Self-Activating Trailer Stop for Watercraft Security
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Solution Overview
Problem
Existing devices for preventing watercraft from sliding off trailers are complex, heavy, costly, and difficult to use effectively, lacking a simple and efficient self-activating mechanism.
Innovation Solution
A self-activating stop apparatus comprising a U-shaped channel housing with a pivotally-mounted stop element and a spring, which automatically deploys to prevent the watercraft from sliding off when the transom clears the stop element, featuring a lightweight and durable design suitable for both salt and fresh water environments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing devices are used to prevent watercraft from sliding off trailers, then the watercraft is secured, but the devices are complex, heavy, and costly
Solution Approach 1:
The device is divided into three main segments: a U-shaped channel housing, a pivotally-mounted stop element, and a spring mechanism. This segmentation allows each component to be simple in design while collectively providing reliable watercraft security, resolving the contradiction between simplicity and effectiveness
Solution Approach 2:
The stop element is pivotally mounted rather than fixed, allowing it to dynamically transition between retracted and deployed positions. This dynamic design enables the device to adapt to different operational states (loading vs. securing) without requiring complex mechanical systems, addressing both reliability and simplicity requirements
2Reliability
If existing devices are used to prevent watercraft from sliding off trailers, then the watercraft is secured, but the devices are heavy
Solution Approach 1:
The U-shaped channel housing and stop element are designed as thin-walled structures that provide sufficient structural strength and security function while minimizing material usage and overall device weight, effectively resolving the contradiction between security reliability and weight reduction
3Reliability
If existing devices are used to prevent watercraft from sliding off trailers, then the watercraft is secured, but the devices are costly
Solution Approach 1:
The device utilizes standard spring mechanisms and simple geometric shapes (U-shaped channel, pivotally-mounted element) that can be manufactured using conventional processes. By changing the design parameters to favor simple geometries and standard components, the manufacturing cost is significantly reduced while maintaining watercraft security reliability
Solution Approach 2:
The device is designed with simple, replaceable components that can be manufactured at low cost. The U-shaped channel housing and stop element can be produced using inexpensive materials and processes, making the overall device cost-effective compared to complex existing solutions
4Reliability
If existing devices are used to prevent watercraft from sliding off trailers, then the watercraft is secured, but the devices are difficult to use
Solution Approach 1:
The spring mechanism automatically urges the stop element into the deployed position to secure the watercraft, and the watercraft's own movement during loading automatically retracts the stop element. This self-service operation eliminates the need for manual activation or complex control systems, resolving the contradiction between security reliability and ease of operation
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution provides a lightweight, easy-to-use, and cost-effective mechanism that automatically deploys to prevent watercraft from sliding off trailers, ensuring secure transportation and easy loading/unloading without the need for complex constructions.
Implementation Method 1
a spring positioned between the stop element and a portion of the U-shaped channel housing, the spring urging the stop element into the deployed mode
Data Source
AI summary
An apparatus and method for providing a self-activating stop device at the back of a hauling trailer for a boat. The apparatus is a compact, lightweight and durable U-shaped housing having a retractable stop element pivotably positioned therein. Through-holes in the housing permit the apparatus to be quickly and easily secured to bunkers or other framing at the trailer back end. The U-shaped housing's top surface can be easily aligned with the top surface of the bunk or framing while the stop element is biased in an upright position. When the boat is lifted out of the water and slid onto the bunker or framing, the boat's presence pivots the stop element down into the housing and once the transom of the boat passes over the stop element, the stop element self-activates, pivoting upward acting as a stop against the transom, thereby preventing the boat from sliding back off of the trailer.