Oscillatory Linear Actuator Compact Design
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Solution Overview
Problem
Conventional oscillatory linear actuators have large dimensions in the direction of reciprocating motion due to the alignment of elastic supports and coupling springs, which interferes with the stator and increases the overall size.
Innovation Solution
An oscillatory linear actuator design featuring an electromagnet with a permanent magnet and a coupling spring system that allows the movable bodies to reciprocate in a direction perpendicular to the magnetic field, reducing the dimension in the reciprocating motion direction by using a holder to provide space between the movable bodies and the electromagnet, and coupling springs that couple the movable bodies without interfering with their motion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the elastic support and coupling spring are aligned in the direction of reciprocating motion, then the structure is simple, but the dimension in the reciprocating motion direction becomes large
Solution Approach 1:
The patent applies dimensionality change by reorienting the alignment of the elastic support and coupling spring from the reciprocating motion direction (first direction) to a perpendicular direction (second direction). This spatial reconfiguration allows the components to maintain their structural simplicity while no longer contributing to the dimension in the reciprocating motion direction, thus resolving the technical contradiction between structural simplicity and compactness in the motion direction.
2Area of stationary object
If the coupling spring and stator are aligned in the direction of reciprocating motion, then the structure is compact in other directions, but space must be provided to prevent interference, increasing the dimension in reciprocating motion direction
Solution Approach 1:
The patent resolves this contradiction by changing the alignment direction of the coupling spring and stator from the reciprocating motion direction to a perpendicular direction. This dimensional change allows the components to be compact in the cross-sectional area while eliminating the need for additional space in the reciprocating motion direction to prevent interference, as the coupling spring now moves perpendicular to the stator's position.
3Reliability
If the coupling spring is positioned to couple movable bodies, then the movable bodies are connected, but the spring interferes with the stator when aligned in the reciprocating motion direction, requiring additional space
Solution Approach 1:
The patent maintains the reliable connection between movable bodies through the coupling spring while resolving the interference issue by repositioning the spring's alignment to the second direction (perpendicular to reciprocating motion). This dimensional change allows the spring to effectively couple the movable bodies without interfering with the stator, eliminating the need for additional space in the reciprocating motion direction.
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 design effectively reduces the dimension in the reciprocating motion direction of the oscillatory linear actuator without affecting the movable widths, allowing for a more compact structure while maintaining the necessary motion amplitude.
Implementation Method 1
an electromagnet that changes a magnetic field periodically, a first movable body that is disposed on one side in a first direction of the electromagnet, includes a permanent magnet that makes a reciprocating motion in a second direction intersecting with the first direction under action of the magnetic field generated by the electromagnet
Implementation Method 2
a coupling spring that is disposed on one side in the first direction of the holder and couples the first movable body and the second movable body
Data Source
AI summary
An oscillatory linear actuator includes an electromagnet that changes a magnetic field periodically, a first movable body, a second movable body, a holder, and a coupling spring. The first movable body is disposed on one side in the first direction of the electromagnet, includes a permanent magnet, and acts on a target object. The permanent magnet reciprocates in a second direction intersecting with the first direction by the electromagnet. The second movable body is juxtaposed to the first movable body and reciprocates in the second direction. The holder holds the first and second movable bodies to provide space between the first and second movable bodies and the electromagnet and to allow the first and second movable bodies to move in the second direction. The coupling spring is disposed on one side in the first direction of the holder and couples the first movable body and the second movable body.