Coil Case Positioning Structure for Precise Electromagnetic Assembly
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Solution Overview
Problem
The displacement of coil cases in the radial direction of the core body makes it difficult to accurately and easily assemble electromagnetic devices.
Innovation Solution
The electromagnetic device features a core body with an outer peripheral iron core and multiple iron cores, where coils are installed on the iron cores and partially covered by coil cases with mating parts formed on both the core body and coil cases to secure their alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If coil cases are used to insulate coils from the core body, then insulation is improved, but the coil cases may be displaced in the radial direction making assembly difficult
Solution Approach 1:
The coil case is divided into a case body and a separate positioning protrusion that engages with a corresponding positioning groove on the core body. This segmentation allows the coil case to maintain insulation functionality while adding a dedicated positioning feature that prevents radial displacement during assembly.
Solution Approach 2:
The positioning protrusion and positioning groove act as intermediary features between the coil case and core body. These intermediary elements facilitate accurate alignment and prevent displacement without compromising the insulation function of the coil case.
2Reliability
If coil cases are used to insulate coils from the core body, then insulation is improved, but positioning accuracy deteriorates
Solution Approach 1:
The coil case is divided into a case body and a separate positioning protrusion that engages with a corresponding positioning groove on the core body. This segmentation allows the coil case to maintain insulation functionality while adding a dedicated positioning feature that prevents radial displacement during assembly.
Solution Approach 2:
The positioning protrusion is pre-formed on the coil case to match the positioning groove on the core body. This preliminary positioning feature ensures accurate alignment is achieved during assembly, eliminating the need for post-assembly adjustments and maintaining manufacturing precision.
Data Source
AI summary
The present invention prevents a coil case from being mispositioned in the radial direction of a coil body. A core body (5) of an electromagnetic device (6) includes an outer peripheral iron core (20) and at least three iron cores (41 to 44). The electromagnetic device further includes coils (51 to 54) mounted to the iron cores and coil cases (61 to 64). Fitting parts (70 and 80) for fitting the core body and the coil cases to each other are formed on the core body and each of the coil cases.