Electromagnetic Actuator Constricted Section Assembly
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Solution Overview
Problem
Conventional electromagnetic actuators for active vibration-control and damping devices face challenges in maintaining assembly accuracy and preventing interference between plate springs and the inner axial member during oscillation, due to intricate structures and difficulties in visual inspection of the assembly process.
Innovation Solution
The electromagnetic actuator incorporates an outer tubular member with a constricted section having axially inner and outer stepped walls, allowing precise assembly and positioning of the stator or mover, and plate springs, which are supported by lid members and a pressing member to prevent interference and ensure accurate assembly without additional spacers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If plate springs and coil members are superposed and assembled to the side of the bottom of the outer housing metal fitting, then assembly is simplified, but assembly accuracy deteriorates and visual inspection becomes difficult
Solution Approach 1:
The patent inverts the conventional assembly direction by assembling components from the top opening of the outer housing rather than from the bottom. The plate springs are inserted through the top opening and positioned on the outer peripheral surface, allowing visual inspection during assembly while maintaining assembly simplicity.
2Device complexity
If plate springs are assembled to the bottom side of the outer housing metal fitting, then structure is simplified, but interference with the inner axial member occurs during oscillation
Solution Approach 1:
The patent moves the plate spring assembly from the bottom side (one dimension) to the top opening and outer peripheral surface (another dimension). This spatial repositioning eliminates interference with the inner axial member during oscillation while maintaining structural simplicity through the use of the outer peripheral surface for positioning.
3Reliability
If a separate spacer or stepped shape is used to prevent plate spring interference, then interference is prevented, but device complexity increases
Solution Approach 1:
The patent makes the outer peripheral surface of the outer housing serve multiple functions: it acts as both the positioning surface for the plate springs and the structural element that prevents interference with the inner axial member. This eliminates the need for separate spacers or stepped shapes, maintaining structural simplicity while ensuring reliable interference prevention.
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 enhances assembly accuracy, prevents interference between the stator, mover, and plate springs, and simplifies the manufacturing process, improving the durability and reliability of the electromagnetic actuator by maintaining a predetermined space and facilitating visual inspection.
Implementation Method 1
The electromagnetic force exerted between a stator and a mover acts on the inner axial member and the outer housing member, thereby providing an axial oscillation force
Implementation Method 2
both axial sides of an inner axial member are elastically supported in relation to an outer housing member by plate springs
Data Source
AI summary
An electromagnetic actuator including: an inner axial member; an outer housing member; a stator and a mover configured to have electromagnetic oscillation force exerted between them, each being securely assembled to different one of the members; and plate springs elastically connecting the members at opposite axial sides thereof, wherein the outer housing member includes an outer tubular member and first and second lid members attached to opposite axial openings thereof, and a first axial side of the outer tubular member has a small-diameter constricted section, and the constricted section has axially inner and outer stepped walls, and the axially inner stepped wall positions a first axial side of the stator or the mover assembled to the outer housing member, while the axially outer stepped wall and the first lid member support a periphery of the corresponding plate spring.