Trailer Axle Suspension Linkage for Misalignment and Lateral Stability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing trailer axle suspension systems experience premature wear and failure due to twisting of the axle bracket or swing arm caused by uneven loading, and lateral shifting of the axle relative to the trailer frame due to changes in geometry between the track bar, trailing arm, and trailer frame.
Innovation Solution
Incorporating a resilient pad between the axle and swing arm to allow slight misalignment while limiting excessive movement, and a track bar connected between the axle beam and swing arm to create a 3-bar linkage that stabilizes lateral movement and allows pivoting for shock absorption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a rigid connector is used between the axle and swing arm, then structural strength is improved, but the swing arm cannot accommodate misalignment without causing premature wear and failure
Solution Approach 1:
The connector is changed from a rigid structure to a resilient structure that can change its physical state (flex/deflect) to accommodate misalignment between the swing arm and axle, preventing wear and failure while maintaining structural integrity
Solution Approach 2:
A resilient pad is introduced as an intermediary element between the rigid swing arm and axle connector, allowing relative movement and misalignment accommodation without direct metal-to-metal contact, thus preventing premature wear
2Stability of the object's composition
If a track bar is connected between the axle and trailer frame, then lateral stability is improved, but the axle shifts laterally relative to the trailer frame when suspension is compressed
Solution Approach 1:
The track bar connection geometry is designed to be dynamic rather than fixed, allowing the connection points and angles to change as the suspension compresses, enabling lateral stability during normal operation while accommodating suspension movement
Solution Approach 2:
The track bar is repositioned to connect to the swing arm rather than directly to the trailer frame, creating a three-bar linkage system that adds a dimensional degree of freedom to accommodate both lateral stability and suspension compression
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 system reduces premature wear and failure by allowing slight misalignment without breaking, while maintaining stability and absorbing shocks, thus extending the life of the suspension components.
Implementation Method 1
A resilient pad is secured between the bottom surface of the connector and the swing arm. The resilient pad is configured to permit the connector to deflect to a position that is non-parallel with the swing arm.
Implementation Method 2
A spring is connected at one end to the swing arm and is connected at an opposite end to the trailer frame. Such a suspension system serves to absorb road surface irregularities, providing a smoother ride for the trailer.
Implementation Method 3
The track bar connections may be pivotable. The assembly creates a 3-bar linkage that ties the full system together to limit side-to-side movement but still allows pivoting of the bar for some shock absorption of movement and return to center.
Data Source
AI summary
An axle suspension system is suited for a trailer including a trailer frame, an axle, and left and right wheels respectively connected on opposite ends of the axle. The axle suspension system includes a swing arm pivotably securable at one end to the trailer frame and connectable at an opposite end to the axle via a connector. The connector includes a bottom surface connected to the swing arm. A spring is connected at one end to the swing arm and is connectable at an opposite end to the trailer frame. A resilient pad may be secured between the bottom surface of the connector and the swing arm. In some arrangements, a track bar may be securable at one end to the axle and may be secured at an opposite end to the swing arm.