Armature Insulator Retaining Section for Terminal Alignment
Solution Overview
Problem
Conventional armatures with divided cores face positional misalignment and interference issues due to differing numbers of winding turns on tooth portions, leading to misalignment of terminal portions of windings and crossing wires.
Innovation Solution
The armature incorporates a retaining section with a guiding projection to support and align the terminal portions of windings and crossing wires, preventing misalignment and interference by using a snap-fit structure and guide projections to maintain proper positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the terminal portion of the wound portion is retained by a snap-fit structure when the number of turns differs by 0.5 turns, then the wound portion is securely retained, but the terminal portion of the crossing wire cannot be retained causing positional misalignment
Solution Approach 1:
The retaining structure is divided into two distinct functional sections: a snap-fit structure for retaining the wound portion terminal and a guiding structure for positioning the crossing wire terminal. This segmentation allows each structure to independently perform its specific function without interfering with the other, resolving the contradiction between secure retention and precise positioning.
Solution Approach 2:
The insulator serves as an intermediary component that houses both the snap-fit structure and the guiding structure. By providing a dedicated guiding structure within the insulator, the crossing wire terminal is properly positioned without requiring modification to the snap-fit retention mechanism, thus maintaining both retention reliability and positioning precision.
2Volume of moving object
If the terminal portions are positioned at side portions on the same side of the tooth portion, then space is saved, but interference with other portions occurs due to misalignment
Solution Approach 1:
The insulator is designed with different local structures at different positions: a snap-fit structure at one location for wound portion retention and a guiding structure at another location for crossing wire positioning. This local differentiation allows both terminal portions to be positioned compactly on the same side without causing interference, as each terminal is managed by its dedicated structural feature.
3Reliability
If multiple insulators with multiple insulation portions are used to cover core configuration members, then insulation is improved, but the complexity of assembling and aligning terminal portions increases
Solution Approach 1:
The insulator is designed to perform multiple functions simultaneously: providing insulation between the core configuration members and windings, housing the snap-fit structure for wound portion retention, and incorporating the guiding structure for crossing wire positioning. This multi-functionality reduces the need for separate components and simplifies the overall assembly process while maintaining insulation reliability.
Data Source
AI summary
There is provided an armature including: an armature core that includes plural tooth portions extending in a radial direction and disposed in a row around a circumferential direction; an insulator including plural insulation portions integrated with the armature core; plural windings each including plural wound portions wound on the tooth portions with the insulation portions interposed between the wound portions and the tooth portions, and a crossing wire connecting the plural wound portions together; wherein at a tooth portion, a terminal portion of a wound portion and a terminal portion of a crossing wire are positioned at side portions of the tooth portion on the same side as each other in the circumferential direction; and the insulator is provided with a retaining section that retains the terminal portion of the wound portion and guides the terminal portion of the crossing wire.