Magnetic Rotary Coupling for Separable Shaft Orientation Alignment
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Solution Overview
Problem
Existing coupling systems fail to transmit angular motion from a rotating driving element to a passive driven element while allowing complete separation and deriving the orientation of the driven element from the driving element, especially in applications requiring movement of the driven element away from the driving element.
Innovation Solution
A magnetic coupling system where a driving element with a first magnetic element and a driven element with a second magnetic element are configured to align their axes, allowing magnetic interaction to couple rotational motion, with the ability to separate completely and derive the driven element's orientation from the driving element's orientation, using permanent or electromagnets and ferromagnetic materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If clutch systems are used to engage and disengage driving and driven shafts, then the driven shaft can be selectively engaged and disengaged from the driving shaft, but the axes of the passive and driving elements cannot be moved out of alignment and there is no necessary relationship between their rotational orientations
Solution Approach 1:
The patent replaces traditional mechanical clutch systems with a magnetic coupling system. The driving element includes a driving magnet and the driven element includes a driven magnet, which magnetically couple to transmit rotational motion. This substitution allows the driven element to be moved away from the driving element along the track while maintaining rotational coupling, eliminating the need for fixed axial positioning and mechanical engagement mechanisms.
2Measurement precision
If geared systems or magnetic shaft couplings are used to align driving and driven elements, then alignment is achieved, but there is no unique engaged position so the orientation of the driven system cannot be derived from the driving system
Solution Approach 1:
The patent employs asymmetric magnetic pole arrangements on the driving and driven elements. The driving element has a specific magnetic pole configuration that creates a unique magnetic field pattern, and the driven element has a corresponding asymmetric arrangement. This asymmetry ensures that there is only one unique engaged position where the magnetic fields properly align, establishing a deterministic orientational relationship between the driving and driven systems that allows the driven orientation to be derived from the driving orientation.
3Adaptability or versatility
If the driven element is moved away from the driving element along a track, then versatility of positioning is achieved, but existing coupling systems cannot maintain rotational coupling at varying positions
Solution Approach 1:
The magnetic coupling system replaces mechanical transmission mechanisms with magnetic field-based coupling. The driving magnet and driven magnet create a magnetic field that transmits rotational motion without requiring physical contact or fixed positioning. This allows the driven element to be moved to various positions along the track while maintaining reliable rotational coupling through the magnetic field, which extends over distance and does not require precise mechanical alignment like traditional systems.
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
Enables reliable and efficient transmission of rotational motion between the driving and driven elements, allowing for precise control and synchronization while maintaining the ability to disengage, thus overcoming limitations of existing systems.
Implementation Method 1
a magnetic interaction between the first magnetic element and the second magnetic element couples the rotational motion of the driving element and the rotational motion of the driven element
Data Source
AI summary
A system for transmitting rotational motion between a driving element and a driven element comprises a driving element that is coupled to a torque input that causes the driving element to rotate about a drive axis. The driving element comprises a first magnetic element. A driven element is configured to rotate about a driven axis. The driven element comprises a second magnetic element. Both the first magnetic element and second magnetic element are susceptible to a magnetic field, and at least one of the first and second magnetic element produces a magnetic field. A magnetic interaction between the first magnetic element and the second magnetic element couples the rotational motion of the driving element and the rotational motion of the driven element. The driving and driven elements are coupled at a predetermined rotational orientation with respect to each other.