Side-Mounted Trailer Hitch Tensioner for Restricted Access
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Solution Overview
Problem
Load-compensating trailer hitches face challenges in maintaining proper weight distribution due to limited access space for tensioning devices, leading to potential trailer sway and instability during towing, especially when load shifts occur.
Innovation Solution
A side-mounted chain-tensioning device with a reel unit, pivot pin, rotation-limiting element, latching mechanism, and a low-profile handle is designed to securely connect to trailer frames, allowing for easy tensioning of chains connected to spring bars, ensuring reliable load compensation even in restricted spaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional load-leveling spring bars with tensioning devices are used, then load distribution is improved, but access space requirements increase
Solution Approach 1:
The tensioning device is repositioned from a traditional rearward-facing location to a side-mounted configuration on the trailer frame. This dimensional change allows the device to access side spaces that are typically unused, resolving the contradiction between maintaining load distribution functionality and reducing access space requirements.
Solution Approach 2:
Instead of mounting the tensioning device on the towing vehicle or rearward on the trailer, the invention inverts the mounting approach by attaching it to the side of the trailer frame. This inversion creates access to previously unavailable side spaces, allowing the tensioning function to be maintained without requiring traditional access areas.
2Area of stationary object
If side-mounted tensioning device is used, then access space is reduced, but device complexity increases
Solution Approach 1:
The side-mounted tensioning device integrates multiple functions into a single unit: the reel spool stores and pays out the chain, the ratchet mechanism provides one-way locking and tension maintenance, and the side mounting structure attaches to the trailer frame. This multi-functionality reduces overall system complexity despite the unconventional mounting location.
Solution Approach 2:
The chain is stored coiled around the reel spool, with the ratchet mechanism nested within or adjacent to the reel assembly. This nesting arrangement consolidates multiple components into a compact side-mounted unit, reducing the complexity impact of the new mounting configuration.
3Ease of operation
If chain tensioning is simplified, then ease of operation is improved, but tensioning reliability may decrease
Solution Approach 1:
The ratchet mechanism automatically maintains chain tension without requiring continuous manual adjustment. Once the chain is tensioned by rotating the reel spool, the ratchet locks in place and maintains tension self-serviceingly, improving ease of operation while preserving reliability through the mechanical locking action.
Solution Approach 2:
The manual chain tensioning process is simplified by replacing direct manual tightening with a reel-spool-ratchet system. The user simply rotates the reel to wind the chain, and the ratchet mechanism automatically maintains tension, making the operation easier while ensuring reliable tension retention.
Data Source
AI summary
A tensioning device for connecting a trailer to a spring bar of a load-compensating apparatus includes a body unit for securement to a frame member of a trailer; a reel unit having an off-center hub portion with a slot and rotatively secured to the body unit about a pivot axis; a rotation-limiting element which limits rotation of the reel unit to approximately 180° about the pivot axis; a linked chain having a proximal end thereof releasably secured to the slot of the off-center hub portion and a distal end thereof connected to the spring bar of the load-compensating apparatus; a latching element including a biased latch pin; and a lug and removable handle for rotating the reel portion to, and the latching element releasably locks the reel portion in, a chain-tensioned configuration.