Seat Suspension Rolling Absorption Mechanism
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Solution Overview
Problem
Conventional seat suspensions fail to effectively absorb low-cycle vibrations caused by rolling, leading to increased lateral shifts and instability in vehicle posture, which can result in motion sickness, especially in vehicles with long wheelbases and hydraulic suspension systems.
Innovation Solution
A seat suspension system incorporating a rolling absorption mechanism with elastic members and link mechanisms that absorb low-cycle vibrations by allowing the seat support member to move laterally relative to the vehicle body attachment member, using coil springs and link mechanisms to stabilize the seat and reduce body displacement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional seat suspension with magnetic spring and torsion bar is used, then vertical and forward-backward vibrations are absorbed, but low-cycle vibrations due to rolling are not absorbed
Solution Approach 1:
The invention divides the vibration absorption function into separate mechanisms: the magnetic spring and torsion bar handle vertical and forward-backward vibrations, while the newly added rolling absorption mechanism (comprising link mechanisms and elastic members) specifically handles rolling vibrations. This segmentation allows each mechanism to be optimized for its specific function without interfering with others.
Solution Approach 2:
The seat suspension is enhanced to perform multiple vibration absorption functions simultaneously. The original magnetic spring and torsion bar continue to absorb vertical and forward-backward vibrations, while the added rolling absorption mechanism enables the system to also absorb low-cycle rolling vibrations, making the suspension system universally effective against multiple vibration types.
2Reliability
If hydraulic suspension with long wheel base is used, then vertical and forward-backward vibration absorption is improved, but lateral phase shift increases causing rolling
Solution Approach 1:
The rolling absorption mechanism acts in advance to counteract lateral phase shifts and rolling vibrations before they can significantly affect passenger stability. The link mechanisms and elastic members are pre-configured to detect and respond to rolling tendencies, applying counteracting forces that prevent excessive lateral movement and maintain posture stability.
3Adaptability or versatility
If rolling absorption mechanism with link mechanisms and elastic members is added, then rolling vibrations are absorbed, but device complexity increases
Solution Approach 1:
The rolling absorption mechanism utilizes elastic members that function as flexible elements to absorb rolling vibrations. These elastic members provide the necessary compliance and vibration absorption while maintaining a relatively compact and simple structural form, avoiding the need for complex rigid mechanisms.
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 solution effectively absorbs rolling-induced vibrations, enhancing seat stability and reducing the occurrence of motion sickness by maintaining the seat support member's center position relative to rolling movements, thereby minimizing lateral displacement and maintaining posture stability.
Implementation Method 1
a coil spring as the elastic member disposed between the elastic member support part and a portion on the vehicle body side
Implementation Method 2
an upper frame provided to be vertically movable with respect to a lower frame attached to a vehicle body floor is supported elastically with a magnetic spring
Data Source
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AI summary
The present invention improves an absorption characteristic of low-cycle vibrations resulting from rolling. A seat support member (20) supporting a seat is provided via a rolling absorption mechanism (30) for absorbing rolling on brackets (13) to (16) as a vehicle body side attachment member attached to the vehicle body side. Thus, rolling (low-cycle vibrations) generated by a phase shift or the like of a hydraulic suspension of the vehicle can be absorbed by the rolling absorption mechanism (30), a lateral displacement of the body of the seated person can be prevented, stability of a seated posture can be increased, and moreover occurrence of motion sickness can be suppressed.