Electric Motor Mid-Shield Axial Positioning
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Solution Overview
Problem
Existing electric motors are bulky and costly due to the need for multiple components and mounting structures, which hinders efforts to reduce weight and expense.
Innovation Solution
The design incorporates a mid-shield with clinches and cap screws, along with cap sleeves that transfer clamping loads to maintain the integrity of the mid-shield and bearing pocket, allowing for axial positioning and reduced material usage, and the use of clinches for fastener-free mounting, which reduces motor size and part count.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If traditional mounting structures and multiple components are used, then the motor provides sufficient mechanical strength and reliability, but the motor size and weight increase
Solution Approach 1:
The patent combines the mid-shield and end-shield functions into a single integrated shield structure, eliminating the need for separate mounting structures. The shield serves both as a structural support element and as a mounting surface for the motor control unit, reducing the total number of components and overall motor size while maintaining mechanical strength
Solution Approach 2:
The shield structure is designed to perform multiple functions: providing structural support, housing bearings, and serving as a mounting surface for the motor control unit. This multi-functional design eliminates the need for dedicated mounting brackets or additional structural components, thereby reducing motor size without compromising mechanical strength
2Reliability
If multiple components and mounting structures are included, then the motor achieves reliable assembly and durability, but the manufacturing cost increases
Solution Approach 1:
By merging the mid-shield and end-shield into a single integrated component, the patent reduces the total number of parts that need to be manufactured, stored, and assembled. This consolidation reduces manufacturing complexity and cost while maintaining assembly reliability through the integrated design
Solution Approach 2:
The patent extracts and eliminates unnecessary intermediate components from the traditional motor structure. By removing redundant mounting structures and combining functions into essential components like the shield, the design reduces part count and manufacturing cost while maintaining reliable assembly through simplified, purpose-driven component design
3Stability of the object's composition
If traditional shield mounting methods are used, then the shield is securely positioned, but the motor control unit replacement is difficult
Solution Approach 1:
The patent segments the motor assembly into distinct modular components: the integrated shield assembly and the motor control unit. The shield provides secure positioning through its integrated design, while the motor control unit remains as a separate, easily removable module, facilitating simple replacement without disturbing the shield structure
Data Source
AI summary
An electric motor is described that includes a mid-shield, a chassis, and a motor control unit configured to be mounted to the chassis. The chassis includes a plurality of clinches formed proximate a first end of the chassis and configured to provide axial positioning of the mid-shield with respect to the chassis.