Tilted-Axis Spring Bar Trailer Hitch for Dynamic Sway Control
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Solution Overview
Problem
Existing weight-distributing trailer hitches fail to effectively control trailer sway by dynamically adjusting tension in spring bars during swaying, often requiring additional parts and not fully addressing the issue of trailer alignment and stability.
Innovation Solution
A weight-distributing hitch with a forwardly-extending shank, hitch head, elevating mechanism, leveling mechanism, and rearwardly-extending spring bars, where the spring bars' stabilizing axes are tilted rearwardly, allowing tension in one spring bar to increase while the opposing spring bar's tension decreases during swaying, counteracting trailer sway without additional parts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If spring bars are used to distribute tongue weight, then weight distribution is improved, but trailer sway control is insufficient
Solution Approach 1:
The spring bars are designed with the ability to dynamically adjust tension during trailer sway events. When the trailer sways, the spring bars pivot about their stabilizing axes, automatically increasing tension on the outside spring bar and decreasing tension on the inside spring bar, creating a restoring moment that counteracts the sway. This dynamic tension adjustment resolves the contradiction by making the weight distribution system actively responsive to sway conditions rather than statically fixed.
Solution Approach 2:
The patent changes the physical parameters of the spring bar system by tilting the stabilizing axes rearwardly from vertical. This geometric parameter change allows the spring bars to generate horizontal restoring forces during sway while maintaining vertical weight distribution functionality. The rearward tilt angle transforms the spring bar mechanism from a purely vertical weight-bearing structure into one that can also generate horizontal anti-sway moments.
2Reliability
If additional sway control parts are added, then trailer sway control is improved, but device complexity increases
Solution Approach 1:
The spring bars are designed to perform multiple functions: distributing tongue weight vertically and controlling trailer sway horizontally. By giving the spring bars the capability to pivot about rearwardly-tilted stabilizing axes, they simultaneously achieve both weight distribution and sway control without requiring separate dedicated sway control devices. This multi-functionality resolves the contradiction by eliminating the need for additional components while maintaining both functions.
Solution Approach 2:
The patent merges the sway control function into the existing spring bar weight distribution system. Instead of adding separate sway control plates, friction pads, or cables, the spring bars themselves are configured to provide both weight distribution and sway control through their pivoting action about the tilted stabilizing axes. This merging of functions reduces device complexity while improving reliability.
3Stability of the object's composition
If spring bar tension is increased to control sway, then trailer alignment is improved, but tension distribution becomes uneven
Solution Approach 1:
During trailer sway, the system creates an anti-weight effect by increasing tension in the outside spring bar and decreasing tension in the inside spring bar. The increased tension in the outside spring bar acts as a counterbalancing force that generates a restoring moment to return the trailer to center alignment. This dynamic counterbalancing resolves the contradiction by allowing uneven tension distribution during sway events while maintaining overall trailer alignment stability.
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
This design dynamically counteracts trailer sway by adjusting tension in spring bars, maintaining trailer alignment and stability, and does so without requiring additional components like sway control plates or friction pads, ensuring reliable performance and long-lasting functionality.
Implementation Method 1
the spring bars' stabilizing axes are tilted rearwardly, allowing tension in one spring bar to increase while the opposing spring bar's tension decreases during swaying, counteracting trailer sway
Data Source
AI summary
An anti-sway, tongue-weight equalizing hitch for a trailer having a hitch ball socket; a shank structured for releasably connecting to a towing vehicle; a hitch head secured to the shank and having a longitudinal axis, a hitch ball with a tow axis on the longitudinal axis; an elevating mechanism for adjusting the relative elevations of the hitch head and the trailer tongue; a leveling mechanism for vertically-orienting the tow axis; right and left spring bars mounted to the hitch head to pivot about opposing right and left rearwardly-tilted stabilizing axes disposed in opposing vertically-oriented pivot axis planes spaced laterally and equidistantly outwardly from the longitudinal axis; and right and left suspension mechanisms tensionally suspending distal ends of the spring bars wherein distal ends thereof are normally spaced laterally and equidistantly outwardly from the respective vertical-oriented pivot axis planes in an equilibrium configuration.