Self-Centering Terminal Mounting Structure for Coaxial EV Charging
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Solution Overview
Problem
In the field of electrical connections for new energy automobiles, the existing plugged structure of charging gun heads and stands often experiences axis deviation during assembly, leading to poor connections, increased contact resistance, and safety hazards due to 'failure infection', which can cause fires and further accidents.
Innovation Solution
A self-adjusting centering terminal mounting structure with a conductive terminal and terminal clamping seat featuring a clamping groove and mounting hole with a mounting clearance, allowing for automatic centering adjustment in both axial and radial directions, thereby adapting to different charging stands or gun heads and preventing 'failure infection'.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If tight fit or small clearance fit is used to fix the conductive terminal, then the terminal stability is improved, but the axis deviation and plugging failure occur due to manufacturing errors
Solution Approach 1:
The patent changes the clearance parameter from tight fit/small clearance to large clearance, allowing the conductive terminal to move freely within the terminal clamping seat. This parameter change enables automatic centering adjustment and accommodates manufacturing errors, resolving the contradiction between terminal stability and plugging reliability
Solution Approach 2:
The patent implements self-service through automatic centering adjustment, where the conductive terminal automatically positions itself coaxially with the charging stand terminal through the large clearance space. This self-adjusting mechanism eliminates the need for precise pre-positioning and compensates for manufacturing deviations, ensuring reliable plugging without external intervention
2Measurement precision
If tight fit is used to prevent terminal movement, then the terminal positioning accuracy is improved, but the manufacturing accuracy requirements increase
Solution Approach 1:
The patent changes the fit parameter from tight fit to large clearance fit, which reverses the traditional approach. Instead of using tight fit to achieve positioning accuracy, the large clearance allows the terminal to self-adjust to the correct position, thereby reducing manufacturing accuracy requirements while maintaining terminal positioning accuracy
Solution Approach 2:
The patent introduces dynamic adjustment capability through the large clearance design, allowing the conductive terminal to move and self-position during the plugging process. This dynamic self-centering mechanism replaces the static tight fit approach, reducing the need for high manufacturing precision while ensuring accurate terminal positioning
3Stability of the object's composition
If tight fit is used to secure the terminal, then the connection stability is improved, but the contact resistance increases due to axis deviation
Solution Approach 1:
The patent changes the clearance parameter to large clearance, which enables the conductive terminal to automatically center itself during plugging. This ensures coaxial alignment between terminals, maintaining low contact resistance while providing connection stability through the secure large clearance fit after self-positioning
Solution Approach 2:
The self-centering mechanism allows the conductive terminal to automatically achieve coaxial alignment with the charging stand terminal through the large clearance space. This self-adjusting process ensures optimal electrical contact and low contact resistance, while the subsequent large clearance fit maintains connection stability without requiring tight mechanical constraints
Data Source
AI summary
The present disclosure provides a self-adjusting and centering terminal mounting structure, including a conductive terminal and a terminal clamping seat. The conductive terminal includes a fixed section. The fixed section is externally provided with a clamping groove. The terminal clamping seat is internally provided with a mounting hole. The clamping groove of the conductive terminal is disposed in the mounting hole, and a mounting clearance is formed between the clamping groove and the mounting hole. The self-adjusting centering terminal mounting structure can realize automatic centering adjustment between terminals of a plugged structure, thereby not only adapting to plugging and unplugging of different charging stands or charging gun heads, but also avoiding the spread of ‘failure infection’.