Motor Holder Attachment via Frame Insertion and Crimping
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Solution Overview
Problem
The reliability of the attachment structure between the holder and the frame in motors is crucial for maintaining motor performance, but existing designs face challenges in withstanding lateral pressure and ensuring accurate assembly and durability.
Innovation Solution
A motor design featuring a holder with a tubular portion for bearing support and an outer peripheral portion with circumferentially arranged hole portions, where the inner frame portions are inserted and bent to securely attach the holder to the housing, enhancing attachment strength and durability by crimping the protruding portions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional holder attachment structure is used, then the device complexity is low, but the reliability and ability to withstand lateral pressure deteriorates
Solution Approach 1:
The holder is divided into multiple functional segments: a tubular portion for bearing support and an outer peripheral portion with multiple hole portions. This segmentation allows each part to perform its specific function optimally, improving attachment reliability while maintaining manageable complexity through modular design
Solution Approach 2:
The attachment structure uses a nested configuration where the inner peripheral portion of the frame is inserted into the hole portions of the holder, and protruding portions are nested within the holder structure. This nesting approach creates a robust multi-layered attachment that enhances reliability without requiring entirely separate attachment components
2Strength
If a simple holder structure is used, then the manufacturing is easier, but the durability and attachment strength deteriorates
Solution Approach 1:
The holder is designed with pre-formed hole portions and the frame is designed with pre-formed protruding portions that fit into these holes. This preliminary preparation of attachment features allows for strong, reliable attachment while simplifying the manufacturing process, as the complex attachment geometry is built into the components during forming rather than requiring post-assembly operations
3Manufacturing precision
If the holder attachment is not robust, then the assembly is faster, but the assembly accuracy and positioning precision deteriorates
Solution Approach 1:
The division of the holder into distinct functional zones (tubular portion and outer peripheral portion with hole portions) creates natural positioning features that guide accurate assembly. The segmented design with multiple hole portions distributed circumferentially provides multiple alignment points, ensuring high assembly accuracy while the modular nature facilitates quick assembly operations
Data Source
AI summary
A motor including: a frame having an inner peripheral portion; a holder configured to be supported by the frame; a shaft passing through the inner peripheral portion of the frame; and a bearing configured to support the shaft, and the holder includes: a tubular portion configured to hold the bearing; and an outer peripheral portion provided with a plurality of hole portions arranged in a circumferential direction, and each of portions of the inner peripheral portion of the frame are inserted into a distinct one of the plurality of hole portions.