Seat Cushion Support Mechanism for Vibration and Impact Absorption
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Solution Overview
Problem
Existing seat cushioning systems in transportation equipment, such as automobiles, aircraft, and ships, face limitations in achieving high vibration absorption and impact absorption characteristics, particularly during normal driving and larger load fluctuations.
Innovation Solution
A seat cushioning member support mechanism featuring a first spring-damping mechanism and a second spring-damping mechanism arranged in series, connected via a link, with a front and rear torsion bar system and damping members, enhancing the vibration and impact absorption capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single spring-damping mechanism is used to support the cushioning member, then the structure is simple, but the vibration absorbing characteristic and impact absorbing characteristic are insufficient
Solution Approach 1:
The support mechanism is divided into two independent spring-damping mechanisms (first and second) that operate in parallel. Each mechanism consists of a spring element and a damping element connected in series, allowing them to handle different aspects of vibration and impact separately yet cooperatively, thereby improving overall performance without creating an overly complex integrated system
Solution Approach 2:
The patent combines spring elements (providing elastic recovery) and damping elements (providing energy dissipation) into a composite spring-damping mechanism. This composite approach allows the system to simultaneously exhibit both elastic and damping characteristics, improving vibration and impact absorption while maintaining structural efficiency
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 improves vibration absorption and impact absorption characteristics by decreasing the total spring constant and increasing damping, resulting in a nonlinear Duffing-type characteristic, effectively managing both low-frequency and high-frequency vibrations.
Implementation Method 1
a first spring-damping mechanism and a second spring-damping mechanism which exhibits a spring-damping characteristic according to the displacement input to the first spring-damping mechanism
Implementation Method 2
the first spring-damping mechanism and the second spring-damping mechanism are arranged in a stack direction and connected to each other via a link
Data Source
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AI summary
An impact absorbing characteristic is improved more than conventionally with a simple structure. Front links (211) (212) coupled to a front torsion bar (210) and rear links (221) (222) coupled to a rear torsion bar (220) are arranged at a predetermined interval from each other in a front and rear direction of a seat, and when a predetermined load or larger is applied, the front links (211) (212) and the rear links (221) (222) rotate in opposite directions, and dampers (230) are disposed to extend between lower portions of the front links (211) (212) and the rear links (221) (222). When a predetermined load fluctuation or larger occurs, the dampers (230) expand or contract to exhibit a damping force, and a load fluctuation smaller than this does not cause the dampers (230) to expand or contract and is alleviated by elasticity of the front torsion bar (210) and the rear torsion bar (220).