Trailer Coupler Lock Housing to Resist Shackle Tampering
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Solution Overview
Problem
Existing trailer couplers are vulnerable to theft and tampering due to inadequate locking mechanisms, primarily the shackle portion being easily disabled with common tools.
Innovation Solution
A trailer coupler security lock comprising a housing that fits over the coupler, a locking component that slides into the housing, and a lock that secures to the locking component, featuring a retainer to prevent removal without disassembling the retainer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a simple lock with shackle portion is used on the trailer coupler, then the locking mechanism is easy to operate and install, but the lock can be quickly disabled with inexpensive common tools
Solution Approach 1:
The locking component is divided into multiple segments: a housing that fits over the coupler, a locking component with a body and retainer, and a separate lock mechanism. This segmentation allows the lock to be more complex and secure while maintaining ease of operation through modular assembly and disassembly.
Solution Approach 2:
The lock mechanism is nested within the housing, which itself fits over the trailer coupler. The locking component's retainer is nested within the housing structure, creating multiple layers of protection that prevent tampering while allowing the user to operate the lock from the exterior.
2Reliability
If a durable lock structure is implemented to prevent tampering, then security against theft is improved, but the complexity of the locking mechanism increases
Solution Approach 1:
The housing serves multiple functions: it protects the locking component, provides a mounting structure for the lock, and fits over various trailer coupler types. The locking component itself serves both as a structural element and as the mechanism that secures the lock, reducing the need for additional separate components.
Solution Approach 2:
Instead of having the lock secure directly to the coupler, the housing fits over the coupler and the locking component secures to the housing. This inverted structure allows the complex security features to be enclosed within the housing while presenting a simple exterior interface to the user.
3Reliability
If a lock structure designed for specific trailer types is used, then the security performance is optimized, but the adaptability to various trailer types is reduced
Solution Approach 1:
The housing is designed with a universal fit that can accommodate various trailer coupler types and sizes. The locking component's retainer structure is configured to work with different coupler geometries, allowing the same lock assembly to provide optimized security performance across multiple trailer types without requiring customization.
Data Source
AI summary
A trailer coupler security lock includes a housing, locking component, and lock. The lock has a body and a shackle. The locking component has a body and retainer. The open lock shackle is inserted into the front access slot until the shackle contacts the short wall and then the locking component is inserted through the bottom access slot, through the lock shackle. The retainer is inserted into the locking component and secured by the retainer pin. In the unlocked state the locking component is held in the housing by the retainer. The trailer coupler security lock is transitioned to the locked state by inserting the locking component into the ball receiver of the trailer coupler until the locking component ledge contacts the short wall horizontal leg. The lock engages the body of the locking component by forcing the body onto the shackle, engaging the locking mechanism and the locking component.