Rotary Reciprocating Actuator Assembly With Separate Magnetic Core Alignment
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Solution Overview
Problem
The assembly of rotary reciprocating drive actuators with magnetic circuits requires high precision, making it difficult to simultaneously assemble the magnetic circuit and the support structure, leading to increased assembly time and complexity.
Innovation Solution
A configuration featuring a main body unit with a movable shaft and magnet, a core assembly with magnetic poles and a coil, and a connecting surface portion that integrates the core assembly with the base portion, allowing for separate assembly and alignment of components for improved accuracy and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the magnetic circuit and support structure are assembled simultaneously, then assembly precision can be maintained, but assembly time increases and complexity increases
Solution Approach 1:
The actuator is divided into two independent assemblies: the magnetic circuit assembly (including core, coil, and magnet) and the support structure assembly (including shaft and bearing holders). These can be manufactured and pre-assembled separately, then integrated later, reducing overall assembly time while maintaining precision through dedicated fixture alignment during the final integration step.
Solution Approach 2:
The magnetic circuit components (core, coil, magnet) are pre-assembled into a complete magnetic circuit assembly before being integrated with the support structure. This preliminary assembly allows for quality control and alignment to be performed on the magnetic circuit independently, and the pre-assembled unit can then be quickly positioned and fixed to the support structure using alignment fixtures.
2Manufacturing precision
If the magnetic circuit and support structure are assembled simultaneously, then assembly accuracy can be ensured, but device complexity increases
Solution Approach 1:
The actuator is divided into two independent assemblies: the magnetic circuit assembly (including core, coil, and magnet) and the support structure assembly (including shaft and bearing holders). These can be manufactured and pre-assembled separately, then integrated later, reducing overall assembly time while maintaining precision through dedicated fixture alignment during the final integration step.
Solution Approach 2:
Alignment fixtures serve as intermediary tools during the integration process. These fixtures temporarily hold the magnetic circuit assembly and support structure in their correct relative positions, making the alignment process simple and repeatable. After assembly, the fixtures are removed and the permanent structural elements (housing, fasteners) maintain the alignment.
3Productivity
If separate assembly of magnetic circuit and support structure is performed, then assembly time is reduced, but assembly accuracy may deteriorate
Solution Approach 1:
The magnetic circuit components (core, coil, magnet) are pre-assembled into a complete magnetic circuit assembly before being integrated with the support structure. This preliminary assembly allows for quality control and alignment to be performed on the magnetic circuit independently, and the pre-assembled unit can then be quickly positioned and fixed to the support structure using alignment fixtures.
Solution Approach 2:
Alignment fixtures serve as intermediary tools during the integration process. These fixtures temporarily hold the magnetic circuit assembly and support structure in their correct relative positions, making the alignment process simple and repeatable. After assembly, the fixtures are removed and the permanent structural elements (housing, fasteners) maintain the alignment.
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 ensures high assembly accuracy, reduces assembly time, and enables stable driving performance by allowing for precise alignment and integration of the magnetic circuit and support structure.
Implementation Method 1
a magnet position holding portion that generates a magnetic attraction force between the magnet position holding portion and the magnet to define a reference position of the reciprocating rotation
Implementation Method 2
a coil body that is wound around the core body and that is energized to generate a magnetic flux interacting with the magnet to cause a reciprocating rotation of the movable body
Data Source
AI summary
A rotary reciprocating drive actuator includes: a main body unit including: a movable body including a shaft part to which a movable object is connected and to which a magnet is fixed, and a base portion including a pair of wall portions disposed to sandwich the movable object, the base portion supporting the shaft part by the pair of wall portions; a core assembly including: a core body including a plurality of magnetic poles facing an outer circumference of the magnet, a coil body, and a magnet position holding portion; and a connecting surface portion that is integrally disposed on the one end portion side of the core assembly, and that is attached to the one wall portion in a state where the shaft part is inserted into an opening portion and the magnet is disposed in the core assembly.