Vibration attenuator for car seat back with adjustable vibration absorption frequency

Abstract

The invention relates to an automobile seat backrest vibration attenuator with the adjustable vibration absorption frequency, the automobile seat backrest vibration attenuator comprising a baseplate arranged transversely. A vertically-upward left mounting plate is arranged at the left end of the baseplate, a vertically-upward right mounting plate is arranged at the right end of the baseplate, the inner sides of the left mounting plate and the right mounting plate are provided with opposite chutes, a mass piece is transversely arranged above the baseplate, and two ends of the mass piece extend into the chutes of the left mounting plate and the right mounting plate; at least one compression spring is arranged between the baseplate and the mass piece, and the mass piece can slide up and down along the chutes and drives the compression spring to make telescopic movement. By applying the attenuator, vibration of the automobile seat under external excitation can be effectively attenuated, the automobile seat backrest vibration attenuator can adapt to different driving working conditions of the automobile, vibration at different frequencies is attenuated, and the dynamic comfort of the seat is improved.

Description

technical field [0001] The invention relates to an accessory device of an automobile body, in particular to an automobile seat back vibration attenuator with adjustable vibration-absorbing frequency. Background technique [0002] The car seat often produces strong vibration during driving. The dynamic comfort of the car seat refers to the comfort experienced by the seat after the vibration is transmitted to the human body through the seat frame and seat cushion under the driving state. It is mainly related to the vibration characteristics. related. The most sensitive frequency range of the human body is: the vertical vibration is 4~8Hz, and the horizontal vibration is below 2Hz. How to reduce the vibration in this frequency range as much as possible is the main goal. In order to make the car seat have good dynamic comfort, the passive vibration isolation method is widely used at home and abroad to attenuate the harmful vibration of the seat. Because the passive control vibr...

AI Technical Summary

Problems solved by technology

However, in fact, under different working conditions of the car, the external excitation frequency of the seat is also constantly changing, and the frequency range is wide. It is not possible to change the spring stiffness of the shock absorber only by changing the driver's weight. It can effectively attenuate the vibration at most excitation frequencies. Therefore, it is extremely necessary to develop a car seat back vibration attenuator suitable for various models and with adjustable vibration absorption frequency.

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