Magnetic Coupling Assembly With Double-Guided Quick Coaxial Locking
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Solution Overview
Problem
Current magnetic transmission devices for medical interventional instruments face challenges in achieving high rotation speed and quick-connection operations while maintaining effective torque transfer and biocompatibility, especially in miniature designs for clinical applications.
Innovation Solution
A quick-connect type magnetic transmission device with a coaxial guide mechanism and integral coaxial guide mechanism, featuring a magnetic coupling structure with a double-guide lock-fit, ensures high coaxiality and minimal transmission gap, converting dynamic seals to static seals for sterility and reducing wear and resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a conventional magnetic transmission structure is used, then the structure is simple and easy to maintain, but the rotation speed is limited and connection time is long
Solution Approach 1:
The magnetic transmission device is divided into modular components including driving end, driven end, and intermediate housing that can be quickly assembled and disassembled. This segmentation enables fast connection while maintaining simple individual components.
Solution Approach 2:
The intermediate housing is nested within the driven housing, and the driving end components are nested within the intermediate housing. This nested structure reduces overall device size and complexity while enabling quick connection through standardized interfaces.
2Volume of moving object
If miniature magnets are used to reduce structure specification, then the device size is reduced, but the magnetic transmission torque may be insufficient
Solution Approach 1:
The intermediate housing contains localized magnetic elements that concentrate magnetic flux in specific regions. This local quality enhancement ensures sufficient magnetic transmission torque is generated despite the overall miniature size of the device.
Solution Approach 2:
The device uses composite magnetic structures combining different magnetic materials with varying coercivity and remanence properties. This allows optimization of torque output while maintaining compact dimensions suitable for medical interventional instruments.
3Reliability
If dynamic seal is used in traditional transmission, then power can be transmitted through rotating shaft, but wear and resistance increase and sterility cannot be ensured
Solution Approach 1:
The patent replaces the traditional mechanical dynamic seal with a magnetic coupling transmission system. The magnetic field transmits torque across the interface without physical contact, eliminating wear and ensuring sterility while maintaining power transmission capability.
4Loss of time
If quick-connection structure is implemented, then connection time is reduced, but coaxiality alignment may be difficult to achieve
Solution Approach 1:
The intermediate housing pre-establishes the coaxial alignment path before the final connection is made. Guide features and alignment pins are built into the housing structure to automatically ensure coaxiality during the quick-connection process, eliminating the need for complex alignment procedures.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The device achieves high-speed rotation stability and quick connection with minimal transmission gap, ensuring sterility and reducing wear, while maintaining effective torque transfer in a compact design suitable for clinical applications.
Implementation Method 1
a driving end drives a driven end to realize power transmission by using a coupling force generated by a magnetic material installed on the driving end and the driven end in a transmission component. The coupling forces include attractive and repulsive forces between the magnetic materials
Data Source
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AI summary
The present invention discloses a quick-connect type magnetic transmission device for a medical interventional instrument, comprising a driving-side housing and a driven-side housing, wherein the driving-side housing and the driven-side housing are coaxially arranged and nested and connected, and the quick-connection type magnetic transmission device comprises a magnetic coupling structure, a magnetic coupling coaxial guide mechanism and an integral coaxial guide mechanism successively from inside to outside; the magnetic coupling structure is composed of a magnetic transmission driving end, a magnetic transmission driven end and a quick-connect spacing sleeve; the magnetic coupling coaxial guide mechanism is composed of a magnetic coupling guide sleeve and a magnetic coupling guide groove; and the integral coaxial guide mechanism is composed of a coaxial guide sleeve, a coaxial guide groove and a coaxial locking structure. The present invention provides a quick-connect type magnetic transmission device for a medical interventional instrument, which employs a double-guided locking fit structure to achieve quick connection while ensuring a minimal transmission gap.