Suspended Operator Station Vibration Isolation
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Solution Overview
Problem
Work machines, such as compact utility loaders and mowers, operated from a standing position experience discomfort and fatigue due to vertical movements and vibrations from uneven terrain, which are not effectively mitigated by existing technologies.
Innovation Solution
A work machine with a suspension system that connects the operator station, including the control station and platform, to the chassis, utilizing rubber torsion linkages and shock absorbers to cushion shocks and dissipate vibrations, allowing the operator controls to move with the platform and reduce fatigue.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the operator station is fixed to the chassis, then the control structure is simple and stable, but the operator experiences discomfort and fatigue due to vertical movements and vibrations from uneven terrain
Solution Approach 1:
The operator station is segmented from the chassis through independent suspension linkages, allowing the platform to move independently from the chassis while maintaining control functionality. This segmentation isolates the operator from chassis vibrations and vertical movements.
Solution Approach 2:
Suspension linkages serve as an intermediary mechanism between the chassis and operator station, absorbing vertical movements and vibrations. The rubber torsion linkages and shock absorbers act as damping elements that mediate the transmission of forces to the operator.
2Ease of operation
If the control station is fixed relative to the platform, then control precision is maintained, but the operator cannot compensate for vertical movements caused by terrain unevenness
Solution Approach 1:
The control station is made dynamic by allowing it to move with the platform through the suspension system. The control inputs remain accurate relative to the operator's position, while the entire control station can vertically adjust to terrain changes, maintaining both precision and adaptability.
3Ease of operation
If the platform is allowed to move vertically with the terrain, then operator fatigue is reduced, but the control station alignment with the chassis deteriorates
Solution Approach 1:
The suspension system changes the relative position parameter between the operator station and chassis dynamically. The rubber torsion linkages and shock absorbers allow controlled vertical movement while maintaining horizontal alignment, changing the vertical position parameter without compromising control station orientation.
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 significantly reduces operator fatigue and improves ride comfort by absorbing vibrations and shocks, maintaining control station and platform alignment with the chassis, and allowing for adjustable preload settings to accommodate individual operator preferences.
Implementation Method 1
utilizing rubber torsion linkages and shock absorbers to cushion shocks and dissipate vibrations
Implementation Method 2
utilizing rubber torsion linkages and shock absorbers to cushion shocks and dissipate vibrations
Data Source
AI summary
Work machines having an operator platform for standing operation of the work machine are disclosed. The work machines include a suspension system for suspending an operator station that includes an operator platform and a control station from a chassis of the work machine.