Exposed-Core Stator Structure for Accurate Housing Positioning
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Solution Overview
Problem
The existing stator designs for electric motors face challenges in positioning the stator within the motor housing without a cover, as omitting the cover leads to difficulties in aligning the stator properly during insertion.
Innovation Solution
A stator design where the stator core has coil portions protruding from both ends, with at least one end surface exposed from a coating resin, allowing the exposed surface to act as a stopper when inserted into the housing, and a projection on the housing fixes the stator's position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the cover is omitted from the stator, then the cost is reduced, but the positioning of the stator in the housing becomes difficult
Solution Approach 1:
The stator core's own end surface serves as the positioning stopper, eliminating the need for a separate cover component. The structure uses itself for positioning by having the end surface of the stator core protrude from the coating resin to contact the housing projection,实现 self-positioning without additional parts.
2Ease of operation
If the end surface of the stator core is exposed from the coating resin, then the positioning function is achieved, but the coating coverage is reduced
Solution Approach 1:
The coating resin is applied selectively - covering the coil portions completely while leaving the end surface of the stator core exposed. This local differentiation allows the coating to provide protection where needed (on coils) while permitting the end surface to serve its positioning function without coating interference.
Data Source
AI summary
Provided are a stator and an electric motor that are configured such that the stator can be arranged properly with respect to a housing. The stator of one embodiment includes: a stator core; a coil provided on the stator core and having a coil portion protruding in a direction of an axis (AX) from each of both end surfaces of the stator core in the direction of the axis: and a coating resin coating the coil portion. At least one of the both end surfaces of the stator core in the direction of the axis is partially exposed from the coating resin.