Vehicle Seat Lateral Isolator With Rolling Rails and Damping
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Solution Overview
Problem
Current vehicle seat systems fail to effectively isolate drivers from road vibrations and uneven road conditions, leading to discomfort, ergonomic issues, and potential health problems for drivers operating heavy machinery.
Innovation Solution
A lateral isolator is mounted between the seat bench and the seat suspension system, comprising lower and upper rails, rail bars, rolling elements, shock absorbers, springs, and a balance apparatus, which work together to reduce friction and stabilize movement, allowing for activation or deactivation based on driver needs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If no isolator system is used in the seat, then the structure remains simple and cost-effective, but road vibrations and movements are directly transmitted to the driver causing discomfort and health problems
Solution Approach 1:
The isolator system is divided into separate functional components: lower rails fixed to suspension, upper rails attached to seat bench, rolling elements for friction reduction, shock absorbers for vibration damping, and springs for movement stabilization. This segmentation allows each component to perform its specific function efficiently while maintaining overall system manageability
Solution Approach 2:
Rolling elements are introduced as intermediary components between the lower and upper rails to reduce direct friction contact. These rolling elements act as mediators that enable smooth relative movement while minimizing friction-generated heat and wear, thereby reducing vibration transmission to the driver
2Ease of operation
If friction between rails is high, then the structure is simpler without rolling elements, but movement between rails is restricted and driver comfort is reduced
Solution Approach 1:
The patent replaces direct sliding friction between metal rails with rolling friction through the introduction of rolling elements. This substitution transforms the mechanical interaction from high-friction sliding contact to low-friction rolling contact, enabling smoother rail movement with minimal resistance
Solution Approach 2:
The friction parameter between the rails is changed by introducing rolling elements that convert sliding friction into rolling friction. This parameter change significantly reduces the friction force, allowing the upper rails to move smoothly along the lower rails in response to road vibrations while maintaining structural integrity
3Object-affected harmful factors
If shock absorbers and springs are added to limit rail movement, then driver comfort is improved, but the device complexity and manufacturing cost increase
Solution Approach 1:
Shock absorbers and springs are pre-installed within the isolator system to provide cushioning before vibrations reach the driver. These components are positioned in advance between the lower and upper rails to absorb and dampen road vibrations, preventing direct transmission to the seat and driver
Solution Approach 2:
The isolator system combines multiple materials with different damping characteristics: metal rails for structural strength, rolling elements for friction reduction, shock absorbers for vibration damping, and springs for elastic recovery. This composite approach allows each material to contribute its optimal properties, achieving effective vibration isolation while maintaining manufacturing feasibility
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 lateral isolator significantly reduces the transmission of road vibrations and movements to the driver, enhancing comfort and ergonomics, thereby minimizing discomfort and health risks associated with prolonged sitting and vehicle vibrations.
Implementation Method 1
at least one rolling element positioned between the lower rails and the upper rails to reduce the friction generated during the movement of the lower rails and the upper rails on each other
Implementation Method 2
a shock absorber positioned between the lower rail and the upper rail to limit and stabilise movement between the lower rail and the upper rail
Implementation Method 3
two springs positioned between the lower rail and the upper rail to limit and stabilise the movement between the lower rail and the upper rail
Data Source
AI summary
Disclosed is a lateral isolator for use in vehicle seats. In particular, disclosed is a lateral isolator for seats used in heavy machinery and vehicles to ensure that the driver is minimally affected by road conditions on rough roads or in difficult operating conditions.