Switchable Magnetic Coupling With Rotating Magnet State Sensing
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Solution Overview
Problem
Magnetic coupling devices with multiple workpiece contact interfaces face challenges in efficiently coupling to ferromagnetic workpieces due to limitations in switchable magnetic flux sources and sensor integration, which affect the device's operational states and magnetic field strength.
Innovation Solution
A magnetic coupling device with a switchable magnetic flux source comprising multiple permanent magnets, including a first and second permanent magnet movable relative to each other, and multiple workpiece engagement surfaces, where the second permanent magnet is rotatable to vary the magnetic field strength, and sensors are positioned to monitor and control the magnetic flux, enabling precise coupling and state determination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a switchable magnetic flux source with multiple permanent magnets is used, then the magnetic coupling strength can be varied, but the device complexity increases
Solution Approach 1:
The magnetic coupling device is divided into multiple independent permanent magnets (first permanent magnet, second permanent magnet) that can be independently positioned and controlled. Each magnet contributes to the overall magnetic flux, allowing granular control of magnetic coupling strength by activating or deactivating individual magnets or adjusting their positions relative to the workpiece engagement surfaces.
Solution Approach 2:
The second permanent magnet is made movable relative to the first permanent magnet, enabling dynamic adjustment of the magnetic field configuration. This mobility allows the device to transition between different operational states (coupled and uncoupled) and adjust magnetic field strength by changing the spatial relationship between magnets and pole portions during operation.
2Reliability
If multiple workpiece engagement surfaces are provided, then the coupling reliability improves, but the manufacturing complexity increases
Solution Approach 1:
The pole portions are segmented into multiple discrete engagement surfaces (first north pole portion, second north pole portion, first south pole portion, second south pole portion) with distinct workpiece engagement surfaces. Each pole portion can be independently manufactured and positioned, allowing modular assembly and simplified manufacturing of complex multi-surface configurations compared to creating a single integrated pole structure.
Solution Approach 2:
Multiple workpiece engagement surfaces are provided across different pole portions, where each surface can independently contact the workpiece. This multi-functionality ensures that if one engagement surface is compromised or misaligned, other surfaces can maintain the magnetic coupling, thereby improving overall reliability without requiring each individual surface to be perfectly manufactured.
3Measurement precision
If sensors are integrated into the device, then the measurement precision of operational state improves, but the device complexity increases
Solution Approach 1:
Sensors are integrated directly into the pole portions or housing structure, merging the sensing function with the existing magnetic coupling components. This integration allows operational state detection (coupled/uncoupled status) to be achieved using the same structural elements that provide magnetic engagement, rather than adding completely separate sensing systems, thereby improving measurement precision while minimizing the increase in overall device complexity.
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 efficient and variable magnetic coupling to ferromagnetic workpieces by adjusting the magnetic field strength and monitoring the operational state, enhancing its versatility and reliability.
Implementation Method 1
a switchable magnetic flux source supported by the housing, the switchable magnetic flux source being switchable between at least an OFF state and an ON state
Implementation Method 2
the switchable magnetic flux source includes a plurality of permanent magnets
Implementation Method 3
magnetic coupling to a ferromagnetic workpiece
Data Source
AI summary
Magnetic coupling devices are disclosed. The magnetic coupling devices may include sensors, retractable pins, stationary pins, probes, and/or additional tools. The magnetic coupling devices may include multiple sets of pole portions, a first set may be received in an opening in a first magnet of the magnetic coupling device and a second set may be outside of an envelope of the first magnet.