Trailer Coupler Security Device with Nested Locking Mechanism
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Solution Overview
Problem
Existing trailer hitch security devices do not effectively prevent unauthorized hitching or removal of trailers, as they lack a robust mechanism to securely lock the hitch ball in place, allowing for potential theft or accidental detachment.
Innovation Solution
A security device comprising a bracket, clamp lever, clamp lever cover, and cover lock that allows the ball clamp to transition between clamped and unclamped states, with the cover lock ensuring the clamp lever remains in a secured position, preventing unauthorized access or detachment by engaging with the bracket or rearward portion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional hitch mechanism is used without additional security components, then the device complexity is low and ease of operation is high, but the reliability is insufficient to prevent unauthorized hitching or removal
Solution Approach 1:
The security device employs a nested structure where the clamp lever cover encloses the clamp lever, and the cover lock integrates with the bracket assembly. This nesting approach increases security reliability by protecting internal components while maintaining a compact overall structure that does not excessively increase device complexity
Solution Approach 2:
The security device is divided into distinct functional segments: the bracket for mounting, the clamp lever for securing the hitch ball, the clamp lever cover for protection and additional locking, and the cover lock for enhanced security. This segmentation allows each component to perform its specific function efficiently while contributing to overall system reliability without unnecessary complexity
2Reliability
If a security device with cover lock is added to the hitch mechanism, then the reliability and security are improved, but the ease of operation deteriorates due to additional locking steps
Solution Approach 1:
The clamp lever and clamp lever cover are designed as movable components that can transition between locked and unlocked positions. The dynamic nature of these components allows them to be easily manipulated when needed while maintaining secure locked positions during normal operation, balancing security reliability with operational ease
Solution Approach 2:
The security device is pre-configured with the cover lock engaged and the clamp lever in the secured position. This preliminary locked state ensures reliability is maintained by default, while allowing authorized users to quickly override the security when needed through simple manual manipulation of the cover and lever
Data Source
AI summary
A security device for a coupler for a trailer includes a bracket, a clamp lever cover, and a cover lock. The bracket is connected to the coupler, which includes a socket, a ball clamp, and a clamp lever. The clamp lever cover is engaged with the bracket and, in a secured arrangement, prevents movement of the clamp lever, thereby holding the ball clamp in a clamped arrangement, in turn retaining a hitch ball within the socket or preventing insertion of a hitch ball into the socket; in an unsecured arrangement the cover permits movement of the clamp lever from the engaged structural arrangement to the disengaged structural arrangement, thereby releasing the hitch ball or permitting insertion of a hitch ball. When unlocked the cover lock permits movement of the clamp lever cover to the unsecured arrangement; when locked retains the clamp lever cover in the secured arrangement.