Electric Supply Structure Motor Attitude Stabilization
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Solution Overview
Problem
The existing electric supply structure is susceptible to variations in the rotating and holding attitude of the motor, leading to inferior mountability of the mating connector due to manufacturing errors and the integral movement of the terminal with the motor, which results in reduced manufacturing efficiency and connector alignment issues.
Innovation Solution
The electric supply structure incorporates a terminal with a bus bar portion movably mounted to the body and a housing with first and second pressing portions of different stiffnesses to stabilize the motor's rotational attitude, ensuring precise alignment and reduced manufacturing complexity by eliminating the need for terminal fixation on the body.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the terminal is fixed on the motor, then manufacturing processes are simplified and manufacturing time is reduced, but the rotational attitude of the terminal varies due to manufacturing errors, leading to inferior connector mountability
Solution Approach 1:
The terminal is divided into three distinct portions: a bus bar portion movably mounted to the body, a motor-side terminal portion fixed to the motor, and a connector-side terminal portion for connector connection. This segmentation allows the terminal to accommodate rotational variations while maintaining electrical connection efficiency.
Solution Approach 2:
The bus bar portion is designed with movable mounting to the body, allowing it to dynamically adjust to rotational attitude variations of the motor. This dynamic configuration compensates for manufacturing errors and ensures proper connector alignment without requiring precise fixed positioning.
2Manufacturing precision
If the terminal is movably mounted to the body, then connector mountability is improved, but the terminal structure becomes more complex
Solution Approach 1:
The terminal is segmented into functional portions with the bus bar portion providing movable mounting. This segmentation achieves precise connector alignment while maintaining relatively simple overall structure by distributing functions across different portions rather than requiring complex mechanisms throughout.
Solution Approach 2:
The movable mounting feature is applied locally to the bus bar portion rather than the entire terminal structure. This localized approach achieves the necessary alignment precision only where required (at the connector interface) while keeping the rest of the terminal structure simple and easy to manufacture.
Data Source
AI summary
An electric supply structure includes a body including plural shaft support portions, a housing being joined with the body, a motor being positioned between the body and the housing, being restricted from moving in an axial direction of a motor shaft by the shaft support portion and being rotatably supported about the motor shaft, a terminal being connected to the motor, and a connector being provided with an insertion hole. The terminal includes a bus bar portion movably mounted to the body, a motor-side terminal portion being fixed on the motor so as to supply electricity and a connector-side terminal portion being positioned to be inserted into the insertion hole. The housing includes first and second pressing portions having different stiffnesses and being configured to hold the motor while displacing a rotational attitude of the motor about the motor shaft in a specific direction by pressing the motor.