Work Vehicle Operator Station Suspension System
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Solution Overview
Problem
Work vehicles operating on uneven terrain or in noisy environments cause significant discomfort and fatigue for operators due to undesirable vibrations and noise, which existing suspension systems, such as rubber mounts and air cushion isolators, fail to adequately address.
Innovation Solution
A suspension system for the operator station of work vehicles, comprising a subframe structure, mounting pads, shock absorbers, a rear lateral rod, a front stabilizer, and a pitch control stabilizer, which allows for controlled motion in multiple directions and limits vibrations, thereby enhancing operator comfort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If rubber mounts and air cushion isolators are used to increase operator comfort, then vibration isolation is improved, but the system cannot adequately address the complex motion and vibrations from rugged terrain
Solution Approach 1:
The suspension system is divided into multiple independent components: shock absorbers for vertical motion, lateral rods for side-to-side motion, and pitch/roll stabilizers for rotational motion. Each component addresses a specific degree of freedom, allowing the system to handle complex multi-directional vibrations from rugged terrain while maintaining effective vibration isolation at each axis.
2Strength
If a rigid chassis is used to withstand rugged conditions, then structural strength is improved, but operator comfort deteriorates due to transmitted vibrations and noise
Solution Approach 1:
The operator station is extracted from the rigid chassis and mounted on a separate subframe structure with independent suspension components. This separation allows the chassis to maintain its strength for withstanding rugged conditions while the suspended operator station is isolated from transmitted vibrations and noise through the compliant suspension system.
3Object-affected harmful factors
If multiple stabilization components are added to control motion in multiple directions, then operator comfort is improved, but system complexity increases
Solution Approach 1:
The shock absorbers serve multiple functions: they provide vertical motion damping, support the operator station weight, and work in conjunction with the stabilizing rods and arms to control lateral and rotational motion. This multi-functionality reduces the need for completely separate components for each degree of freedom, managing system complexity while achieving comprehensive motion control.
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 suspension system effectively dampens vibrations and controls motion within predetermined limits, significantly reducing operator discomfort and fatigue by providing improved ride quality and noise reduction.
Implementation Method 1
The plurality of shock absorbers is connected between the chassis and the subframe structure near each of the mounting pads. The plurality of shock absorbers is configured to allow the operator station to move in a plurality of directions relative to the chassis.
Implementation Method 2
The rear lateral rod is connected to the subframe structure near one of the rear left mounting pad and the rear right mounting pad and to the chassis. The rear lateral rod extends laterally across the subframe structure and is configured to control lateral motion of the rear of the suspension system.
Implementation Method 3
The front stabilizer includes a left arm connected to the front side of the subframe structure and to the chassis at a location forward of the subframe structure, a right arm connected to the front side of the subframe structure and to the chassis at a location forward of the subframe structure, and a rod connected between the left arm and the right arm at a position between the front side of the subframe structure and the connection location of the chassis.
Implementation Method 4
The pitch control stabilizer includes a front arm connected a front connection link, a rear arm connected to a rear connection link, a rod connected between the front arm and the rear arm, a front retainer connecting a front portion of the rod to the chassis, and a rear retainer connecting a rear portion of the rod to the chassis.
Data Source
AI summary
A suspension system for an operator station of a work vehicle having a chassis includes a subframe structure, a plurality of mounting pads, a plurality of shock absorbers, a rear lateral rod, a front stabilizer, and a pitch control stabilizer. The plurality of mounting pads is positioned on a top surface of the subframe structure. The plurality of shock absorbers connects between the chassis and the subframe structure near each of the mounting pads. The rear lateral rod connects to the rear side of the subframe structure and to the chassis. The front stabilizer connects to the front side of the subframe structure and to the chassis. The pitch control stabilizer connects to the right side of the subframe structure and to the chassis.