Operator Station Suspension with Multi-Directional Rods
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Solution Overview
Problem
Operator stations in work vehicles, such as agricultural and construction vehicles, experience discomfort and fatigue due to the harsh ride quality caused by vibrations and noise from rough terrain, which existing suspension systems like rubber mounts and air cushion isolators do not adequately address.
Innovation Solution
A suspension system for the operator station that includes a subframe structure with mounting pads, suspension assemblies, lateral and longitudinal rods, a stabilizer bar, and a roll control bar, allowing the operator station to move in multiple directions while restricting unwanted motions and maintaining prescribed pitch and roll rates, and utilizing noise and vibration isolators to reduce transmission of vibrations and noise.
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 noise from rough terrain
Solution Approach 1:
The suspension system is divided into multiple independent components: lateral rods for side-to-side motion control, longitudinal rods for front-to-back motion control, pitch control bars for rotational motion, and roll control bars for rotational motion. Each component addresses a specific degree of freedom, allowing the system to handle complex multi-directional motions from rough terrain while maintaining vibration isolation effectiveness.
Solution Approach 2:
The suspension system incorporates movable linkages that can dynamically adapt to various motion conditions. The rods and bars are configured to move and rotate relative to each other, enabling the system to respond to complex, varying terrain conditions while maintaining optimal vibration isolation performance across different operating scenarios.
2Stability of the object's composition
If a complex suspension system with multiple rods and bars is added to control all directions of motion, then motion control is improved, but device complexity increases
Solution Approach 1:
Each suspension component is designed to perform multiple functions. For example, the lateral rods not only control side-to-side motion but also contribute to roll stability. The longitudinal rods control front-to-back motion while also affecting pitch behavior. This multi-functionality reduces the need for separate dedicated components for each motion control function, thereby managing complexity.
Solution Approach 2:
The suspension system merges multiple control functions into an integrated linkage structure. The rods and bars are interconnected in a coordinated manner, where a single component can simultaneously influence multiple degrees of freedom. This merging approach consolidates what would otherwise require separate independent systems, reducing overall device complexity while maintaining 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 system effectively reduces vibrations and noise, enhancing operator comfort and reducing fatigue by allowing the operator station to move freely while controlling unwanted motions, thereby improving the overall ride quality and reducing noise transfer.
Implementation Method 1
A plurality of suspension assemblies are connected between the chassis and the subframe structure near each of the mounting pads. The suspension assemblies are configured to allow the operator station to move in a plurality of directions relative to the chassis.
Implementation Method 2
A first lateral rod is connected to the subframe structure near one of the mounting pads and to the chassis. The first lateral rod extends laterally across the subframe structure and is configured to restrict a side-to-side motion of the operator station.
Implementation Method 3
A first longitudinal rod is connected to the subframe structure near one of the mounting pads and to the chassis. The first longitudinal rod extends longitudinally along the subframe structure and is configured to restrict a front-to-back motion of the operator station.
Implementation Method 4
A stabilizer bar is connected to the subframe structure at two locations and to the chassis. The stabilizer bar extends longitudinally along the subframe structure and is configured to maintain a prescribed forward and rearward pitch rate of the operator station.
Implementation Method 5
A roll control bar is connected to the subframe structure at two locations and to the chassis. The roll bar extends laterally across the subframe structure and is configured to maintain a prescribed left and right roll rate of the operator station.
Implementation Method 6
utilizing noise and vibration isolators to reduce transmission of vibrations and noise
Data Source
AI summary
A suspension system for an operator station of a vehicle having a chassis includes a subframe structure positioned between the operator station and the chassis. The subframe structure includes a plurality of mounting pads configured to support the operator station. A plurality of suspension assemblies are connected between the chassis and the subframe structure near each of the mounting pads. A first lateral rod is connected between the subframe structure near one of the mounting pads and the chassis. A first longitudinal rod is connected between the subframe structure near one of the mounting pads and the chassis. A stabilizer bar is connected between the subframe structure at two locations and the chassis. A roll control bar is connected between the subframe structure at two locations and the chassis.