Motor Rotor Magnet Scattering Prevention via Flange Adhesion
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Solution Overview
Problem
Existing pump devices with motors face challenges in preventing magnet scattering without dedicated members, leading to increased component counts and manufacturing costs.
Innovation Solution
A rotor design featuring a magnet with recessed parts on its end face, where the holding member's flange portion covers and adheres to these parts, serving as a scattering prevention mechanism, reducing the need for additional components and enhancing magnet retention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a dedicated scattering prevention member is attached to the magnet, then magnet scattering is prevented, but the number of components increases and manufacturing costs increase
Solution Approach 1:
The holding member is designed to integrate multiple functions: it holds the magnet in position and simultaneously acts as a scattering prevention member. The flange portion of the holding member covers the magnet's end face and is adhered to the magnet, preventing magnet fragments from scattering while eliminating the need for a separate scattering prevention component.
Solution Approach 2:
The holding member serves dual purposes: it performs the primary function of holding the magnet to the rotation shaft, and it also provides scattering prevention functionality through its flange portion that covers the magnet's end face. This multi-functional design reduces the total component count while maintaining reliability.
2Reliability
If a dedicated scattering prevention member is attached to the magnet, then magnet scattering is prevented, but manufacturing costs increase
Solution Approach 1:
By combining the scattering prevention function into the existing holding member, the patent eliminates the need for additional parts and assembly steps. This integration reduces manufacturing complexity and cost while ensuring magnet scattering prevention.
Solution Approach 2:
The holding member is designed as a multi-functional component that simultaneously provides magnet retention and scattering prevention. This approach reduces the total bill of materials and assembly operations, thereby lowering manufacturing costs while maintaining reliability.
3Object-affected harmful factors
If the magnet is broken, then magnet fragments may scatter causing harm, but adding a dedicated prevention member increases device complexity
Solution Approach 1:
The holding member's flange portion is designed to cover the magnet's end face and function as a scattering prevention barrier. This integrated design prevents magnet fragments from scattering while avoiding the addition of separate prevention components, thus reducing device complexity.
Solution Approach 2:
The flange portion of the holding member acts as an intermediary structure that physically blocks magnet fragments from scattering. This mediator approach prevents harmful effects without requiring additional dedicated prevention members, maintaining simplicity in the overall design.
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
This design effectively prevents magnet scattering, reduces component count, and lowers manufacturing costs by integrating the holding member as a scattering prevention mechanism, while maintaining magnet integrity and ensuring rotor functionality.
Implementation Method 1
the flange portion is adhered to the surfaces of the recessed parts
Data Source
AI summary
A rotor may include a rotation shaft, a magnet on an outer peripheral side, a holding member holding the rotation shaft and the magnet, and a plurality of recessed parts provided in an end face of the magnet in an axial line direction of the rotation shaft so as to be separated from each other in a circumferential direction. A surface of each of the recessed parts is formed in a spherical shape, the holding member has a flange portion which covers the end face of the magnet from an end on an inner peripheral side of the end face of the magnet to an outer peripheral side with respect to the plurality of the recessed parts, and the flange portion is adhered to the surfaces of the recessed parts.