Self-Locked Charging Bolt Prevents Manual Manipulation
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Solution Overview
Problem
Existing locking devices for electric or hybrid motor vehicle charging systems can be easily manipulated into the 'locked' position, allowing unauthorized access and misuse, as external forces can shift the cam and transmission, making the 'locked' position insecure.
Innovation Solution
A third 'self-locked' position is introduced, where the bolt element is locked by the motor-driven drive, and manual action cannot unlock it without motor-driven adjustment, ensuring the bolt element and drive are abutted to prevent torque transmission, thus enhancing safety and preventing manipulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a cam and multistage transmission are used to shift the bolt element into locked and unlocked positions, then the bolt element can be positioned in two distinct states, but the locked position can be easily deselected by external manipulation
Solution Approach 1:
The bolt element is moved into a third self-locked position that is beyond the normal locked position. This preliminary over-travel action creates a state where the bolt element is securely engaged with the drive mechanism, making it impossible to manually return to the unlocked position without motor-driven adjustment. The self-locked position is established in advance to prevent any subsequent manipulation.
2Reliability
If the bolt element is moved into a third self-locked position beyond the locked position, then unlocking without the drive becomes impossible, but the device complexity increases
Solution Approach 1:
The system utilizes the dynamic range of the existing motor-driven transmission mechanism to create a third self-locked position. By extending the travel range of the bolt element beyond the traditional two positions, the system leverages the existing dynamic capabilities of the motor and transmission without requiring additional locking mechanisms or complex structural modifications.
Data Source
AI summary
A locking device for an electrical charging device of a motor vehicle, in particular an electric or hybrid vehicle. The locking device is equipped with a movable bolt element, which is provided for releasably locking a charging plug in a charging socket of the electrical charging device. In addition, the movable bolt element can be moved at least into the positions “unlocked” and “locked.” Furthermore, a motor-driven drive is realized, which is provided for moving the bolt element. According to the invention, the bolt element can be moved into a third “self-locked” position beyond the “locked” position, which can be reached by means of the drive and in which unlocking is impossible without the drive.