Trailer Receiver Lock Pin with Segmented U-Shaped Design
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Solution Overview
Problem
Conventional trailer receiver locks are vulnerable to unauthorized removal due to a weak locking mechanism, which can be sheared by applying a sharp force, compromising the security and strength of the hitch assembly.
Innovation Solution
A trailer receiver lock design featuring a pin member with a U-shaped configuration and a locking mechanism that includes a base with two legs, where one leg inserts into the receiver and hitch bar apertures, and the other leg engages with a locking mechanism capable of withstanding greater impact forces, using a ball bearing or bolt for secure engagement and a release mechanism for authorized removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a conventional pin lock assembly is used, then the hitch bar can be conveniently removed for interchange, but the lock can be sheared by applying a sharp force allowing unauthorized removal
Solution Approach 1:
The pin lock assembly is segmented into multiple functional portions: a head portion for engagement, an intermediate section with increased diameter for strength, and a tail portion for actuation. This segmentation allows each portion to be optimized for its specific function while collectively providing both convenience and security.
Solution Approach 2:
The intermediate section of the pin is designed with a diameter greater than both the head and tail portions, creating a localized reinforcement zone. This local quality enhancement provides the structural strength needed to resist shearing forces while maintaining the overall functionality of the lock assembly.
2Ease of operation
If the pin groove has a smaller diameter than the intermediate section, then the lock assembly can be engaged, but the groove becomes a weak point susceptible to shearing
Solution Approach 1:
The pin features a localized thickening or reinforcement at the groove region, creating a local quality enhancement that specifically addresses the weakness at the engagement point while maintaining the necessary geometry for lock assembly engagement.
Solution Approach 2:
The groove is designed with preliminary reinforcement features such as increased material density or structural support elements that are built into the pin structure before use, ensuring the groove can withstand shearing forces without failing.
3Strength
If a fixed ball hitch is used, then the structure is simple and strong, but the hitch lacks versatility for different accessories
Solution Approach 1:
The removable pin lock assembly is nested within the receiver tube, allowing it to be stored when not in use and deployed when needed. This nesting approach maintains the simplicity and strength of the fixed hitch structure while adding the versatility of removable accessories.
Solution Approach 2:
The hitch system transitions from a completely fixed structure to a dynamic system where the pin lock assembly can be inserted and removed as needed. This dynamic capability allows the hitch to adapt between secured and unsecured states, enabling accessory interchange while maintaining structural integrity.
Data Source
AI summary
The present invention is directed to a trailer receiver lock for locking a trailer hitch to prevent unauthorized use. An embodiment of the trailer receiver lock for locking a trailer hitch, wherein the trailer hitch includes a receiver and a hitch bar, may include a body including a locking mechanism and a pin member including a base. A first leg may extend from the base, wherein the first leg may include an end capable of insertion into an aperture in the receiver and an aperture in the hitch bar. A second leg may extending from the base, wherein the second leg may include an end capable of insertion into the body. The second leg may also include at least one engagement portion capable of engagement with the locking mechanism.