Actuator Mover Alignment via Integrated Bearing Unit
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Solution Overview
Problem
Conventional actuators face difficulties in aligning the center axis of the mover and stator, leading to non-uniform gaps and unstable thrust force characteristics due to separate component assembly, which results in misalignment and potential damage to permanent magnets and bearing components.
Innovation Solution
The actuator design integrates the mover and bearing parts as a single unit, with a non-magnetic cylindrical body installed between the mover and stator to maintain a constant gap and prevent misalignment, ensuring accurate alignment and reduced wear on bearing components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the mover and stator are assembled as separate components, then the device can be manufactured and assembled, but the center axis alignment between mover and stator becomes difficult to achieve, resulting in non-uniform gaps
Solution Approach 1:
The patent combines the mover and bearing parts into a single integrated unit. The bearing is directly mounted on the mover's shaft, eliminating the need for separate assembly of mover and bearing components. This integration ensures that the center axis of the mover and stator aligns automatically during assembly, solving the alignment precision problem while maintaining ease of manufacture.
2Ease of operation
If separate components are assembled in a lump, then assembly can be performed, but uniform gap between mover and stator cannot be maintained, leading to unstable thrust force
Solution Approach 1:
By integrating the bearing and mover into one unit, the patent ensures that the gap between the mover and stator remains uniform during operation. The integrated structure prevents relative displacement between the mover and bearing, maintaining consistent magnetic field gaps and stable thrust force characteristics throughout the actuator's operational life.
3Adaptability or versatility
If mover and stator are assembled separately, then component flexibility is maintained, but misalignment occurs causing damage to permanent magnets and bearing components
Solution Approach 1:
The patent integrates the bearing and mover into a single unit, which eliminates misalignment between these components. This integration prevents excessive forces from being applied to the permanent magnets and bearing components during operation, thereby reducing the risk of damage while maintaining the overall flexibility of the actuator system.
4Ease of manufacture
If center axis alignment is difficult to achieve, then assembly can proceed, but alignment accuracy decreases leading to increased wear on bearing components
Solution Approach 1:
By combining the mover and bearing into one integrated unit, the patent ensures automatic center axis alignment during assembly. This eliminates alignment errors that would otherwise cause increased wear on bearing components, thereby extending the operational lifespan of the actuator while maintaining ease of assembly.
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 configuration allows for easy and accurate alignment of the center axes, maintaining a uniform gap and stable thrust force, reducing the risk of component damage and extending the lifespan of the actuator.
Implementation Method 1
a magnetic field part having a plurality of cylindrical permanent magnets is provided on a peripheral surface of a shaft body
Implementation Method 2
both end parts of the mover (shaft) are slidably held in case bodies through bearing members such as bushes, flat springs, or the like
Data Source
AI summary
Provided are an actuator capable of easily aligning the center axis of an entire apparatus including a mover and a stator, and a method of manufacturing the actuator. The actuator includes a mover unit which includes a mover having a magnetic field part attached to a peripheral surface of center part of a shaft, bearing parts provided on both end parts of the shaft, a cylindrical body which houses the center part of the shaft and the magnetic field part therein, and has both end parts connected to the bearing parts. A stator in which coils are wound on a core and case bodies are fixed to each other by screws, and then the mover unit is inserted into a fixed body of the stator and the case bodies from an opening side of the case body.