Motor Cover Recess Alignment for Coaxial Cup Body Assembly
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Solution Overview
Problem
Conventional electric motors face challenges in aligning cup bodies coaxially during assembly, leading to instability and inefficiencies in the rotation of the motor shaft.
Innovation Solution
The motor design incorporates a cover with a first and second cup body, each featuring a bottomed tubular shape with specific recesses and claw portions, allowing for easy alignment and fixation by hooking the claw portions onto corresponding recesses, ensuring coaxial arrangement and stabilization of the motor shaft.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional brackets with locking pieces and locking claws are used to fix cup bodies, then the cup bodies can be fixed together, but it is difficult to align the cup bodies coaxially at the time of assembly
Solution Approach 1:
The flange portions are provided with multiple recesses (first recesses and second recesses) that are pre-formed during manufacturing. These recesses serve as alignment guides that automatically position the cup bodies coaxially when the claw portions are hooked onto them, eliminating the need for complex alignment operations during assembly
Solution Approach 2:
The recesses in the flange portions act as intermediary alignment features between the two cup bodies. By providing these intermediate guiding structures, the patent enables automatic coaxial alignment without requiring precise manual positioning or complex alignment mechanisms
2Manufacturing precision
If multiple recesses and claw portions are added to the flange portions for alignment and fixation, then coaxial alignment is achieved, but the device complexity increases
Solution Approach 1:
The flange portions serve multiple functions: they provide structural support for the cup bodies, enable coaxial alignment through the recesses, and facilitate fixation through the claw portions. By combining these functions into a single structural element, the patent avoids adding separate alignment and fixation components, thereby limiting the increase in device complexity
3Reliability
If the claw portions are made with narrower circumferential width than the recesses, then secure hooking and fixation are achieved, but the manufacturing precision requirements increase
Solution Approach 1:
The claw portions are designed with localized dimensional characteristics where the circumferential width is intentionally made narrower than the recesses. This local quality difference creates a secure interference fit that provides reliable fixation while the overall tolerance requirements are managed through the generous clearance design between claw width and recess size
Data Source
AI summary
A motor includes a cover with first and second cup bodies. A flange portion of each of the first and second cup bodies includes first recesses recessed radially inward from an outer peripheral edge of the flange portion and evenly spaced apart in a circumferential direction of the flange portion, second recesses recessed radially inward from the outer peripheral edge of the flange portion, have a same circumferential width as that of the first recess, and are evenly spaced apart in the circumferential direction, a total number of the second recesses is the same as a total number of first recesses, and claw portions extending radially outward from a bottom surface of the corresponding second recess and have a circumferential width narrower than that of the second recess.