Rotor Assembly Device Preventing Magnet Collision with Pressure Plates
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Solution Overview
Problem
Existing assembly devices for equipping rotor units of electric motors with magnetic elements risk damaging spring-like pressure plates when inserting magnetic elements into receiving nests, as they lack mechanisms to prevent collision and ensure safe positioning.
Innovation Solution
An assembly device with a coaxial alignment arrangement of two rotating ring elements, featuring radially directed and circumferentially aligned contact surfaces on receiving shafts, allows for controlled positioning of magnetic elements without colliding with pressure plates, enabling safe transfer and defined force application using spring-loaded slide elements and stop elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If magnetic elements are inserted directly into receiving nests using conventional assembly devices, then the assembly process is simple and fast, but the spring-like pressure plates in the receiving nests may be damaged due to collision during insertion
Solution Approach 1:
The patent applies preliminary action by positioning the magnetic elements in a predefined alignment arrangement with receiving shafts before insertion into the receiving nests. The alignment arrangement pre-positions multiple magnetic elements with correct orientation and spacing, allowing controlled insertion that prevents collision damage to the pressure plates while maintaining assembly efficiency
Solution Approach 2:
The alignment arrangement acts as an intermediary device between the magnetic elements and the receiving nests. It provides a protective interface that guides the magnetic elements during insertion, preventing direct collision with the pressure plates while ensuring proper positioning in the receiving nests
2Reliability
If special protective measures are implemented to prevent damage to pressure plates during magnetic element insertion, then the pressure plates are protected, but the assembly process becomes more complex and time-consuming
Solution Approach 1:
The patent merges the alignment and positioning functions into a single integrated alignment arrangement that combines multiple receiving shafts in a fixed geometric configuration. This unified structure provides both protection for the pressure plates and correct positioning of magnetic elements simultaneously, avoiding the need for separate protective mechanisms and reducing overall process complexity
Solution Approach 2:
The alignment arrangement serves multiple functions: it aligns magnetic elements, positions them with correct orientation, protects pressure plates during insertion, and enables simultaneous handling of multiple elements. This multi-functional design eliminates the need for separate protective devices, maintaining simplicity while ensuring pressure plate integrity
3Manufacturing precision
If magnetic elements are positioned and secured in the alignment arrangement before transfer to receiving nests, then insertion is controlled and safe, but the device structure becomes more complex with additional alignment components
Solution Approach 1:
The alignment arrangement is segmented into multiple independent receiving shafts arranged in a fixed geometric pattern around the central axis. Each receiving shaft is a simple cylindrical component that individually holds and positions a magnetic element. This segmentation allows precise positioning of each element while keeping individual components simple and the overall structure manageable
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 ensures magnetic elements are safely positioned without damaging pressure plates, allowing for simultaneous transfer of all required elements to the rotor unit, with the alignment mechanism providing a defined force and space-efficient arrangement.
Implementation Method 1
The receiving shafts are arranged in spring-loaded slide elements of one of the alignment ring elements. The spring-loaded slide elements ensure that the magnetic elements are not clamped when the alignment arrangement is transferred from the receiving position to the assembly position, but are only held with a defined force, which is determined by the spring characteristic of the respective spring elements
Data Source
Figure 1
Figure 2
Figure 3a~3b
AI summary
The invention relates to an assembly device for fitting a rotor unit of an electric motor with a plurality of magnet elements, which rotor unit can be rotated about an axis (D), said assembly device having an aligning assembly having a plurality holding shafts for holding and position one magnet element each, the holding shafts being arranged peripherally around a center axis (M) of the aligning assembly corresponding to the axis (D) of the rotor unit, at a radius (R).