装置 WO2021128697A1 (zh)

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