Electromagnetic Actuator Independent Support Sections
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Solution Overview
Problem
Existing electromagnetic actuators for active vibration damping face issues with the fixation force of the annular member, which can lead to sinkage and damage due to direct fixation of the bobbin to the synthetic resin annular member, affecting vibration transmission and sealing.
Innovation Solution
The electromagnetic actuator design includes separate support sections for the coil member and the annular member, with the first support section fixing the coil member and the second support section fixing the annular member independently, and the use of seal rubber to moderate clamping force variability and prevent excess force on the annular member.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the bobbin supporting the coil is directly fixed to the annular member, then the fixation structure is simple, but the fixation force for the annular member is reduced due to vibration between the mover and stator
Solution Approach 1:
The support structure is divided into two independent sections: a first support section that clamps the coil member and a second support section that clamps the annular member. This segmentation allows each section to be optimized independently - the first support section can provide strong fixation for the coil while the second support section provides adequate fixation for the annular member without being overloaded by axial driving forces.
Solution Approach 2:
The first support section acts as an intermediary structure between the axial driving force and the second support section. It absorbs and bears the axial driving force generated by the electromagnetic actuator, preventing this force from being transmitted to the annular member and causing fixation force reduction.
2Reliability
If the outer peripheral end of the annular member is clamped by the outer tubular member and bracket, then sealing of the internal space is maintained, but the annular member may be worn out or damaged due to excess clamping force
Solution Approach 1:
The clamping function is segmented between two support sections. The first support section handles the coil member clamping while the second support section handles the annular member clamping. This prevents concentration of excessive clamping forces on the annular member that would occur with a single unified clamping structure.
Solution Approach 2:
The clamping force parameters are optimized separately for each support section. The first support section is designed with clamping parameters suitable for the coil member, while the second support section uses clamping parameters appropriate for the annular member, preventing excessive force that would damage the resin material.
3Device complexity
If a single support structure is used for both coil member and annular member, then the device structure is compact, but vibration of the stator relative to the mover travels to the outer peripheral end affecting vibration transmission
Solution Approach 1:
The support structure is segmented into two independent clamping sections that are parallel to each other. This segmentation creates independent vibration paths, preventing vibration from the electromagnetic actuator from traveling through the support structure to the outer peripheral end, thereby maintaining precise vibration transmission characteristics.
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 maintains a strong fixation force for the axial driving force while minimizing the risk of sinkage and damage to the resin annular member, ensuring stable vibration transmission and effective sealing against debris and moisture.
Implementation Method 1
a coil member (72, 72) which generates an electromagnetic force through energization thereto
Data Source
AI summary
An electromagnetic actuator including: an outer tubular member and an inner axial member connected by an elastic member; a coil member attached to the outer tubular member generating electromagnetic force through energization thereto; a magnet member attached to the inner axial member and subjected to the electromagnetic force to exert axial driving force between the inner axial member and the outer tubular member; a first support section provided at the outer tubular member to axially clamp and securely support the coil member; a synthetic resin annular member housed within the outer tubular member including a power feed terminal to the coil member; and a second support section provided at the outer tubular member to axially clamp and securely support the annular member in such a parallel structure that clamping force by the first support section is not exerted on the second support section.