Double-layer vibration isolation chair

Abstract

The invention discloses a double-layer vibration isolation seat, which comprises a seat surface and a vibration isolation platform arranged below the seat surface, wherein a seat base is arranged below the vibration isolation platform, and is characterized in that: a first-layer vibration isolation structure positioned at the lower layer and a second-layer vibration isolation structure positionedat the upper layer are arranged between the seat base and the vibration isolation platform, wherein the first-layer vibration isolation platform structure comprises vertically arranged vertical damping springs and negative rigidity vibration isolation structure arranged at the front and rear sides of the vertical damping springs, and the second-layer of vibration isolation structure is arranged above the vertical damping spring. The double-layer vibration isolation seat disclosed by the invention is simple and compact in structure and good in vibration isolation effect; the vibration isolationstructure at the bottom layer is connected with the spring damping above in series to form the double-layer vibration isolation structure, so that the damping ratio, the mass ratio and the rigidity ratio can be properly reduced, thereby the vibration isolation performance of the whole double-layer vibration isolation system is improved; meanwhile, the chair has the advantages of low cost, high reliability and comfort, and better application prospect.

Description

technical field [0001] The invention belongs to the technical field of automobiles, and more particularly, relates to a double-layer vibration isolation seat. Background technique [0002] The car seat is a part of the passenger and driver in the car. Its main function is to support the quality of the passenger and the driver, and at the same time relieve the vibration caused by the impact and attenuation transmitted to the human body by the uneven road surface. As the last link of damping vehicle vibration, car seat plays a vital role in the comfort performance of the whole vehicle. Especially in construction machinery, agricultural machinery and vehicles driving on non-paved roads, due to the limitations of the working environment and the influence of harsh road conditions, low-frequency vibrations have become more and more important to the injury of drivers and passengers. According to the statistics of the World Health Organization, in recent years, cervical spondylosis...

AI Technical Summary

Problems solved by technology

Although its vibration isolation effect is good, its cost is high and its reliability is poor. The control of the actuator of the electro-hydraulic and electro-pneumatic active vibration reduction system will make corresponding changes as the motion state of the seat changes.

Since the seat active suspension system requires the driving mechanism of the seat suspension system to respond quickly, it will inevitably lead to a complex structure of the active control system, high cost, high energy consumption, and poor anti-interference ability. In the case of failure, the control of the entire active suspension system is useless, which is equivalent to a passive suspension, and may even cause the vibration reduction effect to be inferior to that of a passive suspension. These circumstances limit the use of active and semi-active seat suspensions. Restricts the popularity of its application on vehicles, and is only applied to a small number of vehicles

[0004] The second type is a linear vibration-isolation seat, which is generally a traditional passive vibration-isolation linear suspension seat. This type of seat has a linear suspension system, which is low in cost and widely used, but it is difficult to provide it to passengers in different road conditions. The comfort of personnel is better, and its low-frequency vibration isolation effect is poor;

[0005] The third type is the nonlinear vibration-isolation seat, which has a better vibration-isolation effect, but it is only known to researchers in the seat field, and only the scissor mechanism is used as the vertical motion guiding mechanism of the seat, and an additional nonlinear isolation is required. Based on vibration theory, the vibration isolation mechanism of the seat is designed separately, and the guiding mechanism and the vibration isolation mechanism are independent of each other, resulting in a complex structure of the suspension system, which is not compact, takes up a large space, is not easy to install, and requires many precision parts and high costs. , poor stability and reliability, resulting in no mature high-performance low-frequency vibration isolation seat available

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